| 摘要 |
PCT No. PCT/GB83/00246 Sec. 371 Date May 10, 1984 Sec. 102(e) Date May 10, 1984 PCT Filed Oct. 3, 1983 PCT Pub. No. WO84/01530 PCT Pub. Date Apr. 26, 1984.A tool, and method, for making the outer member of a constant velocity universal joint of the cross-groove type, the outer member being of hollow form having in its interior two sets of helical grooves of opposite hand. The tool comprises first and second parts 15, 21 mounted for axial movement relative to one another, the parts having portions 23, 17 which can be brought into and out of mutual intercalation by such axial movement, the portions 17 carrying projections 18 which form the grooves of one hand and the portions 23 carrying projections 24 which form the grooves of the other hand. When the tool is used to produce a joint outer member by being placed in a hollow blank which is forced through a die to form the material of the blank around the projections, the tool is withdrawn from the formed blank by helically withdrawing the portion 23, with its projections 24 moving along the grooves formed thereby, followed by helically withdrawing the portion 17 with its projections 18 moving along the grooves which they have formed. |
