薄壁球壳真空吸附装夹变形力学分析与控制

doi:10.3969/j.issn.1000-1093.2017.07.020

兵工学报 ›› 2017, Vol. 38 ›› Issue (7): 1409-1415.doi: 10.3969/j.issn.1000-1093.2017.07.020

薄壁球壳真空吸附装夹变形力学分析与控制

何泽地¹，田东宁¹，杨金川¹，姚智慧²

(1.中国工程物理研究院材料研究所, 四川绵阳 621700; 2.哈尔滨工业大学机电工程学院, 黑龙江哈尔滨 150001)

收稿日期:2016-11-27 修回日期:2016-11-27 上线日期:2018-04-12
通讯作者: 杨金川(1988—), 男,工程师 E-mail:yangjinchuan@caep.cn
作者简介:何泽地(1963—), 男, 工程师。E-mail: hezedi@caep.cn
基金资助:
装备“十二五”预先研究项目（42601070202）

Control and Mechanical Analysis of Clamping Deformation of Thin-walled Spherical Shell Workpiece during Vacuum Suction

HE Ze-di¹， TIAN Dong-ning¹， YANG Jin-chuan¹， YAO Zhi-hui²

(1.Institute of Materials, China Academy of Engineering Physics, Mianyang 621700, Sichuan, China; 2.School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China)

Received:2016-11-27 Revised:2016-11-27 Online:2018-04-12

摘要/Abstract

摘要： 针对标准铝合金薄壁球壳零件的装夹变形问题，建立球壳变形的数学理论模型以及有限元仿真模型，实现了薄壁球壳真空吸附装夹状态的理论分析与仿真优化。明确了真空负压与装夹位置对球壳变形的影响；基于球壳与吸具之间的装夹位置关系，完成了吸具主要尺寸参数的优化设计。优化后吸具样件的测量结果表明，通过控制真空负压以及改变装夹接触位置，可以有效减小球壳的装夹变形，进而提高其加工的尺寸精度。

关键词: 机械制造工艺与设备, 薄壁球壳, 真空吸附, 装夹变形, 有限元仿真

Abstract: The thin-walled spherical shell workpiece is liable to deform during clamping before machining. A standard aluminum-alloy shell is taken for example. A mathematical model is established based on spherical deformation mechanism and finite element analysis. The theoretical analysis and simulation optimization are carried out for clamping design of semi-spherical shell with vacuum suction. The influences of suction strength and clamping location on deformation in the state of air pressure under average distributed load are analyzed. The result shows that the clamping deformation of shell can be minished effectively by controlling the suction strength and modifying the clamping location so that the machining size accuracy is improved. The main design parameter of vacuum fixture is optimized for the location relationship between shell and fixture. Key

Key words: manufaturingtechnologyandequipment, thin-walledsphericalshell, vacuumsuction, clampingdeformation, simulation

中图分类号:

TG751.1

何泽地，田东宁，杨金川，姚智慧. 薄壁球壳真空吸附装夹变形力学分析与控制[J]. 兵工学报, 2017, 38(7): 1409-1415.

HE Ze-di， TIAN Dong-ning， YANG Jin-chuan， YAO Zhi-hui. Control and Mechanical Analysis of Clamping Deformation of Thin-walled Spherical Shell Workpiece during Vacuum Suction[J]. Acta Armamentarii, 2017, 38(7): 1409-1415.

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薄壁球壳真空吸附装夹变形力学分析与控制

Control and Mechanical Analysis of Clamping Deformation of Thin-walled Spherical Shell Workpiece during Vacuum Suction

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