Affiliation:
1. Dept. of Mechanical Engineering, University of California, Berkeley, Berkeley, CA 94720-1740
Abstract
A 3D finite element model was developed for the simulation of drilling burr formation processes of 304L stainless steel. The nonlinear thermo-elastic-plastic model simultaneously accounts for dynamic effects of mass and inertia, strain hardening, strain rate, automatic mesh contact with friction capability, material ductile failure and temperature-mechanical coupling. Material ductile failure criteria were proposed to simulate drilling burr formation. Based on a series of stress contours and the progressive deformation of the workpiece edge obtained from simulation, a drilling burr formation mechanism was proposed and divided into four stages: initiation, development, pivoting point, and formation stages with cap formation. The burr thickness is largely determined by the distance between the pre-defined machined surface and the pivoting point, while the burr height is determined by the positions of the pivoting point and the cap formation. The FEM simulation demonstrates the dominant roles of negative shearing and bending mechanisms in the drilling burr formation process. The simulation results coincide with phenomenological observations of burr geometry from drilling 304 stainless steel and plasticine work materials. [S1087-1357(00)01202-8]
Subject
Industrial and Manufacturing Engineering,Computer Science Applications,Mechanical Engineering,Control and Systems Engineering
Reference30 articles.
1. Gillespie, L. K.
, 1979, “Deburring Precision Miniature Parts,” Precis. Eng., 1, No. 4, pp. 189–198.
2. Gillespie, L. K., 1975, “Hand Deburring of Precision Parts,” Bendix Aerospace, Kansas City Division, Report No. BDX 613–1443.
3. Gillespie, L. K., 1975, “Burrs Produced by Drilling,” Bendix Corporation, Unclassified Topical Report BDX-613-1248, December.
4. Takazawa, K., 1988, “The Academic Challenge of Burr Technology in Japan,” SME Deburring and Surface Conditioning Technique Conference.
5. Stein, J., 1995, “Burr Formation in Precision Drilling of Stainless Steel,” Ph.D. dissertation, Dept. of Mech. Eng., University of California, Berkeley.
Cited by
87 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献