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用C 6136N型车床加工切削力较大的工件时,经常出现夹紧机构夹不紧、使尾座后退,影响加工顺利进行。产生原因是原结构不合理,偏心轴3(图1)穿过拉杆2轴心,偏心轴轴径较细而且较长,拉杆2与偏心轴3配合部位轴向截面尺寸小,刚度差。夹紧时偏心轴受力部位自身弯曲变形,这样,切削力产生的振动使尾座整体后退。因此,我们将其改为图2所示结构在滑板1上铣削一腰形槽,增加一块压板3,利用拉杆螺栓4和偏心轴5,当不拧紧固螺母2时,可方便地进行切削力小的工件加工,例如:顶紧、
With C 6136N lathe machining cutting larger workpieces, clamping clamps often appear not tight, so that the tailstock back, affecting the smooth processing. The reason for this is that the original structure is unreasonable. The eccentric shaft 3 (FIG. 1) passes through the axis of the pull rod 2 and the eccentric shaft has a smaller diameter and a longer axial length. The axial cross section of the tie rod 2 and the eccentric shaft 3 is small in size and poor in rigidity. When the clamping force of the eccentric shaft, its own bending deformation, so that the vibration generated by the cutting force so that the tailstock as a whole backwards. Therefore, we will be changed to the structure shown in Figure 2 milling a lumbar slot skateboard 1, an increase of a plate 3, the use of rod bolts 4 and eccentric shaft 5, when not tightening the nut 2 can be easily cut when the force Small parts processing, such as: top tight,