EP1932642B1 - Procédé d'assemblage de pièces en bois - Google Patents

Procédé d'assemblage de pièces en bois Download PDF

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Publication number
EP1932642B1
EP1932642B1 EP06025644A EP06025644A EP1932642B1 EP 1932642 B1 EP1932642 B1 EP 1932642B1 EP 06025644 A EP06025644 A EP 06025644A EP 06025644 A EP06025644 A EP 06025644A EP 1932642 B1 EP1932642 B1 EP 1932642B1
Authority
EP
European Patent Office
Prior art keywords
frame
oscillation
contact surfaces
parts
wooden
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.)
Not-in-force
Application number
EP06025644A
Other languages
German (de)
English (en)
Other versions
EP1932642A1 (fr
Inventor
Beat Bruderer
Peter Eugster
Jörg Vetter
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.)
Fentech AG
Branson Ultraschall Niederlassung der Emerson Technologies GmbH and Co OHG
Original Assignee
Fentech AG
Branson Ultraschall Niederlassung der Emerson Technologies GmbH and Co OHG
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 Fentech AG, Branson Ultraschall Niederlassung der Emerson Technologies GmbH and Co OHG filed Critical Fentech AG
Priority to DE502006006084T priority Critical patent/DE502006006084D1/de
Priority to AT06025644T priority patent/ATE456991T1/de
Priority to EP06025644A priority patent/EP1932642B1/fr
Priority to PCT/EP2007/010813 priority patent/WO2008071390A1/fr
Publication of EP1932642A1 publication Critical patent/EP1932642A1/fr
Application granted granted Critical
Publication of EP1932642B1 publication Critical patent/EP1932642B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
    • B27M3/0013—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles
    • B27M3/002—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles characterised by oblong elements connected at their ends

Definitions

  • the invention relates to a method for joining wood parts according to the preamble of claim 1.
  • Such methods are used in many fields, especially in the production of frames such as sash or window frame for windows and doors or blinds shutters of frame parts and any other parts and of Components for wooden facades and conservatories from smaller individual parts.
  • a generic method in which, for example, frame parts are first completely painted, in particular, in each case a topcoat, preferably an acrylic paint is applied. Then the topcoat is softened at the contact surfaces of the parts by means of a solvent and finally the Contact surfaces of the parts to be joined pressed against each other, whereupon the topcoat is allowed to harden.
  • This method in principle, considerably facilitates the production of the frames, since only the substantially smaller frame parts have to be painted.
  • the precision requirements in the production of the frame parts in the area of the contact surfaces are very high.
  • the structuring of the contact surfaces by means of grooves and cones may mean that some surfaces cut across the fiber (so-called end grain wood) lie on the surface of the frame, where water can penetrate and cause corrosion.
  • thermosetting material reaches a temperature of 150 ° C to 350 ° C and melts. After a holding time of up to 15 seconds, the thermosetting material is allowed to cure, resulting in a load-bearing connection.
  • duroplastic material for example resin or a polymer such as polyurethane
  • the invention is based on the object to improve the known generic method to the effect that facilitates its execution and the requirements for accuracy in the formation of the wooden parts, in particular their contact surfaces are smaller.
  • the composite component produced by the process should be very resistant to water penetration and corrosion in general.
  • a significant advantage is that only contact surfaces are aligned transversely to the fiber, but which are completely covered, so that no transverse to the fiber surface of one of the wood parts is located on the surface of the component. So there is no so-called end grain at the junction.
  • end grain wood also offers less resistance to mold, blue stain and insects, attacks by these pests are considerably more difficult in the case of components produced by the process according to the invention, so that it may be possible to dispense with the use of environmentally harmful paint additives such as fungicides, insecticides and blueness.
  • the inventive method is used to connect two or more usually elongated wooden parts. It will be further illustrated by the example of the connection of four mitred frame parts to an outer frame, e.g. the frame of a window sash or a frame, explained in which frame parts are simultaneously connected in pairs. However, the possible applications of the method according to the invention go beyond that.
  • Fig. 1 . 2 show frame parts 1a, 1b and 1a-d.
  • the four elongated, lying in a frame plane frame parts 1a-d form a frame 2, which surrounds an opening.
  • Each of the frame parts 1a-d is cut to length from a single wood profile, which may be in one piece or consist of a plurality of parallel sub-profiles which are connected to one another, for example adhesively bonded.
  • the fiber extends in each case substantially in the longitudinal direction.
  • the frame parts 1a-d thus have - apart from two end sections - over their length in each case the same constant cross-sections.
  • each of the frame parts 1a-d is provided with flat contact surfaces 3, 4 which run in miter, in particular perpendicular to the frame plane and obliquely in opposite directions, in particular 45 ° to the longitudinal direction of the respective frame part.
  • the contact surfaces of all frame parts 1a-d are the same in shape and dimensions. They are each transverse - in the present case at 45 °, ie obliquely - aligned to the longitudinal direction of the frame parts 1a-d and thus to the fiber.
  • the frame parts are each completely painted, that is covered with a lacquer layer of primer, primer and topcoat, wherein the Topcoat is cured at least so far that he is touched.
  • the topcoat may be, for example, an acrylic varnish.
  • the frame parts 1a-d are now ( Fig. 2 ) are arranged so that a first contact surface 3 of each of the frame parts 1a, 1b, 1c, 1d each congruent to a second contact surface 4 of the following on the same frame part 1b; 1c; 1d; 1a abuts, beginning with the first contact surface 3 of the first frame part 1a and the second contact surface 4 of the second frame part 1b and ending with the first contact surface 3 of the fourth frame part 1d and the second contact surface 4 of the first frame part 1a.
  • the frame parts 1a-d are attached to pairs of respectively engaging at the end portions brackets 5a-d, in which the frame parts 1a-d, for example by clamping frictionally or positively secured, such that each contact surfaces 3, 4 successive frame parts abut each other ,
  • the brackets 5a-d exert on the frame parts 1a-d an elastic force directed against the center of the frame 2, so that abutting contact surfaces 3, 4 of successive frame parts are pressed together with a welding pressure of up to 3N / mm 2 .
  • the holders 5a-d are then also impressed with translatory oscillations during a welding phase which are transmitted to the respective frame part.
  • the vibrations are in each case coordinated so that the abutting contact surfaces 3, 4 successive frame parts each relative to one another a certain vibration direction, which is parallel to the contact surfaces, perform the following cyclic Reibschwingung, ie the contact surfaces rub against each other.
  • This will be vibrations with frequencies below 500Hz, preferably between 100Hz and 240Hz used with amplitudes between 0.2mm and 3mm.
  • the two brackets that engage a frame part for example, the brackets 5a on the frame part 1a, are usually offset by separate drives in vibration. However, the drives are tuned to each other in terms of frequency and amplitude, and preferably also in terms of phase.
  • the welding pressure and the friction vibrations are maintained over a welding time of between 0.2s and 10s. Because of the relatively low frequencies, heat is not generated to any significant extent at the locations where the respective frame part is held, so that no softening of the topcoat occurs. Because of the orientation of the frictional vibrations of the contact surfaces parallel to the same but relatively large amplitudes can be selected so that at the contact surfaces by friction between them quickly relatively much heat is released.
