EP2147755B1 - Drilling machine, in particular core hole drilling machine, and method for controlling such - Google Patents

Drilling machine, in particular core hole drilling machine, and method for controlling such Download PDF

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Publication number
EP2147755B1
EP2147755B1 EP09009078A EP09009078A EP2147755B1 EP 2147755 B1 EP2147755 B1 EP 2147755B1 EP 09009078 A EP09009078 A EP 09009078A EP 09009078 A EP09009078 A EP 09009078A EP 2147755 B1 EP2147755 B1 EP 2147755B1
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EP
European Patent Office
Prior art keywords
electric motor
electromagnet
drilling machine
switching
switched
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Active
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EP09009078A
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German (de)
French (fr)
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EP2147755A3 (en
EP2147755A2 (en
Inventor
Martin Beichter
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C&E Fein GmbH and Co
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C&E Fein GmbH and Co
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Priority to PL09009078T priority Critical patent/PL2147755T3/en
Publication of EP2147755A2 publication Critical patent/EP2147755A2/en
Publication of EP2147755A3 publication Critical patent/EP2147755A3/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
    • B25H1/0021—Stands, supports or guiding devices for positioning portable tools or for securing them to the work
    • B25H1/0057—Devices for securing hand tools to the work
    • B25H1/0064—Stands attached to the workpiece
    • B25H1/0071—Stands attached to the workpiece by magnetic means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/16—Cutting by use of rotating axially moving tool with control means energized in response to activator stimulated by condition sensor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/16—Cutting by use of rotating axially moving tool with control means energized in response to activator stimulated by condition sensor
    • Y10T408/165—Cutting by use of rotating axially moving tool with control means energized in response to activator stimulated by condition sensor to control Tool rotation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/21—Cutting by use of rotating axially moving tool with signal, indicator, illuminator or optical means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/44—Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/55—Cutting by use of rotating axially moving tool with work-engaging structure other than Tool or tool-support
    • Y10T408/554—Magnetic or suction means

