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在学习兄弟厂拉削式丝锥经验的基础上,燎风厂于一九七三年五月设计了双头拉削式丝锥,在一九七四年四月试验成功,并投入了生产。从一九七四年下半年起,在产品零件加工上推广应用这项经验。双头拉削式丝锥的加工过程是将丝锥放入工件孔中,把工件轻轻夹持在卡盘上,然后摇动大拖板手柄,使装在刀架上的辅具内孔进入丝锥柄部,插上插销,压上开合螺母,使机床主轴点动,待整个传动系统间隙消除(即大拖板随着主轴转动而产生位移)后,把工件紧紧地夹持在卡盘上,即可开车拉削。工件每回转一转,大拖板移动一个螺纹导程。当刀具离开
Based on his experience in broaching taping at Brother Factory, Lloyds Factory designed a double-ended broaching tap in May 1973, which was successfully tested and put into production in April 1974. From the second half of 1974, this experience has been promoted and applied in the processing of product parts. Double-head tapping tap processing is the tap into the workpiece hole, the workpiece gently grip the chuck, and then shake the handle pallet, so that the auxiliary hole in the tool holder into the taper shank Department, plug the bolt, the pressure on the opening and closing nuts, the machine spindle jog, until the entire transmission system to eliminate the gap (that is, when the big carriage with the spindle rotation and displacement), the workpiece tightly clamped in the chuck , You can drive broaching. Each revolution of the workpiece, the large carriage moves a thread lead. When the tool leaves