一种四点浮动端面驱动特种夹具设计与应用  

Design and Application of a Special Face Driving Fixture with Four Auto-Compensating Jaws

作　　者：刘宏利[1] 刘明玺[1] 丁万霞[1] 冯小庭 潘伟[1] LIU Hong-li;LIU Ming-xi;DING Wan-xia;FENG Xiao-ting;PAN Wei(Xi＇an Railway Vocational＆Technical Institute, Xi＇an 710026 China)

机构地区：[1]西安铁路职业技术学院,陕西西安710026

出　　处：《自动化技术与应用》2018年第4期21-25,共5页Techniques of Automation and Applications

基　　金：陕西省教育厅科研资助项目(编号15JK2109)

摘　　要：传统轴类零件加工过程中常遇到工件调头及其附带的零件找正、二次对刀、编程参数修改、工件夹伤等问题,导致轴类零部件加工的同轴度低、精度差且加工效率不高。为实现高精度、高同轴度、高稳定性的轴类零件加工,基于四点端面驱动爪的杠杆原理,建立了浮动式动力卡盘顶紧力及行程的数学模型,并进行了分析。结果表明:四点浮动端面驱动卡盘四个驱动爪根据驱动端面的"不平度",通过端面尺寸自动补偿实现了四个驱动爪提供给端面的压力均等;同时,它通过一次装夹即可完成轴类零件的加工,不仅保证了设计基准与加工基准重合,而且缩短加工辅助时间60%以上。该高精度动力卡盘的设计卡盘的设计与应用对轴类零件制造有重要的实践价值。During the machining process of shaft parts, the problems including workpiece U-turn, re-erection and aligning, parameter adjustment, workpiece injury, etc. are usually encountered and resulting low coaxiality, low machining efficiency, low machining accuracy. Accounting for these problems, based on the lever principle, a special machine tool fixture, namely, a face drivring chuck with four auto-compensating jaws, which are of two pairs, are proposed and designed, and the mathematical model for jacking force and working stroke are deduced and further analysis are conducted. The results indicate that, these four auto-compensating jaws can automatic compensate the roughness unevenness of workpiece end, and the jacking force is divided uniformly on these four jaws. Meanwhile, The entire surface of shaft parts can be tumed with one single clamping, thus the coaxiality is guaranteed and the 60% auxiliary processing time is saved. This chuck is valuable for high accuracy machining of shaft parts.

关 键 词：特种机床夹具 端面驱动卡盘 四点浮动 高精度加工 高生产效率 

分 类 号：TG751[金属学及工艺—刀具与模具] TP352[自动化与计算机技术—计算机系统结构]