Patent ID: 7587922
Filing Date: 2009-09-15
Classification: B21D

Abstract:
1. A hemming machine comprising: a frame; a hemming tool support structure rotatably coupled to the frame to rotate about a center rotation axis, the hemming tool support structure including a hemming tool disposed at a first location such that the hemming tool moves towards and away from an edge part of a workpiece that is supported on a die upon rotation of the hemming tool support structure about the center rotation axis; and a swinging drive structure operatively arranged between the frame and the hemming tool support structure to transmit a rotational driving force to the hemming tool support structure via a releasable connection located on a side of the center rotation axis that is opposite of the hemming tool, the releasable connection being configured to release the swinging drive structure to allow further rotational movement of the hemming tool away from the die, the releasable connection including a first segment member attached to the swinging drive structure, and a second segment member attached to the hemming tool support structure, with the first and second segment members being detachable and reattachable by a coupler.