Cover plate opening and closing feeding device for CNC machining

Abstract

The utility model discloses a CNC machining cover plate opening and closing feeding device which comprises a machine table, a carrier plate and a cover plate, the carrier plate and the cover plate are installed on the upper surface of the machine table, a supporting plate is arranged on the outer side of the long edge of the carrier plate, a push block is installed at the upper end of a piston rod of an opening and closing air cylinder, and one end of a rotating plate is rotationally connected with the push block through a pin shaft. At least one jacking air cylinder is arranged below the supporting plate, a connecting carrier plate is installed at the end, away from the pushing block, of the rotating plate, the clamping assembly is installed on the connecting carrier plate, a first extension part and a second extension part on the connecting carrier plate are each provided with a positioning through hole, and each positioning base is provided with a first positioning pin matched with the corresponding positioning through hole. While the cover plate is automatically taken and placed, the position precision of the cover plate in the process of repeatedly taking and placing the cover plate can be ensured, the pushing damage to a workpiece in the process of opening and closing the cover plate can be avoided, the position precision in the long-term use process can be ensured, and the taking and placing precision of the cover plate is improved.

Description

Technical Field

[0001] The utility model relates to a cover plate opening, closing and loading device for CNC machining, belonging to the field of CNC machining. Background Technique

[0002] CNC is also called a numerically controlled milling machine, which uses computer programming to control the feed speed of the tool, the spindle speed, and functions such as the tool changer and coolant. Usually, the workpiece to be processed is fixed on the machine tool using a corresponding fixture. In the prior art, during the processing, the cover plate of the fixture needs to be taken, placed, opened and closed repeatedly for a long time. However, it is difficult to ensure the position accuracy of the cover plate during repeated taking and placing, and it is easy to push the workpiece during the opening and closing process, causing damage to the workpiece, and it is difficult to ensure the position accuracy during long-term use, reducing the accuracy of taking and placing the cover plate. Content of the Utility Model

[0003] The purpose of the utility model is to provide a cover plate opening, closing and loading device for CNC machining. While realizing the automatic taking and placing of the cover plate, the cover plate opening, closing and loading device for CNC machining can not only ensure the position accuracy of the cover plate during the repeated taking and placing process, but also avoid the pushing damage to the workpiece during the opening and closing process of the cover plate, and can also ensure the position accuracy during long-term use, improving the accuracy of taking and placing the cover plate.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a cover plate opening, closing and loading device for CNC machining, used for workpiece machining, including: a machine table, a carrier plate and a cover plate installed on the upper surface of the machine table. When in the processing state, the main body part of the workpiece is placed between the carrier plate and the cover plate, and the lower surface of the workpiece is in contact with and fits on the upper surface of the carrier plate. A support plate is arranged below the machine table and outside the long side of the carrier plate. A opening and closing cylinder is fixedly installed on the lower surface of the horizontally arranged support plate. The upper end of the piston rod of the opening and closing cylinder is installed with a push block. A support seat is installed on the upper surface of the support plate and on the side of the piston rod of the opening and closing cylinder close to the carrier plate. One end of a rotating plate is rotatably connected to the push block through a pin shaft. A clamping component is installed at the other end of the rotating plate. The upper end of the support seat is rotatably installed with a connecting rod. The other end of the connecting rod connected to the support seat is connected to the rotating plate. A to-be-clamped part cooperating with the clamping component is arranged on the upper surface of the cover plate. When the piston rod of the opening and closing cylinder is in the extended state, the rotating plate is in a horizontal state and the connecting rod is in a vertical state, and the clamping component is located above the to-be-clamped part on the cover plate;

[0005] At least one lifting cylinder is arranged below the support plate. The piston rod of the lifting cylinder is connected to the lower surface of the support plate, so that the support plate can move in the vertical direction. A guiding support is installed on the upper surface of the support plate. The first side plate and the second side plate of the guiding support are respectively located on both sides of the rotating plate. A guiding groove for the pin shaft to be embedded is provided on each of the first side plate and the second side plate. A connecting carrier plate is installed at one end of the rotating plate far away from the pushing block. The clamping assembly is installed on the connecting carrier plate. The connecting carrier plate has a first extension part and a second extension part respectively extending to both sides of the clamping assembly. Positioning through holes are provided at the ends of the first extension part and the second extension part far away from the clamping assembly respectively. Positioning bases corresponding to the positioning through holes are respectively installed on the upper surface of the cover plate. A first positioning pin cooperating with the positioning through hole is provided on each positioning base.

