| 摘要 |
<p>The process is used to form the rim flanges (5a,6a) of an automobile wheel (1) from a split blank, using a vertically descending punch and a fixed matrix to form the first flange whilst a vertically ascending punch (20) and a second fixed matrix (18) form the second. Both matrices are of a compound construction generally incorporating two pieces connected by joining pieces, the latter being rigidly connected to the blank-grips (17) on the one hand and to the fixed part of the press forming the work table on the other. Both punches have a shape appropriate to the desired finished profile of the respective half rims.</p> |
