{"id":1227,"date":"2025-12-05T11:30:18","date_gmt":"2025-12-05T11:30:18","guid":{"rendered":"https:\/\/cndlfh.com\/?p=1227"},"modified":"2025-12-05T11:30:18","modified_gmt":"2025-12-05T11:30:18","slug":"%e5%a6%82%e4%bd%95%e5%88%b6%e5%ae%9a%e6%b8%85%e6%99%b0%e7%9a%84%e6%9c%ba%e5%8a%a0%e5%b7%a5%e5%b7%a5%e8%89%ba%e8%a6%81%e6%b1%82%ef%bc%9f%e8%ae%be%e8%ae%a1%e5%b8%88%e4%b8%8e%e9%87%87%e8%b4%ad%e5%bf%85","status":"publish","type":"post","link":"https:\/\/cndlfh.com\/en\/1227\/","title":{"rendered":"How to develop clear machining process requirements? A must-see communication checklist for designers and purchasing"},"content":{"rendered":"<p>Avoid processing ambiguity and rework! This article provides designers and purchasers with a complete copy of the<a href=\"https:\/\/cndlfh.com\/en\/?p=1227&amp;preview=true\">List of machining process requirements<\/a>We cover key items such as materials, tolerances, heat treatments, surface treatments, etc. to ensure that your needs are accurately understood and realised.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1228\" src=\"https:\/\/cndlfh.com\/wp-content\/uploads\/2025\/12\/QQ20251102-193551.png\" alt=\"\" width=\"354\" height=\"384\" srcset=\"https:\/\/cndlfh.com\/wp-content\/uploads\/2025\/12\/QQ20251102-193551.png 354w, https:\/\/cndlfh.com\/wp-content\/uploads\/2025\/12\/QQ20251102-193551-11x12.png 11w\" sizes=\"auto, (max-width: 354px) 100vw, 354px\" \/><\/p>\n<p>Develop machining process requirements: communicate accurately and do it right the first time<\/p>\n<p>INTRODUCTION: \u201cMany machining problems stem from unclear requirements. Providing a clear document of process requirements is the first step to a successful project.\u201d<\/p>\n<p>I. What should a complete list of process requirements contain?<\/p>\n<p>(presented in a list or table)<\/p>\n<p>Basic information: part number, name, version.<\/p>\n<p>Material Requirements: Brand, specification, standard number (e.g. 6061-T6 aluminium bar, in accordance with GB\/T 3191).<\/p>\n<p>Dimensional and geometrical requirements: references to tolerance standards (e.g. ISO 2768-m), special tolerances for critical dimensions, form and position tolerances.<\/p>\n<p>Surface treatment requirements: surface roughness (e.g. Ra 1.6), plating (e.g. hard chrome plating, thickness 10-15\u03bcm), anodising (colour, film thickness), sandblasting, etc.<\/p>\n<p>Heat treatment requirements: tempering HRC28-32, carburising quenching, etc.<\/p>\n<p>Other special requirements: burr removal standards, cleanliness, packaging, labelling.<\/p>\n<p>Second, how to effectively communicate your requirements with the machine shop?<\/p>\n<p>(3D model (STEP format) + 2D drawing (PDF\/DWG) + process requirement document (PDF) recommended)<\/p>\n<p>III. Examples of processing problems caused by common \u201cunclear requirements\u201d<\/p>\n<p>(Case 1: Only \u201csmooth surface\u201d was written, leading to inconsistent understanding of roughness. Case 2: Heat treatment was not specified and the part was subsequently deformed.)<\/p>\n<p>Conclusion &amp; CTA: Clear requirements are the beginning of co-operation. In order to ensure that these requirements are strictly enforced in production, a professional machine shop must follow a rigorous set of machining process specification requirements (link to article V).<\/p>\n<p>FAQ.<\/p>\n<p>\u201cWhat is the visual difference between surface roughness Ra 3.2 and 1.6?\u201d (Answer: A comparison picture is attached, Ra 1.6 is obviously smoother, and Ra 3.2 shows minor machining marks.)<\/p>\n<p>\u201cWhen is it necessary to specify the standard number of a material?\u201d (Answer: For critical performance parts, designation is highly recommended to ensure consistency of material composition and performance.)<\/p>","protected":false},"excerpt":{"rendered":"<p>\u907f\u514d\u52a0\u5de5\u6b67\u4e49\u4e0e\u8fd4\u5de5\uff01\u672c\u6587\u4e3a\u8bbe\u8ba1\u5e08\u548c\u91c7\u8d2d\u4eba\u5458\u63d0\u4f9b\u4e00\u4efd\u5b8c\u6574\u7684\u673a\u52a0\u5de5\u5de5\u827a\u8981\u6c42\u6e05\u5355\uff0c\u6db5\u76d6\u6750\u6599\u3001\u516c\u5dee\u3001\u70ed\u5904\u7406\u3001\u8868\u9762\u5904\u7406\u7b49 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-1227","post","type-post","status-publish","format-standard","hentry","category-26"],"_links":{"self":[{"href":"https:\/\/cndlfh.com\/en\/wp-json\/wp\/v2\/posts\/1227","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cndlfh.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cndlfh.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cndlfh.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/cndlfh.com\/en\/wp-json\/wp\/v2\/comments?post=1227"}],"version-history":[{"count":1,"href":"https:\/\/cndlfh.com\/en\/wp-json\/wp\/v2\/posts\/1227\/revisions"}],"predecessor-version":[{"id":1229,"href":"https:\/\/cndlfh.com\/en\/wp-json\/wp\/v2\/posts\/1227\/revisions\/1229"}],"wp:attachment":[{"href":"https:\/\/cndlfh.com\/en\/wp-json\/wp\/v2\/media?parent=1227"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cndlfh.com\/en\/wp-json\/wp\/v2\/categories?post=1227"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cndlfh.com\/en\/wp-json\/wp\/v2\/tags?post=1227"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}