我厂三瓣式分块字头(见图)毛坯,过去一直是打锻件或由库房直接下料加工而成。为节约轴承钢材,充分利用锻造和车削加工中的报废工件,我们改进了字头设计方法,先按各种轴承套圈的打印中心圆直径选定合适的废套圈作字头毛坯;再以选定的废套圈的几何尺寸为依据,设计字头的几何尺寸。各种字头毛坯所选用的废套圈型号见右表。 I plant three-block sub-prefix (see photo) rough, the past has been forging pieces or by the Treasury directly from the expected processing. In order to save the bearing steel and make full use of the scrapped parts in the forging and turning, we improved the design method of the prefix by selecting the suitable waste ring as the prefix blank according to the circle diameter of printing center of each bearing ring; The geometry of the selected waste collar is based on the geometry of the prefix design. All kinds of prefix blank ring used to select the type of ring see the right table.