EP0674566A1 - Procede pour le controle et l'asservissement de la tension d'un organe filete. - Google Patents
Procede pour le controle et l'asservissement de la tension d'un organe filete.Info
- Publication number
- EP0674566A1 EP0674566A1 EP93902338A EP93902338A EP0674566A1 EP 0674566 A1 EP0674566 A1 EP 0674566A1 EP 93902338 A EP93902338 A EP 93902338A EP 93902338 A EP93902338 A EP 93902338A EP 0674566 A1 EP0674566 A1 EP 0674566A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- force
- value
- unscrewing
- screwing
- fixing element
- 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.)
- Granted
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
Definitions
- the invention relates to a method for controlling and controlling the tension of a threaded member, such as a screw, bolt, nut, or other fastening elements, used in particular but not exclusively in screwed assemblies.
- a threaded member such as a screw, bolt, nut, or other fastening elements
- the purpose of the calculation notes for screwed connections is to determine the preload to be applied to the connection according to the payload (or service load) to which the connection will be subjected in its use and a dependent tightening factor the precision of the means for applying this preload.
- the tension to be applied in a threaded fastening element is generally achieved by transforming a rotational force into a tensile force generated by the helical size of the element's thread.
- This transformation has an imperfect yield mainly due to the friction losses of the surfaces in contact; therefore it will be necessary to apply a rotational force (torque) greater than the rotational force useful for this transformation.
- the pre-tightening torque can be an accidental torque, for example kneading the threads; in this case, the tension will be far from being achieved.
- the elastic limit point can be that of the first element which flares up in the chain of action and mechanical reaction.
- this method requires additional precautions generating costs.
- This method offers an accuracy of + 10% on the tension of a single point exploiting the full capacity of the fixing element for preload.
- the major drawback of this method is the penetration, even minimal, in the plastic area of the fastening element. Attempts to control and / or control the slope (directing coefficient of the tangent to the curve) at any point in the elastic zone have proved to be imprecise and dispersive. In this case, the dispersion of the torque due to friction is cumulated and the dispersion of the angle due to the flexibility of the assembly.
- This method is based on the variation of a travel time of the sound propagating only inside the fixing element and it is removed from all the other parameters not related to the element as well as variations of the thickness of the parts in engagement.
- the variation in travel time is in theory the direct representation of the elongation.
- the tension / elongation relationship is linked to the resistance of the material, to its section and to its initial length.
- This purely comparative method requires a modeling (specimen element) of the fixing element which will be tested for the determination of a variation of a specific travel time at a given tension.
- the determined elongation is only a small part of the actual length of the fastener. Indeed, when it comes to the propagation of a sound, only the stretched part of the fixing element participates in the elongation.
- This stretched part depends on the thickness of the parts in engagement.
- the machining tolerances have a direct impact on the lengthening observed.
- the fixing element intervenes in its geometrical dimensions in particular for the total variation of the travel time which depends on the length of the element relative to its stretched part. This variation has repercussions on the journey time and on its variation in the ratio of stretched length / total length.
- the parallelism of the reflection planes of the ultrasonic waves (essentially for a screw, the head and the bottom of the rod) intervenes directly in the effective position of the member for measuring the travel time.
- the elongation measurement must be carried out during the rise in tension of the element because the repositioning introduces errors which can double the degree of inaccuracy of the ultrasonic method.
- the precision of the effective measurement of the tension is similar to that of the elastic limit with the advantage of being able to be located at any point of the admissible load of the fixing element, with however the disadvantage of being only a probability of tension taking into account the reference to a specimen (theoretical model) resulting from the average treatment of a batch of fixing elements.
- the screw connection is made of elastic materials. Therefore, it behaves like a spring.
- Ft By lengthening this spring in its elastic range using a force Ft, an energy E which is expressed as follows is accumulated in this screwed assembly:
- This accumulated energy is not apparent and represents only a fraction of the energy applied due to the energy consumed by friction which in particular prevents spontaneous unscrewing of the fixing element.
