RU2415749C2 - Method of producing glued sawn timbers from logs (versions) - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to woodworking. In compliance with proposed versions, butt-ended logs are sawn into blanks with rectangular or square cross section, or, correspondingly, two or four isosceles triangles or trapezoids. Then said blanks red dried glued together by inclined sides, and, thereafter, they are sawn into two identical-width blanks to be glued together by their inclined sides.

EFFECT: wide range of processed log diametres, higher yield of timber and its quality.

4 cl, 15 dwg

Description

The invention relates to the woodworking industry and can be used in the technology of lumber production.

A known method of producing glued lumber from thin-sized (up to 14 cm in diameter) logs up to 4 m long by cutting them onto trapezoidal section boards, which are then dried, planed and glued along beveled edges into a continuous carpet. Next, the carpet is cut into lumber or boards of the required width [Pischik D.I. Processing of fine raw materials [Text]. / D.I. Pischik // Tree, No. 4, 2005, - p. 48-51].

As a prototype, a method for producing glued sawn timber from logs (its variants) was selected, including their cylindering, longitudinal cutting into blanks with a cross section in the form of a regular hexagon or a regular octagon, which are cut into blanks with a cross section in the first case in the form of a pentagon and two rectangular triangles, in the second case - in the form of a hexagon and four rectangular triangles. The resulting assortments are dried and then glued, combining sawn surfaces into blocks of rectangular cross section, which subsequently can be sawn into edged lumber of the required size [ed. St. USSR 490651, MKI ³ B27D 1/00. A method of obtaining glued blanks of radial sawing. / V.A. Chervinsky. - Publ. 11/05/07, bull. No. 41].

A disadvantage of the known methods for producing edged lumber is the small thickness of the processed logs, insufficiently high volumetric yield of lumber, the possibility of reducing the quality of lumber during their operation.

The invention solves the problem of increasing the range of thicknesses of processed logs and volumetric output of lumber, as well as their qualitative characteristics.

This is achieved by the fact that the cutting of logs into blanks with a cross section is carried out in the form of a regular hexagon, and then they are sawn into blanks with a cross section in the form of a rectangle and two isosceles triangles, which after drying are glued to each other with inclined sides, the resulting glued blank having the shape of a parallelogram is sawn into two equal blanks in the form of rectangular trapezoid, which is then glued to the inclined sides.

This goal can be achieved by the fact that the cutting of logs is carried out on blanks with a cross section in the form of a regular octagon, and then they are sawn into a central beam with a cross section in the form of a square and four side blanks with a cross section in the form of isosceles triangles, which after drying glued together with inclined sides, the resulting workpiece in the form of a parallelogram is sawn into two equal blanks in the form of rectangular trapezoid, which is then glued to the inclined sides.

This goal can also be achieved by the fact that the logs are cut into blanks with a cross section in the form of a regular dodecagon, and then they are cut into a central beam with a cross section in the form of a square and four side blanks with a cross section in the form of isosceles trapezoidal glue which after gluing with each other on the inclined sides, the resulting glued workpiece in the form of a parallelogram is sawn into two equal blanks in the form of rectangular trapezoid, which is then glued to the inclined sides us.

Figure 1 shows a cross section of a workpiece in the form of a regular hexagon; figure 2 - sawn billet in figure 1; figure 3 - collected in the form of a parallelogram of the workpiece in figure 2; figure 4 - sawn into two equal parts of the workpiece in figure 3; figure 5 - assembled and glued into lumber of rectangular cross section of the workpiece of figure 4; figure 6 is a cross section of the workpiece in the form of a regular octagon; Fig.7 - sawn blank in Fig.6; in Fig.8 - assembled and glued into a block in the form of a parallelogram of the workpiece in Fig.7; Fig.9 - sawn into two equal parts of the workpiece in Fig.8; figure 10 - collected and glued into lumber of rectangular cross section of the workpiece in figure 9; figure 11 is a cross section of the workpiece in the form of a regular dodecagon; in Fig.12 - sawn billet in Fig.11; in Fig.13 - assembled and glued into a block in the form of a parallelogram of the workpiece in Fig.12; on Fig - sawn into two equal parts of the workpiece in Fig.13; on Fig - assembled and glued into lumber of rectangular cross-section of the workpiece in Fig.14.

