JPS5545528A - Roll die mounting method in forging rolls of the like - Google Patents

Abstract

PURPOSE: To make dies removable rapidly without using welding and obviate giving flaws to products by dividing the roll die to two dies of the specific shapes of 180° or under and fitting these with each other when the roll die does not permit fitting from the roll axis direction and is 180° or over in the angle that is assumes to the roll axial center in cross section.

CONSTITUTION: Since the angle θ that the roll die assumes to its roll axial center O is 180° or over, the roll die is divided to a main die 3 and auxiliary die 8 whose angle is less than 180°. First, the die 8 is fitted to the shaft 1 and its movement in the circumferential and axial central direction is stopped by a fitting key 9 and a fixing device. Next, the die 3 is fitted from above and is similarly fixed by a fitting key 10 and fixing device. The opposing faces of the die 8 and die 3 have the slope 80 of about 30W45° in the angle α that they assume to the line A and an extending part 81 in the die 3 bottom direction from the bottom end thereof. The top surfaces thereof are the bottom surface 82 extending in the circumferential direction and the slope 83 aligning to the perpendicular line C. The angles β that the line connecting the center of the face 82 and the axis O and the faces 80, 83 assume are the same. The opposing faces of the 3 are approximately symmetrical to the abovementioned faces but the crest type face 31 is so arranged to have a slight clearance from the face 82.

COPYRIGHT: (C)1980,JPO&Japio