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在我厂生产制革机械的任务当中,削匀机刀胎上的螺旋槽导程为246毫米,螺旋升角32°20′,螺旋头数z=9。这样大导程在车床上无法进行加工。如果采用靠模,又不能解决分度和螺旋槽方向的改变问题。后来,我仍通过技术革新,把皮带车床改装成适应大导程多头螺旋槽加工需要的铣床,它的传动原理如图1所示。这样不仅解决了生产关键,同时这种革新简单,经济,容易实现。工作时摇动手轮37(见图2),使蜗杆蜗轮转动,蜗轮上的拨杆3就带动工件9转动。同时通过与蜗杆轴键连接的链轮14,把运动传递给锥齿轮,最后使丝杠35转动,带动大拖板沿轴向移动,就能完成螺旋线的加工。工件转一圈,铣刀必须移动一个螺距。如果假设蜗杆头数为1,蜗轮齿数
In my factory production of leather machinery tasks, sharpening machine spiral groove on the lead 246 mm, helix angle 32 ° 20 ’, the number of spiral head z = 9. Such a large lead in the lathe can not be processed. If you use the model, but also can not solve the indexing and spiral groove direction change problem. Later, I still through technological innovation, the conversion of the belt lathe to adapt to large-diameter long spiral groove machining needs of the milling machine, its transmission principle shown in Figure 1. This not only solved the production of the key, at the same time this innovation is simple, economical and easy to achieve. Shake the handwheel 37 (see Figure 2) during work to turn the worm gear and the lever 3 on the worm gear to rotate the work piece 9. At the same time, the sprocket 14, which is connected with the worm shaft key, transmits the movement to the bevel gear. Finally, the screw 35 is rotated to drive the large carriage to move in the axial direction, thereby completing the processing of the spiral. Turn the workpiece, the cutter must move a pitch. If you assume that the number of worm 1, worm gear teeth