To implement the method, non-cylindrical or cylindrical logs are sawn into billets with a cross section in the form of regular hexagons, octagons and twelve hexagons, which are then sawn in the first case into billets with a cross section in the form of a rectangle and two isosceles triangles (Fig. 1, Fig. 2). Isosceles triangles are dried and glued to each other with inclined sides (Fig. 3), the resulting glued blank with a cross-section in the form of a parallelogram is sawn into two equally wide blanks of a complex cross-sectional profile (Fig. 4), which are glued together with inclined sides (Fig. 5) ) In the second case - on the workpiece with a cross section in the form of a square and four isosceles triangles (Fig.6, Fig.7), which are dried and glued to each other with inclined sides (Fig.8). The obtained glued billet in the form of an elongated parallelogram is sawn into two equal-in-width billets of a complex cross-section profile (Fig. 9), which are glued to the inclined sides (Fig. 10). In the third case, on blanks with a cross-section in the form of a square and four isosceles trapezoid with upper bases equal in length to the sides (Fig. 11, Fig. 12), which are dried and glued together with the inclined sides (Fig. 13). The obtained glued billet with a cross section in the form of an elongated parallelogram is sawn into two equal-in-width billets of a complex cross-section profile (Fig. 14), which are glued to the inclined sides (Fig. 15).

The options differ in the number of angles in the cross section of the initial blanks - prisms - hexagonal, octagonal, dodecagonal; the cross-sectional shape of the central beam: in the first version it is a rectangle, in the second and third - squares; the number and shape of cross-sections of the side blanks: in the first and second versions - these are isosceles triangles (two in the first and four in the second version), in the third version - these are isosceles trapezoid in the amount of four pieces, the number and shape of the cross-sections of the gluing elements included in the composition blocks of rectangular section.

The resulting glued blocks can be subsequently cut into lumber of the right size. The proposed method allows to obtain increased compared with the known method of cutting the volumetric yield of lumber.

Claims (3)

1. A method of producing glued sawn timber from logs, including cylindering, cutting into blanks with a cross section in the form of a regular hexagon, drying the resulting side blanks and gluing them into blocks of rectangular cross section, characterized in that the logs obtained after cutting of a blank with a cross section in the form of a regular the hexagon is further cut into blanks with a cross section in the form of a rectangle and two isosceles triangles, which after drying are glued to each other with inclined sides, Acquiring glued blank is sawn in the form of a parallelogram into two equal rectangular blank in the form of trapezoids, which are then glued sloping sides. 2. A method of producing glued sawn timber from logs, including their cylindering, cutting into blanks with a cross section in the form of a regular octagon, drying the resulting blanks and gluing them into blocks of rectangular cross section, characterized in that the blanks obtained after cutting the log with a cross section in the form of an octagon further cut into a central beam with a cross-section in the form of a square and four side blanks with a cross-section in the form of isosceles triangles, which after drying are glued together ug with the other inclined sides, the resulting glued blank in the form of a parallelogram is sawn into two equal blanks in the form of rectangular trapezoid, which is then glued together with the inclined sides. 3. A method of producing glued sawn timber from logs, including their cylindrical cutting, cutting into blanks with a cross section in the form of a regular dodecagon, drying the resulting blanks and gluing them into blocks of rectangular cross section, characterized in that, in order to increase the volumetric yield of wood, cutting is performed on blanks with a cross section in the form of a regular polygon, and then they are cut into a central beam with a cross section in the form of a square and four side blanks with a cross section in the form of an equal the nibble trapezoid, which after drying is glued together with the inclined sides, the resulting glued preform in the form of a parallelogram is sawn into two equal blanks in the form of rectangular trapezoid, which is then glued together with the inclined sides.

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