Multi-pressure control system

Details Multi-pressure control system Multi-pressure control system

1990-08-22

1991-07-16

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

219 912, B23K 1100

Patent

active

050327046

ABSTRACT:
A multi-purpose control system for a backup type welding gun and similar apparatuses including a positioning directional control valve for controlling the extension and retraction of the positioning or backup cylinder. A multi-pressure air sequence circuit and a time delay means operatively connected to the air sequence circuit for controlling the admission of a predetermined low pressure into the retract port of a backup type welding gun positioning cylinder to speed up the extension movement of the position piston carrying a weld cylinder, and then to control the admission of a predetermined higher retraction pressure higher retraction into said retract port, after a predetermined time delay interval. A welding pressure four-way directional control valve operatively connects a multi-pressure selector air circuit to the weld cylinder operating port to provide a plurality of pre-set pressures to the weld cylinder operating port for carrying out welding operations at selective pressures and in selected sequences.

REFERENCES:
patent: 4135076 (1979-01-01), Beneteau
patent: 4579042 (1986-04-01), Neff et al.

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