{"id":8113,"date":"2015-08-03T21:05:33","date_gmt":"2015-08-03T21:05:33","guid":{"rendered":"https:\/\/www.mate.com\/cs\/technical-resources\/tips-techniques\/materials\/"},"modified":"2015-08-03T21:05:33","modified_gmt":"2015-08-03T21:05:33","slug":"materials","status":"publish","type":"page","link":"https:\/\/www.mate.com\/cs\/technical-resources\/punch-press-resources\/tips-techniques\/materials\/","title":{"rendered":"Materials"},"content":{"rendered":"<h2>What Constitutes &#8222;Normal&#8220; Sheet Metal?<\/h2>\n<p><strong>Thickness<\/strong>: 0.030-0.130(0.80-3.30)<br \/>\n<strong>Shear strength<\/strong>:\u00a0 25,000-75,000 psi (0.172-0.157 kN\/mm2)<\/p>\n<p>Normal sheet metal will provide the most trouble-free operation and longest tool life. Material that is not in the normal range but still within the capacity of the punch press may require special tools, high lubrication, multiple hits and\/or other procedures to produce a satisfactory job. Call Mate customer service for suggestions.<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/www.mate.com\/wp-content\/uploads\/2015\/08\/Sheetmetal_Bell_Curve-e1444666823797.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1493 size-full\" src=\"https:\/\/www.mate.com\/wp-content\/uploads\/2015\/08\/Sheetmetal_Bell_Curve-e1444666823797.jpg\" alt=\"Sheetmetal_Bell_Curve\" width=\"450\" height=\"202\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<h2>Combating Material Warpage<\/h2>\n<p>If you\u2019re punching a large number of holes in a sheet and the sheet does not stay flat, it could be caused by the cumulative effect of punching. Each time a hole is punched, material surrounding the hole is stretched downward, placing the top of the sheet in tension. The downward movement causes a corresponding compression at the bottom of the sheet. For a few holes, the effect is insignificant, but as the number of holes increases the tension and compression can multiply to the point where the sheet deforms.<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/www.mate.com\/wp-content\/uploads\/2015\/08\/Metal_warpage-e1444666862998.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1494 size-full\" src=\"https:\/\/www.mate.com\/wp-content\/uploads\/2015\/08\/Metal_warpage-e1444666862998.jpg\" alt=\"Metal_warpage\" width=\"450\" height=\"332\" \/><\/a><\/p>\n<p>One way to counteract this effect is to punch every other hole first and then come back and punch the remaining holes.\u00a0 This places the same amount of force on the sheet, but it disrupts\u00a0 tension\/compression accumulation that occurs when punching operations follow one another in close succession and in the same direction. It also allows the first set of holes to absorb some of the distorting effect of the second set.<\/p>\n<ul class=\"list-pages-shortcode child-pages\"><li class=\"page_item page-item-8114\"><a href=\"https:\/\/www.mate.com\/cs\/technical-resources\/punch-press-resources\/tips-techniques\/materials\/punching-different-materials\/\">Punching Different Materials<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>What Constitutes &#8222;Normal&#8220; Sheet Metal? Thickness: 0.030-0.130(0.80-3.30) Shear strength:\u00a0 25,000-75,000 psi (0.172-0.157 kN\/mm2) Normal sheet metal will provide the most trouble-free operation and longest tool life. Material that is not in the normal range but still within the capacity of the punch press may require special tools, high lubrication, multiple hits and\/or other procedures to [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":8111,"menu_order":660,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-8113","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.6 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Materials - Mate Precision Technologies<\/title>\n<meta name=\"description\" content=\"What Constitutes &quot;Normal&quot; Sheet Metal? Thickness: 0.030-0.130(0.80-3.30) Shear strength:\u00a0 25,000-75,000 psi (0.172-0.157 kN\/mm2) Normal sheet metal will\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.mate.com\/cs\/technical-resources\/punch-press-resources\/tips-techniques\/materials\/\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Materials\" \/>\n<meta property=\"og:description\" content=\"What Constitutes &quot;Normal&quot; Sheet Metal? Thickness: 0.030-0.130(0.80-3.30) Shear strength:\u00a0 25,000-75,000 psi (0.172-0.157 kN\/mm2) Normal sheet metal will\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.mate.com\/cs\/technical-resources\/punch-press-resources\/tips-techniques\/materials\/\" \/>\n<meta property=\"og:site_name\" content=\"Mate Precision Technologies\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/MatePrecisionTechnologies\/\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.mate.com\/wp-content\/uploads\/2015\/08\/Sheetmetal_Bell_Curve-e1444666823797.jpg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@mateprecision\" \/>\n<meta name=\"twitter:label1\" content=\"Odhadovan\u00e1 doba \u010dten\u00ed\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minuta\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.mate.com\\\/cs\\\/technical-resources\\\/punch-press-resources\\\/tips-techniques\\\/materials\\\/\",\"url\":\"https:\\\/\\\/www.mate.com\\\/cs\\\/technical-resources\\\/punch-press-resources\\\/tips-techniques\\\/materials\\\/\",\"name\":\"Materials - Mate Precision Technologies\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.mate.com\\\/cs\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.mate.com\\\/cs\\\/technical-resources\\\/punch-press-resources\\\/tips-techniques\\\/materials\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.mate.com\\\/cs\\\/technical-resources\\\/punch-press-resources\\\/tips-techniques\\\/materials\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.mate.com\\\/wp-content\\\/uploads\\\/2015\\\/08\\\/Sheetmetal_Bell_Curve-e1444666823797.jpg\",\"datePublished\":\"2015-08-03T21:05:33+00:00\",\"description\":\"What Constitutes \\\"Normal\\\" Sheet Metal? 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