刘善民 唐春 凌锡春

[摘    要]变矩器是一类技术含量高的传动产品，实际工作中在车削加工变矩器泵轮分总成时易出现外圆圆度、形位公差不满足要求的现象。通过分析泵轮分总成车削加工工艺要求并对比三爪卡盘、弹性薄壁夹盘两种车夹具方案，认为后者能有效地解决问题。介绍弹性薄壁夹盘工作原理，描述HY218泵轮分总成弹性薄壁夹盘设计过程及设计要点，并对其应用结果分析评价，最后得出使用弹性薄壁夹盘适合加工泵轮分总成的结论。

[关键词]弹性薄壁夹盘;弹性盘;变矩器;泵轮分总成

[中图分类号]TP391-72 [文献标志码]A [文章编号]2095–6487（2021）04–00–02

Application of Elastic Thin-Walled Chuck in Torque

Converter Pump Wheel Sub-assembly

Liu Shan-min，Tang Chun，Ling Xi-chun

[Abstract]Torque converter is a kind of transmission product with high technical content. In actual work， when turning the torque converter pump wheel sub-assembly， it is easy to have the phenomenon that the outer roundness and shape tolerance do not meet the requirements. This paper analyzes the turning process requirements of the pump wheel sub-assembly and compares the three-jaw chuck and the elastic thin-walled chuck. It is believed that the latter can effectively solve the problem， and then briefly introduces the working principle and key points of the elastic thin-walled chuck. The design process and design points of the elastic thin-walled chuck of the HY218 pump wheel sub-assembly are described in detail， and the application results are analyzed and evaluated. Finally， the conclusion that the use of the elastic thin-walled chuck is suitable for processing the pump wheel sub-assembly is drawn.

[Keywords]elastic thin-walled chuck; elastic disc; torque converter; pump wheel sub-assembly

由于液力變矩器泵轮分总成为薄壁类零件，其加工质量包括外圆圆度、垂直度、端面跳动等并且加工精度要求很高，使用三爪卡盘，夹紧力不易控制，工件易变形，圆度无法保证;另外，采用传统的三爪卡盘装夹工件不方便，生产效率低，不适合大批量加工。本文根据液力泵轮分总成的加工工艺要求，探讨如何应用弹性薄壁夹盘的有关知识。

1 液力变矩器的泵轮分总成加工工艺分析

以HY218泵轮分总成为例，如图1所示。从加工要求来看，以B基准与泵轮外壳外圆为基准，夹持泵轮外壳外圆车削加工泵轮分总成为最佳的装夹方案，其装夹方案有两种：

（1）使用3个软爪加工，夹具结构简单，加工和维修方便，成本较低。但夹紧力作用点少（只有3个）、夹具精度低，会使工件变形，即外圆变成三角形，如图2所示。

（2）应用弹性薄壁夹盘工作原理与结构设计专用夹盘加工，实现自动夹紧，即通过设备液压缸的动作实现夹具的夹紧松开动作;夹紧力作用点多且对称均匀一致;加工尺寸一致性好。……