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我厂李果珍同志改进了在立式钻床或摇臂钻床上套料用的钻夹具。用这个夹具在钻床上套料要比在车床上套料方便得多。夹具的构造如附图所示。图中1是钻杆,尾部的锥度是莫氏4号,它跟钻床的主轴孔配合;钻杆的头部加工有M30×13的方牙螺纹,它跟钻头8相配。钻杆1的中部加工有两道螺旋导屑槽,螺旋角是35°。钻杆1的中间还加工有孔。2是压帽,跟法兰盘3相配。法兰盘3用螺钉4固定在件5上。6是毡圈。7是压圈。
Comrade Li Guozhen, our factory, has improved drilling jigs for nesting on vertical drilling machines or radial drilling machines. It is much more convenient to use the jig to set the material on the drill than it does on the lathe. The structure of the jig is shown in the drawing. Figure 1 is the drill pipe, the tail of the taper Mohs 4, which with the drill spindle hole with; drill head processing M30 × 13 square thread, which matches with the drill 8. The middle of the drill pipe 1 is machined with two spiral chip flutes with a helix angle of 35 °. The middle of the drill pipe 1 is also machined with holes. 2 is the pressure cap, with the flange 3 match. Flange 3 with screws 4 is fixed on the piece 5. 6 is a felt ring. 7 is the pressure ring.