Document Type and Number:
Japanese Patent JPS5726885
Kind Code:
B2
Abstract:
Apparatus for controlling operative positioning of individual blades in a cutter head assembly of a type which may be used for cutting "blind" arcuate slots in a workpiece, such as the seal slots required for rotors of rotary, combustion engines. A plurality of blade-holding structures, and their associated blades, is positioned about a circumference of the cutter head. Each blade-holding structure is mounted so as to be independently movable axially relative to the cutter head to thereby provide for successive and progressive engagement and disengagement of individual blades with the workpiece as the cutter head rotates during a cutting operation. A portion of each blade-holding means is carried within a fluid chamber which communicates with a fluid pressure system so as to normally urge each blade-holding structure toward its cutting position. In addition, a stop limit means is contained in the fluid chamber to limit the movement of each blade-holding means in a cutting direction. Each stop limit means is arranged to create a dash pot effect with fluid contained in the chamber during final increments of movement of the blade-holding means to its extended limit position. This arrangement reduces shock and vibration in the cutter head assembly and minimizes noise during operation of the assembly. Also, the dash pot effect eliminates any tendency for the blade-holding structure to bounce as it moves very rapidly to its limit position for cutting a slot.
Application Number:
JP7780773A
Publication Date:
June 07, 1982
Filing Date:
July 10, 1973
Export Citation:
International Classes:
B23C5/00; B23C9/00; B23D3/00; B23D5/02; (IPC1-7): B23D5/00