PRECISION LOCATION AND LOW FORCE REPOSITIONING OF POWDER METAL COMPONENTS

摘要

A bearing cap that is bolted to a bearing support structure with integral bosses interfering with counterbores in the structure to create deformation that enables precise repositioning of the bearing cap to the structure with relatively low initial pressing and extraction forces. One of the bosses has two relatively wide lobes and the other boss has 4-10 lobes, with the lobes on each boss diametrically opposed from one another. The bosses on both lobes can be oriented so that none of them are on the lateral axis of the bearing cap through the bolt holes. Interference on the effective diameter between the bosses and the counterbores is within the range of 25 - 300 microns. The bosses can be formed with a compound radius that reduces the width of contact toward or to line contact at the base of the boss.