CN201483582U - Quarter-sawn lumber circular saws - Google Patents

Abstract

The utility model relates to a circular sawing machine for quarter-cut boards, which is mainly composed of a mobile sawing device and a log clamping device. The mobile sawing device is equipped with a horizontal sawing head assembly and a vertical sawing head assembly. The projections of the edges of the cutting parts of the two saw blades on the cross-section of the log intersect at one point. The sawing head assembly is driven by a servo motor to achieve horizontal cutting. and vertical infeed. The log clamping device is provided with a log horizontal centering mechanism, a log jacking mechanism and a log clamping mechanism. The log horizontal centering mechanism is used to adjust the projection of the log axis in the horizontal plane to be at the center of the clamping device; the log jacking mechanism lifts the small diameter end of the log so that the log axis is in a horizontal state. After the state of the log is adjusted, it is clamped and fixed by the log clamping mechanism. The mobile sawing device reciprocates along the longitudinal track to realize longitudinal feeding. One feed completes the sawing of one plate. Good sawing quality and high efficiency; small footprint; easy to use and operate.

Description

Quarter-sawn lumber circular saws

technical field

The utility model belongs to the technical equipment field of log lumber, and particularly relates to a circular saw machine for lumber processing which adopts a double circular saw blade sawing method to saw logs and process them into quarter-cut boards.

Background technique

Quarter-sawn lumber has the advantages of small dry shrinkage in the width direction (that is, the radial direction of the log), stable dimensions, small deformation and not easy to crack. Therefore, it has been widely used in musical instruments, aviation, instruments, construction, furniture, flooring, and door and window manufacturing. In order to improve the use value of wood, as many quarter-sawn boards as possible should be produced during timber production. Typical sawing methods for quarter-sawn lumber are: radial sawing, star sawing and trapezoidal sawing.

When adopting the radial sawing method, the log is first sawn radially into 3 to 6 fan-shaped lumber symmetrical to the center, and then each fan-shaped lumber is sawed according to the requirements and size specifications of the cross-sectional texture of the quarter-sawn lumber , due to the large oblique edge of the sawn quarter-sawn board, it needs to be trimmed, which limits the improvement of the yield rate. The sawing process of the radial downward sawing method is complex. For large-diameter logs, various types of sawing machines need to be used to complete the processing, such as: fan-shaped material cutting circular sawing machine, sports car and band saw with modified clamping device, Light-duty frame saws or double-spindle multi-blade circular saws, split saws and trimming saws, etc. The log needs to be clamped from both ends before sawing with a fan-shaped material cutting circular saw machine. During the sawing process, the log needs to be rotated many times, which brings great inconvenience to the sawing operation. The production efficiency is low, and the dimensional accuracy of the plate is also low.

The star down sawing method is somewhat similar to the radial down sawing method. It is mainly used for sawing small-diameter logs. It can produce sawn timber with rectangular and triangular sections. Glue together to obtain quarter-sawn boards.

When adopting the trapezoidal sawing method, first determine the best sawing pattern according to the diameter of the log, the position of the pith center of the log, and the size of the board. The yield rate of the quarter-sawn board is higher than that of the radial sawing method. The sawing process of the trapezoidal lower sawing method is simple. The saw cuts of the cross-section of the log are horizontal and vertical. During the sawing process, the log is fixed and does not need to be turned over, requiring less equipment. The sawing can be completed by a circular saw machine, and the sawing efficiency is high. , The dimensional accuracy of the plate is high.

When sawing with the trapezoidal sawing method, the circular saw machine used can be divided into two types: a single saw blade circular saw machine and a double saw blade circular saw machine according to the number of circular saw blades.

When sawing with a single saw blade, it is required that the saw head can rotate around a straight line parallel to the axis of the log, so that the saw blade is in a horizontal state and a vertical state respectively. The sawing of a board needs to be carried out twice. Rotation adjustment and feeding operations are all done manually, which is labor intensive and affects efficiency.

