{"id":19251,"date":"2025-03-10T17:30:27","date_gmt":"2025-03-10T09:30:27","guid":{"rendered":"https:\/\/www.cttechth.com\/?p=19251"},"modified":"2025-03-08T16:16:11","modified_gmt":"2025-03-08T08:16:11","slug":"sheet-metal-tech-guide","status":"publish","type":"post","link":"https:\/\/www.cttechth.com\/en\/sheet-metal-tech-guide\/","title":{"rendered":"Sheet Metal Tech Guide: Precision Techniques for Auto Chassis &#038; Panels"},"content":{"rendered":"<p><span data-font-family=\"default\">In the automotive manufacturing industry, the precision of each component directly affects the safety and durability of the entire vehicle. As the key supporting components of the automotive structure, the manufacturing process of the chassis and body skin is of paramount importance. This article will deeply analyze the core technologies of automotive chassis sheet metal processing and automotive skin manufacturing, and reveal how to create high-reliability automotive components through sheet metal manufacturing processes.<\/span><\/p>\n<p><strong><span style=\"font-size: 20px;\">Sheet metal processing: the &#8220;skeleton&#8221; and &#8220;skin&#8221; of the automotive manufacturing industry<\/span><\/strong><\/p>\n<p><span data-font-family=\"default\">The chassis and skin of the automobile are like the bones and skin of the human body &#8211; the chassis carries the weight of the power system and the body, and the skin resists external impact and corrosion. According to statistics, about 30% of the parts in a passenger car rely on sheet metal forming technology, while the proportion of commercial vehicles (such as buses) is as high as 45%.<\/span><\/p>\n<p><span data-font-family=\"default\">Taking bus chassis processing as an example, it needs to meet three core requirements:<\/span><\/p>\n<ul>\n<li><span data-font-family=\"default\">High strength: carrying the weight of dozens of passengers and equipment, and extremely high fatigue resistance requirements;<\/span><\/li>\n<li><span data-font-family=\"default\">Lightweight: every 10% weight reduction can reduce energy consumption by 6%-8%;<\/span><\/li>\n<li><span data-font-family=\"default\">Weather resistance: to cope with complex road conditions and extreme temperature and humidity environments.<\/span><\/li>\n<\/ul>\n<p><span data-font-family=\"default\">Chassis components manufactured through precision sheet metal processing can achieve both structural strength and lightweight design. For example, a certain brand of electric bus uses a high-strength steel laser welded chassis, which reduces the overall weight by 18% and increases the driving range by 22%.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-19253 size-full\" title=\"Sheet Metal Processing\" src=\"https:\/\/www.cttechth.com\/wp-content\/uploads\/2025\/03\/AA9-1.jpg\" alt=\"\" width=\"900\" height=\"600\" srcset=\"https:\/\/www.cttechth.com\/wp-content\/uploads\/2025\/03\/AA9-1.jpg 900w, https:\/\/www.cttechth.com\/wp-content\/uploads\/2025\/03\/AA9-1-768x512.jpg 768w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/p>\n<p><strong><span style=\"font-size: 20px;\">Analysis of the entire process of automobile chassis sheet metal processing<\/span><\/strong><\/p>\n<p><strong>A qualified automobile chassis needs to go through four key processes:<\/strong><\/p>\n<ul>\n<li>Laser cutting: &#8220;Surgery&#8221; with an accuracy of \u00b10.1mm<\/li>\n<li><span data-font-family=\"default\">Using a 6000W fiber laser cutting machine, it can process 4mm-20mm thick steel plates;<\/span><\/li>\n<li><span data-font-family=\"default\">The intelligent typesetting system increases the material utilization rate to 92%;<\/span><\/li>\n<li>CNC bending: Mechanical optimization with an angle error of less than 0.5\u00b0<\/li>\n<\/ul>\n<p><strong>Equipped with an 800-ton electro-hydraulic servo bending machine, it supports U-shaped\/L-shaped complex structure forming;<\/strong><\/p>\n<ul>\n<li><span data-font-family=\"default\">Through finite element analysis (FEA) simulation of stress distribution to avoid bending cracking;<\/span><\/li>\n<li><span data-font-family=\"default\">Technology highlights: The C-beam of the bus chassis is bent and formed in one step, reducing welding nodes by 30%.