WO2021039186A1 - Outil d'usinage portatif - Google Patents

Outil d'usinage portatif Download PDF

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Publication number
WO2021039186A1
WO2021039186A1 PCT/JP2020/027865 JP2020027865W WO2021039186A1 WO 2021039186 A1 WO2021039186 A1 WO 2021039186A1 JP 2020027865 W JP2020027865 W JP 2020027865W WO 2021039186 A1 WO2021039186 A1 WO 2021039186A1
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WO
WIPO (PCT)
Prior art keywords
electromagnet
machine tool
value
magnetic sensor
control unit
Prior art date
Application number
PCT/JP2020/027865
Other languages
English (en)
Japanese (ja)
Inventor
淳 井戸田
Original Assignee
日東工器株式会社
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 日東工器株式会社 filed Critical 日東工器株式会社
Priority to CN202080047956.0A priority Critical patent/CN114080297B/zh
Priority to DE112020004086.0T priority patent/DE112020004086T5/de
Priority to JP2021542621A priority patent/JP7182721B2/ja
Priority to AU2020338309A priority patent/AU2020338309B2/en
Priority to GB2118751.3A priority patent/GB2600572B/en
Publication of WO2021039186A1 publication Critical patent/WO2021039186A1/fr

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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
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/15—Devices for holding work using magnetic or electric force acting directly on the work
    • B23Q3/154—Stationary devices
    • B23Q3/1543—Stationary devices using electromagnets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
    • B23B45/02—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor driven by electric power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B47/00—Constructional features of components specially designed for boring or drilling machines; Accessories therefor
    • 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
    • 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
    • B23Q17/00—Arrangements for observing, indicating or measuring on 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
    • B23Q9/00—Arrangements for supporting or guiding portable metal-working machines or apparatus
    • B23Q9/02—Arrangements for supporting or guiding portable metal-working machines or apparatus for securing machines or apparatus to workpieces, or other parts, of particular shape, e.g. to beams of particular cross-section
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2260/00—Details of constructional elements
    • B23B2260/122—Safety devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2260/00—Details of constructional elements
    • B23B2260/128—Sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2270/00—Details of turning, boring or drilling machines, processes or tools not otherwise provided for
    • B23B2270/38—Using magnetic fields
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2270/00—Details of turning, boring or drilling machines, processes or tools not otherwise provided for
    • B23B2270/48—Measuring or detecting

