WO2007090258A1 - Method for applying preset torques to threaded fasteners and a power tool therefor - Google Patents
Method for applying preset torques to threaded fasteners and a power tool therefor Download PDFInfo
- Publication number
- WO2007090258A1 WO2007090258A1 PCT/CA2006/001147 CA2006001147W WO2007090258A1 WO 2007090258 A1 WO2007090258 A1 WO 2007090258A1 CA 2006001147 W CA2006001147 W CA 2006001147W WO 2007090258 A1 WO2007090258 A1 WO 2007090258A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- servomotor
- preset
- controlling
- drive controlling
- torque
- 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
Links
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
- 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
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/06—Screw or nut setting or loosening machines
- B23P19/065—Arrangements for torque limiters or torque indicators in screw or nut setting machines
- B23P19/066—Arrangements for torque limiters or torque indicators in screw or nut setting machines by electrical means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The power tool comprises a servomotor, a torque converter and a control assembly that includes a power supply for converting AC to low voltage DC, a drive controller for firstly converting the AC from one phase to three and, secondly, for delivering the latter to the servomotor, a controls apparatus for detecting signals and data to and from the servomotor / torque converter, and also from the drive controller, and a serial communication port for connecting the drive controller to a computer for uploading and downloading data and software/firmware, used for programming, calibrating and retrieving data incorporated in the memory. The current in the servomotor increases gradually until the converter reaches a preset torque that is programmed to correspond to a specific current that is continuously detected and compared to the current supplied to the servomotor.
Claims
Claim 1. A power tool for applying preset torques to threaded fasteners comprising, in combination, a servomotor; a torque converter driven by said servomotor with which it forms a unit; and - means for controlling forming an assembly which basically includes, a power supply subassembly for converting an AC received from a mains power to low voltage DC;
- means for drive controlling, which forms a subassembly, said means for drive controlling being used, firstly, for converting said AC received from said mains power, from one phase to three and, secondly, for delivering the latter to said servomotor;
- a controls apparatus for detecting signals and data to and from: a) said servomotor /said torque converter, and b)said means for drive controlling; and
- a serial communication port used to connect means for controlling to a computer, for uploading and downloading data and software/firmware, namely for programming, calibrating and retrieving stored data incorporated in said memory; said means for drive controlling incorporating - a processor having a memory for a) loading preset torques values for said torque converter, driven by said servomotor, and for
b) feedbacks from attained torques, detected as load currents developed during working processes;
Claim 2. The power tool for applying preset torques to threaded fasteners, as defined in claim 1, wherein said means for controlling further comprises
- a regeneration resistor used to dissipate excess power from an internal DC bus of said means for drive controlling during a deceleration of said servomotor; a main switch for connecting/disconnecting said means power to or from said means for drive controlling; a power ON signal displayed on a light connected to said main switch; a fuse subassembly for overcurrent protection; a membrane keypad control using a system of buttons for setting and changing measurement units shown on
- a display, connected to said power supply subassembly, showing a) a preset torque; b) a measured-achieved in real-time torque; and an elongation of a fastening element, to which the measured-achieved in real- time torque is applied;
- first and second multi-core cables, said first multi-core cable supplying three phase AC power to said servomotor, while said second multi-core cable conveying control signals and data between said servomotor / said torque converter and said means for controlling; and
- a cable for connecting means for controlling to said mains power.