When sawing with double saw blades, the two circular saw blades are arranged perpendicular to each other at right angles, and the horizontal saw blades and vertical saw blades are arranged staggered back and forth along the length of the log. The projections on the surface intersect at exactly one point. The two circular saw blades can realize synchronous feed adjustment in the horizontal direction (horizontal direction and vertical direction). The log is clamped on the moving sports car. When sawing, the sports car drives the log to realize the longitudinal feed. , the log feeding completes the sawing of a board at a time. According to the trapezoidal sawing method from right to left and from top to bottom, the sawing of the whole log can be realized. High degree of automation, low labor intensity and high production efficiency.

However, the above-mentioned circular saw machine for making timber with double saw blades has the following disadvantages due to the longitudinal feeding of logs: (1) the quality of the logs is relatively large, the inertia of the feed movement is large, and the stability is poor, which limits the feed sawing feed. The increase of speed affects the sawing quality and production efficiency; at the same time, the feed power consumption of the log sports car is relatively large; (2) Since the length of the log is relatively large, it is generally larger than the size of the sawing device in the direction of the log length. At present, the overall length of the circular saw machine is relatively large, and it occupies a large area.

(3) The clamping of the log on the sports car is manually operated, and the labor intensity is high. At the same time, there is also a lack of an adjustment mechanism for the position of logs, which will affect the quality and yield of quarter-sawn boards to a certain extent.

Contents of the invention

In order to overcome the shortcomings of the above-mentioned circular sawing machine with double saw blades, the utility model provides a new type of circular saw machine with double saw blades for quarter-cutting boards, which improves the stability of the sawing process, sawing efficiency and sawing efficiency. Quality, reducing the labor intensity of the operator, reducing the length and size of the machine tool and the occupied area.

The technical scheme adopted by the utility model to solve its technical problems is: two circular saw blades and two motors are used to form a horizontal sawing head assembly and a vertical sawing head assembly respectively, and the edges of the cutting parts of the two circular saw blades are placed on the logs. The projections on the cross-section just intersect at one point, the sawing head assembly is driven by a servo motor to realize the feed, and the mobile sawing device is composed of two mutually perpendicular sawing head assemblies; The log centering mechanism and jacking mechanism adjust the log position. When sawing, the log is fixed, the horizontal and vertical feed movements are completed by the saw blade, and the centering and leveling of the log are adjusted before the log is clamped. For this reason, the main structure of the circular sawing machine for quarter-cut boards provided by the utility model includes two parts: a mobile sawing device and a log clamping device. The mobile sawing device feeds along the length of the log, and the two circular saw blades on the sawing device can simultaneously realize the feeding motion in the horizontal and vertical directions to meet the size requirements of the quarter-sawn board cross section. The logs are fixed by a hydraulic clamping mechanism, which is convenient and fast. Because the log has a certain degree of sharpness, in order to ensure the quality and yield of quarter-sawn boards, it is necessary to adjust the horizontal centering and the horizontal state of the log axis before clamping the log, so that the direction of the log axis is consistent with the sawing device. The direction of the longitudinal feed movement is parallel, so a log horizontal centering mechanism and a log jacking mechanism are set on the log clamping device.

The beneficial effects of the utility model are: (1) During the sawing process, since the heavy log is fixed, the sawing device realizes the feed motion, the feed motion is stable, the speed is high, and the sawing quality and efficiency are improved. (2) Using the plan of fixing the log and moving the sawing device, the total length of the circular saw machine is short and the floor space is small; (3) The horizontal centering adjustment of the log, the adjustment of the horizontal state of the axis of the log and the clamping of the log All adopt hydraulic method, which is convenient and quick to operate.

Description of drawings

Fig. 1 is a front view of a quarter-cut board circular saw machine. In the figure, 1-log horizontal centering mechanism, 2-log jacking mechanism, 3-log clamping mechanism.

Figure 2 is a front view of the mobile sawing device. In the figure, 4-saw frame, 5-horizontal sawing head assembly, 6-vertical sawing head assembly, 7-sawing head lifting mechanism, 8-saw frame reciprocating mechanism, 9-roller, 10-adjusting screw, 11-vertical track, 13-ball screw pair, 17-chain, 18-guide wheel.

