Control system for synchronising machine tool motors for tapping operations

The control system synchronizes a spindle motor 12, which rotates a tap 3 for a tapping operation, with a Z-axis feed motor 26 which transports a table 1 mounting a workpiece 2 longitudinally of the tap 3. The spindle motor 12 and the Z-axis feed motor are driven at all times such that Ns - fm/P, wh...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	FUJIOKA, YOSHIKI, KOHZAI, YOSHINORI
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOTDIRECTED TO A PARTICULAR RESULT CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g.ARRANGEMENTS FOR COPYING OR CONTROLLING ELECTRICITY FUNCTIONAL ELEMENTS OF SUCH SYSTEMS GENERATION MACHINE TOOLS MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OFPARTICULAR DETAILS OR COMPONENTS METAL-WORKING NOT OTHERWISE PROVIDED FOR MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PERFORMING OPERATIONS PHYSICS REGULATING SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES THREAD CUTTING TRANSPORTING WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTIONTHEREWITH
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	The control system synchronizes a spindle motor 12, which rotates a tap 3 for a tapping operation, with a Z-axis feed motor 26 which transports a table 1 mounting a workpiece 2 longitudinally of the tap 3. The spindle motor 12 and the Z-axis feed motor are driven at all times such that Ns - fm/P, where Ns (rpm) is the rotational speed of the tap 3 driven by the spindle motor, fm is the feed speed of the table 1 along the Z-axis, and P is the thread pitch of the tap 3. The Z-axis feed motor 26 is driven at a speed fm derived in dependence upon an output of an erithmetic circuit 23 which computes the product Ns.P, from a thread pitch P signal supplied from a numerical control unit 22 and a spindle speed signal Ns supplied from a tachogenerator 13 coupled to spindle mechanism 15.