{"id":6723,"date":"2026-08-12T11:49:50","date_gmt":"2026-08-12T03:49:50","guid":{"rendered":"https:\/\/belirollforming.com\/?p=6723"},"modified":"2026-08-17T12:07:55","modified_gmt":"2026-08-17T04:07:55","slug":"%d8%ae%d8%af%d8%b4-%d8%b9%d9%84%d9%89-%d8%b3%d8%b7%d8%ad-%d8%a7%d9%84%d8%b4%d8%b1%d9%8a%d8%b7-%d8%a7%d9%84%d9%85%d8%b4%d9%83%d9%84-%d8%a8%d8%a7%d9%84%d8%af%d8%b1%d9%81%d9%84%d8%a9","status":"publish","type":"post","link":"https:\/\/belirollforming.com\/ar\/roll-forming-surface-scratch\/","title":{"rendered":"\u0625\u0635\u0644\u0627\u062d \u0627\u0644\u062e\u062f\u0648\u0634 \u0627\u0644\u0633\u0637\u062d\u064a\u0629 \u0627\u0644\u0646\u0627\u062a\u062c\u0629 \u0639\u0646 \u0639\u0645\u0644\u064a\u0629 \u0627\u0644\u062a\u0634\u0643\u064a\u0644 \u0628\u0627\u0644\u062f\u0631\u0641\u0644\u0629: 6 \u062d\u0644\u0648\u0644 \u0644\u062a\u0644\u0645\u064a\u0639 \u0627\u0644\u0623\u0633\u0637\u0648\u0627\u0646\u0627\u062a \u0648\u0633\u062f \u0627\u0644\u0641\u062c\u0648\u0627\u062a"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"6723\" class=\"elementor elementor-6723\" data-elementor-post-type=\"post\">\n\t\t\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-fa2fd7c e-flex e-con-boxed e-con e-parent\" data-id=\"fa2fd7c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f9d121f elementor-widget elementor-widget-text-editor\" data-id=\"f9d121f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>\u0645\u0642\u062f\u0645\u0629<\/h2><p><strong>Roll forming surface scratch<\/strong>\u00a0defects are the most common quality rejection on a cold forming line. A single deep scratch can send a whole panel to scrap. With 20 to 40 percent of defects in rolled products traced to surface damage, the cost adds up fast.<\/p><p>Most scratches are not random. They come from two repeatable sources: roller surface condition and roller gap settings. Fix both and most mark defects disappear.<\/p><p>This guide covers six roller polish and gap solutions for\u00a0<strong>\u062e\u062f\u0648\u0634 \u0623\u0633\u0637\u062d \u0627\u0644\u062a\u0634\u0643\u064a\u0644 \u0628\u0627\u0644\u0645\u062f\u0627\u062d\u0644<\/strong>\u00a0control. You get roller gap starting values, target finishes, and a maintenance schedule that stops scratches before they start.<\/p><p><strong>Roll forming surface scratch<\/strong>\u00a0problems are best solved at the\u00a0<a href=\"https:\/\/belirollforming.com\/ar\/%d8%a3%d8%af%d9%88%d8%a7%d8%aa-%d8%aa%d8%b4%d9%83%d9%8a%d9%84-%d8%a7%d9%84%d9%84%d9%81%d8%a7%d8%a6%d9%81\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u0623\u062f\u0648\u0627\u062a \u062a\u0634\u0643\u064a\u0644 \u0627\u0644\u0644\u0641\u0627\u0626\u0641<\/a>\u00a0level. For the full machine picture, see the\u00a0<a href=\"https:\/\/belirollforming.com\/ar\/%d9%85%d9%83%d9%88%d9%86%d8%a7%d8%aa-%d8%a2%d9%84%d8%a9-%d8%aa%d8%b4%d9%83%d9%8a%d9%84-%d8%a7%d9%84%d9%84%d9%81%d8%a7%d8%a6%d9%81\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u0645\u0643\u0648\u0646\u0627\u062a \u0622\u0644\u0629 \u062a\u0634\u0643\u064a\u0644 \u0627\u0644\u0644\u0641\u0627\u0626\u0641<\/a> \u0645\u0631\u0634\u062f.<\/p><h2>What Are Roll Forming Surface Scratch and Mark Defects?<\/h2><p>A surface defect is any unintended scratch, mark, or blemish left on the strip after it passes through the forming stands.\u00a0<strong>Roll forming surface scratch<\/strong>\u00a0defects are grooves, lines, or gouges aligned with the strip travel direction. Mark defects are shorter, wider, and shaped like the roller or debris that caused them.<\/p><p>Three defect families cover almost every case:<\/p><ul><li>Scratches: continuous lines along the profile, caused by roll surface roughness, embedded debris, or a too-tight\u00a0<strong>\u0641\u062c\u0648\u0629 \u0627\u0644\u0623\u0633\u0637\u0648\u0627\u0646\u0629<\/strong>.<\/li><li>Marks: localized dents, pressure marks, or transfer marks, caused by coating pick-up, hard particles, or misaligned stands.<\/li><li>Galling: heavy metal-to-metal transfer where the strip welds onto the roll surface and tears on every pass.<\/li><\/ul><p>Each family needs a different fix. A\u00a0<a href=\"https:\/\/belirollforming.com\/ar\/%d9%81%d8%ad%d8%b5-%d8%aa%d8%b4%d9%83%d9%8a%d9%84-%d8%a7%d9%84%d9%84%d9%81%d8%a9\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u0641\u062d\u0635 \u062a\u0634\u0643\u064a\u0644 \u0627\u0644\u0644\u0641\u0629<\/a> routine catches all three early, before they hit the finished profile.<\/p><h2>Why Roll Forming Surface Scratch Defects Form<\/h2><p>Scratches form when a hard surface slides against the strip under pressure. The roll face is harder than the material, so the material loses the fight, a pattern documented by\u00a0<a href=\"https:\/\/www.thefabricator.