FEM Simulation and Experimental Verification on Multi-Stage Forming of Hexagonal Flange Screw

• Main Authors: CHANG,WEI-TE, 張維德
• Other Authors: HSIA,SHAO-YI
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/hs6t2k

碩士 === 高苑科技大學 === 機械與自動化工程研究所 === 107 === Fasteners are currently the most widely used products in the world. They can be quickly assembled or disassembled the parts, and have the reputation of industrial rice or mechanical seeds. In this study, the finite element simulation software DEFORM-3D was used to analyze the multi-stage forming of hexagonal flange screws. The interface friction between the mold and the workpiece was assumed a constant shear friction, and the forming load, geometry and other effects during multi-pass forming were discussed. Force, equivalent strain and velocity field distribution. Finally, the experimental verification is carried out, and the simulated size of the fastener is compared with the experimental size to verify the feasibility of the finite element simulation on the fastener forming analysis. The experimental and simulated size comparison results, the maximum error is 2.15%, which is quite accurate. It can be seen that the finite element software simulation in multi-pass forming fastener is a very feasible and accurate analysis tool, which can reduce the time and cost of fastener mold development. In addition, the fasteners after the tooth decay are compared with the gold after the heat treatment, and the finished product (after heat treatment) is subjected to the hardness test and the tensile test, and the test results are all in conformity with the ASTM A307 standard.