FEM Analysis and Experiment Validation on Multi-Pass Forging of Torx Round Flange Bolt
- PDF / 578,873 Bytes
- 7 Pages / 595 x 842 pts (A4) Page_size
- 92 Downloads / 167 Views
ght © 2020 KSAE/ 11705 pISSN 12299138/ eISSN 19763832
FEM ANALYSIS AND EXPERIMENT VALIDATION ON MULTI-PASS FORGING OF TORX ROUND FLANGE BOLT Shih-Hsien Lin1), Dyi-Cheng Chen1), Un-Chin Chai2) and Gow-Yi Tzou2)* Department of Industrial Education and Technology, National Changhua University of Education, Bao-Shan Campus, Changhua 500, Taiwan 2) Department of Intelligent Automation Engineering, Chung-Chou University of Science and Technology, Yuanlin 510, Taiwan 1)
(Received 22 July 2019; Revised 5 November 2019; Accepted 4 December 2019) ABSTRACTThis study aims at exploring the multi-pass forging of Torx Round Flange Bolt (automotive fastener) to simulate each pass forging process using FEM simulation. The software is used to carry out the simulation analysis. Constant shear friction is always assumed at the interface between die and workpiece to explore the effective stress, the effective strain, the velocity filed, and the forging force for each pass. Through the pass schedule plan and design based on FEM analysis, the four-pass forging process is designed to form the Torx Round Flange Bolt compared the five-pass forging. It is noted that the total forging force is 1,204 kN, so the 200 tons machinery in the factory can be chosen to manufacture this automotive fastener. The die stress analysis for each pass has been explored to realize whether the dies are damaged or not. The forming feasibility of Torx Round Flange Bolt can be performed by FEM simulation. All dies designs and forming results can be proposed to the dies manufacture so as to perform the realistic experiments. Comparisons between FEM and experiment for final product dimensions can be carried out. The maximum dimension error is just around 3.32% to show a good agreement with the experiment. The research results can provide to the industries as the references of establishment of multi-pass forging technology. KEY WORDS : Multi-pass, Torx round flange bolt, Forging force, FEM simulation
NOMENCLATURE E Vo m
(2014b), used Simufact commercial software to investigate into the effects of stramline on the tesnsile strength. It revealed the streamlines are broken which can be simulated by Simufact software as the head of screw is too larger compared the axis part. As the streamline is broken, the tensile strength is reduced very quickly. Chang et al., 2015a, explored the die stress of inverse extrusion. The crack position of die could be realized from the principal stress distribution. Chang et al. (2015b) explored the defect improvement of extrusion dies using combination of FEM stress analysis with Taguchi method. Taguchi method was used to obtain the optimal parameters assembly and influence rank of control factors. Chang et al. (2016), used 3D FEM software to predict defect of T-type Circular Pipe Fastener, and to realize the reason of defect and to avoid the defect occurred. Shih et al. (2016), explored forging stream line using Simufact software and used 3D FEM simulation to study how to design tool on multi-stage cold forming of long circular
Data Loading...
