MACHINING APPARATUS OF CRANKSHAFT AND ARM PITCH SWITCHING METHOD IN THIS MACHINING APPARATUS

摘要

PROBLEM TO BE SOLVED: To easily switch an interval between mutual cramp arms corresponding to a plurality of kinds of crankshafts with different intervals in an axial direction of a part to be machined, when a plurality of parts to be machined in the crankshafts are simultaneously machined.;SOLUTION: Arm bases 13, 15, 17, 19, 21 having cramp arms 1 for gripping a part to be machined, are provided on a unit base 23 in such a manner as being movable, close to or apart from one another. Arm pitch positioning spacers 77, 79 rotatable by spacer switching shafts 73, 75 are disposed between arm bases 13 to 21, and the interval between the cramp arms is changed by making the arm bases 13 to 21 close to one another, and by gripping any one of the gripped parts 77b, 79b and griped parts 77c, 79c of the arm pitch positioning spacers 77, 79 by means of gripping blocks 81, 83 fixed to the backside of the arm bases 13 to 21.;COPYRIGHT: (C)2009,JPO&INPIT