CN1235570A - Method for producing screw connections - Google Patents
Method for producing screw connections Download PDFInfo
- Publication number
- CN1235570A CN1235570A CN 97199364 CN97199364A CN1235570A CN 1235570 A CN1235570 A CN 1235570A CN 97199364 CN97199364 CN 97199364 CN 97199364 A CN97199364 A CN 97199364A CN 1235570 A CN1235570 A CN 1235570A
- Authority
- CN
- China
- Prior art keywords
- acoustic emission
- bolt
- rundown process
- time
- predetermined
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 238000000034 method Methods 0.000 claims abstract description 61
- 230000008569 process Effects 0.000 claims abstract description 20
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000011156 evaluation Methods 0.000 claims description 2
- 238000009776 industrial production Methods 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 17
- 230000008901 benefit Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Images
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
- B25B23/142—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers
- B25B23/1422—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters
- B25B23/1425—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters 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
- B23P19/065—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
- 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
Abstract
The invention concerns a method of producing specific screw connections, two components being urged against each other with predetermined pretension by means of a screw which is rotated by a screwing device which can be regulated, and the screw producing an acoustic emission. The invention is characterized by the following steps: detection of the acoustic emission which is generated in the screw during an actual screwing process; and comparison of the detected acoustic emission occurring during the actual screwing process with predetermined stored data, it being determined according to predetermined criteria whether the screwing process is proceeding correctly. The method can preferably be used in assembly processes in industrial production.
Description
The present invention relevant a kind of be used for making method that is threaded and the assembling process that can be advantageously used in industrial production.
Knownly from existing technology in industrial production, often use automatically controlled spiral system.These spiral systems have the tool spindle of a drive unit and a band spiral tool, and this spiral tool is tightened with a predetermined moment in spin, so that interconnective parts are compressed mutually with certain prestressing force.This power is called prestressing force and changes institute by the length of shank of bolt and produced, and this length change is called elongation hereinafter.Under many applicable cases, all be necessary this prestressing force accurately is adjusted to a predetermined value as far as possible.Require to determine prestressing force for this reason.Existing technology is determined prestressing force indirectly by measure moment in spin when twisting bolt.Mainly adopt torque or outer corner measurement system for measuring this moment in spin, these systems are integrated in the spiral system.When screwing bolt, reaching the torque of a preset, then be used to cut off drive unit by a given signal of torque or outer corner measurement system, perhaps bolt is further tightened a predetermined corner.
Following problems can occur when coming indirect determination prestressing force with torque measurement system: in the time of tightening a bolt, the only a fraction of torque that produces is used to the elongation of bolt that is is used to produce prestressing force.The torque of the overwhelming majority be absorbed on the bolt thread by friction and bolt head on.If friction condition changes, then this variation can have influence on prestressing force consumingly.Therefore aforesaid device just can not guarantee to follow strict prestressing force tolerance.
For overcoming these difficulties, then require directly to measure prestressing force.Diverse ways and device have been advised for this reason.The known measurement ring that has under bolt head configuration one to be shaped as pad.This measurement ring is a sensor, and it provides a signal of telecommunication in the masterpiece time spent.Be tightened as bolt,, just can directly measure prestressing force thus just bolt head is pressed on this measurement ring.This method is spent very much, is retained under the bolt head after threaded together connects because measure ring.Therefore this method only is confined to particular application, for example space flight or nuclear energy technology etc.
Another determines that prestressed method is carried out description in patent documentation DE4410722.Wherein disclosed the prestressed device that a kind of coil with at least one alternating current of flowing through is determined at the bolt in the member, wherein this bolt is made up of the surface towards coil that conductive material is formed at least in part, and one is proportional to bolt prestressing force and the distance at least one coil that changes is obtained as measuring-signal by this coil, and wherein bolt head has an outstanding scope towards member.
The shortcoming of this method is: it can only be used to the bolt that conductive material is formed.Then can not be acquired by the length variations that plastic deformation produced.Because length to be measured is very little, so this method almost can not be used under the coarse working condition or only just may be utilized under the very high technology cost condition of cost.
