| 摘要 |
A method for producing lever arms/U-clips for aluminium fastening devices for sports footwear, comprising:
- an initial step of extruding an aluminium billet to obtain a longitudinal profile (2) of cross-section corresponding to the cross-section of the lever arm/U-clip to be obtained, and provided at one end with two parallel longitudinal holes (4, 6),
- subjecting the aluminium profile to a plurality of operations such as to obtain the clip or the lever arm in finished form.
characterised by:
- subjecting the prongs (40) of the lever arm/U-clip to pressing with at least one punch (24, 26, 28) which simultaneously trims the facing surfaces of the prongs (40) and the two outer surfaces of these in the region of the holes (4, 6). |