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u0627\u0644\u0645\u064f\u0635\u0646\u0650\u0651\u0639<\/a>.<\/p><p>Four root causes drive nearly all surface damage:<\/p><ol><li>Rough or damaged roll surfaces. Worn rollers, grinding marks, or corrosion on the roll face act like sandpaper on the strip.<\/li><li><strong>Roller gap<\/strong>\u00a0set too tight. When the gap is smaller than actual material thickness, the rolls squeeze, thin, and scuff the surface.<\/li><li>Coating pick-up. Zinc, paint, or oxide builds up on the roll face and transfers as repeating marks.<\/li><li>Contaminated strip. Dust, scale, or metal fines between the strip and roll act as abrasive particles.<\/li><\/ol><p>Most lines show all four at once, which is why fixing one cause alone never clears the defect.<\/p><h2>The 6 Roller Polish and Gap Solutions<\/h2><h3>Solution 1: Polish Rolls to the Correct Surface Finish<\/h3><p>Roller polish quality is the single biggest factor in\u00a0<strong>\u062e\u062f\u0648\u0634 \u0623\u0633\u0637\u062d \u0627\u0644\u062a\u0634\u0643\u064a\u0644 \u0628\u0627\u0644\u0645\u062f\u0627\u062d\u0644<\/strong>\u00a0control. A rough roll face imprints its texture into every meter of strip.<\/p><p>Target an Ra of 0.2 to 0.4 micrometers for forming rolls that touch exposed surfaces. Finish idle and guide rolls to Ra 0.4 to 0.8 micrometers. Anything rougher than Ra 1.0 micrometers will scratch soft coatings.<\/p><p>Polish in the direction of strip travel, not across it. Cross-direction polish marks show up as repeating stripes on the profile. Use progressively finer compounds, ending at 600 to 1200 grit, then buff to the target Ra.<\/p><h3>Solution 2: Set the Roller Gap Below Nominal Thickness<\/h3><p><strong>Roller gap<\/strong>\u00a0is the space between the upper and lower rolls at each stand. Too wide and the profile loses shape; too tight and the strip thins and scratches.<\/p><p>For forming passes, start at nominal material thickness minus 0.10 to 0.20 millimeters on a new tooling set. Sizing and finishing passes run at nominal minus 0.00 to 0.05 millimeters. Guide passes stay at nominal plus 0.30 to 0.50 millimeters so the strip never touches the roll faces.<\/p><p>Measure actual coil thickness with a micrometer before setup, not the nominal certificate value. The full method is in the\u00a0<a href=\"https:\/\/belirollforming.com\/ar\/roll-forming-roller-gap-clearance-material-thickness-rules\/\" target=\"_blank\" rel=\"noopener noreferrer\">roller gap clearance guide<\/a>.<\/p><h3>Solution 3: Use Chrome-Plated or Coated Rollers<\/h3><p>Chrome plating changes how the roll surface behaves. Hard chrome at 850 to 1100 HV is about twice as hard as D2 tool steel at 58 to 62 HRC, so it resists abrasive wear longer.<\/p><p>Plate thickness of 20 to 30 micrometers gives the best balance. Thinner plating wears through quickly. Thicker plating chips at the edges.<\/p><p>For stainless steel and galvanized strip, consider PVD titanium nitride (TiN) coatings on top of chrome. TiN lowers friction to about 0.4 and reduces pick-up and galling, at 15 to 30 percent more cost than chrome alone. Coating selection guidance comes from\u00a0<a href=\"https:\/\/www.pma.org\/\" target=\"_blank\" rel=\"noopener noreferrer\">PMA<\/a>.<\/p><h3>Solution 4: Balance Roll Pressure Across the Flower Pattern<\/h3><p>Scratches often come from one overloaded stand, usually a breakdown pass carrying the highest load.<\/p><p>Check each stand for over-bending. Overload shows as edge thinning, a shiny stripe along the bend line, or exit flare. Reduce pressure and shift load to the next stand.<\/p><p>Correct\u00a0<a href=\"https:\/\/belirollforming.com\/ar\/%d8%aa%d8%b5%d9%85%d9%8a%d9%85-%d9%84%d9%81%d8%a7%d8%a6%d9%81-%d8%aa%d8%b4%d9%83%d9%8a%d9%84-%d8%a7%d9%84%d9%84%d9%81%d8%a7%d8%a6%d9%81\/\" target=\"_blank\" rel=\"noopener noreferrer\">pass design<\/a>\u00a0spreads the bend over 4 to 8 incremental stands instead of 1 or 2 heavy ones. If scratches appear after a die change, compare the flower pattern against the original drawings.<\/p><h3>Solution 5: Clean the Strip and Control Lubricant Film<\/h3><p>Dirt on the coil becomes scratches on the profile. A 10 micrometer dust particle trapped between the roll and strip is enough to score galvanized coating.<\/p><p>Install a strip cleaner or wiper ahead of the first stand. Brush or air-knife systems remove fines. For pre-painted coil, confirm the coating is fully cured before forming, because soft paint transfers onto the rolls and creates repeating mark defects.<\/p><p>Light lubrication helps on stainless and aluminum. Use a thin film of forming oil at 5 to 15 milliliters per square meter. Too much oil attracts dirt. Too little promotes galling.