A kind of set bolt has been described in patent documentation DE4017726, it has one to a threaded bar of small part and a manipulatable end, on this manipulatable end, be provided with one, a pin spare or analog, wherein provide one second end face on the free end at axle providing one first end face on the manipulatable end of set bolt, and in these both ends of the surface, provide the measurement face that ultrasonic measurement is used, these measurement faces only extend on a part of end face and with respect to end face by axial dipole field be configured to have the form of a protuberance and/or depression.
Can measure bolt length by ultrasonic wave with this device changes.Material parameter and physical dimension with bolt can directly be measured prestressing force by the method that the professional knows.The theme of patent application DE19507391 and DE4025430 also is based on principle same as described above.
Determine that with ultrasonic wave the change of bolt length also has its shortcoming.Change information for accurately obtaining length, ultrasonic wave should be imported in the bolt definitely.And technical problem to be solved thus is very many.Therefore require ultrasonic wave is imported in addition particular design of face and reflecting surface.In addition, also require these faces with high accuracy processing and have the very narrow margin of tolerance.Standard bolt can not satisfy these requirements.Bolt is to adopt high efficiency method to come batch machining.The bolt that processing is had ultrasonic wave importing face is then available without any the method that can add comparison.Therefore just very high to the processing charges of these special bolts.Another shortcoming is: ultrasonic wave imports and the reception of reaction signal must directly be carried out on bolt when adopting ultrasonic method, that is ultrasonic transmitter and receiver be integrated on the shank of bolt, and this shank of bolt produces very big structural change thus.In the very narrow occasion of structure proportion, perhaps this shank of bolt that has than the macrostructure size can not be used.
Task of the present invention provides a kind of prestressed method on directly determining to be threaded, and this method can overcome aforesaid problem.
This task solves by the described method of claim 1, wherein adopts a bolt that is rotated by an adjustable device for screwing up that two members are pressed together mutually with a predetermined prestressing force.Cause from bolt material, producing an acoustic emission by the elongation of bolt.The method is characterized in that following step:
-obtain acoustic emission, this acoustic emission appears on the bolt at that time a rundown process, and
-the acoustic emission that will obtain in this rundown process is at that time made comparisons with predetermined, stored data, wherein judges according to predetermined criteria whether rundown process normally carries out.
Evaluation to acoustic emission signal is to carry out with the acoustic emission analysis method of knowing in the prior art.
The advantage of this method is: can obtain one with the narrow relevant signal of prestressing force, in this signal and the screw thread or the friction on the bolt head irrelevant and can be used to control selectively or regulate rundown process.Can with in the sort signal of acoustic emission and the prior art known measured as torque, corner, bolt length, yield point, be screwed into degree of depth etc. measuring-signal combined.These combinations are applied to these and are threaded, and keep predetermined qualitative character to have strict especially tolerance in these are threaded.As required also can be with plural measured combining.This method is that another also is that substantial advantage is: acoustic emission also can be acquired in the nearer environment of distance bolt.So just at first can utilize a kind of being used in one is threaded directly to determine the prestressed method of a bolt, extraction measured in this method might not be carried out on bolt.
According to the theme that is further development of dependent claims with advantage of this method of the present invention, item obtain in rundown process at that time at that time an acoustic emission sample that produces when the bolt elongate according to claim 2 thus.Meanwhile this at that time sample and the feature sample of a pre-stored make comparisons, wherein adopt predetermined criteria to judge that whether rundown process carry out in the margin of tolerance that allows.
Item according to bolt geometry, bolt size and structure proportion, that is, on bolt, select a suitable environment according to claim 3, on this environment, detect acoustic emission well according to the environment of bolt.A suitable position is preferably the end face of bolt head or the end face of side or bolt tail.Also can select other position according to concrete structure proportion, this position wants to be provided at the sensor of reception acoustic emission and the direct contact between the bolt.
Item according to the bolt geometry, bolt size and select a suitable position according to the structure proportion in the bolt direct environment detects acoustic emission well on this position according to claim 4.When selecting suitable position, to consider the ultrasonic wave transitive relation.The position of one optimum can obtain by less test.
Item both can be directly on the correct position on the bolt, in also can direct environment, obtain acoustic emission according to claim 5 at bolt.This method provides a kind of higher conclusion reliability of estimating acoustic emission when specific (special) requirements and under special ratio condition.
