Measuring instrument with provision for interchangeable holding

Details Measuring instrument with provision for interchangeable holding Measuring instrument with provision for interchangeable holding

1986-11-07

1987-08-25

Weidenfeld, Gil

Metal working

Plural diverse manufacturing apparatus including means for...

Type of machine

29568, B23Q 3155

Patent

active

046883070

ABSTRACT:
The invention concerns a receiver (1) in the probe head of a multiple-coordinate measuring machine in which probe-pin combinations (21) can be replaceably chucked with high precision with respect to their position in space. The receiver contains an isostatic three-point support (14) against which the base (15, 16, 17, 18, 19) of the probe-pin combination is drawn by an electrically operated clamping device. The clamping device is coupled with the control computer of the measuring machine so that a probe change can be effected automatically.
In a preferred embodiment, the clamping device consists of a permanent magnet (11) and of an electromagnet (10) by which the field of the permanent magnet (11) can be selectively counteracted or increased to achieve pick-up and release functions. In another embodiment, a motor-driven screw thread performs the pick-up and release functions, and assures that the picked-up probe will unambiguously be drawn into correct isostatic engagement with the three-point support.

REFERENCES:
patent: 4145802 (1979-03-01), d'Auria
patent: 4349946 (1982-09-01), McMurtry
patent: 4358888 (1982-11-01), Zankl et al.
patent: 4499650 (1985-02-01), Cannon et al.

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