Definitions

  • the present invention relates to a portable machine tool, and more specifically, to a portable machine tool in which a machine tool body is fixed to an object to be machined by an electromagnet.
  • Patent Documents 1 and 2 There is a portable machine tool such as a drilling machine that is carried to the work site to process the work piece. Such a portable machine tool is fixed to the work piece by various methods, but in consideration of ease of handling and convenience, it is fixed to the work piece by magnetic adsorption by an electromagnet. There is something that I did. (Patent Documents 1 and 2)
  • Magnetic attraction by an electromagnet is usually designed to be a sufficiently large force, but the reaction force received during machining work and other external forces applied to the machine tool body cause the machine tool body to lift from the work piece. There is. Then, a gap is created between the electromagnet and the work piece, and the magnetic attraction force of the electromagnet sharply decreases, making it impossible to fix the portable machine tool to the work piece, causing the portable machine tool to fall or fall. There is a risk of This is especially dangerous if the portable machine tool falls while a machining tool such as a drill or an annular cutter is being rotationally driven.
  • a Hall element for measuring the magnetic flux generated from the electromagnet is provided, and it is determined that floating occurs when the output voltage V of the Hall element exceeds a predetermined threshold value Va. The rotation of the drill motor and feed motor is stopped.
  • the magnitude of the magnetic flux density around the electromagnet when the electromagnet is magnetically attracted to the work piece changes depending on the thickness and material of the work piece. Therefore, when the predetermined threshold value is set to a relatively large value based on the case where the workpiece is relatively thick or the material has relatively strong magnetism, it is relatively thin or compared. When the work piece is magnetically attracted to a work piece having weak magnetism, it becomes impossible to properly detect the floating, and conversely, it is based on the case where the work piece is relatively thin or the material has relatively weak magnetism. If a predetermined threshold value is set to a relatively small value, it may not be possible to properly detect the floating when magnetically attracted to a work piece having a relatively thick or relatively strong magnetism. There is.
  • an object of the present invention is to provide a portable machine tool capable of appropriately detecting the lifting of an electromagnet even if the plate thickness and material of the work piece magnetically attracted by the electromagnet are different.
  • the present invention Machine tool body and An electromagnet attached to the machine tool body and fixing the machine tool body to the work piece, A magnetic sensor arranged around the electromagnet and A control unit designed to control the operation of the electromagnet, A drive unit for driving a machining tool attached to the machine tool body so as to perform machining work on the workpiece.
  • the magnetic sensor after the control unit sets the normal operating range based on the output value of the magnetic sensor while the electromagnet is operating and before the machining work by the drive unit is started, and after the machining work is started.
  • a portable machine tool in which it is determined that the electromagnet is lifted from the workpiece when the output value of is out of the normal operating range.
  • the normal operating range is set based on the output value of the magnetic sensor measured before the electromagnet is operating and the electric motor is driven to start the machining work.
  • An appropriate normal operating range can be set according to the thickness and material of the work piece to which the electromagnet magnetically attracts. As a result, it is possible to appropriately detect the determination of the lift of the electromagnet even if the plate thickness and material of the workpiece are different.
  • the magnetic sensor is adapted to detect the magnetic flux density in the magnetic circuit of the electromagnet formed through the workpiece, and the output value is a value indicating the magnitude of the magnetic flux density. Can be done.
  • the normal operating range is a range in which the floating determination reference value determined based on the magnitude of the output value is set as the lower limit value.
  • the control unit is designed to detect the supply voltage to the electromagnet.
  • the control unit can set the normal operating range based on the output value of the magnetic sensor and the supply voltage before the processing work by the driving unit is started while the electromagnet is operating. ..
  • control unit can reset the normal operating range based on the magnitude of the supply voltage.
  • the control unit raises the normal operating range by a predetermined first floating. Set the judgment reference value to the lower limit and set it to the lower limit.
  • the control unit sets the normal operating range smaller than the first floating determination reference value. It is possible to set a predetermined second lift determination reference value in a range set as a lower limit value.
  • It also has a display unit that displays the status of the portable machine tool.
