Method and apparatus for controlling with increased accuracy a p

Details Method and apparatus for controlling with increased accuracy a p Method and apparatus for controlling with increased accuracy a p

1974-04-30

1976-03-16

Mehr, Milton S.

Metal deforming

By pulling workpiece through closed periphery die

Utilizing specified work moving means

226164, B21C 114

Patent

active

039437434

ABSTRACT:
Method of controlling with heightened accuracy a processing machine driven t different operating speeds and having a machine part moving through a predetermined full range, the processing machine, at an initial setting of the moving machine part, within a given tolerance range, repeatedly permitting start-up of a processing cycle that has been instituted in advance through a precontrolled time period dependent upon the operating speed and which includes a control commencement build-up time period and a full range displacement time period, which includes interposing a blocking time period between the control commencement build-up time period and the full range displacement time period, the blocking time period always ending at the same position in the displacement range of the moving machine part, blocking the full range displacement by the moving machine part until the end of the blocking time period, and advancing the start of the control commencement build-up time period in accordance with the blocking time period; apparatus for performing the foregoing method; a processing machine in the form of a slide drawing machine per se; and auxiliary devices for the slide drawing machine.

REFERENCES:
patent: 1683906 (1928-09-01), Mahoney
patent: 2803456 (1957-08-01), Powers
patent: 3844152 (1974-10-01), Peytavin

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