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Design of relief-cavity in closed-precision forging of gears 被引量:4

Design of relief-cavity in closed-precision forging of gears
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摘要 To reduce the difficulty of material filling into the top region of tooth in hot precision forging of gears using the alternative die designs, relief-cavity designs in different sizes were performed on the top of die tooth. The influences of the conventional process and relief-cavity designs on corner filling, workpiece stress, die stress, forming load and material utilization were examined. Finite element simulation for tooth forming, die stress and forming load using the four designs was performed. The material utilization was further considered, and the optimal design was determined. The tooth form and forming load in forging trials ensured the validity of FE simulation. Tooth accuracy was inspected by video measuring machine(VMM), which shows the hot forged accuracy achieves the level of rough machining of gear teeth. The effects of friction on mode of metal flow and strain distribution were also discussed. To reduce the difficulty of material filling into the top region of tooth in hot precision forging of gears using the alternative die designs, relief-cavity designs in different sizes were performed on the top of die tooth. The influences of the conventional process and relief-cavity designs on corner filling, workpiece stress, die stress, forming load and material utilization were examined. Finite element simulation for tooth forming, die stress and forming load using the four designs was performed. The material utilization was further considered, and the optimal design was determined. The tooth form and forming load in forging trials ensured the validity of FE simulation. Tooth accuracy was inspected by video measuring machine(VMM), which shows the hot forged accuracy achieves the level of rough machining of gear teeth. The effects of friction on mode of metal flow and strain distribution were also discussed.
出处 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第4期1287-1297,共11页 中南大学学报(英文版)
基金 Project(51375042)supported by the National Natural Science Foundation of China Project supported by Beijing Laboratory of Modern Transport Metal Materials and Processing Technology,China
关键词 gear forging precision forging relief-cavity alternative die metal flow corner filling 模具设计 热精锻 齿轮 浮雕 材料利用率 有限元模拟 成形载荷 精度检查
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