  • a display unit that displays the status of the portable machine tool.
  • the portable machine tool 1 includes a machine tool main body 10 and an electromagnet 12 attached to the lower side of the machine tool main body 10.
  • a battery 14 serving as a main power source for the portable machine tool 1 is detachably attached to the rear of the machine tool main body 10.
  • the machine tool main body 10 includes a machining tool mounting portion 18 to which an annular cutter 16 (machining tool) can be detachably attached, and the machining tool mounting portion 18 is rotationally driven in the machine tool main body 10.
  • An electric motor 20 driving unit for the purpose is provided.
  • the machining tool mounting portion 18 and the electric motor 20 are drive-connected via a gear mechanism 22 composed of a plurality of gears.
  • a gear mechanism 22 composed of a plurality of gears.
  • the electromagnet 12 has a ring-shaped second coil 30 as well as a ring-shaped first coil 26.
  • the portable machine 1 is placed on the magnetic material and the power from the battery 14 is supplied to the first coil 26 and the second coil 30, the magnetic attraction generated by the electromagnet 12 causes the machine main body. 10 is fixed to a work piece which is a magnetic material.
  • the portable machine tool 1 is processed by pressing an annular cutter 16 rotationally driven by an electric motor 20 against the workpiece while the machine tool body 10 is fixed to the workpiece by an electromagnet 12. It is a drilling machine designed to perform processing work on objects.
  • a motor drive switch 34 for starting the drive of the electric motor 20, a motor stop switch 36 for stopping the drive of the electric motor 20, and an electromagnet 12
  • An electromagnet switch 38 for starting and stopping the operation of the motor is arranged.
  • a lighting switch 40 is also arranged on the side surface of the machine tool main body 10. The lighting switch 40 is used to turn on and off a lighting device (not shown) arranged on the front lower surface of the machine tool main body 10. All of these switches 34, 36, 38, and 40 are push-button momentary switches that turn on only while they are pressed and return to the off state when they are released.
  • the machine tool main body 10 is further provided with an LED display unit 41 for indicating the state of the portable machine tool 1 to an operator.
  • a magnetic sensor 42 is attached to the electromagnet 12.
  • the magnetic sensor 42 measures the magnitude of the magnetic flux density in the magnetic circuit of the electromagnet 12 formed around the electromagnet 12 through the workpiece.
  • the portable machine tool 1 has a control circuit board 46 in the machine tool main body 10, and the control circuit board 46 is provided with a control unit 48 (FIG. 3) for controlling an electric motor 20, an electromagnet 12, and the like. ing.
  • a control unit 48 (FIG. 3) for controlling an electric motor 20, an electromagnet 12, and the like.
  • the control unit 48 drives the electric motor 20 and operates the electromagnet 12 according to the operating state of the motor drive switch 34, the motor stop switch 36, and the electromagnet switch 38, and the operating state of the portable machine tool 1 at that time. Control.
  • the control unit 48 transmits a control signal to the motor control unit 52 to control the rotation speed of the electric motor 20.
  • the control unit 48 detects the amount of current flowing through the electric motor 20 by the motor current detection unit 54 and monitors the load status of the electric motor 20.
  • the control unit 48 controls the electric power supplied to the first coil 26 and the second coil 30 via the coil control circuit 56. Since the first coil 26 and the second coil 30 are connected in series, the electric power supplied to the first coil 26 and the second coil 30 is usually the same.
  • the coil disconnection detection circuit 58 detects the disconnection of the first coil 26 and the second coil 30 by detecting the current flowing through the first coil 26 and the second coil 30.
  • the control unit 48 stops the control and lights the LED display unit 41 to notify the user that the coils 26 and 30 are disconnected. Further, the control unit 48 remembers that the coils 26 and 30 are disconnected, and turns on the LED display unit 41 when the battery 14 is once disconnected and then reconnected and the control of the control unit 48 is resumed. It is also designed to notify the user that the coils 26 and 30 are broken.
  • the control circuit board 46 is further provided with a power supply voltage detection circuit 60 for detecting the voltage (power supply voltage) of the battery 14 connected to the machine tool main body 10.
  • the control by the control unit 48 is started (S10).
  • the control unit 48 determines whether or not the electromagnet switch 38 is not pressed and is in the OFF state (S12). In the case of the OFF state, when the electromagnet switch 38 is pressed to change from the OFF state to the ON state (S18), the control unit 48 starts the operation of the electromagnet 12 (S20).
  • the electromagnet 12 is activated, the portable machine tool 1 is fixed to the workpiece by the magnetic attraction force of the electromagnet 12.
  • the control unit 48 When the electromagnet switch 38 is not in the OFF state when the control is started, that is, when the electromagnet switch 38 is pressed and is in the ON state (S12), the control unit 48 does not start the operation of the electromagnet 12, and the operation of the electromagnet 12 is not started.
