| 摘要 |
A rotary wheel member for use in a friction type, conform extrusion apparatus is made by producing a rotary wheel 10 having formed in its peripheral parts a continuous radially-extending groove, and securing in that groove an annular metal mass 76; rotating the wheel about its axis; and applying to the periphery of the annular metal mass an abutment members (36, Fig. 1) of predetermined end shape, and progressively advancing the abutment member in a radial direction as the wheel rotates whereby to machine in the peripheral parts of the metal mass a working groove 12 of predetermined cross-section, the peripheral parts of the annular metal mass being a composition which is substantially the same as that of a feedstock metal that is to be extruded in a said apparatus when equipped with the wheel member so produced. <IMAGE> |
