Vacuum adsorption micro-blowing structure of cutting bed and control method

Abstract

The invention provides a vacuum adsorption micro-blowing structure of a cutting bed and a control method. The vacuum adsorption micro-blowing structure is applied to the cutting bed. Comprising a vacuum pump, a micro-blowing structure box and a bed body connecting pipeline, the vacuum pump is connected with the micro-blowing structure box, and the micro-blowing structure box is connected with the bed body connecting pipeline; the vacuum pump is used for carrying out negative pressure adsorption on a cut material on the cutting bed through the micro-blowing structure box and the bed body connecting pipeline; the micro-blowing structure box comprises a box body, a vacuum pump air suction pipe, a vacuum pump air outlet pipe, an air return pipe and an air return pipe plugging assembly, and the vacuum pump air suction pipe and the vacuum pump air outlet pipe are both arranged in the box body. The opening degree of the pressure release valve assembly can be adjusted, an operator can adjust the opening degree of the pressure release valve assembly according to materials of cut materials on the cutting bed, and therefore the reverse blowing wind power can be adjusted, and the reverse blowing wind power can be accurately and controllably adjusted according to the cut materials with different material characteristics.

Description

Technical Field

[0001] This invention relates to the field of cutting bed equipment technology, and in particular to a cutting bed vacuum adsorption micro-blowing structure and control method. Background Technology

[0002] A cutting table is a device used for cutting materials such as leather, imitation leather, fabric, and cardboard. The quality of the cutting directly affects the quality of the finished product and its wearing effect. The cutting process involves laying one or more layers of material flat on the cutting table, then drawing lines on the surface of the top layer, and finally cutting along the drawn lines. The cutting table usually has air extraction holes for vacuum extraction, which firmly adheres the material to the worktable, preventing material shifting during cutting and thus affecting the accuracy of the cutting dimensions and the garment's pattern.

[0003] Currently, most vacuum adsorption systems for cutting beds on the market use a vacuum pump and a forward and reverse blowing structure to achieve negative pressure adsorption of the cut material. When the vacuum pump draws air through the forward and reverse blowing structure, the air resistance increases and gas leakage and waste are significant, resulting in a reduction of the bed's negative pressure value by about 10%. Furthermore, the noise level is extremely high, greatly affecting the working environment. In addition, the original structural components are large, expensive, time-consuming to install, and require a large amount of space for packaging; moreover, for some non-breathable fabrics and materials with poor adhesion, a higher vacuum adsorption capacity is required. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a cutting bed vacuum adsorption micro-blowing structure and control method to solve the problems of increased wind resistance, serious gas leakage and waste, and small negative pressure value in the prior art when vacuum pump and positive and negative blowing structure are combined.

[0005] To achieve the above and other related objectives, this invention provides a vacuum adsorption micro-blowing structure for a cutting bed, applied in a cutting bed; it includes a vacuum pump, a micro-blowing structure box, and a bed body connecting pipe. The vacuum pump is connected to the micro-blowing structure box, and the micro-blowing structure box is connected to the bed body connecting pipe. The vacuum pump uses negative pressure to adsorb the material on the cutting bed through the micro-blowing structure box and the bed body connecting pipe. The micro-blowing structure box includes a box body, a vacuum pump suction pipe, a vacuum pump outlet pipe, a return pipe, and a return pipe sealing assembly. The vacuum pump suction pipe and the vacuum pump outlet pipe are both disposed in the box body. One end of the vacuum pump suction pipe is connected to the bed body connecting pipe, and the other end is connected to the vacuum pump. One end of the vacuum pump outlet pipe is connected to the vacuum pump, and the other end is connected to the return pipe. The end of the return pipe away from the vacuum pump outlet pipe is connected to the vacuum pump suction pipe. The return pipe sealing assembly is used to control the opening and closing of the return pipe.

[0006] Preferably, an air outlet extension pipe is provided at the end of the vacuum pump outlet pipe away from the vacuum pump, the return air pipe is connected to the air outlet extension pipe, and the return air pipe sealing assembly is provided at the end of the air outlet extension pipe away from the vacuum pump outlet pipe to control the opening and closing of the air outlet extension pipe.

[0007] Preferably, the return air duct sealing assembly includes a return air duct sealing cylinder, a return air duct sealing cylinder piston rod, a return air duct plug, and a cylinder fixing block. The return air duct sealing cylinder is mounted on the end of the outlet extension pipe away from the vacuum pump outlet pipe via the cylinder fixing block. The return air duct sealing cylinder piston rod is slidably mounted in the return air duct sealing cylinder, and the return air duct plug is mounted on the return air duct sealing cylinder piston rod. The return air duct plug can block the end of the outlet extension pipe near the vacuum pump outlet pipe under the movement of the return air duct sealing cylinder piston rod.

[0008] Preferably, the micro-blowing structure box further includes a pressure relief valve assembly, which is disposed on the vacuum pump suction pipe and is used to relieve gas pressure in the vacuum pump suction pipe.

[0009] Preferably, the cutting bed further includes a control system, which is connected to the return air duct sealing assembly and the pressure relief valve assembly, and is used to control the opening and closing of the return air duct sealing assembly and the pressure relief valve assembly.

[0010] Preferably, the micro-blowing structure box further includes a silencer pipe, which includes a U-shaped pipe body and a silencer outlet. The U-shaped pipe body is disposed in the box body, one end of the U-shaped pipe body is connected to the vacuum pump outlet pipe, and the other end of the U-shaped pipe body is connected to the atmosphere through the silencer outlet.

[0011] Preferably, the vacuum pump outlet pipe and the vacuum pump suction pipe are parallel to each other, and the U-shaped pipe is located above the vacuum pump suction pipe and the vacuum pump outlet pipe, and the U-shaped pipe is perpendicular to the vacuum pump suction pipe in space.

[0012] Preferably, the cutting bed is further provided with a vacuum pump placement box, the vacuum pump is placed in the vacuum pump placement box, and the vacuum pump placement box is fixedly connected to the box body of the micro-blowing structure box; heat dissipation holes are opened on the outer peripheral surface of the vacuum pump placement box.

[0013] To achieve the above or other objectives, the present invention also discloses a control method for a cutting bed vacuum adsorption micro-blowing structure. The method employs the aforementioned cutting bed vacuum adsorption micro-blowing structure, which includes a control system connected to a return air duct sealing assembly for controlling the opening and closing of the return air duct sealing assembly. The steps are as follows:

[0014] S1: The control system closes the return air pipe through the return air pipe sealing component, the vacuum pump works, the vacuum pump uses the vacuum pump suction pipe and the bed body connecting pipe to perform negative pressure adsorption on the material on the cutting bed, the gas in the vacuum pump suction pipe and the bed body connecting pipe is transported by the vacuum pump and discharged from the vacuum pump outlet pipe; the cutting blade on the cutting bed cuts the material.

[0015] S2: After the material cutting in step S1 is completed, the vacuum pump continues to work. The control system opens the return air pipe through the return air pipe sealing component. After the gas in the vacuum pump suction pipe and the bed connecting pipe is transferred by the vacuum pump, part of it is discharged from the vacuum pump outlet pipe, and the other part enters the vacuum pump suction pipe through the return air pipe to realize the back blowing of the material.

[0016] Preferably, the micro-blowing structure box further includes a pressure relief valve assembly, which is installed on the vacuum pump suction pipe. The control system is connected to the pressure relief valve assembly to relieve the pressure of the gas in the vacuum pump suction pipe. In step S2, when the control system opens the return air pipe through the return air pipe sealing assembly, the control system opens the pressure relief valve assembly, and the pressure relief valve assembly relieves the pressure of the gas in the vacuum pump suction pipe.

[0017] As described above, the vacuum adsorption micro-blowing structure and control method for cutting beds involved in this invention have the following beneficial effects:

[0018] 1. The cutting bed vacuum adsorption micro-blowing structure and control method of the present invention eliminates the forward blowing mechanism in the prior art. There is no obstruction on the vacuum pump intake pipe. The present invention is equipped with a return air pipe and a return air pipe sealing component. The return air pipe can be opened by the return air pipe sealing component, so that the gas that was originally to be discharged can return to the vacuum pump intake pipe for reverse blowing, thereby reducing gas waste.

[0019] 2. The cutting bed vacuum adsorption micro-blowing structure and control method involved in this invention have an adjustable pressure relief valve assembly. The operator can adjust the opening of the pressure relief valve assembly according to the material of the material being cut on the cutting bed, thereby adjusting the strength of the back-blowing airflow. This allows for precise and controllable adjustment of the back-blowing airflow strength for different material characteristics.

