WO2005014232A1 - Outil de vissage servant a visser des composants sensibles et procedes correspondants - Google Patents

Outil de vissage servant a visser des composants sensibles et procedes correspondants Download PDF

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Publication number
WO2005014232A1
WO2005014232A1 PCT/DE2004/001117 DE2004001117W WO2005014232A1 WO 2005014232 A1 WO2005014232 A1 WO 2005014232A1 DE 2004001117 W DE2004001117 W DE 2004001117W WO 2005014232 A1 WO2005014232 A1 WO 2005014232A1
Authority
WO
WIPO (PCT)
Prior art keywords
screwing
torque
angle
screwing tool
controlled
Prior art date
Application number
PCT/DE2004/001117
Other languages
German (de)
English (en)
Inventor
Christian Braeurer
Stefan Holl
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2005014232A1 publication Critical patent/WO2005014232A1/fr

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

  • Screwing tool for screwing in sensitive components and methods therefor
  • the invention relates to a screwing tool for screwing in a sensitive mounting element and a method therefor.
  • the value of the torque is measured and the mounting element is not rotated further than until a predetermined torque, the target torque, is reached.
  • the mounting element In the case of the angular pull, a certain target screwing angle is specified and the mounting element is screwed in only by this screwing angle.
  • the mounting element which can be a screw, a nut or a screwable functional component, such as a spark plug, an electrode or a valve, is on the one hand screwed so tightly to the desired one
  • the screw connection is not carried out so tightly that there is damage to the threads or even to the component
  • Screwing tool experiences a torsion even when turning, which is not taken into account in the angle measurement. This misalignment cannot be corrected by adding a lump sum to the target rotation angle, since the torsion of the screwing tool is a complex process. The actual screwing angle can be found in
  • the angle tightening method is primarily suitable for expansion screws, i.e. assembly elements that are themselves not susceptible to torsion.
  • assembly elements can be screwed in too tightly and possibly suffer a deformation that damages them.
  • the object of the invention is to achieve a durable screw connection without or with only slight or defined deformation of the mounting element.
  • the solution to the problem is to present a screwing tool that includes a protractor in addition to a torque meter, so that after reaching a predetermined value for the torque, the torque threshold value, the screwing tool also has a defined angle that is greater than 0 degrees , is rotated further.
  • the task is further solved by a method which consists of a sequence of torque-controlled and angle-controlled screwing-in steps.
  • An essential advantage of the invention is that the screwing tool according to the invention enables a screw connection in which a possible deformation of the mounting element either does not take place at all or at least does not depend on the friction between the screw connection surfaces.
  • the mounting element is initially only rotated until a torque threshold value has been reached, it can be ensured by suitable selection of this threshold value that the mounting element is not impaired with such a tightening force.
  • the mounting element is rotated further by a defined angle which can be controlled by the protractor. This is selected so that the additional torque which is exerted by the further rotation by the angle does not produce any deformation or a predetermined deformation which impairs the later functioning of the mounting element.
  • the screwing tool according to the invention can be designed as a hand-held tool that has a torque and angle display for an operator. It can also be used as a fully automatic tool in a production line or as a tool element of a robot. For the automatic It is advantageous if the screwdriver has an interface that can be used to enter the torque threshold and the defined angle of rotation.
  • the invention is advantageously further developed by the screwing tool having a control unit which, depending on one or more torque threshold values, permits a successive sequence of torque and torque-controlled screwing in.
