WO2017003196A1 - Procédé de commande pour outil électrique - Google Patents

Procédé de commande pour outil électrique Download PDF

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Publication number
WO2017003196A1
WO2017003196A1 PCT/KR2016/006999 KR2016006999W WO2017003196A1 WO 2017003196 A1 WO2017003196 A1 WO 2017003196A1 KR 2016006999 W KR2016006999 W KR 2016006999W WO 2017003196 A1 WO2017003196 A1 WO 2017003196A1
Authority
WO
WIPO (PCT)
Prior art keywords
torque
nut
power tool
measured
seating
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.)
Ceased
Application number
PCT/KR2016/006999
Other languages
English (en)
Korean (ko)
Inventor
오성섭
이종진
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.)
Keyang Electric Machinery Co Ltd
Original Assignee
Keyang Electric Machinery Co Ltd
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 Keyang Electric Machinery Co Ltd filed Critical Keyang Electric Machinery Co Ltd
Publication of WO2017003196A1 publication Critical patent/WO2017003196A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/147—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/08—Arrangements for controlling the speed or torque of a single motor

Definitions

  • the present invention relates to a method for controlling a power tool, and more particularly, to a method for controlling a power tool for seating a nut normally in an assembling process of an automobile or the like.
  • the fastening process of the nut is as follows. First, the nut is moved toward the workpiece by rotating along the thread of the bolt by the power tool. However, if the nut meets the workpiece, the rotational speed of the nut is significantly reduced. At this time, it can be seen that the nut is seated.
  • the nut is further subjected to torque for tightening the nut. This is to prevent the nut from loosening. That is, the tightening process of the nut is terminated by finally tightening the nut by providing a target torque determined according to the workpiece.
  • the power tool determines that the nut is normally seated, and then proceeds to control for tightening the nut. In other words, the power tool provides an impact to the nut.
  • An embodiment of the present invention has been made to solve the above problems, and provides a control method of the power tool that can prevent the control to tighten the nut by erroneously determined that the nut is seated before the nut is seated normally. Is in.
  • an object of the present invention is to provide a method for controlling a power tool, which can more accurately determine whether work is poor.
  • a control method that can stably store and manage the work history.
  • an embodiment of the present invention provides a control method of a power tool for seating a nut by providing a torque, the method comprising: detecting a measurement torque applied to the nut using a torque sensor; Comparing the measured torque with a reference torque indicating that the nut is seated; Analyzing the fluctuation of the measured torque when the measured torque exceeds the reference torque and determining one of work failure and seating completion; And initializing a pulse parameter of the power tool if it is determined that the work is defective in the determining step, and if it is determined that the seating is completed in the determining step, pulse torque that provides an impact to the nut. It provides a control method for a power tool comprising a;
  • the determining may include determining whether the measured torque is again reduced below the reference torque.
  • the measuring torque When the measuring torque is detected in the form of providing the impact intermittently at least one or more times in the determining step, and then decreases below the reference torque again, it may be determined as the work failure.
  • the determining may include determining a duration of the measurement torque that exceeds the reference torque.
  • the initializing may change the pulse parameter to a pulse parameter immediately before the measurement torque exceeds the reference torque.
  • the present invention it is possible to accurately determine whether or not work failure through a simple control method can significantly reduce the fastening failure rate of the nut.
  • the subjective judgment of the operator can be excluded in the fastening process, and thus the same fastening quality can be expected.
  • the work history can be stably stored and quality control can be performed using this.
  • FIG. 1 is a flowchart illustrating a control method of a power tool according to an embodiment of the present invention.
  • FIG. 2 is a graph showing a change in measured torque using the power tool of FIG.
  • FIG. 1 is a flowchart illustrating a method of controlling a power tool according to an exemplary embodiment of the present invention
  • FIG. 2 is a graph showing a change in measured torque etq using the power tool of FIG. 1.
  • a control method of a power tool according to an exemplary embodiment of the present disclosure may include detecting (S10), storing (S20), comparing (S30), and determining (S40). And initializing when it is determined that the work is defective (s50a), and generating (s50b) when generating a seating torque.
  • the control method of the present invention can be applied to a power tool that provides torque to seat the nut. At this time, the torque is generated by the rotational force of the motor disposed in the power tool. The torque can also be adjusted by controlling the current supplied to the motor.
  • the seating (a) refers to the moment when the rotational speed of the nut is significantly lowered when the nut meets the workpiece in tightening the nut along the thread of the bolt. That is, the process of fastening the nut is completed only after the subsequent process of tightening the nut is finished after the nut is seated (a).
  • the measurement torque etq starts to increase gradually.
  • a reference torque stq indicating that the nut is seated (a).
  • the measuring torque etq usually exceeds the reference torque stq, it can be determined that the nut is seated (a).
  • the first step of detecting (s10) is a step of detecting the measured torque (etq) actually applied to the nut using a torque sensor.
  • the torque sensor is arranged at the tip of the power tool to accurately detect the measured torque etq actually applied to the nut. At this time, the torque sensor can detect the measurement torque etq continuously or discontinuously. If the normal bolt is used at this stage, the graph of the measured torque (etq) shows little change. However, noise and the like may be further detected through the torque sensor.
  • the storing step (s20) is a step of storing the measurement torque (etq) in the removable memory mounted to the power tool.
  • the removable memory includes a USB (SD), SD (SD) card and the like, is detachably mounted on one side of the power tool.
  • the power tool can transmit the work history to the external control device by wireless communication or the like.
  • the removable memory can reliably store the work history.
  • the comparing step s30 is a step of comparing whether the measured torque etq exceeds the reference torque stq. That is, it is determined whether the measured torque etq is exceeded in real time compared with the reference torque stq.
  • the determining step (s40) is a step of analyzing any variation (change amount) of the measurement torque (etq) when the measurement torque (etq) exceeds the reference torque (stq), and determines whether the operation failure or seating completion. .
  • some of the bolts used for fastening may be a defective product is coated with a coating liquid, paint, and the like on the thread. This provides an additional load on the power tool in the seating process of the nut. As a result, even before the nut is actually seated a, the measurement torque etq may temporarily rise to exceed the reference torque stq.
  • the determining step s40 preferably includes whether the measuring torque etq decreases again below the reference torque stq after exceeding the reference torque stq in order to determine more accurately.
  • the power tool when the measurement torque (etq) exceeds the reference torque (stq), the power tool once determines that the nut is normally seated (a). At the same time, the power tool immediately stops providing torque for seating the nut. As a result, the measurement torque etq rapidly decreases from the predetermined value to zero.
  • the power tool then generates a pulse torque that provides an impact by which the nut can be tightened.
  • the pulse torque refers to the torque that is provided intermittently repeatedly so that the reaction force transmitted to the operator can be minimized.
  • the corresponding measurement torque etq may be detected in the form of providing the impact intermittently at least one or more times.
  • the measurement torque etq may again decrease below the reference torque stq. In other words, if the defective part is confined to a part of the thread of the bolt and the nut passes the part, the measuring torque etq decreases again. Then, it is determined as work failure in the determining step s40.
  • the determining step s40 may include the duration t of the measurement torque etq exceeding the reference torque stq.
  • the torque sensor may detect noise in operation S10.
  • noise should be determined to be normal work regardless of work failure. That is, when the measurement torque etq exceeds the reference torque stq, it is possible to determine whether the noise is more accurate in consideration of whether or not it decreases again below the reference torque stq and its duration t. As a result, the defective rate of the seating (a) process can be significantly reduced and the reliability of the fastening quality can be further improved.
  • the initializing step (s50a) is a step of initializing the pulse parameters of the power tool when it is determined that the work is defective in the determining step. Specifically, all the pulse parameters can be reset to prevent the power tool from recognizing that the nut is normally seated (a) in spite of poor work.
  • the pulse parameter may include a parameter relating to a current driving the motor.
  • the power tool If it is recognized that the nut has been seated properly (a), the power tool immediately begins to provide an impact for tightening the nut, which can lead to a fastening process. Therefore, the power tool is controlled to proceed again to the process for the normal seating (a) of the nut through the initializing step (s50a).
  • the power tool can start a new seat (a) process of the nut.
  • the pulse parameter may be changed to the pulse parameter immediately before the measurement torque etq exceeds the reference torque stq.
  • the seating (a) process of the nut after the initialization can be completed more quickly.
  • the present invention may further comprise reinitializing when judged to be a work failure.
  • the power tool may proceed to the step (s50b) of generating a pulse torque that provides an impact to the nut. That is, when the nut is seated normally (a), the step of tightening the nut may further proceed to finish the fastening process of the nut.
  • the defects occurring in the seating process (a) of the nut can be significantly reduced. At the same time, it is possible to improve the reliability and work productivity of the nut fastening process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