<\/p><h3>Solution 6: Schedule Re-Polishing and Gap Audits<\/h3><p>Roll surfaces wear every shift. A clean roll can start scratching after a coating change or a batch of dirty coil.<\/p><p>Schedule a re-polish every 2,000 to 3,000 operating hours, or every 6 months, whichever comes first. Audit\u00a0<strong>\u0641\u062c\u0648\u0629 \u0627\u0644\u0623\u0633\u0637\u0648\u0627\u0646\u0629<\/strong>\u00a0at the same interval with a feeler gauge or lead wire method. Check for coating pick-up after every coil change.<\/p><p>Track defect reports per shift. Log the stand number, coil batch, and roll face condition. That log turns random defects into a predictable maintenance trigger.<\/p><p><img decoding=\"async\" data-attachment-id=\"6731\" data-permalink=\"https:\/\/belirollforming.com\/ar\/roll-forming-surface-scratch\/roll-forming-surface-scratch-6-solutions-infographic\/\" data-orig-file=\"https:\/\/belirollforming.com\/wp-content\/uploads\/2026\/08\/roll-forming-surface-scratch-6-solutions-infographic.webp\" data-orig-size=\"1408,768\" data-comments-opened=\"1\" data-image-title=\"roll forming surface scratch 6 solutions infographic\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/belirollforming.com\/wp-content\/uploads\/2026\/08\/roll-forming-surface-scratch-6-solutions-infographic-1400x764.webp\" class=\"alignnone size-large wp-image-6731\" src=\"https:\/\/belirollforming.com\/wp-content\/uploads\/2026\/08\/roll-forming-surface-scratch-6-solutions-infographic-1400x764.webp\" alt=\"roll forming surface scratch 6 solutions infographic\" width=\"1290\" height=\"704\" srcset=\"https:\/\/belirollforming.com\/wp-content\/uploads\/2026\/08\/roll-forming-surface-scratch-6-solutions-infographic-1400x764.webp 1400w, https:\/\/belirollforming.com\/wp-content\/uploads\/2026\/08\/roll-forming-surface-scratch-6-solutions-infographic-600x327.webp 600w, https:\/\/belirollforming.com\/wp-content\/uploads\/2026\/08\/roll-forming-surface-scratch-6-solutions-infographic-768x419.webp 768w, https:\/\/belirollforming.com\/wp-content\/uploads\/2026\/08\/roll-forming-surface-scratch-6-solutions-infographic-18x10.webp 18w, https:\/\/belirollforming.com\/wp-content\/uploads\/2026\/08\/roll-forming-surface-scratch-6-solutions-infographic.webp 1408w\" sizes=\"(max-width: 1290px) 100vw, 1290px\"><\/p><h2>Defect Diagnosis Table<\/h2><p>Use this table to match the defect you see to the cause and the fix.<\/p><table><thead><tr><th>\u0639\u064a\u0628<\/th><th>Typical Cause<\/th><th>Quick Fix<\/th><\/tr><\/thead><tbody><tr><td>Continuous line scratch along strip<\/td><td>Rough roll face, embedded debris<\/td><td>Re-polish roll to Ra 0.2 to 0.4, clean rolls<\/td><\/tr><tr><td>Repeating mark every roll revolution<\/td><td>Coating pick-up or chip on roll<\/td><td>Remove pick-up, polish damaged spot<\/td><\/tr><tr><td>Edge thinning plus scuffing<\/td><td>Roller gap too tight at forming stand<\/td><td>Open gap to nominal minus 0.10 to 0.20 mm<\/td><\/tr><tr><td>Intermittent short scratches<\/td><td>Dirty coil, scale, or metal fines<\/td><td>Install strip cleaner, wipe rolls per shift<\/td><\/tr><tr><td>Heavy metal transfer, rough surface<\/td><td>Galling from high speed and dry contact<\/td><td>Chrome plate or TiN coat, add light oil film<\/td><\/tr><tr><td>White or grey haze on galvanized<\/td><td>Zinc dust on rolls or strip<\/td><td>Clean rolls, reduce speed below 60 m\/min<\/td><\/tr><\/tbody><\/table><h2>Roller Surface Finish Selection Table<\/h2><p>Pick the right finish before you order new tooling. The Ra value decides how the surface behaves.<\/p><table><thead><tr><th>\u0637\u0644\u0628<\/th><th>Target Ra<\/th><th>Polish Method<\/th><th>\u0645\u0644\u062d\u0648\u0638\u0627\u062a<\/th><\/tr><\/thead><tbody><tr><td>Exposed surfaces, pre-painted strip<\/td><td>0.2 to 0.4 \u00b5m<\/td><td>Polish to 600 to 1200 grit, buff<\/td><td>Lowest scratch risk<\/td><\/tr><tr><td>Guide and idle rolls<\/td><td>0.4 to 0.8 \u00b5m<\/td><td>Fine grinding, light polish<\/td><td>Guides without marking<\/td><\/tr><tr><td>Breakdown and forming rolls<\/td><td>0.4 to 0.6 \u00b5m<\/td><td>Ground, polished along travel<\/td><td>Balance grip and surface quality<\/td><\/tr><tr><td>Hard-to-form stainless, high strength<\/td><td>0.2 to 0.3 \u00b5m + chrome or TiN<\/td><td>Polish then plate<\/td><td>Prevents galling and pick-up<\/td><\/tr><tr><td>Non-contact back-up rolls<\/td><td>1.6 to 3.2 \u00b5m<\/td><td>As-machined<\/td><td>Roughness acceptable here<\/td><\/tr><\/tbody><\/table><p>Verify the finish with a portable profilometer, not by eye; a polished roll looks identical to a scratched one until measured, a point\u00a0<a href=\"https:\/\/www.metalformingmagazine.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">MetalForming Magazine<\/a>\u00a0makes in its tooling guidance.