| 摘要 |
<p>The invention makes use of the controlled, differential application of heat to effect dimensional control in the slitting or stamping of metal workpieces. In a principal embodiment (Fig. 1), a metal strip (40) supplied from a reel (2) is slit into narrower strips by a slitting mechanism (12,13) and the slit strips (41) are reeled up separately (at 23). A controllable heating apparatus (8, 9) is provided before the slitting mechanism (12, 13) and is arranged to effect heating of the strip (40) in a controlled manner which varies across the width of the strip (40) to compensate for variable tension in the strip across its width. Other applications of controlled, variable heating are also described.</p> |