L'invention concerne un procédé de commande pour un outil électrique destiné à poser un écrou en produisant un couple, le procédé comprenant les étapes suivantes : détection d'un couple de mesure appliqué à l'écrou en utilisant un capteur de couple ; comparaison du couple de mesure à un couple standard qui indique que l'écrou est posé ; lorsque le couple de mesure dépasse le couple standard, analyse du changement du couple de mesure et détermination si le couple est lié à un défaut de fonctionnement ou à la fin de l'opération de pose ; si l'étape de détermination amène à déterminer qu'il s'agit d'un défaut de fonctionnement, initialisation d'un paramètre d'impulsion de l'outil électrique ; et si l'étape de détermination amène à déterminer qu'il s'agit de la fin de l'opération de pose, génération d'un couple impulsionnel pour produire un impact sur l'écrou.
PCT/KR2016/006999 2015-07-02 2016-06-30 Procédé de commande pour outil électrique Ceased WO2017003196A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020150094526A KR101633304B1 (ko) 2015-07-02 2015-07-02 전동 공구의 제어 방법
KR10-2015-0094526 2015-07-02

Publications (1)

Publication Number Publication Date
WO2017003196A1 true WO2017003196A1 (fr) 2017-01-05

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PCT/KR2016/006999 Ceased WO2017003196A1 (fr) 2015-07-02 2016-06-30 Procédé de commande pour outil électrique

Country Status (2)

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KR (1) KR101633304B1 (fr)
WO (1) WO2017003196A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4434678A4 (fr) * 2021-11-19 2025-05-21 Panasonic Holdings Corporation Système d'outil électrique, procédé de gestion d'outil électrique et programme

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101811669B1 (ko) * 2016-09-30 2018-01-26 계양전기 주식회사 전동 공구의 제어 방법
KR102291032B1 (ko) * 2019-02-21 2021-08-20 계양전기 주식회사 전동 공구 및 이의 제어 방법

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012139784A (ja) * 2010-12-29 2012-07-26 Hitachi Koki Co Ltd インパクト工具
JP2014124763A (ja) * 2012-12-27 2014-07-07 Hitachi Koki Co Ltd 電動工具
JP2014140931A (ja) * 2013-01-24 2014-08-07 Hitachi Koki Co Ltd 電動工具
KR20140141385A (ko) * 2013-05-31 2014-12-10 주식회사 한국자동화기술 토크인가공구의 검사장치 및 이를 이용한 토크관리시스템
JP2015085471A (ja) * 2013-10-31 2015-05-07 Ｔｏｎｅ株式会社 締付装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101453891B1 (ko) 2013-02-26 2014-11-03 계양전기 주식회사 임팩트 전동공구 및 제어방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012139784A (ja) * 2010-12-29 2012-07-26 Hitachi Koki Co Ltd インパクト工具
JP2014124763A (ja) * 2012-12-27 2014-07-07 Hitachi Koki Co Ltd 電動工具
JP2014140931A (ja) * 2013-01-24 2014-08-07 Hitachi Koki Co Ltd 電動工具
KR20140141385A (ko) * 2013-05-31 2014-12-10 주식회사 한국자동화기술 토크인가공구의 검사장치 및 이를 이용한 토크관리시스템
JP2015085471A (ja) * 2013-10-31 2015-05-07 Ｔｏｎｅ株式会社 締付装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4434678A4 (fr) * 2021-11-19 2025-05-21 Panasonic Holdings Corporation Système d'outil électrique, procédé de gestion d'outil électrique et programme

Also Published As

Publication number Publication date
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