| 摘要 |
A punching tool comprises a head 10 mountable in a machine and a number of punch parts 18 mountable in said head, where the cutting portions 19 are formed in different ways 19, 24-26. The head is at one end provided with a transverse groove 12 with an adjacent central bore 15. The punch part 18 comprises a straightedge 20 fitting accurately into the groove 12 and a rising shaft portion 22 adapted to fit in the bore 15. The shaft portion is provided with an oblique face 23 for cooperating with a locking screw 17 in the head, whereby the face is thus formed that the straightedge 20 tends to be pressingly fixed against the bottom of the groove 12. Expediently, the head is cylindrical and provided at its end facing the machine with two aligning faces 27, 28 forming an angle between them, by means of which the cutting portion 19 may be orientated relative to the workpiece. <IMAGE> |
