Electric heating – Metal heating – Of cylinders
Patent
1977-09-15
1979-08-07
Albritton, C. L.
Electric heating
Metal heating
Of cylinders
21912511, 228 9, B23K 912
Patent
active
041638867
ABSTRACT:
Disclosed is a control apparatus for an automatic pipe welder, for controlling the automatic pipe welder which continuously butt welds pipes while it is running along a welding line on the periphery of a pipe, in accordance with predetermined welding conditions for each of a plurality of welding areas sectioned along the welding line. All of the welding conditions for the welding areas are stored in a digital storage device while welding conditions on an area currently being welded are stored in another storage device. The contents of the second-mentioned digital storage device are converted by a digital-analog converter to analog signals, which are then held respectively in corresponding sample and hold circuits. Outputs of the sample and hold circuits are supplied as control commands to respective control units which control the welder in accordance with the welding conditions. In this manner, the construction of the control apparatus and a control panel thereof is simplified.
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A. J. Weissberger, "Microprocessors Simplify Industrial Control", Electronic Design 22, 10/25/75, pp. 96-99.
Omae Tsutomu
Sakai Keiziro
Albritton C. L.
Hitachi , Ltd.
Shaw Clifford C.
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