| 摘要 |
1394960 Deep drawing sink unit tops SMG SUDDEUTSCHE MASCHINENBAU - GmbH 17 Dec 1973 [18 Dec 1972] 58286/73 Headings B3A and B3R A sheet metal sink with two basins is made by applying fluid pressure to pre-draw the basins in one direction and then reverse drawing them hydro-mechanically. The metal sheet 7 is clamped by a holder 9 against a block 1 having two chambers filled with fluid 2 through a non-return valve 3. At least one piston 8 pressurizes the fluid 2 to pre-draw the basins, Fig. 1, after which they are reverse drawn, Fig. 2 (not shown), by upper dies 10 having lubrication ducts 11. During reverse drawing, the sheet 7 slips beneath the holder 9 except at the web 5. |
