锻压技术

热成形件模具结构的研究与设计

英文标题：Research and design on die structure for hot forming part

作者：刘春雨郑薇

分类号：TG76

出版年,卷(期):页码：2016,41(11):110-114

摘要：

介绍了一种轿车B柱上框加强板热成形件的模具结构及工作原理，该套模具通过控制成形镶块内冷却水的流速等方式将加热后的硼钢板冲压成形，使加热到880~950 ℃的硼钢板以奥氏体向马氏体转变的最小冷却速度冷却，从而得到强度达1500 MPa 的高强度冲压件。重点介绍了模具冷却系统的结构及工作原理。该模具结构实现了硼钢板的热冲压成形及冷却，得到的冲压件面差、止口及孔的总合格率达到95%，无起皱、开裂等质量缺陷，满足了整车对该高强度钢板制件的精度及品质要求。

The die structure and working principle of hot forming for a kind of car B column frame reinforcing plate were introduced, and the boron steel after heating was formed by controlling the flow rate of cooling water in the stamping inserts through the above die. Then, the boron steel was heated to 880-950 ℃ and cooled at the minimum cooling speed with the transformation from austenite to martensite. Thus, the stamping workpiece with high strength up to 1500 MPa was obtained. Furthermore, the structure and working principle of the cooling system in the die were mainly introduced. The hot forming and cooling of boron steel are realized by this die structure. The total qualified rate of stamping surface, rabbet and hole reach 95% without wrinkling, cracking and other defects, and the requirements of precision and surface quality of vehicle for the high strength steel parts are met.

基金项目：

国家科技重大专项（2014ZX04002041）

刘春雨（1981-），男，学士，高级工程师

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