RU2381338C2 - Method of manufacturing of bonded building timber - Google Patents

Abstract

FIELD: construction industry.

SUBSTANCE: invention refers to methods of manufacturing of bonded building timbers. Method includes assembly of package of machined boards with displacement in relation to each other with formation of daps on one side and protrusions on the other side, bonding agent application, fixation of boards among themselves, pressing of package. Package assembly is performed using blanks for timber in form of machined boards with stop from side of plane of bonding agent application. Fixation of boards among themselves is performed with stop with locks formation preventing bonding agent extrusion on one or two flanks of bonded surface.

EFFECT: upgrades timber quality, reduces labour intensity upon manufacturing.

3 cl, 4 dwg, 3 ex

Description

The invention relates to construction, and in particular to methods for the manufacture of glued wooden structural beams required for the assembly of various building structures.

A known method of manufacturing a wooden glued carrier element, including assembling a package of boards with adhesive, fixing the boards together, pressing the package, selecting grooves and transverse holes, installing shortened inserts with adhesive in the grooves, and in the transverse holes of the nails with subsequent removal of the compression forces to full glue polymerization is carried out after pressing the boards of the package (see USSR Author's Certificate No. 1716035, IPC Е04С 3/12. Bull. No. 8 of 02.29.1992).

The known solution makes a certain simplification of the manufacturing process, in which the selection of the transverse holes and the installation of nails in them is carried out after pressing the boards of the package, followed by the removal of the compression forces until the glue polymerizes.

A disadvantage of the known solution is the great complexity of manufacturing, including the selection of grooves of various sizes and shapes in separate boards prior to their installation in the package and the installation of inserts during assembly of the package with additional fixing of the boards in the package with flat diaphragms.

Closest to the claimed technical solution is a method of manufacturing a glued wooden building beam, comprising assembling a package of boards with glue, pressing the package in, fixing the boards together, and assembling the package by sequentially installing the boards with offset relative to each other with the formation of grooves on one side and protrusions on the other side, while the press-fit is performed in stages, starting from the first two boards, and the boards are fixed after each stage of the press-fit by installing it in planes perpendicular to the direction of the fibers of the boards, with an inclination to their planes (See Patent RU No. 2268969, IPC E04C 3/12. Published 2004.07.16).

The known solution produces a certain saving of materials in the form of wood and glue, and also creates certain conditions of the manufacturing process by sequentially installing boards with offset relative to each other with the formation of grooves on one side and protrusions on the other side.

A disadvantage of the known solution is the great complexity of manufacturing, including the precise positioning of the workpiece during assembly and gluing by phasing the package, installing the pins in each stage board in planes perpendicular to the direction of the fibers of the boards, with an inclination to their planes.

The technical result of the proposed solution is to improve the quality of manufacturing of wooden glued building timber while reducing the complexity of its manufacture and material consumption during the assembly of structures.

The essence of the technical solution lies in the fact that in the method of manufacturing a wooden glued building beam, which includes assembling a package of milled boards with offset relative to each other with the formation of grooves on one side and protrusions on the other side, applying glue, fixing the boards together, pressing the package, and the assembly of the package is performed from blanks for timber in the form of milled boards with an emphasis on the side of the plane of application of glue, while fixing the boards between each other is performed with emphasis with the formation of locks, one Nom or two flanks of the glued surface interfere with extrusion of glue.

When assembling the beam, the boards after applying glue are laid on the opposite side from their own stop on the previous board to its stop and the next board is positioned with the required accuracy while pressing the package.

Boards during the assembly of the beam are laid on the flanks of the glued beam, in pairs, focusing point-blank with the creation of two locks on the flanks of the glued surface.

The proposed method is illustrated by drawings, which depict a phased assembly of glued building timber.

Figure 1 shows a cross section of a workpiece for a bar in the form of a milled board with emphasis.

Figure 2 shows a cross section of the assembly of a package of boards with one lock on the surface to be glued.

Figure 3 shows a cross section of a glued building beam after finishing.

Figure 4 shows a cross section of the assembly of a package of boards in pairs with two locks.

The method is as follows.

