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为防止球铁曲轴油孔部位在表面感应加热淬火时,因应力集中而形成淬火裂纹,人们想出了种种办法来解决,如采用半圈感应器与旋转加热淬火工艺、使油孔处应力集中现象有较大的缓解,但油孔淬裂现象还不能杜绝。有的单位采用在油孔中塞铜销的办法,实践效果很好,但在大批流水作业生产中,增加这道工序比较麻烦。能否有更好的办法呢?有!几年来,我们通过实践,在冷却方法上做文章,取得了令人满
In order to prevent ductile iron crankshaft oil hole surface induction heating quenching, due to stress concentration and the formation of quenching cracks, people come up with a variety of ways to solve, such as the use of semi-circle sensors and rotary heating quenching process, the stress concentration at the hole The phenomenon has a greater ease, but the phenomenon of quenching oil hole can not be eliminated. Some units adopt the method of plugging copper in the oil hole, and the effect is very good. However, it is troublesome to increase this procedure in a large number of assembly line production. Can there be a better way? There! In recent years, we practice, make a fuss about the cooling method, made full