1971年我厂加工一批加热板(20号钢),加工面积较大(1.8米×10米),用高速钢精刨刀加工,刀具耐用度低,加工到中途刀具就磨损了,工件的精度和光洁度也很难保证。在时间紧任务重的情况下,车间工人、干部和技术人员积极想办法,为大打矿山之仗、支援钢铁工业作出贡献。于是对硬质合金精刨刀进行了大胆的试验。在反复实践中,改进制造出大前角宽刃硬质合 In 1971, our factory processed a batch of heating plates (No. 20 steel) with larger processing area (1.8m × 10m), processed with high-speed steel precision sharpener, low tool durability, and the tool wears halfway, the accuracy of the workpiece And finish is hard to guarantee. In the light of the heavy task of time, workshop workers, cadres and technicians are actively seeking ways to contribute to the battle of the mines and supporting the steel industry. So hard carbide planer for a bold test. In repeated practice, to improve the manufacture of wide-angle hard ankle joint