| 摘要 |
A method of sequentially manufacturing a hollow knock pin avoids distortion due to the large forces of shearing. A rounded corner of a deep-drawn cup shape is supported closely both on the inside radius and on the outside radius by curved walls matched to the cup's surface. The bottom of the cup is punched out close to the rounded corner. Due to the close support, no distortion occurs during the shearing operation. The close support also permits the pin bore to be smoothed by plastic deformation of the metal, without elastic deformation of the lip adjacent to the rounded corner.
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