UNIFORMIZING MECHANISM FOR THERMAL DISPLACEMENT OF OPPOSING MAIN SHAFT BASE

PURPOSE:To reduce the difference in the temperatures of both main shaft bases and to improve the work accuracy, by fitting both the end parts of a heat pipe to the relative parts of opposing main shaft bases in the mechanism uniformizing the thermal displacement amount of the opposing main shaft bas...

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Hauptverfasser: YUZUHARA HIDEO, KAGAMI TOSHIO
Format: Patent
Sprache:eng
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Zusammenfassung:PURPOSE:To reduce the difference in the temperatures of both main shaft bases and to improve the work accuracy, by fitting both the end parts of a heat pipe to the relative parts of opposing main shaft bases in the mechanism uniformizing the thermal displacement amount of the opposing main shaft bases of a machine tool, etc. CONSTITUTION:A work W held by main shaft chucks 10, 11 is rotated and turning is performed by the movement in the X axial direction of cutting tool posts 22, 23 and the simultaneous movement in the Z axial direction of main shaft rams 4, 5. The temperatures of main shaft rams 4, 5 rise with the lapse of the operation time. At this time, in the case that both main shafts 8, 9 are rotated by being changed over to both the drivings after being operated for a fixed time by one side driving, for example, the temperatures of the relative positions of main shaft base main bodies 2, 3 and main shaft rams 4, 5 become different. Now the temperature difference of the lower side of the man body 2 of an A main shaft base and that 3 of a B main shaft base is uniformized by a heat pipe 30 and the temperature difference of the upper side by a heat pipe 32, and the difference in the thermal displacement amounts of each part is reduced.