- These frictions exist in an equivalent manner to screwing and unscrewing and are caused by the parts of the surfaces in contact with the various elements making up the assembly. Therefore there is a difference in energy applied to the screwing and unscrewing due to the energy which is accumulated at the screwing and returned to the unscrewing while the energy consumed by friction is constant.
- Eapp energy applied to the screwing of the fixing element
- Eapp ' energy applied to the unscrewing of the fixing element
- Ett energy consumed by the head or nut friction of the element fixation
- Capp torque applied to the screwing Capp ': torque applied to the unscrewing and vice versa:
- the tension force in tension or in compression
- the tension force can be controlled as a function proportional to the difference between the torque applied to the screwing, in particular the maximum torque at the stopping point, and the torque applied to the unscrewing, more particularly the maximum unscrewing torque, difference divided by (P / T), quantity proportional to the thread pitch.
- the quantity (P / T) constitutes a constant which allows the immediate transformation of the difference of the couples of the action of screwing, then of unscrewing a threaded fixing element, expressed in newton-meter
- EP-A- 0096620 does not contain any practical description of means which would make it possible to apply the theory developed in this document, and its single figure is limited to the representation of a conventional screwed assembly.
- the present invention aims to provide the improved process, by recommending a specific operating mode allowing good reproducibility and improved precision.
- the invention provides that the sampling of these torque values is carried out either statically at the rest limit of screwing and unscrewing, either dynamically in a succession of matching positions in screwing and unscrewing.
- a first embodiment of the method according to the invention consists in applying this method to a voltage measurement, using manual, mechanical, pneumatic, hydraulic or electric motor means capable, by means of a device for coupling on the threaded fixing element of an assembly, to ensure a controlled effort of rotation of this fixing element.
- the method is characterized by the action of screwing in order to take, at the rest limit of the sliding sliding part of the fastening element on the fixed part of the 'assembly, the value of the rotational force, then by the action of unscrewing for the purpose of removing, at the rest limit during the sliding of the movable part of the fixing element on the fixed part of the assembly, the value of the rotational force at its maximum passage, then to differentiate these two force values to divide them by a coefficient notably proportional to the pitch of the thread of the fixing element in order to obtain a value representing, within these precise limits: - either the tensile force undergone by the fastening element
- Ev 'element representative of the energy at the screwing limit Ed' element representative of the maximum unscrewing energy constant including " ⁇ constant of the circle by the motor efficiency by the transformer of the energy type P pitch of the thread in meters.
- the element representative of the energy can be any element giving the image of the torque of the motor means (intensity, voltage, pressure, etc.) by a constant or a function f (x), but also the moment of a mechanical means using the flexion or torsion of an organ for which the transformer is not necessarily a constant, but can also be a function (x).
- the method is characterized by the action of screwing in order to take off, at the start of the sliding of the movable part of the fixing element on the fixed part of the assembly, value of the rotational force, then take, at the rest limit of the sliding of the movable part of the fastening element on the fixed part of the assembly, the value of the rotational force, then by l action of unscrewing for the purpose of taking, at the rest limit during the sliding of the mobile part of the fastening element on the fixed part of the assembly, the value of the rotational force on passing through its maximum, then to differentiate these two force values to divide this result by a coefficient proportional to the pitch of the thread of the fixing element in order to obtain a value representing, for these particular values:
- Eg 'element representative of the energy at the start of tightening Ev' element representative of the energy at the tightening limit Ed 'element representative of the maximum unscrewing energy t constant including TL ” constant of the circle by the motor efficiency by the transformer of the energy type P pitch of the thread in meters
- the element representative of the energy can be any element giving the image of the torque of the motor means (intensity, voltage, pressure, etc.) by a constant or a function f (x), but also the moment of a mechanical means using bending or. torsion of an organ for which the transformer is not necessarily a constant, but can also be a function f (x).
- the indirect relation is established for the expression of the tension force in another measurement system, by an additional coefficient restoring the coherence between the units of force, and the units of distance.
- Non-destructive testing of the assembly is achievable by action previously defined tension measurement, followed by the action of re-tightening until the tightening effort taken first, namely:
- a simple servo-control is carried out in successive approximations (iterative method).
