CN108367417B - System for pre-tensioning a joint comprising a plurality of threaded elements - Google Patents
System for pre-tensioning a joint comprising a plurality of threaded elements Download PDFInfo
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- CN108367417B CN108367417B CN201680074210.2A CN201680074210A CN108367417B CN 108367417 B CN108367417 B CN 108367417B CN 201680074210 A CN201680074210 A CN 201680074210A CN 108367417 B CN108367417 B CN 108367417B
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- power
- control unit
- wrenches
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- 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
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- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
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Abstract
A system for pretensioning a joint (13) comprising two or more threaded fasteners (11a-c) by simultaneous tightening of the threaded fasteners, the system comprising two or more torque transferring power wrenches (10a-c) and at least one operation control unit (18) communicating with the power wrenches for controlling the operation of each 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 module (16a-c) of the power wrenches for receiving actual operation data from each power wrench and for transferring relevant operation data to each power wrench for adapting the tightening operation of each power wrench to the actual tightening status of the other power wrench or wrenches, thereby obtaining a simultaneous tightening of the fasteners and a uniformly pre-tensioned joint.
Description
Technical Field
The present invention relates to a system for pretensioning a joint (joint) comprising two or more threaded fasteners. In particular, the present invention relates to a system wherein two or more power wrenches are arranged to simultaneously tighten two or more threaded fasteners in a synchronized manner, thereby obtaining an evenly distributed clamping force at the joint.
Background
In systems where two or more power wrenches are arranged to simultaneously tighten two or more threaded fasteners in a synchronized manner, thereby obtaining an evenly distributed clamping force at the joint, it is common to use two or more power wrenches connected via a cable to a common operation control unit, thereby achieving individual control of each power wrench with respect to the operation of the other power wrench or wrenches, thereby obtaining a synchronized tightening of the threaded fasteners and thus an evenly distributed clamping force at the joint. While existing systems work well, there is a continuing desire to improve upon existing systems.
Accordingly, there is a need for an improved system for pretensioning a joint comprising two or more threaded fasteners.
Disclosure of Invention
It is an object of the present invention to provide an improved system for simultaneously and simultaneously tightening two or more threaded fasteners with two or more manually supported power wrenches, whereby the joints are pre-tightened with improved safety and flexibility.
It is a further object of the present invention to provide an improved system for simultaneously and simultaneously tightening threaded fasteners by means of two or more manually supported power wrenches communicating with at least one common operation control unit, thereby pretensioning a joint comprising two or more threaded fasteners, wherein the system is adapted to different applications due to increased flexibility.
At least one of these objects or others may be obtained by the invention defined in the appended claims.
As the inventors have appreciated, existing systems (where two or more power wrenches are connected to a common control unit via cables) are rather inconvenient to use, particularly in applications involving difficult-to-reach locations, where the cables can lead to dangerous and complex operating conditions for the operator or operators, such as when installing cover plates on large containers and boxes and the like. At least some of the defects can be removed or mitigated if the cable is removed.
According to a first aspect of the present invention, a system for pretensioning an engagement member comprising two or more threaded fasteners by simultaneous tightening of the threaded fasteners is provided. The system includes two or more torque transmitting power wrenches and at least one operation control unit in communication with the power wrenches to control operation of each of the power wrenches. Each of the power wrenches may be a manually supported impulse type power wrench. Further, each of the power wrenches may be battery powered and include a wireless communication module. The at least one operation control unit may include a wireless communication module for communicating with the wireless communication module of the power wrench to receive operation data from each power wrench and to transmit data to each power wrench corresponding to the received operation data from the respective power wrench to control a tightening operation of the at least one power wrench. This allows the power wrench to be controlled wirelessly but synchronously.
According to one embodiment, at least one power wrench is controlled to perform a step tightening operation synchronized with a step tightening operation of another power wrench or other plurality of power wrenches of the system.
According to one embodiment, a plurality of power wrenches are arranged in two or more groups to pretension the engagement of multiple fasteners, the power wrenches in each group being controlled to perform simultaneous tightening operations to match the tightening operations of the power wrenches in another group or groups in a synchronized manner.
According to one embodiment, the at least one operation control unit comprises a separate operation control unit provided at or inside each of said power wrenches, each of said separate operation control units being provided in communication with a separate operation control unit or separate operation control units of another power wrench or other power wrenches of the system.
According to one embodiment, the at least one operation control unit comprises a single operation control unit communicating with and controlling all power wrenches in the system.
According to a second aspect of the present invention, a control unit for controlling pretensioning of an engagement member comprising two or more threaded fasteners by simultaneous tightening of the threaded fasteners using two or more torque transmitting power wrenches is provided. A control unit communicates with the power wrench to control operation of at least one of the power wrenches. The operation control unit includes a wireless communication module to communicate with the wireless communication module of the power wrench. The control unit is adapted to receive operation data from each power wrench and to transmit data to each power wrench corresponding to the received operation data from the respective power wrench to control the tightening operation of at least one power wrench.
According to one embodiment, the control unit is adapted to control the at least one power wrench to perform a stepwise tightening operation synchronized with a stepwise tightening operation of at least one other power wrench used in the synchronized tightening of the threaded fastener.
According to one embodiment, when a plurality of power wrenches controlled by the unit are provided with two or more groups to pretension the engagements of multiple fasteners, the control unit is adapted to control the power wrenches in each group to perform simultaneous tightening operations to match the tightening operations of the power wrenches in another group or groups in a synchronized manner.
According to one embodiment, the control unit is a stand-alone device.
According to one embodiment, the control unit is a separate operation control unit provided at or inside the power wrench. The control unit is arranged to communicate wirelessly with at least one other individual operational control unit.
According to a third aspect, a power wrench is provided with a wireless communication module adapted to wirelessly transmit operational data for simultaneous tightening of a threaded fastener by the power wrench and at least one other power wrench.
According to one embodiment, the wireless communication module is adapted to wirelessly communicate the operational data to a common control unit for controlling the synchronized tightening.
According to one embodiment, the wireless communication module is adapted to wirelessly transmit the operational data to the at least one other power wrench.
According to one embodiment, the power wrench comprises a control unit adapted to control the synchronized tightening by the power wrench in response to control data wirelessly received from the at least one other power wrench.
Other objects and advantages of the invention will appear from the following description and from the claims.
Drawings
The invention will now be described in more detail by way of exemplary embodiments and with reference to the accompanying drawings, in which:
FIG. 1 shows the main components of a system for tightening two or more threaded fasteners with two or more manually supported power wrenches;
fig. 2 is a schematic diagram of a control unit.
Detailed Description
In fig. 1, a system 1 for pretensioning a joint 13 comprising two or more threaded fasteners 11a-c by simultaneous tightening of the threaded fasteners is shown. The system shown in fig. 1 comprises three manually supported and battery powered power wrenches 10a-c to be applied on a plurality of threaded fasteners 11 a-c. The threaded fasteners 11a-c are parts of an engaging member 13, wherein two elements 14, 15 are to be combined together by the clamping force obtained by the threaded fasteners 11 a-c. Preferably, the power wrenches 10a-c are of the torque pulse transmitting type, which does not generate any reaction forces, enabling the operator to operate both wrenches simultaneously. The power wrenches 10a-c may also be of the torque transmitting type. Each of the power wrenches 10a-c carries not only a removable battery housing, but also internal means, not shown, for indicating actual operational data, such as output torque, angular displacement, etc. These features are well known in the art and are therefore not described further herein.
Each of the power wrenches 10a-c includes a wireless communication module 16a-c for communicating with a common operation control unit 18. Since it is known per se to provide an operation control unit for a battery powered power wrench equipped with wireless communication, this feature is not explained in more detail.
In fig. 2, the control unit 18 is schematically shown. The control unit 18 comprises a control loop and a comparison loop; the control loop is programmed with operating data adapted to the actual tightening operation, while the control data issued to each power wrench is adapted to the actual operating data received from the other power wrenches by means of the comparison loop. The control loop and the comparison loop may be implemented, for example, by a processor 20 connected to a memory 22, on which memory 22 a computer program is stored which, when executed by the processor, causes the control loop and the comparison loop to carry out the tasks described above. According to one embodiment, the control unit 18 is further arranged to identify the actual state of each of the wrenches during the tightening sequence (sequence) to control the tightening operation of the other power wrench or wrenches in correspondence therewith and to complete the predetermined tightening sequence (sequence) via simultaneous tightening of the threaded fasteners 11 a-c. The control unit 18 is provided with a wireless communication module 24, said wireless communication module 24 being adapted to wirelessly transmit data to the respective power wrench 10a-10c or to wirelessly receive data from the respective power wrench 10a-10 c. The wireless communication module may be operably connected to the control loop. By such simultaneous tightening, an evenly distributed clamping force is obtained at the joint 13, which is particularly important for joints having deformable sealing elements in the form of gaskets or the like (for which it is necessary to avoid uneven arrangement of such elements).
In an alternative embodiment of the invention, the operation control unit may be formed by a separate control unit 18 located at or inside the power wrench itself, which means that the operation data and the identification of the current state of the other power wrench by each of the separate control units 18 are received and compared in a distributed manner. This arrangement contributes to a more flexible system.
