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

doi:10.3969/j.issn.1000-1093.2017.07.020

Abstract

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

CLC Number:

TG751.1

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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第38卷
第7期2017 年7月兵工学报ACTA
ARMAMENTARIIVol.38No.7Jul.2017

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