Definitions

  • the invention relates to a drill, in particular a Kemlochbohrmaschine, with an electromagnet for attachment to a metal part, with an electric motor for driving a tool, and with a switching device which comprises at least one switch for switching on and off of an electric motor and the electromagnet, such is formed, that when the electric motor is switched off the electromagnet is only possible if previously made a switch off the electric motor.
  • the invention further relates to a method for controlling such a drilling machine.
  • a drilling machine and a method according to the aforementioned type are known from US 4,278,371 A. known.
  • the disadvantage here is that a safe on state of the electromagnet is not guaranteed in an electric motor in all necessary cases.
  • Such core drilling machines which are attached by means of an electromagnet on the ferromagnetic part, which is usually also the workpiece, are subject to a variety of conditions of use. This is often worked overhead or on Stahlträgem at very high altitude. Very high occupational safety is therefore of great importance for the prevention of accidents.
  • Kemlochbohrmaschine similar kind is from the EP 1 621 286 A2 known.
  • a stand is provided on which an electromagnet is provided for attachment to a ferromagnetic metal part on which a drilling unit is movably received, wherein the drilling unit has a housing in which an electric motor for driving a tool is accommodated, and wherein a switching device, the at least one switch for switching on and off of an electric motor and the electromagnet, is provided.
  • the controls are in this case provided on the side of the stand or of the housing of the drilling unit. Especially when working overhead or in a similar limited The operator has only a very limited overview of the individual functions.
  • the present invention seeks to provide an improved drill, in particular Kemlochbohrmaschine achieved by the increased safety against the known in the art core drilling.
  • a speed sensor is provided which is coupled to the switching device such that a switching off of the electromagnet is only possible if the electric motor has a speed that is less than or equal to one predetermined limit speed is.
  • Threshold speed may be about 150 revolutions / minute, more preferably 100 RPM, further 50 RPM or 10 RPM.
  • the switching device is further designed such that when switching on the drill first the solenoid is turned on and only when a further actuation of the switching device of the electric motor is turned on.
  • the switching device has a common, preferably via a button actuated switch, via which the switching on and off of the electromagnet and the elimination of the electric motor is controlled.
  • At least one further switch is provided for switching on and off of the electric motor, which only allows the electric motor to be switched on when the electromagnet is switched on.
  • To switch off the electric motor can also be used the other switch or provided for the actuation of the electromagnet switch. If this is actuated, the electric motor is first switched off. Preferably, only with a time delay or when the rotational speed of the electric motor falls below a predetermined limit value is then an elimination of the electromagnet.
  • the drilling machine has a stator on which the electromagnet is provided for attachment to a metal part, on which a drilling unit is movably received, wherein the drilling unit has a housing in which the electric motor is received for driving a tool, and wherein the switching device has an operating and control panel, which is accommodated on an end of the housing facing away from the tool.
  • This measure has the advantage that the control panel is constantly observed during the drilling process. Thus, all necessary control and monitoring functions can be better monitored during the work process, resulting in improved safety at work.
  • the drill on a control and control panel which has a plurality of switching elements preferably in the form of buttons, preferably a switching element for switching on the electric motor in reverse, a switching element for switching on the electric motor in the clockwise direction, a switching element for a - And off a cooling lubricant supply, a switching element for switching on an electronic speed reduction, and a switching element for switching off the electric motor.
  • a switching element for switching on the electric motor in reverse preferably a switching element for switching on the electric motor in reverse, a switching element for switching on the electric motor in the clockwise direction, a switching element for a - And off a cooling lubricant supply, a switching element for switching on an electronic speed reduction, and a switching element for switching off the electric motor.
  • At least one of the switching elements are formed as part of a dust-proof membrane keyboard or a silicone switching mat.
  • a magnetic force sensor for monitoring the magnetic holding force is provided, which is coupled to an optical and / or acoustic display.
  • the magnetic force sensor may also be coupled to the switching device, in order then, when a predetermined limit value is exceeded, to avoid starting of the electric motor.
  • Fig. 1 is a drill according to the invention, which is designed as Kernlochbohrmaschine, generally designated by the numeral 10.
  • the drilling machine 10 has a stand 12, which can be fastened by means of an electromagnet 14 on a ferromagnetic metal part 28.
  • a guide 30 is provided, on which a drilling unit 16 is movably received by means of a carriage 32.
  • the drilling unit 16 has a housing 18, in which an electric motor 20 is accommodated, which is designed to drive a drill spindle 22. At the outer end of the drill spindle 22, a drilling tool 26 by means of a receptacle 24 is releasable attached.
  • a controller 19 is further provided, which is preferably designed as a microprocessor control.
  • the controller 19 comprises a switching device to which a magnetic switch 34 received on the side of the stator 12 belongs, which is designed to switch on and off the electromagnet 14 and the electric motor 20, as will be explained below.
  • the switching device further comprises an operating and control panel 38, which is received on the tool 26 opposite end 36 of the housing 18 and its structure Fig. 2 can be seen in more detail.
  • a feed unit 33 is provided, which can either be operated automatically or by manual operation on one of the levers.
  • the control and control panel 38 has a total of five switching elements in the form of buttons 40, 42, 44, 46, 48, which are designed as large-area touch panels in a membrane keypad 50 or a silicone keypad.
  • the switching element 40 is designed to switch on the electric motor 20 in reverse.
  • the switching element 42 is designed to switch on the electric motor 20 in the clockwise direction.
  • the switching element 44 is designed for switching on and off the cooling lubricant supply.
  • the switching element 46 is designed to activate an electronic speed reduction.
  • the remote from the other four switching elements switching element 48 is designed to turn off the electric motor 20.
  • a speed sensor 21 is further provided, which is designed to monitor the engine speed, for example, to allow a shutdown of the solenoid only when the speed is, for example, less than 10 U / min or about equal to zero.
  • a sensor 37 for detecting the magnetic holding force which is coupled to a display 52 (e.g., LED) for the magnetic holding force on the switching element 42. If the magnetic holding force falls below a certain threshold value (which depends on the drilling diameter), in addition the switch 34 and / or the switching elements 40, 42 can flash.
  • the magnetic switch 34 which is provided on the side of the stator 12, is now coupled to the controller 19 or the switching device in such a way that the electric motor 20 first has to be switched off to switch off the electromagnet 14.
  • an actuation of the key of the magnetic switch 34 causes the electric motor 20 to be switched off.
  • the electromagnet 14 can then be switched off automatically with a sufficient time delay or only when the speed detected by the rotational speed sensor 21 falls below a certain threshold value of e.g. 10 rpm has dropped or is zero.
  • the further functions of the core drilling machine can be controlled via the operating and control panel 38 which is provided on the outer end 36 of the housing 18 on the side facing away from the tool 26.
  • a switching element of the control and control panel 38 must be actuated with activated electromagnet 14.
  • the coolant supply can be switched on or off.
  • the switching element 46 an electronic speed reduction can be activated.
  • the switching element 48 serves to switch off the electric motor 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

The boring machine has an electromagnet (14) for attachment to a metal part (28). An electric motor (20) is provided for driving a tool (36), where a control unit comprises a switch (34) for switching on and off the electric motor and the electromagnet. A speed sensor (21) is coupled to the control unit, such that the electromagnet is switched off when the electric motor has a speed less than or equal to a limiting speed. An independent claim is included for a method for controlling a boring machine.

Description

Die Erfindung betrifft eine Bohrmaschine, insbesondere eine Kemlochbohrmaschine, mit einem Elektromagneten zur Befestigung an einem Metallteil, mit einem Elektromotor zum Antrieb eines Werkzeugs, und mit einer Schalteinrichtung, die mindestens einen Schalter zum Ein- und Ausschalten eines Elektromotors und des Elektromagneten umfasst, der derart ausgebildet ist, dass bei eingeschaltetem Elektromotor ein Ausschalten des Elektromagneten nur dann ermöglicht ist, wenn zuvor eine Ausschaltung des Elektromotors erfolgt. Die Erfindung betrifft ferner ein Verfahren zum Steuern einer derartigen Bohrmaschine.The invention relates to a drill, in particular a Kemlochbohrmaschine, with an electromagnet for attachment to a metal part, with an electric motor for driving a tool, and with a switching device which comprises at least one switch for switching on and off of an electric motor and the electromagnet, such is formed, that when the electric motor is switched off the electromagnet is only possible if previously made a switch off the electric motor. The invention further relates to a method for controlling such a drilling machine.

