| 摘要 |
A device for sequentially stretched straightening a tube and bending same into a U-shape. The device includes a track for guiding a tube. A hold clamp is fixedly positioned on the track. A feed clamp is movably positioned on the track. A feed clamp is movably guided along the track between a first position adjacent the hold clamp and a second position at a stop mechanism. The stop mechanism is reciprocally shiftable along the track and is adapted to control the final increment of travel of the feed clamp during a movement thereof toward the second position. A tube cutting mechanism is oriented adjacent the hold clamp. A control activates the hold clamp to grip the tube while simultaneously effecting a movement of the feed clamp, when the clamping structure thereon is deactivated, away from the hold clamp toward the second position until it reaches the stop mechanism. Thereafter, the clamping mechanism on the feed clamp is activated to grip the tube and the feed clamp is moved to the second position thereof to cause the tube to be stretch straightened. The clamping mechanism on the feed clamp is deactivated following an arrival of the feed clamp at the second position to release the tension accumulated in the tube followed by a reactivation thereof and a deactivation of the clamping structure on the hold clamp.
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