Pressing device of cutting knife
By adopting the first and second pressing mechanisms in the cutting device to adjust the friction force and state position, the problem of increased friction force of the cutting device when cutting uneven sheets is solved, single-device multi-functional cutting is achieved, cutting accuracy and efficiency are improved, and production costs are reduced.
Patent Information
- Application Number
- CN202422664956.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-11-01
AI Technical Summary
When existing cutting devices cut uneven sheets, increased friction reduces cutting accuracy and requires multiple devices to process different shapes separately, increasing costs.
The first and second pressing mechanisms are adopted to achieve multifunctional cutting with a single device by adjusting the state position and friction of the pressing mechanisms, thereby reducing friction and improving cutting accuracy.
Achieve cutting and punching functions on a single device, reduce friction, improve cutting accuracy and efficiency, and reduce production costs.
Smart Images
Figure CN223301859U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of cutting technology, and in particular to a material pressing device for a cutting knife. Background Art
[0002] For the processing of sheet materials, a cutting knife is generally required. Usually, a cutting knife includes a cutting knife and a punching knife. The cutting knife can cut the sheet material into different shapes, and the punching knife can process smaller hole structures. The processing speed is faster than that of the cutting knife. Due to the different processing forms, two devices are usually required for separate processing.
[0003] 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 pressing device for the cutting knife such as a pressure plate is generally provided. However, 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 the sheet to 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.
[0004] Existing punching devices are generally used to process relatively hard materials. Leather materials can also be processed by punching devices. The punching device is more efficient in processing hole shapes, but different holes require different tools, so the number of tools is large. Therefore, it is generally used in structures with a large number of holes. However, unlike the cutting device, the sheet material will be subjected to a large vertical force during the punching process, and a corresponding pressing structure needs to be set to limit the position of the sheet material. Utility Model Content
[0005] In response to the above-mentioned prior art, the purpose of this application is to propose a cutting knife pressing device, which not only reduces the friction between the cutting knife pressing device 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.
[0006] According to the present application, a pressing device for a cutting knife is provided, including a first pressing mechanism and a second pressing mechanism, the first pressing mechanism is provided with a first through hole, the second pressing mechanism is provided with a second through hole, the first pressing mechanism is arranged at the lower end of the first punching mechanism, and the second pressing mechanism is arranged at the lower end of the second punching mechanism, when the first punching mechanism is working, the tool can pass through the first through hole, when the second punching mechanism is working, the tool can pass through the second through hole, the second pressing mechanism can move up and down and is provided with a first state position and a second state position, the first state position is higher than the second state position, and the second pressing mechanism is in the first state position when the first punching mechanism is working.
[0007] Compared with the prior art, the present application provides a cutting knife pressing device with the following beneficial effects: when cutting the sheet, the first punching mechanism enters the working state, the second pressing mechanism is in the first state position and does not contact the sheet, the first pressing mechanism is also in close contact with the sheet and limits the position of the sheet in the up and down directions, which can produce less pressure on the sheet, the first punching mechanism stops working, the second punching mechanism enters the working state, the second pressing mechanism is in the second state position and contacts the sheet and produces greater pressure on the sheet, the first pressing mechanism can also produce less pressure on the sheet, and does not affect the operation of the second punching mechanism. In this way, two processing methods can be realized in one device. Existing equipment basically uses CNC to realize automatic processing, which can reduce the processing steps and make sheet processing more convenient and quick.
[0008] In one embodiment, the first pressing mechanism includes a pressing frame and a pressing plate. The pressing plate is installed on the pressing frame in a rotatable manner relative to the pressing frame. The pressing frame is installed together with the frame of the cutting device head and can move linearly with the head. When the head cuts the sheet, the pressing plate contacts the sheet and applies a certain force to make the sheet smoother. When the head moves relative to the sheet, the pressing plate rotates or moves freely under the action of the friction between the sheet and the head. When the head of the cutting device moves at high speed, the pressing plate of the pressing device of the cutting knife contacts the sheet and generates a certain friction force. The pressing plate can rotate and has a rotation center, but the friction on both sides of the rotation center is difficult to balance. Once the friction on one side of the rotation center is greater than the friction on the other side, the 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 generated by the leather and metal surface is greater than the dynamic friction. When the pressing 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 pressing plate. The friction at other positions is also increased, so the resistance generated by the overall friction will be reduced, just like the rolling friction is less than the friction of the plane movement. The action of force is mutual, the force on the pressing 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.
[0009] 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.
[0010] 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.
[0011] In one embodiment, the press frame is fixedly connected to the machine head via a sliding track so that the press frame can move up and down relative to the machine head within a certain range.
[0012] 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.
[0013] 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.
[0014] 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°.
[0015] 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.
