锻压技术

基于响应曲面法的衬套强力旋压工艺参数优化设计

英文标题：Parameters optimal design of power spinning process for bushing based on response surface method

作者：舒成龙樊文欣原霞张俊毅

单位：中北大学

分类号：

出版年,卷(期):页码：2015,40(4):60-64

摘要：

连杆衬套大多采用强力旋压成形工艺，其工艺参数多而复杂，而且工艺参数耦合在一起影响着连杆衬套的力学性能。为了揭示工艺参数对连杆衬套力学性能的影响规律，应用Design-Expert 8.0软件对连杆衬套强力旋压成形工艺进行数值模拟，基于响应曲面设计法对连杆衬套在强力旋压成形中的减薄率、进给比和热处理温度3个主要工艺参数进行优化设计。将经过强力旋压后的连杆衬套抗拉强度作为优化目标响应值，采用三元二次回归方程作为软件分析的数学模型。试验数据及软件分析结果表明，当抗拉强度在605～645 MPa时连杆衬套的力学性能均能满足产品图纸要求。连杆衬套强力旋压工艺参数的优化组合为：减薄率30%、进给比0.3 mm·r-1 、热处理温度275 ℃。

The connecting rod bushing is mainly formed by power spinning process, which includes many complex process parameters. Its mechanical properties are affected by coupling process parameters. In order to study the influence of process parameters on the mechanical properties of connecting rod bushing, the power spinning forming process of connecting rod bushing was simulated by Design-Expert 8.0 software, and the main process parameters of thinning rate, feed ratio and heat treatment temperature were optimized based on the response surface design method. The tensile strength of connecting rod bushing formed by the power spinning was regarded as the optimization objective response, and the quadratic regression was regarded as the mathematical model of the software. Test data and software analysis show that the mechanical properties of connecting rod bushing can meet the requirements of the drawings when its tensile strength is under 605-645 MPa. The optimal combination of parameters in power spinning connecting rod bushing is as follows:thinning rate of 30%, feed ratio 0.3 mm·r-1 and heat treatment temperature of 275 ℃.

基金项目：

山西省自然科学基金资助项目(2012011023-2)；山西省高校高新技术产业化项目(20120021)

舒成龙（1982-），男，硕士研究生

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