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文章编号：1001-4934(2017)03-0052-03
Die and Mould Technology No, 3 2017
模具表面处理对冲压件拉伤问题的改善
于鹏超，姚海波，田前程
（河北省汽车工程技术研究中心长城汽车股份有限公司技术中心，河北保定071000）摘要：汽车冲压件在成形过程中很容易出现表面的拉伤问题，如果继续生产，模具的表面也会出现拉伤，生产出的制件易造成制件报废或返工返修，既增加单件的成本，又增加了模具维护的成本。通常解决问题的方法是停机对模具表面进行修磨、抛光，但容易造成模具凸、凹模间隙变大，产品品质降低。因此就如何解决制件拉伤问题展开了系统的分析，重点对其中一个解决方法模具表面TD覆层处理（热扩散法碳化物覆层处理)进行详细说明。经过对成型模具进行TD覆层处理，改善了冲压件的拉伤缺陷问题，保证了产品质量，保证了产品的顺利加工。
关键词：冲压件拉伤；模具材料；表面TD覆层处理；模具寿命
中图分类号：TG386
文献标识码：B
Improvement of the scoringproblemfor stampingparts by die surfacetreatment
YU Peng-chao,YAO Hai-bo, TIAN Qian-cheng
Abstract: Problem surfaces are very casy to appear in automobile stamping parts during the forming process.If production continues, die surface will appear to be scratched resulting in scrapping and rework parts,which increasc the production cost and the die maintenance cost. The common method to solve the problem is to stop machine for grinding polishing the die surface,but it is easy to causc the large gap between dic and punch,and reduce the product quality.Therefore, systematic analysis on how to solve the problem of workpiece scoring is carried out; and one of the solutions - die surface TD coating treatment('Thcrmal Diffision Carbide Coating Process) is focuscd on and described in detail. By using the TD coating treatment on the die surfaces, the scoring problcm of the workpiece is improved, which can guarantee the product quality and ensure the smooth process of manufacturing Keywords: stamping parts scoring: die material; surface TD coating treatment; dic life
求越来越高，这就促进汽车行业冲压材料向高
0引言
随着我国汽车工业蓬勃发展及消费者安全环保意识的增强，我国消费者对汽车性价比要收稿日期：2016-03-08
作者简介：于鹏超（1988一），男，助理工程师。万方数据
强度及轻量化发展。而随着冲压材料越来越多地采用高强板，无论厚料板还是高强度钢板，其冲压或滚压成形的模具都承受极高的成形应力，工件表面拉伤间题更是严重，所以汽车模具