EP3036070A1 - Vitesse de récupération pour carotteurs diamantés après un arrêt en fonction de la température (surchauffe du moteur) - Google Patents

Vitesse de récupération pour carotteurs diamantés après un arrêt en fonction de la température (surchauffe du moteur)

Info

Publication number
EP3036070A1
EP3036070A1 EP14750470.8A EP14750470A EP3036070A1 EP 3036070 A1 EP3036070 A1 EP 3036070A1 EP 14750470 A EP14750470 A EP 14750470A EP 3036070 A1 EP3036070 A1 EP 3036070A1
Authority
EP
European Patent Office
Prior art keywords
value
machine tool
drive
temperature
temperature value
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.)
Withdrawn
Application number
EP14750470.8A
Other languages
German (de)
English (en)
Inventor
Fabian Kabza
Oliver Koslowski
Egon Königbauer
Konrad Lieb
Markus Forstner
Torsten Asmus
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Priority to EP14750470.8A priority Critical patent/EP3036070A1/fr
Publication of EP3036070A1 publication Critical patent/EP3036070A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • B23Q11/14—Methods or arrangements for maintaining a constant temperature in parts of machine tools
    • 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
    • B23Q15/007—Automatic control or regulation of feed movement, cutting velocity or position of tool or work while the tool acts upon the workpiece
    • B23Q15/12—Adaptive control, i.e. adjusting itself to have a performance which is optimum according to a preassigned criterion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for

