在机械零件中,一般都有与机体相配合的圆盘零件需要钻孔,其外径、孔圈直径、孔数都不相同(如图1)。零件上的小孔如果按划线钻孔,精度往往达不到要求。这样既浪费工时,又降低了产品质量。在小批量生产时,如果每种零件都做一套钻模,则很不经济。因此,有必要设计制造一种使用范围比较广泛的通用钻模。下面就来介绍这种钻模。 In mechanical parts, there are generally parts matching with the body needs to drill the disk, the outer diameter, diameter and hole diameter, the number of holes are not the same (Figure 1). Parts of the hole if the drilling according to the scribe, the accuracy often fail to meet the requirements. This will not only waste working hours, but also reduce product quality. In small batch production, it is uneconomical to make a set of drills for each part. Therefore, it is necessary to design and manufacture a wide range of common use of the drilling. Here’s to introduce this type of drilling.