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我厂是以生产G72锯床为主的中小型企业。在锯床总装试车时,常常会发现上、下盖内表面严重烧伤并呈沟纹现象,我厂称之为“拉瓦”,结果使一套成本三十多元的上、下盖报废,造成一定的经济损失。一九八五年六月,我们对同行厂家进行了调查,了解到他们对上、下盖的材料已作了改变,有的厂把45钢改为铸钢,有的厂改用铸铁。针对这一情况,我们也作了两点改进:(1)将上、下盖材料由45钢改为HT20-40铸铁;(2)将上、下盖改为整体式。这样改进后,制造
Our factory is a small and medium-sized enterprise that mainly produces G72 sawing machines. When the sawing machine is assembled and tested, it is often found that the inner surface of the upper and lower lids is seriously burned and has a groove pattern. Our factory calls it “Lava”, resulting in the scrapping of upper and lower covers that cost more than 30 yuan. Certain economic losses. In June 1985, we conducted a survey of our peer manufacturers and learned that they had made changes to the materials of the upper and lower lids. Some factories changed 45 steel to cast steel, and some factories switched to cast iron. In response to this situation, we also made two improvements: (1) change the upper and lower cover materials from 45 steel to HT20-40 cast iron; and (2) change the upper and lower covers to integral type. After this improvement, manufacturing