Forging Simulation Analysis of Micro Gear

• Main Authors: Lee, Tingfu, 李庭輔
• Other Authors: Wang, Chinyu
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/31565940389793825217

碩士 === 正修科技大學 === 機電工程研究所 === 100 === Tower micro gear is the forming of center axle and micro gear as a whole in a single forging manufacturing process. This will accomplish axle hole machining, center axle machining and the assembly problem of this two at the same time. With regards to micro gear system, because of its small size, it can’t easily reach the needs of the manufacturing precision and assembly precision which shows its importance. In the forging and forming micro gear of this study, the smallest modular micro gear being batch produced has a micro gear module of 0.15mm, 13 teeth and pressure angle of 20°. This study explores the effect of forging and forming in advance on the filling and simulation forging of the tower micro gear through DEFORM numerical simulation software to observe the filling and flow of forming of materials and the size of the billet surface of mold contact. The mold of the tower micro gear is input into the forging simulation software called DEFORM to undergo cold forging and used four different mold and forging manufacturing to undergo cold forging manufacturing simulation to compare the tower micro gear forming results of the four different molds to obtain the equivalent stress of the metal and equivalent strain distribution rules in deformation. The result of the stress analysis showed that choosing appropriate mold and die-forging process can improve the equivalent stress by 8% or more. The Stepped micro gear forming process used the billet pressure corresponding it to mold surface to undergo stress analysis obtaining the mold stress distribution condition in the final forming. This study proved that arbour’s single action and double action forming method of the molds as a whole are better which would make the bearing force of the molds uniform and would be of great help in improving the tooth precision and increasing the life of the mold.