Be threaded except adopting acoustic emission also to monitor controlling or regulating according to claim 6 item, wherein have three kinds of preferable methods schemes: scheme 1 by corner or by yield point or bolt length:
When being threaded, manufacturing one determines the degree of depth that is screwed into of bolt continuously with a depth transducer.When bolt head arrived supporting, the signal of depth transducer surpassed a predetermined limit value T and to the beginning of obtaining of acoustic emission.After arriving a preestablished limit value E1, then begin outer corner measurement.When acoustic emission arrived another predetermined value E2, the shank of bolt that is used to screw in bolt was cut off.And then check corner whether to be positioned at a scope given in advance.When corner was positioned at this scope given in advance, being threaded was judged as, and in the time of outside corner is positioned at scope given in advance, being threaded, it is bad to be evaluated as.Scheme 2:
Determine torque on the bolt continuously with a torque sensor when being threaded making one.When bolt head put in place, the signal of torque sensor surpassed a preestablished limit value M and to the beginning of obtaining of acoustic emission.After arriving a preestablished limit value E1, then begin an outer corner measurement.Calculate the relation of two amounts from resulting torque and corner.When acoustic emission arrives another preestablished limit value E2, shank of bolt be cut off and at this moment check torque/corner proportionate relationship with and/or corner and/or torque whether be positioned within the predetermined scope.Scheme 3:
Come to measure its length L 1 at the screw-in bolt.Then when being screwed into the degree of depth, measurement bolt is screwed onto till the supporting of bolt head with a depthmeter and measurement torque.The measuring-signal of depthmeter arrives a limiting value T when reaching the bolt head bearing-surface, after this then begins the collection to acoustic emission.When acoustic emission arrives a predetermined value E1, then begin outer corner measurement.When acoustic emission arrived another predetermined value E2, shank of bolt was cut off and begins to measure the long L2 of bolt.Then calculate prestressing force from length difference L2-L1 through the machined parameters of known physical dimension and bolt.
Control the manufacturing that is threaded according to claim 7 item through torque or corner or yield point, wherein then monitor through acoustic emission.
Three kinds of preferable methods schemes are arranged: scheme 1:
When measuring torque bolt being threaded into bolt head supports.Torque arrives a predetermined value M1 when bolt bearing, begins obtaining acoustic emission after this.When torque arrived a predetermined value M2, shank of bolt was cut off.Check acoustic emission whether to be positioned within the preset range afterwards or do not satisfy the predetermined criteria condition.Can under the condition that is not subjected to screw thread and bolt head friction institute interference effect, check the length of bolt thus.Scheme 2:
When measuring torque bolt being threaded into bolt head supports.Torque arrives a predetermined value M1 when bolt head supports, and then begins obtaining acoustic emission and corner thereafter.Shank of bolt is cut off when arriving a predetermined value D1.Whether it checked acoustic emission to be positioned within the preset range afterwards or satisfied the predetermined criteria condition.Can judge especially with this method whether bolt is not screwed in the scope of plastic deformation or has been entered in this scope too deeply.Scheme 3:
When measuring torque bolt being threaded into bolt head supports.Torque severe increase and arrive a predetermined value M1 after bolt head supporting.Determine torque/corner proportionate relationship constantly and begin to measure acoustic emission at this.After reaching, one of torque/corner predetermined proportionate relationship then cuts off shank of bolt.Then check acoustic emission whether to be positioned within the preset range afterwards or do not satisfy the predetermined criteria condition.
Then adopted the method that is used for redundant monitoring rundown process according to of the present invention according to Claim 8.This method can combine with known method in the prior art.A kind of such combining form can be such as being described as follows in addition.
When measuring torque, screw in a bolt with one " mode of operation fast ".When arriving a threshold value torque M 1, when torque M 1 sign and guarantee to arrive the supporting of bolt head, then connect one " slowly mode of operation " and insert a corner monitoring function at the same time.Carry out this moment to slowly being further rotated of bolt, till arriving a technical predetermined cut-out moment M2.After cutting off, can judge whether tested corner is tightened bolt according to technical data with a predetermined corner is consistent and such from the corner value between M1 and the M2.Adopt the method according to this invention to carry out the control of a kind of redundant monitoring corner, wherein be used for determining by a feature sample of the given acoustic emission of bolt whether be stored in memory in a comparative sample consistent.This Redundant Control has improved reliability of statistics, can judge the quality quality that is threaded with respect to the thrust direction with this reliability of statistics.This method can be preferably used for having in being threaded of tight tolerance.Another advantage is: this redundancy monitoring can be configured on the device for screwing up of composition afterwards.