[0016] In one embodiment, the second punching mechanism is provided with a first punch, the second pressing mechanism is provided with a first presser foot, the first presser foot is driven by the first cylinder to move up and down, the first punch is driven by the first rotating wheel to rotate, the first presser foot is provided with a first guide rod and a second guide rod, the first guide rod and the second guide rod guide the first presser foot to move up and down, the first guide rod is provided with a buffer spring, and the first cylinder pushes the first presser foot up and down through the buffer spring.
[0017] In one embodiment, the second punching mechanism is further provided with a second punch, and the second punch is designed side by side with the first punch and adopts the same structural design.
[0018] 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
[0019] 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:
[0020] In the drawings, the same or corresponding reference numerals denote the same or corresponding parts.
[0021] Figure 1 A three-dimensional schematic diagram of the first pressing mechanism of the cutting knife according to an embodiment of the present application is shown;
[0022] Figure 2 An exploded schematic diagram of the first material pressing mechanism of the cutting knife according to an embodiment of the present application is shown;
[0023] Figure 3 A three-dimensional schematic diagram of the head of the cutting device according to an embodiment of the present application is shown;
[0024] Figure 4 A schematic side view of the cutting head of the cutting device according to an embodiment of the present application is shown;
[0025] Figure 5 Shown Figure 4 Schematic cross-sectional view along the AA direction;
[0026] Figure 6 Shown Figure 4 Schematic cross-sectional view in the middle BB direction;
[0027] Figure 7 A front view of the cutting device according to an embodiment of the present application is shown;
[0028] Figure 8 Shown Figure 7 Schematic cross-sectional view in the CC direction;
[0029] Figure 9 A schematic cross-sectional view of the head of the cutting device according to an embodiment of the present application is shown;
[0030] Figure 10 Shown Figure 9 A partial enlarged schematic diagram of point D in the middle;
[0031] Figure 11 A three-dimensional schematic diagram of a material pressing plate of a material pressing device of a cutting knife according to an embodiment of the present application is shown;
[0032] Figure 12 A side view of a pressing disc of a pressing device of a cutting knife according to an embodiment of the present application squeezing a sheet of material is shown. DETAILED DESCRIPTION
[0033] 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.
[0034] Example 1:
[0035] like Figure 1 、 Figure 2 、 Figure 3 As shown, a pressing device for a cutting knife includes a first pressing mechanism 1 and a second pressing mechanism 5. The first pressing mechanism 1 is provided with a first through hole 6, and the second pressing mechanism 5 is provided with a second through hole 7. The first pressing mechanism 1 is arranged at the lower end of the first punching mechanism 8, and the second pressing mechanism 5 is arranged at the lower end of the second punching mechanism 9. When the first punching mechanism 8 is working, the tool can pass through the first through hole 6, and when the second punching mechanism 9 is working, the tool can pass through the second through hole 7. The second pressing mechanism 5 can move up and down and is provided with a first state position and a second state position. The first state position is higher than the second state position. When the first punching mechanism 8 is working, the second pressing mechanism 5 is in the first state position. In the first state position, the second pressing mechanism 5 does not contact the sheet material 3. In the second state position, the second pressing mechanism 5 contacts the sheet material 3 and generates a certain pressure on the sheet material 3. Generally speaking, the pressure of the second pressing mechanism 5 needs to be greater than 20N. Generally speaking, the greater the pressure, the more stable it is, and it is sufficient not to damage the leather.
[0036] like Figure 1 、 Figure 2 、 Figure 3As shown, the first pressing mechanism 1 includes a pressing frame 11 and a pressing plate 12. The pressing plate 12 is mounted on the pressing frame 11 in a rotatable manner relative to the pressing frame 11. The pressing frame 11 is mounted together with the frame 21 of the cutting device head 2 and can move linearly with the head 2. When the head 2 cuts the sheet 3, the pressing plate 12 contacts the sheet 3 and applies a certain force to make the sheet 3 flatter. When the head 2 moves relative to the sheet 3, the pressing plate 12 can rotate or move freely under the action of the friction between it and the sheet 3. The sheet 3 can be leather, cloth, PVC mesh cloth, EVA foam, etc. However, leather is more difficult to cut than other materials. Therefore, the embodiment of the present application has a more obvious technical effect on cutting leather. Because leather has a higher hardness than other materials, the pressing plate 12 is required to limit the position of the leather during cutting. The existing technology has a large resistance without improvement, and is prone to accidents, especially during high-speed cutting, such as local obstruction and wrinkling, forcing the machine to stop and requiring manual intervention, resulting in low production efficiency. The technical solution of the present application improves the pressing plate 12, which can greatly reduce the resistance, reduce the occurrence of accidents in production, avoid a large amount of leather being scrapped after cutting errors, and reduce production costs. Even if the leather material is the same, the friction coefficient at different positions is different, and the friction number in some areas varies greatly. In this way, the resistance changes greatly when using a common pressing 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 pressing plate 12 is uneven, it has a significant effect. 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, 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 using better bearings, 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.
