RU2635577C1 - Method of ripping timber and machine for its implementation - Google Patents

Abstract

FIELD: wood processing industry.

SUBSTANCE: machine includes the saw mechanism, the mechanism to remove the sawn-off boards, the supporting-rotary column, the receiving tables for timber loading. The receiving tables are installed with the possibility to move the support-rotary column between them and its displacement in the vertical plane for adjusting the thickness of the sawing boards. The saw mechanism and the mechanism to remove the sawn-off boards are permanently fixed on the supporting-rotary column in such a way, that when it is turned into the working position, one of the mechanisms is located above each receiving table. Timber materials are loaded onto the receiving table, the thickness of the sawn-off board is adjusted, the saw mechanism is moved along the timber with its simultaneous sawing, the saw mechanism is returned to its original position and the sawn-off board is removed. Simultaneously with the board separation from the timber and the board removal, sawn-off earlier from the timber, the thickness of the new board is adjusted.

EFFECT: bandsaw machine efficiency increase.

3 cl, 2 dwg

Description

The invention relates to the forestry and woodworking industries, in particular to the technology of longitudinal sawing of timber.

Currently known band saw containing a saw mechanism mounted on the frame, running trolleys mounted on rail tracks and clamping elements (RU No. 2181080, publ. 10.04.2002, Bull. No. 10).

The disadvantage of this design and the longitudinal sawing method it implements is the low productivity of the machine due to the need for idling of the trolley after each cut.

Known technical solution for patent document SU 90779 A1, class. B27B 15/02, publ. 09/25/1958, including a trolley with saw pulleys, an I-beam, a cantilever frame, a vertical rack, a turntable mounted on the end of the beam.

The disadvantages of this design are its complexity and bulkiness. The method of longitudinal sawing that it implements involves the time spent on adjusting the thickness of the sawn boards and removing finished products from the machine after the separation of each previous board from the timber.

The closest in technical essence is the technical solution presented in the application for the invention No. 20133120446/13 dated 04/30/2013, B27B 15/02. Application publication date 10.11.2014, Bull. No. 31). This design includes a saw mechanism, a frame, a clamping mechanism, a feed mechanism. The machine is equipped with an I-section guide, with a cargo trolley, on which a slewing-rotary mechanism is rigidly fixed, made in the form of a bearing assembly from one of the vertical racks of the frame and fixed in the working position by means of a stopper mounted on its body. The method of longitudinal sawing, implemented by this installation, eliminates the return of the saw mechanism to the initial point of the beginning of sawing, and therefore, the idle passages of the machine in preparation for a new cut.

The disadvantage of this machine and the method of longitudinal sawing it implements is the time it takes to adjust the thickness of each new sawed board and remove the sawn boards after each longitudinal sawing of the timber, as well as the bulkiness of the saw mechanism, the complex structure of which necessitates excessive demands on the strength of the support rotary mechanism.

The purpose of the development of the proposed technical solution is to reduce the time spent on setting the thickness of the boards and removing finished products from the machine.

These design flaws are eliminated by the fact that the sawing mechanism and the sawn board removal mechanism are stationary mounted on the slewing column so that when it is rotated to the working position necessary for longitudinal sawing of timber, one of these mechanisms is located above each receiving table.

The indicated drawbacks of existing methods of longitudinal sawing are eliminated by the fact that the thickness adjustment of each new board with the movement of timber coming into the processing plane to the plane of operation of the saw mechanism is carried out simultaneously with the separation of the board from other timber and the removal of the board previously sawn from the timber coming into processing at that time how the supply of timber to the sawmill is performed with the possibility of their simultaneous loading on reception tables located from two opposite sides of the machine, and the piecewise movement of the boards obtained is carried out alternately in each of the stacks of finished products located on two other opposite sides of the machine.

In FIG. 1. presents a front view of the machine; in FIG. 2 shows a side view of the machine.

A band saw for longitudinal sawing of timber includes: a saw mechanism 1 equipped with a band saw, a mechanism for removing sawn boards 2, a slewing ring consisting of a vertical rack 3, bearings 4, a housing 5, rigidly connected to a freight cart 6 installed in I-section guide 7, and receiving tables 8 for loading timber, mounted on both sides of the machine with the possibility of movement of the support-rotary column between them and their displacement in the vertical plane for tuning thickness of the sawed boards 9. Timber 10 is loaded onto the receiving tables by means of loading mechanisms 11. The reception tables are lifted by means of lifting mechanisms 12. The position 13 indicates the timber waiting to be fed to the receiving tables, 14 - stacks of finished products (boards).