Eine Bohrmaschine und ein Verfahren gemäß der vorstehend genannten Art sind aus der US 4 278 371 A bekannt.A drilling machine and a method according to the aforementioned type are known from US 4,278,371 A. known.

Nachteilig ist hierbei, dass ein sicherer Einschaltzustand des Elektromagneten bei einem Elektromotor nicht in allen notwendigen Fällen gewährleistet ist.The disadvantage here is that a safe on state of the electromagnet is not guaranteed in an electric motor in all necessary cases.

Bei einer weiteren aus der EP 1 103 350 A2 bekannten Bohrmaschine wird der Einschaltzustand eines Elektromotors zum Antrieb eines Werkzeugs und eines Elektromagneten, der zur Befestigung an einem ferromagnetischen Werkstück dient, überwacht. Der Strom des Elektromagneten wird in einem Haltezustand, in dem lediglich der Elektromagnet, nicht jedoch der Elektromotor aktiviert ist, reduziert, da eine volle Haltekraft erst während des Bohrbetriebs im Arbeitszustand notwendig ist.In another from the EP 1 103 350 A2 known drilling machine, the on state of an electric motor for driving a tool and an electromagnet, which serves for attachment to a ferromagnetic workpiece monitored. The current of the electromagnet is reduced in a holding state in which only the electromagnet, but not the electric motor is activated, since a full holding force is necessary only during the drilling operation in the working state.

Derartige Kernlochbohrmaschinen, die mit Hilfe eines Elektromagneten am ferromagnetischen Teil befestigt werden, bei dem es sich in der Regel auch um das Werkstück handelt, unterliegen einer Vielzahl von Einsatzbedingungen. Hierbei wird häufig über Kopf gearbeitet oder auch an Stahlträgem in sehr großer Höhe. Eine sehr große Arbeitssicherheit ist daher zur Vermeidung von Unfällen von hoher Bedeutung.Such core drilling machines, which are attached by means of an electromagnet on the ferromagnetic part, which is usually also the workpiece, are subject to a variety of conditions of use. This is often worked overhead or on Stahlträgem at very high altitude. Very high occupational safety is therefore of great importance for the prevention of accidents.

Es hat sich im Betrieb gezeigt, dass immer wieder Fehlbedienungen vorkommen, da der Elektromagnet manchmal bei noch laufendem Elektromotor ausgeschaltet wird, so dass die Haltekraft nicht mehr ausreicht und die relativ schwere Bohrmaschine nur noch mit der Hand gehalten werden kann, so dass eine erhöhte Unfallgefahr besteht.It has been shown in operation that malfunction occurs again and again, since the electromagnet is sometimes turned off while the electric motor is still running, so that the holding force is no longer sufficient and the relatively heavy drill can only be held by hand, so that an increased risk of accidents consists.

Eine weitere Kemlochbohrmaschine ähnlicher Art ist aus der EP 1 621 286 A2 bekannt.Another Kemlochbohrmaschine similar kind is from the EP 1 621 286 A2 known.

Hierbei ist ein Ständer vorgesehen, an dem ein Elektromagnet zur Befestigung an einem ferromagnetischen Metallteil vorgesehen ist, an dem eine Bohreinheit verfahrbar aufgenommen ist, wobei die Bohreinheit ein Gehäuse aufweist, in dem ein Elektromotor zum Antrieb eines Werkzeugs aufgenommen ist, und wobei eine Schalteinrichtung, die mindestens einen Schalter zum Ein- und Ausschalten eines Elektromotors und des Elektromagneten umfasst, vorgesehen ist.In this case, a stand is provided on which an electromagnet is provided for attachment to a ferromagnetic metal part on which a drilling unit is movably received, wherein the drilling unit has a housing in which an electric motor for driving a tool is accommodated, and wherein a switching device, the at least one switch for switching on and off of an electric motor and the electromagnet, is provided.

Die Bedienelemente sind hierbei an der Seite des Ständers bzw. des Gehäuses der Bohreinheit vorgesehen. Insbesondere bei Arbeiten über Kopf oder in ähnlich eingeschränkter Weise hat der Bediener nur eine sehr eingeschränkte Übersicht über die einzelnen Funktionen.The controls are in this case provided on the side of the stand or of the housing of the drilling unit. Especially when working overhead or in a similar limited The operator has only a very limited overview of the individual functions.

Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, eine verbesserte Bohrmaschine, insbesondere Kemlochbohrmaschine zu schaffen, durch die eine erhöhte Arbeitssicherheit gegenüber den im Stand der Technik bekannten Kernlochbohrmaschinen erreicht wird.Against this background, the present invention seeks to provide an improved drill, in particular Kemlochbohrmaschine achieved by the increased safety against the known in the art core drilling.

Ferner soll ein geeignetes Verfahren zum Steuern einer Bohrmaschine, insbesondere Kemlochbohrmaschine, angegeben werden.Furthermore, a suitable method for controlling a drilling machine, in particular Kemlochbohrmaschine to be specified.