Fig. 3 is a side view of the mobile sawing device. 7-saw cutting head lifting mechanism, 9-roller, 12-chain drive, 14-chain drive, 15-rotating shaft, 16-sprocket, 17-chain, 18-guiding wheel.

Figure 4 is a side view of the log clamping device. In the figure, 1-log horizontal centering mechanism, 2-log jacking mechanism, 3-log clamping mechanism.

Figure 5 is a log horizontal centering mechanism. Among the figure, 19-support rod, 20-fork, 21-oil cylinder, 22-oil cylinder support, 23-fork support, 24-synchronous mechanism.

Fig. 6 is log jacking mechanism. Among the figure, the vertical guide mechanism of 25-top plate, 26-top plate, 27-oil cylinder, 28-oil cylinder support.

Fig. 7 is log clamping mechanism. Among the figure, 29-jaw, 30-jaw track, 31-fork, 32-oil cylinder, 33-fork support, 34-guide seat.

Detailed ways

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described further. As shown in Fig. 1 and Fig. 4, the quarter-cut board circular saw machine provided by the utility model is mainly composed of a mobile sawing device and a log clamping device. The log clamping device is provided with two sets of log horizontal centering mechanisms 1, two sets of log jacking mechanisms 2 and seven sets of log clamping mechanisms 3. When clamping the log, the position of the log axis is first adjusted through the horizontal centering mechanism 1 and the jacking mechanism 2, so that the direction of the log axis is consistent with the movement direction of the sawing device, and then fixed by the clamping mechanism. After the log is clamped, the mobile sawing device performs a reciprocating feed movement along the track on the log clamping device to saw the log.

As shown in Figures 2 and 3, the mobile sawing device is mainly composed of a saw frame 4, a horizontal saw head assembly 5, a vertical saw head assembly 6, a saw head lifting mechanism 7, and a saw frame reciprocating mechanism 8. The saw frame 4 is welded by section steel, and the bottom of the saw frame is provided with four rollers 9, and the whole saw frame is supported on two guide rails of the log clamping device by the rollers 9, so as to realize reciprocating motion. The horizontal sawing head assembly 5 includes a horizontal circular saw blade, a main motor, a sliding seat, a horizontal guide rail, a servo motor, a ball screw pair, and the like. The circular saw blade is directly installed on the shaft of the main motor, the main motor is installed on the sliding seat, and the sliding seat is supported on the horizontal track, driven by the servo motor through the ball screw pair to realize the horizontal feeding. The structural composition of the vertical sawing head assembly 6 is basically the same as that of the horizontal sawing head assembly 5, and is also driven by a servo motor through a ball screw pair to realize horizontal feeding. The two sawing head assemblies can respectively realize the feed in the horizontal direction, and can also realize the synchronous feed in the horizontal direction. There is an adjusting lead screw 10 on the vertical sawing head assembly 6 to adjust its height position so that the projections of the edges of the cutting parts of the two saw blades on the log cross-section just intersect at one point. The horizontal sawing head assembly 5 and the vertical sawing head assembly 6 are connected as a whole, supported on the vertical track 11, and driven by the servo motor on the sawing head lifting mechanism 7 through the chain transmission 12 and two vertical ball screw pairs 13 to realize feed in the vertical direction. Saw frame reciprocating mechanism 8 drives rotating shaft 15 by reduction motor through chain drive 14, and the two ends of rotating shaft 15 are fixedly installed with a sprocket 16 respectively, and chain 17 bypasses sprocket 16 and guide wheel 18, and the two ends of chain 17 are fixed on On the rack of the log clamping device. Since the chain 17 does not rotate, so when the sprocket 16 rotates, the whole sawing device will move along the guide rail of the clamping device, thereby realizing sawing. The reciprocating speed of the saw frame can be adjusted by frequency conversion according to the hardness of logs and other factors. The circular saw blade is clamped on the motor shaft by a single-sided chuck through a countersunk head screw.

