RU2237573C1 - Method for location and spacing of blanks of round timbers having a pitch rot - Google Patents

Abstract

FIELD: forest industry, applicable in production of sawn timber.

SUBSTANCE: first the shape and the parameters of the pitch rot are determined. The timber is divided into sectors in the longitudinal direction in the planes passing through the centers of the affected layer in the top and in the butt end. The sectors are divided into parts of parallel generating line on the curvilinear surfaces in the plane of fibers. The parts are straightened by means of steaming and bending or compaction, after that the parts are turned relative to one another through 180 deg. In the vertical and horizontal planes. The surfaces of working are conjugated and fastened to one another. After drying gluing together of the parts in the edge is probable. Connecting elements are made to strengthen the joints in the obtained parts. To obtain products of different dimensions in thickness and quality, the obtained parts are classified according to the geometric parameters and quality characteristics.

EFFECT: enhanced yield of qualitative products.

5 cl, 8 dwg

Description

The invention relates to the forest industry and can be used in the manufacture of lumber.

A well-known sector-wide method of cutting round timber having core rot is that round timber is divided by cuts along the radius into sectors, from which sawn timber is cut along the tangent to annual layers [1].

The disadvantage of this method of cutting is a large range of sizes of the products and a high percentage of waste.

There is also a method of cutting round timber having core rot, including sawing timber in a plane passing through the centers of the apex and butt, removing the core layer, straightening the resulting blanks and gluing them [2].

The disadvantage of the prototype is the reduced quality of the output obtained due to bending of whole preforms and an increase in the deformation of the compressible and stretchable layers of the preforms, as well as the lack of consideration for the placement of the affected core layer relative to the axis of the timber.

The aim of the invention is to increase the yield of quality products.

This is achieved by initially determining the shape and parameters of the core layer, dividing the timber into sectors in the longitudinal direction in planes passing through the centers of the affected layer at the apex and butt; sectors are divided into parts parallel to forming along curved surfaces in the fiber plane, the parts are straightened by steaming and bending or pressing, the field of which the parts are rotated 180 ° relative to each other in the vertical and horizontal planes, mate the processing surface and fasten together. Perhaps after drying the parts gluing them to each other along the edge. In order to increase the strength of the connection in the resulting parts perform connecting elements. In order to obtain products of different sizes in thickness and quality, the parts obtained are sorted by geometric parameters and quality characteristics.

Figure 1 shows the cuttable round timber with an affected core layer; figure 2 is a section aa in figure 1; figure 3 shows a sector with an affected core layer; figure 4 is a section bB in figure 3; figure 5 - parts obtained after dividing the sector; figure 6 - section bb in figure 5; figure 7 - connected parts; in Fig.8 is a section GG in Fig.7.

The method of cutting round timber having core rot is as follows.

Initially, the shape and parameters of the core layer are determined, the timber 1 with the affected core 2 is divided into sectors 3 with the affected core layer 4 in the longitudinal direction in planes passing through the centers of the affected layer at the apex and butt; sectors 3 are divided into parts parallel forming along curved surfaces in the fiber plane, the parts are straightened by steaming and bending or pressing, after which the parts 5 are rotated 180 ° relative to each other in the vertical and horizontal planes, mate the processing surface and fasten together. Perhaps after drying the parts 5 gluing them to each other along the edge. In order to increase the strength of the connection in the obtained parts 5, the connecting elements are made. In order to obtain products of different sizes in thickness and quality, the resulting parts 5 are sorted by geometric parameters and quality characteristics.

The use of this invention will increase the yield of quality products.

Sources of information

1. Aksenov P.P., Makarov N.S., Prokhorov I.K., Tyukina Yu.P. Lumber technology. - M .: Forest industry, 1976, p. 480.

2. Copyright certificate of the Russian Federation No. 2038946, cl. B 27 B 1/00, 1990.

Claims (5)

1. A method of cutting round timber having core rot, including cutting timber in a plane passing through the centers of the apex and butt, characterized in that the shape and parameters of the core layer are initially determined, the timber is divided into sectors in the longitudinal direction in planes passing through the centers the affected layer at the apex and butt; sectors are divided into parts parallel to forming along curved surfaces in the fiber plane, the parts are straightened by steaming and bending or pressing, after which the parts are rotated 180 ° relative to each other in the vertical and horizontal planes, mate the processing surface and fasten together. 2. The method according to claim 1, characterized in that the obtained parts are glued after drying. 3. The method according to claim 1, characterized in that in the resulting parts perform connecting elements. 4. The method according to one of claims 1 to 3, characterized in that the parts obtained are sorted by geometric parameters. 5. The method according to one of claims 1 to 4, characterized in that the parts obtained are sorted by quality characteristics.

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