[0006] The further improved solutions in the above technical solutions are as follows:

[0007] 1. In the above solution, the support plate and the machine table are connected by at least two groups of guide columns and guide sleeves in cooperation.

[0008] 2. In the above solution, the two guide sleeves are respectively installed at both ends of the support plate. One end of each of the two vertically arranged guide columns is connected to the machine table, and the other end is correspondingly embedded in the guide sleeve and slidably cooperates with the guide sleeve.

[0009] 3. In the above solution, a plurality of first through holes are provided on the main body part of the workpiece. A plurality of second positioning pins cooperating with the first through holes are installed on the upper surface of the carrier plate. When in the processing state, the second positioning pins correspondingly penetrate into the first through holes.

[0010] 4. In the above solution, at least one second through hole is provided on the main body part of the workpiece. A plurality of adsorption holes are provided on the upper surface of the carrier plate. The adsorption holes are communicated with a vacuum pump or a vacuum generator through a pipeline.

[0011] 5. In the above solution, a cavity is formed between the machine table and the carrier plate. The cavity is communicated with a vacuum pump or a vacuum generator installed on the machine table through a pipeline. The adsorption holes are communicated with the cavity through a pipeline provided on the carrier plate.

[0012] Due to the application of the above technical solutions, the present utility model has the following advantages compared with the prior art:

[0013] The cover opening, closing and loading device for CNC machining of the present utility model has a clamping assembly installed at the other end of the rotating plate. A connecting rod is rotatably installed at the upper end of the support base, and the other end of the connecting rod connected to the support base is connected to the rotating plate. A workpiece to be clamped that cooperates with the clamping assembly is arranged on the upper surface of the cover plate. When the piston rod of the opening and closing cylinder is in the extended state, the rotating plate is in a horizontal state and the connecting rod is in a vertical state. The clamping assembly is located above the workpiece to be clamped on the cover plate. At least one lifting cylinder is arranged below the support plate, and the piston rod of the lifting cylinder is connected to the lower surface of the support plate, so that the support plate can move in the vertical direction. A guiding support is installed on the upper surface of the support plate. The first side plate and the second side plate of the guiding support are respectively located on both sides of the rotating plate. A guiding groove for the shaft to be inserted is opened on both the first side plate and the second side plate. A connecting carrier plate is installed at the end of the rotating plate away from the push block, and the clamping assembly is installed on the connecting carrier plate. The connecting carrier plate has a first extension part and a second extension part that respectively extend to both sides of the clamping assembly. Positioning through holes are opened at the ends of the first extension part and the second extension part away from the clamping assembly respectively. Positioning bases corresponding to the positioning through holes are respectively installed on the upper surface of the cover plate. A first positioning pin that cooperates with the positioning through hole is arranged on each positioning base. While realizing the automatic picking and placing of the cover plate, it can not only ensure the position accuracy of the cover plate during the long-term repeated picking and placing process of the cover plate, thus ensuring the stability of the workpiece pressing, but also avoid the pushing damage to the workpiece during the opening and closing process of the cover plate. It can also perform positioning and calibration on the relative positions between the connecting carrier plate installed with the clamping assembly and the cover plate installed with the workpiece to be clamped multiple times during the long-term use process, ensuring the position accuracy between the clamping assembly and the workpiece to be clamped during the long-term use process, thereby improving the picking and placing accuracy of the cover plate. Description of the Drawings

[0014] Appendix Figure 1 is a schematic structural diagram of the cover opening, closing and loading device for CNC machining of the present utility model;

[0015] Appendix Figure 2 is Figure 1 an enlarged schematic diagram of part A in the appendix;

[0016] Appendix Figure 3 is a schematic diagram of the partial structure disassembly of the cover opening, closing and loading device for CNC machining of the present utility model;

[0017] Appendix Figure 4 is Figure 3 an enlarged schematic diagram of part B in the appendix;

[0018] Appendix Figure 5 is a schematic diagram of the partial structure of the cover opening, closing and loading device for CNC machining of the present utility model;

[0019] Appendix Figure 6 is Figure 5Schematic cross-sectional view;

[0020] Appendix Figure 7 Schematic structural view of a workpiece in the cover opening, closing and loading device for CNC machining of the present utility model;

[0021] Appendix Figure 8 Schematic structural view of a gas groove in the cover opening, closing and loading device for CNC machining of the present utility model.

