Cutting machine head and cutting device

Abstract

The utility model provides a cutting machine head which is used for a cutting device and comprises a cutting assembly and a pressing assembly. The cutting assembly comprises a tool bit, a tool rest and a driving part, the driving part drives the tool rest to rotate and drives the tool bit to move up and down and vibrate, the material pressing assembly is provided with a through hole so that the tool bit can penetrate through the through hole to conduct cutting, the material pressing assembly comprises a material pressing frame and a material pressing disc, and the material pressing disc is installed on the material pressing frame in the mode that the material pressing disc can rotate relative to the material pressing frame; the material pressing frame and a rack of a cutting assembly of the cutting device are installed together and can move linearly along with the cutting assembly, and when the cutting assembly cuts the sheet materials, a material pressing disc makes contact with the sheet materials and exerts certain acting force so that the sheet materials can be smoother. When the cutting assembly moves relative to the sheet stock, the material pressing disc freely rotates or moves under the action of friction force between the material pressing disc and the sheet stock, and when the machine head of the cutting device moves at a high speed, the material pressing disc freely rotates, so that the overall resistance is reduced, the sheet stock is not prone to wrinkling during high-speed cutting, and the cutting speed can be further increased.

Description

Technical Field

[0001] The present application relates to the field of cutting technology, and in particular to a cutting head and a cutting device. Background Art

[0002] Existing cutting devices are generally used to cut softer sheets, such as leather, cloth, PVC mesh cloth, EVA foam, etc., especially when cutting thinner leather or cloth. Since the leather or cloth may be locally uneven, it will affect the cutting effect and efficiency. Therefore, a cutting head such as a pressure plate is generally set, but the existing pressure plate is usually fixed to the head of the cutting device, so that the friction between the pressure plate and the cut sheet is large. When cutting at high speed, the resistance caused by the unevenness of the sheet will further increase. When the resistance increases to a certain value, the movement of the pressure plate will cause the sheet to wrinkle locally or move. This not only affects the cutting accuracy, but may also cause the sheet to be scrapped, which not only affects the processing accuracy, but also increases the processing cost.

[0003] Chinese patent publication number "CN104608162A" and the patent name "A CNC coil material vibrating knife cutting device" discloses a cutting device whose pressure plate is directly fixed on the tool holder sleeve, so that the friction resistance is large when moving at high speed.

[0004] Chinese patent publication number "CN108866251A" and the patent name "A high-efficiency leather cutting device for sofa processing" discloses a cutting device that uses a pulley under the pressure block to reduce friction between the leather and the leather. However, such a design can easily cause scratches on the leather and cannot cope with rotation in different directions.

[0005] China's patent announcement number "CN109971896B" and the patent name "A vibrating knife leather cutting device with a leather-safe presser foot" discloses a cutting device that uses a friction-reducing roller to reduce friction with the leather. Although it can cope with different directions, its contact area is small, the effect of pressing the material is poor, and the structure is complex and the production cost is high.

[0006] Chinese patent publication number "CN111376323A" and the patent name "A high-speed cutting head and cutting device for soft materials" discloses a cutting device. Although a rotating cutter disc is provided, the rotating cutter disc assembly is used to drive the cutter to rotate. In this way, when the cutter does not rotate, the rotating cutter disc will inevitably not rotate. In other words, the friction force received by the cutter disc is basically the same as that of the patent scheme of "CN104608162A". There is also a large friction force when moving at high speed, which can easily squeeze the leather and cause wrinkles in the leather, affecting the cutting.

[0007] Chinese patent publication number "CN114872120B" and the patent name "A stable structure of a cutting machine with five-axis double-knife discs" discloses a cutting structure, in which the pressure plate box is installed on a limit reinforcement ring, that is, the pressure plate box is basically the same as the "CN104608162A" patent scheme, and there is also a large friction force, which is easy to squeeze the leather and cause wrinkles on the leather, affecting the cutting. Although it is installed with bearings, the role of the bearings is to ensure that the cutters in different directions play a limiting or guiding role. Even if the bearings are not on the pressure plate box, it can have the same technical effect. During cutting, the pressure plate box will never rotate, only the cutter inside rotates to achieve cutting in different directions. Utility Model Content

[0008] In response to the above-mentioned prior art, the purpose of this application is to propose a cutting head and a cutting device, which can not only reduce the friction between the cutting head and the pressed sheet when the cutting head moves, but also has a simple structure and will not produce indentations on the surface of the pressed material.

[0009] According to the first aspect of the present application, a cutting head is provided for a cutting device, including a cutting assembly and a pressing assembly; the cutting assembly includes a cutter head, a cutter holder and a driving part, the driving part drives the cutter holder to rotate and drives the cutter head to move up and down and vibrate, the pressing assembly is provided with a through hole so that the cutter head passes through the through hole for cutting, the pressing assembly includes a pressing frame and a pressing plate, the pressing plate is mounted to the pressing frame in a manner that it can rotate relative to the pressing frame, the pressing frame is mounted together with the frame of the cutting assembly of the cutting device and can move linearly with the cutting assembly, when the cutting assembly cuts the sheet, the pressing plate contacts the sheet and applies a certain force to make the sheet smoother, when the cutting assembly moves relative to the sheet, the pressing plate rotates or moves freely under the action of the friction between the sheet and the pressing plate.

[0010] Compared with the prior art, the cutting head of the present application has the following beneficial effects: when the cutting head of the cutting device moves at high speed, the pressure plate of the cutting head contacts the sheet and generates a certain friction force. The pressure plate can rotate and has a rotation center, but the friction forces on both sides of the rotation center are difficult to be balanced. Once the friction force on one side of the rotation center is greater than the friction force on the other side, the pressure plate will rotate, which can reduce the resistance generated by the side with greater friction, making the overall resistance smaller. In addition, the static friction force generated by the leather and the metal surface is greater than the dynamic friction force. When the pressure plate rotates, although the speed of some positions is relatively small relative to the sheet, if it is seen that there is no relative movement at this position, it will basically not generate resistance that affects the movement of the pressure plate. The friction force at other positions is also increased, so the resistance generated by the overall friction force will be reduced, just like the rolling friction force is less than the friction force of planar movement. The action of force is mutual, the force on the pressure plate is reduced, and the force on the sheet will also be reduced. In this way, the sheet is not easy to wrinkle during high-speed cutting, and the cutting speed can also be further improved.

[0011] In one embodiment, the pressing plate is mounted on the pressing frame via a bearing. The pressing plate is provided with a bottom surface and a side surface. The side surface is a conical surface and the bottom surface is an annular surface.

[0012] In one embodiment, the pressing frame is provided with a first rod and a second rod, the cutting assembly is provided with a first sliding hole and a second sliding hole, the first rod is installed in the first sliding hole so that the first rod can move up and down relative to the first sliding hole, and the second rod is installed in the second sliding hole so that the second rod can move up and down relative to the second sliding hole.

[0013] In one embodiment, the press frame and the cutting assembly are fixedly connected via a sliding track so that the press frame can move up and down relative to the cutting assembly within a certain range.

[0014] In one embodiment, a first spring and a second spring are provided between the press frame and the cutting assembly. The first spring generates an upward elastic force on the press frame, and the second spring generates a downward elastic force on the press frame, so that the press frame is affected by the elastic force of the first spring and the second spring when it moves up and down.

[0015] In one embodiment, a first adjusting member and a first positioning sleeve are provided between the press frame and the cutting assembly, the first end of the first adjusting member abuts against the first spring or the second spring, the first positioning sleeve abuts against the second end of the first spring and the second end of the second spring, and the first adjusting member adjusts the compression amount of the first spring and the second spring by adjusting the position relative to the first positioning sleeve to change the position of the press frame.

[0016] In one embodiment, the pressure plate is mounted to the pressure frame via a self-aligning ball bearing, the relative inclination range between the center line of the inner ring and the center line of the outer ring of the self-aligning ball bearing does not exceed 3°, and the bottom of the pressure plate is conical and the cone angle is less than 5°.

[0017] In one embodiment, the pressing plate has a bottom surface and a side surface, the side surface is a conical surface, and the bottom surface is a circular plane. A bearing mounting hole is provided in the center of the pressing plate, and the bearing mounting hole is eccentrically arranged. A first bevel surface is provided on the side toward which the bearing mounting hole is biased, and a second bevel surface is provided on the opposite side, so that upward inclined surfaces are formed on both sides of the bearing mounting hole.

[0018] According to a second aspect of the present application, a cutting device includes the cutting head mentioned above.

[0019] In one embodiment, the cutting machine head is provided with a first punch, and the first punch is provided with a first presser foot.

[0020] In one embodiment, the cutting machine head is provided with a mechanical vibration cutter head or a pneumatic vibration cutter head to achieve cutting by high-frequency vibration.

[0021] Compared with the prior art, the cutting device of the present application has the following beneficial effects: the cutting device uses the above-mentioned cutting head, which can reduce the movement resistance during the cutting process, reduce the wrinkling of the sheet material, make the cutting more stable, and increase the cutting efficiency.

[0022] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other objects, features and advantages of the exemplary embodiments of the present application will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present application are shown in an illustrative and non-limiting manner, in which:

[0024] In the drawings, the same or corresponding reference numerals denote the same or corresponding parts.

[0025] Figure 1 A three-dimensional schematic diagram of the material pressing assembly of the cutting head according to an embodiment of the present application is shown;

[0026] Figure 2 An exploded schematic diagram of the pressing assembly of the cutting head according to an embodiment of the present application is shown;

[0027] Figure 3 A three-dimensional schematic diagram of a cutting head according to an embodiment of the present application is shown;

[0028] Figure 4 A schematic side view of a cutting head according to an embodiment of the present application is shown;

[0029] Figure 5 Shown Figure 4 Schematic cross-sectional view in the AA direction;

[0030] Figure 6 Shown Figure 4 Schematic cross-sectional view in the middle BB direction;

[0031] Figure 7 A front view of a cutting head according to an embodiment of the present application is shown;

[0032] Figure 8 Shown Figure 7 Schematic cross-sectional view in the CC direction;

[0033] Figure 9 A three-dimensional schematic diagram of a cutting head according to an embodiment of the present application is shown;

[0034] Figure 10 A schematic cross-sectional view of a cutting head according to an embodiment of the present application is shown;

[0035] Figure 11 Shown Figure 10 A partial enlarged schematic diagram of point D in the middle;

[0036] Figure 12 A three-dimensional schematic diagram of a pressing plate of a cutting head according to an embodiment of the present application is shown;

[0037] Figure 13 A side view of the pressing plate of the cutting head in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0038] In order to make the purpose, features, and advantages of this application more obvious and easy to understand, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0039] Example 1:

[0040] like Figure 1 、 Figure 2 、 Figure 3 and Figure 13As shown, a cutting head is used for a cutting device, including a cutting component 2 and a pressing component 1; the cutting component 2 includes a cutter head 22, a tool holder 25 and a driving part 20, the driving part 20 drives the tool holder 25 to rotate and drives the cutter head 22 to move up and down and vibrate, the pressing component 1 is provided with a through hole so that the cutter head 22 passes through the through hole for cutting, the pressing component 1 includes a pressing frame 11 and a pressing plate 12, the pressing plate 12 is mounted to the pressing frame 11 in a manner that it can rotate relative to the pressing frame 11, the pressing frame 11 is installed together with the frame 21 of the cutting component 2 of the cutting device and can move linearly with the cutting component 2, when the cutting component 2 cuts the sheet 3, the pressing plate 12 contacts the sheet 3 and applies a certain force to make the sheet 3 smoother, when the cutting component 2 moves relative to the sheet 3, the pressing plate 12 rotates or moves freely under the action of the friction between the sheet 3. The drive unit 20 can be one or more structures, and the sheet material 3 can be leather, cloth, PVC mesh cloth, EVA foam, etc. However, leather is more difficult to cut than other materials. Therefore, the technical effect of the embodiment of the present application on cutting leather is more obvious. Because leather is relatively hard compared to other materials, a pressure plate 12 is required to limit the position of the leather during cutting. The existing technology has a large resistance without improvement, especially when cutting at high speeds. Accidents such as local obstruction and wrinkling are prone to occur, forcing the machine to stop and requiring manual intervention, resulting in low production efficiency. After the technical solution of the present application improves the pressure plate 12, the resistance can be greatly reduced, reducing accidents in production, avoiding large amounts of leather being scrapped after cutting errors, and reducing production costs. Even if the leather material is the same, the friction coefficient at different positions is different, and the friction coefficient in some areas varies greatly. In this way, the resistance to resistance varies greatly when using an ordinary pressure plate structure. The technical solution of the present application can balance this change, especially when the friction force on both sides of the rotation center of the pressure plate 12 is unbalanced. Rotation is used to reduce this friction resistance. Even if the friction force on both sides is not much different, rotation can also reduce the friction force on one side, so that the overall resistance is reduced. Of course, when the friction force on both sides is the same, rotation may not occur. However, this is actually an idealized state. Due to the influence of various factors such as the roughness and thickness of the material, it is difficult to achieve a balanced state. The actual processing process also verifies this point. Especially when using better bearings, the pressure plate 12 always keeps rotating or rotating back and forth during movement. The positive pressure between the pressure plate 12 and the sheet 3 is generally controlled at about 1N-10N, preferably 2N. When the positive pressure is controlled at 2N, the cutting of the moving pressure plate 12 is relatively stable.

[0041] like Figure 1 and Figure 2As shown, the pressing plate 12 is mounted to the pressing frame 11 via a bearing 126. The pressing plate 12 is provided with a bottom surface 121 and a side surface 122. The side surface 122 is a conical surface. For a small pressing plate, the cone angle of the conical surface is about 45 degrees. The bottom surface 121 is annular and can be a flat annular surface. The bottom surface 121 and the conical surface are transitioned by a rounded corner. The bottom surface 121 can be designed to be square or oval, as long as it can rotate relative to the pressing frame 11. However, the resistance is relatively large, but the pressing effect is not much different. Therefore, a disc-shaped structure is conventionally adopted.

[0042] like Figure 1 and Figure 2 As shown, the press frame 11 is provided with a first rod 111 and a second rod 112, and the cutting assembly 2 is provided with a first sliding hole 211 and a second sliding hole 212. The first rod 111 is installed in the first sliding hole 211 so that the first rod 111 can move up and down relative to the first sliding hole 211, and the second rod 112 is installed in the second sliding hole 212 so that the second rod 112 can move up and down relative to the second sliding hole 212. The press frame 11 is provided with a first hole 113 and a second hole 114. The first rod 111 is installed in the first hole 113, and the second rod 112 is installed in the second hole 114. The first hole 113 is provided with a first locking groove 115, and the second hole 114 is provided with a second locking groove 116. The width of the first locking groove 115 can be adjusted by a screw. When the groove width changes, the size of the first hole 113 is also changed. Reducing the width of the first locking groove 115 can achieve locking of the first rod 111. Similarly, reducing the width of the second locking groove 116 can achieve locking of the second rod 112.

[0043] like Figure 1 and Figure 2 As shown, a first spring 213 and a second spring 214 are provided between the press frame 11 and the cutting assembly 2. The first spring 213 generates an upward elastic force on the press frame 11, and the second spring 214 generates a downward elastic force on the press frame 11, so that the press frame 11 is affected by the elastic force of the first spring 213 and the second spring 214 when it moves up and down.

[0044] like Figure 1 、 Figure 2 and Figure 5As shown, a first adjusting member 215 and a first positioning sleeve 216 are provided between the press frame 11 and the cutting assembly 2. The first end of the first adjusting member 215 abuts against the first spring 213 or the second spring 214, and the first positioning sleeve 216 abuts against the second end of the first spring 213 and the second end of the second spring 214. The first adjusting member 215 adjusts the compression amount of the first spring 213 and the second spring 214 by adjusting the position relative to the first positioning sleeve 216 to change the position of the press frame 11. The first positioning sleeve 216 can be configured as an upper sleeve 217 and a lower sleeve 218, which are installed in the first slide hole 211 of the cutting assembly 2. This makes replacement easy and can be used with other sleeves of the same model. The pressure of the pressing plate 12 on the sheet material 3 is not the greater the better. On the contrary, the smaller the pressure, the lower the friction resistance. In this way, it is not easy to generate a large force with the sheet material 3 such as leather during high-speed cutting. Since the thickness of the sheet material 3 is not necessarily very uniform, some areas are thicker and some areas are thinner. When the pressing plate 12 moves to the thicker area, the friction resistance is relatively large. The use of upper and lower spring structures can reduce the amplitude of the resistance increase. The friction resistance is related to the size of the positive pressure. The double spring structure can keep the positive pressure in a smaller state and can ensure the limiting function of the sheet material 3, avoiding the sheet material 3 from warping, so that the sheet material 3 is close to the work surface.

[0045] Example 2:

[0046] like Figure 3 and Figure 4 As shown, the cutting device includes a cutting component 2 equipped with the pressing device 1 of Example 1, the driving part 20 includes a first driving mechanism 23 and a second driving structure 24, the cutting component 2 is also provided with a cutter head 22, a first driving mechanism 23, a second driving structure 24, a tool holder 25 and a frame 21, the cutter head 22 is mounted on the tool holder 25, the tool holder 25 is mounted to the frame 21, the first driving mechanism 23 drives the cutter head 22 to rotate, the second driving structure 24 provides the power for the cutter head 22 to vibrate and the driving force for the up and down movement, the cutter head 22 cuts the sheet 3 under high-frequency vibration conditions, and a good cutting effect can be obtained. In the embodiment, the second driving structure 24 adopts a pneumatic vibrating cutter head 22 to use a pneumatic structure to realize high-frequency vibration to drive the cutter head 22 for cutting. Of course, a motor can also be provided to realize mechanical vibration of the cutter head 22 through a transmission structure.

[0047] like Figure 5 As shown, the pressing device 1 realizes the limiting function through the first spring 213 and the second spring 214. The position of the pressing device 1 can be controlled by adjusting the compression amount of the first spring 213 and the second spring 214. The cutter head 22 is located at the center hole position of the pressing device 1, and the cutter head 22 rotates with the first driving structure to realize cutting in different directions.

[0048] like Figure 4 and Figure 6 As shown, the cutting assembly 2 is provided with a first punch 26, and the first punch 26 is provided with a first presser foot 27. The first presser foot 27 is driven by the first cylinder 28 to move up and down, and the first punch 26 is driven by the first rotating wheel 30 to rotate. The first presser foot 27 is provided with a first guide rod 271 and a second guide rod 272. The first guide rod 271 and the second guide rod 272 guide the first presser foot 27 to move up and down. The first guide rod 271 is provided with a buffer spring 273. The first cylinder 28 pushes the first presser foot 27 to move up and down through the buffer spring 273. The cutting assembly 2 is also provided with a second punch 29. The second punch 29 adopts the same design as the first punch 26. When processing thicker sheets 3 or harder sheets 3, the second punch 29 and the first punch 26 can adopt a rotation method to realize gradual punching while rotating and moving downward.

[0049] like Figure 7 and Figure 8 As shown, the driving part 20 is also provided with a first driving motor 219, and the first driving motor 219 is provided with a first screw 220. The first screw 220 matches the first slider 221 of the frame 21. The first screw 220 drives the first slider 221 to move up and down so that the frame 21 can move up and down synchronously. During the up and down movement of the frame 21, the cutter head 22 and the pressing device 1 move synchronously.

[0050] Example 3:

[0051] like Figure 9 As shown, the pressing frame 11 is provided with a first rod 111, a second rod 112 and a third rod 117, and the first rod 111, the second rod 112 and the third rod 117 are evenly distributed circumferentially outside the tool holder 25, and the cutting assembly 2 is provided with a first mounting sleeve 222, a second mounting sleeve 223 and a third mounting sleeve 224. The first rod 111 is installed in the first mounting sleeve 222 so that the first rod 111 can move up and down relative to the first mounting sleeve 222, the second rod 112 is installed in the second mounting sleeve 223 so that the second rod 112 can move up and down relative to the second mounting sleeve 223, and the third rod 117 is installed in the third mounting sleeve 224 so that the third rod 117 can move up and down relative to the third mounting sleeve 224. The first rod 111, the second rod 112 and the third rod 117 are all provided with a first spring 213 and a second spring 214 respectively located at the upper and lower ends of the sleeve. The lower ends of the first rod 111, the second rod 112 and the third rod 117 are fixed to the pressing frame 11 by nuts, and the upper end of the first rod 111 is provided with a first adjusting piece 215.

[0052] Example 4:

[0053] like Figure 10 and Figure 11As shown, the pressing plate 12 is installed on the pressing frame 11 through the self-aligning ball bearing 120, and the relative inclination range of the inner ring center line and the outer ring center line of the self-aligning ball bearing 120 does not exceed 3°. For the pressing plate 12 with a diameter of more than 80 mm, the inclination range of the pressing plate 12 should be controlled within the range of 1.5°, and preferably can be 1°. For the pressing plate 12 directly within 40 mm, a 3° inclination can be considered. The bottom of the pressing plate 12 is conical and the cone angle is less than 5°. In this way, the contact area of ​​the resistance position in the area with greater friction can be reduced like a roller.

[0054] like Figure 10 As shown, the press frame 11 is fixedly connected to the cutting assembly 2 via a sliding track so that the press frame 11 can move up and down within a certain range relative to the cutting assembly 2. A first spring 213 and a second spring 214 are provided between the press frame 11 and the cutting assembly 2. The first spring 213 generates an upward elastic force on the press frame 11, and the second spring 214 generates a downward elastic force on the press frame 11, so that the press frame 11 is subjected to the elastic forces of the first spring 213 and the second spring 214 when it moves up and down.

[0055] Example 5:

[0056] like Figure 12 and Figure 13 As shown, the pressing plate 12 is provided with a bottom surface 121 and a side surface 122, the side surface 122 is a conical surface, and the bottom surface 121 is a circular ring plane. A bearing mounting hole 123 is provided in the center of the pressing plate 12, and the bearing mounting hole 123 is eccentrically arranged. A first beveled surface 124 is provided on the side toward which the bearing mounting hole 123 is biased, and a second beveled surface 125 is provided on the opposite side, so that upward inclined surfaces are formed on both sides of the bearing mounting hole 123. The inclination angle of the first beveled surface 124 is less than 15°, and the inclination angle of the second beveled surface 125 is less than 3°. Preferably, the inclination angle of the first beveled surface 124 of the pressing plate 12 with a diameter of 80 mm is 5°, and the inclination angle of the second beveled surface 125 is 1°. In this way, the contact area with the sheet material 3 on the side of the second beveled surface 125 is larger, and friction The friction force is also relatively large. When the pressing plate 12 moves relative to the sheet material 3, in front of the natural rotation direction of the first bevel 124, the inclination angle of the first bevel 124 is greater than the inclination angle of the second bevel 125. This can reduce the effective area on the side of the pressing plate 12 in the feeding direction, and reduce the resistance in the front of the forward direction. The resistance on both sides can be resolved by rotating the angle of the pressing plate 12 to resolve the friction force on the side with greater resistance. Therefore, the resistance on both sides has little effect on the technical solution of this application. A second bevel 125 is also set on the rear side, so that the contact area on the rear side is also greatly reduced. In this way, the main resistance is concentrated on the left and right sides, which is also the advantageous position of action of this application, that is, the force on the side with greater resistance is resolved by rotation.

[0057] like Figure 12and Figure 13 As shown, leather and other sheet materials 3 have a certain elasticity, so the thickness of the pressing plate 12 is slightly smaller when it is pressed. When it is not pressed, it is in a fluffy state and slightly higher than the lowest position of the pressing plate 12. In this way, the pressing plate 12 will have a certain force on the front when it moves at high speed, which is equivalent to the resistance of a car climbing a hill. Although the distance is increased by rotating, the resistance is reduced. Just like when a car climbs a hill, it does not move in a straight line, but along an oblique line. Although the distance is increased, it is more labor-saving. For the freely rotating pressing plate 12, the rotation does not affect the straight movement of the pressing plate 12. Under the premise of reduced resistance, it can move faster. Of course, the present embodiment will only swing forward within a certain range when the friction force is relatively balanced. It will only rotate when the friction force difference between the two sides is large. Compared with the fixed pressing plate of the prior art, it has obvious advantages. The area of ​​the first beveled surface 124 is larger than that of the ordinary conical surface, which is not easy to produce the phenomenon of local wrinkling caused by concentrated force. It is also more stable during high-speed cutting.

[0058] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this application can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of this application can be achieved. This is not limited herein.

[0059] Furthermore, the terms "first" and "second" 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 being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0060] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A cutting head for a cutting device, comprising a cutting assembly (2) and a pressing assembly (1); The cutting assembly (2) comprises a cutter head (22), a cutter holder (25) and a driving unit (20), wherein the driving unit (20) drives the cutter holder (25) to rotate and drives the cutter head (22) to move up and down and vibrate, and the pressing assembly (1) is provided with a through hole so that the cutter head (22) passes through the through hole for cutting, and is characterized in that: The pressing assembly (1) comprises a pressing frame (11) and a pressing plate (12), wherein the pressing plate (12) is mounted on the pressing frame (11) in a rotatable manner relative to the pressing frame (11), and the pressing frame (11) is mounted together with a frame (21) of a cutting assembly (2) of a cutting device and can move linearly following the cutting assembly (2). When the cutting assembly (2) cuts the sheet (3), the pressing plate (12) contacts the sheet (3) and applies a certain force to make the sheet (3) smoother. When the cutting assembly (2) moves relative to the sheet (3), the pressing plate (12) can rotate or move freely under the action of the friction between the pressing plate and the sheet (3).

2. The cutting head according to claim 1, characterized in that: The pressing plate (12) is mounted on the pressing frame (11) via a bearing (126). The pressing plate (12) is provided with a bottom surface (121) and a side surface (122). The side surface (122) is a conical surface, and the bottom surface (121) is an annular surface.

3. The cutting head according to claim 1, characterized in that: The pressing frame (11) is provided with a first rod (111) and a second rod (112), and the cutting assembly (2) is provided with a first sliding hole (211) and a second sliding hole (212). The first rod (111) is installed in the first sliding hole (211) so that the first rod (111) can move up and down relative to the first sliding hole (211), and the second rod (112) is installed in the second sliding hole (212) so that the second rod (112) can move up and down relative to the second sliding hole (212).

4. The cutting head according to claim 1, characterized in that: A first spring (213) and a second spring (214) are provided between the pressing frame (11) and the cutting assembly (2), wherein the first spring (213) generates an upward elastic force on the pressing frame (11), and the second spring (214) generates a downward elastic force on the pressing frame (11), so that the pressing frame (11) is subjected to the elastic forces of the first spring (213) and the second spring (214) when moving up and down.

5. The cutting head according to claim 4, characterized in that: A first adjusting member (215) and a first positioning sleeve (216) are provided between the material pressing frame (11) and the cutting assembly (2). The first end of the first adjusting member (215) abuts against the first spring (213) or the second spring (214). The first positioning sleeve (216) abuts against the second end of the first spring (213) and the second end of the second spring (214). The first adjusting member (215) adjusts the compression amount of the first spring (213) and the second spring (214) by adjusting the position relative to the first positioning sleeve (216) to change the position of the material pressing frame (11).

6. The cutting head according to claim 1, characterized in that: The pressing plate (12) is mounted on the pressing frame (11) via a self-aligning ball bearing (120), the relative inclination range between the inner ring centerline and the outer ring centerline of the self-aligning ball bearing (120) does not exceed 3°, and the bottom of the pressing plate (12) is conical and the cone angle is less than 5°.

7. The cutting head according to any one of claims 1 to 6, characterized in that: The pressing plate (12) is provided with a bottom surface (121) and a side surface (122), the side surface (122) is a conical surface, and the bottom surface (121) is a circular ring-shaped plane. A bearing mounting hole (123) is provided at the center of the pressing plate (12), and the bearing mounting hole (123) is eccentrically arranged. A first beveled surface (124) is provided on one side of the bearing mounting hole (123), and a second beveled surface (125) is provided on the opposite side, so that upward inclined surfaces are formed on both sides of the bearing mounting hole (123).

8. Cutting device, characterized in that: The cutting device is provided with a cutting head as described in any one of claims 1-7.

9. The cutting device according to claim 8, characterized in that: The cutting assembly (2) is provided with a first punch (26), and the first punch (26) is provided with a first presser foot (27).

10. The cutting device according to claim 9, characterized in that: The cutting assembly (2) is provided with a vibrating cutter head (22) for achieving cutting by high-frequency vibration.

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