Other measure and advantage of the present invention can be understood to the description of embodiment and in conjunction with accompanying schematic figure from following, wherein The present invention be directed to the combination of all new features that produced thus or feature, even can not be explicitly recited in the claim when these features or feature combination.
Fig. 1 illustrates the schematic construction of a preferred embodiment of the method according to this invention.
Have two plate type members to be screwed in together by the bolt with a M10, wherein one has a screwed hole.To carry out the following course of work for this reason.
Bolt is used and is screwed into member, wherein is screwed into the degree of depth with the depthmeter measurement simultaneously.When the supporting on the bolt head arrival member, depth transducer provides a signal, and this signal begins the measurement to acoustic emission (AE).Gather the high frequency acoustic emission signal that produces the bolt from a calibrate AE sensor that removably is connected on the bolt, these signals are arranged in 130～300KHZ scope in this example.Acoustic emission signal is processed into a quasi-static signal.At first carry out a bandpass filtering for this reason, be used for SNR is improved.Bandpass filter designs like this: make friction process in the screw thread is produced or separate with the useful signal that electric bolt elongate is produced by the interference sound source that other sound source produces.And then average with this signal square and to it.The width of this average and frequency range and position are depended on bolt or bolt type and can be determined through testing.When having the empirical value that is used for a definite bolt type, the then final if possible optimization that requires this value.For improving measures signal quality, can adopt other bandpass filter.If the quasi-static signal through filtering of acoustic emission surpasses a predetermined limit value E1, then begin measurement to corner.When arriving another limiting value E2, then cut off shank of bolt.After disconnecting shank of bolt, then check the corner that on bolt head, measures whether to be positioned at the margin of tolerance that engineering allows.
It must be emphasized that: this embodiment does not represent any limitation of the invention, adopts disclosed technological know-how in the specification of the present invention, and the professional can develop other application possibility of the present invention, but does not leave the protection domain of claim of the present invention.
Claims (8)
1. one kind is used to make definite threaded connection method, wherein adopt and to regulate the bolt that device for screwing up screws by one two members are pressed together mutually with a predetermined prestressing force, wherein this bolt provides an acoustic emission, it is characterized in that, this method may further comprise the steps:
-obtain acoustic emission, this acoustic emission results from the bolt in rundown process at that time,
-will be somebody's turn to do the acoustic emission that in rundown process at that time, produces and be acquired to make comparisons, wherein with data predetermined, that stored
-judge according to predetermined criteria whether rundown process normally carries out.
2. the method for claim 1 is characterized in that, it is further comprising the steps of:
-obtaining at that time a sample of acoustic emission, this sample produces during in bolt elongate at that time a rundown process;
-the sample at that time and a feature samples of being stored that will be somebody's turn to do the acoustic emission that is produced in rundown process at that time made comparisons, and wherein adopts predetermined criteria to judge whether this rundown process carries out within the margin of tolerance that allows.
3. method as claimed in claim 1 or 2, it is characterized in that: acoustic emission signal directly is acquired on bolt, wherein the position that obtains acoustic emission is selected like this, makes acoustic emission can have a valuable quality
4. method as claimed in claim 1 or 2 is characterized in that: acoustic emission signal is obtained from the direct environment of bolt, wherein the position that obtains acoustic emission is selected like this, makes acoustic emission have a valuable quality.
5. method as claimed in claim 1 or 2, it is characterized in that: acoustic emission signal is directly obtained on bolt and acoustic emission signal is also obtained from the direct environment of bolt simultaneously, wherein the position that obtains acoustic emission is selected like this, made acoustic emission can have a valuable quality.
6. as the described method of claim 1～5, it is characterized in that:, also monitor and be threaded by corner or yield point or bolt length except adopting acoustic emission does control and regulate.
