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在车床上加工两端带中心孔的导柱、轴类零件的时候,通常都是用鸡心夹头装夹加工。这种加工方法,装夹时间长,需要二次“调头”,生产效率低,同一鸡心夹头加工的直径范围小。我们设计了一种快速夹紧的弹簧顶尖,其结构如图所示。工件5左端的中心孔对准活动顶尖4,压缩弹簧2,当顶紧车床尾座顶尖6时,锥体3的右端面齿便牢牢地嵌入工件的左端面,切削过程产生的轴向切削力,使工件更加牢固地嵌入端面齿中。这种快速夹紧的弹簧顶尖,经八二七○厂等单位长期使用证明,具有:通用性强,夹紧力大,牢固可靠,装夹辅助时间极短,装夹方便,不损伤已加工外圆表面,不需要二次“调头”,结构简单,寿命长等优
Machining both ends of the center hole in the lathe guide column, shaft parts, usually with the heart-shaped chuck chuck processing. This processing method, clamping a long time, the need for the second “U-turn”, the production efficiency is low, with a heart-shaped chuck processing diameter range. We designed a fast clamping spring tip, the structure shown in Figure. The center hole of the left end of the workpiece 5 is aligned with the movable center 4 and the compression spring 2. When the top of the lathe tailstock 6 is tightened, the right end face tooth of the cone 3 is firmly embedded into the left end face of the workpiece. Force, so that the workpiece more firmly embedded in the face teeth. This fast clamping spring center, the 8,270 factories and other units long-term use of proof, with: versatile, strong clamping force, solid and reliable, a very short time to set up a folder, easy to install, without damage has been processed Cylindrical surface, does not require secondary “U-turn”, the structure is simple, long life and other advantages