Rotary pipe cutting apparatus
AssigneeShinko Kikai Kabushiki Kaisha
InventorShojiro Shinbori
Life of this patent
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Abstract
The pipe rotary cutting device of this invention comprises shifter means which is operative to rotate a cylindrical body relative to a main shaft to thereby rotate an internal gear secured to the cylindrical shaft. The rotation of the internal gear rotates pinion gears secured to the main shaft to thereby rotate eccentric shafts provided coaxially with the pinion gears. Then the rotation of the eccentric shafts is converted by sliders into radial movements. A cutting tool as well as disc cutters are provided on the sliders respectively through a cutting tool holder and cutter holders. The pipe rotary cutting device of such arrangement enables the steps of chamfering and cutting to be carried out simultaneously, and accordingly the chamfering step of removing the outward burrs created in cutting a pipe is totally unnecessary.
Claims5
A pipe rotary cutting device comprising:
- roller pins;
- shifter means for moving said roller pins in an axial direction of said cutting device;
- a main shaft having slots formed therein in the axial direction so as to receive said roller pins, said main shaft having a first and second end;
- a cylindrical body disposed around the outside of said main shaft, having slots formed therein which are diagonal to the axial direction so as to receive said roller pins, said cylindrical body having a first and second end;
- an internal gear secured to said second end of said cylindrical body;
- at least two pinions to mesh with said internal gear;
- gear shafts having one end securing each pinion gear and the other end formed in eccentric shafts;
- sliders engaging said eccentric shafts so as to be slidable towards the axial center;
- a cutting tool holder disposed on one of said sliders having a cutting tool;
- cutter holders disposed on the remaining sliders having disc cutters;
- a frame pivotally connected to the first end of said main shaft, the first end of said cylindrical body and to said shifter means;
- and
- a hollow shaft inserted in said main shaft for receiving a material to be cut, said shaft having a first and second end.
Dependencies are inferred from the claim text.