[0037] like Figure 1 and Figure 2 As 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.
[0038] 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 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 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.
[0039] 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 it moves up and down.
[0040] like Figure 1 、 Figure 2 and Figure 5 As 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, 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 machine head 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.
[0041] Example 2:
[0042] like Figure 3 and Figure 4 As shown, the cutting device includes a machine head 2 equipped with the first pressing mechanism 1 and the first punching mechanism 8 of Example 1. The first punching mechanism 8 is provided with a cutter head 22, a first driving mechanism 23, a second driving structure 24, a tool holder 25 and a machine frame 21. The cutter head 22 is installed on the tool holder 25, and the tool holder 25 is installed on the machine 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 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 set to realize mechanical vibration of the cutter head 22 through a transmission structure.
[0043] like Figure 5 As shown, the first pressing mechanism 1 realizes the limiting function through the first spring 213 and the second spring 214. The position of the first pressing mechanism 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 first pressing mechanism 1. The cutter head 22 rotates with the first driving structure to realize cutting in different directions.
[0044] like Figure 4 and Figure 6 As shown, the second blanking mechanism 9 is equipped with a first punch 26, and the second presser mechanism 5 is equipped with a first presser foot 27. The first presser foot 27 is driven up and down by a first cylinder 28, and the first punch 26 is rotated by a first rotating wheel 30. The first presser foot 27 is equipped with a first guide rod 271 and a second guide rod 272, which guide the first presser foot 27 up and down. The first guide rod 271 is equipped with a buffer spring 273, and the first cylinder 28 pushes the first presser foot 27 up and down via the buffer spring 273. The second blanking mechanism 9 also has a second punch 29, which is designed side by side with the first punch 26 and adopts the same structural design. When processing thicker or harder sheet material 3, the second punch 29 and the first punch 26 can rotate to achieve a gradual downward punching while rotating.
[0045] 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 first pressing mechanism 1 move synchronously.
[0046] Example 3:
[0047] like Figure 10 and Figure 11 As 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.
[0048] like Figure 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 forces of the first spring 213 and the second spring 214 when it moves up and down.
[0049] Example 4:
[0050] like Figure 12As 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.
[0051] like Figure 12 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.
[0052] 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.
[0053] 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.
[0054] 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 material pressing device for a cutting knife, characterized in that: The invention comprises a first pressing mechanism (1) and a second pressing mechanism (5), wherein the first pressing mechanism (1) is provided with a first through hole (6), and the second pressing mechanism (5) is provided with a second through hole (7). The first pressing mechanism (1) is arranged at the lower end of the first punching mechanism (8), and the second pressing mechanism (5) is arranged at the lower end of the second punching mechanism (9). When the first punching mechanism (8) is working, the tool can pass through the first through hole (6), and when the second punching mechanism (9) is working, the tool can pass through the second through hole (7). The second pressing mechanism (5) can move up and down and is provided with a first state position and a second state position, wherein the first state position is higher than the second state position. When the first punching mechanism (8) is working, the second pressing mechanism (5) is in the first state position.
2. The material pressing device of the cutting knife according to claim 1, characterized in that: The first pressing mechanism (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 machine head (2) of a cutting device and can move linearly following the machine head (2). When the machine head (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 machine head (2) moves relative to the sheet (3), the pressing plate (12) can rotate or move freely under the action of the friction between the sheet (3) and the pressing plate (12).
3. The material pressing device of the cutting knife according to claim 2, 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.
4. The material pressing device of the cutting knife according to claim 2, characterized in that: The press frame (11) is provided with a first rod (111) and a second rod (112), and 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).
5. The material pressing device of the cutting knife according to claim 2, characterized in that: A first spring (213) and a second spring (214) are provided between the pressing frame (11) and the machine head (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.
6. The material pressing device of the cutting knife according to claim 5, 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).
7. The material pressing device of the cutting knife according to claim 2, 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°.
8. The pressing device of the cutting blade according to any one of claims 2 to 7, 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).
9. The material pressing device of the cutting knife according to claim 8, characterized in that: The second punching mechanism (9) is provided with a first punch (26), and the second pressing mechanism (5) is provided with a first presser foot (27). The first presser foot (27) is driven by a first cylinder (28) to move up and down, and the first punch (26) is driven by a 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).
10. The material pressing device of the cutting knife according to claim 9, characterized in that: The second punching mechanism (9) is further provided with a second punch (29), and the second punch (29) and the first punch (26) are designed side by side and adopt the same structural design.