A log cutting machine

Abstract

This utility model belongs to the field of round log cutting technology, specifically a round log cutting machine, including a working plate and a clamping assembly including a moving plate. The moving plate has a groove, and a sliding plate is installed on the slider. A first clamping plate is fixedly installed on the sliding plate, and a second clamping plate is slidably connected to the sliding plate. The moving plate drives the round log clamped on it to move longitudinally and horizontally. When it passes the saw wheel, it is quickly cut by the saw wheel. Then, the moving plate drives the round log clamped on it to move back to the starting position. Afterward, the second clamping plate and the first clamping plate drive the round log clamped on it to move laterally and horizontally towards the band saw blade. The horizontal movement distance is the thickness of the board, which realizes precise position adjustment of the round log. Then, the above steps are repeated to continuously cut the round log longitudinally. During this process, the thickness of the board cut from the round log is precisely controlled, and the round log is always in a stable state during the cutting process, which is beneficial to improving the uniformity of the board thickness and improving the cutting quality.

Description

Technical Field

[0001] This utility model relates to the field of round wood cutting technology, specifically a round wood cutting machine. Background Technology

[0002] A log cutter is a mechanical device used to cut logs into different specifications, such as boards, square timber, and strips. It is widely used in industries such as wood processing, furniture manufacturing, and construction. A log cutter is required when cutting logs into boards.

[0003] A Chinese patent with authorization announcement number CN 219987903 U discloses a round log cutting machine. This utility model includes a worktable and a support base. The bottom end of the support base is fixedly connected to the upper left side of the worktable. The left side of the worktable is horizontal, the right side is inclined, and the right side of the worktable tilts downwards to the left. The front outer wall of the worktable is fixedly connected to a second motor, and the output shaft end of the second motor is fixedly connected to a feeding roller. A booster tooth is fixedly connected to the outer wall of the feeding roller. The feeding roller is embedded inside the upper part of the worktable and is rotatably connected to the upper part of the worktable. This utility model eliminates the need for manual intervention in the placement of round logs, saving time and manpower.

[0004] Existing cutting machines have difficulty controlling the thickness of the cut boards during the cutting process of round logs, and the stability of the round logs is poor during the cutting process, resulting in poor uniformity of board thickness and affecting the cutting quality; therefore, a round log cutting machine is proposed to address the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology and solve the problems existing in the existing technology, this utility model proposes a round wood cutting machine.

[0006] The technical solution adopted by this utility model to solve its technical problem is a round log cutting machine, including a working plate, a PLC controller mounted on the working plate, a feeding assembly mounted on the working plate, a clamping assembly connected to the feeding assembly, the clamping assembly including a movable plate, on which round logs are placed, a sliding groove is formed in the movable plate, a first stepper motor is mounted on the side wall of the movable plate via a machine base, a first lead screw is mounted on the output shaft of the first stepper motor, the first lead screw is rotatably mounted on the inner wall of the sliding groove, a slider is assembled in the sliding groove, a sliding plate is mounted on the slider, a first clamping plate is fixedly mounted on the sliding plate, and a second clamping plate is slidably connected to the sliding plate. The plate includes a mounting plate, on which a clamping block is fixedly mounted. A groove is formed within the mounting plate and clamping block. A limit plate is fitted within the groove. An electric telescopic rod is fixedly mounted on the side wall of the mounting plate. The actuating rod of the electric telescopic rod is fixedly connected to the limit plate. A first displacement sensor is fixedly mounted within the groove. A second displacement sensor is mounted on the sliding plate, corresponding to the position of the sliding plate. The second displacement sensor and the two first displacement sensors are connected to a PLC controller via an internal circuit. A guide groove is formed within the sliding plate. A screw is rotatably mounted on the inner wall of the guide groove. A knob is mounted at one end of the screw. A guide block is fitted within the guide groove. A block is fixedly connected to a second clamping plate, which has the same structure as the first clamping plate. A feeding assembly is installed on the working plate, including a moving groove. A second stepper motor is mounted on the side wall of the working plate via a base. A second lead screw is mounted on the output shaft of the second stepper motor. A moving block is assembled in the moving groove, and the moving block is fixedly connected to the moving plate. The second stepper motor, the first stepper motor, and the electric telescopic rod are connected to a PLC controller through an internal circuit. A cutting assembly is installed on one side of the working plate, including a support frame. A connecting plate is fixedly installed on the support frame, and the connecting plate is fixedly connected to the working plate. A fixing plate is fixedly connected to the connecting plate. Two saw wheels are mounted on a rotating shaft, and band saw blades are fitted around the two saw wheels. The band saw blades are annular and endless. A through hole is opened on the connecting plate, through which the band saw blade passes. A drive motor is mounted on the side wall of the support frame via a base. One end of the drive motor is fixedly connected to the rotating shaft of one of the saw wheels. The moving plate drives the log held on it to move longitudinally and horizontally, realizing rapid feeding of the log. When it passes the saw wheel, it is quickly cut by the saw wheel. Then the moving block drives the log held on it to move back to the starting position. After that, the second clamping plate and the first clamping plate drive the log held on it to move laterally and horizontally towards the band saw blade. The distance of horizontal movement is the thickness of the board, realizing precise position adjustment of the log.The above steps are then repeated, with the log being continuously cut longitudinally. During this process, the thickness of the cut boards is precisely controlled, and the log remains stable throughout the cutting process, which helps improve the uniformity of the board thickness and thus enhances the cutting quality.