  • the advantage of the method claimed in accordance with the invention also lies in the fact that screwing in is made possible, in which a tight screw connection is achieved and at the same time the assembly element is treated gently. Depending on what the assembly element is, care must be taken, for example, that the assembly element is not twisted or that the screw connection can be released again.
  • an additional process step can be introduced. After tightening the mounting element up to a specified torque, the screw connection is loosened again in order to then carry out the torque-controlled screw connection again.
  • the screwing surfaces of the mounting element and its screwing partner i.e. the contact surfaces of the elements to be screwed
  • the screwing surfaces of the mounting element and its screwing partner i.e. the contact surfaces of the elements to be screwed. It may be that dirt particles between the screwing surfaces, canting of the tool to the mounting element, hardening of the lubricant or other undesired influences, during the screwing, a torque is briefly generated that reaches the threshold value and triggers the termination of the screwing process. In this case there is a so-called "spurious" increase in torque.
  • connection may not be strong enough.
  • the screwing surfaces are moved against each other when loosening and the screwing of the now smoothed screwing surfaces is carried out again in a torque-controlled manner.
  • the screw connection can be continued by a predetermined angle, either by a negative angle, whereby the screw connection is loosened again somewhat, by a positive angle, in accordance with the method described above, or by the angle 0 degrees, which is a purely torque-controlled screw connection equivalent.
  • the method according to the invention is advantageously further developed by loosening the screwing process only up to a certain second lower threshold value of the torque.
  • the second threshold value can be used to ensure that the assembly element is not completely loosened, but rather that the assembly element remains in contact with its screwing partner. This prevents slipping and prevents repositioning.
  • Figure 1 shows the relationship between torque and mounting angle in the conventional torque-controlled screw connection
  • Figure 2 shows the relationship between torque and mounting angle with successively carried out torque and angle-controlled screw connection.
  • Figure 1 shows the relationship between torque, plotted on the y-axis 1 and the angle of rotation by which the mounting element is rotated, hereinafter referred to as the mounting angle, plotted on the x-axis 2 in the conventional torque-controlled screw connection.
  • the mounting angle plotted on the x-axis 2 in the conventional torque-controlled screw connection.
  • the diagram shows a number of assembly curves 4 which show the measured torque at a specific assembly angle for various screwing-in processes.
  • the slopes of the assembly curves 4 shown result from various friction between the screw surfaces of the assembly element and its screwing partner, lubricants, surface properties, manufacturing tolerances, etc., on which practically no influence can be exerted. In this example, there is a considerable spread 5 of the mounting bracket.
  • FIG. 2 shows the relationship between the torque, plotted on the y-axis 11 and the mounting angle, plotted on the x-axis 12, with the torque and angle-controlled screw connection being carried out successively.
  • the slopes of the mounting curves 14 correspond to those in FIG. 1, but the curves are shifted such that the reference angle 16 for all curves is at a specific torque 13, that is to say the curves do not intersect at the point at which the torque as in FIG. 1 and the mounting bracket has the value 0.
  • the assembly elements are initially only rotated up to a torque threshold value 13, in this example 10 Nm, and then rotated further by a predetermined angle 17, here 12 degrees.
  • the spread of the mounting bracket 15 is significantly smaller because it is related to the smaller torque threshold 13.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

