一、结构钻模体1上有在同一条中心线上的两条调整槽,调整块3上装有可换钻套4,钻套外圆与调整槽滑动配合,用以调整等分孔直径,调整块调整好后用螺钉固定。钻模体上有与调整槽中心线夹角为:30°、45°、72°、90°、120°的五条定位槽,分别用以钻二、三、四、五、六、八、十、十二等分孔的定位。钻模板背面铣有20×2三等分均布槽,装有三块活动定 First, the structural drilling body 1 has two adjustment grooves on the same center line, the adjustment block 3 is provided with a changeable drill sleeve 4, the outer circumference of the drill sleeve slides with the adjustment groove to adjust the diameter of the equal hole, Adjustment block is adjusted with screws. There are five positioning grooves on the die body which are included with the center line of the adjustment groove at 30 °, 45 °, 72 °, 90 ° and 120 ° for drilling two, three, four, five, six, eight and ten , Twelve equal hole positioning. Drilling the back of the template milling 20 × 2 trisection uniform groove, equipped with three activities set