Apparatus for measuring the travel speed of automatic welding ma

Details Apparatus for measuring the travel speed of automatic welding ma Apparatus for measuring the travel speed of automatic welding ma

1981-06-10

1984-01-17

Shaw, C. C.

Electric heating

Metal heating

By arc

21912434, 324175, B23K 910

Patent

active

044265654

ABSTRACT:
A method and apparatus for controlling the travel speed of automatic welding machines uses a rotatable member which is engaged with the workpiece as the workpiece is moved relative to the welding head. The rotatable member advantageously includes one or more apertures on one side of which light is directed and the opposite side of which light pulses are received during rotation of the member and these pulses are used as an indication of the speed of the welding machine. In the preferred apparatus a separate frictional member is frictionally engaged with the workpiece and moved by the movement of the workpiece relative to the welding head and through suitable gearing drives the rotatable member having the aperture. Light is transmitted to one side of the rotatable member preferably from a light source through optical fibers and is picked up on the opposite side by similar optical fiber elements which transmit the pulse signals to a sensor for the purpose of giving a digital or other reading in respect to the speed involved.

REFERENCES:
patent: 2719899 (1955-10-01), Schwarting
patent: 3509314 (1970-04-01), Freytag
patent: 3626146 (1971-12-01), Smith
patent: 3675199 (1972-07-01), Jamison et al.
patent: 3780297 (1973-12-01), Geary
patent: 3814934 (1974-06-01), Mesh et al.
patent: 4227150 (1980-10-01), Widl

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