[0022] In the above drawings: 100, workpiece; 101, main body part; 102, first through hole; 103, second through hole; 200, machine table; 201, cavity; 300, carrier plate; 301, adsorption hole; 400, cover plate; 401, part to be clamped; 500, cover plate; 501, gas groove; 700, clamping assembly; 1, support plate; 2, lifting cylinder; 3, opening and closing cylinder; 4, piston rod; 5, push block; 6, support seat; 7, rotating plate; 8, pin shaft; 9, connecting rod; 10, guiding support; 11, first side plate; 12, second side plate; 13, guiding groove; 14, second positioning pin; 161, guide post; 162, guide sleeve; 17, connecting carrier plate; 171, first extension part; 172, second extension part; 181, positioning through hole; 182, positioning base; 183, first positioning pin. Detailed implementation manners

[0023] The present patent can be further clearly understood through the following specific embodiments given, but they do not limit the present patent.

[0024] Embodiment 1: A cover opening and closing and loading device for CNC machining, used for machining workpiece 100, comprising: a machine table 200, a carrier plate 300 and a cover plate 400 installed on the upper surface of the machine table 200. When in the machining state, the main body 101 of the workpiece 100 is placed between the carrier plate 300 and the cover plate 400, and the lower surface of the workpiece 100 is in contact and fit with the upper surface of the carrier plate 300. Below the machine table 200 and outside the long side of the carrier plate 300, there is a support plate 1. A opening and closing cylinder 3 is fixedly installed on the lower surface of the horizontally arranged support plate 1. The upper end of the piston rod 4 of the opening and closing cylinder 3 is installed with a push block 5. On the upper surface of the support plate 1 and on the side of the piston rod 4 of the opening and closing cylinder 3 close to the carrier plate 300, there is a support seat 6. One end of a rotating plate 7 is rotatably connected to the push block 5 through a pin shaft 8. A clamping assembly 700 is installed at the other end of the rotating plate 7. The upper end of the support seat 6 is rotatably installed with a connecting rod 9. The other end of the connecting rod 9 connected to the support seat 6 is connected to the rotating plate 7. A to-be-clamped part 401 cooperating with the clamping assembly 700 is arranged on the upper surface of the cover plate 400. When the piston rod 4 of the opening and closing cylinder 3 is in the extended state, the rotating plate 7 is in the horizontal state and the connecting rod 9 is in the vertical state, and the clamping assembly 700 is located above the to-be-clamped part 401 on the cover plate 400;

[0025] At least one lifting cylinder 2 is arranged below the support plate 1. The piston rod of the lifting cylinder 2 is connected to the lower surface of the support plate 1, so that the support plate 1 can move in the vertical direction. A guiding support 10 is installed on the upper surface of the support plate 1. The first side plate 11 and the second side plate 12 of the guiding support 10 are respectively located on both sides of the rotating plate 7. A guiding groove 13 for the pin shaft 8 to be embedded is opened on both the first side plate 11 and the second side plate 12. A connecting carrier plate 17 is installed at the end of the rotating plate 7 far from the push block 5. The clamping assembly 700 is installed on the connecting carrier plate 17. The connecting carrier plate 17 has a first extension part 171 and a second extension part 172 respectively extending to both sides of the clamping assembly 700. Positioning through holes 181 are opened at the ends of the first extension part 171 and the second extension part 172 far from the clamping assembly 700 respectively. Positioning bases 182 corresponding to the positioning through holes 181 are respectively installed on the upper surface of the cover plate 400. A first positioning pin 183 cooperating with the positioning through hole 181 is arranged on each positioning base 182;