The simultaneous tightening of the threaded fasteners 11a-c may well be performed continuously or stepwise, as long as the tightening operation by each of the power wrenches 10a-c is kept in line with the operation of the other power wrenches to achieve an evenly distributed clamping force at the joint 13.
Alternatively, if multiple power wrenches are used to pretension the joints of multiple fasteners, the wrenches may be arranged in groups; thereby enabling simultaneous tightening by controlling simultaneous tightening operations of the power wrenches of one group relative to simultaneous tightening of the power wrenches of the other group or groups. In this case, the purpose of this simultaneous tightening is also to obtain an evenly distributed clamping force at the joint.
By providing a system for simultaneously tightening a plurality of threaded fasteners of a joint by two or more battery-powered power wrenches having wireless communication modules for communicating with at least one operational control unit, a flexible joint pretensioning system can be achieved without cable problems associated with the adaptability and operation of the system.
Claims (16)
1. A system (1) for pretensioning a joint (13) comprising two or more threaded fasteners (11a-c) by simultaneous tightening of the threaded fasteners, the system comprising two or more torque transferring power wrenches (10a-10c) and at least one operation control unit (18), the operation control unit (18) communicating with the power wrenches to control the operation of each of the power wrenches,
the method is characterized in that:
each of the power wrenches is a manually supported power wrench,
each of the power wrenches is battery powered and includes a wireless communication module (16a-c), and
the at least one operation control unit (18) comprises a wireless communication module (24) for communicating with the wireless communication module of the power wrench to receive operation data from each power wrench and to transmit data to each power wrench corresponding to the operation data received from the respective power wrench to control the tightening operation of the at least one power wrench;
the operation control unit (18) comprises a control loop and a comparison loop; the control loop is programmed with operating data adapted to the actual tightening operation, while the control data issued to each power wrench is adapted to the actual operating data received from the other power wrenches by means of the comparison loop.
2. The system of claim 1, wherein at least one of the power wrenches is controlled to perform a step tightening operation synchronized with the step tightening operation of the other power wrench or wrenches of the system.
3. A system according to claim 1 or 2, wherein a plurality of power wrenches are arranged in two or more groups to pretension the engagement of multiple fasteners, the power wrenches in each group being controlled to perform simultaneous tightening operations to match the tightening operations of the power wrenches in another group or groups in a synchronised manner.
4. A system according to claim 1 or 2, wherein the at least one operation control unit comprises a separate operation control unit provided at or inside each of the power wrenches, each of the separate operation control units being provided for communication with a separate operation control unit of another power wrench or other plurality of power wrenches of the system.
5. The system of claim 1 or 2, wherein the at least one operational control unit comprises a single operational control unit that communicates with and controls all power wrenches in the system.
6. The system of claim 1 or 2, wherein each of the power wrenches is a manually supported pulse type power wrench.
7. A control unit (18) for controlling pretensioning of an engagement member (13) comprising two or more threaded fasteners (11a-c) by simultaneous tightening of the threaded fasteners using two or more torque transferring power wrenches (10a-10c), the control unit communicating with the power wrenches for controlling operation of at least one of the power wrenches,
the method is characterized in that:
the control unit (18) comprises a wireless communication module (24) to communicate with the wireless communication module of the power wrench and adapted to receive operation data from each power wrench and to transmit data to each power wrench corresponding to the operation data received from the respective power wrench to control the tightening operation of at least one power wrench;
the control unit (18) comprises a control loop and a comparison loop; the control loop is programmed with operating data adapted to the actual tightening operation, while the control data issued to each power wrench is adapted to the actual operating data received from the other power wrenches by means of the comparison loop.
8. A control unit (18) according to claim 7, wherein the control unit is adapted to control at least one of the power wrenches to perform a stepwise tightening operation synchronized with a stepwise tightening operation of at least one other power wrench used in the synchronized tightening of threaded fasteners.
9. A control unit (18) according to claim 7 or 8, wherein a plurality of power wrenches controlled by the control unit are arranged in two or more groups to pretension the engagement of multiple fasteners, the control unit being adapted to control the power wrenches in each group to perform simultaneous tightening operations to match the tightening operations of the power wrenches in another group or groups in a synchronized manner.
10. The control unit (18) according to claim 7 or 8, wherein the control unit is a separate device.
11. A power wrench (10a-c) comprising a control unit according to any one of claims 7-9, wherein the control unit is arranged to communicate wirelessly with at least one other control unit of at least one other power wrench.
12. The power wrench (10a-c) according to claim 11, wherein the wireless communication module is adapted to wirelessly transmit operational data for simultaneous tightening of threaded fasteners by the power wrench and at least one other power wrench.
