Abrasive cloth slicing machine head

Abstract

The utility model discloses a machine head of an abrasive cloth slicing machine, which relates to the technical field of abrasive cloth processing equipment and comprises a machine head main plate, a front suspension arm and a rear suspension arm are rotatably connected to the front side and the rear side of the upper portion of the machine head main plate respectively, and an eccentric shaft driven by an external motor is arranged in the middle of the lower portion of the machine head main plate. The eccentric shaft is fixedly provided with a front cam and a rear cam which are opposite to each other, the two cams of the eccentric shaft are respectively sleeved with a front connecting rod and a rear connecting rod, the front connecting rod is rotationally connected with the lower end of the front lifting arm, and the rear connecting rod is rotationally connected with the rear lifting arm; the lower end of the front suspension arm is provided with a movable knife rest, the front side of the movable knife rest is provided with a fixed knife rest, and the movable knife rest and the fixed knife rest are respectively provided with meshed blades; the structure has the beneficial effects that the structure that the eccentric shaft symmetrically drives the front lifting arm and the rear lifting arm to swing at the same time on the two sides is small in vibration, long in service life and low in maintenance cost.

Description

Technical Field

[0001] This utility model relates to the technical field of abrasive cloth processing equipment, and in particular to a head for an abrasive cloth slicing machine. Background Technology

[0002] In the abrasive cloth manufacturing industry, abrasive cloth slicing is a crucial step. Traditional abrasive cloth slicing equipment has revealed numerous problems in long-term production practice, severely restricting the improvement of production efficiency and product quality.

[0003] Early abrasive cloth cutting machines mostly used a simple single-blade cutting structure, relying on manual operation to push the abrasive cloth for cutting. This method was not only extremely labor-intensive, but the cutting accuracy also depended entirely on the operator's experience and skill, making it difficult to guarantee product consistency. In actual production, problems such as large deviations in cutting dimensions and uneven edges often occurred, resulting in a large number of defective products and increased production costs.

[0004] With technological advancements, mechanically driven slicing machines have emerged. However, these devices suffer from structural design flaws, with most employing a single-sided drive to move the cutting blade. This single-sided drive results in uneven force distribution during cutting, causing severe vibrations during operation. Prolonged vibration not only causes significant wear and tear on the equipment's components, drastically shortening its lifespan, but also significantly increases maintenance frequency and costs. Frequent maintenance leads to production interruptions, further impacting efficiency and causing substantial economic losses for businesses.

[0005] Meanwhile, traditional slicing machines also have shortcomings in their feeding systems. The feeding speed is difficult to control precisely, easily resulting in feeding too fast or too slow. Feeding too fast leads to insufficient cutting and poor cut quality of the abrasive cloth; feeding too slow reduces production efficiency. Furthermore, traditional feeding systems cannot adapt to different specifications and materials of abrasive cloth, lacking flexibility and limiting the application range of the slicing machine.

[0006] Furthermore, the safety measures of traditional abrasive cloth slicing machines are relatively rudimentary, posing certain safety risks to operators during operation, such as the risk of hand injury from the cutting blades. These problems seriously hinder the development of the abrasive cloth production industry, urgently requiring a new type of abrasive cloth slicing machine head to solve these problems and meet the demands of modern production for high efficiency, precision, and stability. Utility Model Content

[0007] The purpose of this utility model is to provide a cutting head for a sandpaper slicer in order to solve the above-mentioned problems.

[0008] This utility model achieves the above objectives through the following technical solutions:

[0009] A shaving head for an abrasive cloth slicer includes a main board. A front arm and a rear arm are rotatably connected to the front and rear sides of the upper part of the main board. An eccentric shaft driven by an external motor is disposed in the middle of the lower part of the main board. Two opposing cams are fixedly mounted on the eccentric shaft. A front connecting rod and a rear connecting rod are respectively sleeved on the two cams of the eccentric shaft. The front connecting rod is rotatably connected to the lower end of the front arm, and the rear connecting rod is rotatably connected to the rear arm. A movable blade holder is disposed at the lower end of the front arm, and a fixed blade holder is disposed on the front side of the movable blade holder. Interlocking blades are respectively mounted on the movable blade holder and the fixed blade holder.

[0010] Preferably, a belt box is provided above the moving blade holder and the fixed blade holder, and a belt frame is connected to the upper end of the belt box. The belt frame is fixedly installed on the main board of the machine head. The abrasive cloth enters the belt frame from the external feeding mechanism and then passes through the belt box.

