RU2399482C2 - Method for cutting of round timber affected with heart rot - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: invention refers to timber industry. Method includes identification of rot propagation length, sawing-off combined plank timber, including affected part and plank timber of standard length, identification of cutting program, cutting of combined plank timber. Sawing of combined plank timber is carried out with production of combined two-edged cant, including rot, and side timber without rot. Combined two-edged cant is used to make square-edged combined timber and side square-sawn timber, square-edged timber is separated into high-quality square-edged timber of standard length and low-quality square-edged timber, and timber having wane in top part is separated into high-quality timber of standard length and slab part, or combined two-edged timber is cut into square-sawn timber parallel to side edges. Produced combined core of alternating rectangular section is separated into low-quality and high-quality parts, in low-quality parts rot and bark are removed parallel to their generatrices. Produced stocks of alternating section after drying and sorting are turned relative to each other by 180° in horizontal plane, and are fixed to each other. High-quality parts of combined cores in several round timber pieces also after drying and sorting are turned relative to each other by 180° in horizontal plane, and are fixed to each other.

EFFECT: invention increases yield of high-quality sawn timber.

20 dwg

Description

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

Known beam-breakup method of cutting round timber affected by core rot. On the first pass, a two-edged beam is obtained, including core rot, and unedged lumber, on the second pass, edged lumber and a low-quality core part are obtained from a two-edged beam [1].

The disadvantage of this method of cutting is a high percentage of waste.

Another well-known method of obtaining sawn products from whips affected by core rot includes sawing off a combined assortment, including a standard assortment, and a site affected by core rot, fixing it to a healthy peripheral zone, determining a cutting program, dividing it into parts in the longitudinal direction, separating lumber, affected by core rot, from the main stream, sawing off the affected areas, drying and sorting, removing bark and rot from the affected areas parallel to the image barking and rotting, turning the obtained blanks through 180 ° in a vertical plane and gluing [2].

This method is adopted as a prototype as the closest to the proposed method according to the achieved result and technical features. The disadvantage of the prototype is the high complexity of cutting and transportation of low-quality waste.

The present invention solves the problem of cutting round timber affected by core rot, with obtaining high quality sawn products with a minimum amount of wood waste and a minimum of laborious operations.

The technical result of the invention is to enable the cutting of round timber affected by core rot.

Figure 1 shows the combined round timber 1 with a low-quality core layer 2, sawn into two-edged combined beam 3 and unedged timber 4; figure 2 is a section aa of figure 1; figure 3 - two-edged combined beam 3 and obtained from it a combined four-edged beam 5 and lumber 6; figure 4 is a section bB of figure 3; figure 5 - combined four-edged beam 5; figure 6 - section bb In figure 5, which shows the division of the combined four-bit beam into a low-quality part 7 and high-quality four-edged beam 8; in Fig.7 - unedged lumber 4, having an overview in the apex part, the high-quality unedged lumber 9 and slab part 10 obtained from it; on Fig - section GG of Fig.7; figure 9 - edged lumber 6, having a survey in the apex part, obtained from it high-quality edged lumber 11 and slab part 10; figure 10 is a section DD of figure 9; figure 11 - two-edged combined beam 3, obtained from it parallel to the side edges of edged lumber 12 and the combined core part 13; on Fig - section EE of Fig.11; in Fig.13 - combined core part 13 and obtained from it low-quality part 14 and high-quality part 15; on Fig - section FJ of Fig; on Fig - fastened together high-quality core parts 15; in Fig.16 is a section 3-3 of Fig.15; on Fig - low-quality core part 14 and obtained from it blanks of variable cross section 16; on Fig - section II; on Fig - bonded blanks 16; in Fig.20 is a section KK K Fig.19.

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

Combined round timber 1 with a low-quality core 2 is fixed for a healthy peripheral zone, the shape and parameters of the core layer are determined and subjected to cutting from the butt end according to the program, thereby obtaining a two-edged combined beam 3, including a low-quality core 2, and unedged lumber 4.

Next, the obtained two-edged combined beam 3 is based on one of the machining surfaces and is cut into a four-edged combined beam 5 and edged lumber 6. The four-bit combinent beam is divided into a low-quality part 7 and a high-quality four-edged log of standard length 8. Unedged lumber 4 having a bump in the apex , divided into high-quality unedged lumber of standard length 9 and the hump portion 10. Similarly, edged lumber 6 having a bend at the tops is similarly divided of the second part, to high-quality edged lumber 11 and slab part 10. In order to increase the yield of sawn timber, the combined two-edged beam 3 is cut into edged lumber 12 parallel to the side edges, and the resulting combined core 13 of variable rectangular cross-section is divided into low-quality part 14 and quality part 15. From low-quality parts 14 remove the bark and rot parallel to their generators, the obtained blanks 16 of variable cross section after drying and sorting are deployed relative to each other ha at 180 ° in a horizontal plane, and bonded together. The quality parts 15 of the combined cores of several round timber also, after drying and sorting, are rotated 180 ° relative to each other in the horizontal plane and fastened together.

The proposed method for the production of sawn timber from round timber affected by core rot allows rational use of high-quality wood of a low-quality part of a combined sawlog, and also greatly simplifies the transportation of a low-quality part.

Information sources

1. Korobov, V.V. Processing low-quality wood raw materials. Problems of non-waste technology. - M: Ecology, 1991 .-- 287 p.

2. A method of obtaining sawn products from whips affected by core rot: US Pat. 2171175 Ros. Federation, IPC В27В 1/00 / Toropov A.S., Kropotova E.V .; applicant and patent holder Mariysk. state tech. un-t - No. 2000102495/13; declared 02/01/00; publ. 07/27/01, bull. No. 21. - 8 pp., Ill.

Claims (1)

A method of cutting round timber with core rot, including determining the spreading length of rot, sawing off a combined sawlog including a damaged part and a sawlog of standard length, determining a cutting program, cutting a combined sawlog, characterized in that the sawing of a combined sawlog is made to produce a combined two-edged beam, including rot, and side lumber without rot from a combined two-edged beam, or four the combined antenna beam and side edged sawn timber, the four-edged combined timber is divided into a high-quality four-edged standard-length timber and a low-quality four-edged timber, and the lumber having an overview in the top part is divided into high-quality standard-length timber and a humped part, or the combined two-edged timber is cut into edged sawn timber parallel to the lateral edges, and the resulting combined core of variable rectangular section is divided into low high-quality and high-quality parts, bark and rot are removed from the low-quality parts parallel to their generators, the obtained blanks of variable cross section are rotated 180 ° relative to each other in the horizontal plane and fastened together, the high-quality parts of the combined cores of several round timber also after drying and sortings are rotated relative to each other by 180 ° in the horizontal plane and fastened together.

Images