[0007] Preferably, the first lead screw, the actuating rod of the electric telescopic rod, the screw rod, and the second lead screw are all equipped with nylon protective covers. The nylon protective covers are made of nylon cloth and have a telescopic cylindrical structure. Two nylon protective covers are installed around the first lead screw. One end of each nylon protective cover is fixedly connected to the side wall of the slider, and the other end of each nylon protective cover is fixedly connected to the inner wall of the slide groove. Because the first lead screw, the actuating rod of the electric telescopic rod, the screw rod, and the second lead screw are always wrapped by the nylon protective covers, wood dust will not penetrate into the first lead screw, the actuating rod of the electric telescopic rod, the screw rod, and the second lead screw, and there will be no situation of accelerated wear, decreased accuracy, jamming, or even damage. This is beneficial to improving the protection of the cutting machine.

[0008] The advantages of this utility model are:

[0009] 1. This utility model achieves rapid feeding of the log by moving the movable plate to drive the log held on it to move longitudinally and horizontally. When passing the saw wheel, the log is quickly cut by the saw wheel. Then, the movable block moves the log held on it back to the starting position. After that, the second clamping plate and the first clamping plate move the log held on them laterally and horizontally towards the band saw blade. The distance of horizontal movement is the thickness of the board, which realizes precise position adjustment of the log. Then, the above steps are repeated to continuously cut the log longitudinally. During this process, the thickness of the board cut from the log is precisely controlled, and the log remains in a stable state throughout the cutting process, which is beneficial to improving the uniformity of the board thickness and improving the cutting quality.

[0010] 2. This utility model ensures that the first lead screw, the electric telescopic rod, the screw, and the second lead screw are always encased in a nylon protective cover. This prevents wood dust from entering the first lead screw, the electric telescopic rod, the screw, and the second lead screw, thus avoiding accelerated wear, decreased precision, jamming, or even damage. This is beneficial for improving the protection of the cutting machine. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a first-person perspective 3D structural diagram;

[0013] Figure 2 This is a schematic diagram of the three-dimensional structure of the movable plate;

[0014] Figure 3 This is a schematic diagram of the three-dimensional structure of the first clamping plate;

[0015] Figure 4 This is a schematic diagram of the three-dimensional structure of the work board;

[0016] Figure 5 This is a schematic diagram of the three-dimensional structure of the band saw blade.

