SE8903134L - Method and apparatus foer aatdragning of gaengade foerband - Google Patents

Method and apparatus foer aatdragning of gaengade foerband

Info

Publication number
SE8903134L
SE8903134L SE8903134A SE8903134A SE8903134L SE 8903134 L SE8903134 L SE 8903134L SE 8903134 A SE8903134 A SE 8903134A SE 8903134 A SE8903134 A SE 8903134A SE 8903134 L SE8903134 L SE 8903134L
Authority
SE
Sweden
Prior art keywords
torque
joint
power tool
tightened
method
Prior art date
Application number
SE8903134A
Other languages
Swedish (sv)
Other versions
SE8903134D0 (en
Inventor
G C Hansson
Original Assignee
Atlas Copco Tools 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 Tools Ab filed Critical Atlas Copco Tools Ab
Priority to SE8903134A priority Critical patent/SE8903134L/en
Publication of SE8903134D0 publication Critical patent/SE8903134D0/en
Publication of SE8903134L publication Critical patent/SE8903134L/en
Priority claimed from US07/830,494 external-priority patent/US5245747A/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/147Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14Arrangement of torque limiters or torque indicators in wrenches or screwdrivers

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 foer aatdragning of gaengade foerband SE8903134L (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE8903134A SE8903134L (en) 1989-09-22 1989-09-22 Method and apparatus foer aatdragning of gaengade foerband

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
SE8903134A SE8903134L (en) 1989-09-22 1989-09-22 Method and apparatus foer aatdragning of gaengade foerband
EP19900850316 EP0419435B1 (en) 1989-09-22 1990-09-24 Device for tightening threaded joints
DE1990620994 DE69020994D1 (en) 1989-09-22 1990-09-24 An apparatus for tightening of threaded connections.
DE1990620994 DE69020994T2 (en) 1989-09-22 1990-09-24 An apparatus for tightening of threaded connections.
JP25204690A JP3505175B2 (en) 1989-09-22 1990-09-25 METHOD AND APPARATUS threaded joint tightening
US07/830,494 US5245747A (en) 1989-09-22 1992-02-04 Device for tightening threaded joints

Publications (2)

Publication Number Publication Date
SE8903134D0 SE8903134D0 (en) 1989-09-22
SE8903134L true 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 foer aatdragning of gaengade foerband

Country Status (4)

Country Link
EP (1) EP0419435B1 (en)
JP (1) JP3505175B2 (en)
DE (2) DE69020994D1 (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 pretension level using a manually operated power wrench comprising a nedgängningsfas and a förspänningsfas, sensing the torque resistance in the joint, and interrupting the rotation has reached the desired bias
SE513563C2 (en) * 1998-03-19 2000-10-02 Atlas Copco Tools Ab Method for self-programming of control systems for the power wrench during initial tightening
US7058291B2 (en) 2000-01-07 2006-06-06 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
US6975050B2 (en) 2000-01-07 2005-12-13 Black & Decker Inc. Brushless DC motor
DE10133923B4 (en) * 2001-07-12 2015-10-22 Paul-Heinz Wagner A method for automatically controlling a screwing
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 A method of tightening a threaded connector and Wrench

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 Daiichi Dentsuu Kk 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
EP0419435A3 (en) 1991-12-04
SE8903134D0 (en) 1989-09-22
DE69020994T2 (en) 1996-04-11
EP0419435A2 (en) 1991-03-27
DE69020994D1 (en) 1995-08-24
JPH03184775A (en) 1991-08-12
EP0419435B1 (en) 1995-07-19
JP3505175B2 (en) 2004-03-08

Similar Documents

Publication Publication Date Title
KR840006067A (en) Method sleeve and a steam generating installation for engine repair
KR880010218A (en) Power cycle devices that direct combustion and methods
DE69501427D1 (en) Apparatus / method for creating the driving torque of the engine auxiliary devices and deceleration speed of the moment
JPH01164294A (en) Spindle driving controller for machine tool
KR870011315A (en) Drive signal generator
IT8919921D0 (en) Method and apparatus for joining a projection of an object.
DE69632387D1 (en) Method and apparatus for compensating for torque steer effects
NO317223B1 (en) Tirofiban, optionally in the form of a pharmaceutically acceptable salt, preferably hydrochloride
KR840005189A (en) Fluorination method of the inorganic fluoride in the glow discharge
FI100377B (en) Method and apparatus for energy metabolism threshold values ​​for determining the KSI
IT1282405B1 (en) Method and circuit for controlling power transistors in a half-bridge configuration that compensates for negative swing
DE69231141T2 (en) Synchronous rectification method for reducing the power loss in drive motors in PWM mode
ES532642A0 (en) Apparatus for controlling the operation of a power steering motor
IT1208394B (en) Emulsions concentrated copolymers of ethylene vinylester their method of production and their use
SE514934C2 (en) A plant for generating electric power using wind farm and a method for operating such anlägning.
JPH03184782A (en) Joint structure for leg type walking robot
IT1231374B (en) Method and apparatus for regulating the propulsion of motor vehicles
EP0350725A3 (en) Chuck for tools using axial internal coolant supply
JPS61226363A (en) Electrical power steering device
SE9500611L (en) Device to limit an engine's power output and the way to use this
DE69230356T2 (en) An apparatus for manufacturing semiconductors
IT1152651B (en) Fixing process of a prisoner nut, as well as' prisoner nut and the tool used in the implementation of said process
AT328210T (en) Self-tapping screw, procedures and tools for making the same, and method for joining thin workpieces
DE69410321D1 (en) Device for high power control of a power supply for an induction motor at a variable speed
DE19680963T1 (en) A control apparatus for a PWM-controlled inverter of the voltage umrichtet an AC power source into a DC voltage