Diese Aufgabe wird bei einer Bohrmaschine gemäß der eingangs genannten Art dadurch gelöst, dass ein Drehzahlsensor vorgesehen ist, der mit der Schalteinrichtung derart gekoppelt ist, dass eine Ausschaltung des Elektromagneten nur dann ermöglicht ist, wenn der Elektromotor eine Drehzahl aufweist, die kleiner oder gleich einer vorgegebenen Grenzdrehzahl ist.This object is achieved in a drill according to the type mentioned above in that a speed sensor is provided which is coupled to the switching device such that a switching off of the electromagnet is only possible if the electric motor has a speed that is less than or equal to one predetermined limit speed is.

Hinsichtlich des Verfahrens wird die Aufgabe durch ein Verfahren zum Steuern einer Bohrmaschine, vorzugsweise einer Kernlochbohrmaschine, mit den folgenden Schritten gelöst:

  • Überwachen des Einschaltzustandes eines Elektromagneten zur Halterung der Bohrmaschine an einem Metallteil,
  • Überwachen der Aktivierung eines Elektromotors zum Antrieb eines Werkzeugs,
  • Steuern des Elektromotors und des Elektromagneten derart, dass bei eingeschaltetem Elektromotor zunächst der Elektromotor ausgeschaltet werden muss und erst bei ausgeschaltetem Elektromotor der Elektromagnet abgeschaltet werden kann,
  • wobei die Drehzahl des Elektromotors überwacht wird und eine Ausschaltung des Elektromagneten nur dann ermöglicht wird, wenn der Elektromotor eine Drehzahl aufweist, die kleiner oder gleich einer vorgegebenen Grenzdrehzahl ist.
With regard to the method, the object is achieved by a method for controlling a drilling machine, preferably a core hole drilling machine, with the following steps:
  • Monitoring the switch-on state of an electromagnet for holding the drill on a metal part,
  • Monitoring activation of an electric motor to drive a tool,
  • Controlling the electric motor and the electromagnet such that, when the electric motor is switched on, the electric motor must first be switched off and the electromagnet can only be switched off when the electric motor is switched off,
  • wherein the rotational speed of the electric motor is monitored and an elimination of the electromagnet is only possible when the electric motor has a speed which is less than or equal to a predetermined limit speed.

Die Aufgabe der Erfindung wird auf diese Weise vollkommen gelöst.The object of the invention is completely solved in this way.

Erfindungsgemäß ist nämlich eine weiter erhöhte Sicherheit gegen Fehlbedienungen gewährleistet, da eine Abschaltung des Elektromagneten erst dann ermöglicht ist, wenn der Elektromotor nicht nur abgeschaltet ist, sondern ferner auch in seiner Drehzahl soweit abgefallen ist, dass eine Gefahr nicht mehr zu befürchten ist.Bei der Grenzdrehzahl kann es sich etwa um 150 Umdrehungen/Minute, insbesondere 100 U/min, weiter um 50 U/min oder um 10 U/min handeln.According to the invention, a further increased security against incorrect operation is ensured, since a shutdown of the electromagnet is only possible when the electric motor is not only switched off, but also in its speed has dropped so far that a danger is no longer to be feared Threshold speed may be about 150 revolutions / minute, more preferably 100 RPM, further 50 RPM or 10 RPM.

In vorteilhafter Weiterbildung der Erfindung ist die Schalteinrichtung ferner derart ausgebildet, dass beim Einschalten der Bohrmaschine zunächst der Elektromagnet eingeschaltet wird und erst bei einer weiteren Betätigung der Schalteinrichtung der Elektromotor eingeschaltet wird.In an advantageous embodiment of the invention, the switching device is further designed such that when switching on the drill first the solenoid is turned on and only when a further actuation of the switching device of the electric motor is turned on.

Hierdurch ist gewährleistet, dass ein Antrieb des Elektromotors nur dann ermöglicht ist, wenn die Bohrmaschine zuvor mittels des Elektromagneten an dem betreffenden Metallteil fixiert wurde.This ensures that a drive of the electric motor is only possible if the drill has previously been fixed by means of the electromagnet to the relevant metal part.

Gemäß einer weiteren Ausgestaltung der Erfindung weist die Schalteinrichtung einen gemeinsamen, vorzugsweise über eine Taste betätigbaren Schalter auf, über den die Ein- und Ausschaltung des Elektromagneten und die Ausschaltung des Elektromotors gesteuert ist.According to a further embodiment of the invention, the switching device has a common, preferably via a button actuated switch, via which the switching on and off of the electromagnet and the elimination of the electric motor is controlled.

Hierdurch ergibt sich eine weiter erhöhte Sicherheit gegen Fehlbedienungen, da der Schalter so zur Ein- und Ausschaltung des Elektromagneten und nur zum Ausschalten des Elektromotors ausgebildet ist. Somit kann durch eine Betätigung des Schalters vor Bohrbeginn gewährleistet werden, dass zunächst die Bohrmaschine mittels des Elektromagneten am Metallteil gehalten ist.This results in a further increased security against incorrect operation, since the switch is designed so as to switch on and off of the electromagnet and only to turn off the electric motor. Thus, it can be ensured by operating the switch before starting drilling that initially the drill is held by means of the electromagnet on the metal part.