\u00a0<a href=\"https:\/\/belirollforming.com\/ar\/%d8%a7%d9%84%d8%b5%d9%8a%d8%a7%d9%86%d8%a9-%d8%a7%d9%84%d9%88%d9%82%d8%a7%d8%a6%d9%8a%d8%a9-%d9%84%d8%aa%d8%b4%d9%83%d9%8a%d9%84-%d8%a7%d9%84%d9%84%d9%81%d8%a7%d8%a6%d9%81\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u0627\u0644\u0635\u064a\u0627\u0646\u0629 \u0627\u0644\u0648\u0642\u0627\u0626\u064a\u0629 \u0644\u062a\u0634\u0643\u064a\u0644 \u0627\u0644\u0644\u0641\u0627\u0626\u0641<\/a> checks should include a surface finish reading on every audit.<\/p><h2>How to Diagnose a Roll Forming Surface Scratch in 5 Steps<\/h2><p>Follow this sequence when a scratch appears.<\/p><ol><li>Mark the defect location on the finished profile and measure its position across the profile width.<\/li><li>Map that position back to the forming stand. A scratch at 30 percent of profile width usually comes from a roll face at the same relative position.<\/li><li>Stop the line, lock out the power, and inspect the roll face at that spot with a magnifier. Look for grinding marks, chips, or pick-up.<\/li><li>Measure the\u00a0<strong>\u0641\u062c\u0648\u0629 \u0627\u0644\u0623\u0633\u0637\u0648\u0627\u0646\u0629<\/strong>\u00a0at that stand with a feeler gauge. Compare it against the setup sheet.<\/li><li>Fix the cause, run one test strip, and inspect before full production.<\/li><\/ol><p>Never sand a roll face while the line is powered. Follow lockout tagout (LOTO) procedures first. Safety comes before a cleaner profile.<\/p><h2>What Surface Defects Cost You<\/h2><p>Surface defects cost money three ways: direct scrap, rework labor, and customer returns. A rejected panel is material you already paid for, and a cosmetic scratch can reject an entire shipment of visible products.<\/p><p>On pre-painted lines, a scratch through the zinc layer on galvanized steel exposes bare steel to corrosion. Under\u00a0<a href=\"https:\/\/www.astm.org\/\" target=\"_blank\" rel=\"noopener noreferrer\">ASTM A653\/A653M<\/a>, the coating is the corrosion protection, and a deep scratch removes it locally, so the panel rusts from that line outward.<\/p><p>The math is simple: one 30 meter coil scratched at 40 percent reject rate wastes 12 meters of material plus the labor to handle it. Roller polish and gap maintenance costs a fraction of one rejected coil.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-02d9ff0 elementor-widget elementor-widget-heading\" data-id=\"02d9ff0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">\u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u0627\u0644\u0634\u0627\u0626\u0639\u0629<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2f4a122 elementor-widget elementor-widget-eael-adv-accordion\" data-id=\"2f4a122\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"eael-adv-accordion.default\">\n\t\t\t\t\t            <div class=\"eael-adv-accordion\" id=\"eael-adv-accordion-2f4a122\" data-scroll-on-click=\"no\" data-scroll-speed=\"300\" data-accordion-id=\"2f4a122\" data-accordion-type=\"accordion\" data-toogle-speed=\"300\">\n            <div class=\"eael-accordion-list\">\n\t\t\t\t\t<div id=\"what-causes-scratches-on-roll-formed-steel\" class=\"elementor-tab-title eael-accordion-header\" tabindex=\"0\" data-tab=\"1\" aria-controls=\"elementor-tab-content-4951\"><span class=\"eael-advanced-accordion-icon-closed\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-advanced-accordion-icon-opened\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-accordion-tab-title\">\u0645\u0627 \u0627\u0644\u0630\u064a \u064a\u062a\u0633\u0628\u0628 \u0641\u064a \u0638\u0647\u0648\u0631 \u0627\u0644\u062e\u062f\u0648\u0634 \u0639\u0644\u0649 \u0627\u0644\u0641\u0648\u0644\u0627\u0630 \u0627\u0644\u0645\u0634\u0643\u0644 \u0628\u0627\u0644\u0644\u0641\u061f<\/span><svg aria-hidden=\"true\" class=\"fa-toggle e-font-icon-svg e-fas-angle-right\" viewbox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/div><div id=\"elementor-tab-content-4951\" class=\"eael-accordion-content clearfix\" data-tab=\"1\" aria-labelledby=\"what-causes-scratches-on-roll-formed-steel\"><p>\u062a\u0646\u062a\u062c \u0627\u0644\u062e\u062f\u0648\u0634 \u0627\u0644\u0645\u0648\u062c\u0648\u062f\u0629 \u0639\u0644\u0649 \u0627\u0644\u0641\u0648\u0644\u0627\u0630 \u0627\u0644\u0645\u0634\u0643\u0644 \u0628\u0627\u0644\u062f\u0631\u0641\u0644\u0629 \u0639\u0646 \u062e\u0634\u0648\u0646\u0629 \u0623\u0633\u0637\u062d \u0627\u0644\u0623\u0633\u0637\u0648\u0627\u0646\u0627\u062a\u060c \u0648\u0636\u064a\u064a\u0642\u00a0<strong>\u0641\u062c\u0648\u0629 \u0627\u0644\u0623\u0633\u0637\u0648\u0627\u0646\u0629<\/strong>, \u060c \u0623\u0648 \u0627\u0644\u062a\u0635\u0627\u0642 \u0627\u0644\u0637\u0644\u0627\u0621\u060c \u0623\u0648 \u0627\u0644\u0645\u0644\u0641 \u0627\u0644\u0645\u0644\u0648\u062b. \u0648\u062a\u064f\u0639\u0632\u0649 \u0645\u0639\u0638\u0645 \u0627\u0644\u062d\u0627\u0644\u0627\u062a \u0625\u0644\u0649 \u062e\u0634\u0648\u0646\u0629 \u0623\u0633\u0637\u062d \u0627\u0644\u0623\u0633\u0637\u0648\u0627\u0646\u0627\u062a \u0648\u0636\u064a\u0642 \u0627\u0644\u0641\u062c\u0648\u0627\u062a\u060c \u0644\u0630\u0627 \u064a\u062c\u0628 \u0635\u0642\u0644 \u0627\u0644\u0623\u0633\u0637\u0648\u0627\u0646\u0627\u062a \u0648\u0625\u0639\u0627\u062f\u0629 \u0641\u062d\u0635 \u0627\u0644\u0641\u062c\u0648\u0629 \u0623\u0648\u0644\u0627\u064b.