As shown in FIG. 5 , the log horizontal centering mechanism is mainly composed of a support rod 19 , a swing rod 20 , an oil cylinder 21 , an oil cylinder support 22 , a swing rod support 23 and a synchronization mechanism 24 . Fork support 23 and oil cylinder support 22 are fixed on the frame. Because the support bar 19, two fork bars 20, and the fork bar support 23 constitute a parallel four-bar linkage mechanism, when the oil cylinder 21 promotes the fork bar 20 to rotate around the fulcrum of the fork bar support 23, the support bar 91 moves in parallel. The synchronous mechanism 24 is a crank connecting rod slider mechanism, and the connecting rods on both sides share a slider, which moves up and down in the vertical guide chute. If the swing rod on one side swings first, the slider will move, and the slider drives the swing rod on the other side to swing through the connecting rod, thereby realizing the synchronous action of the swing rods on both sides. Due to the effect of the synchronous mechanism 24, the support rods 19 on both sides can also move synchronously and parallelly, thereby lifting the log and realizing the centering adjustment of the log. The angle formed by the contact surfaces of the two support rods and the log is 90°. There are two sets of centering mechanisms on the clamping device, which can realize the horizontal centering adjustment of the logs on the two sections at the same time, thus ensuring that the projection of the log axis in the horizontal plane is at the center of the clamping device, and then the oil cylinder is reversed. The action puts the log down. If the shape of the log is ideal and cylindrical, it can be clamped and sawed after being adjusted by the centering mechanism.

As shown in Figure 6, log jacking mechanism is made up of top plate 25, the vertical guide mechanism 26 of top plate, oil cylinder 27 and oil cylinder support 28. The mechanism is set at the small diameter end of the log in the log clamping area. In order to adapt to different log lengths, there are two sets of jacking mechanisms. If the shape of the log is sharper, it needs to be adjusted in the vertical direction to adjust the axis of the log to a horizontal state. When the oil cylinder 28 drives the top plate 25 to move upwards, the small diameter end of the log is gradually lifted up so that the axis of the log is in a horizontal state, and then the log is clamped.

As shown in Figure 7, log clamping mechanism is mainly made up of claw 29, claw track 30, fork 31, oil cylinder 32, fork support 33 and guide seat 34 etc. for fork support to move up and down. The claw track 30 and the guide seat 34 are fixed on the frame, and the claw 29 moves horizontally along the claw track 30 . When the piston rod of the oil cylinder 32 stretches out, the swing rod 31 will swing around the fulcrum on the support 33, thereby driving the claw 29 to move outward along the track 30, so that the claw is opened; otherwise, the claw is closed. Since the swing rod 31 is in the swing process, the vertical position of the swing rod support 33 changes. When the claws are fully closed and fully opened, the position of the swing link support 33 is the highest; and when the swing link swings to a vertical state, the position of the swing link support 33 is the lowest. In order to adapt to this change, the swing rod support 33 needs to be able to vertically lift along with the swing of the swing rod, and the swing rod support 33 is supported on the guide seat 34 by two guide pins. A total of seven sets of log clamping mechanisms are arranged on the log clamping device.

Claims (5)

