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我厂 EQ140载重汽车发动机缸体采用缸套以来,由于缸套材料较缸体材料硬度高,耐磨性好,因而原来珩磨缸体用的油石,不能适应珩磨缸套的要求。外购新牌号的油石,性能又极不稳定,同一批油石,珩磨这批缸套孔好用,珩磨另一批缸套孔就不好用了。没有采用缸套前,每副油石(36块)能珩120个缸体,采用缸套后,外购油石按工艺严格挑选,也只能珩20个,最差的只能珩7～8个缸体,严重影响了缸套孔的珩磨质量,也影响了生产任务的完成。为了解决珩磨质量问题,曾选用过国内七、八家砂轮厂制造的珩磨缸体用油石,虽严
Since the cylinder liner of EQ140 truck engine block in our factory has been used, the original material of honing cylinder can not meet the requirements of honing cylinder liner because of its high hardness and good wear resistance. Buying a new brand of whetstone, the performance is extremely unstable, with a group of whetstone, honing these sets of holes easy to use, honing another set of holes is not easy to use. Before the use of cylinder liner, each pair of whetstone (36) can Heng 120 cylinder body, cylinder liner, the purchase of asbestos by the process of rigorous selection, only Heng 20, the worst can only Heng 7 to 8 Cylinder, a serious impact on the quality of honing cylinder liner hole, but also affect the completion of production tasks. In order to solve the problem of honing quality, it has been used in domestic seven, eight grinding wheel honing machine made of whetstone, though strictly