<\/p><\/div>\n\t\t\t\t\t<\/div><div class=\"eael-accordion-list\">\n\t\t\t\t\t<div id=\"how-do-you-remove-scratches-from-roll-forming\" class=\"elementor-tab-title eael-accordion-header\" tabindex=\"0\" data-tab=\"2\" aria-controls=\"elementor-tab-content-4952\"><span class=\"eael-advanced-accordion-icon-closed\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-advanced-accordion-icon-opened\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-accordion-tab-title\">\u0643\u064a\u0641 \u064a\u0645\u0643\u0646 \u0625\u0632\u0627\u0644\u0629 \u0627\u0644\u062e\u062f\u0648\u0634 \u0627\u0644\u0646\u0627\u062a\u062c\u0629 \u0639\u0646 \u0639\u0645\u0644\u064a\u0629 \u0627\u0644\u062a\u0634\u0643\u064a\u0644 \u0628\u0627\u0644\u0644\u0641\u061f<\/span><svg aria-hidden=\"true\" class=\"fa-toggle e-font-icon-svg e-fas-angle-right\" viewbox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/div><div id=\"elementor-tab-content-4952\" class=\"eael-accordion-content clearfix\" data-tab=\"2\" aria-labelledby=\"how-do-you-remove-scratches-from-roll-forming\"><p>\u064a\u0645\u0643\u0646 \u0625\u0632\u0627\u0644\u0629 \u0627\u0644\u062e\u062f\u0648\u0634 \u0639\u0646 \u0637\u0631\u064a\u0642 \u062a\u0644\u0645\u064a\u0639 \u0627\u0644\u0623\u0633\u0637\u0648\u0627\u0646\u0629 \u0627\u0644\u0645\u062a\u0636\u0631\u0631\u0629 \u062d\u062a\u0649 \u062a\u0635\u0644 \u062e\u0634\u0648\u0646\u0629 \u0627\u0644\u0633\u0637\u062d (Ra) \u0625\u0644\u0649 0.2 \u0625\u0644\u0649 0.4 \u0645\u064a\u0643\u0631\u0648\u0645\u062a\u0631\u060c \u0648\u062a\u0646\u0638\u064a\u0641 \u0633\u0637\u062d \u0627\u0644\u0623\u0633\u0637\u0648\u0627\u0646\u0629\u060c \u0648\u0625\u0639\u0627\u062f\u0629 \u0636\u0628\u0637\u00a0<strong>\u0641\u062c\u0648\u0629 \u0627\u0644\u0623\u0633\u0637\u0648\u0627\u0646\u0629<\/strong>. \u062b\u0645 \u0642\u0645 \u0628\u0625\u062c\u0631\u0627\u0621 \u0627\u062e\u062a\u0628\u0627\u0631 \u0628\u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0634\u0631\u064a\u0637 \u0627\u0644\u0627\u062e\u062a\u0628\u0627\u0631 \u0648\u0641\u062d\u0635\u0647 \u0642\u0628\u0644 \u0627\u0633\u062a\u0626\u0646\u0627\u0641 \u0627\u0644\u0625\u0646\u062a\u0627\u062c.<\/p><\/div>\n\t\t\t\t\t<\/div><div class=\"eael-accordion-list\">\n\t\t\t\t\t<div id=\"what-roller-gap-should-i-set-for-a-15-mm-sheet\" class=\"elementor-tab-title eael-accordion-header\" tabindex=\"0\" data-tab=\"3\" aria-controls=\"elementor-tab-content-4953\"><span class=\"eael-advanced-accordion-icon-closed\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-advanced-accordion-icon-opened\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-accordion-tab-title\">\u0645\u0627 \u0647\u064a \u0627\u0644\u0641\u062c\u0648\u0629 \u0627\u0644\u062a\u064a \u064a\u062c\u0628 \u0623\u0646 \u0623\u0636\u0628\u0637\u0647\u0627 \u0628\u064a\u0646 \u0627\u0644\u0623\u0633\u0637\u0648\u0627\u0646\u0627\u062a \u0644\u0635\u0641\u0627\u0626\u062d \u0628\u0633\u0645\u0627\u0643\u0629 1.5 \u0645\u0644\u0645\u061f<\/span><svg aria-hidden=\"true\" class=\"fa-toggle e-font-icon-svg e-fas-angle-right\" viewbox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/div><div id=\"elementor-tab-content-4953\" class=\"eael-accordion-content clearfix\" data-tab=\"3\" aria-labelledby=\"what-roller-gap-should-i-set-for-a-15-mm-sheet\"><p>\u0627\u0636\u0628\u0637\u00a0<strong>\u0641\u062c\u0648\u0629 \u0627\u0644\u0623\u0633\u0637\u0648\u0627\u0646\u0629<\/strong>\u00a0\u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u0644\u0635\u0641\u0627\u0626\u062d \u0627\u0644\u062a\u064a \u064a\u0628\u0644\u063a \u0633\u0645\u0643\u0647\u0627 1.5 \u0645\u0645\u060c \u064a\u062a\u0631\u0627\u0648\u062d \u0633\u0645\u0643\u0647\u0627 \u0641\u064a \u0645\u0631\u0627\u062d\u0644 \u0627\u0644\u062a\u0634\u0643\u064a\u0644 \u0628\u064a\u0646 1.30 \u06481.40 \u0645\u0645\u060c \u0645\u0642\u0627\u0631\u0646\u0629\u064b \u0628\u0627\u0644\u0633\u0645\u0643 \u0627\u0644\u0641\u0639\u0644\u064a \u0644\u0644\u0645\u0644\u0641. \u0623\u0645\u0627 \u0645\u0631\u0627\u062d\u0644 \u062a\u062d\u062f\u064a\u062f \u0627\u0644\u062d\u062c\u0645 \u0641\u062a\u062a\u0631\u0627\u0648\u062d \u0628\u064a\u0646 1.45 \u06481.50 \u0645\u0645\u060c \u0648\u0645\u0631\u0627\u062d\u0644 \u0627\u0644\u062a\u0648\u062c\u064a\u0647 \u0628\u064a\u0646 1.80 \u06482.00 \u0645\u0645.