1. A circular sawing machine for quarter-sawn boards, mainly composed of a mobile sawing device and a log clamping device; it is characterized in that: the mobile sawing device is provided with a horizontal sawing head assembly (5) and a vertical saw The cutting head assembly (6); the log clamping device is provided with a log horizontal centering mechanism (1), a log jacking mechanism (2) and a log clamping mechanism (3). 2. The circular sawing machine for quarter-sawn lumber according to claim 1, the mobile sawing device mainly consists of a saw frame (4), a horizontal sawing head assembly (5), a vertical sawing head assembly (6), a saw It is composed of cutting head lifting mechanism (7), saw frame reciprocating mechanism (8), etc., and four rollers (9) are arranged at the bottom of the saw frame, so that the entire saw frame is supported on the two guide rails of the log clamping device; its features are: The horizontal sawing head assembly (5) includes a horizontal circular saw blade, main motor, sliding seat, horizontal guide rail, servo motor, ball screw pair, etc.; the circular saw blade is directly installed on the main motor shaft, and the main motor is installed on the sliding seat , the sliding seat is supported on the horizontal rail, and is driven by the servo motor through the ball screw pair to realize the feeding in the horizontal direction; the structure of the vertical sawing head assembly (6) is basically the same as that of the horizontal sawing head assembly (5). The servo motor is driven by the ball screw pair to realize the feed in the horizontal direction; the vertical sawing head assembly (6) has an adjusting screw (10) to adjust its height; the horizontal sawing head assembly (5) is connected with the vertical sawing head The head assembly (6) is connected as a whole, supported on the vertical track (11), driven by the servo motor on the sawing head lifting mechanism (7) through the chain drive (12) and two vertical ball screw pairs (13), to realize Feed in the vertical direction; the reciprocating motion mechanism (8) of the saw frame is driven by a geared motor through a chain drive (14) to drive the shaft (15), and a sprocket (16) and a chain (17) are respectively fixed at both ends of the shaft (15). Bypassing the sprocket (16) and the guide wheel (18), the two ends of the chain (17) are fixed on the frame of the log clamping device without rotary motion, and the sawing device moves along the guide rail of the clamping device to realize sawing . 3. The circular sawing machine for quarter-cutting boards according to claim 1, the log horizontal centering mechanism (1) is mainly composed of a support rod (19), a swing rod (20), an oil cylinder (21), and an oil cylinder support (22) ), a swing rod support (23) and a synchronous mechanism (24); it is characterized in that: the swing rod support (23) and the oil cylinder support (22) are fixed on the frame; the support rod (19), two swing rods (20), the swing rod support (23) constitutes a parallel four-bar linkage mechanism, when the oil cylinder (21) pushes the swing rod (20) to rotate around the fulcrum of the swing rod support (23), the supporting rod (19) moves in parallel ; Synchronization mechanism (24) is a crank-link slider mechanism, and the connecting rods on both sides share a slider, which moves up and down in the vertical guide chute; as the fork on one side swings earlier, the slider will move, and pass The connecting rod drives the swing rod on the other side to swing, thereby realizing the synchronous action of the swing rods on both sides; the synchronization mechanism (24) enables the support rods (19) on both sides to move synchronously and in parallel, and the log is lifted to realize the horizontal movement of the log. Centering adjustment: There are two sets of log horizontal centering mechanisms. At the same time, the log is adjusted in the horizontal direction on the two sections to ensure that the projection of the log axis in the horizontal plane is at the center of the clamping device, and then the oil cylinder (21) The reverse motion puts the log down. 4. according to claim 1, the circular saw machine for lumber making of quarter-cutting boards, the log jacking mechanism (2) mainly consists of a top plate (25), a vertical guide mechanism (26) of the top plate, an oil cylinder (27) and an oil cylinder support ( 28) Composition; it is characterized in that the jacking mechanism is arranged at the small diameter end of the log in the log clamping area. In order to adapt to different log lengths, two sets of jacking mechanisms are provided; when the oil cylinder (27) drives the top plate (25) to move upward , gradually jack up the small diameter end of the log, adjust the axis of the log to be horizontal, and then clamp the log. 5. According to the circular saw machine for quarter-cutting boards according to claim 1, the log clamping mechanism (3) mainly consists of claws (29), claw tracks (30), swing rods (31), oil cylinders (32), The swing rod support (33) and the guide seat (34) for the swing rod support to move up and down are composed; it is characterized in that: the claw track (30) and the guide seat (34) are fixed on the frame, and the claw (29) Move horizontally along the claw track (30); when the piston rod of the oil cylinder (32) stretches out, the swing rod (31) will swing around the fulcrum on the support (33), thereby driving the claw (29) to move along the track. Move outside to make the claws open; otherwise, the claws are closed; the swing rod support (33) vertically lifts with the swing of the swing rod, and the swing rod support (33) is supported on the guide seat (34) by two guide pins. Above; seven sets of log clamping mechanisms are arranged on the log clamping device.

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