[0020] 3. The cutting bed vacuum adsorption micro-blowing structure and control method of the present invention also includes a silencer tube in the micro-blowing structure box. Due to the presence of the silencer tube, the noise of the present application is reduced by about 5 decibels compared with the forward and reverse blowing structure in the prior art.

[0021] 4. The cutting bed vacuum adsorption micro-blowing structure involved in this invention has the advantages of integrated structure, controllable back-blowing wind force, ability to increase negative pressure vacuum adsorption value, and effective noise reduction. Attached Figure Description

[0022] Figure 1This is a spatial schematic diagram of the vacuum adsorption micro-blowing structure for a cutting bed involved in the present invention.

[0023] Figure 2 This is a partial cross-sectional view of the vacuum adsorption micro-blowing structure for a cutting bed involved in the present invention;

[0024] Figure 3 for Figure 2 Enlarged view of the mid-section view;

[0025] Figure 4 This is a schematic diagram of the vacuum adsorption micro-blowing structure for cutting beds involved in the present invention during forward air suction.

[0026] Figure 5 This is a schematic diagram of the cutting bed vacuum adsorption micro-blowing structure of the present invention during reverse air blowing.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Vacuum pump; 101. Vacuum pump housing box; 102. Heat dissipation hole; 2. Micro-blowing structure box; 201. Vacuum pump suction pipe; 202. Vacuum pump exhaust pipe; 203. Exhaust extension pipe; 204. Return air pipe plug; 205. Return air pipe sealing cylinder piston rod; 206. Cylinder fixing block; 207. Return air pipe sealing cylinder; 208. Return air pipe; 209. Pressure relief valve assembly; 210. Box body; 211. U-shaped pipe body; 212. Silencing air outlet. Detailed Implementation

[0029] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0030] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0031] like Figures 1-5As shown, this invention provides a vacuum adsorption micro-blowing structure for a cutting bed, applied in a cutting bed; it includes a vacuum pump 1, a micro-blowing structure box 2, and a bed body connecting pipe. The vacuum pump 1 is connected to the micro-blowing structure box 2, and the micro-blowing structure box 2 is connected to the bed body connecting pipe; the vacuum pump 1 uses negative pressure to adsorb the material on the cutting bed through the micro-blowing structure box 2 and the bed body connecting pipe; the micro-blowing structure box 2 includes a box body 210, a vacuum pump suction pipe 201, a vacuum pump outlet pipe 202, and a return air pipe 208. The vacuum pump suction pipe 201 and vacuum pump outlet pipe 202 are both installed in the housing 210. One end of the vacuum pump suction pipe 201 is connected to the bed connecting pipe, and the other end is connected to the vacuum pump 1. One end of the vacuum pump outlet pipe 202 is connected to the vacuum pump 1, and the other end is connected to the return air pipe 208. The end of the return air pipe 208 away from the vacuum pump outlet pipe 202 is connected to the vacuum pump suction pipe 201. The return air pipe sealing assembly is used to control the opening and closing of the return air pipe 208.

[0032] The present invention relates to a vacuum adsorption micro-blowing structure for a cutting table. A vacuum pump 1 is connected to the bed body via a vacuum pump suction pipe 201. When the vacuum pump 1 is working, air from the cutting area on the cutting table enters the vacuum pump 1 through the bed body connecting pipe and the vacuum pump suction pipe 201. The air in the vacuum pump suction pipe 201 is then discharged from the vacuum pump outlet pipe 202 after being transferred by the vacuum pump 1. Compared to the forward and reverse blowing structures in the prior art, there are no obstructions in the vacuum pump suction pipe 201 and the bed body connecting pipe, resulting in the maximum vacuum negative pressure adsorption value for the cut material. After the cutting is completed, the control system opens the return air pipe 208 through the return air pipe sealing component. Part of the air in the vacuum pump suction pipe 201 is discharged from the vacuum pump outlet pipe 202 after being transferred by the vacuum pump 1, while the other part enters the vacuum pump suction pipe 201 through the return air pipe 208, achieving reverse blowing of the cut material.