- the previously defined action is exercised, repeated as many times as necessary until the ratio of the necessary tension force to the existing tension force is equal to 1.
- the value of the screwing / unscrewing force can be moderated by a coefficient (of reduction) suitable for ensuring the convergence of the action towards the tension required in a number of strokes defined by the precision sought in the control of the action.
- an action is not tightened on a loose fastening element in order to take, at regular position intervals determined by the desired precision, the values of the rotational force, then the action of unscrewing with the aim of taking, at regular intervals for these same positions, the values of the rotational force, then position by position, for effective positions, to differentiate the value of rotational force at screwing from the value of force when unscrewing, to divide them by a coefficient proportional to the pitch of the thread of the fixing element in order to obtain a list of values representing, for each of the positions:
- This re-screwing action can be moderated both in the chosen position and in the value of the force in order to anticipate the inertia of the motor means used.
- This moderation could be a stored constant corresponding to a given rotation force, or deduced from the stopping phases of said means when the different values of rotation force are sampled on the fixing element.
- This re-screwing action can be corrected both in the chosen position and in the value of the force in order to integrate the torsion of the motor means, in particular when the position sensor is not integral with the fixing element or of the coupling member.
- This correction may come from a memorized correction table deduced from the torsional slope, that is to say from the ratio of the rotational force to its effective position.
- the concordance of the screwing / unscrewing positions can be achieved by correlation of the position at the maximum screwing effort with the position at the maximum unscrewing force, by disregarding in this case the notion of torsion slope.
- Non-destructive testing of the assembly can be carried out using manual, mechanical, pneumatic, hydraulic or electric motor means capable, via a coupling member on the threaded fastening element of an assembly, d '' ensure a controlled rotational force and a measurement of the effective position of rotation of the fastening element:
- d '' ensure a controlled rotational force and a measurement of the effective position of rotation of the fastening element:
- This re-screwing action may be moderated both in the chosen position and in the value of the force in order to anticipate the inertia of the motor means used.
- This moderation could be a stored constant corresponding to a given rotational force, or deduced from the stopping phase of said means when unscrewing.
- This re-screwing action can be corrected both in the chosen position and in the value of the force in order to integrate the torsion of the motor means, in particular when the position sensor is not integral with the fixing element. or the coupling member.
- This correction may come from a memorized correction table deduced from the torsional slope, that is to say from the ratio of the rotational force to its effective position.
- the position sensor sees the position of the fastening element through an assembly which deforms in proportion to the force of rotation applied by the motor means. As long as the resistive torque is not exceeded by the motor torque, the fastening element has not started its rotation while the position sensor registers a displacement proportional to the applied torque.
- the effective position is masked by an apparent position due to the deformation of the reaction chain.
- the torsional slope is established from the ratio of the value of the rotational force to the value of the position observed.
- the tangent to this slope is established by the variation of the value of the rotational force on the variation of the position value. The sudden change in the directing coefficient of the tangent to this slope, during the effective rotation of the fastening element, gives the precise position where this effective rotation occurs.
- the resistant torque of the fixing element results from the different contact surfaces, head or nut, rod, thread.
- the element is permanently subjected (when stretched) to a torsion due to the tension force on the helicoid of its net.
- the modification of the tension force will be carried out essentially when the resistance torque due to the thread is overcome.
- the total rotation of the fixing element is only carried out from the moment when the thread advances. There is therefore a delay in action between the rotation of the head or the nut and the actual rotation of the fixing element.
- This delay in action results in an additional twist or partial de-twist of the fastening element depending on whether one is screwing or unscrewing.
- This variation in torsion of the fastening element intervenes in the value of the position observed, in particular when the length of the fastening element is large relative to its section. This variation creates a difference in slope between screwing or unscrewing.