Definitions

  • the present invention relates to a method for controlling a machine tool when processing a material.
  • a machine tool such as a hammer drill, a drill, a circular saw or the like
  • a long-term use or in an intensive use can lead to a temperature-induced failure of the machine tool.
  • the drive of the machine tool which is usually realized in the form of an electric motor, requires a high voltage from the accumulator or (depending on the application) from the power grid. As a result, the electric motor designed as a drive generates a lot of heat.
  • a control unit monitors the temperature of the machine tool by means of sensors. In the event that a critical temperature is reached and exceeded inside the machine tool, the control unit is able to turn off the drive of the machine tool, whereby the heat generation of the drive can be counteracted. When switched off, the drive and the machine tool can cool down overall until the temperature has fallen below the critical value again and further work is possible again.
  • Such a machine tool is shown for example in DE-Offenlegungsschrift 4,238,564 A1.
  • DE 4 238 564 A1 discloses in particular a power tool with a suction device, which is connected to an external vacuum source.
  • the vacuum source serves to generate a cooling air flow through the electric motor.
  • a disadvantage of this procedure according to the prior art is that the machine tool requires a time indefinable for the user to cool down and as a result of this, working with the machine tool is interrupted for the indefinite period of time.
  • it can be assumed by the sudden shutdown of the machine tool in case of overheating that the machine tool is completely defective and, although this would be available again after cooling, the work with this supposedly "defective" machine tool will not continue.
  • a setting of the threshold value depending on the ambient temperature of the machine tool can be provided. This can be prevented, for example, that the threshold is set too low and this is too early or too fast exceeded.
  • displaying the exceeding or falling below the predetermined threshold value by means of a data display device of the machine tool may be advantageous.
  • the data display device can be realized in the form of a display element, a display, at least one lamp or in the form of an acoustic signal generator.
  • FIG. 1 side view of a machine tool with a drive and a control unit
  • FIG. 2 shows a diagram of the method according to the invention for controlling a machine tool when machining a material.
  • FIG. 1 shows a machine tool 1 which contains a housing 10, a drive 20, a tool 30, a drive shaft 40, a power source 50, a first temperature sensor 62, a second temperature sensor 64, a data display device 70 and a control unit 80.
  • the housing 10 consists essentially of a first portion 1 1, in which the drive 20, the first temperature sensor 62, the second temperature sensor 64 and the control unit 80 is located, and from a second portion 12, a handle 13, a switch 14th and the power source 50 includes.
  • the switch 14 is connected to the control unit 80 via a line 15, so that by actuating the switch 14, the control unit 80 takes the drive 20 into operation. By releasing the switch 14, the drive 20 is stopped by the control unit 80.
  • the control unit 80 thus serves primarily to control the drive 20.
  • the drive 20 is an electric motor and the tool 30 is designed as a drill.
  • the energy source 50 is designed as an accumulator. Alternatively, however, the power source 50 may be a power source (outlet) connected to a power cord. Both the power cord and the power source are not shown in the figures.
  • the power source 50 supplies the drive 20 via a line 16 with power.
  • the drive shaft 40 includes a first end 42 and a second end 44, wherein the first end 42 is connected to the formed as an electric motor drive 20 that a torque generated in the electric motor 20 is transmitted to the configured as a drill tool 30.
  • the drill 30 is connected at a first end 32 to the second end 44 of the drive shaft 40.
  • a second end 34 of the drill 30 is used to drill a hole Q in a material W.
  • a material W for example, concrete, stone, wood or the like may be provided.
  • the data display device 70 is positioned on the first portion 1 1 of the housing 10 and formed in the form of a display. On the display device 70, the user (not shown) of the machine tool 1 can read data, parameters and information related to the machine tool 1.
  • the first temperature sensor 62 is connected to the electric motor 20 so that it can constantly measure the temperature of the electric motor 20.
  • the first temperature sensor 62 is also connected via the line 17 in connection with the control unit 80 in order to transmit the measured temperature values to the control unit 80.
  • the second temperature sensor 64 is connected to the housing 10 of the machine tool 1 so that it can measure the ambient temperature.
  • the second temperature sensor 64 is connected via a line 18 to the control unit 80. Measured temperature values can be sent to the control unit 80 via the connection 18.
  • Threshold values are stored in the control unit 80, by means of which comparison with the measured temperature values the control unit 80 can determine a critical temperature development in the machine tool 1.
  • the determination of the threshold values is dependent on the respective ambient temperature of the machine tool 1, which is measured by the second temperature sensor 64. This means that when the ambient temperature is low, the thresholds are set and set accordingly low. In contrast, at high ambient temperatures, the thresholds are selected and set correspondingly high.
  • FIG. 2 shows a flow chart of the method for controlling the machine tool 1 when processing a material W.
  • step S1 the speed of the drive 20 is first set to a value of 1.
  • the value 1 corresponds to a medium to high working speed.
  • step S2 a first temperature value of the drive 20 designed as an electric motor is measured by the first temperature sensor 62.
  • step S3 the first temperature value of the drive 20 measured by the first temperature sensor 62 is adjusted to the predetermined threshold value.
  • step S4 it is then determined whether or not the first temperature value of the drive 20 has exceeded the threshold value.
  • step S2 In the event that the threshold has not been exceeded, the process continues with step S2.
  • step S5 follows, in which it is determined whether the threshold has been exceeded for a predetermined first period of time.
  • step S2 In the event that the threshold has not been exceeded, the predetermined first period of time, followed by step S2 again.
  • step S6 follows, in which the speed of the drive 20 is reduced from the value 1 to a value 2.
  • the value 2 corresponds to a low working speed. With the low operating speed can be achieved on the one hand that the drive 20 of the machine tool 1 can cool down, since now less power is drawn from the drive 20 from the accumulator 50, and on the other hand, working with the machine tool 1 can be continued. Although the speed and thus the power output of the drive 20 are reduced accordingly, but the machine tool 1 is not completely switched off, whereby a slower work is still possible.
  • the current status of the machine tool 1 is displayed to the user with the aid of the data display device 70 embodied as a display.
  • the user learns that the machine tool 1 is currently overheated and the low operating speed is not the result of damage to the machine tool 1, but that the low operating speed for cooling the drive 20 and thus prevents damage.
  • the length of the first period of time is dependent on the threshold value and the ambient temperature of the machine tool 1. This means that a long first time period is selected and set when the threshold and the ambient temperature are correspondingly low. On the other hand, a short first time period is selected and set when the threshold and the ambient temperature are correspondingly high. With a long first time period, it can be achieved that (when the threshold and the ambient temperature are low), the speed of the drive 20 is not reduced from the value 1 to a value 2 early, just because a low threshold has been exceeded for a short time. For efficient operation with the machine tool 1 at a high speed, a one-time and short-term exceeding of the threshold value can be tolerated, since usually the short crossing does not result in any damage to the machine tool 1.
  • step S7 in which a second temperature value of the drive 20 is measured by the first temperature sensor 62.
  • step S8 the second temperature value of the drive 20 measured by the first temperature sensor 62 is adjusted to the predetermined threshold value.
  • step S9 it is then determined whether the second temperature value of the drive 20 is still exceeding the threshold value or not.
  • step S7 In the event that the threshold value is still exceeded, the method is continued with step S7.
  • step S10 it is determined in step S10 whether a predetermined second time duration has been exceeded.
  • step S7 If the second temperature value of the drive 20 does not fall below the threshold value at least for the second time duration, the method is also continued with step S7.
  • step S11 the rotational speed of the engine 20 is increased from the lower value 2 (low operating speed) to the higher value 1 (medium to high operating speed).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Numerical Control (AREA)
  • Control Of Electric Motors In General (AREA)
  • Earth Drilling (AREA)
  • Automatic Control Of Machine Tools (AREA)
  • Machine Tool Sensing Apparatuses (AREA)