Gemäß einer weiteren Ausführung der Erfindung ist zur Ein- und Ausschaltung des Elektromotors mindestens ein weiterer Schalter vorgesehen ist, der nur bei eingeschaltetem Elektromagneten eine Einschaltung des Elektromotors erlaubt.According to a further embodiment of the invention, at least one further switch is provided for switching on and off of the electric motor, which only allows the electric motor to be switched on when the electromagnet is switched on.

Dies hat den Vorteil, dass eine Einschaltung des Elektromotors nur über den zumindest einen weiteren Schalter möglich ist, wodurch Fehlbedienungen vermieden werden. Zur Ausschaltung des Elektromotors kann gleichfalls der weitere Schalter verwendet werden oder aber der zur Betätigung des Elektromagneten vorgesehene Schalter. Wird dieser betätigt, so wird zunächst der Elektromotor ausgeschaltet. Vorzugsweise erst mit zeitlicher Verzögerung oder bei Abfall der Drehzahl des Elektromotors unter einen vorgegebenen Grenzwert erfolgt dann eine Ausschaltung des Elektromagneten.This has the advantage that an activation of the electric motor is possible only via the at least one further switch, whereby incorrect operation can be avoided. To switch off the electric motor can also be used the other switch or provided for the actuation of the electromagnet switch. If this is actuated, the electric motor is first switched off. Preferably, only with a time delay or when the rotational speed of the electric motor falls below a predetermined limit value is then an elimination of the electromagnet.

Gemäß einer weiteren Ausführung der Erfindung weist die Bohrmaschine einen Ständerauf, an dem der Elektromagnet zur Befestigung an einem Metallteil vorgesehen ist, an dem eine Bohreinheit verfahrbar aufgenommen ist, wobei die Bohreinheit ein Gehäuse aufweist, in dem der Elektromotor zum Antrieb eines Werkzeugs aufgenommen ist, und wobei die Schalteinrichtung ein Bedien- und Kontrollfeld aufweist, das an einem dem Werkzeug abgewandten Ende des Gehäuses aufgenommen ist.According to a further embodiment of the invention, the drilling machine has a stator on which the electromagnet is provided for attachment to a metal part, on which a drilling unit is movably received, wherein the drilling unit has a housing in which the electric motor is received for driving a tool, and wherein the switching device has an operating and control panel, which is accommodated on an end of the housing facing away from the tool.

Diese Maßnahme hat den Vorteil, dass das Bedien- bzw. Kontrollfeld ständig während des Bohrvorgangs beobachtet werden. So können alle notwendigen Steuerungs-und Kontrollfunktionen während des Arbeitsvorgangs besser überwacht werden, was zu einer verbesserten Arbeitssicherheit führt.This measure has the advantage that the control panel is constantly observed during the drilling process. Thus, all necessary control and monitoring functions can be better monitored during the work process, resulting in improved safety at work.

In vorteilhafter Weiterbildung dieser Ausführung weist die Bohrmaschine ein Bedien-und Kontrollfeld auf, das eine Mehrzahl von Schaltelementen vorzugsweise in Form von Tasten aufweist, vorzugsweise ein Schaltelement zum Einschalten des Elektromotors im Linkslauf, ein Schaltelement zum Einschalten des Elektromotors im Rechtslauf, ein Schaltelement zum Ein- und Ausschalten einer Kühlschmiermittelzufuhr, ein Schaltelement zum Einschalten einer elektronischen Drehzahlabsenkung, und ein Schaltelement zum Ausschalten des Elektromotors.In an advantageous embodiment of this embodiment, the drill on a control and control panel, which has a plurality of switching elements preferably in the form of buttons, preferably a switching element for switching on the electric motor in reverse, a switching element for switching on the electric motor in the clockwise direction, a switching element for a - And off a cooling lubricant supply, a switching element for switching on an electronic speed reduction, and a switching element for switching off the electric motor.

Auf diese Weise hat der Bediener alle notwendigen Steuerungs- und Kontrollfunktionen während des Arbeitsvorgangs unmittelbar in seinem Sichtfeld.In this way, the operator has all the necessary control and monitoring functions during the work process directly in his field of vision.

In vorteilhafter Weiterbildung dieser Ausführungen ist zumindest eines der Schaltelemente, vorzugsweise sind sämtliche Schaltelemente, als Teil einer staubdichten Folientastatur oder einer Silikonschaltmatte ausgebildet.In an advantageous development of these embodiments, at least one of the switching elements, preferably all switching elements, are formed as part of a dust-proof membrane keyboard or a silicone switching mat.

Dies hat den Vorteil, dass eine Verschmutzungs- und Verklemmanfälligkeit der Schaltelemente deutlich reduziert wird.This has the advantage that a contamination and Verklemmanfälligkeit the switching elements is significantly reduced.

Gemäß einer weiteren Ausgestaltung der Erfindung ist ein Magnetkraftsensor zur Überwachung der magnetischen Haltekraft vorgesehen, der mit einer optischen und/oder akustischen Anzeige gekoppelt ist.According to a further embodiment of the invention, a magnetic force sensor for monitoring the magnetic holding force is provided, which is coupled to an optical and / or acoustic display.

