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“对刀”是镗削工作中一项麻烦的操作。附图是笔者建议的镗杆结构及对刀分厘卡结构,能保证1～2级精度,并预先知道将要镗削的一刀完毕后的准确尺寸。现以φ80镗杆为例,将这工具的结构及使用说明如下。在镗杆的中心钻铰一φ80孔,将铣有平面的圆柱形刀头2装在孔内。支头螺丝3(M14×1.5)和带有内六角孔的支头螺丝1(M20×1.5)是调整和紧固刀头用的。专用分厘卡由一个拆去原架子不用的普通分厘卡7,另配以一个专用架子5组成。架子5用一块30毫米厚的40X钢板制成,并经过正火和调质处理。架子上车出一φ80圆弧,与镗杆精密滑配。同时按附图所示沿轴线方向车一小孔,与分厘卡7的杆部紧配,并
“Knife” is a bothersome operation in boring work. The figure is the author of the proposed boring bar structure and the perturbation PCT card structure, to ensure the accuracy of 1 to 2, and predict in advance to know the exact size of a knife to be boring. Now φ80 boring bar, for example, the structure of the tool and use as follows. In the center of the boring bar, a φ80 hole is drilled, and a flat cylindrical cutter 2 is mounted in the hole. The head screw 3 (M14 × 1.5) and the head screw 1 (M20 × 1.5) with hexagon socket are used to adjust and secure the head. Dedicated cent card by a demolition of the original shelf without the ordinary points card 7, reprovisioned with a special shelves 5 composition. Shelf 5 is made of a 30 mm thick 40X steel plate and is normalized and tempered. Shelf car out of a φ80 arc, and boring bar precision sliding. At the same time as shown in the figure along the axis of the car a small hole, and the cent of the card 7 of the tight fit, and