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桥机厂在推广应用“优选法”中,把推广“优选法”和技术革新结合起来,提高了工作效率。例如:在一台普通车床上加工工作物的内孔,材料是45号钢,孔径为47mm,长度为600mm,光洁度要求▽▽_4。过去,加工这样的孔,必须先钻一40mm的孔,然后再用扩孔车刀扩大到47mm,这样加工效率很低,内孔出现大小头,不符合质量要求。在推广“优选法”运动中,工人群众开动脑筋,采用以钻代扩的办法,即用钻孔代替扩孔,这要求钻头必须磨好,然后用“优选法”在固定进刀量的情况下选择转速。
Bridge Machine Factory in promoting the application of the “Law”, the promotion of “Law of Choice” and technological innovation combined to improve work efficiency. For example: in a common lathe processing work bore, the material is 45 steel, a hole diameter of 47mm, a length of 600mm, finish requirements ▽ ▽ _4. In the past, such a hole must be drilled with a hole of 40mm before it is expanded to 47mm with a reamer, so that the machining efficiency is very low and the size of the hole is large and does not meet the quality requirements. In popularizing the “Law of Optimal Choice”, the working masses started their brains and adopted a method of replacing the reaming by drilling instead of reaming, which requires that the drill bit must be ground well and then be selected with the “preferred method” at a fixed feed rate Rotating speed.