Control circuitry for producing variably rifled tubes

Details Control circuitry for producing variably rifled tubes Control circuitry for producing variably rifled tubes

1981-01-26

1983-04-26

Shaw, C. C.

Electric heating

Metal heating

Of cylinders

219 7614, 21912511, B23K 904

Patent

active

043814409

ABSTRACT:
An electrical circuit (102, 102') employable in cooperative association with welding means (90) for purposes of effecting the application of a weld deposited rib on the inner wall surface of a boiler tube (10), and through the use of which control is exercised over the size, pitch and pattern of the rib. For purposes of exercising control over the rib size and the rib pitch, the subject electrical circuit (102, 102') includes first (104, 104'), second (106) and third (108) electronic speed controller means that are connected in electrical circuit relation to the rotational motor means (92) of the welding means (90), the linear travel motor means (94) of the welding means (90), and the wire feed motor means (96) of the welding means (90), respectively. Further, the subject electrical circuit (102, 102') includes a dual purpose electronic speed controller means (148) that is connected in electrical circuit relation with each of the first (104, 104'), second (106) and third (108) electronic speed controller means so as to be operative to exercise control over each of the latter by means of a common speed adjusting switch (150) that the former has associated therewith. For purposes of exercising control over the nature of the rib pattern, the first electronic speed controller means (104') and the rotational motor means (94') of the welding means (90) are each of the servo type so that there may occur the rapid reversing thereof, which is required in the course of the formation of the types of rib pattern that are desired to be applied to the boiler tube (10) inner wall surface.

REFERENCES:
patent: 2912562 (1959-11-01), Donovan
patent: 2927195 (1960-03-01), Arnaud
patent: 3272961 (1966-09-01), Maier, Jr. et al.
patent: 3627973 (1971-12-01), Smith
patent: 4215809 (1980-08-01), Davis

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