  • the state continues for 5 seconds (S14) the LED display unit 41 is blinked to display a warning (S16).
  • the operation of the electromagnet 12 is started at the same time as the control is started to prevent unexpected magnetic attraction. ..
  • step S18 Even if the motor drive switch 34 is turned on before the operation of the electromagnet 12 is started, the control unit 48 does not start driving the electric motor 20.
  • the control unit 48 measures the magnetic flux density around the electromagnet 12 by the magnetic sensor 42 (S22).
  • the output value of the magnetic sensor 42 indicating the magnitude of the measured magnetic flux density is equal to or higher than the predetermined first threshold value X [V] (S24)
  • the control unit 48 is a member of the member to which the electromagnet 12 is magnetically attracted. It is determined that the plate thickness is ⁇ [mm] or more (S26), and the blue color of the LED display unit 41 is used to show the operator that the plate thickness is sufficient and the magnetic attraction force of the electromagnet 12 is sufficient.
  • the LED is turned on (S28).
  • the control unit 48 When the output value of the magnetic sensor 42 is less than X [V] (S24) and greater than or equal to a predetermined second threshold value Y [V] smaller than X (S30), the control unit 48 has a plate thickness of ⁇ [mm]. ] And ⁇ [mm] or more (S32), and the LED display unit 41 is used to show the operator that the plate thickness is slightly thin and the magnetic attraction force of the electromagnet 12 is slightly small, although it is within the safe operating range. Turn on the yellow LED (S34).
  • the safe operating range refers to the range of the magnetic flux density at which a magnetic attraction force having a magnitude that allows the processing work by the portable machine tool 1 to be performed without danger is generated. In the state where the blue LED or the yellow LED is lit, when the motor drive switch 34 is pressed to turn on (S38), the control unit 48 starts driving the electric motor 20 (S40).
  • the control unit 48 When the output value of the magnetic sensor 42 is less than Y [V] and is not within the safe operating range (S30), the control unit 48 indicates that the plate thickness is too thin to obtain a sufficient magnetic attraction force. A red LED is lit on the LED display unit 41 to indicate the above (S36). In this state, even if the motor drive switch 34 is pressed to turn on, the control unit 48 does not start driving the electric motor 20.
  • the control unit 48 controls the control shown in FIG. 6 for detecting the lifting of the portable machine tool 1 during the machining work and the change in the plate thickness of the workpiece.
  • the control unit 48 confirms whether the plate thickness of the work piece is determined to be ⁇ [mm] or more (S52).
  • the control unit 48 compares the output value of the magnetic sensor 42 with the predetermined first lift determination reference value A [V] (S54).
  • the first lift determination reference value A [V] is a lower limit value of the normal operation range set when the plate thickness is ⁇ [mm] or more, and is smaller than the first threshold value X [V].
  • the normal operating range is a range of magnetic flux densities that can be regarded as the portable machine tool 1 not being lifted from the work piece and being properly fixed to the work piece during the machining work.
  • the control unit 48 determines that the electromagnet 12 has lifted from the workpiece. In order to show this to the operator, the red LED of the LED display unit 41 is turned on (S56), and the driving of the electric motor 20 is stopped (S58). After the electric motor 20 is stopped, the control by the control unit 48 returns to the above step 22.
  • step S54 when the output value of the magnetic sensor 42 is equal to or higher than the first lift determination reference value (A [V]), that is, within the normal operating range, the control unit 48 has not lifted the electromagnet 12 from the workpiece. Judging, the driving of the electric motor 20 is continued.
  • the motor stop switch 36 is pressed to turn on (S66) or the electromagnet switch 38 is pressed to turn on (S68) while the electric motor 20 continues to be driven, the control unit 48 The drive of the electric motor 20 is stopped (S58), and the control returns to the control in step S22.
  • both the motor stop switch 36 and the electromagnet switch 38 are not pressed and are in the OFF state, the magnetic flux density around the electromagnet 12 is measured again by the magnetic sensor 24 (S70), and the control returns to the control in step S52.
  • the output value of the magnetic sensor 42 is determined to be a predetermined second floating determination. Compare with the reference value B [V] (S60).
  • the second lift determination reference value B [V] is the lower limit value of the normal operation range when the plate thickness is less than ⁇ [mm] and ⁇ [mm] or more, and is the second threshold value Y [V] and the first lift. It is a value smaller than the judgment reference value A [V].
  • the control unit 48 determines that the electromagnet 12 has lifted from the workpiece. In order to show it to the operator, the red LED of the LED display unit 41 is turned on (S56), and the driving of the electric motor 20 is stopped (S58).