<\/p><\/div>\n\t\t\t\t\t<\/div><div class=\"eael-accordion-list\">\n\t\t\t\t\t<div id=\"what-is-the-best-roller-surface-finish-for-roll-forming\" class=\"elementor-tab-title eael-accordion-header\" tabindex=\"0\" data-tab=\"4\" aria-controls=\"elementor-tab-content-4954\"><span class=\"eael-advanced-accordion-icon-closed\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-advanced-accordion-icon-opened\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-accordion-tab-title\">\u0645\u0627 \u0647\u0648 \u0623\u0641\u0636\u0644 \u0646\u0648\u0639 \u0645\u0646 \u0627\u0644\u062a\u0634\u0637\u064a\u0628 \u0627\u0644\u0633\u0637\u062d\u064a \u0644\u0644\u0623\u0633\u0637\u0648\u0627\u0646\u0627\u062a \u0627\u0644\u0645\u0633\u062a\u062e\u062f\u0645\u0629 \u0641\u064a \u0627\u0644\u062a\u0634\u0643\u064a\u0644 \u0628\u0627\u0644\u062f\u0631\u0641\u0644\u0629\u061f<\/span><svg aria-hidden=\"true\" class=\"fa-toggle e-font-icon-svg e-fas-angle-right\" viewbox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/div><div id=\"elementor-tab-content-4954\" class=\"eael-accordion-content clearfix\" data-tab=\"4\" aria-labelledby=\"what-is-the-best-roller-surface-finish-for-roll-forming\"><p>\u0623\u0641\u0636\u0644 \u062f\u0631\u062c\u0629 \u0646\u0639\u0648\u0645\u0629 \u0644\u0633\u0637\u062d \u0627\u0644\u0623\u0633\u0637\u0648\u0627\u0646\u0627\u062a \u0627\u0644\u0645\u0633\u062a\u062e\u062f\u0645\u0629 \u0641\u064a \u0627\u0644\u062a\u0634\u0643\u064a\u0644 \u0628\u0627\u0644\u062f\u0631\u0641\u0644\u0629 \u0647\u064a Ra \u0645\u0646 0.2 \u0625\u0644\u0649 0.4 \u0645\u064a\u0643\u0631\u0648\u0645\u062a\u0631 \u0639\u0644\u0649 \u0627\u0644\u0623\u0633\u0637\u0648\u0627\u0646\u0627\u062a \u0627\u0644\u062a\u064a \u062a\u0644\u0627\u0645\u0633 \u0627\u0644\u0623\u0633\u0637\u062d \u0627\u0644\u0645\u0643\u0634\u0648\u0641\u0629. \u0641\u0627\u0644\u0633\u0637\u0648\u062d \u0627\u0644\u0623\u0643\u062b\u0631 \u062e\u0634\u0648\u0646\u0629 \u062a\u062a\u0631\u0643 \u0622\u062b\u0627\u0631\u064b\u0627 \u0628\u0627\u0631\u0632\u0629\u061b \u0623\u0645\u0627 \u0627\u0644\u0633\u0637\u0648\u062d \u0627\u0644\u0623\u0643\u062b\u0631 \u0646\u0639\u0648\u0645\u0629 \u0641\u062a\u0632\u064a\u062f \u0627\u0644\u062a\u0643\u0644\u0641\u0629 \u062f\u0648\u0646 \u062a\u062d\u0633\u064a\u0646 \u0627\u0644\u062c\u0648\u062f\u0629.<\/p><\/div>\n\t\t\t\t\t<\/div><div class=\"eael-accordion-list\">\n\t\t\t\t\t<div id=\"why-does-galvanized-steel-scratch-more-than-cold-rolled-steel\" class=\"elementor-tab-title eael-accordion-header\" tabindex=\"0\" data-tab=\"5\" aria-controls=\"elementor-tab-content-4955\"><span class=\"eael-advanced-accordion-icon-closed\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-advanced-accordion-icon-opened\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-accordion-tab-title\">\u0644\u0645\u0627\u0630\u0627 \u064a\u062a\u0639\u0631\u0636 \u0627\u0644\u0641\u0648\u0644\u0627\u0630 \u0627\u0644\u0645\u062c\u0644\u0641\u0646 \u0644\u0644\u062e\u062f\u0634 \u0623\u0643\u062b\u0631 \u0645\u0646 \u0627\u0644\u0641\u0648\u0644\u0627\u0630 \u0627\u0644\u0645\u062f\u0644\u0641\u0646 \u0639\u0644\u0649 \u0627\u0644\u0628\u0627\u0631\u062f\u061f<\/span><svg aria-hidden=\"true\" class=\"fa-toggle e-font-icon-svg e-fas-angle-right\" viewbox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/div><div id=\"elementor-tab-content-4955\" class=\"eael-accordion-content clearfix\" data-tab=\"5\" aria-labelledby=\"why-does-galvanized-steel-scratch-more-than-cold-rolled-steel\"><p>Galvanized steel scratches more because the zinc coating is soft and transfers onto roll faces as pick-up. The coating also contains hard intermetallic particles that act like abrasive grit.<\/p><\/div>\n\t\t\t\t\t<\/div><div class=\"eael-accordion-list\">\n\t\t\t\t\t<div id=\"how-often-should-forming-rolls-be-re-polished\" class=\"elementor-tab-title eael-accordion-header\" tabindex=\"0\" data-tab=\"6\" aria-controls=\"elementor-tab-content-4956\"><span class=\"eael-advanced-accordion-icon-closed\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-advanced-accordion-icon-opened\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-accordion-tab-title\">How often should forming rolls be re-polished?<\/span><svg aria-hidden=\"true\" class=\"fa-toggle e-font-icon-svg e-fas-angle-right\" viewbox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/div><div id=\"elementor-tab-content-4956\" class=\"eael-accordion-content clearfix\" data-tab=\"6\" aria-labelledby=\"how-often-should-forming-rolls-be-re-polished\"><p>Forming rolls should be re-polished every 2,000 to 3,000 operating hours, or every 6 months, whichever comes first. Cut that interval in half for dirty coil, stainless steel, or high strength material.