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US 4,380,917 AGranted
Tube-bending machine
AssigneeHitachi, Ltd.
InventorsFumihiko Uchida, Kazuo Sato, Soji Takahashi
Life of this patent
Estimating the term…
Abstract
This invention relates to a tube-bending machine, which is so constructed that force detection means to detect a force acting in the axial direction of a mandrel under a tube-bending operation is disposed on the mandrel of tube-bending means so as to sense bending conditions such as a lubrication condition of an inner surface of a tube being bent and a mandrel position, and further that fluctuations from predetermined bending conditions, of the bending conditions during the tube-bending operation are detected and corrected.
Claims9
A tube-bending machine comprising:
- a mandrel,
- bending means to bend a tube with said mandrel inserted in said tube, and
- force detection means for detecting a force acting on said mandrel in an axial direction of said mandrel during bending of the tube by said bending means, so as to sense a bending condition of said tube.
Dependencies are inferred from the claim text.