| 摘要 |
PCT No. PCT/FI96/00214 Sec. 371 Date Oct. 20, 1997 Sec. 102(e) Date Oct. 20, 1997 PCT Filed Apr. 19, 1996 PCT Pub. No. WO96/33031 PCT Pub. Date Oct. 24, 1996A method for joining two or more metal parts (1, 2) together. According to the invention, the joining is carried out by using roll forming techniques by placing the metal parts (1, 2) on top of each other on the form face (7) of a tool (4) which is made to rotate, and by arranging the topmost part (1) in linear roll contact with a forming tool (6) which is also in rotational movement, whereby the malleable deformation of the metal in the slot between the tools integrates the parts together. A mesh or perforated plate (2) of harder metal in particular can be joined to the sheet-like part (1) of a softer metal by using roll forming, by making the metal ingredient of the latter to penetrate the apertures (12) in the former. The invention can be applied in the manufacture of frying pans or other cooking vessels which are provided with induction-heated bottoms by joining, for example, a magnetic steel mesh or perforated plate to the bottom of a vessel made of aluminum, as part of the forming of an aluminum blank into the form of a vessel by using roll forming. |
