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A system for pre-tensioning a joint comprising a number of threaded elements

A technology of joints, threaded fasteners, applied in the direction of screwdrivers, wrenches, manufacturing tools, etc.

Active Publication Date: 2018-08-03
ATLAS COPCO INDAL TECHN AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the existing system works well, there is a constant desire to improve the existing system

Method used

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  • A system for pre-tensioning a joint comprising a number of threaded elements
  • A system for pre-tensioning a joint comprising a number of threaded elements

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Embodiment Construction

[0026] exist figure 1 , a system 1 for pre-tensioning a joint 13 comprising two or more threaded fasteners 11a-c by synchronous tightening of the threaded fasteners is shown. exist figure 1 The system shown in includes three manually supported and battery powered power wrenches 10a-c to be applied on a plurality of threaded fasteners 11a-c. The threaded fasteners 11a-c are part of the joint 13 in which the two elements 14, 15 are to be brought together by the clamping force obtained by the threaded fasteners 11a-c. Preferably, the power wrenches 10a-c are of the torque pulse transmission type, which does not generate any reaction force, enabling the operator to operate two wrenches simultaneously. But the power wrenches 10a-c could also be of the torque transmitting type. Each of the power wrenches 10a-c carries not only a removable battery housing, but also internal devices, not shown, for indicating actual operating data such as output torque, angular displacement, and th...

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Abstract

A system for pre-tensioning a joint (13) including two or more threaded fasteners (11a-c) by a synchronized tightening of the threaded fasteners. The system comprises two or more torque delivering power wrenches (10a-c) and at least one operation control unit (18) communicating with the power wrenches for control of the operation of each one of the power wrenches, wherein the power wrenches are manually supported battery powered power wrenches each having a wireless communication module, and the operation control unit comprises a wireless communication module (24) for communicating with the wireless communication modules (16a-c) of the power wrenches to thereby receive actual operation data from each power wrench and to deliver relevant operation data to each power wenches to adapt the tightening operation of each power wrench to the actual tightening status of the other power wrench or wrenches to achieve synchronous tightening of the fasteners and even pre-tensioning of the joint.

Description

technical field [0001] The present invention relates to a system for pretensioning a joint comprising two or more threaded fasteners. In particular, the present invention relates to a system in which two or more power wrenches are configured to simultaneously tighten two or more threaded fasteners in a synchronized manner to obtain an evenly distributed clamping force at the joint . Background technique [0002] In systems where two or more power wrenches are set to simultaneously tighten two or more threaded fasteners in a synchronized Two or more power wrenches connected by cable to a common operation control unit, so as to achieve individual control of each power wrench relative to the operation of other power wrenches or multiple power wrenches, thereby obtaining synchronous tightening of threaded fasteners And thus an evenly distributed clamping force is obtained at the joint. While existing systems work well, there is a constant desire to improve existing systems. ...

Claims

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Application Information

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IPC IPC(8): B25B23/147
CPCB25B23/147
Inventor H·N·奥贝里
Owner ATLAS COPCO INDAL TECHN AB
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