Auf diese Weise wird die Arbeitssicherheit weiter erhöht. Zusätzlich kann der Magnetkraftsensor auch mit der Schalteinrichtung gekoppelt sein, um dann, wenn ein vorgegebener Grenzwert unterschritten wird, ein Anlaufen des Elektromotors zu vermeiden.In this way the safety at work is further increased. In addition, the magnetic force sensor may also be coupled to the switching device, in order then, when a predetermined limit value is exceeded, to avoid starting of the electric motor.

Es versteht sich, dass die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale der Erfindung nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung der Erfindung verwendbar sind, ohne den Rahmen der Erfindung zu verlassen.It is understood that the features of the invention to be explained below and those to be explained below can be used not only in the particular combination indicated, but also in other combinations or in isolation of the invention, without departing from the scope of the invention.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele unter Bezugnahme auf die Zeichnung. Es zeigen:

Fig. 1
eine perspektivische Darstellung einer erfindungsgemäßen Bohrma- schine in Form einer Kernlochbohrmaschine und
Fig. 2
eine vergrößerte Aufsicht auf das Ende des Gehäuses der Bohreinheit von oben.
Further features and advantages of the invention will become apparent from the following description of preferred embodiments with reference to the drawings. Show it:
Fig. 1
a perspective view of a drilling machine according to the invention in the form of a core hole drilling machine and
Fig. 2
an enlarged view of the end of the housing of the drilling unit from above.

In Fig. 1 ist eine erfindungsgemäße Bohrmaschine, die als Kernlochbohrmaschine ausgebildet ist, insgesamt mit der Ziffer 10 bezeichnet.In Fig. 1 is a drill according to the invention, which is designed as Kernlochbohrmaschine, generally designated by the numeral 10.

Die Bohrmaschine 10 weist einen Ständer 12 auf, der mittels eines Elektromagneten 14 auf einem ferromagnetischen Metallteil 28 befestigt werden kann. Am Ständer 12 ist eine Führung 30 vorgesehen, an der eine Bohreinheit 16 mittels eines Schlittens 32 verfahrbar aufgenommen ist.The drilling machine 10 has a stand 12, which can be fastened by means of an electromagnet 14 on a ferromagnetic metal part 28. On the stand 12, a guide 30 is provided, on which a drilling unit 16 is movably received by means of a carriage 32.

Die Bohreinheit 16 weist ein Gehäuse 18 auf, in dem ein Elektromotor 20 aufgenommen ist, der zum Antrieb einer Bohrspindel 22 ausgebildet ist. Am äußeren Ende der Bohrspindel 22 ist ein Bohrwerkzeug 26 mit Hilfe einer Aufnahme 24 lösbar befestigt. Im Gehäuse 18 ist ferner eine Steuerung 19 vorgesehen, die vorzugsweise als Mikroprozessorsteuerung ausgebildet ist. Die Steuerung 19 umfasst eine Schalteinrichtung, zu der ein an der Seite des Ständers 12 aufgenommener Magnetschalter 34 gehört, der zum Ein- und Ausschalten des Elektromagneten 14 und des Elektromotors 20 ausgebildet ist, wie nachfolgend noch erläutert wird.The drilling unit 16 has a housing 18, in which an electric motor 20 is accommodated, which is designed to drive a drill spindle 22. At the outer end of the drill spindle 22, a drilling tool 26 by means of a receptacle 24 is releasable attached. In the housing 18, a controller 19 is further provided, which is preferably designed as a microprocessor control. The controller 19 comprises a switching device to which a magnetic switch 34 received on the side of the stator 12 belongs, which is designed to switch on and off the electromagnet 14 and the electric motor 20, as will be explained below.

Die Schalteinrichtung umfasst ferner ein Bedien- und Kontrollfeld 38, das am dem Werkzeug 26 gegenüberliegenden Ende 36 des Gehäuses 18 aufgenommen ist und dessen Aufbau aus Fig. 2 näher ersichtlich ist.The switching device further comprises an operating and control panel 38, which is received on the tool 26 opposite end 36 of the housing 18 and its structure Fig. 2 can be seen in more detail.

Zum Vorschub der Bohreinheit 16 entlang der Führung 30 ist eine Vorschubeinheit 33 vorgesehen, die entweder automatisch betrieben werden kann oder durch manuelle Betätigung an einem der Hebel.For advancing the drilling unit 16 along the guide 30, a feed unit 33 is provided, which can either be operated automatically or by manual operation on one of the levers.

Das Bedien- und Kontrollfeld 38 weist insgesamt fünf Schaltelemente in Form von Tasten 40, 42, 44, 46, 48 auf, die als großflächige Tastfelder in einer Folientastatur 50 oder einer Silikonschaltmatte ausgebildet sind.The control and control panel 38 has a total of five switching elements in the form of buttons 40, 42, 44, 46, 48, which are designed as large-area touch panels in a membrane keypad 50 or a silicone keypad.