<\/span><\/li>\n<\/ul>\n<p><strong><span style=\"font-size: 20px;\">Sheet metal welding: precise welds<\/span><\/strong><\/p>\n<ul>\n<li><span data-font-family=\"default\">Use welding robot arm, repeat positioning accuracy \u00b10.08mm;<\/span><\/li>\n<li><span data-font-family=\"default\">Use MAG welding process, penetration depth reaches 1.2 times of plate thickness;<\/span><\/li>\n<\/ul>\n<p><strong>Surface treatment: double protection to extend service life<\/strong><\/p>\n<ul>\n<li><span data-font-family=\"default\">Electrophoretic primer + powder spraying, salt spray resistance test over 1000 hours;<\/span><\/li>\n<li><span data-font-family=\"default\">Partial Dacromet coating is used, rust prevention ability is increased by 5 times;<\/span><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-19254 size-full\" title=\"Sheet Metal Processing\" src=\"https:\/\/www.cttechth.com\/wp-content\/uploads\/2025\/03\/AA9-2.jpg\" alt=\"\" width=\"900\" height=\"600\" srcset=\"https:\/\/www.cttechth.com\/wp-content\/uploads\/2025\/03\/AA9-2.jpg 900w, https:\/\/www.cttechth.com\/wp-content\/uploads\/2025\/03\/AA9-2-768x512.jpg 768w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/p>\n<p><strong><span style=\"font-size: 20px;\" data-font-family=\"default\">Automobile skin processing: the art of balancing 0.01mm level precision and corrosion resistance<\/span><\/strong><\/p>\n<p><strong>As the &#8220;facade&#8221; of the vehicle&#8217;s appearance, the skin must not only maintain its beauty, but also cope with challenges such as gravel impact and acid rain corrosion.<\/strong><\/p>\n<ul>\n<li>Material selection: From galvanized sheet to aluminum alloy<\/li>\n<li><span data-font-family=\"default\">Economical solution: 0.7mm galvanized steel sheet (SECC), low cost and scratch resistance;<\/span><\/li>\n<li><span data-font-family=\"default\">Lightweight solution: 5052 aluminum alloy, 40% lighter, suitable for new energy vehicles;<\/span><\/li>\n<li><span data-font-family=\"default\">High-end solution: Dual-phase steel (DP590), with a tensile strength of 590MPa.<\/span><\/li>\n<\/ul>\n<p><strong>Precision molding: millimeter-level control of curved surfaces.<\/strong><\/p>\n<ul>\n<li><span data-font-family=\"default\">Adopting a multi-point flexible mold system, the curvature of the skin can be quickly switched;<\/span><\/li>\n<\/ul>\n<p><strong>Anti-corrosion process: 6-layer protection system<\/strong><\/p>\n<ul>\n<li><span data-font-family=\"default\">Nano-ceramic pretreatment (replacing traditional phosphating, no heavy metal emissions)<\/span><\/li>\n<li><span data-font-family=\"default\">Cathode electrophoretic primer (film thickness 18-22\u03bcm)<\/span><\/li>\n<li><span data-font-family=\"default\">Intermediate coating (anti-stone impact particle content \u226540%)<\/span><\/li>\n<li><span data-font-family=\"default\">Topcoat spraying (2K varnish, UV aging resistance)<\/span><\/li>\n<li><span data-font-family=\"default\">Partial PPF film (resistance to sand and gravel impact)<\/span><\/li>\n<li><span data-font-family=\"default\">Cavity wax injection (prevent internal cavity rust)<\/span><\/li>\n<\/ul>\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>In the automotive manufacturing industry, the precision of each component directly affects the safety and durability of the entire vehicle. As the key supporting components of the automotive structure, the manufacturing process of the chassis and body skin is of paramount importance. This article will deeply analyze the core technologies of automotive chassis sheet metal [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":19253,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[133,138],"tags":[],"class_list":["post-19251","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-newcenter","category-company-dynamics"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.8 (Yoast SEO v27.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Sheet Metal Tech Guide: Precision Techniques for Auto Chassis &amp; Panels -<\/title>\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.cttechth.com\/sheet-metal-tech-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[:th]\u0e04\u0e39\u0e48\u0e21\u0e37\u0e2d\u0e0a\u0e48\u0e32\u0e07\u0e40\u0e17\u0e04\u0e19\u0e34\u0e04\u0e14\u0e49\u0e32\u0e19\u0e41\u0e1c\u0e48\u0e19\u0e42\u0e25\u0e2b\u0e30: \u0e40\u0e17\u0e04\u0e19\u0e34\u0e04\u0e04\u0e27\u0e32\u0e21\u0e41\u0e21\u0e48\u0e19\u0e22\u0e33\u0e2a\u0e33\u0e2b\u0e23\u0e31\u0e1a\u0e41\u0e0a\u0e2a\u0e0b\u0e35\u0e41\u0e25\u0e30\u0e41\u0e1c\u0e07\u0e04\u0e27\u0e1a\u0e04\u0e38\u0e21\u0e23\u0e16\u0e22\u0e19\u0e15\u0e4c[:en]Sheet Metal Tech Guide: Precision Techniques for Auto Chassis &amp; Panels[:]\" \/>\n<meta property=\"og:description\" content=\"In the automotive manufacturing industry, the precision of each component directly affects the safety and durability of the entire vehicle. 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