[0033] Preferred, such as Figures 2-5 As shown, an air outlet extension pipe 203 is provided at the end of the vacuum pump outlet pipe 202 away from the vacuum pump 1. The return air pipe 208 is connected to the air outlet extension pipe 203. The return air pipe sealing assembly is provided at the end of the air outlet extension pipe 203 away from the vacuum pump outlet pipe 202 and is used to control the opening and closing of the air outlet extension pipe 203.

[0034] Preferred, such as Figure 3As shown, the return air duct sealing assembly includes a return air duct sealing cylinder 207, a return air duct sealing cylinder piston rod 205, a return air duct plug 204, and a cylinder fixing block 206. The return air duct sealing cylinder 207 is mounted on the end of the outlet extension pipe 203 away from the vacuum pump outlet pipe 202 via the cylinder fixing block 206. The return air duct sealing cylinder piston rod 205 is slidably mounted in the return air duct sealing cylinder 207, and the return air duct plug 204 is mounted on the return air duct sealing cylinder piston rod 205. The return air duct plug 204 can block the end of the outlet extension pipe 203 near the vacuum pump outlet pipe 202 under the movement of the return air duct sealing cylinder piston rod 205. In this embodiment, the movement trajectory of the piston rod 205 of the return air duct sealing cylinder coincides with the extension direction of the vacuum pump outlet duct 202. That is, the piston rod 205 of the return air duct sealing cylinder drives the return air duct plug 204 to move in the outlet extension pipe 203. When it abuts against the end of the outlet extension pipe 203 near the vacuum pump outlet duct 202, the outlet extension pipe 203 is blocked, and therefore the return air duct 208 connected to the outlet extension pipe 203 is blocked. The diameter of the vacuum pump outlet duct 202 is smaller than the diameter of the outlet extension pipe 203, and the diameter of the return air duct plug 204 is larger than the diameter of the vacuum pump outlet duct 202 but smaller than the diameter of the outlet extension pipe 203. Therefore, it can move in the outlet extension pipe 203 and block the end of the vacuum pump outlet duct 202.

[0035] Preferred, such as Figures 3-5 As shown, the micro-blowing structure box 2 also includes a pressure relief valve assembly 209, which is installed on the vacuum pump suction pipe 201 and is used to relieve the pressure of the gas in the vacuum pump suction pipe 201.

[0036] Preferred, such as Figure 1 , Figure 2 As shown, the micro-blowing structure box 2 also includes a silencer pipe, which includes a U-shaped pipe body 211 and a silencer outlet 212. The U-shaped pipe body 211 is disposed in the box body 210. One end of the U-shaped pipe body 211 is connected to the vacuum pump outlet pipe 202, and the other end of the U-shaped pipe body 211 is connected to the atmosphere through the silencer outlet 212. Furthermore, in this embodiment, the vacuum pump outlet pipe 202 and the vacuum pump suction pipe 201 are parallel to each other. The U-shaped pipe body 211 is disposed above the vacuum pump suction pipe 201 and the vacuum pump outlet pipe 202, and the U-shaped pipe body 211 and the vacuum pump suction pipe 201 are perpendicular to each other in space. Integrating the U-shaped pipe body 211, the vacuum pump suction pipe 201, and the vacuum pump outlet pipe 202 into the box body 210 reduces the space occupied by the equipment.

[0037] Preferred, such as Figure 1 , Figure 2As shown, a vacuum pump placement box 101 is also provided in the cutting bed. The vacuum pump 1 is placed in the vacuum pump placement box 101. The vacuum pump placement box 101 is fixedly connected to the box body 210 of the micro-blowing structure box 2. Heat dissipation holes 102 are provided on the outer peripheral surface of the vacuum pump placement box 101.

[0038] In this embodiment, when the vacuum pump 1 is working, a vacuum or negative pressure is formed in the vacuum pump suction pipe 201, and a slight positive pressure is formed in the vacuum pump outlet pipe 202.

[0039] After the forward suction process of vacuum pump 1 ends, it immediately reverses to start the reverse blowing process. The return air pipe 208 connects the vacuum pump outlet pipe 202 and the vacuum pump suction pipe 201. Due to the long bed connecting pipe, the vacuum degree inside the bed connecting pipe is still lower than the external air pressure, and the material will still be attracted to the cutting table. After a period of return air, the slightly positive pressure gas enters the vacuum pump suction pipe 201 from the vacuum pump outlet pipe 202 to counteract the vacuum degree in the vacuum pump suction pipe 201. The vacuum degree inside the bed connecting pipe will be equal to or slightly higher than the external air pressure, so that the material can be freed from the suction force on the cutting table. The purpose of setting the pressure relief valve assembly 209 is to make the vacuum degree inside the bed connecting pipe quickly equal to the external air pressure, thereby shortening the delay of the reverse blowing.