- V (n) and V (n- l) where n represents the rank of the value in the list provides a list of guiding coefficients which are used in the variation of their value: - to fix the starting point for the rise of the rotational force on the observed position (catching up of the clearances), by the sudden increase in the value of the directing coefficient;
- the unscrewing can be partial; - continue the screwing / unscrewing action, advancing this variable value as long as unscrewing is possible, the progression of this variable may be equal to the difference between this variable value and the value achieved during unscrewing or a fraction of this difference in order to moderate the action by ensuring a rapid convergence of this action towards the impossibility of unscrewing; the force value "delta" multiplied by a coefficient proportional to the pitch of the thread of the fixing element representing: - either the tensile force exerted by the fixing element
- the element representative of the energy can be any element giving the image of the torque of the motor means (intensity, voltage, pressure, etc.) by a constant or a function f (x), but also the moment of a mechanical means using the flexion, torsion or shock of an organ for which the transformer is not necessarily a constant, but can also be a function f (x).
- the drive means can only be controlled in a differential measurement or action.
- the control of the absolute rotation force is not essential.
- the performance of the fixing element is the result of the friction of the different surfaces in contact, head or nut, rod, thread.
- the distribution is unknown.
- the use of the "torsional slope" makes it possible to isolate each of the couples due to the friction of each part in contact, by the delayed rotation of each of the parts of the fixing element, observed by the torsional slope.
- Figure 1 shows a torque wrench for screwing with tension control by the method according to the invention
- Figure 2 is a diagram of the electrical and electronic circuits of the dynamometer of Figure 1;
- Figure 3 shows a slave screw spindle, implementing the method according to the present invention;
- Figure is a detail view of a screw connection achievable by means of the pin of Figure 3;
- Figure 5 is a diagram of the servo-control of the screw spindle of Figure 3.
- Figure 1 shows the external appearance of a torque wrench for screwing with tension control, the internal electrical and electronic circuits of the company being illustrated by the diagram of Figure 2 in which, for clarity of the drawing, are not shown certain discrete components which are not essential to understanding, as well as the power supplies from batteries capable of ensuring the portability and the autonomy of this torque wrench.
- a torque wrench with a capacity of 300 Nm, in which a torque gauge 1 with strain gauges, receiving a supply voltage denoted VA with a value of 10 volts, delivers a voltage proportional to the applied torque.
- a first amplifier 2 with a gain of 1000 produces on its output a relationship such that for each l Nm of torque a signal - / + 33.333 mV is ensured depending on the direction of the screwing performed.
- the output of amplifier 2 is connected to the inputs of two blocking samplers 3,4, as well as to the inputs of two comparators 5,6.
- the first grouping of sampler-blocker 3 and comparator 5 stores the screwing torque on the right, negative in signal, by the fact that comparator 5 compares the output of the sampler-blocker 3 with its input and only when the input is greater than the output, this comparator 5 causes the blocker mode of the sampler-blocker through an OR logic gate 7, thus memorizing the highest value of the torque measured in the direction of screwing to the right.
- the second sampler-blocker group 4 and comparator 6 memorizes the screwing torque on the left, positive in signal, by the fact that comparator 6 compares the output of the sampler-blocker 4 with its input and that when the input is greater than the output, this comparator 6 causes the blocker mode of the sampler-blocker 5 through an OR logic gate 8 thus memorizing the highest value of the torque measured in the direction of screwing to the left.
- Each comparator output 5.6 is connected to an OR logic gate 7.8 having in common an input connected to a push button 9 enabling the memories of the torque values acquired during right-hand tightening and tightening to be reset to zero. left.
- each sampler-blocker 3,4 are connected to the input of an amplifier 10, wired in summing mode so that the gain only applies to the difference of the outputs of the sampler-blockers 3,4 by the fact that one is negative and the other positive, the algebraic sum producing a subtraction.
- the amplifier 10 produces a gain proportional to the pitch of the screw chosen by a selector 11 which allows a choice of different screw pitches in the range of torques applicable by the key.
- the selector 11 directs a gain range by assigning a resistance suitably calculated in the gain loop of the amplifier 10.
- the output of the amplifier 10 is connected to the input of an analog-digital converter controlling a digital display in a voltmeter function with display 12.
- the digital display is established for from 0 to - / + 199.99, a scale which translates directly from KN (Kilo-newtons) for voltages which go from 0 to - / + 5 volts.
