Method for preferably cutting timber in longitudinal direction and circular saw machine for preferably cutting timber in longitudinal direction

Abstract

The present invention discloses a method for longitudinally optimizing cutting timber. The method comprises the following steps: inputting a cutting data list into a computer device beforehand, selecting a width reference border of sawtimber to be cut for confirming the maximum width of sawtimber to be cut, transmitting the information to the computer device for selecting an optimal cutting plan through analyzation and calculation, axially moving the circular saw blade of saw cutting machine to a cut line position corresponding with the sawtimber to be cut according to instruction of computer device for longitudinally cutting the sawtimber to be cut to finished sawtimber and waste edge material. The timber cutting optimizing circular sawing machine for realizing the method of the invention comprises a circular sawing machine base, a feeding chain plate, a sawblade main shaft, a front compression roller and a back compression roller, wherein the front compression roller and the back compression roller are positioned at the front side and the back side. The marking-off equipment stand which is fixedly installed at the front end of engine base is installed with follower marking-off equipment. A moving circular saw blade is installed on the main shaft of sawblade. The main shaft assembly and the upper frame are respectively supported on the front lifting upright post and the back lifting upright post with a liftable mode. The method of the invention can greatly increase the material yielding rate and production efficiency and has the advantages of high automatization degree and wide application sphere.

Description

technical field [0001] The invention relates to the technical field of wood processing, in particular to a method for longitudinally and preferably cutting wood. The invention also relates to a circular saw machine for realizing optimal longitudinal sectioning of timber. Background technique [0002] With the economic development and the increasing demand for timber resources in people's social life, as well as the protection of limited log resources, the current timber processing industry, especially the sawmill industry, is facing higher and higher economic and technical challenges. Multiple processing requirements, which not only require the sawing industry to have a higher sawing production efficiency, but also require the sawing industry to have a higher wood yield and wood utilization rate in the sawing process. [0003] The longitudinal slitting of wood in the width direction or the transverse truncation along the length of the wood, or a combination of the two, cons...

AI Technical Summary

Problems solved by technology

[0004] Although the above-mentioned multi-blade circular saw machine with fixed saw blade spacing has the advantages of easy control of the board width and easy guarantee of the target size compared with single saw blade sawing equipment, the existing longitudinal section method and its multi-blade circular saw machine The existing defects are also obvious: First, it is impossible to choose the best sawing plan according to the characteristics of the raw material with a fixed saw blade spacing, but only "copy" the corresponding board width according to the set saw blade spacing, which is only Depending on the pre-determined saw blade spacing, it is impossible to avoid defects such as knots or splits in the wood during the sawing process, so this fixed sawing size is bound to be far from the optimal sawing plan, and the best The sawing plan should consider the characteristics of the given actual sawn timber, and determine the optimal sawing order according to the optimized mathematical method and reasonable collocation. This sawing plan that cannot be optimized means that more sawing will be generated. Scrap, low yield

Second, even if the existing multi-blade circular saw machine with fixed saw blade spacing is connected with a computer control system and computer technology is used to control its production process, this control is only limited to sawing speed and sawing thickness, etc. The control of parameters cannot fully and fully utilize the computer control system used in the sawing machine, which limits the realization of a greater degree of automation in the sawing process. Similarly, the equipment cannot automatically generate sequences according to the optimal plan for sawing raw materials. Axial movement of the circular saw blade

Third, to adjust the target width of sawing boards, it is necessary to remove the circular saw blades on the saw shaft one by one, select and install the corresponding saw blade spacers, and then lock and fix each saw blade; The adjustment process is completed by manual operation, which is not only labor-intensive, but also produces more non-productive time. At the same time, the sawing width scheme selected and determined by the operator is more dependent on its own experience. And the corresponding material requirements, it is impossible to produce the optimal board width combination, and it will inevitably produce more scraps for different raw materials, resulting in greater waste of raw material resources

Fourth, in the existing multi-blade circular saw machine, the front and rear pressure feed rollers are respectively arranged in parallel on the front and rear sides of the circular saw blade and its saw shaft. The feeding rollers maintain a relatively large distance from the cutting position of the circular saw blade, so within a long distance before and after the cutting position of the circular saw blade, the wood to be sawed is actually in an unconstrained state, and the vertical and horizontal sawing The cutting force may not only cause the tearing of the wood during the sawing process, resulting in waste of wood, but what is more prominent is that when the head or end of the wood is in this unrestricted stage, the feeding of the wood cannot be kept coherent and smooth. Conveying, especially for wood sapwood, is more prominent, often the sapwood cannot be sent out smoothly and continuously, losing reliable and effective guidance to the sawn timber, and it can also produce mutual interference and collision between sawn timber, which directly affects Yield and productivity of sawing equipment

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