[0017] In the diagram: 1. Working board; 2. PLC controller; 3. Moving plate; 301. Slide groove; 302. First stepper motor; 303. First lead screw; 304. Slider; 305. Sliding plate; 306. Second displacement sensor; 4. First clamping plate; 401. Mounting plate; 402. Clamping block; 403. Plate groove; 404. Limiting plate; 405. Electric telescopic rod; 406. First displacement sensor; 5. Second clamping plate; 6. Guide groove; 601. Screw; 602. Guide block; 7. Moving groove; 701. Second stepper motor; 702. Second lead screw; 703. Moving block; 8. Support frame; 801. Connecting plate; 802. Fixing plate; 803. Saw wheel; 804. Band saw blade; 805. Drive motor; 9. Log; 10. Nylon protective cover. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0019] Please see Figure 1-5As shown, a round log cutting machine includes a working plate 1, a PLC controller 2 mounted on the working plate 1, a feeding assembly mounted on the working plate 1, and a clamping assembly connected to the feeding assembly. The clamping assembly includes a movable plate 3, on which round logs 9 are placed. A sliding groove 301 is formed inside the movable plate 3. A first stepper motor 302 is mounted on the side wall of the movable plate 3 via a machine base. A first lead screw 303 is mounted on the output shaft of the first stepper motor 302. The first lead screw 303 is rotatably mounted on the inner wall of the sliding groove 301. A slider 304 is assembled inside the sliding groove 301. A sliding plate 305 is mounted on the slider 304. A first clamping plate 4 is fixedly mounted on the sliding plate 305. A sliding connection is made on the sliding plate 305. The first clamping plate 4 includes a mounting plate 401, a clamping block 402 fixedly mounted on the mounting plate 401, a plate groove 403 formed in the mounting plate 401 and the clamping block 402, a limiting plate 404 assembled in the plate groove 403, an electric telescopic rod 405 fixedly mounted on the side wall of the mounting plate 401, the actuating rod of the electric telescopic rod 405 fixedly connected to the limiting plate 404, a first displacement sensor 406 fixedly mounted in the plate groove 403, a second displacement sensor 306 mounted on the moving plate 3, the second displacement sensor 306 corresponding to the position of the sliding plate 305, and the second displacement sensor 306 and the two first displacement sensors 406 connected to the PLC controller 2 through an internal circuit. Next, a guide groove 6 is provided inside the sliding plate 305. A screw 601 is rotatably installed on the inner wall of the guide groove 6. A knob is installed at one end of the screw 601. A guide block 602 is assembled inside the guide groove 6. The guide block 602 is fixedly connected to the second clamping plate 5. The second clamping plate 5 has the same structure as the first clamping plate 4. A feeding assembly is installed on the working plate 1. The feeding assembly includes a moving groove 7. A second stepper motor 701 is installed on the side wall of the working plate 1 through a machine base. A second lead screw 702 is installed on the output shaft of the second stepper motor 701. A moving block 703 is assembled inside the moving groove 7. The moving block 703 is fixedly connected to the moving plate 3. The second stepper motor 701, the first stepper motor 302, and the electric telescopic rod 4 are all included. 05 is connected to PLC controller 2 through internal circuit. A cutting assembly is installed on one side of the working plate 1. The cutting assembly includes a support frame 8. A connecting plate 801 is fixedly installed on the support frame 8. The connecting plate 801 is fixedly connected to the working plate 1. A fixing plate 802 is fixedly connected to the connecting plate 801. Two saw wheels 803 are rotatably installed on the fixing plate 802 through a rotating shaft. A band saw blade 804 is sleeved around the two saw wheels 803. The band saw blade 804 has an annular endless structure. A through hole is opened on the connecting plate 801. The band saw blade 804 passes through the through hole. A drive motor 805 is installed on the side wall of the support frame 8 through a machine base. One end of the drive motor 805 is fixedly connected to the rotating shaft of one of the saw wheels 803.During operation, existing cutting machines struggle to control the thickness of the cut boards from logs 9, and the logs 9 exhibit poor stability during cutting, resulting in uneven board thickness and affecting cutting quality. By placing the logs 9 on the moving plate 3, and considering the limited cutting length of the band saw blade 804, the length and radius of the logs 9 are pre-cut to meet the machine's specifications before being slit into boards. Rotating the knob drives the screw 601 to rotate. The screw 601 is self-locking; when the thread helix angle is less than the friction angle, sliding friction causes the screw 601 to self-lock, preventing the guide block 602 from driving the screw 601 to rotate in the opposite direction. 1. The guide block 602 on it moves horizontally, and the guide block 602 moves the second clamping plate 5 horizontally. The second clamping plate 5 and the first clamping plate 4 cooperate to clamp and fix the log 9. The two clamping blocks 402 on the second clamping plate 5 and the first clamping plate 4 fix and clamp the two sides of the log 9, while the two limiting plates 404 only contact the two sides of the log 9 and limit the two sides of the log 9 without applying clamping force to the two sides of the log 9. This structure ensures the stability of the log 9 by clamping it. At the same time, the limiting plates 404 increase the limiting area of ​​the log 9. When the log 9 is cut longitudinally, the two limiting plates 404 can improve the longitudinal stability of the log 9.

