Transactions of Materials and Heat Treatment

Title：针对游艇转向机构中某转向臂在实际生产中出现的充不满的缺陷，设计了以模具预热温度、始锻温度、镦粗台孔深、镦粗下压量、压扁厚度为设计变量，以锻件充形率、终锻力为目标函数的混合水平正交表，通过对正交试验结果进行灰色关联处理，并进行极差分析，得知镦粗下压量、镦粗台孔深对目标函数影响显著。为了得到更优的工艺参数，在正交试验的基础上结合中心复合试验进行再优化，建立了以镦粗下压量、镦粗台孔深为自变量，以锻件充形率和终锻力为因变量的二阶响应面模型，从而得到了该产品的最优工艺参数。经过生产验证，优化后的工艺参数能在较低的成形载荷下锻造出合格的产品，并且消除了充不满的缺陷。

Authors： Li Xiangyang Xu Changda Zhou Youcai Wang Leigang

Unit： Jiangsu University Kunshan Huizhong Machine Co. Ltd.

KeyWords： steering arm forging local upsetting filling rate final forging force mixed orthogonal test grey relational theory response surface method

ClassificationCode：TG316.3

year,vol(issue):pagenumber：2020,45(2):1-6

Abstract：

Kunshan Huizhong Machine Co., Ltd., Kunshan 215331, China) Abstract: For the insufficient filling defect of a steering arm for yacht steering mechanism in the production, taking the preheating temperature of die, the initial heating temperature of blank, the hole depth of upsetting table, the upsetting reduction and the thickness of blank after flattening as the design variables and taking the filling rate of forging and the final forging force as the targets, a mixed level orthogonal table was designed. Then, the grey relational processing and the range analysis were conducted by the orthogonal test results, and the upsetting reduction and the hole depth of upsetting table had a significant impact on the targets. In order to obtain the better process parameters, the central composite test was used to re-optimize based on the orthogonal test. Furthermore, taking the upsetting reduction and the hole depth of upsetting table as independent variables and taking the filling rate of forging and the final forging force as dependent variables, a second-order response surface model was established, and the optimal process parameters of the product were obtained. After production verification, the qualified products were forged under lower forming load by the optimized process parameters, and the defect of insufficient filling was eliminated.

Funds：

国家自然科学基金资助项目（51775249）

李向阳（1994-），男，硕士研究生，E-mail：1170499744@qq.com；通讯作者：王雷刚（1963-），男，博士，教授，博士生导师，E-mail：lgwang@mail.ujs.edu.cn

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