<\/p><\/div>\n\t\t\t\t\t<\/div><div class=\"eael-accordion-list\">\n\t\t\t\t\t<div id=\"can-scratches-be-fixed-without-re-polishing-the-rolls\" class=\"elementor-tab-title eael-accordion-header\" tabindex=\"0\" data-tab=\"7\" aria-controls=\"elementor-tab-content-4957\"><span class=\"eael-advanced-accordion-icon-closed\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-advanced-accordion-icon-opened\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-accordion-tab-title\">Can scratches be fixed without re-polishing the rolls?<\/span><svg aria-hidden=\"true\" class=\"fa-toggle e-font-icon-svg e-fas-angle-right\" viewbox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/div><div id=\"elementor-tab-content-4957\" class=\"eael-accordion-content clearfix\" data-tab=\"7\" aria-labelledby=\"can-scratches-be-fixed-without-re-polishing-the-rolls\"><p>Scratches can sometimes be fixed without re-polishing if the cause is pick-up, debris, or a tight\u00a0<strong>\u0641\u062c\u0648\u0629 \u0627\u0644\u0623\u0633\u0637\u0648\u0627\u0646\u0629<\/strong>. Clean the roll face and open the gap. Deep roll damage still requires re-polishing.<\/p><\/div>\n\t\t\t\t\t<\/div><div class=\"eael-accordion-list\">\n\t\t\t\t\t<div id=\"what-is-galling-in-roll-forming\" class=\"elementor-tab-title eael-accordion-header\" tabindex=\"0\" data-tab=\"8\" aria-controls=\"elementor-tab-content-4958\"><span class=\"eael-advanced-accordion-icon-closed\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-advanced-accordion-icon-opened\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-accordion-tab-title\">What is galling in roll forming?<\/span><svg aria-hidden=\"true\" class=\"fa-toggle e-font-icon-svg e-fas-angle-right\" viewbox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/div><div id=\"elementor-tab-content-4958\" class=\"eael-accordion-content clearfix\" data-tab=\"8\" aria-labelledby=\"what-is-galling-in-roll-forming\"><p>Galling in roll forming is metal-to-metal transfer where the strip welds onto the roll surface and tears away on every pass. It is most common on stainless steel at high line speeds.<\/p><\/div>\n\t\t\t\t\t<\/div><div class=\"eael-accordion-list\">\n\t\t\t\t\t<div id=\"does-chrome-plating-prevent-roll-forming-scratches\" class=\"elementor-tab-title eael-accordion-header\" tabindex=\"0\" data-tab=\"9\" aria-controls=\"elementor-tab-content-4959\"><span class=\"eael-advanced-accordion-icon-closed\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-advanced-accordion-icon-opened\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-accordion-tab-title\">Does chrome plating prevent roll forming scratches?<\/span><svg aria-hidden=\"true\" class=\"fa-toggle e-font-icon-svg e-fas-angle-right\" viewbox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/div><div id=\"elementor-tab-content-4959\" class=\"eael-accordion-content clearfix\" data-tab=\"9\" aria-labelledby=\"does-chrome-plating-prevent-roll-forming-scratches\"><p>Chrome plating reduces\u00a0<strong>\u062e\u062f\u0648\u0634 \u0623\u0633\u0637\u062d \u0627\u0644\u062a\u0634\u0643\u064a\u0644 \u0628\u0627\u0644\u0645\u062f\u0627\u062d\u0644<\/strong>\u00a0risk by hardening the roll face to 850 to 1100 HV, but it does not eliminate them. Plating still scratches if the\u00a0<strong>\u0641\u062c\u0648\u0629 \u0627\u0644\u0623\u0633\u0637\u0648\u0627\u0646\u0629<\/strong>\u00a0is too tight or the strip is dirty.<\/p><\/div>\n\t\t\t\t\t<\/div><div class=\"eael-accordion-list\">\n\t\t\t\t\t<div id=\"how-do-i-check-roller-gap-on-an-existing-line\" class=\"elementor-tab-title eael-accordion-header\" tabindex=\"0\" data-tab=\"10\" aria-controls=\"elementor-tab-content-49510\"><span class=\"eael-advanced-accordion-icon-closed\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-advanced-accordion-icon-opened\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-accordion-tab-title\">How do I check roller gap on an existing line?<\/span><svg aria-hidden=\"true\" class=\"fa-toggle e-font-icon-svg e-fas-angle-right\" viewbox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/div><div id=\"elementor-tab-content-49510\" class=\"eael-accordion-content clearfix\" data-tab=\"10\" aria-labelledby=\"how-do-i-check-roller-gap-on-an-existing-line\"><p>Stop production, lock out the power, and insert a feeler gauge between the closed rolls at each stand. Compare the reading against the setup sheet, and adjust in 0.05 mm steps.