滚压成型工艺的模具设计与加工方法研究OA

This paper studies the die design and processing methods of the rolling forming process of automobile rims.First,based on the inner rim structure,the rolling forming process preparation,scheme analysis,and force and deformation analysis are carried out.Then,the rim rolling forming die structure and the axial position relationship between the upper and lower rolls are analyzed to complete the rim rolling forming die design.Finally,steel-bonded cemented carbide is selected as the die material,and the die is mechanically processed through turning,milling,drilling and other processes.The die heat treatment and surface strengthening are achieved through annealing,quenching,tempering and surface strengthening of the die.The experiment found that during the heat treatment of the rim mold,when the preheating temperature was 800～830℃,the quenching temperature was 960～1 000℃,the first tempering temperature was 600℃,and the second tempering temperature was 560℃,the mold had the strongest corrosion resistance,and the maximum intergranular corrosion depth was 7.6μm,and the corrosion resistance was the most ideal;the stress conditions of the first,second,and third rolling processes all showed a trend of rapid increase first and then slow decrease,the minimum thickness of the first rolling process dropped rapidly and then maintained balance,the minimum thickness of the second rolling process did not change significantly,and the minimum thickness of the third rolling process was still a rapid drop and then maintained balance.