| 摘要 |
The invention relates to a method of embossing heat exchanger plates in several steps by a pressing tool, in that after a portion of the sheet blank has been embossed a subsequent portion of the blank is embossed, after this has been positioned and fixed in place between the punch and the die of the press. The positioning and clamping takes place in such a manner that a groove with zigzag extension pressed at the preceding embossing step in the sheet is caused to engage between a groove and, respectively, a bead arranged in the punch and the die which prior to the embossing are moved against each other and inside of the plane of the punch and, respectively, die by spring force. |
