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EP1958917B1 - Coup de télescopage - Google Patents

Coup de télescopage Download PDF

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Publication number
EP1958917B1
EP1958917B1 EP20070024227 EP07024227A EP1958917B1 EP 1958917 B1 EP1958917 B1 EP 1958917B1 EP 20070024227 EP20070024227 EP 20070024227 EP 07024227 A EP07024227 A EP 07024227A EP 1958917 B1 EP1958917 B1 EP 1958917B1
Authority
EP
European Patent Office
Prior art keywords
thickness
section
metal sheet
welding
cut
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.)
Ceased
Application number
EP20070024227
Other languages
German (de)
English (en)
Other versions
EP1958917A1 (fr
Inventor
Engelbert Häbe
Joachim Henkel
Walter Gundel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liebherr Werk Ehingen GmbH
Original Assignee
Liebherr Werk Ehingen 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 Liebherr Werk Ehingen GmbH filed Critical Liebherr Werk Ehingen GmbH
Publication of EP1958917A1 publication Critical patent/EP1958917A1/fr
Application granted granted Critical
Publication of EP1958917B1 publication Critical patent/EP1958917B1/fr
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/708—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic locking devices for telescopic jibs

Definitions

  • the invention relates to a telescopic weft according to the preamble of claim 1.
  • Telescopic shots are used, for example, in mobile cranes. They usually consist of profile tubes. After pushing out, they are bolted together. These Verbolzstellen transfer large forces. They are usually carried out reinforced. Such a reinforced design is usually carried out by a further sheet metal layer which is applied in this area. This additional sheet metal layer is referred to as a bolt plate or locking plate.
  • the bolt plates or locking plates are welded onto the profile tube at the bolting point.
  • the bolted joints are reinforced by the welded-on sheet metal.
  • the base material of the telescopic section but charged by the welding process.
  • the welding process itself is expensive.
  • the so-called MAG welding process is usually used.
  • Object of the present invention is therefore to provide a generic telescope shot with a simple to apply and structurally stable Verbolzstelle.
  • a telescopic weft which consists of a profile tube with at least one recess having a Verbolzstelle, with a Verbolzstelle provided from a metal sheet, which is welded via a butt weld via laser beam welding or laser hybrid welding in the profile tube.
  • Laser beam welding in contrast to laser hybrid welding, has the great advantage that no filler metal is required because the base material alone is melted and forms the weld seam. Thus, the yield strength of the base material can be fully utilized. Laser hybrid welding is used when there is a larger gap between the sheets to be joined.
  • the bolt plate can not be welded according to the teaching of claim 1, since due to the strong shrinkage stresses in the radial direction already at or shortly after welding there is a risk of cracking at or in the seam.
  • Verbolzstelle forming sheet of the same material as the profile tube but is formed comparatively thicker.
  • the Verbolzstelle is circular and its serving to receive a bolt recess is arranged almost centrally.
  • the plate forming the bolting point has a thickness increasing towards its recess in the direction of the bolting point.
  • the bolted plate is designed in such a way that the sheet forming the bolting point thickens steadily from the sheet thickness of the profile tube to the larger thickness of the plate-shaped central area around the recess.
  • FIG. 1 the plan view of a top flange of a telescopic section belonging to a profile tube 10 is shown, in which a Verbolzstelle 12 is arranged in the form of a Verbolztellers.
  • the Verbolzstelle 12 has almost centrally a recess 14 through which a not shown here bolts for producing a bolt connection can be inserted.
  • FIG. 1 In the illustration according to FIG. 1 only a section of the telescopic section forming a profile tube 10 is shown.
  • the telescopic weft is to be bolted after pushing out with another telescopic weft with appropriate Verbolzstelle.
  • Verbolzvorganges The manner of such a Verbolzvorganges is well known and will therefore not be shown again in detail at this point.
  • the statement made in the exemplary embodiment with respect to the telescopic weft statement applies in the same way to an articulated weft application.
  • the Verbolzstelle 12 is attached to the upper flange of the telescopic section.
  • a corresponding Verbolzstelle but also be provided on the lower flange or on the side walls.
  • FIG. 3 is the joint area between the profile tube 10 and Verbolzstelle 12 shown enlarged.
  • the intended in the region of this joint weld 16 results from the enlarged view according to FIG. 4 ,
  • This is a butt joint in the form of an I-seam.
  • a compound as a 1-seam (butt weld) has a significantly lower negative metallurgical influence on the component to be produced by the welding process.
  • the notch case is favorably influenced by the geometric design of the weld. This results in a significantly higher fatigue strength.
  • the circular Verbolzteller is divided into different thickness ranges.
  • the thickness of the bolt plate corresponds to that of the sheet thickness of the surrounding profile tube 10. This thickness retains the bolt plate for a region 18.
  • the bolt plate has approximately three times the thickness. This area is shown here at 20. From the region 18 of lesser thickness to the region 20 of greater thickness, the thickness increases steadily in a transition region 22.
  • the advantages of this solution are a very favorable flow of forces. Due to the butt joint and the notch-free seam transition as well as the low residual weld stress, a weld with very good mechanical properties is created here.
  • the laser seam is aftertreated. This is done by at least one side smoothing the laser weld. This smoothing can be done, for example, thermally by laser post-treatment with an unsharp laser. Other smoothing methods, such as, for example, mechanical smoothing methods, can alternatively be used.
  • the Verbolzteller is performed circular.
  • any other form of the bolted plate is possible, that is, for example, a polygonal symmetrical or asymmetrical shape.
  • the arrangement and geometric configuration of the recess 14 is not limited to the embodiment described above within the scope of the invention. Again, any shapes can be realized within the scope of the invention.
  • the position of the receiving points of the bolt is not necessarily central, but may also vary within the scope of the invention.
  • the required gap in the laser beam welding or laser hybrid welding can be achieved on the one hand by machining the Verbolztellers with the appropriate Tolleranzen and on the other hand at the hole in the tube of the telescopic section by laser cutting.
  • the profile tube and the bolt plate are advantageously made of a fine grain structural steel with a high yield strength. Due to the use of laser beam welding or laser hybrid welding, no filler metal is needed, because the base material alone is melted and forms the weld. Thus, the yield strength of the material can be fully utilized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Claims (6)