  • the topcoat is melted in such a way that in case of deviations of the contact surfaces of the ideal geometry -. due to uneven layer thickness of the paint - where there is an excess, a stronger melting takes place. This automatically compensates for deviations, which reduces the accuracy requirements and allows larger tolerances.
  • the vibrations of the holders 5a-d are terminated at the same time and at most maintain a holding pressure during a holding time of up to 10 seconds, which preferably corresponds to the welding pressure equivalent. Subsequently, the compounds are sufficiently strong and the brackets 5a-d are released and the frame 2 removed. Finally, the topcoat is allowed to cure completely, which may take 48 hours, for example.
  • the vibrations of the pairs of brackets 5a-d can, as in Fig. 2 indicated, aligned and tuned so that the frame parts 1a-d each perform about a sine following vibrations of equal frequencies and amplitudes in the longitudinal direction, with tuning their phases such that when the overhead first frame part 1a moves to the left, the left second Frame part 1b moves down, the underlying third frame part 1c to the right and the right fourth frame part 1d upwards.
  • the holders 5a-d to be moved so that the frame parts 1a-d are each subjected to translational vibrations in the frame plane perpendicular to the longitudinal direction.
  • the oscillations which in turn are of equal frequency and amplitude, must be adjusted in phase so that the upper frame part 1a and the lower frame part 1c oscillate against each other, ie both move towards or away from the frame center, and likewise the two lateral frame parts 1b, 1d.
  • the lateral frame parts 1b, 1d must each move towards them and vice versa.
  • the holders 5a-d as in Fig. 4 indicated in each case impose a perpendicular to the frame plane aligned vibration. Again the vibrations have equal frequencies and amplitudes.
  • the phases are chosen so that the directions of movement of the upper frame part 1a and the lower frame part 1c match, as well as the directions of movement of the lateral frame parts 1b, 1d.
  • the direction of movement of the last-mentioned pair of frame parts 1b, 1d is always opposite that of the first-mentioned pair of frame parts 1a, 1c, so that the relative movements of the abutting contact surfaces 3, 4 are each maximum.
  • the two holders swing with different phase, for example, each with a phase shift of 180 °, so that the corresponding frame part as a whole performs a rotational movement, for example, about its center of gravity, while the friction vibrations of the contact surfaces are practically translational.
  • the described procedures can be carried out with slight deviations even if the miter deviates from 45 °.
  • the amplitudes must be adjusted and selected differently in the basic versions in the lateral frame parts 1b, 1d than in the upper frame part 1a and the lower frame part 1c. They may also be mounted on frames of more than four frame parts, e.g. hexagonal or octagonal frames are applied.
  • the direction of oscillation may be located in the appropriate plane and does not need to be constant.
  • other non-translatory vibrations can be selected, e.g. in that the individual holders oscillate non-translationally and the corresponding contact surfaces have a corresponding, e.g.
  • the contact surfaces may also be structured, e.g. such that they are translation invariant in one direction only. In this case, the direction of oscillation must correspond to this direction.
  • Fig. 5 An example of such contact surfaces is Fig. 5 refer to.
  • the frame 2 is additionally provided with a central vertical strut 6 which is connected to the upper frame part 1a and the lower frame part 1c, respectively.
  • the contact surface 3 '( Fig. 6 ) on the upper frame part 1a and the contact surface 4 'at the upper end of the strut 6 are thereby congruent, such that they are translation invariant in the longitudinal direction of the frame part 1a.
  • the contact surface 3 ' is simply formed by a part of the inner surface of the frame part 1 a and is in each case parallel to the fiber, while the contact surface 4' of the strut 6 is at the end and perpendicular to the longitudinally extending fiber.
  • the contact surface 4 'of the strut 6 is set to produce the connection with respect to the contact surface 3' of the frame part 1a in a frictional vibration which is parallel to the longitudinal direction of the latter.
  • the connection between the frame part 1c and the strut 6 is made.
  • the attachment of the strut 6 can take place after the production of the connections between the frame parts 1a-d, but it may also be possible to make them simultaneously.
  • the frame parts 1a-d as in connection with Fig. 2 connected, so the strut 6 can be pressed against the frame parts 1a, 1c and held stationary at the same time.
  • a transverse strut 7 can then be connected in a separate operation in the same way with the frame part 1d and the strut 6.
  • several such cross struts can be attached at the same time.
  • a particular aesthetic effect can be achieved if the frame parts 1a-d are sequentially cut from a profile 8 and then connected to a frame 2, that they follow each other in the same order and corresponding orientation. For this purpose, only where then the corners of the frame 2 should come to rest, appropriate angle pieces 9 are sawn out of the profile 8 or -gefract. The grain then runs through at the corners essentially. Only at one corner - in Fig. 8 bottom left - this is not the case since there the meet opposite ends of the profile 8. Of course, the aesthetic effect only occurs if the grain remains visible. This is certainly the case when the lacquer layer is transparent, in particular colorless.
  • the frame 2 is therefore very well protected and it can hardly penetrate water into the wood and also an approach of mold or blueness or attack by insects is very difficult, so too especially environmentally friendly paints which contain no insecticides, fungicides and blueness.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Joining Of Corner Units Of Frames Or Wings (AREA)