13. The power wrench (10a-c) according to claim 12, wherein said wireless communication module is adapted to wirelessly communicate said operational data to a common control unit (18) to control synchronous tightening.
14. The power wrench (10a-c) according to claim 12, wherein said wireless communication module is adapted to wirelessly communicate said operational data to said at least one other power wrench.
15. The power wrench (10a-c) according to claim 14, further comprising a control unit adapted to control the simultaneous tightening by the power wrench in response to control data wirelessly received from said at least one other power wrench.
16. The power wrench (10a-c) according to any one of claims 12-15, wherein each of the power wrenches is a manually supported impulse-type power wrench.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1551660 | 2015-12-16 | ||
| SE1551660-2 | 2015-12-16 | ||
| PCT/EP2016/080804 WO2017102731A1 (en) | 2015-12-16 | 2016-12-13 | A system for pre-tensioning a joint comprising a number of threaded elements |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108367417A CN108367417A (en) | 2018-08-03 |
| CN108367417B true CN108367417B (en) | 2020-09-22 |
Family
ID=57543046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680074210.2A Active CN108367417B (en) | 2015-12-16 | 2016-12-13 | System for pre-tensioning a joint comprising a plurality of threaded elements |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3389929B1 (en) |
| KR (1) | KR102573443B1 (en) |
| CN (1) | CN108367417B (en) |
| WO (1) | WO2017102731A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12017311B2 (en) * | 2016-03-02 | 2024-06-25 | HYTORC Division Unex Corporation | Apparatus for tightening threaded fasteners |
| KR20220081011A (en) * | 2020-12-08 | 2022-06-15 | (주)볼팅마스타 | Torque wrench control system |
| CN115723086A (en) * | 2021-08-30 | 2023-03-03 | 天泽电力(天津)有限公司 | Wrench device and control method thereof |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3965778A (en) * | 1974-09-19 | 1976-06-29 | Standard Pressed Steel Co. | Multi-stage tightening system |
| US4081037A (en) * | 1976-02-02 | 1978-03-28 | Thor Power Tool Company | Control system for a multiple spindle machine |
| KR930006997B1 (en) * | 1990-08-03 | 1993-07-26 | 하재의 | Expansion joint |
| DE20007904U1 (en) * | 2000-05-03 | 2001-09-06 | Cooper Power Tools GmbH & Co., 73463 Westhausen | Screw system |
| CA2494562A1 (en) * | 2002-06-27 | 2004-01-08 | Snap-On Incorporated | Tool apparatus, system and method of use |
| US20050223856A1 (en) * | 2004-04-07 | 2005-10-13 | John Reynertson | Torque wrench with fastener indicator and system and method employing same |
| DE202006014606U1 (en) * | 2006-09-22 | 2007-01-04 | Cooper Power Tools Gmbh & Co. Ohg | Cordless electric tool, especially screwdriver, has transmitter with at least one module adapter reversibly mounted on the tool and a replaceable radio module |
| JP5431006B2 (en) * | 2009-04-16 | 2014-03-05 | Ｔｏｎｅ株式会社 | Wireless data transmission / reception system |
| ES2560208T3 (en) * | 2009-04-22 | 2016-02-17 | Hytorc Div. Unex Corporation | Apparatus for tightening or loosening fasteners |
| US9339926B2 (en) * | 2010-05-03 | 2016-05-17 | Innovation Plus, Llc | System for performing predefined fastener installation procedures |
| DE202011004847U1 (en) * | 2011-04-05 | 2011-06-09 | Apex Brands, Inc. (n.d.Ges.d. Staates Delaware), N.C. | screwdriver system |
| US9467862B2 (en) * | 2011-10-26 | 2016-10-11 | Milwaukee Electric Tool Corporation | Wireless tracking of power tools and related devices |
| JP6322387B2 (en) * | 2013-11-05 | 2018-05-09 | Ｔｏｎｅ株式会社 | Fastening device and fastening method |
-
2016
- 2016-12-13 CN CN201680074210.2A patent/CN108367417B/en active Active
- 2016-12-13 EP EP16809814.3A patent/EP3389929B1/en active Active
- 2016-12-13 KR KR1020187017933A patent/KR102573443B1/en active IP Right Grant
- 2016-12-13 WO PCT/EP2016/080804 patent/WO2017102731A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017102731A1 (en) | 2017-06-22 |
| EP3389929B1 (en) | 2022-11-02 |
| KR102573443B1 (en) | 2023-09-01 |
| EP3389929A1 (en) | 2018-10-24 |
| KR20180094929A (en) | 2018-08-24 |
| CN108367417A (en) | 2018-08-03 |
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