[0011] Preferably, the belt box has a through hole running from front to back, and a feeding wheel and a driven wheel are respectively arranged in front of and behind the through hole. The feeding wheel is driven by an external motor to pull the abrasive cloth to feed.

[0012] Preferably: the feed wheel is fixedly mounted on the feed wheel mounting shaft, the feed wheel mounting shaft is mounted on the main machine head via bearings, and the end of the feed wheel mounting shaft away from the feed wheel is fixedly connected to the output end of an external motor; the driven wheel is mounted on the driven wheel mounting shaft via bearings, the end of the driven wheel mounting shaft near the main machine head is fixedly mounted on a swing arm, the upper end of the swing arm is rotatably connected to the main machine head, and a driven wheel clamping cylinder for pushing the swing arm to swing is fixedly mounted on the side of the swing arm away from the feed wheel corresponding to the main machine head.

[0013] Preferably: the fixed tool holder is mounted on a fixed tool holder mounting base, and the fixed tool holder mounting base is mounted on the main board of the machine head; the movable tool holder is mounted on a movable tool holder mounting base, and the movable tool holder mounting base is mounted on the lower end of the front boom.

[0014] Preferably: a front boom connecting shaft is fixedly installed on the upper end of the front boom, and a front boom bearing seat is installed on the main board of the machine head corresponding to the position of the front boom connecting shaft, and the front boom connecting shaft and the front boom bearing seat are connected by a bearing; a rear boom connecting shaft is fixedly installed on the upper end of the rear boom, and a rear boom bearing seat is installed on the main board of the machine head corresponding to the position of the rear boom connecting shaft, and the rear boom connecting shaft and the rear boom bearing seat are connected by a bearing.

[0015] Preferably, the main board of the machine head is equipped with a housing for covering the eccentric shaft, the front connecting rod and the rear connecting rod; the housing is fixedly equipped with an eccentric shaft bearing seat corresponding to the position of the eccentric shaft, and the eccentric shaft and the eccentric shaft bearing seat are connected by a bearing.

[0016] Preferably, a base plate is fixedly installed at the lower end of the main machine head.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: the abrasive cloth slicer head of this utility model exhibits significant advantages through its unique eccentric shaft double-sided symmetrical drive structure.

[0018] In terms of vibration control, the eccentric shaft symmetrically drives the front and rear booms to swing simultaneously, resulting in more balanced forces on all components during operation. Compared to traditional single-sided drive structures, this symmetrical drive method significantly reduces vibration. Reduced vibration not only improves the stability of equipment operation but also avoids cutting deviations caused by vibration, ensuring cutting accuracy and resulting in more precise abrasive cloth slices with cleaner edges, thus improving product quality.

[0019] In terms of equipment lifespan, reduced vibration significantly lowers the additional stress on various components, minimizing wear and fatigue damage. Key components such as eccentric shafts, connecting rods, and booms experience significantly extended lifespans under stable operating conditions. This means companies no longer need to frequently replace equipment parts, reducing maintenance costs and downtime, and improving production efficiency.

[0020] In terms of maintenance costs, on the one hand, the extended lifespan of components directly reduces the cost of replacing parts; on the other hand, structural stability reduces the probability of equipment failure and the frequency of maintenance. Even if the equipment requires maintenance, its reasonable structural design makes the maintenance process relatively simple, allowing maintenance personnel to locate and resolve problems more quickly, further reducing maintenance costs.

[0021] In addition, the slicing machine head features a compact overall structure, occupying little space and facilitating installation and integration into existing production lines. Furthermore, its ingeniously designed feeding system allows for precise control of the feeding speed, adapting to the cutting needs of various specifications and materials of abrasive cloth, thus improving the equipment's versatility and production flexibility, and bringing greater economic benefits to enterprises. Attached Figure Description

[0022] 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.

[0023] Figure 1 This is a three-dimensional structural diagram of the head of the abrasive cloth slicing machine described in this utility model.

[0024] Figure 2 This is a schematic diagram of the internal structure of the head of the abrasive cloth slicing machine described in this utility model.

[0025] Figure 3 This is a three-dimensional structural schematic diagram of the head of the abrasive cloth slicing machine described in this utility model from another perspective.