The sawing mechanism and the mechanism for removing sawn boards are stationary mounted on the support-rotary column so that when it is rotated to the working position necessary for longitudinal sawing of timber, one of these mechanisms is located above each receiving table.

The proposed design can be mounted in the workshop or mounted on a trailer in order to create a mobile sawmill and perform all necessary operations on the cutting area.

The machine operates as follows. The loading of timber on the reception tables is carried out by means of loading mechanisms, with the possibility of their simultaneous loading on the reception tables located on two opposite sides of the machine. Timber is centered. Adjusting the thickness of the sawn board from one of the loaded timber is carried out by lifting to the required height the corresponding receiving table. While in working position, the saw mechanism is located above one of the marked receiving tables, while the mechanism for removing sawn boards is located on the other receiving table of the machine. Then the sawing mechanism comes into operation, which, by moving the trolley along the guide, moves along the timber and cuts one of them longitudinally. The saw mechanism moves from the butt to the top. At the same time, the mechanism for removing sawn boards freely moves along the second timber, since it has not yet been raised into the zone of its action. After the cut of the first timber is finished, the saw mechanism rotates relative to the vertical axis by turning the support-rotary column 180 degrees. The slewing column is locked in a new position. In this case, the saw mechanism is above the second loaded timber, and the mechanism for removing sawn boards above the timber, from which the previous board has just been separated. The level of the reception table, on which the second timber is located, is being adjusted. The saw mechanism comes back into operation and, by moving the trolley along the guide, moves along the timber in the opposite direction, performing longitudinal sawing of the second timber and separating the board from it. In this case, the saw mechanism moves from the top to the butt. The mechanism for removing sawn boards moves along the surface of the first timber and removes the sawn board at the previous stage of its processing, storing it in a stack of finished products located in the direction of movement of this mechanism. As a mechanism for removing sawn boards, for example, a similar mechanism installed on the Sumska Kraljica and 6 super machine can be used. Simultaneously with the separation of the board from the second timber and the removal of the board previously sawn from the first timber, the thickness of the new board of the first timber is adjusted by moving it to the plane of operation of the saw mechanism by lifting the corresponding receiving table to the required thickness of the board. Thus, the additional time required to adjust the thickness of each subsequent new board is completely absent. The thickness of all subsequent boards of each of the timber loaded on the receiving tables is adjusted during the movement of the saw mechanism in the process of sawing adjacent timber.

Piece-wise movement of the boards obtained is carried out alternately in each of the stacks of finished products located along the axes of sawn timber from two opposite sides of the machine.

This technical solution allows to increase the performance of the band saw due to the reduction of the cycle time. In addition, the design of the saw mechanism mounted on the slewing column is facilitated, which reduces the requirements for its strength.

Claims (3)

1. A machine for longitudinal sawing of timber, including a saw mechanism, a mechanism for removing sawn boards, slewing ring, receiving tables for loading timber, installed with the possibility of movement of the slewing ring between them and shifting them in a vertical plane to adjust the thickness of the sawed boards, characterized in that the saw mechanism and the mechanism for removing sawn boards are stationary mounted on the support-rotary column so that when it is rotated to the working position, it is necessary for longitudinal cutting of timber on each receiving table is one of these mechanisms. 2. A method of longitudinal sawing of timber, which includes loading timber onto the receiving table, adjusting the thickness of the sawn board, moving the saw mechanism along the timber laid on the receiving table with its simultaneous sawing, returning the sawing mechanism to its original position and removing the sawn board from the zone for further sawing of timber, different the fact that the thickness adjustment of each new board with the movement of timber coming into the processing in the plane of the saw fur ism is carried out simultaneously with the separation of boards from another timber, and removing the board, the previously sawn timber from entering the processing. 3. The method according to p. 2, characterized in that the supply of timber to the sawmill is performed with the possibility of simultaneous loading onto receiving tables located on two opposite sides of the machine, and piece-wise movement of the boards obtained is carried out alternately in each of the stacks of finished products located with two other opposite sides of the machine.

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