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球墨鑄鉄曲軸的冒口一般是用气割的办法去掉,这样不但浪費人力物力,同时气割后的冒口頸凹凸不平、硬度很高,在机械加工时刀头也容易碰掉。在党的建设社会主义总路线的鼓舞下,大家都鼓起了敢想敢干的精神,在缺乏資料的情况下,提出了用泥芯割片試制易割胃口。开始时試澆了两箱,把鑄出的曲軸打成六段,檢查断面并没有发現縮松現象。
Ductile cast iron crankshaft riser is generally cut with gas cutting method, so not only a waste of manpower and material resources, while the gas after cutting mouth neck uneven, high hardness, the machining head is also easy to knock off. Encouraged by the Party’s general line of building socialism, everyone dared to dare to think that they would dare to work hard. In the absence of any information, they proposed the feasibility of making a cutting-edge appetite by using mud cores. The beginning of the test pouring two boxes, the cast of the crankshaft labeled six, check the cross-section and found no shrinkage phenomenon.