[0026] The annotations in the attached figures are explained as follows:

[0027] 1. Main board of the machine head; 2. Front connecting rod; 3. Eccentric shaft bearing seat; 4. Eccentric shaft; 5. Rear boom; 6. Fixed blade holder; 7. Rear connecting rod; 8. Base plate; 9. Swing rod; 11. Belt box; 12. Driven wheel mounting shaft; 13. Driven wheel; 14. Fixed blade holder mounting seat; 15. Moving blade holder; 16. Moving blade holder mounting seat; 17. Housing; 20. Front boom bearing seat; 21. Rear boom bearing seat; 22. Rear boom connecting shaft; 23. Feeding wheel mounting shaft; 24. Feeding wheel; 27. Driven wheel clamping cylinder; 31. Front boom; 32. Belt frame; 33. Front boom connecting shaft. Detailed Implementation

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through the specific circumstances.

[0030] The present invention will be further described below with reference to the accompanying drawings:

[0031] like Figures 1-3 As shown, a sandpaper slicing machine head includes a machine head main board 1. The machine head main board 1 serves as the basic frame of the entire device, playing a key role in supporting and fixing other components, and ensuring that each component maintains a stable relative position during operation.

[0032] The front boom 31 and the rear boom 5 are rotatably connected to the front and rear sides of the upper part of the main board 1. When the equipment is running, the front boom 31 and the rear boom 5 are mainly responsible for driving the moving blade holder 15 to move. By swinging, the moving blade holder 15 and the fixed blade holder 6 are opened and closed, thereby completing the cutting operation of the abrasive cloth.

[0033] An eccentric shaft 4 driven by an external motor is located in the middle of the lower part of the main board 1 of the machine head. The eccentric shaft 4 is a key component for power conversion of the entire equipment. Driven by the external motor, it rotates and converts the rotational motion into linear reciprocating motion through the cam fixedly installed on it, thereby driving the front connecting rod 2 and the rear connecting rod 7 to move.

[0034] Two opposing cams are fixedly mounted on the eccentric shaft 4. As the eccentric shaft 4 rotates, the cams' special profile shape allows them to periodically push the front connecting rod 2 and the rear connecting rod 7 during rotation, precisely controlling the swing amplitude and frequency of the front boom 31 and the rear boom 5, ensuring the stability and efficiency of the cutting action.

[0035] The front connecting rod 2 and the rear connecting rod 7 are respectively fitted on the two cams of the eccentric shaft 4. The front connecting rod 2 and the rear connecting rod 7 play the role of transmitting power, transmitting the motion of the cams of the eccentric shaft 4 to the front boom 31 and the rear boom 5, ensuring that the front boom 31 and the rear boom 5 can swing along the predetermined trajectory, so as to realize the precise cutting motion of the moving tool holder 15.

[0036] The front connecting rod 2 is rotatably connected to the lower end of the front boom 31, and the rear connecting rod 7 is rotatably connected to the rear boom 5. This connection method ensures smooth and flexible power transmission, enabling the front boom 31 and the rear boom 5 to swing stably according to the motion law of the eccentric shaft 4, thereby driving the moving tool holder 15 to complete the cutting action.

[0037] A movable blade holder 15 is installed at the lower end of the front boom 31, and a fixed blade holder 6 is installed in front of the movable blade holder 15. Engaging blades are mounted on both the movable blade holder 15 and the fixed blade holder 6 via screws. The blades on the movable blade holder 15 and the fixed blade holder 6 are the direct components for cutting the abrasive cloth. The movable blade holder 15 swings under the drive of the boom, cooperating with the fixed blade holder 6 to cut the abrasive cloth into the required size and shape through the engagement of the blades.

[0038] A tape holder 11 is positioned above the moving blade holder 15 and the fixed blade holder 6. A tape frame 32 is connected to the upper end of the tape holder 11. The tape frame 32 is fixedly mounted on the main board 1 of the machine head. The abrasive cloth enters the tape frame 32 from the external feeding mechanism and then passes through the tape holder 11. The tape frame 32 guides and positions the abrasive cloth, ensuring that it enters the tape holder 11 accurately. The tape holder 11, on the other hand, constrains and protects the abrasive cloth, ensuring that it remains stable during feeding, without shifting or wrinkling, thus providing favorable conditions for subsequent cutting operations.

[0039] The belt cassette 11 has a through hole running from front to back. A feeding wheel 24 and a driven wheel 13 are positioned at the front and rear of the through hole, respectively. The feeding wheel 24 is driven by an external motor to pull the abrasive cloth through the belt cassette 11. The feeding wheel 24 is the active component for feeding the abrasive cloth. Driven by the external motor, it rotates and uses friction with the abrasive cloth to pull it through the belt cassette 11 at a predetermined speed and direction, entering the cutting area. The driven wheel 13 provides auxiliary support and guidance, working in conjunction with the feeding wheel 24 to ensure the flatness and stability of the abrasive cloth during feeding, preventing skewing or jamming.