  • the control unit 48 compares the output value of the magnetic sensor 12 with the first threshold value X [V] (S62). When the output value of the magnetic sensor 42 is X [V] or more, it is determined that the plate thickness has increased to ⁇ [mm] or more (S64).
  • the normal operating range is set based on the output value of the magnetic sensor 42 while the electromagnet 12 is operating and before the machining work by the electric motor 20 is started. .. Therefore, an appropriate normal operating range can be set according to the plate thickness of the work piece to which the electromagnet 12 magnetically attracts, and it becomes possible to more stably and appropriately determine whether the electromagnet 12 is lifted.
  • the output value of the magnetic sensor 42 also decreases when the electromagnet 12 moves from a relatively thick portion to a relatively thin portion.
  • the control unit 48 determines that the electromagnet 12 has been lifted. That is, the determination that the surface has floated in the present application may include the determination that the skidding has occurred as described above.
  • the supply voltage to the electromagnet 12 that is, the voltage of the battery 14 (power supply voltage) is measured (S100), and the measured power supply voltage is compared with the predetermined threshold value Z [V]. (S102).
  • each threshold value or reference value (X, Y, Z, A, B) is increased by a predetermined increase / decrease value (a, b, c, d, e).
  • Change (S104) That is, a is added to X, b is added to Y, c is added to Z, d is added to A, and e is added to B.
  • the measured power supply voltage is compared with the changed Z [V] (S106), and when the power supply voltage is Z [V] or more, each threshold value or reference value (X, Y, Z, A, B) is set.
  • the value is changed to a larger value by a predetermined increase / decrease value (a, b, c, d, e) (S104). This is performed until the measured power supply voltage becomes less than the changed Z [V].
  • each threshold value or reference value (X, Y, Z, A, B) is reduced by a predetermined increase / decrease value (a, b, c, d, e). Change (S108).
  • the measured power supply voltage is compared with the changed Z [V] (S110), and when the measured power supply voltage is Z [V] or less, each threshold value or reference value (X, Y, Z, A, B) ) Is changed to a smaller value by a predetermined increase / decrease value (a, b, c, d, e) (S108). This is done until the power supply voltage becomes larger than the changed Z [V].
  • the power supply voltage (19.5 V) is larger than 18 V (S102). Is reset to 19V, which is 1V higher (S104). Since the power supply voltage (19.5V) is not less than the modified Z (19V) (S106), Z is reset to 20V, which is 1V higher (S104). Then, since the power supply voltage (19.5V) becomes less than the changed Z (20V), the resetting of the threshold value in FIG. 7 is completed. During this period, other threshold values and reference values (X, Y, A, B) are also reset to larger values according to the corresponding increase / decrease values (a, b, d, e).
  • the above-mentioned resetting of the threshold value based on the power supply voltage is performed before the electric motor 20 is driven to start the machining work (after S22 in FIG. 5) and before the electric motor 20 is driven to start the machining work. It is supposed to be performed in the middle (after S70 in FIG. 6).
  • the power supply voltage decreases as the remaining battery level decreases, and the voltage supplied to the electromagnet 12 also decreases. Then, the magnetic flux density generated around the electromagnet 12 becomes small. That is, the magnitude of the magnetic flux density generated around the electromagnet 12 depends not only on the plate thickness of the workpiece but also on the magnitude of the power supply voltage.
  • the magnitude of each threshold value and the reference value is changed according to the magnitude of the power supply voltage to reset the normal operating range, the change in the magnetic flux density due to the change in the power supply voltage is judged to be lifted. By reducing the effect, it is possible to detect the floating of the electromagnet 12 more stably.
  • the present invention is not limited to these embodiments.
  • it may be a machine tool to which other processing tools such as a drill can be attached instead of the annular cutter.
  • the battery is used as the main power source in the above embodiment, an external power source such as an AC power source may be used as the main power source.
  • the electric motor is used as the drive unit, another device such as an air motor may be used as the drive unit.
  • the plate thickness is determined in three stages of ⁇ [mm] or more, less than ⁇ [mm] ⁇ [mm] or more, and less than ⁇ [mm] to set the normal operating range. The plate thickness may be determined steplessly to set the normal operating range.
  • the magnitude of the magnetic flux density generated around the electromagnet also changes depending on the material of the work piece to which the electromagnet is magnetically attracted. Therefore, when the portable machine tool is used for workpieces of different materials, it is not always necessary to judge the plate thickness, and it is based on the output value of the magnetic sensor before the machining work.
  • the normal operating range may be set directly.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Numerical Control (AREA)
  • Machine Tool Sensing Apparatuses (AREA)

