FEED RATE AND POSITIONING CONTROL SYSTEM FOR A MACHINE TOOL

A feed rate and positioning control system for a machine tool is described which utilizes an electro-hydraulic pulse motor to move a grinding wheel support at preselected rates and for predetermined distances during a grinding operation. A control counter is arranged, via rate selecting switches, to...

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Bibliographische Detailangaben
Hauptverfasser:	SCHOONOVER S,US, PRICE R,US
Format:	Patent
Sprache:	eng
Schlagworte:	COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOTDIRECTED TO A PARTICULAR RESULT CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g.ARRANGEMENTS FOR COPYING OR CONTROLLING DRESSING OR CONDITIONING OF ABRADING SURFACES FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS FUNCTIONAL ELEMENTS OF SUCH SYSTEMS GRINDING MACHINE TOOLS MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OFPARTICULAR DETAILS OR COMPONENTS MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING METAL-WORKING NOT OTHERWISE PROVIDED FOR MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PERFORMING OPERATIONS PHYSICS POLISHING REGULATING TRANSPORTING
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Beschreibung
Zusammenfassung:	A feed rate and positioning control system for a machine tool is described which utilizes an electro-hydraulic pulse motor to move a grinding wheel support at preselected rates and for predetermined distances during a grinding operation. A control counter is arranged, via rate selecting switches, to select pulses of various predetermined pulse repetition rates for controlling the rates at which the electro-hydraulic pulse motor moves during a grinding operation. End point selecting switches and comparators are provided for determining the distances moved by the support during a grinding operation to signal the control counter to change rates or to start a dwell period. Dwell selecting switches, responsive to the control counter, are provided to establish the duration of dwell periods between application of selected rates and to signal the control counter at the end of each dwell period, including a spark out period at the end of the grinding operation.