RU2524090C1 - Method of production of decorative lumber from rounded logs - Google Patents

Abstract

FIELD: woodworking industry.

SUBSTANCE: roundup of log, making longitudinal semicircular laying groove, cross-cutting of rounded log is carried out. Then the log is sawn into segments and the boards, which side surfaces are oriented parallel to the plane of symmetry of the workpiece passing through the middle of the longitudinal semicircular groove. The longitudinal cutting of the log is carried out along the symmetrical planes which are located at a distance of (0.25-0.5)·R from the plane of symmetry of the workpiece, wherein R is the radius of the log.

EFFECT: increased volumetric beneficial yield of decorative lumber when cutting logs of various diameters.

3 cl, 13 dwg

Description

The invention relates to the forest industry and can be used in the production of decorative materials from wood used in construction.

A known method of cutting logs, the essence of which is the preliminary milling of the lower layer and obtaining a stepped beam with its subsequent cutting on edged boards [1].

The disadvantage of this method is that it is not effective for cutting thin logs, and also eliminates the possibility of using natural cylindrical decorative surfaces of the logs.

A known method for the production of decorative lumber from fine logs, consisting of cylindering a log, followed by milling a groove, the radius of which is equal to the radius of the logs. Next, sawing of logs is carried out with the receipt of two segments and one board having a decorative appearance [2].

This method of production of decorative lumber is accepted by us as a prototype.

The disadvantages of the prototype are the low useful volumetric yield of decorative lumber and the lack of the possibility of sharing decorative lumber obtained from logs of various diameters when forming a single artistic design solution - when decorating surfaces.

The technical result of the invention is to increase the volumetric useful yield of decorative lumber when cutting round logs and the possibility of making a single artistic and design composition using decorative lumber obtained from logs of various diameters.

The technical result is achieved in that the longitudinal cutting of the log is carried out on symmetrical planes located at a distance of (0.25 ÷ 0.50) · R (where R is the radius of the log) from the plane of symmetry of the workpiece. In this case, the flat surfaces of the resulting decorative lumber and boards are machined, for example, by milling. In order to obtain a unified artistic and design concept, the resulting decorative lumber is rotated 180 ° relative to each other in the longitudinal and transverse planes, is joined together and fastened with a flat surface to the base, while a heater, for example, based on natural fiber, is laid between the joint surfaces of the lumber.

In Fig.1 shows a rounded log sawn into segments and a board; figure 2 is a section aa of figure 1 and the plane of log division according to the first method, passing through the extreme points of the longitudinal semicircular (lunar laying) groove; figure 3 shows the edged board obtained by cutting logs in the first way; figure 4 is a section bB of figure 3, figure 5 shows decorative lumber (segment) obtained by the first method of cutting; figure 6 is a section bb In figure 5; figure 7 shows a log sawn into segments and a board; on Fig - section GG of Fig.7 and the plane of log division according to the second method, passing at a distance of (0.25 ÷ 0.5) · R (where R is the radius of the log) from the plane of symmetry of the workpiece; figure 9 shows the edged board obtained by cutting logs in the second way; figure 10 is a section DD of figure 9; figure 11 shows decorative lumber (segment) obtained by the second method of cutting; Fig.12 is a section EE of Fig.11. On Fig shows the joint use of decorative lumber obtained from logs of various diameters (18, 20 and 24 cm) in the formation of a single artistic design solution.

A method of manufacturing decorative lumber is as follows.

Initially, the logs are cylinderized and a longitudinal semicircular laying groove is made. Then the resulting log 1 is trimmed and then sawed longitudinally into decorative lumber (segments) 2 and board 3. The lateral, flat surfaces of the resulting lumber 2 and 3 are oriented parallel to the plane of symmetry of log 1, which passes through the middle of the longitudinal semicircular (lunar laying) groove. In order to increase the volumetric useful yield of decorative lumber and the possibility of making a single artistic and design composition using decorative lumber obtained from logs of various diameters, the longitudinal cutting of logs 1 is carried out along symmetrical planes located at a distance of (0.25 ÷ 0.5) · R (where R is the radius of the log) from the plane of symmetry of the log (blank). In this case, two options for cutting and obtaining decorative lumber and edged boards are possible depending on the distance from the plane of symmetry to the plane of the cut - Fig.2 and Fig.8. Subsequently, machining of the flat surfaces of the decorative lumber 2 and edging boards 3 is possible, for example, by milling or grinding. In order to obtain a unified artistic design concept, the resulting decorative lumber is rotated 180 ° relative to each other in the longitudinal and transverse planes, joined together and fastened with a flat surface to the base, while a heater, for example, based on natural fiber, is laid between the joint surfaces of the lumber tow, jute, flax) or synthetic (mineral wool, glass wool).

The range obtained on the basis of theoretical and experimental studies (Fig.13), allows to achieve a dense joining of decorative lumber obtained from logs of various diameters when used together and the formation of a unified artistic design solutions.

The use of this invention will increase the value of the volumetric useful yield of decorative lumber from logs and get a single artistic and design composition using decorative lumber obtained from logs of various diameters.

Used analogues and prototypes

1. USSR author's certificate No. 564152, cl. B27B 1/00, 1977.

2. RF patent No. 2110400, B27B 1/00, 1998.

Claims (3)

1. A method for the production of decorative lumber, including cylindering a log, manufacturing a longitudinal semicircular laying groove, trimming a cylindrical log, its subsequent longitudinal sawing into segments and a board, the side surfaces of which are oriented parallel to the plane of symmetry of the workpiece, which passes through the middle of the longitudinal semicircular groove, characterized in that that the longitudinal cutting of the logs is carried out on symmetrical planes located at a distance from the workpiece symmetry plane (0.25 ÷ 0, 5) R
where R is the radius of the log. 2. The method of manufacturing decorative lumber according to claim 1, characterized in that the flat surfaces of the resulting decorative lumber and boards are processed mechanically, for example, by milling. 3. The method of production of decorative lumber according to claim 1 or 2, characterized in that the resulting decorative lumber is rotated relative to each other by 180 ° in the longitudinal and transverse planes, joined together and fastened with a flat surface to the base, while laying between the butt surfaces of the lumber insulation, for example, based on natural fiber.

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