Abstract

Le problème décrit par la présente invention est de fournir un outil d'usinage portatif avec lequel il est possible de détecter le flottement d'un électroaimant de manière plus appropriée même lorsque l'épaisseur d'une pièce à usiner devant être attirée magnétiquement par l'électroaimant est différente. La solution selon l'invention porte sur un outil d'usinage portatif 1 qui comprend : un électroaimant 12 pour fixer un corps d'outil d'usinage 10 par rapport à une pièce à usiner ; un capteur magnétique 42 disposé autour de l'électroaimant ; un moteur électrique 20 pour entraîner en rotation un dispositif de coupe annulaire 16 ; et une unité de commande 48 pour commander l'électroaimant 12 et le moteur électrique 20. L'unité de commande 48 définit une plage de fonctionnement normal sur la base d'une valeur de sortie provenant du capteur magnétique 42 pendant le fonctionnement de l'électroaimant 12 et avant l'entraînement du moteur électrique 20 pour démarrer une tâche d'usinage avec le dispositif de coupe annulaire 16. En outre, lorsque la valeur de sortie provenant du capteur magnétique 42 après le début de la tâche d'usinage est hors de la plage de fonctionnement normal, l'unité de commande 48 détermine que l'électroaimant 12 a fait flotter à partir de la pièce à usiner et arrête l'entraînement du moteur électrique 20.
PCT/JP2020/027865 2019-08-28 2020-07-17 Outil d'usinage portatif WO2021039186A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN202080047956.0A CN114080297B (zh) 2019-08-28 2020-07-17 便携式机床
DE112020004086.0T DE112020004086T5 (de) 2019-08-28 2020-07-17 Tragbare Werkzeugmaschine
JP2021542621A JP7182721B2 (ja) 2019-08-28 2020-07-17 可搬型工作機
AU2020338309A AU2020338309B2 (en) 2019-08-28 2020-07-17 Portable machining tool
GB2118751.3A GB2600572B (en) 2019-08-28 2020-07-17 Portable machine tool

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-155655 2019-08-28
JP2019155655 2019-08-28

Publications (1)

Publication Number Publication Date
WO2021039186A1 true WO2021039186A1 (fr) 2021-03-04

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JP (1) JP7182721B2 (fr)
AU (1) AU2020338309B2 (fr)
DE (1) DE112020004086T5 (fr)
GB (1) GB2600572B (fr)
WO (1) WO2021039186A1 (fr)

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JPS57102709A (en) * 1980-12-12 1982-06-25 Hitachi Koki Co Ltd Magnetic boring machine
JPH03126512U (fr) * 1990-01-26 1991-12-19
JP2014231129A (ja) * 2013-05-30 2014-12-11 日東工器株式会社 バッテリ式穿孔機
US20170217010A1 (en) * 2016-02-01 2017-08-03 Milwaukee Electric Tool Corporation Holding force detection for magnetic drill press

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JP7182721B2 (ja) 2022-12-02
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JPWO2021039186A1 (fr) 2021-03-04
CN114080297A (zh) 2022-02-22
GB2600572A (en) 2022-05-04
GB2600572B (en) 2023-03-29

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