- a brushless electric motor 13 is powered by a power control module 14 which regulates the phase frequency, the voltage and the electric current, and therefore makes it possible to control the rotor of the motor 13 in speed, in direction of rotation and power.
- the position information of the rotor is provided by a synchro-resolver 15 integral with the motor shaft supporting the rotor.
- the position of the synchro-resolver 15 determined by a sine / cosine phase shift is converted into digital data by a converter 16.
- the converter 16 which allows different precisions (10,12,14,16 bits) is adjusted to provide 12 bits of precision on one turn of the synchro-resolver is a definition 1/4096 of turn or 5.27 minutes of arc.
- the fastener 18 is rotated by a coupling member 23 such as a socket which covers the head 21 of the fastener 18 and which is driven by the square 24 of the axis 25 of the spindle constituting the motor shaft.
- the compression forces Fc of the part 20 are balanced by the tension force Ft of the fixing element 18.
- the signal supplied by the torque meter 17 is amplified by an instrumentation amplifier 26 whose output is connected to the input of an analog / digital converter 27, which provides 1 1 bits of resolution in bi-polar mode, ie for the torque meter 1 7 at the nominal of 500 Newtons. meter, a definition of 500/2048 or 0.244 Nm / bit.
- the digital data of the converters 27 and 16 pass over a bus 28 and are processed by a processor 29 which acts according to a program in memory at 30 and stores its digital data in a memory 31.
- the processor 29 manages the power control module 14 for the cycles required for screwing / unscrewing / re-screwing.
- the memory 31 contains in particular the tightening parameters such as desired tension, maximum torque applicable to the fixing element, not of the fixing element, speed of rotation of the motor 13, etc. These parameters are entered on a module communication interface 32 by means of a terminal or a network.
- the memory 31 also contains the measurements carried out at the screwing and unscrewing in the form of tables (lists of values) as well as the calculation results allowing the decisions of motor control for the tightening in tension and the final results to be produced by I use the communication interface 32 for the terminal and / or the printer.
- An input / output interface 33 provides the decision-making environment so that an operator or a PLC can, on the one hand by the inputs, start the cycle, stop in an emergency, etc., and on the other hand by the outputs view checks on indicator lights, etc.
- the processor 29 takes the rotor position and assigns to this position the numerical value of the torque exerted by the spindle in an array stored in memory 31, dimensioned by example at 16384 values (4 rotations of the rotor), then starts the operation each time the position changes to a torque value determined by the setting.
- the processor thus creates in the table a first list of a succession of torque values in tightening.
- the processor repeats the same operations for the unscrewing phase, for the same positions in opposite directions, creating a second list of a succession of torque values. unscrewing. Then position by position, for the same positions in each list, the processor subtracts the torque value from the second list from the • Torque meur from the first list, thus creating a third list made up of the differences in screwing and unscrewing torque for identical positions.
- the processor 29 calculates, position by position, the tension existing in the screw. Then by comparing the calculated tension with the desired tension, it determines the position until which it is re-screwed.
- the algorithm of the processing is greatly accelerated, by a pre-calculation of the desired tension translated in the form of the desired torque difference, leaving only the comparison to be made with the third list, and by limiting the number of comparisons to the first match thus reducing the excursion of the program.
- the processing speed of modern processors (several million instructions per second) makes electronic times insignificant compared to mechanical times. Indeed, the processing time of the voltage control is quite simply masked by the mechanical time of the actual reversal of the direction of the motor.
- the invention is not limited to the sole modes of implementing this method for controlling and controlling the tension or compression of a threaded member which have been described above by way of description. 'example. It embraces, on the contrary, all the variants of implementation using the same principle in order to determine a value of force or of enslavement to a value of force representing either a tensile force undergone by a fixing element, or a compressive force exerted by a fixing element, that is to say a tension force residing in a fixing element.