[0020] During the cutting of log 9, the second stepper motor 701 operates, driving the second lead screw 702 to rotate. The second lead screw 702 drives the moving block 703 to move horizontally, the moving block 703 drives the moving plate 3 to move horizontally, and the moving plate 3 drives the log 9 clamped on it to move longitudinally horizontally, realizing the rapid feeding of log 9. When passing the saw wheel 803, the drive motor 805 operates, driving one of the saw wheels 803 to rotate. The saw wheel 803 drives the band saw blade 804 to rotate, and the band saw blade 804 drives the other saw wheel 803 to rotate, realizing the stable rotation of the band saw blade 804. The band saw blade 804 will perform unidirectional continuous linear motion at the cutting point of log 9 to achieve sawing. Log 9 moves longitudinally horizontally and is quickly cut by saw wheel 803.

[0021] Then, the second stepper motor 701 operates again, driving the moving block 703 to move horizontally in the opposite direction. The moving block 703 moves the log 9 clamped on it back to the starting position. The second displacement sensor 306 and the two first displacement sensors 406, model CP1H-X40DT-D, input the thickness value of the board into the PLC controller 2. Then, the first stepper motor 302 operates, driving the first lead screw 303 to rotate. The first lead screw 303 drives the slider 304 on it to move horizontally. The slider 304 drives the sliding plate 305 to move horizontally. The sliding plate 305 drives the second clamping plate 5 and the first clamping plate 4 on it. The second clamping plate 5 and the first clamping plate 4 move horizontally, causing the log 9 clamped on them to move horizontally towards the band saw blade 804. During this process, the second displacement sensor 306 checks the moving distance of the sliding plate 305 in real time and provides real-time feedback on the moving distance of the sliding plate 305 to the PLC controller 2. When the moving distance value is the same as the plate thickness value, the PLC controller 2 will send a command to the power switch of the first stepper motor 302 to cut off the drive power of the first stepper motor 302. At this time, the distance that the log 9 moves horizontally towards the band saw blade 804 is the plate thickness value, thus realizing the precise position adjustment of the log 9.

[0022] Then, the PLC controller 2 controls the two electric telescopic rods 405 to operate. The rods on them drive the limit plate 404 to retract into the plate groove 403. During this process, the first displacement sensor 406 checks the retraction distance of the limit plate 404 in real time and feeds back the retraction distance of the limit plate 404 to the PLC controller 2 in real time. When the retraction distance value is the same as the plate thickness value, the PLC controller 2 will send a command to the power switch of the electric telescopic rod 405 to cut off the drive power of the electric telescopic rod 405, thereby realizing the retraction of the limit plate 404.

[0023] Then, the above steps are repeated to continuously cut the log 9 longitudinally. During this process, the thickness of the board cut by the log 9 is precisely controlled, and the log 9 remains in a stable state throughout the cutting process, which helps to improve the uniformity of the board thickness and improve the cutting quality.

[0024] Please see Figure 1As shown, the first lead screw 303, the actuating rod of the electric telescopic rod 405, the screw 601, and the second lead screw 702 are all equipped with nylon protective covers 10. The nylon protective covers 10 are made of nylon cloth and have a telescopic cylindrical structure. Two nylon protective covers 10 are installed around the first lead screw 303. One end of each nylon protective cover 10 is fixedly connected to the side wall of the slider 304, and the other end is fixedly connected to the inner wall of the slide groove 301. During operation, existing cutting machines generate sawdust during the cutting process of round logs 9, which easily affects the usability of the lead screw and other structures. Because it is difficult to clean the sawdust, it leads to… The protection of the cutting machine is poor. By installing a nylon protective cover 10 around the first lead screw 303, the actuating rod of the electric telescopic rod 405, the screw 601, and the second lead screw 702, the nylon protective cover 10 is made of nylon cloth and has a telescopic cylindrical structure. The first lead screw 303, the actuating rod of the electric telescopic rod 405, the screw 601, and the second lead screw 702 are always wrapped by the nylon protective cover 10. Wood chips and dust will not enter the first lead screw 303, the actuating rod of the electric telescopic rod 405, the screw 601, and the second lead screw 702, and there will be no situation of accelerated wear, decreased accuracy, jamming, or even damage. This helps to improve the protection of the cutting machine.