  1. Tronçon télescopique constitué d'un tube profilé (10) avec au moins un emplacement de boulonnage (12) en tôle présentant un évidement (14),
    caractérisé en ce que la tôle formant l'emplacement de boulonnage (12) est répartie en des zones d'épaisseur différentes, où à ses zones de bord (18), celle-ci correspondant à l'épaisseur de la tôle du tube profilé entourant (10) et est soudée dans le tube profilé (10) par une soudure en bout au moyen d'un soudage au laser ou d'un soudage hybride au laser.
  2. Tronçon télescopique selon la revendication 1, caractérisé en ce que la tôle formant l'emplacement de boulonnage (12) est réalisée dans le même matériau que le tube profilé (10), cependant au voisinage de l'évidement (14), elle est réalisée en une épaisseur comparativement plus grande.
  3. Tronçon télescopique selon la revendication 1, caractérisé en ce que la tôle formant l'emplacement de boulonnage (12) est réalisée en un autre matériau que le tube profilé.
  4. Tronçon télescopique selon l'une des revendications précédentes, caractérisé en ce que l'emplacement de boulonnage (12) est en forme de cercle, et son évidement (14) servant à la réception d'un boulon est disposé sensiblement au milieu.
  5. Tronçon télescopique selon l'une des revendications 1 à 4, caractérisé en ce que la tôle formant l'emplacement de boulonnage (12) présente une épaisseur qui augmente vers son évidement (14).
  6. Tronçon télescopique selon l'une des revendications 1 à 5, caractérisé en ce que la tôle formant l'emplacement de boulonnage (12), en partant de l'épaisseur de tôle du tube profilé (10), s'épaissit continuellement vers l'épaisseur plus grande de la zone médiane en forme d'assiette autour de l'évidement (14).
EP20070024227 2007-02-14 2007-12-13 Coup de télescopage Ceased EP1958917B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200720002203 DE202007002203U1 (de) 2007-02-14 2007-02-14 Teleskopschuß

Publications (2)

Publication Number Publication Date
EP1958917A1 EP1958917A1 (fr) 2008-08-20
EP1958917B1 true EP1958917B1 (fr) 2013-02-13

Family

ID=39469516

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070024227 Ceased EP1958917B1 (fr) 2007-02-14 2007-12-13 Coup de télescopage

Country Status (2)

Country Link
EP (1) EP1958917B1 (fr)
DE (1) DE202007002203U1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009012772A1 (de) 2009-03-13 2010-09-16 Koki Technik Seating Systems Gmbh Fahrzeugsitz
DE202010013544U1 (de) * 2010-09-23 2012-01-19 Liebherr-Werk Ehingen Gmbh Teleskopschuß und Kran mit Teleskopschuß

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4018222A1 (de) * 1990-06-07 1991-12-12 Krupp Industrietech Teleskopausleger mit kupplungsvorrichtung fuer ausschiebeanordnung
DE19836085A1 (de) * 1997-09-11 1999-04-01 Mannesmann Ag Verfahren zur Herstellung eines Teleskopschusses für Teleskopausleger eines Kranes
EP1055635B1 (fr) * 1999-04-29 2005-01-12 Terex-Demag GmbH & Co. KG Grue avec une flèche télescopique
DE10113471B4 (de) * 2001-03-19 2005-02-17 Highyag Lasertechnologie Gmbh Verfahren zum Hybridschweißen mittels eines Laserdoppelfokus

Also Published As

Publication number Publication date
EP1958917A1 (fr) 2008-08-20
DE202007002203U1 (de) 2008-06-26

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