<\/p><\/div>\n\t\t\t\t\t<\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e123cd2 elementor-widget elementor-widget-text-editor\" data-id=\"e123cd2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>\u0627\u0644\u062e\u0644\u0627\u0635\u0629<\/h2><p><strong>Roll forming surface scratch<\/strong>\u00a0and mark defects are preventable. Rough rolls and wrong gaps cause most of them, and both are fixable in one maintenance shift.<\/p><p>Polish forming rolls to Ra 0.2 to 0.4 micrometers, set the\u00a0<strong>\u0641\u062c\u0648\u0629 \u0627\u0644\u0623\u0633\u0637\u0648\u0627\u0646\u0629<\/strong>\u00a0from actual coil thickness, and add chrome or TiN coatings where pick-up is a problem. Schedule re-polishing every 2,000 to 3,000 hours and audit gaps at the same time.<\/p><p>Beli Rollforming builds custom roll forming machines with D2 rollers and chrome-plated options for scratch-sensitive profiles. Send us your profile drawing and material grade for the right roller polish and gap setup.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d705a02 elementor-widget elementor-widget-text-editor\" data-id=\"d705a02\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>\u0633\u062c\u0644 \u062a\u0639\u062f\u064a\u0644\u0627\u062a \u0627\u0644\u0645\u0642\u0627\u0644<\/h2><ul><li><strong>2026-08-17:<\/strong> Initial publication. Added 6 roller polish and gap solutions, defect diagnosis table, surface finish selection table, and 10 direct-answer FAQs.<\/li><\/ul><h2>\u0645\u062d\u0641\u0632\u0627\u062a \u0627\u0644\u0645\u0631\u0627\u062c\u0639\u0629 \u0627\u0644\u0642\u0627\u062f\u0645\u0629<\/h2><ul><li>A new coating technology for roll surfaces (TiN, DLC, ceramic) reaches wide industrial use.<\/li><li>ASTM A653 or related coating standards are updated.<\/li><li>A reader reports a defect type not covered in the diagnosis table.<\/li><li>New field data changes the recommended re-polishing interval.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Introduction Roll forming surface scratch\u00a0defects are the most common quality rejection on a cold forming line. A single deep scratch can send a whole panel to scrap. With 20 to 40 percent of defects in rolled products traced to surface damage, the cost adds up fast. Most scratches are not random. They come from two [&hellip;]<\/p>\n","protected":false},"author":136317769,"featured_media":6730,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_wpcom_ai_launchpad_first_post":false,"_jetpack_hide_featured_image":false,"_jetpack_featured_image_duplicate_dismissed":0,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"{title}\n\n{excerpt}\n\n{url}","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"_wpas_customize_per_network":false,"jetpack_post_was_ever_published":false},"categories":[1414,1467],"tags":[3629,3632,3634,3625,3628,1922,3626,3631,1932,3624,3627,3633,3630,2171],"class_list":["post-6723","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technology","category-maintenance","tag-chrome-plated-rolls","tag-coil-surface-quality","tag-d2-rollers","tag-galling","tag-ra-surface-finish","tag-roll-forming-maintenance","tag-roll-forming-surface-defects","tag-roll-forming-surface-scratch","tag-roll-forming-tooling","tag-roller-gap","tag-roller-polish","tag-scratch-prevention","tag-surface-marks-on-roll-formed-steel","tag-tooling-wear"],"blocksy_meta":[],"jetpack_publicize_connections":[],"jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/pgM2Nx-1Kr","jetpack-related-posts":[],"jetpack_featured_media_url":"https:\/\/belirollforming.com\/wp-content\/uploads\/2026\/08\/polished-chrome-rollers-roll-forming.webp","_links":{"self":[{"href":"https:\/\/belirollforming.com\/ar\/wp-json\/wp\/v2\/posts\/6723","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/belirollforming.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/belirollforming.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/belirollforming.com\/ar\/wp-json\/wp\/v2\/users\/136317769"}],"replies":[{"embeddable":true,"href":"https:\/\/belirollforming.com\/ar\/wp-json\/wp\/v2\/comments?post=6723"}],"version-history":[{"count":8,"href":"https:\/\/belirollforming.com\/ar\/wp-json\/wp\/v2\/posts\/6723\/revisions"}],"predecessor-version":[{"id":6734,"href":"https:\/\/belirollforming.com\/ar\/wp-json\/wp\/v2\/posts\/6723\/revisions\/6734"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/belirollforming.com\/ar\/wp-json\/wp\/v2\/media\/6730"}],"wp:attachment":[{"href":"https:\/\/belirollforming.com\/ar\/wp-json\/wp\/v2\/media?parent=6723"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/belirollforming.com\/ar\/wp-json\/wp\/v2\/categories?post=6723"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/belirollforming.com\/ar\/wp-json\/wp\/v2\/tags?post=6723"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}