[0026] After machining is completed: First, the lifting cylinder drives the support plate to move up to the high position, and then the opening and closing cylinder drives the push block to move up to the high position, so that the rotating plate rotated as the push block moves up rotates to the horizontal, and the clamping assembly installed on the rotating plate rotates to above the to-be-clamped part on the cover plate accordingly; At this time, the connecting rod rotates to the vertical state, and the pin shaft moves to the upper end of the guiding groove;

[0027] Next, the support plate is driven to move downward by the lifting cylinder, and the opening and closing cylinder, the rotating plate, and the clamping assembly all move downward accordingly. The positioning pins on the positioning base on the upper surface of the cover plate correspondingly pass through the positioning through holes on the connecting carrier plate to ensure the position accuracy between the connecting carrier plate installed with the clamping assembly and the cover plate installed with the workpiece to be clamped.

[0028] After that, through the clamping cooperation between the clamping assembly and the workpiece to be clamped, stable clamping of the entire cover plate is achieved.

[0029] The above-mentioned support plate 1 and the machine table 200 are connected in cooperation through at least two groups of guide posts 161 and guide sleeves 162.

[0030] Two of the above-mentioned guide sleeves 162 are respectively installed at both ends of the support plate 1. One end of each of the two vertically arranged guide posts 161 is connected to the machine table 200, and the other end is correspondingly embedded in the guide sleeve 162 and slidably cooperates with the guide sleeve 162.

[0031] A plurality of first through holes 102 are provided on the main body portion 101 of the above-mentioned workpiece 100. A plurality of second positioning pins 14 that cooperate with the first through holes 102 are installed on the upper surface of the carrier plate 300. When in the processing state, the second positioning pins 14 correspondingly penetrate into the first through holes 102.

[0032] At least one second through hole 103 is provided on the main body portion 101 of the above-mentioned workpiece 100. A plurality of adsorption holes 301 are provided on the upper surface of the carrier plate 300. The adsorption holes 301 are communicated with a vacuum pump or a vacuum generator through a pipeline.

[0033] A cavity 201 is formed between the above-mentioned machine table 200 and the carrier plate 300. The cavity 201 is communicated with a vacuum pump or a vacuum generator installed on the machine table 200 through a pipeline. The adsorption holes 301 are communicated with the cavity 201 through a pipeline provided on the carrier plate 300;

[0034] The first through hole and the second through hole are both process through holes of the workpiece's own structure. The workpiece is specifically the A part or D part of a notebook computer.

[0035] Embodiment 2: A cover opening and closing and loading device for CNC machining, used for machining a workpiece 100, comprising: a machine table 200, a carrier plate 300 and a cover plate 400 mounted on the upper surface of the machine table 200. When in the machining state, the main body 101 of the workpiece 100 is placed between the carrier plate 300 and the cover plate 400, and the lower surface of the workpiece 100 is in contact and fit with the upper surface of the carrier plate 300. Below the machine table 200 and outside the long side of the carrier plate 300, there is a support plate 1 provided. A opening and closing cylinder 3 is fixedly mounted on the lower surface of the horizontally arranged support plate 1. The upper end of the piston rod 4 of the opening and closing cylinder 3 is mounted with a push block 5. On the upper surface of the support plate 1 and on the side of the piston rod 4 of the opening and closing cylinder 3 close to the carrier plate 300, there is a support seat 6. One end of a rotating plate 7 is rotatably connected to the push block 5 through a pin shaft 8. A clamping assembly 700 is mounted on the other end of the rotating plate 7. The upper end of the support seat 6 is rotatably mounted with a connecting rod 9. The other end of the connecting rod 9 connected to the support seat 6 is connected to the rotating plate 7. A to-be-clamped part 401 cooperating with the clamping assembly 700 is arranged on the upper surface of the cover plate 400. When the piston rod 4 of the opening and closing cylinder 3 is in the extended state, the rotating plate 7 is in the horizontal state and the connecting rod 9 is in the vertical state, and the clamping assembly 700 is located above the to-be-clamped part 401 on the cover plate 400;

