Pressing assembly and cutting device

Abstract

The invention provides a material pressing assembly which is used for a cutting device and comprises a material pressing frame and a material pressing disc, 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, and the material pressing frame and a machine frame of a machine head of the cutting device are installed together and can move along with the machine head. When the machine head cuts the sheet material, the material pressing disc makes contact with the sheet material and exerts certain acting force to make the sheet material smoother, when the machine head moves relative to the sheet material, the material pressing disc freely rotates or moves under the action of friction force between the material pressing disc and the sheet material, when the machine head of the cutting device moves at a high speed, the material pressing disc of the material pressing assembly makes contact with the sheet material to generate certain friction force, and therefore the sheet material can be cut more smoothly. The rotating center exists in rotation of the material pressing disc, but friction force is not balanced, so that the material pressing disc can rotate at will, the overall resistance is reduced, the stress of the material pressing disc is reduced, the stress of the sheet material is also reduced, the sheet material 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 material pressing component and a cutting device. Background Art

[0002] Existing cutting devices are generally used for cutting 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 partially uneven, it will affect the cutting effect and efficiency. Therefore, a pressing component such as a pressing plate is generally provided. However, the existing pressing plate is usually fixed to the head of the cutting device, so that the friction between the pressing plate and the cut sheet is relatively 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 pressing plate will cause the sheet to wrinkle locally or move. This will not only affect the cutting accuracy, but may also cause the sheet to be scrapped. It will not only affect the processing accuracy, but also increase 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 the 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] Chinese patent announcement number "CN109971896B" and patent name "A vibrating knife leather cutting device with a leather-proof 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] The 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 set, the rotating cutter disc assembly is used to drive the cutter to turn. 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 the "CN104608162A" patent solution. There is also a large friction force when moving at high speed, which is easy to squeeze the leather and cause the leather to wrinkle, 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 a pressure plate box is installed on a limit reinforcement ring, that is to say, the pressure plate box is basically the same as the "CN104608162A" patent scheme, and also has a large friction force, which is easy to squeeze the leather and cause leather wrinkling, affecting 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 internal cutter rotates to achieve cutting in different directions. Summary of the invention

[0008] In view of the above-mentioned prior art, the purpose of this application is to propose a pressing assembly and a cutting device, which can not only reduce the friction between the pressing assembly and the pressed sheet when the cutting device 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 material pressing assembly is provided for a cutting device, comprising a material pressing frame and a material pressing plate. The material pressing plate is mounted to the material pressing frame in a rotatable manner relative to the material pressing frame. The material pressing frame is mounted together with a frame of a cutting device head and can move with the head. When the head cuts the sheet, the material pressing plate contacts the sheet and applies a certain force to make the sheet smoother. When the head moves relative to the sheet, the material pressing plate rotates or moves freely under the action of the friction between the head and the sheet.

[0010] Compared with the prior art, a material pressing assembly of the present application has the following beneficial effects: when the head of the cutting device moves at a high speed, the material pressing plate of the material pressing assembly contacts the sheet material and generates a certain friction force. The material pressing plate can rotate and has a rotation center, but the friction forces on both sides of the rotation center are difficult to balance. Once the friction force on one side of the rotation center is greater than the friction force on the other side, the material pressing 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 material pressing plate rotates, although the speed of some positions is relatively small relative to the sheet material, if it is seen that there is no relative movement at this part of the position, it will basically not generate resistance that affects the movement of the material pressing 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 material pressing plate is reduced, and the force on the sheet material will also be reduced. In this way, the sheet material is not easy to wrinkle during high-speed cutting, and the cutting speed can also be further improved.

[0011] In one possible implementation manner, the material pressing plate is mounted on the material pressing frame via a bearing, and the material pressing plate is provided with a bottom surface and a side surface, the side surface is a conical surface, and the bottom surface is a circular ring shape.

[0012] In one embodiment, the pressing frame is provided with a first rod and a second rod, the machine head 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 possible implementation manner, the press frame is fixedly connected to the machine head via a sliding track so that the press frame can move up and down within a certain range relative to the machine head.

[0014] In one embodiment, a first spring and a second spring are provided between the press frame and the machine head. 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 machine head, 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 possible implementation, the pressure plate is installed on the pressure frame through a self-aligning ball bearing, the relative inclination range of 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 a cone with a cone angle less than 5°.

[0017] In one possible implementation mode, the pressure plate is provided with a bottom surface and a side surface, the side surface is a conical surface, and the bottom surface is a circular ring-shaped plane. A bearing mounting hole is provided at the center of the pressure plate, and the bearing mounting hole is eccentrically arranged. A first beveled surface is provided on the side toward which the bearing mounting hole is deviated, and a second beveled 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 a machine head equipped with the above-mentioned pressing device.

[0019] In one possible implementation manner, the machine head is provided with a first punch, and the first punch is provided with a first presser foot.

[0020] In one possible implementation manner, the 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, a cutting device in the present application has the following beneficial effects: the cutting device uses the above-mentioned material pressing assembly, which can reduce the movement resistance during the cutting process, reduce the wrinkling phenomenon of the sheet material, make the cutting more stable, and the cutting efficiency is also higher.

[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] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present application will become readily understood. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, wherein: In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0024] Figure 1 A three-dimensional schematic diagram of a material pressing assembly according to an embodiment of the present application is shown; Figure 2 An exploded schematic diagram of a material pressing assembly according to an embodiment of the present application is shown; Figure 3 A three-dimensional schematic diagram of the head of the cutting device according to an embodiment of the present application is shown; Figure 4 A schematic side view of the head of the cutting device according to an embodiment of the present application is shown; Figure 5 Shows Figure 4 Schematic cross-sectional view along the AA direction; Figure 6 Shows Figure 4 Schematic cross-sectional view in the middle BB direction; Figure 7 A front schematic diagram of a cutting device according to an embodiment of the present application is shown; Figure 8 Shows Figure 7 Schematic cross-sectional view in the CC direction; Fig. 9 A three-dimensional schematic diagram of the head of the cutting device according to an embodiment of the present application is shown; Fig.10 A schematic cross-sectional view of a machine head of a cutting device according to an embodiment of the present application is shown; Fig.11 Shows Fig.10 The partial enlarged schematic diagram of point D in the middle; Fig.12 A three-dimensional schematic diagram of a material pressing plate of a material pressing assembly according to an embodiment of the present application is shown; Fig.13 A side schematic diagram of a material pressing disk of a material pressing assembly according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0025] In order to make the purpose, features, and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0026] Embodiment 1: like Figure 1 , Figure 2 , Figure 3 and Fig.13 As shown, a material pressing assembly is used in a cutting device, including a material pressing frame 11 and a material pressing plate 12. The material pressing plate 12 is mounted on the material pressing frame 11 in a rotatable manner relative to the material pressing frame 11. The material pressing frame 11 is mounted together with the frame 21 of the head 2 of the cutting device and can move linearly with the head 2. When the head 2 cuts the sheet 3, the material pressing plate 12 contacts the sheet 3 and applies a certain force to make the sheet 3 smoother. When the head 2 moves relative to the sheet 3, the material pressing plate 12 rotates or moves freely under the friction between the sheet 3 and the sheet 3. The sheet 3 can be leather, cloth, PVC mesh cloth, EVA foam, etc., but 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 has a higher hardness than other materials, the material pressing 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 speed, it is easy to cause accidents, such as local obstruction and wrinkling, forcing the machine to stop and requiring manual intervention, and the production efficiency is low. After the technical solution of the present application improves the pressing plate 12, the resistance can be greatly reduced, the accidents in production can be reduced, a large amount of leather can be scrapped after cutting errors, and the production cost can be reduced. Even if the leather material is the same, the friction coefficients at different positions are different, and the friction coefficients in some areas vary greatly. In this way, the resistance changes greatly when the ordinary pressing plate structure is adopted. The technical solution of the present application can balance this change, especially when the friction forces on both sides of the rotation center of the pressing plate 12 are unbalanced, and it has a significant effect. Rotation is used to reduce this friction resistance. Even if the friction forces on both sides are 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 forces on both sides are the same, rotation may not occur, but in fact this is 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 a better bearing is used, the pressing plate 12 always keeps rotating or rotating back and forth during the movement. The positive pressure between the pressing plate 12 and the sheet material 3 is generally controlled at about 1N-10N, preferably 2N. When the positive pressure is controlled at 2N, the cutting of the moving pressing plate 12 is relatively stable.

[0027] like Figure 1 and Figure 2 As shown, the pressing plate 12 is mounted to the pressing frame 11 through 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°. The bottom surface 121 is annular and can be a flat annular surface. The bottom surface 121 and the conical surface are transitioned through a fillet. The bottom surface 121 can be designed to be square or elliptical, 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, so a disc-shaped structure is conventionally adopted.

[0028] like Figure 1 and Figure 2 As shown, the press frame 11 is provided with a first rod 111 and a second rod 112, the machine head 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 first locking groove 115 can adjust the groove width by a screw, and the size of the first hole 113 is also changed after the groove width changes, and the first rod 111 can be locked by reducing the width of the first locking groove 115, and the second rod 112 can be locked by reducing the width of the second locking groove 116.

[0029] 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 machine head 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 moving up and down.

[0030] 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 machine head 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 press frame 11. The first positioning sleeve 216 can be configured as an upper sleeve 217 and a lower sleeve 218 installed in the first slide hole 211 of the machine head 2, which is convenient for replacement 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, the friction resistance when the pressing plate 12 moves to the thicker area is relatively large. The 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, avoid the sheet material 3 from warping, and make the sheet material 3 close to the work surface.

[0031] Embodiment 2: like Figure 3 and Figure 4 As shown, the cutting device includes a machine head 2 equipped with the pressing device 1 of Example 1, and the machine head 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 installed on the tool holder 25, and the tool holder 25 is installed on the frame 21. The first driving mechanism 23 drives the cutter head 22 to rotate, and 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 material 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 realize high-frequency vibration driving the cutter head 22 for cutting using a pneumatic structure. Of course, a motor can also be set to realize mechanical vibration of the cutter head 22 through a transmission structure.

[0032] 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.

[0033] like Figure 4 and Figure 6As shown, the machine head 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 machine head 2 is also provided with a second punch 29. The second punch 29 and the first punch 26 are of the same design. When processing thicker sheets 3 or harder sheets 3, the second punch 29 and the first punch 26 can be rotated to achieve gradual punching while rotating and moving downward.

[0034] like Figure 7 and Figure 8 As shown, the machine head 2 is provided with a first drive motor 219, and the first drive 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.

[0035] Embodiment 3: like Fig. 9 As shown, the press 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 outside the tool holder 25 in the circumferential direction, and the machine head 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 member 215.

[0036] Embodiment 4: like Fig.10 and Fig.11As shown, the pressure plate 12 is installed on the pressure 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 pressure plates 12 with a diameter of more than 80 mm, the inclination range of the pressure plate 12 should be controlled within 1.5°, and preferably can be 1°. For pressure plates 12 within 40 mm, a 3° inclination can be considered. The bottom of the pressure plate 12 is conical and the cone angle is less than 5°. This can reduce the contact area of ​​the resistance position in the area of ​​greater friction like a roller.

[0037] like Fig.10 As shown, the press frame 11 is fixedly connected to the machine head 2 via a sliding track so that the press frame 11 can move up and down within a certain range relative to the machine head 2. A first spring 213 and a second spring 214 are provided between the press frame 11 and the machine head 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 force of the first spring 213 and the second spring 214 when moving up and down.

[0038] Embodiment 5: like Fig.12 and Fig.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-shaped 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 chamfered surface 124 is provided on the side toward which the bearing mounting hole 123 is biased, and a second chamfered surface 125 is provided on the opposite side, so that inclined upward inclined surfaces are formed on both sides of the bearing mounting hole 123, the inclination angle of the first chamfered surface 124 is less than 15°, and the inclination angle of the second chamfered surface 125 is less than 3°. Preferably, the inclination angle of the first chamfered surface 124 of the pressing plate 12 with a diameter of 80 mm is 5°, and the inclination angle of the second chamfered surface 125 is 1°, so that the contact area with the sheet material 3 on the side of the second chamfered 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. In this way, the effective area on the side of the pressing plate 12 in the feeding direction can be reduced, and the resistance in front of the forward direction can be reduced. 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 the present 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, so that the main resistance is concentrated on the left and right sides, which is also the advantageous action position of the present application, that is, the force on the side with greater resistance is resolved by rotation.

[0039] like Fig.12 and Fig.13As shown, the leather and other sheet materials 3 have a certain elasticity, so the thickness of the position where the pressing plate 12 acts is slightly smaller, and the position where the pressing plate 12 is not in a fluffy state will be slightly higher than the lowest position of the pressing plate 12, so that the pressing plate 12 will also have a certain force on the front when it moves at high speed, which is equivalent to the resistance of a car climbing a slope. Although the distance is increased by the rotation method, the resistance is reduced, just like the car does not move forward in a straight line when climbing a slope, 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-line movement of the pressing plate 12, and it can move faster under the premise of reducing resistance. Of course, the pressing plate 12 of this embodiment will only swing forward within a certain range when the friction force is relatively balanced, and will only rotate when the friction force difference on both sides is large, which has obvious advantages compared with the fixed pressing plate of the prior art. The area of ​​the first chamfered surface 124 is relatively large in front of the ordinary conical surface, and it is not easy to produce the phenomenon of local wrinkling caused by concentrated force, and it is also more stable during high-speed cutting.

[0040] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this application can be executed in parallel, sequentially or in different orders, as long as the expected results of the technical solution of this application can be achieved, and this document does not limit this.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A material pressing assembly for a cutting device, comprising a material pressing frame (11) and a material pressing plate (12), characterized in that: The material pressing plate (12) is mounted on the material pressing frame (11) in a rotatable manner relative to the material pressing frame (11); the material pressing frame (11) is mounted together with a frame (21) of a machine head (2) of a cutting device and can move along with the machine head (2); when the machine head (2) cuts the sheet (3), the material pressing plate (12) contacts the sheet (3) and applies a certain force to make the sheet (3) smoother; when the machine head (2) moves relative to the sheet (3), the material pressing plate (12) freely rotates or moves under the action of the friction between the machine head (2) and the sheet (3).

2. The pressing assembly according to claim 1, characterized in that: The material pressing plate (12) is mounted on the material pressing frame (11) via a bearing (126); the material 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.

3. The pressing assembly according to claim 1, characterized in that: The press frame (11) is provided with a first rod (111) and a second rod (112); the machine head (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); 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 pressing assembly according to claim 1, characterized in that: A first spring (213) and a second spring (214) are provided between the press frame (11) and the machine head (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 acted upon by the elastic forces of the first spring (213) and the second spring (214) when moving up and down.

5. The pressing assembly according to claim 4, characterized in that: A first adjusting member (215) and a first positioning sleeve (216) are provided between the press frame (11) and the machine head (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 press frame (11).

6. The pressing assembly 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°; the bottom of the pressing plate (12) is conical and the cone angle is less than 5°.

7. The pressing assembly according to any one of claims 1 to 6, characterized in that: The material 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 material 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 upwardly inclined beveled 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 machine head (2), and the machine head (2) is equipped with a material pressing device (1) as described in any one of claims 1 to 7.

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

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

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