[0040] Additionally, in this application, the back-blowing air force can be controlled by adjusting the opening degree of the pressure relief valve assembly 209. When the pressure relief valve assembly 209 is not open, the vacuum degree in the vacuum pump suction pipe 201 is relatively high. The positive pressure gas in the vacuum pump outlet pipe 202 enters the vacuum pump suction pipe 201 through the return air pipe 208, mainly to balance the vacuum degree in the vacuum pump suction pipe 201, which will offset part of the adsorption force on the cutting material. However, since the vacuum pump 1 is continuously working, it is possible that even if part of the adsorption force is offset, the cutting material will still be adsorbed on the cutting table, only the adsorption force will be reduced.

[0041] When the pressure relief valve assembly 209 is partially opened, the vacuum degree in the vacuum pump suction pipe 201 decreases. The positive pressure gas in the vacuum pump outlet pipe 202 enters the vacuum pump suction pipe 201 through the return air pipe 208 to first balance the vacuum degree in the vacuum pump suction pipe 201. Then the remaining part will enter the lower side of the cutting table through the bed connecting pipe, completely canceling the adsorption force of the cutting material. At this time, the cutting material is neither subjected to suction nor blowing force on the cutting table.

[0042] When the pressure relief valve assembly 209 is mostly open, the vacuum degree in the vacuum pump suction pipe 201 is further reduced. The positive pressure gas in the vacuum pump outlet pipe 202 enters the vacuum pump suction pipe 201 through the return air pipe 208 to first balance the vacuum degree in the vacuum pump suction pipe 201. Then the remaining part will enter the lower side of the cutting table through the bed connecting pipe. The remaining positive pressure gas is greater than the adsorption force of the material being cut. At this time, the material being cut is only subjected to blowing force on the cutting table.

[0043] When the pressure relief valve assembly 209 is fully open, the state is the same as when the pressure relief valve assembly 209 is mostly open, the only difference being that the material being cut experiences a greater blowing force. However, in this application, since the vacuum pump outlet pipe 202 is connected to a silencer pipe, the gas pressure in the return air pipe 208 is basically the same as the external pressure. That is, when the pressure relief valve assembly 209 is mostly open or fully open, the blowing force on the material will not be greater than the suction force of the material. In other words, when the pressure relief valve assembly 209 is mostly open or fully open, the state of the material is basically the same as the state where it is neither subjected to suction nor blowing force.

[0044] To achieve the above or other objectives, this invention also discloses a control method for a cutting bed vacuum adsorption micro-blowing structure. The method employs the aforementioned cutting bed vacuum adsorption micro-blowing structure, which includes a control system connected to a return air duct sealing assembly for controlling the opening and closing of the return air duct sealing assembly. The steps are as follows:

[0045] A1: According to the appendix Figures 1-5 The descriptions of the above-mentioned components are used to describe the production, manufacturing, and installation of each component.

[0046] A2: Place the material on the cutting table of the cutting machine; set the cutting parameters of the cutting machine according to the size and material parameters of the material;

[0047] A3: Start vacuum pump 1. Vacuum pump 1 generates negative pressure suction. The negative pressure suction appears below the cutting table through vacuum pump suction pipe 201 and bed connecting pipe, and then achieves negative pressure vacuum adsorption on the material on the cutting table. The material is adsorbed on the cutting table, which also realizes the positive suction function of vacuum pump 1. The air sucked in by vacuum pump suction pipe 201 is transferred by vacuum pump 1 and enters vacuum pump outlet pipe 202. After being silenced by silencer pipe, it is discharged into the atmosphere (at this time, return air pipe 208 is in a blocked state, or only a small amount of air enters, which has little impact on the adsorption value of the cutting table). Then the cutting blade of the cutting bed cuts the material according to the input cutting parameters.

