Metal deforming – With use of control means energized in response to activator... – Sensing tool or tool-linked part
Patent
1988-10-14
1990-01-02
Jones, David
Metal deforming
With use of control means energized in response to activator...
Sensing tool or tool-linked part
83 72, 73 1J, B21D 5500
Patent
active
048904686
ABSTRACT:
Described is a method for measuring and correcting the plunger adjustment in high-speed stroke presses. The plungers are used for cutting, punching, bending and/or embossing semi-finished goods or the like with high tolerance requirements. The plunger must be readjusted in accordance with the number of strokes per minute and the plunging depth of the plunger is measured. This is carried out using a detector head being provided with a plurality of induction loops, which is guided with the plunger stroke along a permanent magnetic strip, whose longitudinal extension is subdivided into alternating North/South poles. The induced voltage development is scanned through cosine and sine functions of the induction coils for any predetermined travel unit, and the amplitudes of the two functions are measured and evaluated at the turnover point. That means that one of the amplitudes or the maximum neighboring amplitude as measured at the return point serves as reference voltage and other amplitude advances the measured value.
REFERENCES:
patent: 4408471 (1983-10-01), Gossard et al.
patent: 4802357 (1989-02-01), Jones
Frisch Helmuth
Hartinger Johann
Weber Alois
Blackman William D.
Jones David
S & S Electronike Geratebau Cmbit.
Weintraub Arnold S.
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