7. as the described method of claim 1～5, it is characterized in that: the manufacturing that is threaded by
-to the evaluation of acoustic emission monitor and by
-torque or corner or yield point are controlled.
8. as the described method of claim 1～7, it is characterized in that: the acoustic emission that produces in rundown process is used to redundant monitoring.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19643933.7 | 1996-10-30 | ||
| DE1996143933 DE19643933C1 (en) | 1996-10-30 | 1996-10-30 | Screw connection method for industrial assembly process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1235570A true CN1235570A (en) | 1999-11-17 |
Family
ID=7809682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97199364 Pending CN1235570A (en) | 1996-10-30 | 1997-09-11 | Method for producing screw connections |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0935514A1 (en) |
| JP (1) | JP2001511073A (en) |
| CN (1) | CN1235570A (en) |
| AU (1) | AU719448B2 (en) |
| BR (1) | BR9712394A (en) |
| CA (1) | CA2269949A1 (en) |
| DE (1) | DE19643933C1 (en) |
| WO (1) | WO1998018601A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114952239A (en) * | 2022-06-07 | 2022-08-30 | 江苏悦阳光伏科技有限公司 | Automatic installation and effect detection device of photovoltaic module junction box cover |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE518436C2 (en) * | 1998-05-14 | 2002-10-08 | Atlas Copco Tools Ab | Method for determining the axial force of a threaded fastener when tightening over the tension limit |
| DE19944702A1 (en) * | 1999-09-17 | 2001-03-22 | Weber Schraubautomaten Gmbh | Screwing device |
| DE19944717A1 (en) * | 1999-09-17 | 2001-03-22 | Weber Schraubautomaten Gmbh | Method for operating a screwing device |
| DE10042291C1 (en) * | 2000-08-29 | 2002-02-14 | Fraunhofer Ges Forschung | Method to monitor screwing process; involves using pulse-echo technique before and during screwing process and comparing echo times for screw material and screwing tension |
| US20080131228A1 (en) * | 2006-11-30 | 2008-06-05 | Caterpillar Inc. | Fastener tightening system utilizing ultrasonic technology |
| JP5163270B2 (en) * | 2008-05-13 | 2013-03-13 | マツダ株式会社 | Bolt fastening method and apparatus |
| FR3006765B1 (en) * | 2013-06-11 | 2015-07-03 | Airbus Operations Sas | METHOD AND DEVICE FOR DETECTING AN ACOUSTIC TRANSMITTING PHENOMENON |
| US20170321502A1 (en) * | 2016-05-06 | 2017-11-09 | Baker Hughes Incorporated | Use of acoustic emission technology in oilfield tubular make ups |
| CN107470896B (en) * | 2017-09-05 | 2019-04-12 | 天合汽车零部件（上海）有限公司 | Fastener external screw thread just matches internal screw thread monitoring device and monitoring method |
| DE102019211303A1 (en) * | 2019-07-30 | 2021-02-04 | Robert Bosch Gmbh | Method for recognizing the work progress of a hand machine tool |
| DE102021124669A1 (en) | 2021-09-23 | 2023-03-23 | Bayerische Motoren Werke Aktiengesellschaft | Procedure for process control in screwing processes |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU84553A1 (en) * | 1982-12-24 | 1984-10-22 | Benoit De Halleux | METHOD OF MEASURING CONSTRAINT IN A MEDIUM AND ELEMENT AND ASSEMBLY FOR IMPLEMENTING THE METHOD |
| JPS60150919A (en) * | 1984-01-13 | 1985-08-08 | Hitachi Ltd | Automatic fastener for screw for mold-frame |
| JPH02274441A (en) * | 1989-04-18 | 1990-11-08 | Honda Motor Co Ltd | Looseness detecting device for thread member |
| JP2913322B2 (en) * | 1989-09-08 | 1999-06-28 | 横浜ゴム株式会社 | Runflat pneumatic radial tires |
| DE4017726C2 (en) * | 1990-06-01 | 1993-12-16 | Kellermann Fa Rudolf | Fastening screw |
| DE4025430A1 (en) * | 1990-08-10 | 1992-02-13 | Psm Drucklufttechnik Vertrieb | Torque controlled screwing head - has electroacoustic sensor to measure distortion of bolt under torque |