[0040] The feed roller 24 is fixedly mounted on the feed roller mounting shaft 23, which is mounted on the main board 1 of the machine head via bearings. The end of the feed roller mounting shaft 23 furthest from the feed roller 24 is fixedly connected to the output end of an external motor. The feed roller mounting shaft 23 provides a foundation for the support and rotation of the feed roller 24, ensuring that the feed roller 24 can rotate stably. The bearings reduce friction between the feed roller mounting shaft 23 and the main board 1 of the machine head, improving rotational efficiency and reducing energy loss. The connection between the feed roller mounting shaft 23 and the output end of the external motor enables the transmission of motor power to the feed roller 24, ensuring that the feed roller 24 can rotate at the set speed.

[0041] Driven wheel 13 is mounted on driven wheel mounting shaft 12 via bearings. The end of driven wheel mounting shaft 12 near the main board 1 of the machine head is fixedly mounted on swing arm 9. The upper end of swing arm 9 is rotatably connected to the main board 1 of the machine head. A driven wheel 13 clamping cylinder is fixedly mounted on the side of the main board 1 of the machine head corresponding to the swing arm 9 away from the feed wheel 24, which is used to push the swing arm 9 to swing. Driven wheel mounting shaft 12 supports driven wheel 13 and allows it to rotate freely. Swing arm 9 connects driven wheel mounting shaft 12 and main board 1 of the machine head, and swings under the action of driven wheel 13 clamping cylinder, thereby adjusting the distance between driven wheel 13 and feed wheel 24 and the clamping force on abrasive cloth, so as to adapt to the feeding requirements of abrasive cloth of different thicknesses and materials, and ensure that the abrasive cloth maintains good friction and stability during the feeding process.

[0042] The fixed blade holder 6 is mounted on a fixed blade holder 6 mounting base, which is mounted on the main board 1 of the machine head. The movable blade holder 15 is mounted on a movable blade holder 15 mounting base, which is mounted on the lower end of the front boom 31. The fixed blade holder 6 mounting base and the movable blade holder 15 mounting base are used to fix the fixed blade holder 6 and the movable blade holder 15 respectively, ensuring their positional accuracy during operation and enabling the blades on the movable blade holder 15 and the fixed blade holder 6 to accurately engage, achieving efficient cutting. At the same time, the connection between the movable blade holder 15 mounting base and the front boom 31 ensures that the movable blade holder 15 can move with the swing of the front boom 31 to complete the cutting action.

[0043] A front boom connecting shaft 33 is fixedly installed on the upper end of the front boom 31. A front boom bearing seat 20 is installed on the main board 1 of the machine head corresponding to the position of the front boom connecting shaft 33. The front boom connecting shaft 33 and the front boom bearing seat 20 are connected by bearings. A rear boom connecting shaft 22 is fixedly installed on the upper end of the rear boom 5. A rear boom bearing seat 21 is installed on the main board 1 of the machine head corresponding to the position of the rear boom connecting shaft 22. The rear boom connecting shaft 22 and the rear boom bearing seat 21 are connected by bearings. The front boom connecting shaft 33 and the rear boom connecting shaft 22 serve as the connecting components between the front boom 31 and the rear boom 5 and the main board 1 of the machine head, ensuring that the booms can rotate flexibly around the connecting shafts. The front boom bearing seat 20 and the rear boom bearing seat 21 provide support for the boom connecting shafts. The use of bearings reduces rotational friction, making the swing of the front boom 31 and the rear boom 5 more stable, and improving the operating accuracy and stability of the equipment.

[0044] The main board 1 of the machine head is equipped with a housing 17 to cover the eccentric shaft 4, the front connecting rod 2, and the rear connecting rod 7. An eccentric shaft bearing seat 3 is fixedly installed on the housing 17 corresponding to the position of the eccentric shaft 4, and the eccentric shaft 4 is connected to the eccentric shaft bearing seat 3 via bearings. The housing 17 serves a protective function, preventing the eccentric shaft 4, the front connecting rod 2, and the rear connecting rod 7 from external impacts and damage, and also preventing oil and debris from splashing during operation, ensuring a clean working environment. The eccentric shaft bearing seat 3 provides support for the eccentric shaft 4, ensuring its stability during rotation. The bearings allow the eccentric shaft 4 to rotate smoothly, reducing wear and extending its service life.