[0036] When in the machining state: The workpiece to be machined is installed between the carrier plate and the cover plate, so that the lower surface of the main body of the workpiece is in contact with the upper surface of the carrier plate. Since the cover plate generally uses a metal part and has a relatively large self-weight, under the action of its own pressure, the surface contact between the main body of the workpiece and the carrier plate below it can be initially maintained;

[0037] At least one jacking cylinder 2 is arranged below the support plate 1. The piston rod of the jacking cylinder 2 is connected to the lower surface of the support plate 1, so that the support plate 1 can move in the vertical direction. A guiding support 10 is mounted on the upper surface of the support plate 1. The first side plate 11 and the second side plate 12 of the guiding support 10 are respectively located on both sides of the rotating plate 7. A guiding groove 13 for the pin shaft 8 to be embedded is opened on each of the first side plate 11 and the second side plate 12. A connecting carrier plate 17 is mounted on the end of the rotating plate 7 far from the push block 5. The clamping assembly 700 is mounted on the connecting carrier plate 17. The connecting carrier plate 17 has a first extension part 171 and a second extension part 172 respectively extending towards both sides of the clamping assembly 700. A positioning through hole 181 is opened at each end of the first extension part 171 and the second extension part 172 far from the clamping assembly 700. Positioning bases 182 corresponding to the positioning through holes 181 are respectively mounted on the upper surface of the cover plate 400. A first positioning pin 183 cooperating with the positioning through hole 181 is arranged on each positioning base 182;

[0038] The support plate is driven by the jacking cylinder to move upward to a high position, and the opening and closing cylinder, the rotating plate, the clamping assembly, and the cover plate clamped by the clamping assembly all move upward accordingly, so that the positioning holes on the cover plate are disengaged from the positioning posts on the machine table. At the same time, the elastic support plate installed on the cover plate is perpendicular to and away from the surface of the processed workpiece without damaging the workpiece.

[0039] The support plate 1 and the machine table 200 are connected by at least two groups of guide posts 161 and guide sleeves 162 in cooperation.

[0040] At least one second through hole 103 is provided on the main body portion 101 of the workpiece 100. A plurality of adsorption holes 301 are formed on the upper surface of the carrier plate 300. The adsorption holes 301 are communicated with a vacuum pump or a vacuum generator through pipelines.

[0041] The second through hole is a process through hole in the structure of the workpiece itself. The workpiece is specifically the A part or D part of a notebook computer.

[0042] A cavity 201 is formed between the machine table 200 and the carrier plate 300. The cavity 201 is communicated with a vacuum pump or a vacuum generator installed on the machine table 200 through a pipeline. The adsorption holes 301 are communicated with the cavity 201 through pipelines formed on the carrier plate 300.

[0043] By starting the vacuum pump or the vacuum generator, a gas flow path is generated from the gas grooves on the lower surface of the elastic support plate, the second through holes on the main body portion of the workpiece, the adsorption holes on the upper surface of the carrier plate to the vacuum pump or the vacuum generator, so as to generate an adsorption force on the elastic support plate above the workpiece, and further enhance the downward acting force of the cover plate fixedly connected to the elastic support plate and the pressing block installed on the cover plate, thereby realizing stable pressing of the main body portion of the workpiece, especially its peripheral edge.

[0044] Two of the above-mentioned jacking cylinders 2 are respectively arranged below both ends of the support plate 1.

[0045] An elastic support plate 500 is installed on the lower surface of the cover plate 400 and can be in contact with the upper surface of the workpiece 100. A plurality of gas grooves 501 are formed on the lower surface of the elastic support plate 500.

[0046] When in the processing state: the workpiece to be processed is installed between the carrier plate and the cover plate, so that the lower surface of the main body portion of the workpiece is in contact with the upper surface of the carrier plate, and the upper surface is in contact with the lower surface of the elastic support plate. Since the cover plate is generally made of a metal part and has a large self-weight, under the action of its own pressure, the main body portion of the workpiece can be initially kept in surface contact with the elastic support plate and the carrier plate above and below it.

