PURPOSE: To improve cutting accuracy to ensure durability and quality reliability by providing a disk-like upper edge having a sharp outer circumferential end, a disk-like lower edge having a flat outer circumferential end and a holding means which contacts both the edges each other in a same plane.
CONSTITUTION: An upper edge 1 and a lower edge 2 are kept in a same plane, brackets 3, 3 are linearly moved in a predetermined direction with keeping identical relation by the drive and rotation of a motor 9. The upper edge 1 has a sharp end at the top end of the outer circumferential end thereof and the lower edge 2 has a flat end. Consequently, when a long and narrow material of aluminum 6 as a work is introduced between the upper edge 1 and the lower edge 2 and both the edges 1, 2 are rotated to cut the long and narrow material 6, even if the top end of the upper edge 1 is slightly moved leftward and rightward due to cutting resistance, since there is a room between the flat end of the lower edge 2 and the top end of the upper edge 1, the production of burrs and chips can be prevented caused by cutting, without the offset of the center line for cutting and the tearing-off of the long and narrow material of aluminum 6.
KUSANO MITSUO
KATANO KOICHI
| JPS6426190U | 1989-02-14 | |||
| JPS63123691A | 1988-05-27 |