[0045] A base plate 8 is fixedly installed at the lower end of the main board 1 of the cutting head, which facilitates the installation and fixation of the cutting head. The base plate 8 provides a stable mounting foundation for the entire cutting head, enabling it to be firmly installed on the production equipment, ensuring that the equipment will not shake or shift during operation, and ensuring the smooth progress of the cutting work.

[0046] Both the feed roller 24 and the driven roller 13 are rubber rollers, which increases the friction between the abrasive cloth and the feed roller 24 and the driven roller 13. The material properties of the rubber rollers give them greater friction with the abrasive cloth. This allows the feed roller 24 to pull the abrasive cloth more effectively during feeding, and the driven roller 13 to better assist the feed roller 24, preventing the abrasive cloth from slipping and ensuring the accuracy and stability of feeding, thereby improving the precision and efficiency of cutting.

[0047] Working Principle: During use, check that all parts of the equipment are securely connected, ensuring that the blades on the moving blade holder 15 and the fixed blade holder 6 are properly engaged without loosening or wear. Install the abrasive cloth roll onto the external feeding mechanism, passing one end of the abrasive cloth through the belt frame 32 and the belt box 11, and placing it between the feed roller 24 and the driven roller 13. Check that the bearings on the feed roller mounting shaft 23 and the driven roller mounting shaft 12 are well lubricated to ensure smooth rotation, and simultaneously confirm that the driven roller 13 clamping cylinder is in its initial state.

[0048] When the external motor power is connected, the motor driving the eccentric shaft 4 is started, and the eccentric shaft 4 begins to rotate. At the same time, the external motor driving the feed wheel 24 is started, and the feed wheel mounting shaft 23 begins to rotate under the motor drive, thereby driving the feed wheel 24 to rotate.

[0049] The driven wheel 13 is activated by the cylinder, pushing the swing arm 9 to swing, causing the driven wheel 13 to press the abrasive cloth firmly against the abrasive cloth. This ensures the abrasive cloth remains stable during feeding, preventing slippage or deviation and guaranteeing feeding accuracy. The friction between the feeding wheel 24 and the abrasive cloth pulls the abrasive cloth downwards through the through-hole on the belt box 11. During this process, the driven wheel 13 rotates synchronously under the influence of the abrasive cloth, providing support and guidance.

[0050] During the rotation of the eccentric shaft 4, the two cams on it drive the front connecting rod 2 and the rear connecting rod 7 to move, respectively. The front connecting rod 2 drives the moving tool holder 15 at the lower end of the front boom 31 to reciprocate, while the rear connecting rod 7 drives the rear boom 5 to move synchronously, enhancing the load balance of the eccentric shaft 4 rotation. The blades on the moving tool holder 15 and the fixed tool holder 6 mesh with each other. When the moving tool holder 15 swings close to the fixed tool holder 6, it cuts the abrasive cloth passing between them to the required size.

[0051] During equipment operation, operators must constantly observe the feeding of the abrasive cloth and the cutting effect. Check whether the abrasive cloth is fed at a uniform speed, and whether there are any jams or wrinkles; inspect whether the edges of the cut abrasive cloth are neat and whether the dimensions meet the requirements. If any abnormalities are found, the machine should be stopped immediately for adjustment.

[0052] After completing the slicing task, first turn off the external motor that drives the feed roller 24 to stop feeding. Then turn off the motor that drives the eccentric shaft 4 to stop the moving blade holder 15 from swinging. Remove the cut abrasive cloth from the equipment and clean the abrasive cloth debris and other impurities remaining on the belt box 11, feed roller 24, and driven roller 13 to prepare for the next slicing operation.

[0053] In the head of this abrasive cloth slicer, the eccentric shaft bearing housing 3, eccentric shaft 4, fixed blade holder 6, fixed blade holder 6 mounting base, moving blade holder 15, moving blade holder 15 mounting base, front boom bearing housing 20, rear boom bearing housing 21, driven wheel 13, and clamping cylinder are all existing technologies and are not described in detail in this article. These components are all general standard parts or parts well known to those skilled in the art, and their structure and principles can be obtained through technical manuals or conventional experimental methods.