- the invention also encompasses all the application variants aiming at a similar aim and using the same principle, and it is thus, in particular, that the process which it relates can be extended to a threaded member allowing the transformation of a movement. of rotation into a linear movement, or the reciprocal transformation of a linear movement into a movement of rotation, with force transmission, this in particular in weighing, lifting or pressing apparatus.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9108254A FR2677571B1 (fr) | 1991-06-14 | 1991-06-14 | Procede pour le controle et l'asservissement de la tension d'un organe filete. |
PCT/FR1992/001192 WO1994013437A1 (fr) | 1991-06-14 | 1992-12-16 | Procede pour le controle et l'asservissement de la tension d'un organe filete |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0674566A1 true EP0674566A1 (fr) | 1995-10-04 |
EP0674566B1 EP0674566B1 (fr) | 1997-10-01 |
Family
ID=9414616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93902338A Expired - Lifetime EP0674566B1 (fr) | 1991-06-14 | 1992-12-16 | Procede pour le controle et l'asservissement de la tension d'un organe filete |
Country Status (7)
Country | Link |
---|---|
US (1) | US5571971A (fr) |
EP (1) | EP0674566B1 (fr) |
DE (1) | DE69222543T2 (fr) |
DK (1) | DK0674566T3 (fr) |
ES (1) | ES2109475T3 (fr) |
FR (1) | FR2677571B1 (fr) |
WO (1) | WO1994013437A1 (fr) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2677571B1 (fr) * | 1991-06-14 | 1995-08-04 | Ciandar | Procede pour le controle et l'asservissement de la tension d'un organe filete. |
US5970798A (en) * | 1997-09-25 | 1999-10-26 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Ultrasonic bolt gage |
EP0914910A1 (fr) * | 1997-10-30 | 1999-05-12 | Yukitaka Murakami | Méthode et dispositif de vissage, accessoire de vissage et mémoire pour un programme de commande du couple |
US5941972A (en) | 1997-12-31 | 1999-08-24 | Crossroads Systems, Inc. | Storage router and method for providing virtual local storage |
FR2780785B1 (fr) | 1998-07-03 | 2000-10-13 | Sam Outillage | Procede et dispositif de mesure et de serrage d'un assemblage par organe filete |
SE512778C2 (sv) * | 1998-09-17 | 2000-05-15 | Nobel Biocare Ab | Anordning vid instrument som innefattar eller är anslutet till ett idragningsverktyg |
US6975050B2 (en) | 2000-01-07 | 2005-12-13 | Black & Decker Inc. | Brushless DC motor |
WO2001052384A1 (fr) | 2000-01-07 | 2001-07-19 | Black & Decker Inc. | Moteur a courant continu sans balai |
US6538403B2 (en) | 2000-01-07 | 2003-03-25 | Black & Decker Inc. | Brushless DC motor sensor control system and method |
US6810747B2 (en) * | 2000-02-07 | 2004-11-02 | Kistler Holding Ag | Test device for determining the friction and prestress values of screwed connections |
US6629055B2 (en) * | 2001-09-28 | 2003-09-30 | Spx Corporation | Apparatus and method for sensing torque angle |
US6965835B2 (en) * | 2001-09-28 | 2005-11-15 | Spx Corporation | Torque angle sensing system and method with angle indication |
JPWO2007099629A1 (ja) * | 2006-03-01 | 2009-07-16 | 富士通株式会社 | モータ制御装置およびモータ制御方法 |
SE534698C2 (sv) * | 2010-06-08 | 2011-11-22 | Rocan System Ab | Anordning och metod för att indikera om ett fästelement vid infästning i ett stycke har uppnått en sträckgränsbelastning |
US20130114994A1 (en) | 2011-11-04 | 2013-05-09 | Robert Erik Grip | Truss end pad fitting |
US9574587B2 (en) * | 2011-11-04 | 2017-02-21 | The Boeing Company | Preloading a fastener of a mechanical fitting |
US9127998B1 (en) * | 2012-09-04 | 2015-09-08 | University Of South Florida | Active ultrasonic method of quantifying bolt tightening and loosening |
US20170043460A1 (en) * | 2014-03-18 | 2017-02-16 | Atlas Copco Industrial Technique Ab | Method for a threaded joint mounting process |
KR102368798B1 (ko) * | 2016-06-03 | 2022-02-28 | 아틀라스 콥코 인더스트리얼 테크니크 에이비 | 펄스 조임을 통한 클램프력 추정 |
SE542127C2 (en) * | 2018-04-18 | 2020-02-25 | Atlas Copco Ind Technique Ab | Hand held electric pulse tool and a method for tightening operations |
