DE919055C - Safety circuit for electromotive drives of machine tools with magnetic clamping devices - Google Patents

Safety circuit for electromotive drives of machine tools with magnetic clamping devices

Info

Publication number
DE919055C
DE919055C DEH12048D DEH0012048D DE919055C DE 919055 C DE919055 C DE 919055C DE H12048 D DEH12048 D DE H12048D DE H0012048 D DEH0012048 D DE H0012048D DE 919055 C DE919055 C DE 919055C
Authority
DE
Germany
Prior art keywords
safety circuit
clamping devices
machine tools
magnetic
magnetic clamping
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
DEH12048D
Other languages
German (de)
Inventor
Reinhold Holze
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.)
REINHOLD HOLZE
Original Assignee
REINHOLD HOLZE
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by REINHOLD HOLZE filed Critical REINHOLD HOLZE
Priority to DEH12048D priority Critical patent/DE919055C/en
Application granted granted Critical
Publication of DE919055C publication Critical patent/DE919055C/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
    • 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
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)

Description

Werkzeugmaschinen zur Bearbeitung von Stahl und Eisen sind häufig mit Vorrichtungen ausgerüstet, welche die zu bearbeitenden Teile elektromagnetisch festhalten. Bei allen Vorzügen haben diese Magnetspannvorrichtungen den Nachteil, daß bei Unterbrechung des Erregerstromes die Werkstücke sich lösen und fortgeschleudert werden, wobei Maschine und Menschen. gefährdet werden. Diesein Übelstand hilft die nachstehene Erfindung ab.Machine tools for working steel and iron are common equipped with devices that electromagnetically control the parts to be machined hold tight. With all advantages, these magnetic clamping devices have the disadvantage that when the excitation current is interrupted, the workpieces loosen and are thrown away being, being machine and people. be endangered. This one evil helps the invention below.

Der Erfindungsgedanke soll an einem Beispiel erläutert werden, das in der Zeichnung das entsprechende schematische Schaltbild zeigt.The idea of the invention will be explained using an example that in the drawing shows the corresponding schematic circuit diagram.

A ist eine magnetische Spannplatte, die das Werkstück B hält. Dieses wird durch die Schleifscheibe C bearbeitet. Der Tisch mit der Spannplatte wird durch einen Hilfsmotor D über ein Getriebe E hin und her bewegt. Ben.`m Ausbleiben des Magnetstromes muß in diesem Falle in erster Linie die Bewegung des Tisches aufhören. Dies wird dadurch erreicht, daß ein Ruhestrommagnet F beim Stromlos-werden das Getriebe E ausrückt. Außerdem wird durch ein Ruhestromrelais G der Strom für den Hilfsmotor D unterbrochen. Man kann selbstverständlich auch den Schleifscheibenmotor H mit abschalten.A is a magnetic chuck that holds workpiece B. This is machined by the grinding wheel C. The table with the clamping plate is through an auxiliary motor D via a gear E moves back and forth. Ben. In the absence of the Magnetic current must in this case primarily stop the movement of the table. This is achieved in that a quiescent current magnet F when the gear is de-energized E disengages. In addition, the current for the auxiliary motor is supplied by a closed-circuit relay G D interrupted. You can of course also use the grinding wheel motor H. switch off.

Da das Abschalten der Tischbewegung immerhin eine gewisse Zeit beansprucht, wird erfindungsgemäß dem Magneten A ein Kondensator I parallel geschaltet, der nach Unterbrechung der Stromzufuhr den Magneten so lange speist, bis die Abschaltung der Tischbewegung mit Sicherheit erfolgt ist.Since switching off the table movement takes a certain amount of time, a capacitor I is connected in parallel to the magnet A according to the invention, which after Interruption of the power supply feeds the magnet until it is switched off the table movement is certain to have taken place.

