B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
153/19
B21D 7/00 (2006.01) B21D 9/03 (2006.01)
Patent
CA 1309002
ABSTRACT A bending apparatus is provided for rectangular tubes. The apparatus comprises a bending die, a wiper die, a clamp die, a pressure die and a mandrel. The clamp die and pressure die are provided with tongues which are engageable in corresponding grooves in the bending and wiper dies. The tongues and the clamping and pressure surfaces of the respective dies are dimensioned to enable the rectangular tube to be bent about either of its two axes by placing the tube on either of the opposed sides of the respective tongues. The tongue of the pressure die is movable to facilitate the tangential advancement of the pressure die under the action of a booster for urging the tubing into the bend. The mandrel includes a plurality of movable blocks. A plurality of springs intercon-- nect the blocks to facilitate alignment. The blocks are mounted to a replaceable head which can be removed and replaced when worn. The mandrel includes channels for lubrication.
615710
Ap Industries Inc.
Moffat & Co.
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