JP6501965B1 (ja) * | 2018-12-11 | 2019-04-17 | 株式会社東日製作所 | ボルト及びナットの締付け方法及び締付け装置 |
CN112710423B (zh) * | 2020-12-24 | 2021-08-17 | 东风汽车集团有限公司 | 一种发动机关键螺栓试验后夹紧力测量及评价方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3969810A (en) * | 1974-05-13 | 1976-07-20 | Pagano Dominick A | Method for tightening a bolt to exert a predetermined tension force by monitoring bolt elongation while the bolt is being installed |
US4016938A (en) * | 1975-12-02 | 1977-04-12 | Ingersoll-Rand Company | Method for fastener tensioning |
US4037282A (en) * | 1976-03-08 | 1977-07-26 | Dahl Norman C | Process for creating overload protection against yielding in bolts |
US4142266A (en) * | 1976-06-07 | 1979-03-06 | Dahl Norman C | Method for creating overload protection against yielding in bolts |
DE2749536C3 (de) * | 1977-11-03 | 1980-09-04 | Kraftwerk Union Ag, 4330 Muelheim | Anordnung zum Messen der Vorspannung eines insbesondere zum Verschluß eines Reaktordruckbehälters dienenden Schraubenbolzens |
FR2527714A1 (fr) * | 1982-05-26 | 1983-12-02 | Renault | Procede de serrage d'un assemblage comportant un element d'assemblage filete |
DE4024577C2 (de) * | 1990-08-02 | 1999-08-26 | Bosch Gmbh Robert | Verfahren zur Steuerung einer Vorspannkraft in einer Schraubverbindung |
FR2677571B1 (fr) * | 1991-06-14 | 1995-08-04 | Ciandar | Procede pour le controle et l'asservissement de la tension d'un organe filete. |
-
1991
- 1991-06-14 FR FR9108254A patent/FR2677571B1/fr not_active Expired - Fee Related
-
1992
- 1992-12-16 US US08/481,430 patent/US5571971A/en not_active Expired - Fee Related
- 1992-12-16 DE DE69222543T patent/DE69222543T2/de not_active Expired - Fee Related
- 1992-12-16 EP EP93902338A patent/EP0674566B1/fr not_active Expired - Lifetime
- 1992-12-16 WO PCT/FR1992/001192 patent/WO1994013437A1/fr active IP Right Grant
- 1992-12-16 ES ES93902338T patent/ES2109475T3/es not_active Expired - Lifetime
- 1992-12-16 DK DK93902338.8T patent/DK0674566T3/da active
Non-Patent Citations (1)
Title |
---|
See references of WO9413437A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE69222543D1 (de) | 1997-11-06 |
WO1994013437A1 (fr) | 1994-06-23 |
US5571971A (en) | 1996-11-05 |
DK0674566T3 (da) | 1998-05-04 |
ES2109475T3 (es) | 1998-01-16 |
DE69222543T2 (de) | 1998-04-23 |
FR2677571B1 (fr) | 1995-08-04 |
EP0674566B1 (fr) | 1997-10-01 |
FR2677571A1 (fr) | 1992-12-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0674566B1 (fr) | Procede pour le controle et l'asservissement de la tension d'un organe filete | |
EP2057450A2 (fr) | Procede et dispositif d'etablissement et de controle d'un serrage hydraulique d'un ou de plusieurs boulons | |
FR2871231A1 (fr) | Procede de controle de la mise sous tension d'une tige, du type vis ou goujon d'assemblage, et dispositif de mise en oeuvre d'un tel procede | |
FR2936056A1 (fr) | Dispositif d'indentation continue ou instrumentee a surface de support convexe et son utilisation, notamment pour l'indentation de toles. | |
FR3000197A1 (fr) | Procede de controle d'un assemblage et dispositif associe | |
CA2326648C (fr) | Procede pour mesurer par ultrasons la tension residuelle d'une barre de precontrainte | |
FR3043351A1 (fr) | Procede et dispositif de controle du serrage d'un assemblage par une fixation filetee | |
FR2751077A1 (fr) | Procede et dispositif pour tester des tournevis | |
WO2011064517A1 (fr) | Dispositif d'indentation continue ou instrumentee | |
FR2852879A1 (fr) | Cle a serrage controle | |
EP3839679A1 (fr) | Procédé de contrôle d'un niveau de qualité de vissage d'une visseuse, dispositif associé et programme mettant en oeuvre le procédé | |
EP0096620B1 (fr) | Procédé de serrage d'un assemblage comportant un élément d'assemblage fileté | |
FR2599793A1 (fr) | Systeme de bielle destine a resister a un seuil d'efforts longitudinaux | |
EP3287237B1 (fr) | Dispositif de vissage à mesure de couple de sortie optimisée, et procédé de détermination du couple de sortie correspondant | |
FR3075678A1 (fr) | Procede de determination du dommage d'un outil tournant, et dispositif correspondant | |
