论文部分内容阅读
我厂生产的 EQ140汽车后桥壳铸件,由于内腔粘砂严重,需要进行3～4次抛丸处理才能达到要求。每个铸件抛丸要消耗钢丸3.879kg,每件抛丸的总费用不少于9元。按年产12万辆 EQ140汽车计算,该项费用达100万元/年以上。同时,由于抛丸次数多,较大程度地加重了清理工序的负担,并且抛丸后的铸件表面粗糙。为解决铸件内腔粘砂问题、针对该件结构、浇注及砂芯的特点,我们进行了醇基膏状涂料的研制、试验,取得了较好的效果。
I plant the EQ140 automobile rear axle shell castings, because the cavity sticky sand serious, need 3 to 4 shot blasting in order to meet the requirements. Each casting shot blast consumes 3.879kg steel shots, the total cost of each shot blasting not less than 9 yuan. According to the annual output of 120,000 EQ140 cars, the cost of 100 million / year. At the same time, due to the large number of shots, the burden of the cleaning process is aggravated to a large extent, and the surface of the castings after shot blasting is rough. In order to solve the problem of sticking sand in casting cavity, in view of the structure of the piece, casting and the characteristics of sand core, we developed and tested alcohol-based paste coating and achieved good results.