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在生产中经常会遇到一些有圆周等分孔的零件,如用划线分度定孔,对精度要求较高的零件,很难达到设计要求;若专门制造钻模,由于设备条件所限,又有困难.我们农机站根据本身设备能力,自己设计制造了一种简易的分度钻孔夹具(见图). 该夹具由分度板、芯轴、固紧螺母和定位销四部分组成.除分度板的分度孔要求分度精密需要外厂协作外,其它零件只要有一台普通车床就可自制.它由分度板与直径200毫米的三爪卡盘用内六角螺钉同心地紧固在一起,成为夹具体.其同心度是由分度板上直径180毫米的凸台与三爪卡盘的内台肩配合来保证的.使用时,通过芯轴将夹
In production often encounter some equal parts with circumferential holes, such as marking the hole with a sub-scribing, the higher precision parts, it is difficult to meet the design requirements; if the special manufacture of drilling die, due to equipment constraints , There are difficulties.Our farm machinery station according to their own equipment capabilities, their own design and manufacture of a simple indexing drilling fixture (Figure) .The fixture consists of indexing board, mandrel, tighten the nut and the positioning pin four parts In addition to indexing indexing holes require precision indexing needs outside plant collaboration, the other parts as long as there is an ordinary lathe can be made by the indexing board and diameter of 200 mm three-jaw chuck with concentric hex screws Fastened together to become a clamp body.The concentricity of the indexing plate by a diameter of 180 mm bosses and three-jaw chuck with the shoulder to ensure that, when used, through the mandrel will clip