[0047] Next, by starting a vacuum pump or a vacuum generator, a gas flow path is generated from the gas groove on the lower surface of the elastic support plate, the second through hole on the workpiece main body, and the adsorption holes on the upper surface of the carrier plate to the vacuum pump or the vacuum generator, thereby generating an adsorption force on the elastic support plate above the workpiece, and further enhancing the downward acting force of the cover plate fixedly connected to the elastic support plate and the pressing block mounted on the cover plate, so as to achieve stable pressing of the workpiece main body, especially at its peripheral edges;

[0048] When the processing is completed: First, the lifting cylinder is driven to move the support plate upward to a high position, and then the opening and closing cylinder is driven to move the push block upward to a high position, so that the rotating plate that rotates as the push block moves upward rotates to a horizontal position, and the clamping assembly mounted on the rotating plate rotates to above the workpiece to be clamped on the cover plate; At this time, the connecting rod rotates to a vertical state, and the pin shaft moves to the upper end of the guide groove;

[0049] Next, the lifting cylinder is driven to move the support plate downward, and the opening and closing cylinder, the rotating plate, and the clamping assembly all move downward accordingly. The positioning pins on the positioning base on the upper surface of the cover plate correspondingly pass through the positioning through holes on the connecting carrier plate to ensure the position accuracy between the connecting carrier plate equipped with the clamping assembly and the cover plate equipped with the workpiece to be clamped;

[0050] After that, through the clamping cooperation between the clamping assembly and the workpiece to be clamped, stable clamping of the entire cover plate is achieved. Here, the clamping assembly and the workpiece to be clamped are not the invention points of this patent. Specifically, they can be obtained through outsourcing, or the solution in the applicant's prior application (application number 2024102325213) can be adopted, which will not be elaborated here;

[0051] The vacuum pump or the vacuum generator is turned off, and the lifting cylinder is driven again to move the support plate upward to a high position. The opening and closing cylinder, the rotating plate, the clamping assembly, and the cover plate clamped by the clamping assembly all move upward accordingly, so that the positioning holes on the cover plate are separated from the positioning posts on the machine table, and at the same time, the elastic support plate mounted on the cover plate is vertically separated from the surface of the processed workpiece without damaging the workpiece;

[0052] Then, the processed workpiece on the carrier plate is taken away manually or by an automated device, and a new workpiece to be processed is placed on the carrier plate;

[0053] The piston rod of the lifting cylinder is placed in an extended state, and at the same time, the opening and closing cylinder drives the push block to move upward to a high position, so that the rotating plate that rotates as the push block moves upward and the cover plate clamped by the clamping assembly on the rotating plate both rotate from the 90° position to the horizontal position;

[0054] The support plate is driven by the lifting cylinder to move downward, and the opening and closing cylinder, the rotating plate, the clamping assembly, and the cover plate clamped by the clamping assembly on the rotating plate all move downward until the elastic support plate on the lower surface of the cover plate contacts the upper surface of the main body of the workpiece to be processed, and the positioning posts on the machine table pass through the positioning holes on the cover plate to ensure the position accuracy of the cover plate;

[0055] After that, the clamping assembly releases the workpiece to be clamped, and the support plate is driven by the lifting cylinder to move upward to a high position again. The opening and closing cylinder, the rotating plate, and the clamping assembly all move upward to disengage from the cover plate. Then, the push block is driven by the opening and closing cylinder to move downward to a low position.

[0056] When using the above-mentioned cover plate opening and closing loading and unloading device for CNC machining, while realizing the automatic picking and placing of the cover plate, it can not only ensure the position accuracy of the cover plate during the long-term repeated picking and placing process of the cover plate, thus ensuring the stability of the pressing of the workpiece, but also avoid the pushing damage to the workpiece during the opening and closing process of the cover plate. It can also perform positioning calibration on the relative positions between the connecting carrier plate installed with the clamping assembly and the cover plate installed with the workpiece to be clamped multiple times during long-term use, ensuring the position accuracy between the clamping assembly and the workpiece to be clamped during long-term use, thereby improving the picking and placing accuracy of the cover plate.

[0057] The above embodiments are only for explaining the technical concept and characteristics of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and should not be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A CNC machined cover plate opening and closing feeding device for machining a workpiece (100), comprising: A machine table (200), a carrier plate (300) and a cover plate (400) mounted on the upper surface of the machine table (200); when in a processing state, the main body (101) of the workpiece (100) is placed between the carrier plate (300) and the cover plate (400), and the lower surface of the workpiece (100) is in contact with and fits with the upper surface of the carrier plate (300), characterized in that: a support plate (1) is provided below the machine table (200) and outside the long side of the carrier plate (300); an opening and closing cylinder (3) is fixedly mounted on the lower surface of the horizontally arranged support plate (1); a push block (5) is mounted on the upper end of the piston rod (4) of the opening and closing cylinder (3); and the upper surface of the support plate (1) and the piston rod (4) of the opening and closing cylinder (3) are close to the carrier plate (300). A support seat (6) is installed on one side, one end of a rotating plate (7) is rotatably connected to the push block (5) through a pin shaft (8), a clamping assembly (700) is installed on the other end of the rotating plate (7), a connecting rod (9) is rotatably installed on the upper end of the support seat (6), one end of the connecting rod (9) is connected to the support seat (6), and the other end of the connecting rod (9) is connected to the rotating plate (7), and a to-be-clamped part (401) cooperating with the clamping assembly (700) is provided on the upper surface of the cover plate (400), when the piston rod (4) of the opening and closing cylinder (3) is in an extended state, the rotating plate (7) is in a horizontal state and the connecting rod (9) is in a vertical state, and the clamping assembly (700) is located above the to-be-clamped part (401) on the cover plate (400); At least one lifting cylinder (2) is arranged below the support plate (1), and the piston rod of the lifting cylinder (2) is connected to the lower surface of the support plate (1), so that the support plate (1) can move in the vertical direction. A guide support (10) is installed on the upper surface of the support plate (1). The first side plate (11) and the second side plate (12) of the guide support (10) are respectively located on both sides of the rotating plate (7). The first side plate (11) and the second side plate (12) are each provided with a guide groove (13) for the pin shaft (8) to be embedded. A connecting carrier plate (17) is installed on the end of the rotating plate (7) away from the push block (5). The clamping assembly (700) is mounted on the connecting carrier (17), and the connecting carrier (17) has a first extension portion (171) and a second extension portion (172) extending toward two sides of the clamping assembly (700) respectively. The first extension portion (171) and the second extension portion (172) are each provided with a positioning through hole (181) at one end away from the clamping assembly (700). Positioning bases (182) corresponding to the positioning through holes (181) are respectively mounted on the upper surface of the cover plate (400), and each of the positioning bases (182) is provided with a first positioning pin (183) matched with the positioning through hole (181).

2. The CNC-processed cover plate opening and closing feeding device according to claim 1, characterized in that: The support plate (1) and the machine platform (200) are connected by means of at least two groups of guide pillars (161) and guide sleeves (162).

3. The CNC machined cover plate opening and closing feeding device according to claim 2, characterized in that: The two guide sleeves (162) are respectively mounted on the two ends of the support plate (1); one end of each of the two vertically arranged guide pillars (161) is connected to the machine table (200), and the other end is correspondingly embedded in the guide sleeve (162) and slidably matched with the guide sleeve (162).

4. The CNC machined cover plate opening and closing feeding device according to claim 1, characterized in that: A plurality of first through holes (102) are arranged on the main body (101) of the workpiece (100), and a plurality of second positioning pins (14) cooperating with the first through holes (102) are mounted on the upper surface of the carrier plate (300); when in a processing state, the second positioning pins (14) correspondingly penetrate into the first through holes (102).

5. The CNC machined cover plate opening and closing feeding device according to claim 1, characterized in that: At least one second through hole (103) is provided on the main body (101) of the workpiece (100), and a plurality of adsorption holes (301) are provided on the upper surface of the carrier plate (300), wherein the adsorption holes (301) are connected to a vacuum pump or a vacuum generator through pipelines.

6. The CNC-processed cover plate opening and closing feeding device according to claim 5, characterized in that: A cavity (201) is formed between the machine platform (200) and the carrier plate (300); the cavity (201) is connected to a vacuum pump or a vacuum generator installed on the machine platform (200) through a pipeline; and the adsorption hole (301) is connected to the cavity (201) through a pipeline opened on the carrier plate (300).

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