[0048] A4: After the cutting blades on the cutting bed finish cutting the material, the return air pipe sealing cylinder 207 in the micro-blowing structure box 2 operates. The return air pipe sealing cylinder 207 drives the return air pipe plug 204 to open the return air pipe 208 through the return air pipe sealing cylinder piston rod 205. The vacuum pump outlet pipe 202 is connected to the vacuum pump suction pipe 201 through the return air pipe 208. At this time, the gas at the cutting point enters the vacuum pump 1 through the bed connecting pipe and the vacuum pump suction pipe 201. The air sucked in by the vacuum pump suction pipe 201 is transferred by the vacuum pump 1 and enters the vacuum pump outlet pipe 202. Part of the air in duct 202 is discharged into the atmosphere after being silenced by the silencer pipe, and the other part returns to the vacuum pump suction pipe 201 through the return air pipe 208. Part of the gas that returns to the vacuum pump suction pipe 201 returns to the vacuum pump 1. The other part of the gas that returns to the vacuum pump suction pipe 201 cancels the negative pressure gas in the bed connecting pipe, realizing the back-blowing of the material. When the vacuum pump 1 realizes the back-blowing of the material, the negative pressure adsorption force of the material on the cutting table is reduced, and the operator can remove the material from the cutting table manually or by means of a robotic arm.

[0049] Preferably, in step A4, when the vacuum pump 1 performs backflush, the pressure relief valve assembly 209 in the micro-blowing structure box 2 can be opened as needed, and the opening degree of the pressure relief valve assembly 209 can be adjusted as needed, thereby adjusting the backflush force by adjusting the opening degree of the pressure relief valve assembly 209.

[0050] Preferably, in this embodiment, the pressure relief valve assembly 209 and the return air duct sealing cylinder 207 are both controlled by a control system. The control system is matched with the cutting system of the cutting bed and the PC terminal to realize intelligent control by the operator, making the control more precise and intelligent.

[0051] The cutting bed vacuum adsorption micro-blowing structure and control method of this invention have lower wind resistance and better airtightness compared to the existing forward and reverse blowing structures. They can increase the maximum negative pressure value by about 20%, and the reverse blowing force can be flexibly adjusted according to actual production. The micro-blowing structure box 2 integrates a silencer tube, which significantly improves the overall noise reduction effect compared to the existing forward and reverse blowing structures, expected to reduce noise from the original 75 decibels to about 65 decibels. The cutting bed vacuum adsorption micro-blowing structure and control method of this invention have advantages such as integration, controllability, increased negative pressure value, adjustable reverse blowing value, and noise reduction.

[0052] Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0053] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A vacuum adsorption micro-blowing structure for a cutting bed, applied in a cutting bed; characterized in that: It includes a vacuum pump (1), a micro-blowing structure box (2), and a bed connecting pipe. The vacuum pump (1) is connected to the micro-blowing structure box (2), and the micro-blowing structure box (2) is connected to the bed connecting pipe. The vacuum pump (1) applies negative pressure to the material on the cutting bed through the micro-blowing structure box (2) and the bed connecting pipe. The micro-blowing structure box (2) includes a box body (210), a vacuum pump suction pipe (201), a vacuum pump outlet pipe (202), a return air pipe (208), and a return air pipe sealing assembly. The vacuum pump suction pipe (201) and the vacuum pump outlet pipe (202) are both installed in the box body (210). One end of the vacuum pump suction pipe (201) is connected to the bed connecting pipe, and the other end is connected to the vacuum pump (1). One end of the vacuum pump outlet pipe (202) is connected to the vacuum pump (1), and the other end is connected to the return air pipe (208). The end of the return air pipe (208) away from the vacuum pump outlet pipe (202) is connected to the vacuum pump suction pipe (201). The return air duct sealing assembly is used to control the opening and closing of the return air duct (208).

2. The cutting bed vacuum adsorption micro-blowing structure according to claim 1, characterized in that: An air outlet extension pipe (203) is provided at the end of the vacuum pump outlet pipe (202) away from the vacuum pump (1). The return air pipe (208) is connected to the air outlet extension pipe (203). The return air pipe sealing assembly is provided at the end of the air outlet extension pipe (203) away from the vacuum pump outlet pipe (202) and is used to control the opening and closing of the air outlet extension pipe (203).

