Patent ID: 7694613
Filing Date: 2010-04-13
Classification: B23D,B60W,Y10T

Abstract:
1. A tool device for high-speed crosscutting a workpiece, comprising: a striking unit comprising a striking piston supported and driven by a driving portion of the striking unit; a tool housing; a damper unit; a movable crosscutting tool movably arranged within said tool housing; a fixed crosscutting tool fixedly arranged within said tool housing; said striking piston arranged to administer a force to the movable crosscutting tool; said fixed crosscutting tool arranged to exert a detaining force upon the workpiece; and said damper unit constructed and arranged to brake the striking motion of said movable crosscutting tool; wherein the tool housing has at least two supporting surfaces for positioning said movable crosscutting tool, said supporting surfaces being curved and having a same radius, wherein a piston access recess is constructed and arranged between said curved supporting surfaces to provide a space through which said striking piston moves, and wherein said movable crosscutting tool has curved edge surfaces in contact with said curved supporting surfaces of said tool housing, said curved edge surfaces having a substantially similar radius as said curved supporting surfaces to assist in alignment of said tool device.