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弹簧垫圈是我厂产品之一,规格众多。以EQ140五吨车为例,每车共有20多个品种,从Φ3到Φ30,共1100余件。弹簧垫圈零件虽小,但制造工序长,工艺也较为繁杂,尤其是冷拔料的改制工序更长。弹簧垫圈是用热轧料65Mn改制成梯形钢丝,一般要经过三次退火、酸洗、磷化及拔、轧等工序,然后卷成垫圈,热处理后硬度为HRC43—48。最后成品表面磷化处理。弹簧垫圈曾在卷制、装配中断裂,我们分析了断裂情况,找出了断的原因,提出了改进措施,取得了良好效果。
Spring washer is one of our products, many specifications. To EQ140 five tons of cars, for example, a total of more than 20 varieties per vehicle, from Φ3 to Φ30, a total of more than 1100 pieces. Spring washer parts are small, but the manufacturing process is long, the process is more complicated, especially the cold-drawn material conversion process longer. Spring washer is made of hot rolled steel 65Mn into trapezoidal steel wire, usually after three annealing, pickling, phosphating and pulling, rolling and other processes, and then rolled into washers, hardness HRC43-48 after heat treatment. The final product surface phosphating. Spring washers have been rolling, assembly fracture, we analyzed the fracture situation, to find out the reasons for the break, put forward improvements, and achieved good results.