Abstract

L'invention concerne un procédé de commande d'une machine-outil (1) lors de l'usinage d'un matériau (W), comprenant les étapes consistant à : régler la vitesse de rotation d'un entraînement (20) de la machine-outil à une première valeur ; mesurer une première valeur de température ; comparer la première valeur de température à une valeur seuil prédéfinie ; réduire la vitesse de rotation de l'entraînement (20) de la première valeur à une deuxième valeur lorsque la première valeur de température dépasse la valeur seuil prédéfinie pendant une première durée prédéfinie ; mesurer une deuxième valeur de température ; comparer la deuxième valeur de température à la valeur seuil prédéfinie ; et augmenter la vitesse de rotation de l'entraînement (20) de la deuxième à la première valeur lorsque la deuxième valeur de température descend en dessous de la valeur seuil prédéfinie pendant une deuxième durée prédéfinie.
EP14750470.8A 2013-08-19 2014-08-12 Vitesse de récupération pour carotteurs diamantés après un arrêt en fonction de la température (surchauffe du moteur) Withdrawn EP3036070A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14750470.8A EP3036070A1 (fr) 2013-08-19 2014-08-12 Vitesse de récupération pour carotteurs diamantés après un arrêt en fonction de la température (surchauffe du moteur)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP13180865.1A EP2839932A1 (fr) 2013-08-19 2013-08-19 Régime de reprise pour perceuses à âme en diamant après une désactivation de température (surchauffe du moteur)
PCT/EP2014/067195 WO2015024809A1 (fr) 2013-08-19 2014-08-12 Vitesse de récupération pour carotteurs diamantés après un arrêt en fonction de la température (surchauffe du moteur)
EP14750470.8A EP3036070A1 (fr) 2013-08-19 2014-08-12 Vitesse de récupération pour carotteurs diamantés après un arrêt en fonction de la température (surchauffe du moteur)

Publications (1)

Publication Number Publication Date
EP3036070A1 true EP3036070A1 (fr) 2016-06-29

Family

ID=49000836

Family Applications (2)

Application Number Title Priority Date Filing Date
EP13180865.1A Withdrawn EP2839932A1 (fr) 2013-08-19 2013-08-19 Régime de reprise pour perceuses à âme en diamant après une désactivation de température (surchauffe du moteur)
EP14750470.8A Withdrawn EP3036070A1 (fr) 2013-08-19 2014-08-12 Vitesse de récupération pour carotteurs diamantés après un arrêt en fonction de la température (surchauffe du moteur)

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP13180865.1A Withdrawn EP2839932A1 (fr) 2013-08-19 2013-08-19 Régime de reprise pour perceuses à âme en diamant après une désactivation de température (surchauffe du moteur)

Country Status (4)

Country Link
US (1) US20160184952A1 (fr)
EP (2) EP2839932A1 (fr)
RU (1) RU2016109923A (fr)
WO (1) WO2015024809A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10131042B2 (en) 2013-10-21 2018-11-20 Milwaukee Electric Tool Corporation Adapter for power tool devices
DE102015217053A1 (de) * 2015-09-07 2017-03-09 Robert Bosch Gmbh Handwerkzeugmaschine
JP6453919B2 (ja) 2017-01-26 2019-01-16 ファナック株式会社 行動情報学習装置、行動情報最適化システム及び行動情報学習プログラム
EP3749489B1 (fr) 2018-06-26 2023-03-22 Lukas Hydraulik GmbH Appareil de travail portatif pour l'utilisation portable
JP7249558B2 (ja) * 2018-09-07 2023-03-31 パナソニックＩｐマネジメント株式会社 電動工具および処理装置
EP3653342B1 (fr) * 2018-10-26 2024-01-17 Max Co., Ltd. Outil électrique
EP3905527A1 (fr) * 2020-04-29 2021-11-03 Hilti Aktiengesellschaft Machine-outil guidée à la main
US12466047B2 (en) 2023-03-22 2025-11-11 Milwaukee Electric Tool Corporation Power tools including a plurality of temperature sensors

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4238564C2 (de) 1992-11-14 1995-02-23 Fein C & E Elektrowerkzeug
US7341171B2 (en) * 2004-02-09 2008-03-11 Illinois Tool Works Inc. Fan control for combustion-powered fastener-driving tool
JP5122750B2 (ja) * 2006-02-23 2013-01-16 パナソニック株式会社 電動工具
GB2438877A (en) * 2006-06-07 2007-12-12 Anglia Polytechnic University An environment sensing power tool and control system
JP5376392B2 (ja) * 2008-02-14 2013-12-25 日立工機株式会社 電動工具
JP4793425B2 (ja) * 2008-11-10 2011-10-12 パナソニック電工株式会社 充電式電動工具

Non-Patent Citations (1)

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Title
See references of WO2015024809A1 *

Also Published As

Publication number Publication date
RU2016109923A (ru) 2017-09-26
EP2839932A1 (fr) 2015-02-25
WO2015024809A1 (fr) 2015-02-26
US20160184952A1 (en) 2016-06-30

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