DE656481C - Electromotive direct current drive for machine tools - Google Patents

Electromotive direct current drive for machine tools

Info

Publication number
DE656481C
DE656481C DER94113D DER0094113D DE656481C DE 656481 C DE656481 C DE 656481C DE R94113 D DER94113 D DE R94113D DE R0094113 D DER0094113 D DE R0094113D DE 656481 C DE656481 C DE 656481C
Authority
DE
Germany
Prior art keywords
direct current
current drive
machine tools
motor
electromotive direct
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DER94113D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FRITZ RASKOP
Original Assignee
FRITZ RASKOP
Publication date
Priority to DER94113D priority Critical patent/DE656481C/en
Application granted granted Critical
Publication of DE656481C publication Critical patent/DE656481C/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Description

Bei gleichbleibender Drehzahl eines rotierenden, zylindrischen Körpers oder einer Planfläche nimmt die Schnittgeschwindigkeit beim Spanabheben mit der Verkleinerung des S Drehdurchmessers ab. Dieser Nachteil - verhindert die bestmöglichste Ausnutzung der Schnittwerkzeuge und bedingt unnötig hohen Zeitaufwand. Man hat daher versucht, 'die Drehzahl des Arbeitsstückes entsprechend der Abnahme des Drehdurchmessers zu erhöhen und die Schnittgeschwindigkeit konstant zu halten.With a constant speed of a rotating, cylindrical body or a The cutting speed during chip removal decreases with the reduction of the flat surface S turning diameter. This disadvantage - prevents the best possible exploitation of the Cutting tools and unnecessarily high expenditure of time. One has therefore tried to 'die Increase the speed of the workpiece according to the decrease in the turning diameter and to keep the cutting speed constant.

Beim Antrieb durch Gleichstrommotoren kann die Drehzahl des Motors durch Schwär chung des Nebenschlußfeldes in gewissen Grenzen geregelt werden, indem- man einen Widerstand in den Nebenschlußstramkreis schaltet. Bei bekannten Antrieben von Werkzeugmaschinen hat man diesen Widerstand mit dem Vorschub des Drehwerkzeuges gekuppelt und hierdurch eine zwangsläxifige Regelung der Schnittgeschwindigkeit erhalten. Da diese Regler aber nur verhältnismäßig grobstufig arbeiten, so ist eine stufenlose Regelung der Drehzahl des Antriebsmo.tors nicht möglich. Bei großen Motorleistungen sind überdies die Ausmaße solcher Regler so erheblich, daß der Raumbedarf und die Anschaffungskosten eine Anwendung dieses Regelpiinzipes erschweren oder unmöglich machen.When driven by DC motors, the speed of the motor can vary by Schwär ching of the shunt field can be regulated within certain limits by one Resistance switches into the shunt circuit. In known machine tool drives this resistance has been coupled with the advance of the turning tool and thereby an inevitable Control of the cutting speed obtained. Since this regulator is only proportionate If you work in coarse steps, then there is a stepless regulation of the speed of the drive motor not possible. In the case of large engine powers, the dimensions of such regulators are also important so significant that the space requirements and the cost of purchase make an application of this Make rule pin rules difficult or impossible.

Diese Nachteile werden erfindungsgemäß dadurch vermieden, daß dem Feld des Gleichstrommotors eine Hilfsdynamo entgegengeschaltet ist, die durch einen mit dem Support unmittelbar gekuppelten Regler gesteuert wird.These disadvantages become according to the invention avoided by connecting an auxiliary dynamo to the field of the direct current motor which is controlled by a controller directly coupled to the support.

In der Abbildung ist der Antrieb der Werkzeugmaschine in der Schaltung nach der Erfindung dargestellt.In the figure, the drive of the machine tool is in the circuit according to the invention shown.

α ist der Gleichstrommotor, b die Hilfsdynamo und c der Feldwiderstand der Hilfsdynamo, der unmittelbar mit dem Vorschub des Spanabhebewerkzeuges gekuppelt ist. Die von der Hilfsdynamo erzeugte Gegenspannung wird also unmittelbar von dem Vorschub des Werkzeuges bestimmt, das mit dem Support gekuppelt ist. α is the DC motor, b the auxiliary dynamo and c the field resistance of the auxiliary dynamo, which is directly coupled to the feed of the chip removal tool. The counter-voltage generated by the auxiliary dynamo is thus determined directly by the feed rate of the tool that is coupled to the support.

