过去我们在加工锤锻模下模分型面上两圆弧(见图示)时,采用牛头刨按照划线进行加工,工效低,光洁度差,给钳工带来较大的工作量。在伟大的批林批孔运动中,以大实践论多为指导,虚心向老工人请教,努力为革命钻研技术,在同志们帮助下,经过反复改进,终于革新成功了如图所示的双圆弧组 In the past when we were processing the two circular arcs on the parting surface of the hammering die (see illustration), the machining was performed according to the scribing line with a bullhead. The work efficiency was low and the finish was poor, which brought great workload to the fitter. In the great bodhisattva bodhisattva movement, guided by a large amount of practice, humbly asked for advice from the old workers and worked hard to study the technology for the revolution. With the help of the comrades, after repeated improvements, the reform finally succeeded as shown in the figure Arc group