[0025] Working principle: Existing cutting machines struggle to control the thickness of the cut boards from logs 9 during the cutting process, and the logs 9 exhibit poor stability, resulting in uneven board thickness and affecting cutting quality. By placing the logs 9 on the moving plate 3, and considering the limited cutting length of the band saw blade 804, the length and radius of the logs 9 are pre-cut to meet the specifications of the cutting machine before being slit into boards. Rotating the knob drives the screw 601 to rotate. The screw 601 has self-locking properties, meaning that when the thread helix angle is less than the friction angle, the screw... Dynamic friction causes the screw 601 to self-lock, preventing the guide block 602 from driving the screw 601 to rotate in the opposite direction. The screw 601 drives the guide block 602 to move horizontally, and the guide block 602 drives the second clamping plate 5 to move horizontally. The second clamping plate 5 and the first clamping plate 4 cooperate to clamp and fix the log 9. The two clamping blocks 402 on the second clamping plate 5 and the first clamping plate 4 fix and clamp the two sides of the log 9, while the two limiting plates 404 only contact the two sides of the log 9, limiting the two sides of the log 9 without applying clamping force to the two sides of the log 9. This structure, through the clamping of the log 9, Clamping ensures the stability of the log 9, while the setting of limiting plates 404 increases the limiting area of ​​the log 9. When the log 9 is cut longitudinally, the two limiting plates 404 can improve the longitudinal stability of the log 9. During the cutting process of the log 9, the operation of the second stepper motor 701 drives the second lead screw 702 to rotate. The second lead screw 702 drives the moving block 703 to move horizontally. The moving block 703 drives the moving plate 3 to move horizontally. The moving plate 3 drives the log 9 clamped on it to move longitudinally and horizontally, realizing the rapid feeding of the log 9. After sawing When wheel 803 is in operation, the drive motor 805 operates, driving one of the saw wheels 803 to rotate. The saw wheel 803 drives the band saw blade 804 to rotate, and the band saw blade 804 drives the other saw wheel 803 to rotate, thus achieving stable rotation of the band saw blade 804. The band saw blade 804 will perform unidirectional continuous linear motion at the cutting point of the log 9 to achieve sawing. The log 9 moves horizontally in the longitudinal direction and is quickly cut by the saw wheel 803. Afterwards, the second stepper motor 701 operates again, driving the moving block 703 to move horizontally in the opposite direction. The moving block 703 drives the log 9 clamped on it to move back to the starting position.The second displacement sensor 306 and the two first displacement sensors 406, model CP1H-X40DT-D, input the thickness value of the board material into the PLC controller 2. Then, the first stepper motor 302 operates, driving the first lead screw 303 to rotate. The first lead screw 303 drives the slider 304 on it to move horizontally laterally. The slider 304 drives the sliding plate 305 to move horizontally laterally. The sliding plate 305 drives the second clamping plate 5 and the first clamping plate 4 on it to move horizontally laterally. The second clamping plate 5 and the first clamping plate 4 drive the log 9 held on them to move horizontally laterally towards the band saw blade 804. During this process, the second displacement sensor 306 monitors the movement distance of the sliding plate 305 in real time. The system checks the sliding plate 305's movement distance and provides real-time feedback to the PLC controller 2. When the movement distance matches the plate thickness, the PLC controller 2 sends a command to the power switch of the first stepper motor 302 to cut off its drive power. At this point, the log 9 moves horizontally towards the band saw blade 804 by the distance equal to the plate thickness, achieving precise position adjustment of the log 9. Afterward, the PLC controller 2 controls the two electric telescopic rods 405, whose actuators retract the limit plate 404 into the slot 403. During this process, the first displacement sensor 406 checks the retraction distance of the limit plate 404 in real-time and provides real-time feedback to the PLC controller 2. The feedback limit plate 404 retraction distance is monitored. When the retraction distance is equal to the plate thickness, the PLC controller 2 sends a command to the power switch of the electric telescopic rod 405 to cut off the drive power of the electric telescopic rod 405, thus achieving the retraction of the limit plate 404. The above steps are then repeated, and the log 9 is continuously cut longitudinally. During this process, the thickness of the cut plate is precisely controlled, and the log 9 remains stable throughout the cutting process, which helps improve the uniformity of the plate thickness and thus improves the cutting quality. Existing cutting machines, during the cutting process of the log 9, generate sawdust, which can easily affect the usability of the lead screw and other structures. The difficulty in cleaning wood dust results in poor protection for the cutting machine. By installing nylon protective covers 10 around the first lead screw 303, the actuating rod of the electric telescopic rod 405, the screw 601, and the second lead screw 702, these components are always enclosed by the nylon protective covers 10. This prevents wood dust from penetrating these components, avoiding accelerated wear, decreased precision, jamming, or even damage, thus improving the protection of the cutting machine.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A log cutting machine characterized by: The system includes a work board (1), on which a PLC controller (2) is mounted, and a feeding assembly is mounted on the work board (1). A clamping assembly is connected to the feeding assembly. The clamping assembly includes a movable plate (3), on which a log (9) is placed. A sliding groove (301) is formed inside the movable plate (3). A first stepper motor (302) is mounted on the side wall of the movable plate (3) via a base. A first lead screw (303) is mounted on the output shaft of the first stepper motor (302). The first lead screw (303) is rotatably mounted on the inner wall of the sliding groove (301). A slider (304) is assembled inside the sliding groove (301). A sliding plate (305) is mounted on the slider (304). A first clamping plate (4) is fixedly mounted on the sliding plate (305). A second clamping plate (5) is slidably connected to the sliding plate (305). The first clamping plate (4) includes a mounting plate (401). A clamping block (402) is fixedly installed on the mounting plate (401). A plate groove (403) is opened in the mounting plate (401) and the clamping block (402). A limiting plate (404) is assembled in the plate groove (403). An electric telescopic rod (405) is fixedly installed on the side wall of the mounting plate (401). The actuating rod of the electric telescopic rod (405) is fixedly connected to the limiting plate (404). A first displacement sensor (406) is fixedly installed in the plate groove (403).