Durch die Schaltung nach der Erfindung werden folgende Vorteile erzielt:The circuit according to the invention provides the following advantages:

Das Regelorgan der Hilfsdynamo ist in seinen Abmessungen so klein, daß es bequem an dem Support eines Spanabhebewerkzeuges angeordnet und ohne Zwischenglied durch den Vorschub des Supports betätigt werden kann.The dimensions of the control element of the auxiliary dynamo are so small that it is convenient arranged on the support of a chip removal tool and operated without an intermediate link by the advance of the support can be.

Der Regelwiderstand kann daher als Schiebewiderstand ausgeführt und hierdurch eine praktisch /stufenlose Drehzahlregelung des Antriebsmotors mit einfachen, billigen und genau arbeitenden Hilfsmitteln erreicht werden.The rheostat can therefore be designed as a slide resistor and thereby a practical / stepless speed control of the drive motor with simple, cheap and precisely working aids can be achieved.

Durch Anordnung einer zweiten Kontaktbahn an dem Regiere kann derselbe Regler auch für Handbetrieb eingerichtet werden, indem die Stromabnahme der vom Support gesteuerten Kontaktbahn durch einen Schalter unterbrochen und dann der Kontaktschieber der von Hand geregelten Kontaktbahn nach Bedarf verstellt wird. By arranging a second contact track on the controller, the same controller can can also be set up for manual operation by taking the power from the support controlled contact path interrupted by a switch and then the contact slide the manually controlled contact path is adjusted as required.

Claims (1)

Patentanspruch:Claim: Elektromotorischer Gleichstromantrieb für Werkzeugmaschinen, bei denen zur selbständigen Konstanthaltung der Schnittgeschwindigkeit von Spanabhebewerkzeugen bei veränderlichem Durchmesser des zu bearbeitenden Werkstückes der Gleichstrommotor durch einen mit dem Vorschub des Werkzeuges gekuppelten Regelwiderstand beeinflußt wird, dadurch gekennzeichnet, daß dem Feld des Gleichstrommotors eine Hilfsdynamo entgegengeschaltet ist, die durch einen mit dem Support unmittelbar gekuppelten Regler gesteuert wird.Electromotive direct current drive for machine tools, where for Independent maintenance of the cutting speed of chip removal tools with a variable diameter of the workpiece to be machined, the DC motor is coupled to the feed of the tool Variable resistor is influenced, characterized in that the field of the DC motor an auxiliary dynamo is connected in the opposite direction, which is controlled by a controller directly coupled to the support is controlled. Hierzu 1 Blatt Zeichnungen1 sheet of drawings
DER94113D Electromotive direct current drive for machine tools Expired DE656481C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER94113D DE656481C (en) Electromotive direct current drive for machine tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER94113D DE656481C (en) Electromotive direct current drive for machine tools

Publications (1)

Publication Number Publication Date
DE656481C true DE656481C (en) 1938-02-07

Family

ID=7419093

Family Applications (1)

Application Number Title Priority Date Filing Date
DER94113D Expired DE656481C (en) Electromotive direct current drive for machine tools

Country Status (1)

Country Link
DE (1) DE656481C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE760342C (en) * 1940-08-23 1954-03-08 Aeg Device for keeping the cutting speed constant when changing the workpiece diameter, especially with turning jaws
DE976103C (en) * 1952-04-29 1963-02-28 Reimers Getriebe K G Device for setting and keeping the peripheral speed measured at the point of the changing working diameter on machines with rotating working movement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE760342C (en) * 1940-08-23 1954-03-08 Aeg Device for keeping the cutting speed constant when changing the workpiece diameter, especially with turning jaws
DE976103C (en) * 1952-04-29 1963-02-28 Reimers Getriebe K G Device for setting and keeping the peripheral speed measured at the point of the changing working diameter on machines with rotating working movement

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