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在工业生产中,常需在材料不同的组合件上钻孔,如经常遇到的止动螺钉孔。钻孔时,若被加工工件材料相同,一股还不会钻偏,但若为不同材料,由于各种材料机械强度不同,所钻孔不可避免偏向材料较软的一方,产生钻偏现象。在维修管式铰线机垫滚时,为防止内、外套产生相对滑动,常在胶木外套与中碳钢内套相配合的结合面上钻止动孔,然后装上止动销。由于垫滚内
In industrial production, it is often necessary to drill holes in different combinations of materials, such as the often encountered screw holes. When drilling, if the workpiece material to be processed is the same, there is no offset in one direction. However, if different materials are used, due to the different mechanical strength of the various materials, the boring is inevitably biased towards the softer material and leads to the phenomenon of bias. In the maintenance of tubular hinge machine pad roll, in order to prevent the relative slip between the outer jacket, often in the bakelite jacket and carbon steel inner sleeve with the mating surface drill hole, and then install the stopper pin. As the pad rolls inside