伏罗希洛夫机床制造厂出产的龙门刨床,工作台是用M12的直齿铸铁齿条(图1)传动的。齿条按三级精度标准制造。 最初,齿条是在专用齿条铣床上加工的,按工艺方法以五个齿条为一组,加工时需40小时的劳动量。厂内有二台齿条铣床,还是不能保证完成国家计划。 为了制造齿条,在龙门刨横 Voroshilov Machine Tool Plant produced by the planer, the table is M12 straight cast iron rack (Figure 1) transmission. Rack by third-level accuracy standards. Initially, the rack is processed in a dedicated rack milling machine, according to the process to five rack as a group, the processing time required 40 hours of labor. The factory has two rack milling machines, or can not guarantee the completion of the national plan. In order to manufacture rack, in the gantry planing horizontal