| US5277261A (en) * | 1992-01-23 | 1994-01-11 | Makita Corporation | Tightening tool |
| DE4410722A1 (en) * | 1994-03-28 | 1995-10-05 | Bosch Gmbh Robert | Non-contact bolt tightening force measurement appts. for quality control |
| JPH0858284A (en) * | 1994-08-29 | 1996-03-05 | Kotobuki:Kk | Propelling pencil |
| DE19507391C2 (en) * | 1994-09-06 | 2003-08-14 | Bosch Gmbh Robert | Screwing device for ultrasound-controlled tightening of screw connections |
-
1996
- 1996-10-30 DE DE1996143933 patent/DE19643933C1/en not_active Expired - Fee Related
-
1997
- 1997-09-11 JP JP51995898A patent/JP2001511073A/en active Pending
- 1997-09-11 CN CN 97199364 patent/CN1235570A/en active Pending
- 1997-09-11 AU AU45549/97A patent/AU719448B2/en not_active Ceased
- 1997-09-11 WO PCT/EP1997/004986 patent/WO1998018601A1/en not_active Application Discontinuation
- 1997-09-11 EP EP97943860A patent/EP0935514A1/en not_active Withdrawn
- 1997-09-11 CA CA002269949A patent/CA2269949A1/en not_active Abandoned
- 1997-09-11 BR BR9712394-3A patent/BR9712394A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114952239A (en) * | 2022-06-07 | 2022-08-30 | 江苏悦阳光伏科技有限公司 | Automatic installation and effect detection device of photovoltaic module junction box cover |
| CN114952239B (en) * | 2022-06-07 | 2023-10-20 | 江苏悦阳光伏科技有限公司 | Automatic installation and effect detection device for junction box cover of photovoltaic module |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19643933C1 (en) | 1998-03-12 |
| CA2269949A1 (en) | 1998-05-07 |
| BR9712394A (en) | 1999-08-31 |
| WO1998018601A1 (en) | 1998-05-07 |
| AU719448B2 (en) | 2000-05-11 |
| EP0935514A1 (en) | 1999-08-18 |
| AU4554997A (en) | 1998-05-22 |
| JP2001511073A (en) | 2001-08-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1235570A (en) | Method for producing screw connections | |
| Brinksmeier | Prediction of tool fracture in drilling | |
| CA1178372A (en) | Rotating tool wear monitoring apparatus | |
| CN109623494B (en) | Three-in-one sensor clamp and multi-mode cutter wear state monitoring system | |
| US5783751A (en) | Cutting force sensor in the form of a turret locking screw | |
| US11029286B2 (en) | Ultrasonic cutter quality inspection method and device | |
| US4532599A (en) | Quality control method | |
| König et al. | Tool monitoring of small drills with acoustic emission | |
| EP1004012A1 (en) | Diagnostic rule base tool condition monitoring system | |
| US4555955A (en) | Combination loading transducer | |
| EP0436843A1 (en) | Reduction of relaxation induced tension scatter in fasteners | |
| US20080131228A1 (en) | Fastener tightening system utilizing ultrasonic technology | |
| JP2010117334A (en) | Method and instrument for measuring bolt axial force | |
| CN104950811A (en) | Method for fast judging assembling quality of numerically-controlled machine tool feeding system | |
| US6581472B2 (en) | Method of monitoring and controlling a screwing process | |
| Kim et al. | Development of a tool failure detection system using multi-sensors | |
| WO2004027271A2 (en) | Thread forming fasteners for ultrasonic load measurement and control | |
| US6421902B1 (en) | Method and device for producing and checking screwed connections | |
| JPH0985585A (en) | Monitoring method and device for state of machining cutter for machine tool | |
| Jemielniak et al. | Tool and process monitoring-state of art and future prospects | |
| KR101567549B1 (en) | Management System of torque applying device using Test Equipment of torque applying device | |
| Sampath et al. | Tool health monitoring using acoustic emission | |
| Novak et al. | Reliability of the cutting force monitoring in FMS-installations | |
| JPH068111A (en) | Drill life judgment method | |
| KR950001775B1 (en) | Machine tool's failure monitering method for nc lathe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |