Cutting device

Abstract

The utility model provides a cutting device which comprises a machining table, a first sliding groove is formed in the machining table, and the machining table is used for placing a piece to be cut; the cutter assembly comprises a cutter holder and a cutting knife mounted on the cutter holder, the cutter assembly is movably arranged in the extending direction of the first sliding groove, at least part of the cutting knife is located on one side of the first sliding groove and is opposite to the first sliding groove, and the position of the cutting knife is adjustably arranged; the cutting position is used for making contact with a to-be-cut piece, and the avoiding position is used for avoiding the to-be-cut piece; and the first driving assembly is in driving connection with the cutter assembly so as to drive the cutter assembly to move along the first sliding groove, so that the cutter assembly can cut the to-be-cut piece in the extending direction of the first sliding groove, and the problem that in the prior art, a cutting device cuts the precursor through high-speed rotation of a blade, and the cutting efficiency is high is solved. And long-time machining can cause abrasion of the blade, so that the machining cost is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of glass fiber cutting equipment, in particular to a cutting device. Background Art

[0002] Glass fiber is an inorganic non-metallic material. It is widely used in many fields because of its good insulation, strong heat resistance, good corrosion resistance and high mechanical strength. During the processing of glass fiber, the raw fibers need to be cut before the next step can be carried out.

[0003] The cutting devices in the prior art all cut the raw wire by rotating the blade at high speed. Long-term processing will cause the blade to wear and tear, and it needs to be replaced regularly, which increases the processing cost, thereby making the method of cutting glass fiber more expensive. Utility Model Content

[0004] The main purpose of the utility model is to provide a cutting device to solve the problem of high cost in the prior art for cutting glass fibers.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a cutting device is provided, including: a processing table, a first slide groove is arranged on the processing table, and the processing table is used to place the workpiece to be cut; a tool assembly, including a tool holder and a cutting knife installed on the tool holder, the tool assembly is movably arranged along the extension direction of the first slide groove, at least part of the cutting knife is located on one side of the first slide groove and is arranged opposite to the first slide groove, and the position of the cutting knife is adjustably arranged to have a cutting position for contacting the workpiece to be cut and an avoidance position for avoiding the workpiece to be cut; a first drive assembly, the first drive assembly is drivingly connected to the tool assembly to drive the tool assembly to move along the first slide groove, so as to realize the tool assembly cutting the workpiece to be cut along the extension direction of the first slide groove.

[0006] Furthermore, the tool assembly also includes: a cutting seat, the tool seat is rotatably mounted on the cutting seat, and the first driving assembly is drivingly connected to the cutting seat to drive the cutting seat to move along the extension direction of the first sliding groove.

[0007] Furthermore, the first driving component also includes: a driving motor, which is installed on the processing table; a transmission screw, which extends along the first slide groove, and a threaded hole threadedly connected to the transmission screw is provided on the cutting seat, and the output shaft of the driving motor is connected to the transmission screw to drive the cutting seat to move along the extension direction of the first slide groove by driving the transmission screw to rotate.

[0008] Furthermore, the cutting device also includes: a second driving component, which is drivingly connected to the knife holder to drive the cutting knife to move to the cutting position or the avoidance position by driving the knife holder to move.

[0009] Furthermore, the second driving assembly includes a first telescopic rod, one end of which is hinged to the knife holder to drive the knife holder to move and move along the first sliding groove driven by the knife holder.

[0010] Furthermore, a second slide groove is arranged on the processing table, and the cutting device further comprises: a moving frame, the moving frame is slidably installed in the second slide groove along the extension direction of the second slide groove, and the first telescopic rod is installed on the moving frame.

[0011] Furthermore, the movable frame includes a first plate body and a second plate body which are arranged opposite to each other, and a third plate body which is located between the first plate body and the second plate body, there are two second slide grooves, the two second slide grooves are respectively located on the opposite sides of the first slide groove, the third plate body is located on one side of the processing table, the side of the first plate body away from the third plate body can be slidably installed in a second slide groove, and the side of the second plate body away from the third plate body can be slidably installed in another second slide groove; wherein, the first telescopic rod is installed on the third plate body.

[0012] Furthermore, the knife seat is a triangular structure, the cutting knife is arranged on a surface of the triangular structure, the first telescopic rod is hinged to an edge of the triangular structure, and the edge is located at one end of the surface of the triangular structure for installing the cutting knife.

[0013] Furthermore, the cutting device further comprises: a clamping assembly, at least a portion of which is adjustably arranged relative to the processing table to clamp the workpiece to be cut on the processing table or release the workpiece to be cut on the processing table.

[0014] Furthermore, the clamping assembly includes: a support frame, which is adjustably mounted on the processing table; a clamping plate, which is mounted on the support frame to clamp or release the workpiece to be cut under the drive of the support frame; and a third drive assembly, which is drive-connected to the support frame to drive the support frame to move.

[0015] Furthermore, the support frame includes two linkage rods and a support rod located between the two linkage rods, and the clamping plate is installed on the support rod; the third driving assembly includes two second telescopic rods, and the two second telescopic rods are respectively driven and connected to the two linkage rods to drive each linkage rod to move synchronously; and / or the clamping assembly also includes a buffer pad, which is installed on the clamping plate so that the clamping plate contacts the workpiece to be cut through the buffer pad.

[0016] Applying the technical solution of the utility model, the cutting device of the utility model includes: a processing table, a first slide groove is arranged on the processing table, and the processing table is used to place the workpiece to be cut; a tool assembly, including a tool holder and a cutting knife installed on the tool holder, the tool assembly is movably arranged along the extension direction of the first slide groove, at least part of the cutting knife is located on one side of the first slide groove and is arranged opposite to the first slide groove, and the position of the cutting knife is adjustably arranged to have a cutting position for contacting the workpiece to be cut and an avoidance position for avoiding the workpiece to be cut; a first driving assembly, the first driving assembly is drivingly connected to the tool assembly to drive the tool assembly to move along the first slide groove, so as to realize the tool assembly cutting the workpiece to be cut along the extension direction of the first slide groove. In this way, the cutting device of the utility model realizes the cutting of glass fiber raw yarn by setting a compact processing table, a first slide groove, a tool assembly and a first drive assembly. This sliding cutting method can effectively reduce the wear of the cutting knife, improve the efficiency of the cutting device, and do not need to frequently replace the cutting knife, thereby reducing the use cost of the cutting knife. It effectively solves the problem of the prior art that the raw yarn is cut by high-speed rotation of the blade, and long-term processing will cause wear of the blade, thereby increasing the processing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of the overall structure of the cutting device according to an embodiment of the utility model in one direction is shown;

[0019] Figure 2 Shows Figure 1 A side view of the cutting device shown without the processing table installed;

[0020] Figure 3 Shows Figure 1 The cutting device is shown in a front view without the processing table installed.

[0021] The above drawings include the following reference numerals:

[0022] 1. Processing table; 2. First slide; 3. Part to be cut; 4. Tool assembly; 5. Tool holder; 6. Cutting knife; 7. First drive assembly; 8. Cutting seat; 9. Drive motor; 10. Transmission screw; 11. Second drive assembly; 12. First telescopic rod; 13. Second slide; 14. Moving frame; 141. First plate; 142. Second plate; 143. Third plate; 15. Clamping assembly; 16. Support frame; 17. Clamping plate; 18. Third drive assembly; 19. Linkage rod; 20. Support rod; 21. Second telescopic rod; 22. Buffer pad. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] like Figures 1 to 3 As shown, the utility model provides a cutting device, including: a processing table 1, a first slide groove 2 is arranged on the processing table 1, and the processing table 1 is used to place a piece to be cut 3; a tool assembly 4, including a knife seat 5 and a cutting knife 6 installed on the knife seat 5, the tool assembly 4 is movably arranged along the extension direction of the first slide groove 2, at least part of the cutting knife 6 is located on one side of the first slide groove 2 and is arranged opposite to the first slide groove 2, and the position of the cutting knife 6 is adjustable to have a cutting position for contacting the piece to be cut 3 and an avoidance position for avoiding the piece to be cut 3; a first driving assembly 7, the first driving assembly 7 is drivingly connected to the tool assembly 4 to drive the tool assembly 4 to move along the first slide groove 2, so as to realize the tool assembly 4 to cut the piece to be cut 3 along the extension direction of the first slide groove 2. Specifically, the piece to be cut 3 in this embodiment is glass fiber raw yarn.

[0025] In this way, the cutting device of the utility model realizes the cutting of glass fiber raw yarn by setting a compact processing table 1, a first slide groove 2, a tool assembly 4 and a first drive assembly 7. This sliding cutting method can effectively reduce the wear of the cutting knife 6, improve the efficiency of the cutting device, and do not need to frequently replace the cutting knife 6, thereby reducing the use cost of the cutting knife 6. It effectively solves the problem that the prior art cuts the raw yarn by high-speed rotation of the blade, and long-term processing will cause wear of the blade, thereby increasing the processing cost.

[0026] Specifically, the cutting knife 6 is detachably connected to the knife holder 5. When the cutting knife 6 is worn and cannot be used, the worn cutting knife 6 only needs to be removed and replaced with a new cutting knife 6, which greatly improves the working efficiency and saves the working time of the cutting device.

[0027] like Figure 1 and Figure 3As shown, the tool assembly 4 also includes: a cutting seat 8, the tool seat 5 is rotatably mounted on the cutting seat 8, and the first driving assembly 7 is drivingly connected to the cutting seat 8 to drive the cutting seat 8 to move along the extension direction of the first sliding groove 2.

[0028] Optionally, the knife seat 5 and the cutting seat 8 are connected by a pin.

[0029] Regarding the specific structure of the first drive component 7, in one embodiment, the first drive component 7 also includes: a drive motor 9, which is installed on the processing table 1; a transmission screw 10, which extends along the first slide groove 2, and a threaded hole threadedly connected to the transmission screw 10 is provided on the cutting seat 8. The output shaft of the drive motor 9 is connected to the transmission screw 10, so as to drive the cutting seat 8 to move along the extension direction of the first slide groove 2 by driving the transmission screw 10 to rotate.

[0030] In another embodiment, the driving assembly further includes one or more of a telescopic rod and a cylinder.

[0031] like Figures 1 to 3 As shown, the cutting device further includes: a second driving assembly 11, which is drivingly connected to the knife holder 5, so as to drive the cutting knife 6 to move to the cutting position or the avoidance position by driving the knife holder 5 to move.

[0032] Specifically, the second driving assembly 11 includes a first telescopic rod 12 , one end of which is hinged to the knife holder 5 to drive the knife holder 5 to move and move along the first sliding groove 2 driven by the knife holder 5 .

[0033] Optionally, the first telescopic rod 12 and the knife seat 5 are connected by a pin.

[0034] like Figure 1 As shown, a second slide groove 13 is provided on the processing table 1 , and the cutting device further includes: a moving frame 14 , which is slidably installed in the second slide groove 13 along the extension direction of the second slide groove 13 , and the first telescopic rod 12 is installed on the moving frame 14 .

[0035] Specifically, when cutting the glass fiber raw yarn, first, the first telescopic rod 12 in the second driving assembly 11 drives the knife seat 5 to descend in the direction of the piece to be cut 3. Since the knife seat 5 and the cutting seat 8 are hinged, the cutting knife 6 descends to a corresponding height to perform preliminary cutting on the glass fiber raw yarn. Secondly, the driving motor 9 in the first driving assembly 7 is started. Since the output end of the driving motor 9 is connected to the driving screw 10, the driving screw 10 extends along the first slide 2, and a threaded hole threadedly connected to the driving screw 10 is provided on the cutting seat 8. Therefore, under the action of the driving motor 9, the cutting seat 8 drives the knife seat 5 and the cutting knife 6 to move in the first slide 2 to cut the glass fiber raw yarn.

[0036] Specifically, after the cutting of the glass fiber raw yarn is completed, the driving motor 9 is reversed to drive the cutting seat 8 to slide in the opposite direction along the first slide groove 2 to return to the original cutting position, and new glass fiber material is placed on the processing table 1 to achieve cutting again.

[0037] like Figure 1 and Figure 2 As shown, the movable frame 14 includes a first plate body 141 and a second plate body 142 which are arranged opposite to each other, and a third plate body 143 which is located between the first plate body 141 and the second plate body 142. There are two second slide grooves 13, and the two second slide grooves 13 are respectively located on the opposite sides of the first slide groove 2. The third plate body 143 is located on one side of the processing table 1. The side of the first plate body 141 away from the third plate body 143 can be slidably installed in one second slide groove 13, and the side of the second plate body 142 away from the third plate body 143 can be slidably installed in another second slide groove 13; wherein, the first telescopic rod 12 is installed on the third plate body 143.

[0038] Specifically, the first telescopic rod 12 is installed on the moving frame 14, the first telescopic rod 12 and the knife holder 5 are hinged, and the moving frame 14 is slidably installed in the second sliding groove 13 along the extension direction of the second sliding groove 13 to drive the cutting seat 8 and the knife holder 5 to move synchronously.

[0039] like Figure 3 As shown, the knife seat 5 is a triangular structure, the cutting knife 6 is arranged on a surface of the triangular structure, and the first telescopic rod 12 is hinged to an edge of the triangular structure, and the edge is located at one end of the surface of the triangular structure for installing the cutting knife 6.

[0040] Optionally, the knife seat 5 is a right triangle, and the cutting knife 6 is arranged on the inclined plane of the right triangle of the knife seat 5, so when the first telescopic rod 12 drives one end of the knife seat 5 to descend, sufficient pressure can be exerted on the glass fiber raw yarn, thereby achieving effective cutting of the glass fiber raw yarn.

[0041] like Figure 1 to Figure 2 As shown, the cutting device further includes: a clamping assembly 15 , at least a portion of which is adjustably arranged relative to the processing table 1 to clamp the workpiece to be cut on the processing table 1 or release the workpiece 3 to be cut on the processing table 1 .

[0042] Specifically, the clamping assembly 15 includes: a support frame 16, which is positionally adjustable and mounted on the processing table 1; a clamping plate 17, which is mounted on the support frame 16 to clamp or release the workpiece 3 to be cut under the drive of the support frame 16; and a third driving assembly 18, which is drivingly connected to the support frame 16 to drive the support frame 16 to move.

[0043] like Figure 1 and Figure 2 As shown, the support frame 16 includes two linkage rods 19 and a support rod 20 located between the two linkage rods 19, and the clamping plate 17 is installed on the support rod 20; the third driving assembly 18 includes two second telescopic rods 21, and the two second telescopic rods 21 are respectively driven and connected to the two linkage rods 19 to drive each linkage rod 19 to move synchronously; and / or the clamping assembly 15 also includes a buffer pad 22, and the buffer pad 22 is installed on the clamping plate 17 so that the clamping plate 17 contacts the piece 3 to be cut through the buffer pad 22.

[0044] Specifically, when the glass fiber material is being cut, the second telescopic rod 21 in the third drive assembly 18 can drive the two linkage rods 19 in the support frame 16 to move along the direction of the piece to be cut 3, so as to drive the clamping plate 17 in the support rod 20 to press and position the piece to be cut 3, so as to prevent the glass fiber raw yarn from shaking when being cut, thereby affecting the processing accuracy and quality.

[0045] Specifically, a plurality of movable grooves are provided at the four ends of the processing table 1 to place the support frame 16 .

[0046] Specifically, the pressing plate 17 and the linkage rod 19 are arranged at a predetermined angle, and the predetermined angle is an obtuse angle.

[0047] Specifically, a support leg is fixedly connected to the bottom of the processing table 1 near the end.

[0048] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0049] The utility model provides a cutting device, comprising: a processing table 1, a first slide groove 2 is arranged on the processing table 1, and the processing table 1 is used to place a piece to be cut 3; a tool assembly 4, comprising a tool holder 5 and a cutting knife 6 installed on the tool holder 5, the tool assembly 4 is movably arranged along the extension direction of the first slide groove 2, at least part of the cutting knife 6 is located on one side of the first slide groove 2 and is arranged opposite to the first slide groove 2, and the position of the cutting knife 6 is adjustably arranged to have a cutting position for contacting the piece to be cut 3 and an avoidance position for avoiding the piece to be cut 3; a first driving assembly 7, the first driving assembly 7 is drivingly connected to the tool assembly 4 to drive the tool assembly 4 to move along the first slide groove 2, so as to realize the tool assembly 4 cutting the piece to be cut 3 along the extension direction of the first slide groove 2. In this way, the cutting device of the utility model realizes the cutting of glass fiber raw yarn by setting a compact processing table 1, a first slide groove 2, a tool assembly 4 and a first drive assembly 7. This sliding cutting method can effectively reduce the wear of the cutting knife 6, improve the efficiency of the cutting device, and do not need to frequently replace the cutting knife 6, thereby reducing the use cost of the cutting knife 6. It effectively solves the problem that the prior art cuts the raw yarn by high-speed rotation of the blade, and long-term processing will cause wear of the blade, thereby increasing the processing cost.

[0050] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0051] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0052] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0053] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0054] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0055] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A cutting device, characterized in that: include: A processing table (1), wherein a first slide groove (2) is provided on the processing table (1), and the processing table (1) is used to place a piece to be cut (3); A tool assembly (4), comprising a tool holder (5) and a cutting knife (6) mounted on the tool holder (5), the tool assembly (4) being movably arranged along the extension direction of the first slide groove (2), at least a portion of the cutting knife (6) being located on one side of the first slide groove (2) and being arranged opposite to the first slide groove (2), the position of the cutting knife (6) being adjustable so as to have a cutting position for contacting the workpiece (3) to be cut and an avoidance position for avoiding the workpiece (3) to be cut; A first driving assembly (7), wherein the first driving assembly (7) is drivingly connected to the tool assembly (4) to drive the tool assembly (4) to move along the first slide groove (2), so as to enable the tool assembly (4) to cut the workpiece (3) to be cut along the extension direction of the first slide groove (2).

2. The cutting device according to claim 1, characterized in that The tool assembly (4) further comprises: A cutting seat (8), the knife seat (5) is rotatably mounted on the cutting seat (8), and the first driving assembly (7) is drivingly connected to the cutting seat (8) to drive the cutting seat (8) to move along the extension direction of the first sliding groove (2).

3. The cutting device according to claim 2, characterized in that: The first driving assembly (7) further comprises: A driving motor (9), wherein the driving motor (9) is mounted on the processing table (1); A transmission screw (10), the transmission screw (10) extending along the first slide groove (2), the cutting seat (8) being provided with a threaded hole threadedly connected to the transmission screw (10), the output shaft of the driving motor (9) being connected to the transmission screw (10), so as to drive the cutting seat (8) to move along the extension direction of the first slide groove (2) by driving the transmission screw (10) to rotate.

4. The cutting device according to claim 1, characterized in that: The cutting device also includes: A second driving component (11), the second driving component (11) is drivingly connected to the knife holder (5) so as to drive the cutting knife (6) to move to the cutting position or the avoidance position by driving the knife holder (5) to move.

5. The cutting device according to claim 4, characterized in that The second driving assembly (11) comprises a first telescopic rod (12), one end of which is hinged to the knife seat (5) to drive the knife seat (5) to move and move along the first sliding groove (2) driven by the knife seat (5).

6. The cutting device according to claim 5, characterized in that The processing table (1) is provided with a second slide groove (13), and the cutting device further comprises: A moving frame (14) is slidably mounted in the second sliding groove (13) along an extension direction of the second sliding groove (13), and the first telescopic rod (12) is mounted on the moving frame (14).

7. The cutting device according to claim 6, characterized in that The movable frame (14) comprises a first plate (141), a second plate (142) and a third plate (143) located between the first plate (141) and the second plate (142), the second slide grooves (13) being two, the two second slide grooves (13) being respectively located on opposite sides of the first slide groove (2), the third plate (143) being located on one side of the processing table (1), the side of the first plate (141) away from the third plate (143) being slidably mounted in one of the second slide grooves (13), and the side of the second plate (142) away from the third plate (143) being slidably mounted in another of the second slide grooves (13); wherein the first telescopic rod (12) is mounted on the third plate (143).

8. The cutting device according to claim 5, characterized in that The knife seat (5) is a triangular structure, the cutting knife (6) is arranged on a surface of the triangular structure, the first telescopic rod (12) is hinged to an edge of the triangular structure, and the edge is located at one end of the surface of the triangular structure for mounting the cutting knife (6).

9. The cutting device according to any one of claims 1 to 8, characterized in that The cutting device also includes: A clamping assembly (15), at least a portion of which is adjustably arranged relative to the processing table (1) to clamp a workpiece to be cut located on the processing table (1) or release a workpiece to be cut (3) located on the processing table (1).

10. The cutting device according to claim 9, characterized in that The pressing assembly (15) comprises: A support frame (16), wherein the support frame (16) is mounted on the processing table (1) in an adjustable manner; A pressing plate (17), wherein the pressing plate (17) is mounted on the support frame (16) so as to press or release the piece to be cut (3) under the drive of the support frame (16); A third driving assembly (18), wherein the third driving assembly (18) is drivingly connected to the support frame (16) to drive the support frame (16) to move.

11. The cutting device according to claim 10, characterized in that The support frame (16) comprises two linkage rods (19) and a support rod (20) located between the two linkage rods (19), and the clamping plate (17) is mounted on the support rod (20); the third driving assembly (18) comprises two second telescopic rods (21), and the two second telescopic rods (21) are respectively drivingly connected to the two linkage rods (19) to drive each of the linkage rods (19) to move synchronously; and / or The pressing assembly (15) further comprises a buffer pad (22), wherein the buffer pad (22) is mounted on the pressing plate (17) so that the pressing plate (17) contacts the workpiece (3) to be cut through the buffer pad (22).

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