2. A log cutting machine according to claim 1, characterized in that: A second displacement sensor (306) is installed on the movable plate (3). The second displacement sensor (306) corresponds to the position of the sliding plate (305). The second displacement sensor (306) and two first displacement sensors (406) are connected to the PLC controller (2) through internal circuits.

3. A log cutting machine according to claim 1, characterized in that: The sliding plate (305) has a guide groove (6) inside. A screw (601) is rotatably installed on the inner wall of the guide groove (6). A knob is installed at one end of the screw (601). A guide block (602) is assembled inside the guide groove (6). The guide block (602) is fixedly connected to the second clamping plate (5). The second clamping plate (5) has the same structure as the first clamping plate (4).

4. A log cutting machine according to claim 1, characterized in that: The work plate (1) is equipped with a feeding assembly, which includes a moving groove (7). A second stepper motor (701) is mounted on the side wall of the work plate (1) via a base. A second lead screw (702) is mounted on the output shaft of the second stepper motor (701). A moving block (703) is assembled in the moving groove (7). The moving block (703) is fixedly connected to the moving plate (3). The second stepper motor (701), the first stepper motor (302), and the electric telescopic rod (405) are connected to the PLC controller (2) through internal circuits.

5. A log cutting machine according to claim 1, characterized in that: A cutting assembly is installed on one side of the working plate (1). The cutting assembly includes a support frame (8). A connecting plate (801) is fixedly installed on the support frame (8). The connecting plate (801) is fixedly connected to the working plate (1). A fixing plate (802) is fixedly connected to the connecting plate (801). Two saw wheels (803) are rotatably installed on the fixing plate (802) via a rotating shaft. A band saw blade (804) is sleeved around the two saw wheels (803). The band saw blade (804) is an annular, endless structure. A through hole is opened on the connecting plate (801). The band saw blade (804) passes through the through hole. A drive motor (805) is installed on the side wall of the support frame (8) via a base. One end of the drive motor (805) is fixedly connected to the rotating shaft of one of the saw wheels (803).

6. A log cutting machine according to claim 1, characterized in that: The first lead screw (303), the actuating rod of the electric telescopic rod (405), the screw (601), and the second lead screw (702) are all equipped with nylon protective covers (10). The nylon protective covers (10) are made of nylon cloth and have a telescopic cylindrical structure. Two nylon protective covers (10) are installed around the first lead screw (303). One end of the two nylon protective covers (10) is fixedly connected to the side wall of the slider (304), and the other end of the two nylon protective covers (10) is fixedly connected to the inner wall of the slide groove (301).

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