The Study of the Forging Process for Hexagonal Flange Welded Nuts

• Main Authors: CHEN,SHIH-TING, 陳世庭
• Other Authors: YANG,JIN-BIN
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/22384f

碩士 === 國立高雄科技大學 === 機械與自動化工程系 === 107 === Due to the rise of China and other Southeast Asian countries in recent years and the impact of low-price competition, Taiwan's fastener industry have faced great challenges. To lower costs effectively have become the greatest concern to all manufacturers. How to use new process technology to reduce fasteners defect loss, excess scrap, reprocessing times...etc. Making the most efficient use of materials. The purpose of this paper is to study the feasibility of using cold forging process to produce hexagonal flange welded nuts, reducing subsequent lathe processes. Thence, this study of using cold forging process to develop will start with using the CAE analysis software: DEFORM-3D to simulate cold forging, and discuss the situation of material flow and the feasibility of mold design. The original design of stages is to form the hex and the groove simultaneously. According to the simulation software DEFORM-3D, while forming the hexagonal and the groove at the same time, the speed difference of the material flow and the material forming pressure is much more than the tensile strength of the material, which causes the nuts to fracture. The groove and the hexagon will need to be formed separately. After revising the original design, the simulation software showed that the result is feasible. Therefore, develop and assemble the molds according to the revised version. After actual cold forging, the results showed that forming situation is in accordance with the simulation, and the measured dimensions are all in accordance with the requirements and the dimensions are stable. After massive production of 100000 pcs, the dimensions are stable, which proofed the mold design of this study is feasible. This design could save 10% material cost, dispense with lathe processes, lower the material and lather cost at the same time.