论文部分内容阅读
图1为我厂生产的ZL50装载机主传动锥齿轮磨内孔工序之简图,用原来定位方法,磨出来的工件内孔和节圆不同心,为解决这一问题,我们改进了设计,采用了图2所示的结构,达到了预期的效果。 1.夹具结构及其特点本夹具由定位、夹紧两部分组成。钢球7在挡片6的保持下在节锥处实现齿轮的轴向及径向定位。带有锥形夹紧面的球面压块8在螺纹套9、弹簧10的作用下,通过导向螺母2实现了对工件的浮动夹紧。浮动夹紧消除了夹紧过程中可能产生的与定位的干涉,从而防止了工件被夹偏、卡死的情况;导向螺母2与本体3之间有导向,保证夹紧过程中两者始终同轴,为防止干涉,螺纹配合采用了较大的间隙。从而消除了夹紧过程中出现夹偏的可能性;夹紧力与工件轴线保证了平行。磨完内孔后工件达到了工艺要求。
Figure 1 is a schematic diagram of the ZL50 loader main drive bevel gear grinding bore hole production process of our factory. With the original positioning method, the inner hole and the pitch circle of the workpiece are not concentric. To solve this problem, we improve the design, Using the structure shown in Figure 2, to achieve the desired results. 1. Fixture structure and its characteristics The fixture by the positioning, clamping two parts. The ball 7, with the retaining pieces 6 held, achieves the axial and radial positioning of the gear at the pitch cone. The spherical pressure block 8 with a tapered clamping surface achieves the floating clamping of the workpiece by the guide nut 2 under the action of the threaded sleeve 9 and the spring 10. Floating clamping to eliminate the clamping process may occur with the positioning of the interference, so as to prevent the workpiece is clamping deviation, stuck; guide nut 2 and the body between the 3 guide to ensure that the clamping process are always the same Shaft, in order to prevent interference, thread with a larger gap. This eliminates the possibility of pinching during clamping; the clamping force is parallel to the workpiece axis. Grinding the hole after the workpiece reached the process requirements.