[0054] 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 only illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A head of a coated abrasive slicing machine, comprising a head main plate (1), characterized in that: The upper portion of the head main plate (1) is rotatably connected with a front lifting arm (31) and a rear lifting arm (5), the lower portion of the head main plate (1) is provided with an eccentric shaft (4) driven by an external motor, the eccentric shaft (4) is fixedly provided with two opposite cams, the eccentric shaft (4) is provided with a front connecting rod (2) and a rear connecting rod (7), the front connecting rod (2) is rotatably connected with the lower end of the front lifting arm (31), the rear connecting rod (7) is rotatably connected with the rear lifting arm (5), the lower end of the front lifting arm (31) is provided with a movable knife holder (15), the front side of the movable knife holder (15) is provided with a fixed knife holder (6), the movable knife holder (15) and the fixed knife holder (6) are provided with knife blades.

2. A head for a coated abrasive slicing machine according to claim 1, wherein: The upper portion of the head main plate (1) is rotatably connected with a front lifting arm (31) and a rear lifting arm (5), the lower portion of the head main plate (1) is provided with an eccentric shaft (4) driven by an external motor, the eccentric shaft (4) is fixedly provided with two opposite cams, the eccentric shaft (4) is provided with a front connecting rod (2) and a rear connecting rod (7), the front connecting rod (2) is rotatably connected with the lower end of the front lifting arm (31), the rear connecting rod (7) is rotatably connected with the rear lifting arm (5), the lower end of the front lifting arm (31) is provided with a movable knife holder (15), the front side of the movable knife holder (15) is provided with a fixed knife holder (6), the movable knife holder (15) and the fixed knife holder (6) are provided with knife blades.

3. A head for a coated abrasive slicing machine as defined in claim 2, wherein: The upper portion of the head main plate (1) is rotatably connected with a front lifting arm (31) and a rear lifting arm (5), the lower portion of the head main plate (1) is provided with an eccentric shaft (4) driven by an external motor, the eccentric shaft (4) is fixedly provided with two opposite cams, the eccentric shaft (4) is provided with a front connecting rod (2) and a rear connecting rod (7), the front connecting rod (2) is rotatably connected with the lower end of the front lifting arm (31), the rear connecting rod (7) is rotatably connected with the rear lifting arm (5), the lower end of the front lifting arm (31) is provided with a movable knife holder (15), the front side of the movable knife holder (15) is provided with a fixed knife holder (6), the movable knife holder (15) and the fixed knife holder (6) are provided with knife blades.

4. A head for a coated abrasive slicing machine according to claim 3, wherein: The upper portion of the head main plate (1) is rotatably connected with a front lifting arm (31) and a rear lifting arm (5), the lower portion of the head main plate (1) is provided with an eccentric shaft (4) driven by an external motor, the eccentric shaft (4) is fixedly provided with two opposite cams, the eccentric shaft (4) is provided with a front connecting rod (2) and a rear connecting rod (7), the front connecting rod (2) is rotatably connected with the lower end of the front lifting arm (31), the rear connecting rod (7) is rotatably connected with the rear lifting arm (5), the lower end of the front lifting arm (31) is provided with a movable knife holder (15), the front side of the movable knife holder (15) is provided with a fixed knife holder (6), the movable knife holder (15) and the fixed knife holder (6) are provided with knife blades.

5. The abrasive cloth slicing machine head of claim 1, wherein: The upper portion of the head main plate (1) is rotatably connected with a front lifting arm (31) and a rear lifting arm (5), the lower portion of the head main plate (1) is provided with an eccentric shaft (4) driven by an external motor, the eccentric shaft (4) is fixedly provided with two opposite cams, the eccentric shaft (4) is provided with a front connecting rod (2) and a rear connecting rod (7), the front connecting rod (2) is rotatably connected with the lower end of the front lifting arm (31), the rear connecting rod (7) is rotatably connected with the rear lifting arm (5), the lower end of the front lifting arm (31) is provided with a movable knife holder (15), the front side of the movable knife holder (15) is provided with a fixed knife holder (6), the movable knife holder (15) and the fixed knife holder (6) are provided with knife blades.

6. A head for a coated abrasive slicing machine according to claim 1 wherein: ​ 7. A head for a coated abrasive slicing machine according to claim 1 wherein: The box (17) is installed on the head main plate (1) to cover the eccentric shaft (4), the front connecting rod (2) and the rear connecting rod (7); the eccentric shaft bearing seat (3) is fixedly installed at the position corresponding to the eccentric shaft (4) of the box (17), and the eccentric shaft (4) is connected with the eccentric shaft bearing seat (3) through a bearing.

8. The abrasive cloth slicing machine head of claim 1, wherein: The bottom plate (8) is fixedly installed at the lower end of the head main plate (1).

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