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我厂生产的1105单体泵,其柱塞套的定位采用圆柱销定位。油泵壳体的销孔是细长孔,孔深16mm,销子长16mm。由于销孔直径小而且深,所以加工过程中不易保证精度。在设计上将销子与销孔的配合定为过盈配合:销孔3~(+0.014)mm,销子3_(+0.004)~(+0.01)mm。但产品又要求销子在运输和使用过程中不从壳体中掉出。为此我们曾采用将销子装入后再将销孔收口的措施,这样做,既不便于装配时的操作,而且也影响外观质量;同时,对于销孔尺寸超差无法补救,易造成浪费。针对这一难题,我们进行了工艺革新,采用粘接技术装配油泵。
I plant 1105 monomer pump, the positioning of the plunger sleeve cylindrical pin positioning. Oil pump housing pin hole is elongated hole, hole depth 16mm, pin length 16mm. As the pin hole diameter is small and deep, so the process is not easy to ensure accuracy. In the design of the pin and pin hole with the interference as the interference fit: pin hole 3 ~ (+0.014) mm, pin 3 _ (+0.004) ~ (+0.01) mm. However, the product also requires that the pin does not fall out of the housing during shipping and use. To this end, we have adopted the pin into the pin hole and then closing the mouth of the measures, this is not easy to assemble the operation, but also affect the appearance of quality; the same time, the pin hole size tolerance can not be remedied, easily lead to waste . In response to this challenge, we conducted a technological innovation, the use of bonding technology assembly pump.