Example 1

For the manufacture of wooden glued building timber, several boards are taken, for example, 5 pieces in the form of a finished profile. Board 1 is installed in the fixture and apply horizontal forces P ₀ . On the board 1, set the board 2, with a pre-applied layer of glue, offset from the board 1, and apply horizontal forces P ₀ and vertical forces P _{1 to it} . They press in, then drill holes at an angle of 40 ° to the plane of boards 1 and 2, into which square pins are pressed along the entire length of boards 1 and 2, and fix them. Then set the board 3 with a pre-applied layer of glue, offset relative to the board 2, with the formation of the protrusion and groove, apply horizontal forces P ₀ and vertical forces P _{1 to it} , press-fit, then drill holes at an angle of 40 ° to the planes of the boards 2 and 3, square pins are pressed in along the entire length of the boards 2 and 3, thus connecting and fixing boards 2 and 3. Thus, the same operations are performed when installing the next board 4. The face board 5 is glued to the board 4 using a layer of glue. The performance of a link from two collector operators on pneumatic presses in m ³ per shift of a glued wooden construction timber is not large.

Example 2

For the manufacture of wooden glued building timber, several blanks are taken in the form of milled boards with an emphasis on the side of the glue application plane in the form shown in Figure 1, for example, 5 pieces in the form of a finished profile, are milled on three sides to the entire width, and on one wide on the plane of glue application, at the height of the protrusion, the board is not milled and an emphasis 6 is created, which fix the boards together, create locks on one or two flanks of the surface to be glued, compress the bag and prevent the glue from extruding glue, this they give adhesion to the strength of the adhesive joint [3]. The completely milled side of the board 2 (Option 2) is stacked with the opposite side from its own stop on the previous board 1 to the stop 6, after applying glue 7, and provide the required accuracy of positioning of the next board 2 while pressing the package.

The completely milled side of the board 3 is laid, on the opposite side from its own stop, on the previous board 2 to the stop 6, after applying glue 7, and the required accuracy of positioning of the next board 3 is provided while pressing the bag. Similar signs are carried out when installing the following boards 4 and 5, and the boards are laid in pairs on the flanks of the glued timber in pairs, one-on-one in emphasis with the creation of two locks on the flanks of the glued surface. Next, the package is crimped with a vertical force P ₂ and a horizontal force P ₃ until the glue is fully polymerized.

In this case, when compressing the package with locks, they prevent the extrusion of glue and increase the adhesion of the strength of the adhesive joint.

Example 3

The manufacture of wooden glued building timber is similar to the conditions given in Example 2.

When assembling, the boards are laid on the flanks of the glued beam in pairs, stop in focus with the creation of two locks on the flanks of the glued surface (see Figure 4).

Finishing fine-tuning of wooden glued building timber is carried out to the specified sizes.

The performance of the link of the two operators of collectors on pneumatic presses in m ³ per shift of wooden glued building timber significantly increases compared to the prototype.

The application of the claimed invention will improve the quality of the manufactured wooden glued building timber in the form of adhesion of adhesive strength, simplify the production process, reduce the complexity of its manufacture, increase the productivity of installation work.

Sources used

1. USSR copyright certificate No. 1716035. IPC E04C 3/12. Bull.no.8 from 02.29.1992.

2. Patent RU No. 2268969. IPC E04C 3/12. Posted on 2004.07.16.

3. Kulikov V.A., Chubov A.B. Technology of glued materials and plates: Textbook for universities. M .: Forest industry, 1984. - S. 60-83.

Claims (3)

1. A method of manufacturing a wooden glued building beam, comprising assembling a package of milled boards with offset relative to each other with the formation of grooves on one side and protrusions on the other side, applying glue, fixing the boards together, pressing the package, characterized in that the package is assembled from blanks for timber in the form of milled boards with an emphasis on the side of the glue application plane, while fixing the boards between themselves is carried out with emphasis with the formation of locks on one or two flanks of the surface to be glued spikes that prevent the extrusion of glue. 2. The method according to claim 1, characterized in that when assembling the timber, the boards after applying glue are laid on the opposite side from their own stop on the previous board to the stop and the next board is positioned with the required accuracy while pressing the package. 3. The method according to claim 1 or 2, characterized in that the boards during assembly are laid on the flanks of the glued beam in pairs in an emphasis with the creation of two locks on the flanks of the glued surface.

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