SE9804588D0 - Method of pretensioning a joint containing two or more fasteners - Google Patents
Method of pretensioning a joint containing two or more fastenersInfo
- Publication number
- SE9804588D0 SE9804588D0 SE9804588A SE9804588A SE9804588D0 SE 9804588 D0 SE9804588 D0 SE 9804588D0 SE 9804588 A SE9804588 A SE 9804588A SE 9804588 A SE9804588 A SE 9804588A SE 9804588 D0 SE9804588 D0 SE 9804588D0
- Authority
- SE
- Sweden
- Prior art keywords
- fasteners
- joint
- axial load
- pretensioning
- load level
- Prior art date
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
-
- 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
-
- 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
- B23P19/069—Multi-spindle machines
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
A method for pretensioning a joint to a predetermined clamping load level, which joint is apt to settlement during pretensioning and comprises two or more threaded fasteners (15 a-d) to be tightened by a simultaneous engagement of individually rotated and controlled torque delivering tools (19 a-d), comprising the steps of: I) applying simultaneously a tightening torque on each one of the fasteners (15 a-d), II) measuring during the torque application the instantaneous axial load (F) in each one of the fasteners (15 a-d), III) interrupting the torque application on each one of the fasteners as the axial load (F) on the respective fastener (15 a-d) has reached a predetermined axial load (FT) which corresponds to the intended clamping load level in the joint (10), IV) reapplying a tightening torque one or more times on that fastener or those fasteners (15 a-d) on which the axial load (F) has decreased due to settlement of the joint (10) during one or more relaxation time intervals so as to regain the predetermined axial load level (FT), and V) terminating the pretensioning process of the joint (10) as the axial load (F) has remained substantially unchanged at the predetermined axial load level (FT) for a final time interval in all of the fasteners (15 a-d), thereby providing the intended clamping load level in the joint (10).
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9804588A SE515974C2 (en) | 1998-12-29 | 1998-12-29 | Method of biasing a joint containing two or more threaded fasteners |
PCT/SE1999/002487 WO2000038879A1 (en) | 1998-12-29 | 1999-12-28 | Method for pretensioning a joint containing two or more threaded fasteners |
JP2000590817A JP2002533225A (en) | 1998-12-29 | 1999-12-28 | Tightening method for a coupling with two or more screw-type fasteners |
EP99965696A EP1146993A1 (en) | 1998-12-29 | 1999-12-28 | Method for pretensioning a joint containing two or more threaded fasteners |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9804588A SE515974C2 (en) | 1998-12-29 | 1998-12-29 | Method of biasing a joint containing two or more threaded fasteners |
Publications (3)
Publication Number | Publication Date |
---|---|
SE9804588D0 true SE9804588D0 (en) | 1998-12-29 |
SE9804588L SE9804588L (en) | 2000-06-30 |
SE515974C2 SE515974C2 (en) | 2001-11-05 |
Family
ID=20413899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE9804588A SE515974C2 (en) | 1998-12-29 | 1998-12-29 | Method of biasing a joint containing two or more threaded fasteners |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1146993A1 (en) |
JP (1) | JP2002533225A (en) |
SE (1) | SE515974C2 (en) |
WO (1) | WO2000038879A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111993347A (en) * | 2020-08-21 | 2020-11-27 | 浪潮电子信息产业股份有限公司 | Dismounting jig suitable for multi-fastener synchronous operation |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5163270B2 (en) * | 2008-05-13 | 2013-03-13 | マツダ株式会社 | Bolt fastening method and apparatus |
CN102950460B (en) * | 2012-12-06 | 2014-08-27 | 陈世江 | Synchronous combination process torque device |
CN108044342A (en) * | 2017-12-25 | 2018-05-18 | 上海中船三井造船柴油机有限公司 | For the tight device and method of pump of diesel engine cylinder lid for ship stud |
CN111805218A (en) * | 2020-07-23 | 2020-10-23 | 东阳市俊华电器销售有限公司 | Full-automatic hardware assembly machine |
CN114346631B (en) * | 2022-01-06 | 2023-05-09 | 西安神西电气有限责任公司 | Device for batch loading of base nuts of relay |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2796789A (en) * | 1952-10-20 | 1957-06-25 | Adele M Stevens | Multiple torque transmitting apparatus for tightening threaded fastening elements |
US4273198A (en) * | 1979-07-09 | 1981-06-16 | Daiichi Dentsu Kabushiki Kaisha | Motor-driven clamping method and device |
EP0291215A3 (en) * | 1987-05-11 | 1990-01-10 | Ingersoll-Rand Company | Gasket joint tightening |
US4846001A (en) * | 1987-09-11 | 1989-07-11 | Sps Technologies, Inc. | Ultrasonic load indicating member |
US4969105A (en) * | 1988-05-02 | 1990-11-06 | Ingersoll-Rand Company | Gasket compression control method having tension-related feedback |
US4995145A (en) * | 1990-01-08 | 1991-02-26 | Allen-Bradley Company, Inc. | Reduction of relaxation induced tension scatter in fasteners |
JP2936506B2 (en) * | 1995-07-11 | 1999-08-23 | クワンタイシステムス株式会社 | Optimal time bolt tightening method |
JP4009760B2 (en) * | 1995-11-24 | 2007-11-21 | 忠弘 大見 | Screw member tightening method |
-
1998
- 1998-12-29 SE SE9804588A patent/SE515974C2/en not_active IP Right Cessation
-
1999
- 1999-12-28 JP JP2000590817A patent/JP2002533225A/en active Pending
- 1999-12-28 EP EP99965696A patent/EP1146993A1/en not_active Withdrawn
- 1999-12-28 WO PCT/SE1999/002487 patent/WO2000038879A1/en not_active Application Discontinuation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111993347A (en) * | 2020-08-21 | 2020-11-27 | 浪潮电子信息产业股份有限公司 | Dismounting jig suitable for multi-fastener synchronous operation |
CN111993347B (en) * | 2020-08-21 | 2022-04-22 | 浪潮电子信息产业股份有限公司 | Dismounting jig suitable for multi-fastener synchronous operation |
Also Published As
Publication number | Publication date |
---|---|
EP1146993A1 (en) | 2001-10-24 |
SE515974C2 (en) | 2001-11-05 |
JP2002533225A (en) | 2002-10-08 |
SE9804588L (en) | 2000-06-30 |
WO2000038879A1 (en) | 2000-07-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |