Fixture units for the multi-sided machining of workpieces

摘要

The fixture units are provided for the five- and multi-sided machining of several workpieces in one set-up on CNC machine tools. The work holder 11 is radially fixed in the hydraulic centring, clamping, dividing and indexing device 33, drawn axially against the flat face and clamped at the shank. In order to completely machine workpieces from five or more sides, several operations and set-ups were necessary with conventional clamping means. The defect rates increased due to the repeated loading and re-setting. In addition, setting, execution and holding times as well as production and final manufacturing costs increased considerably. Fig. 1 For use on CNC machines, the hydraulic centring, clamping and dividing devices 33 are fitted, for example, in a parallelepiped block 10 which is mounted between a rotary table 42 and a counterstay 49. For the machining, the parallelepiped block 10 can now be swivelled through any angle, or the work holder 11 in the hydraulic centring, clamping and dividing device 33 can be turned circularly with an appropriate turn tool 32 by the machine movement at the rotary pin by any graduation number or an angular degree which can be multiplied according to the spacing of the prismatic recesses. After the machining is complete, the preset work holders 11 can be inserted and exchanged manually by the machine operator or in an automated manner by means of robots. <IMAGE>