Das Schaltelement 40 ist zur Einschaltung des Elektromotors 20 im Linkslauf ausgebildet. Das Schaltelement 42 ist zur Einschaltung des Elektromotors 20 im Rechtslauf ausgebildet. Das Schaltelement 44 ist zum Ein- und Ausschalten der Kühlschmiermittelzufuhr ausgebildet. Das Schaltelement 46 ist zur Aktivierung einer elektronischen Drehzahlabsenkung ausgebildet.The switching element 40 is designed to switch on the electric motor 20 in reverse. The switching element 42 is designed to switch on the electric motor 20 in the clockwise direction. The switching element 44 is designed for switching on and off the cooling lubricant supply. The switching element 46 is designed to activate an electronic speed reduction.

Das von den übrigen vier Schaltelementen abgesetzte Schaltelement 48 ist zum Ausschalten des Elektromotors 20 ausgebildet.The remote from the other four switching elements switching element 48 is designed to turn off the electric motor 20.

An der Bohreinheit 16 ist ferner ein Drehzahlsensor 21 vorgesehen, der zur Überwachung der Motordrehzahl ausgebildet ist, um beispielsweise eine Abschaltung des Elektromagneten erst dann zu erlauben, wenn die Drehzahl z.B. kleiner als 10 U/min ist oder etwa gleich null ist.On the drilling unit 16, a speed sensor 21 is further provided, which is designed to monitor the engine speed, for example, to allow a shutdown of the solenoid only when the speed is, for example, less than 10 U / min or about equal to zero.

Am Elektromagneten 14 ist ferner ein Sensor 37 zur Erfassung der Magnethaltekraft vorgesehen, der mit einer Anzeige 52 (z.B. LED) für die Magnethaltekraft am Schaltelement 42 gekoppelt ist. Sofern die Magnethaltekraft einen bestimmten Schwellwert (der vom Bohrdurchmesser abhängig ist) unterschreitet, können zusätzlich der Schalter 34 und/oder die Schaltelemente 40, 42 blinken.On the electromagnet 14 there is further provided a sensor 37 for detecting the magnetic holding force, which is coupled to a display 52 (e.g., LED) for the magnetic holding force on the switching element 42. If the magnetic holding force falls below a certain threshold value (which depends on the drilling diameter), in addition the switch 34 and / or the switching elements 40, 42 can flash.

Der Magnetschalter 34, der an der Seite des Ständers 12 vorgesehen ist, ist nun derart mit der Steuerung 19 bzw. der Schalteinrichtung gekoppelt, dass zum Ausschalten des Elektromagneten 14 zunächst der Elektromotor 20 ausgeschaltet werden muss.The magnetic switch 34, which is provided on the side of the stator 12, is now coupled to the controller 19 or the switching device in such a way that the electric motor 20 first has to be switched off to switch off the electromagnet 14.

Bei laufendem Elektromotor 20 bewirkt also eine Betätigung der Taste des Magnetschalters 34, dass der Elektromotor 20 ausgeschaltet wird. Der Elektromagnet 14 kann dann automatisch mit einer ausreichenden zeitlich Verzögerung ausgeschaltet werden oder aber erst dann, wenn die vom Drehzahlsensor 21 erfasste Drehzahl unter einen bestimmten Schwellwert von z.B. 10 U/min abgefallen ist oder gleich null ist.When the electric motor 20 is running, therefore, an actuation of the key of the magnetic switch 34 causes the electric motor 20 to be switched off. The electromagnet 14 can then be switched off automatically with a sufficient time delay or only when the speed detected by the rotational speed sensor 21 falls below a certain threshold value of e.g. 10 rpm has dropped or is zero.

Bei ausgeschaltetem Elektromotor 20 und ausgeschaltetem Elektromagnet 14 bewirkt eine Betätigung der Taste des Magnetschalters 34 lediglich ein Einschalten des Elektromagneten 14.With the electric motor 20 switched off and the electromagnet 14 switched off, an actuation of the key of the magnetic switch 34 merely causes the electromagnet 14 to be switched on.

Ist der Magnetschalter 34 einmal zum Einschalten des Elektromagneten 14 aktiviert, so können die weiteren Funktionen der Kernlaufbohrmaschine über das Bedien- und Kontrollfeld 38 gesteuert werden, das am äußeren Ende 36 des Gehäuses 18 auf der dem Werkzeug 26 abgewandten Seite vorgesehen ist.Once the magnetic switch 34 has been activated to switch on the electromagnet 14, the further functions of the core drilling machine can be controlled via the operating and control panel 38 which is provided on the outer end 36 of the housing 18 on the side facing away from the tool 26.

Zur Einschaltung des Elektromotors 20 im Rechts- oder Linkslauf muss bei aktiviertem Elektromagneten 14 ein Schaltelement des Bedien- und Kontrollfeldes 38 betätigt werden.To switch on the electric motor 20 in the right or left rotation, a switching element of the control and control panel 38 must be actuated with activated electromagnet 14.

Bei zuvor betätigtem Magnetschalter 34 und somit aktiviertem Elektromagneten 14 führt eine Betätigung des Schaltelementes 40 zum Einschalten des Elektromotors 20 im Linkslauf. Dagegen führt eine Betätigung des Schaltelementes 42 bei aktiviertem Elektromagneten 14 zum Einschalten des Elektromotors 20 im Rechtslauf.In previously actuated magnetic switch 34 and thus activated electromagnet 14 performs an actuation of the switching element 40 for switching on the electric motor 20 in reverse. In contrast, performs an actuation of the switching element 42 with activated electromagnet 14 to turn on the electric motor 20 in the clockwise direction.