Claim 3. Method for applying preset torques to threaded fasteners, adapted to be carried out by a power tool comprising - a servomotor; a torque converter driven by said servomotor with which it forms a unit; and - means for controlling forming an assembly which basically includes, a power supply subassembly for converting an AC received from a mains power to low voltage DC;
- means for drive controlling, which forms a subassembly, said means for drive controlling being used, firstly, for converting said AC received from said mains power, from one phase to three and, secondly, for delivering the latter to said servomotor;
- a controls apparatus for detecting signals and data to and from said servomotor / said torque converter, the former and latter constituting a unit, and from means for drive controlling; and
- a serial communication port used to connect means for controlling to a computer, for uploading and downloading data and software/firmware, namely for programming, calibrating and retrieving stored data incorporated in said memory; said means for drive controlling incorporating
- a processor having a memory for a) loading preset torques values for said torque converter, driven by said servomotor, and for b) feedbacks from attained torques, detected as load currents developed during working processes;
said method for applying preset torques to threaded fasteners including
- actuating said power tool by an operator to set a HIGH logical level at a digital input port of said means for drive controlling;
- detecting said HIGH logic level by said means for drive controlling, so that said servomotor is, enabled due to a software, programmed to take in consideration the following situations and, consequently, to direct appropriate actions:
- continuously measuring a current supplied to said servomotor by said means for drive controlling;
- increasing gradually the current supplied to said servomotor until said torque converter reaches a preset torque, the latter being programmed to correspond to a specific current that is continuously detected and compared to the current supplied to said servomotor;
- using the programmed software, when the current supplied to said servomotor equals the current corresponding to a preset torque, to direct the following operations:
- changing a first digital output level to HIGH on a specified output and signalizing that the preset torque is reached;
- temporarily stopping said servomotor by software programming; and then
- reversing the rotation direction of said servomotor so, as to obtain a limited counter clock movement, intended to ease a release of said power tool from one of said threaded fasteners.
Claim 4, as defined in claim 3, further comprising
performing a calibration of said power tool for establishing preset torques (targeted moments of rotation), said calibration comprising
- continuously detecting the currents supplied to said servomotor up to values corresponding to said preset torques, which are established by the user in order to execute required tightenings, when, by appropriately stopping said servomotor, the latter is prevented to exceed a preset torque, and in some instances, if a rotation of said servomotor ends before a preset torque is attained, there is failure, which is instantly signalized to the operator of said power tool; the data resulted from this operation being represented graphically or in a table form and then entered into an external computer C; and
- transferring said data from said external computer C to said memory by using a calibration software.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP06761109.5A EP1984148B2 (en) | 2006-02-06 | 2006-07-12 | Method for applying preset torques to threaded fasteners and a power tool therefor |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2535299A CA2535299C (en) | 2006-02-06 | 2006-02-06 | Method for applying preset torques to threaded fasteners and a power tool therefor |
| CA2,535,299 | 2006-02-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007090258A1 true WO2007090258A1 (en) | 2007-08-16 |
Family
ID=36283172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CA2006/001147 Ceased WO2007090258A1 (en) | 2006-02-06 | 2006-07-12 | Method for applying preset torques to threaded fasteners and a power tool therefor |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1984148B2 (en) |
| CA (1) | CA2535299C (en) |
| WO (1) | WO2007090258A1 (en) |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2149431A1 (en) * | 2008-07-31 | 2010-02-03 | Alexander Kipfelsberger | Screw device with torque limitation |
