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画完夹具总图后应该在图纸上标注出有关的尺寸公差及技术条件。这些公差和技术条件制订的主要根据是被加工工件的工序精度和技术要求。因为夹具是由许多零件装配起来的,装配后应当保证工件在该工序的定位精度,同时也要兼顾到夹具本身的制造工艺和达到精度的方法。因此可见夹具总图尺寸公差及技术条件制订得是否正确合理,对保证产品质量和夹具制造成本都有密切的关系。一、夹具总图上应该标注那些尺寸及技术条件通常在夹具装配图上应该标注以下几项基本尺寸和技术条件:1.夹具外观轮廓尺寸对于移动式、升降式和迥转式夹具还应标出其运动范围,即移动和升降的极限位置尺寸、迴转的角度等,以便检查夹具是否和机床部件或刀辅具相碰撞。
Draw the fixture after the general plan should be marked on the drawings on the dimensional tolerances and technical conditions. These tolerances and technical conditions to develop the main basis for the processing of the workpiece accuracy and technical requirements. Because the fixture is assembled from many parts, the positioning accuracy of the workpiece in the process should be ensured after the assembly. At the same time, the manufacturing process of the fixture itself and the method to achieve the precision are taken into account. Therefore, it can be seen that the overall size tolerance of the fixture and the technical conditions are correct and reasonable, which are closely related to the quality assurance of the fixture and the manufacturing cost of the fixture. First, the fixture on the map should be marked on the size and technical conditions Usually in the fixture assembly drawing should be marked on the following basic dimensions and technical conditions: 1. Fixture outline dimensions For mobile, lift and turn the fixture should also be marked Out of its range of motion, that is, the size of the limit position of the move and lift, the angle of rotation, etc., in order to check whether the fixture collides with the machine tool components or knife aids.