Claims (19)

  1. Procédé pour assembler au moins une première pièce en bois qui présente une surface de contact (3 ; 3') avec au moins une deuxième pièce en bois qui présente à une extrémité une surface de contact (4 ; 4') orientée transversalement à une direction longitudinale, la première pièce en bois et la deuxième pièce en bois étant chacune recouvertes essentiellement entièrement par une couche de laque qui comprend une couche extérieure de laque de finition durcie, caractérisé en ce que la fibre de la deuxième pièce en bois s'étend essentiellement dans la direction longitudinale et la surface de contact (4 ; 4') coupe la fibre, et que les surfaces de contact (3 ; 3') sont congruentes et invariantes en translation au moins dans une direction de vibration et en ce que, pour réaliser l'assemblage, la surface de contact (4 ; 4') de la deuxième pièce en bois est posée sur la surface de contact (3 ; 3') de la première pièce en bois de manière coïncidente et pendant une phase de soudage une vibration est imprimée à au moins une des pièces en bois de telle manière que la surface de contact dernière nommée (3 ; 3') est soumise, par rapport à la surface de contact première nommée (4 ; 4'), à une vibration à friction dans la direction de vibration à une fréquence de 500Hz maximum.
  2. Procédé selon la revendication 1, caractérisé en ce que les surfaces de contact (3, 4) sont chacune orientées essentiellement transversalement, en particulier en biais ou perpendiculairement, à la fibre de la pièce en bois.
  3. Procédé selon la revendication 1, caractérisé en ce qu'au moins une surface de contact (4') est orientée au moins en partie perpendiculairement à la fibre de la pièce en bois.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la vibration à friction est chaque fois produite en soumettant au moins l'une des pièces en bois à une vibration translatoire appropriée.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que les surfaces de contact (3, 4) sont planes.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que quatre pièces en bois allongées réalisées sous la forme de parties de cadre (1a, 1b, 1c, 1d) sont assemblées entre elles par paires de telle manière qu'elles forment un cadre (2) fermé situé dans un plan de cadre, entourant une ouverture, et les surfaces de contact (3, 4) sont orientées chacune essentiellement perpendiculairement au plan de cadre et de biais par rapport à la direction longitudinale de la partie de cadre respective (1a, 1b, 1c, 1d).
  7. Procédé selon la revendication 6, caractérisé en ce que les assemblages entre les quatre parties de cadre (1a, 1b, 1c, 1d) sont réalisés simultanément.
  8. Procédé selon les revendications 6 et 7, caractérisé en ce que la vibration de chaque partie de cadre (1a, 1b, 1c, 1d) est parallèle à sa direction longitudinale.
  9. Procédé selon les revendications 6 et 7, caractérisé en ce que la vibration de chaque partie de cadre (1a, 1b, 1c, 1d) est parallèle au plan du cadre et perpendiculaire au moins de manière approchée à sa direction longitudinale.
  10. Procédé selon les revendications 6 et 7, caractérisé en ce que la vibration de chaque partie de cadre (1a, 1b, 1c, 1d) est perpendiculaire au plan du cadre.
  11. Procédé selon l'une des revendications 6 à 10, caractérisé en ce que les parties de cadre (1a, 1b, 1c, 1d) sont coupées successivement d'un profilé (8) et assemblées successivement dans le même ordre pour réaliser le cadre (2).
  12. Procédé selon la revendication 11, caractérisé en ce que la couche de laque est transparente, de préférence incolore.
  13. Procédé selon l'une des revendications 1 à 12, caractérisé en ce que la laque de finition est une laque acrylique.
  14. Procédé selon l'une des revendications 1 à 13, caractérisé en ce que la fréquence de la vibration à friction est comprise entre 100Hz et 240Hz.
  15. Procédé selon l'une des revendications 1 à 14, caractérisé en ce que l'amplitude de la vibration à friction est comprise entre 0,2mm et 3mm.
  16. Procédé selon l'une des revendications 1 à 15, caractérisé en ce que la durée de la phase de soudage d'un temps de soudage est comprise entre 0,2s et 10s.
  17. Procédé selon l'une des revendications 1 à 16, caractérisé en ce que les surfaces de contact (3, 4 ; 3', 4') sont pressées l'une contre l'autre pendant la phase de soudage avec une pression de soudage de 3N/mm2 maximum.
  18. Procédé selon l'une des revendications 1 à 17, caractérisé en ce que les surfaces de contact (3, 4 ; 3', 4') sont pressées l'une contre l'autre avec une pression de maintien après la fin de la phase de soudage pendant un temps de maintien ne dépassant pas de préférence 10s.
  19. Procédé selon les revendications 17 et 18, caractérisé en ce que la pression de maintien correspond essentiellement à la pression de soudage.
EP06025644A 2006-12-12 2006-12-12 Procédé d'assemblage de pièces en bois Not-in-force EP1932642B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE502006006084T DE502006006084D1 (de) 2006-12-12 2006-12-12 Verfahren zum Verbinden von Holzteilen
AT06025644T ATE456991T1 (de) 2006-12-12 2006-12-12 Verfahren zum verbinden von holzteilen
EP06025644A EP1932642B1 (fr) 2006-12-12 2006-12-12 Procédé d'assemblage de pièces en bois
PCT/EP2007/010813 WO2008071390A1 (fr) 2006-12-12 2007-12-11 Procédé d'assemblage d'éléments en bois

