RU2558221C1 - Method of log conversion - Google Patents

Abstract

FIELD: woodworking industry.

SUBSTANCE: logs are sawn along the axis to obtain timber. First, the log conversion is performed on the diameter and the chord. Then the rest part of the log is sawn along the chord. At that, obtaining the timber is carried out from the log parts obtained preliminary by serial sawing along the chord.

EFFECT: increased number of radial cut timber.

4 dwg

Description

The claimed solution relates to sawmill production and can be used at enterprises for the production of lumber.

There are two main methods of sawing logs for the production of lumber, which are widely used, this is sawing logs cut and sawing logs with lumber [1, p. 33].

There are also special methods of sawing logs - break-segment, beam-segment and circular [1, p. 34-35].

A known solution for processing logs, including cylindering logs, sawing them into a square beam and four identical slabs. After processing, the slabs are glued into a hollow beam of rectangular cross-section (RF patent No. 2185280 "Method for processing logs", B27B 1/00, dated 9.1.2001, auth. Isaev SP).

A known method of producing glued sawn timber, in which the cutting of logs is carried out to obtain blanks with a cross section in the form of a regular hexagon, and then cut to obtain a pentagon and two triangles or a hexagon and four triangles (St. St. No. 891436 "Method for the production of glued sawn timber from logs, its variants ". Base of patents of the USSR, dated 23.12.1981, author Chervinsky et al. and RF patent No. 2415749" Method for the production of glued sawn timber from logs (options) ", B27B 1/100, dated 9.06.2009).

A known method of producing glued blanks of radial sawing, in which the cutting of logs is carried out along the axis into sectors, the gluing of the sectors is carried out by shifting the radial surfaces, and the near-core part of one sector is combined with the peripheral part of the other, and their butt parts with vertex (Av. St. No. 490651 , from 11/05/1975. A method for producing glued blanks for radial sawing. Base of patents of the USSR, p. 27273, author Chervinsky et al.).

Known log cutting sector way. The known method involves sawing part of the log along the axis with obtaining lumber [1, p. 34] (the closest analogue).

A disadvantage of the known methods is that when sawing logs, a small amount of sawn timber of a radial cut is obtained.

The problem solved by the claimed invention is to increase the number of sawn timber radial cut by sawing along the axis of the log.

The solution to this problem is ensured by the fact that sawing is carried out along the axis of the log, while sawing the logs is carried out in diameter and chord, and the rest of the log along the chord, while the production of sawn timber is made from previously obtained parts of the log by sequential sawing along the chord.

The technical essence of the invention lies in the fact that parts of the log are formed in diameter and chord, and the remaining part of the log in the chord, while the production of lumber is made from previously obtained parts of the log by sequential sawing along the chord, in addition, this allows you to expand the range by obtaining radial boards with a trimmed edge, which provides the possibility of subsequent gluing of boards along the trimmed edge to obtain a panel or timber material. In addition, the resulting parts of the log are not described by any mathematical definition from geometry. If you divide the log by chord, then the resulting part of the log is called a segment. If the division of the log is carried out along two radii (or two diagonals), then the formed geometric figure is called the sector. In literary sources, there is no description of the geometric figure obtained by dividing the circle by the diameter and chord, and by two chords, so the proposed method for sawing logs in diameter and chord can be called SEGTOR (segment and sector from words).

Figure 1 shows a diagram of sawing logs in diameter to obtain segment 1 (known).

Figure 2 shows a diagram of the sawing of segment 1 along the chord to obtain part 2 (segment) and part 3 (segment).

Figure 3 shows a diagram of the sawing of part 3 (segment) along the chord to obtain part 4 (segment).

Figure 4 shows a diagram for the production of radial lumber 5 with sequential sawing of parts 2 (segment) and 4 (segment) along the chord.

The invention is illustrated by the following example. The method of sawing a log is as follows: first, the log is sawn along the axis of the log in diameter to obtain segment 1. Then, the resulting segment 1 is sawn along the axis of the log along the chord to obtain part 2 in the form of a segment and segment 3. After that, the remaining part of the log 3 is sawn along the chord . The resulting part of log 2 (segment) (or parts of log 2 (segment) and 4 (segment)) is sawn into lumber of a given size along a chord to obtain radial lumber 5.

The application of this method allows to obtain a larger amount of sawn timber radial cut, which is necessary for the production of, for example, window timber.

Bibliography

1. Rykunin S.N., Tyukina Yu.P., Shalaev B.C. Technology of sawmill and woodworking industries, ed. Moscow State University, 2005, 322 pp.

Claims (1)

A method of sawing logs, including sawing logs along the axis to produce lumber, characterized in that the sawing of the logs is first carried out in diameter and chord, and the remainder of the log along the chord, while lumber is produced from previously obtained parts of the log by sequential sawing along the chord.

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