Mit dem Schaltelement 44 kann die Kühlschmiermittelzufuhr ein- bzw. ausgeschaltet werden. Mit dem Schaltelement 46 kann eine elektronische Drehzahlabsenkung aktiviert werden. Das Schaltelement 48 dient zum Ausschalten des Elektromotors 20.With the switching element 44, the coolant supply can be switched on or off. With the switching element 46, an electronic speed reduction can be activated. The switching element 48 serves to switch off the electric motor 20.

Claims (12)

  1. Drilling machine, in particular a core hole drilling machine, having an electromagnet (14) that is to be attached to a metal part (28), an electric motor (20) for driving a tool (36) and a switching device which comprises at least one switch (34, 40, 42) for switching on and off the electric motor (20) and the electromagnet (14), said switching device being configured so that in the activated condition of the electric motor (20) the electromagnet (14) can be switched off only when the electric motor (20) has been switched off before, characterized in that a speed sensor (21) is provided which is coupled to the switching device in a manner such that the electromagnet (14) can be switched off only when the electric motor (20) is running at a speed lower than or equal to a predefined threshold speed.
  2. The drilling machine as defined in claim 1, characterized in that the threshold speed is 150 r.p.m., in particular 100 r.p.m., 50 r.p.m. or 10 r.p.m.
  3. The drilling machine as defined in any of the preceding claims, characterized in that the switching device is being configured so that when the drilling machine (10) is switched on, the electromagnet (14) is switched on first and the electric motor (20) is switched on only in response to a further activation of the switching device.
  4. The drilling machine as defined in any of the preceding claims, characterized in that the switching device comprises a common switch (34), preferably one that can be activated via a push-button, for controlling the activation and deactivation of the electromagnet (14) and the deactivation of the electric motor (20).
  5. The drilling machine as defined in claim 4, characterized in that the common switch (34) is fixed on the side of a mount (12) of the drilling machine (10) on which a drilling unit (16), including the electric motor (20), is supported in displaceable fashion.
  6. The drilling machine as defined in any of the preceding claims, characterized in that at least one further switch (40, 42) is provided for switching on and off the electric motor, which permits the electric motor (20) to be switched on only in the activated condition of the electromagnet (14).
  7. Method for controlling a drilling machine, preferably a core hole drilling machine, comprising the steps of
    - monitoring the power-on condition of an electromagnet (16) intended to hold the drilling machine (10) on a metal part (28);
    - monitoring the activation of an electric motor (20) intended to drive a tool (26);
    - controlling the electric motor (20) and the electromagnet (14) so that in the activated condition of the electric motor (20) the electric motor (20) has to be switched off first and the electromagnet (14) can be switched off only in the inactive condition of the electric motor (20)
    - wherein the speed of the electric motor (20) is monitored and the electromagnet (14) can be switched off only when the speed of the electric motor (20) is lower than or equal to a defined threshold speed.
  8. The method as defined in claim 7, characterized in that the activated condition of the electric motor (20) and the electromagnet (14) is monitored and when switching on the drilling machine (10) the electromagnet (14) has to be switched on first before the electric motor (20) can be switched on.
  9. Drilling machine according to any of claims 1 to 6, in particular a core hole drilling machine, having a mount (12) on which an electromagnet (14) is provided for attachment to a metal part (28) on which a drilling unit (16) is supported in displaceable fashion, wherein the drilling unit (16) comprises a housing (18) that accommodates an electric motor (20) intended to drive a tool (26), and having a switching device comprising at least one switch (34, 40, 42) for switching on and off the electric motor (20) and the electromagnet (14), characterized in that the switching device comprises an operating and supervisory panel (38) that is received on an end (36) of the housing (18) opposite the tool (26).
  10. The drilling machine as defined in claim 9, characterized in that the operating and supervisory panel (38) has a plurality of switching elements (40, 42, 44, 46, 48), preferably in the form of push-buttons, preferably one switching element (40) for switching on the electric motor for counter-clockwise rotation, one switching element (42) for switching on the electric motor for clockwise rotation, one switching element (44) for switching on and off a coolant supply, one switching element (46) for switching on an electronic speed-reduction system, and one switching element (48) for switching off the electric motor (20).
  11. The drilling machine as defined in claim 9 or 10, characterized in that at least one of the switching elements (40, 42, 44, 46, 48) is configured as part of a dust-tight membrane keyboard or of a silicone sensor mat (50).
  12. The drilling machine as defined in any of claims 1 to 6 or 9 to 11, characterized in that a magnetic force sensor is provided for monitoring the magnetic holding force, the sensor being coupled to an optical and/or acoustic display.
EP09009078A 2008-07-23 2009-07-11 Drilling machine, in particular core hole drilling machine, and method for controlling such Active EP2147755B1 (en)

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DE102008035308A1 (en) 2010-01-28
EP2147755A2 (en) 2010-01-27
CN101633057B (en) 2014-08-20
US8568066B2 (en) 2013-10-29
US20100021249A1 (en) 2010-01-28
ATE555881T1 (en) 2012-05-15
PL2147755T3 (en) 2012-09-28
CN101633057A (en) 2010-01-27

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