FR3047681A1 (fr) | Presse de serrage mecanique a dynamometre | |
FR2930196A1 (fr) | Procede de surveillance d'un pneumatique | |
FR3009752B1 (fr) | Banc d'essai a sollicitation uniaxiale et procede d'essai mis en oeuvre avec ce banc | |
CH716888B1 (fr) | Dispositif de caractérisation dynamique d'outils rotatifs d'horlogerie. | |
FR3038721A1 (fr) | Tribometre pour la mesure de champs de deplacements a l'interface de deux elements | |
FR2785986A1 (fr) | Procede de mesure et/ou de commande d'un equipement de vissage comprenant une visseuse hydropneumatique a martelement | |
FR2683039A1 (fr) | Procede et dispositif pour le controle de l'angle de serrage des cles dynamometriques electroniques. | |
FR3097049A1 (fr) | Procédé et système de détermination du coefficient de frottement dans un assemblage boulonné | |
EP2766709A1 (fr) | Dispositif de determination du comportement mecanique local d'une eprouvette de materiau | |
WO2023280882A1 (fr) | Capteur d'usure de garniture de frein |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19950613 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE DE DK ES GB IT NL PT SE |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
17Q | First examination report despatched |
Effective date: 19961204 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
RBV | Designated contracting states (corrected) |
Designated state(s): BE DE DK ES GB IT NL PT SE |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE DE DK ES GB IT NL PT SE |
|
REF | Corresponds to: |
Ref document number: 69222543 Country of ref document: DE Date of ref document: 19971106 |
|
ITF | It: translation for a ep patent filed |
Owner name: BARZANO' E ZANARDO MILANO S.P.A. |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19971212 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2109475 Country of ref document: ES Kind code of ref document: T3 |
|
REG | Reference to a national code |
Ref country code: PT Ref legal event code: SC4A Free format text: AVAILABILITY OF NATIONAL TRANSLATION Effective date: 19971211 |
|
REG | Reference to a national code |
Ref country code: DK Ref legal event code: T3 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: PT Payment date: 20061213 Year of fee payment: 15 |
|
REG | Reference to a national code |
Ref country code: PT Ref legal event code: MM4A Free format text: LAPSE DUE TO NON-PAYMENT OF FEES Effective date: 20080616 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080616 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DK Payment date: 20081230 Year of fee payment: 17 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20090116 Year of fee payment: 17 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20081228 Year of fee payment: 17 Ref country code: DE Payment date: 20090112 Year of fee payment: 17 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20090116 Year of fee payment: 17 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 20090205 Year of fee payment: 17 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20081230 Year of fee payment: 17 Ref country code: IT Payment date: 20081229 Year of fee payment: 17 |
|
BERE | Be: lapsed |
Owner name: *CIANDAR Effective date: 20091231 |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: V1 Effective date: 20100701 |
|
EUG | Se: european patent has lapsed | ||
REG | Reference to a national code |
Ref country code: DK Ref legal event code: EBP |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20091216 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100701 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20091231 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100701 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20091216 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100104 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20110325 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20091216 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20091217 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20110314 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20091217 |