SE8903134D0 - METHOD AND DEVICE FOR TIGHTENING THREADED JOINTS - Google Patents

METHOD AND DEVICE FOR TIGHTENING THREADED JOINTS

Info

Publication number
SE8903134D0
SE8903134D0 SE8903134A SE8903134A SE8903134D0 SE 8903134 D0 SE8903134 D0 SE 8903134D0 SE 8903134 A SE8903134 A SE 8903134A SE 8903134 A SE8903134 A SE 8903134A SE 8903134 D0 SE8903134 D0 SE 8903134D0
Authority
SE
Sweden
Prior art keywords
torque
joint
tightened
power tool
threaded joints
Prior art date
Application number
SE8903134A
Other languages
Swedish (sv)
Other versions
SE8903134L (en
Inventor
G C Hansson
Original Assignee
Atlas Copco Ab
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 Atlas Copco Ab filed Critical Atlas Copco Ab
Priority to SE8903134A priority Critical patent/SE8903134L/en
Publication of SE8903134D0 publication Critical patent/SE8903134D0/en
Priority to DE1990620994 priority patent/DE69020994T2/en
Priority to EP19900850316 priority patent/EP0419435B1/en
Priority to JP25204690A priority patent/JP3505175B2/en
Publication of SE8903134L publication Critical patent/SE8903134L/en
Priority to US07/830,494 priority patent/US5245747A/en

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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

The invention concerns a method and a device for tightening threaded joints in two subsequent steps, namely a first step during which a joint is tightened to a predetermined torque snug level and a second step during which the joint is further tightened up to a final predetermined pretension level. During the second tightening step the torque delivered by the power tool (10) comprised in the device is gradually increased at a rate exceeding the highest torque rate expected from the joint to be tightened. The power tool (10) comprises an electric brushless AC-motor which is supplied with power from a variable frequency output inverter (11), and the gradual increase in output torque from the power tool (10) is accomplished by the phase lag in the AC-motor as a result of a gradually increased output frequency from the power supply means (11).
SE8903134A 1989-09-22 1989-09-22 METHOD AND APPARATUS FOR TENSION OF THROUGH TAPES SE8903134L (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
SE8903134A SE8903134L (en) 1989-09-22 1989-09-22 METHOD AND APPARATUS FOR TENSION OF THROUGH TAPES
DE1990620994 DE69020994T2 (en) 1989-09-22 1990-09-24 Device for tightening threaded connections.
EP19900850316 EP0419435B1 (en) 1989-09-22 1990-09-24 Device for tightening threaded joints
JP25204690A JP3505175B2 (en) 1989-09-22 1990-09-25 Screw joint tightening method and device
US07/830,494 US5245747A (en) 1989-09-22 1992-02-04 Device for tightening threaded joints

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8903134A SE8903134L (en) 1989-09-22 1989-09-22 METHOD AND APPARATUS FOR TENSION OF THROUGH TAPES

Publications (2)

Publication Number Publication Date
SE8903134D0 true SE8903134D0 (en) 1989-09-22
SE8903134L SE8903134L (en) 1991-03-23

Family

ID=20376960

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8903134A SE8903134L (en) 1989-09-22 1989-09-22 METHOD AND APPARATUS FOR TENSION OF THROUGH TAPES

Country Status (4)

Country Link
EP (1) EP0419435B1 (en)
JP (1) JP3505175B2 (en)
DE (1) DE69020994T2 (en)
SE (1) SE8903134L (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE506118C2 (en) * 1993-09-02 1997-11-10 Atlas Copco Tools Ab Method for tightening threaded joints to a desired bias level by means of a manually operated force nut puller comprising a downward phase and a biasing phase, sensing the torque resistance in the joint and interrupting rotation at the desired bias level reached
SE513563C2 (en) * 1998-03-19 2000-10-02 Atlas Copco Tools Ab Method for self-programming control systems for power nuts during initial tightening procedures
US6975050B2 (en) 2000-01-07 2005-12-13 Black & Decker Inc. Brushless DC motor
US6538403B2 (en) 2000-01-07 2003-03-25 Black & Decker Inc. Brushless DC motor sensor control system and method
US7058291B2 (en) 2000-01-07 2006-06-06 Black & Decker Inc. Brushless DC motor
DE10133923B4 (en) * 2001-07-12 2015-10-22 Paul-Heinz Wagner Method for automatically controlling a screwing operation
CA2535299C (en) * 2006-02-06 2014-07-22 Dan Provost Method for applying preset torques to threaded fasteners and a power tool therefor
DE102006017193A1 (en) 2006-04-12 2007-10-25 Robert Bosch Gmbh Method for tightening a screw connection and screwing tool

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5969271A (en) * 1982-10-13 1984-04-19 第一電通株式会社 Screw clamping device using induction motor
NZ214090A (en) * 1985-11-06 1989-01-27 Sps Technologies Pulse width control of ac induction motor

Also Published As

Publication number Publication date
DE69020994T2 (en) 1996-04-11
JPH03184775A (en) 1991-08-12
DE69020994D1 (en) 1995-08-24
EP0419435A2 (en) 1991-03-27
SE8903134L (en) 1991-03-23
JP3505175B2 (en) 2004-03-08
EP0419435A3 (en) 1991-12-04
EP0419435B1 (en) 1995-07-19

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Legal Events

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Effective date: 19940503