| 摘要 |
A panel, formed from a perforated face (102), is respectively concavely and convexly curved by seriatim stretching or contracting its flanges (104a, b; 156a, b). Such stretching and contracting is produced by placing the opposed flanges within jaw halves (110a, b; 166a, b) of a jaw mechanism (110, 166), by seriatim positioning of the paired flanges between their respective jaw halves, and by moving the jaw halves away from or towards one another. Jaw movement towards one another effects a stretching function. Jaw movement towards one another effects a shrinking function. Computerization enables the panel curving to be precisely controlled. The curved panel, as it exits from the panel curving machine (126, 148) is supported on rollers (146) or, more precisely, by a scissor apparatus (176). The scissors apparatus includes roller sets (242, 244, 246) which are positionable, relative to one another, to conform the roller sets to the curvature of the exiting panel. The implementing mechanisms are mainly hydraulically operated.
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