| 摘要 |
PROBLEM TO BE SOLVED: To straighten strain in the radial direction in the opening part of a workpiece in an insertion tool, a device and a method for straightening strain for straightening the strain in the opening part of a turbine runner, a pump impeller, etc. of a torque converter. SOLUTION: In this insertion tool (6) for straightening the strain in the opening part (71) by inserting and fitting the tool into the opening part (71) of the workpiece (7), the insertion tool (6) has an insertion part (61) and a small-diameter part (63) in this order from the side to be inserted into the opening part (71). The peripheral surface of the insertion part (61) is formed into a tapered shape so that the outside diameter of the insertion tool (6) is made gradually larger from the side to be inserted into the opening part (71) and the maximum outside diameter of the insertion part (61) is not less than the inside diameter of the opening part (71). The diameter of the small-diameter part (63) is smaller than the inside diameter of the opening part (71). COPYRIGHT: (C)2010,JPO&INPIT
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