Selbstverständlich ist die technischeAusführungsform des Erfindungsgedankens bei anderen Werkzeugmaschinen entsprechend zu ändern. So kann es z. B. zweckmäßig sein, den Motor bzw. die, Motoren nicht nur abzuschalten, sondern zu bremsen. Die hierzu notwendigen Maßnahmen sind bekannt. Die Schaltorgane F und G -im angeführten. Ausführungsbeispiel werden zweckmäßig so gestaltet, daß beim Einschalten des Magnetstromes noch keine Einschaltung der Vorschubbewegung bzw. des Hauptmotors erfolgt, damit die magnetische Spannvorrichtung bei stillstehender Maschine bestückt werden kann. Die Magneten F und G sind also beispielsweise Haltemagneten, deren Anker nicht von selbst anziehen, sondern erst durch die Einrückbewegung angelegt werden. Bei Unterbrechung des Magnetstromes fallen die Anker, wie oben erläutert, von selbst ab@It goes without saying that the technical embodiment of the idea of the invention is to change accordingly for other machine tools. So it can be B. expedient not only to switch off the motor or motors, but to brake them. the measures necessary for this are known. The switching elements F and G -im listed. Embodiment are expediently designed so that when switching on the magnetic current The feed movement or the main motor has not yet been switched on so that the magnetic clamping device can be loaded while the machine is at a standstill. The magnets F and G are, for example, holding magnets whose armature is not of tighten by yourself, but must only be put on by the engaging movement. In the event of an interruption of the magnet current, the armatures drop by themselves, as explained above @

Claims (5)

PATENTANSPRÜCHE: i. Sicherheitsschaltung für Maschinen mit magnetischen Aufspannvorrichtungen, dadurch gekennzeichnet, daß die Unterbrechung des Magneterregers die Stillsetzung derjenigen Ma,-schinenteile bewirkt, deren. Weiterbewegung aus Sicherheitsgründen verhindert werden muß. PATENT CLAIMS: i. Safety circuit for machines with magnetic Clamping devices, characterized in that the interruption of the magnetic exciter the shutdown of those machine parts caused. Moving on from Must be prevented for security reasons. 2. Sicherheitsschaltung für Maschinen nach Anspruch i, dadurch gekennzeichnet, daß die Vorschubbewegung der Aufspannvorrichtung beim Ausbleiben des Magnetstromes unterbrochen wird. 2. Safety circuit for machines according to claim i, characterized in that the feed movement of the clamping device is interrupted in the absence of the magnet current. 3. Sicherheitsschaltung für Maschinen nach Anspruch i und 2, dadurch gekennzeichnet, daß auch der Hauptmotor abgeschaltet wird. q.. 3. Safety circuit for Machines according to Claims 1 and 2, characterized in that the main motor is also is switched off. q .. Sicherheitsschaltung für Maschinen nach Anspruch i, dadurch gekennzeichnet, daß der oder die- Antriebsmoto,ren abgebremst werden. Safety circuit for machines according to Claim i, characterized characterized in that the or the drive motors are braked. 5. Sicherheitsschaltung für Maschinen nach Anspruch i bis q., dadurch gekennzeichnet, daß de magnetischen Aufspannvorrichtung ein Kondensator parallel geschaltet ist.5. Safety circuit for machines according to claims i to q., characterized in that the magnetic Jig a capacitor is connected in parallel.
DEH12048D 1942-03-05 1942-03-05 Safety circuit for electromotive drives of machine tools with magnetic clamping devices Expired DE919055C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEH12048D DE919055C (en) 1942-03-05 1942-03-05 Safety circuit for electromotive drives of machine tools with magnetic clamping devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH12048D DE919055C (en) 1942-03-05 1942-03-05 Safety circuit for electromotive drives of machine tools with magnetic clamping devices

Publications (1)

Publication Number Publication Date
DE919055C true DE919055C (en) 1954-10-11

Family

ID=7146881

Family Applications (1)

Application Number Title Priority Date Filing Date
DEH12048D Expired DE919055C (en) 1942-03-05 1942-03-05 Safety circuit for electromotive drives of machine tools with magnetic clamping devices

Country Status (1)

Country Link
DE (1) DE919055C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975140C (en) * 1953-06-18 1961-08-31 Beteiligungs & Patentverw Gmbh Safety device for machine tools
US6529360B2 (en) 1998-04-27 2003-03-04 Phoenix Contact Gmbh & Co. Overvoltage protection element system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975140C (en) * 1953-06-18 1961-08-31 Beteiligungs & Patentverw Gmbh Safety device for machine tools
US6529360B2 (en) 1998-04-27 2003-03-04 Phoenix Contact Gmbh & Co. Overvoltage protection element system

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