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在从事生产和维修建筑、建材、冶金等机械中,经常碰到经过加工后的环形工件,为下一道工序钻孔、攻丝的划线,因没有圆心可作为基准点,故比较麻烦。为此,我们在实践中设计、制作如图示划线器。一、构成用内孔φ80(或>φ80)×10×10的环,将此环按直径锯切成二个半环,沿圆周方向每隔15～20mm钻φ6通孔,取一半环在另一侧钻、攻M4螺孔,另一半环在相距最远φ6两孔处分别紧配φ6×20圆柱销,并在下端留出10mm(或>10mm)在一只圆柱销顶端用硬质合金焊上且磨尖;在另一圆孔处紧配向上露出20mm的M6螺钉。将
In the production and maintenance of buildings, building materials, metallurgy and other machinery, often encountered after the processing of the ring-shaped workpiece, drilling for the next process, tapping the line, because there is no center can be used as a reference point, it is too much trouble. For this purpose, we design and manufacture the graphic scribe in practice. First, to form a ring with inner hole φ80 (or >φ80)×10×10, cut the ring into two half-rings according to the diameter, drill φ6 through holes every 15 to 20mm in the circumferential direction, and take half of the rings in another Drill and attack the M4 screw hole on one side, and match the φ6×20 pin with the φ6×20 pin at the farthest φ6 hole respectively, and leave 10mm (or >10mm) at the lower end with a hard alloy at the tip of a cylindrical pin. Solder and sharpen; tightly fit 20mm M6 screws upward at the other round hole. will