3. The cutting bed vacuum adsorption micro-blowing structure according to claim 2, characterized in that: The return air duct sealing assembly includes a return air duct sealing cylinder (207), a return air duct sealing cylinder piston rod (205), a return air duct plug (204), and a cylinder fixing block (206). The return air duct sealing cylinder (207) is set at the end of the outlet extension pipe (203) away from the vacuum pump outlet pipe (202) via the cylinder fixing block (206). The return air duct sealing cylinder piston rod (205) is slidably set in the return air duct sealing cylinder (207), and the return air duct plug (204) is set on the return air duct sealing cylinder piston rod (205). The return air duct plug (204) can block the end of the outlet extension pipe (203) near the vacuum pump outlet pipe (202) under the movement of the return air duct sealing cylinder piston rod (205).

4. The cutting bed vacuum adsorption micro-blowing structure according to claim 1, characterized in that: The micro-blowing structure box (2) also includes a pressure relief valve assembly (209), which is installed on the vacuum pump suction pipe (201) and is used to relieve the pressure of the gas in the vacuum pump suction pipe (201).

5. The cutting bed vacuum adsorption micro-blowing structure according to claim 4, characterized in that: The cutting bed also includes a control system, which is connected to the return air duct sealing assembly and the pressure relief valve assembly (209) and is used to control the opening and closing of the return air duct sealing assembly and the pressure relief valve assembly (209).

6. The cutting bed vacuum adsorption micro-blowing structure according to claim 1, characterized in that: The micro-blowing structure box (2) also includes a silencer pipe, which includes a U-shaped pipe body (211) and a silencer outlet (212). The U-shaped pipe body (211) is installed in the box body (210). One end of the U-shaped pipe body (211) is connected to the vacuum pump outlet pipe (202), and the other end of the U-shaped pipe body (211) is connected to the atmosphere through the silencer outlet (212).

7. The cutting bed vacuum adsorption micro-blowing structure according to claim 6, characterized in that: The vacuum pump outlet pipe (202) and the vacuum pump suction pipe (201) are parallel to each other. The U-shaped pipe (211) is located above the vacuum pump suction pipe (201) and the vacuum pump outlet pipe (202), and the U-shaped pipe (211) and the vacuum pump suction pipe (201) are perpendicular to each other in space.

8. The cutting bed vacuum adsorption micro-blowing structure according to claim 1, characterized in that: The cutting bed is also provided with a vacuum pump placement box (101), the vacuum pump (1) is placed in the vacuum pump placement box (101), the vacuum pump placement box (101) is fixedly connected to the box body (210) of the micro-blowing structure box (2); heat dissipation holes (102) are opened on the outer peripheral surface of the vacuum pump placement box (101).

9. A control method for a cutting bed vacuum adsorption micro-blowing structure, employing the cutting bed vacuum adsorption micro-blowing structure according to any one of claims 1-8, wherein the cutting bed vacuum adsorption micro-blowing structure includes a control system, the control system being connected to a return air duct sealing assembly for controlling the opening and closing of the return air duct sealing assembly; characterized in that: The steps are as follows: S1: The control system closes the return air pipe (208) through the return air pipe sealing component, the vacuum pump (1) works, the vacuum pump (1) performs negative pressure adsorption on the cutting material on the cutting bed through the vacuum pump suction pipe (201) and the bed connecting pipe, the gas in the vacuum pump suction pipe (201) and the bed connecting pipe is discharged from the vacuum pump outlet pipe (202) through the transfer of the vacuum pump (1); the cutting blade on the cutting bed cuts the cutting material; S2: After the material cutting in step S1 is completed, the vacuum pump (1) continues to work. The control system opens the return air pipe (208) through the return air pipe sealing component. After the gas in the vacuum pump suction pipe (201) and the bed connecting pipe is transferred by the vacuum pump (1), part of it is discharged from the vacuum pump outlet pipe (202), and the other part enters the vacuum pump suction pipe (201) through the return air pipe (208) to realize the back blowing of the material.

10. The control method for the vacuum adsorption micro-blowing structure of the cutting bed according to claim 9, characterized in that: The micro-blowing structure box (2) also includes a pressure relief valve assembly (209), which is installed on the vacuum pump suction pipe (201). The control system is connected to the pressure relief valve assembly (209) to relieve the pressure of the gas in the vacuum pump suction pipe (201). In step S2, when the control system opens the return pipe (208) through the return pipe sealing assembly, the control system opens the pressure relief valve assembly (209), and the pressure relief valve assembly (209) relieves the pressure of the gas in the vacuum pump suction pipe (201).

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