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06025644A EP1932642B1 (fr) 2006-12-12 2006-12-12 Procédé d'assemblage de pièces en bois

Publications (2)

Publication Number Publication Date
EP1932642A1 EP1932642A1 (fr) 2008-06-18
EP1932642B1 true EP1932642B1 (fr) 2010-02-03

Family

ID=37964629

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06025644A Not-in-force EP1932642B1 (fr) 2006-12-12 2006-12-12 Procédé d'assemblage de pièces en bois

Country Status (4)

Country Link
EP (1) EP1932642B1 (fr)
AT (1) ATE456991T1 (fr)
DE (1) DE502006006084D1 (fr)
WO (1) WO2008071390A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105904560A (zh) * 2016-04-25 2016-08-31 宁国市鼎轩文化创意有限公司 一种耐腐蚀实木画框的生产工艺

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH692091A5 (de) * 1994-07-01 2002-01-31 Woodwelding Ag Verfahren zum Zusammenfügen von Teilen aus Holz oder aus holzähnlichen Materialien.
WO1996022875A1 (fr) * 1995-01-27 1996-08-01 Andersen Corporation Joints de fenetres et de portes soudes par vibration, procede et appareil de fabrication de ceux-ci
DE59605998D1 (de) * 1995-04-20 2000-11-23 Fentech Ag Zug Verfahren zum Verbinden von Holzteilen
DE19938099A1 (de) * 1999-08-12 2001-02-15 Exama Maschinen Gmbh Mehrkopf-Reibschweissverfahren und Vorrichtung zur Durchführung des Verfahrens
CA2470631C (fr) * 2001-12-18 2011-05-24 Balz Gfeller Procede pour lier deux corps
DE10332824A1 (de) * 2003-07-18 2005-02-10 Multi Orbital Systems Gmbh Mehrkopf-Reibschweißverfahren und Vorrichtung zur Durchführung des Verfahrens

Also Published As

Publication number Publication date
WO2008071390A1 (fr) 2008-06-19
DE502006006084D1 (de) 2010-03-25
ATE456991T1 (de) 2010-02-15
EP1932642A1 (fr) 2008-06-18

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