RU2340441C2 - Method of cutting roundwood that has heart rot - Google Patents

Abstract

FIELD: technological processes; construction.

SUBSTANCE: initial shape and parameters of core layer, cutting of wood into stocks. After definition of core layer shape and parameters, stocks in the form of disks are fixed to the wood ends, and these stocks are previously swan out from the wood with dense central zone in accordance with diameters in the ends of cut wood. Longitudinal sawcut is provided in the wood along the whole length to the wood layer affected with rot. Wood steaming is done, after which wood is fixed in the ends and untwined, then the knife is pulled parallel to generatrix in curvilinear surfaces in plane of fibers, and wood is divided into stocks.

EFFECT: increase of high quality products output and reduction of cutting process power intensity.

4 cl, 8 dwg

Description

The invention relates to the forest industry and can be used in the production of veneers.

The aim of the invention is to increase the yield of quality products and reduce energy intensity.

This is achieved by the fact that on the ends to the timber are fastened prefabricated sawn from wood with a dense central zone, which will improve the fixation of the timber and completely eliminate the possibility of its scrolling during cutting, that is, to reduce the percentage of rejects. The blanks can be in the form of a disk, corresponding to the diameters at the ends of the timber. Then in the timber a longitudinal cut is made along the entire length to the rotten layer of wood. Next is the steaming. Cutting takes place by fixing the timber at the ends and dividing it into parts parallel to forming along curved surfaces in the fiber plane, for example by untwisting and pushing the knife parallel to the forming. The resulting blanks are sorted by geometric parameters and quality characteristics. Then the workpieces are turned relative to each other through 180 ° in the vertical and horizontal planes, mate the processing surface and fasten together. To increase the strength, possible voids formed by core rot or mechanical impact on them are filled at the ends with a hardening compound or billets of healthy wood.

In Fig 1 shows timber with an affected core layer; in Fig.2 is a section aa in Fig.1; in Fig 3 - cuttable timber with fixed disks; in Fig 4 is a section bB in Fig 3; in Fig 5 - the resulting workpiece; in Fig.6 is a section bb in Fig.5; in Fig 7 - connected parts; in Fig. 8 is a section G-G in Fig. 7.

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

Initially determine the shape and parameters of the core layer 1; fasten the blanks in the form of disks 2, pre-cut from wood with a dense central zone, corresponding to the diameters in the ends of the timber 3, which will improve the fixation of the timber and completely exclude the possibility of scrolling during cutting, that is, to reduce the percentage of rejects. Then, cut 4 is made along the entire length to the rotten wood layer 1. After this, the timber is steamed and cut by fixing along the ends and dividing into parts parallel forming along curved surfaces in the fiber plane by untwisting and sliding the knife 5 parallel to the forming.

The resulting blanks 6 are sorted by geometric parameters and quality characteristics. Next, the workpieces are rotated relative to each other by 180 ° in the vertical and horizontal planes, mate the processing surface and fasten together. To increase the strength, possible voids formed by core rot or mechanical impact on them are filled at the ends with a hardening composition 7 or with healthy wood blanks.

The use of this invention allows to increase the yield of quality products and reduce energy consumption.

Claims (4)

1. A method of cutting round timber having core rot, including the initial determination of the shape and parameters of the core layer, cutting the timber into blanks, characterized in that after determining the shape and parameters of the core layer to the ends of the timber, the blanks are attached in the form of disks that are previously cut from wood with a dense central zone in accordance with the diameters at the ends of the timber being cut, then a longitudinal cut along the entire length to the affected Ilya timber layer further produce steaming timber, after which the timber is fixed on the end faces and untwisted, then the knife is slid parallel to the generatrix of the curved surfaces of the fibers in the plane of division and produce a timber for the workpiece. 2. The method according to claim 1, characterized in that the obtained billets are sorted by geometric parameters and quality characteristics. 3. The method according to claim 2, characterized in that the obtained blanks are turned relative to each other by 180 ° in the vertical and horizontal planes, mate the processing surface and fasten together. 4. The method according to any one of claims 1 to 3, characterized in that the voids formed by core rot or mechanical impact on them are filled at the ends of the timber with a hardening composition or with healthy wood blanks.

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