L'invention concerne un outil de vissage comportant, outre un torsiomètre, un goniomètre de sorte que, lorsqu'une valeur seuil de couple de torsion est atteinte, l'outil de vissage continue d'être tourné d'une valeur angulaire définie, supérieure à 0°. L'invention concerne également des procédés qui comprennent une succession d'étapes de vissage comportant une régulation de couple de torsion et une régulation d'angle. L'invention permet d'obtenir un vissage solide ne provoquant aucune déformation de l'élément de montage ou seulement une déformation faible ou définie de ce dernier.
PCT/DE2004/001117 2003-07-28 2004-06-02 Outil de vissage servant a visser des composants sensibles et procedes correspondants WO2005014232A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10334245.1 2003-07-28
DE2003134245 DE10334245A1 (de) 2003-07-28 2003-07-28 Schraubwerkzeug zum Eindrehen empfindlicher Bauteile sowie Verfahren hierfür

Publications (1)

Publication Number Publication Date
WO2005014232A1 true WO2005014232A1 (fr) 2005-02-17

Family

ID=34071939

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2004/001117 WO2005014232A1 (fr) 2003-07-28 2004-06-02 Outil de vissage servant a visser des composants sensibles et procedes correspondants

Country Status (2)

Country Link
DE (1) DE10334245A1 (fr)
WO (1) WO2005014232A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012204009A1 (de) * 2012-03-14 2013-09-19 Mtu Friedrichshafen Gmbh Verfahren zur Montage eines Montageteils in eine Aufnahme in einer bestimmten Schraubstellung, Brennkraftmaschine mit einem in einer bestimmten Schraubstellung gesicherten Montageteil in einer Aufnahme
US10274021B2 (en) 2015-04-17 2019-04-30 Viant As&O Holding, Llc Two stage torque limiter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014209041A1 (de) * 2014-05-13 2015-11-19 Daimler Ag Roboterarbeitsplatz

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3926264A (en) * 1973-11-23 1975-12-16 Thor Power Tool Co Control circuit for a power tool
US4106570A (en) * 1977-02-07 1978-08-15 Rockwell International Corporation Angle sensing tool for applying torque
US4161221A (en) * 1976-11-22 1979-07-17 Atlas Copco Aktiebolag Method and apparatus for pretensioning screw joints
US5105519A (en) * 1985-06-19 1992-04-21 Daiichi Dentsu Kabushiki Kaisha Tension control method for nutrunner
DE4235954A1 (de) * 1991-10-23 1993-05-19 Utensilerie Ass Spa Verfahren und vorrichtung zur kontrolle des festspannwinkels in elektronischen drehmomentschluesseln
DE4307131A1 (de) * 1993-03-06 1994-09-08 Albert Kipfelsberger Kraftschrauber mit elektronischer Drehmomentbegrenzung
WO1999039880A1 (fr) * 1998-02-05 1999-08-12 Daimlerchrysler Ag Procede pour serrer des assemblages a vis
DE10133923A1 (de) * 2001-07-12 2003-01-23 Paul-Heinz Wagner Verfahren zur automatischen Steuerung eines Schraubvorgangs

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3926264A (en) * 1973-11-23 1975-12-16 Thor Power Tool Co Control circuit for a power tool
US4161221A (en) * 1976-11-22 1979-07-17 Atlas Copco Aktiebolag Method and apparatus for pretensioning screw joints
US4106570A (en) * 1977-02-07 1978-08-15 Rockwell International Corporation Angle sensing tool for applying torque
US5105519A (en) * 1985-06-19 1992-04-21 Daiichi Dentsu Kabushiki Kaisha Tension control method for nutrunner
DE4235954A1 (de) * 1991-10-23 1993-05-19 Utensilerie Ass Spa Verfahren und vorrichtung zur kontrolle des festspannwinkels in elektronischen drehmomentschluesseln
DE4307131A1 (de) * 1993-03-06 1994-09-08 Albert Kipfelsberger Kraftschrauber mit elektronischer Drehmomentbegrenzung
WO1999039880A1 (fr) * 1998-02-05 1999-08-12 Daimlerchrysler Ag Procede pour serrer des assemblages a vis
DE10133923A1 (de) * 2001-07-12 2003-01-23 Paul-Heinz Wagner Verfahren zur automatischen Steuerung eines Schraubvorgangs

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012204009A1 (de) * 2012-03-14 2013-09-19 Mtu Friedrichshafen Gmbh Verfahren zur Montage eines Montageteils in eine Aufnahme in einer bestimmten Schraubstellung, Brennkraftmaschine mit einem in einer bestimmten Schraubstellung gesicherten Montageteil in einer Aufnahme
DE102012204009B4 (de) * 2012-03-14 2014-12-11 Mtu Friedrichshafen Gmbh Verfahren zur Montage eines Montageteils in eine Aufnahme in einer bestimmten Schraubstellung, Brennkraftmaschine mit einem in einer bestimmten Schraubstellung gesicherten Montageteil in einer Aufnahme
US10274021B2 (en) 2015-04-17 2019-04-30 Viant As&O Holding, Llc Two stage torque limiter

Also Published As

Publication number Publication date
DE10334245A1 (de) 2005-02-17

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