| US9055033B2 (en) | 2012-07-17 | 2015-06-09 | Milwaukee Electric Tool Corporation | Universal protocol for power tools |
| US9756402B2 (en) | 2015-05-04 | 2017-09-05 | Milwaukee Electric Tool Corporation | Power tool and method for wireless communication |
| US9900967B2 (en) | 2015-10-30 | 2018-02-20 | Milwaukee Electric Tool Corporation | Remote light control, configuration, and monitoring |
| US10131042B2 (en) | 2013-10-21 | 2018-11-20 | Milwaukee Electric Tool Corporation | Adapter for power tool devices |
| US10149142B2 (en) | 2016-06-06 | 2018-12-04 | Milwaukee Electric Tool Corporation | System and method for establishing a wireless connection between power tool and mobile device |
| US10272550B2 (en) | 2016-02-25 | 2019-04-30 | Milwaukee Electric Tool Corporation | Power tool including an output position sensor |
| US10295990B2 (en) | 2015-05-18 | 2019-05-21 | Milwaukee Electric Tool Corporation | User interface for tool configuration and data capture |
| US10339496B2 (en) | 2015-06-15 | 2019-07-02 | Milwaukee Electric Tool Corporation | Power tool communication system |
| US10345797B2 (en) | 2015-09-18 | 2019-07-09 | Milwaukee Electric Tool Corporation | Power tool operation recording and playback |
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Families Citing this family (1)
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|---|---|---|---|---|
| CN105345718B (en) * | 2014-04-03 | 2017-03-15 | 胡井湖 | A kind of intelligent electric torque wrench |
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|---|---|---|---|---|
| US6390205B2 (en) * | 1998-12-10 | 2002-05-21 | Atlas Copco Tools Ab | Power tool system with programmable control unit |
| US6516896B1 (en) * | 2001-07-30 | 2003-02-11 | The Stanley Works | Torque-applying tool and control therefor |
| US6804929B2 (en) * | 2001-06-13 | 2004-10-19 | Tadeusz Kemnitz | Rotary capping apparatus and feedback control system for regulating applied torque |
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| SE8903134L (en) * | 1989-09-22 | 1991-03-23 | Atlas Copco Tools Ab | METHOD AND APPARATUS FOR TENSION OF THROUGH TAPES |
| US5713250A (en) † | 1996-09-26 | 1998-02-03 | The Boeing Company | Automatic fastening tool and method therefor |
| US5903462A (en) † | 1996-10-17 | 1999-05-11 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Computer implemented method, and apparatus for controlling a hand-held tool |
| US6536536B1 (en) † | 1999-04-29 | 2003-03-25 | Stephen F. Gass | Power tools |
| US6430463B1 (en) * | 2000-02-29 | 2002-08-06 | O.E. Electronics, Inc. | Torque control |
| US6981311B2 (en) † | 2003-03-06 | 2006-01-03 | Ingersoll-Rand Company | Fastening apparatus and method |
| DE10341975A1 (en) † | 2003-09-11 | 2005-04-21 | Bosch Gmbh Robert | Torque limiting device for an electric motor |
-
2006
- 2006-02-06 CA CA2535299A patent/CA2535299C/en not_active Expired - Lifetime
- 2006-07-12 WO PCT/CA2006/001147 patent/WO2007090258A1/en not_active Ceased
- 2006-07-12 EP EP06761109.5A patent/EP1984148B2/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6390205B2 (en) * | 1998-12-10 | 2002-05-21 | Atlas Copco Tools Ab | Power tool system with programmable control unit |
| US6804929B2 (en) * | 2001-06-13 | 2004-10-19 | Tadeusz Kemnitz | Rotary capping apparatus and feedback control system for regulating applied torque |
| US6516896B1 (en) * | 2001-07-30 | 2003-02-11 | The Stanley Works | Torque-applying tool and control therefor |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP1984148A4 * |
Cited By (83)
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|---|---|---|---|---|
| EP2149431A1 (en) * | 2008-07-31 | 2010-02-03 | Alexander Kipfelsberger | Screw device with torque limitation |
| US11874766B2 (en) | 2012-07-17 | 2024-01-16 | Milwaukee Electric Tool Corporation | Universal protocol for power tools |
| US9055033B2 (en) | 2012-07-17 | 2015-06-09 | Milwaukee Electric Tool Corporation | Universal protocol for power tools |
| US9710373B2 (en) | 2012-07-17 | 2017-07-18 | Milwaukee Electric Tool Corporation | Universal protocol for power tools |
| US11409647B2 (en) | 2012-07-17 | 2022-08-09 | Milwaukee Electric Tool Corporation | Universal protocol for power tools |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP1984148A4 (en) | 2010-09-01 |
| EP1984148A1 (en) | 2008-10-29 |
| CA2535299A1 (en) | 2006-05-03 |
| EP1984148B1 (en) | 2013-08-28 |
| EP1984148B2 (en) | 2019-09-04 |
| CA2535299C (en) | 2014-07-22 |
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