Precision machining device for notebook cover body

Abstract

The utility model discloses a precision machining device for a notebook computer cover body, which is used for workpiece machining and comprises a machine table, a carrier plate and a cover plate, the carrier plate and the cover plate are arranged on the upper surface of the machine table, a supporting plate is arranged below the machine table and located on the outer side of the long edge of the carrier plate, and a plurality of pressing blocks which are sequentially arranged along the peripheral edge of the cover plate are arranged on the lower surface of the cover plate. A guide support is installed on the upper surface of the supporting plate, a first side plate and a second side plate of the guide support are each provided with a guide groove allowing the pin shaft to be embedded therein, each guide groove comprises a first guide part extending in the vertical direction and a second guide part extending in an inclined mode, and a strip-shaped hole allowing the pin shaft to penetrate through is formed in the push block. While the cover plate is automatically taken and placed, the condition that the quality of a machining surface is influenced by cutter vibration and the like in the milling process can be avoided, the machining quality is improved, interference of a rotating structure to milling can be avoided, one-time continuous machining on the periphery of a workpiece is facilitated, and the machining efficiency, convenience and consistency are improved.

Description

Technical Field

[0001] The utility model relates to a precision machining device for a notebook cover body, belonging to the field of precision machining. Background Art

[0002] CNC, also known as a numerically controlled milling machine, 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 machined is fixed on the machine tool using a corresponding jig. In the prior art, during the machining process, the cover plate of the jig needs to be taken, placed, opened, and closed repeatedly for a long time. During the milling process, when the clamping force on the workpiece is insufficient, situations such as chatter marks that affect the quality of the machined surface are likely to occur, reducing the machining quality. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a precision machining device for a notebook cover body, which can avoid situations such as chatter marks that affect the quality of the machined surface during the milling process while realizing the automatic picking and placing of the cover plate, thereby improving the machining quality.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a precision machining device for a notebook cover body, used for machining workpieces, comprising: a machine table, a carrier plate and a cover plate installed on the upper surface of the machine table. When in the machining state, the main body 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 clamping cylinder is fixedly installed on the lower surface of the horizontally arranged support plate. The upper end of the piston rod of the clamping 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 clamping 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 assembly 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 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 clamping 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 assembly is located above the workpiece to be clamped on the cover plate.

[0005] A number of pressing blocks are installed on the lower surface of the cover plate and arranged in sequence along its four peripheral edges. When in the processing state, the lower surface of the pressing block is in extrusion contact with the four sides of the workpiece main body, and the edge parts around the workpiece are located outside the pressing blocks. 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 opened on both the first side plate and the second side plate. The guiding groove includes a first guiding part extending in the vertical direction and a second guiding part extending obliquely. The lower end of the second guiding part connected to the lower end of the first guiding part extends towards the direction close to the carrier plate. A strip-shaped hole for the pin shaft to pass through is opened on the pushing block. When the piston rod of the opening and closing air cylinder is in the extended state, the pin shaft is located at the end of the strip-shaped hole extending horizontally and away from the carrier plate. When the piston rod of the opening and closing air cylinder is in the contracted state, the pin shaft moving to the lower end of the second guiding part of the guiding groove is located at the end of the strip-shaped hole close to the carrier plate.

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

[0007] 1. In the above solution, the lower surface of the pressing block is set as an arc surface matching the upper surface of the workpiece main body.

[0008] 2. In the above solution, a number of first through holes are provided on the main body part of the workpiece, and a number of positioning pins matching the first through holes are installed on the upper surface of the carrier plate. When in the processing state, the positioning pins correspondingly penetrate into the first through holes.

[0009] 3. In the above solution, at least one second through hole is provided on the main body part of the workpiece, a number of adsorption holes are opened on the upper surface of the carrier plate, and the adsorption holes are communicated with a vacuum pump or a vacuum generator through pipelines.

[0010] 4. In the above solution, an elastic support plate is installed on the lower surface of the cover plate, which can be in contact with the upper surface of the workpiece. A number of gas grooves are opened on the lower surface of the elastic support plate.

[0011] 5. In the above solution, a number of the pressing blocks are arranged around the elastic support plate.

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

[0013] Precision machining device for the notebook cover of the present utility model. A clamping assembly is installed at the other end of the rotating plate. A connecting rod is rotatably installed at the upper end of the support base. The other end of the connecting rod connected to one end of the support base is connected to the rotating plate. A workpiece to be clamped that cooperates with the clamping assembly is provided 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. A plurality of pressing blocks are installed on the lower surface of the cover plate and arranged in sequence along its four peripheries. When in the machining state, the lower surface of the pressing block is in pressing contact with the four peripheries of the workpiece main body. The edge portions around the workpiece are located outside the pressing blocks. 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 inserted is provided on both the first side plate and the second side plate. The guiding groove includes a first guiding portion extending in the vertical direction and a second guiding portion extending obliquely. The lower end of the second guiding portion connected to the lower end of the first guiding portion extends towards the direction close to the carrier plate. A strip-shaped hole for the pin shaft to pass through is provided on the pushing block. When the piston rod of the opening and closing cylinder is in the extended state, the pin shaft is located at the end of the strip-shaped hole extending horizontally and away from the carrier plate. When the piston rod of the opening and closing cylinder is in the contracted state, the pin shaft moved to the lower end of the second guiding portion of the guiding groove is located at the end of the strip-shaped hole close to the carrier plate. While realizing the automatic picking and placing of the cover plate, it is possible to improve the pressing stability of the workpiece, especially in the processing area near the four peripheries, avoid situations such as vibration of the cutting tool during the milling process that affect the quality of the processed surface, improve the processing quality, and also avoid the interference of the rotating structure on the entire processing process, especially on the milling process of the workpiece, facilitate the one-time continuous processing of the four peripheries of the workpiece, and improve the processing efficiency, convenience and consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG Figure 1 is a schematic structural diagram of the precision machining device for the notebook cover of the present utility model;

[0015] FIG Figure 2 is Figure 1 an enlarged schematic view of part A in FIG;

[0016] FIG Figure 3 is a schematic diagram of the partial structure disassembly of the precision machining device for the notebook cover of the present utility model;

[0017] FIG Figure 4 is Figure 3 an enlarged schematic view of part B in FIG;

[0018] FIG Figure 5 is a partial structural schematic diagram of the precision machining device for the notebook cover of the present utility model;

[0019] FIG Figure 6 is Figure 5 a schematic sectional view of FIG;

[0020] Attached Figure 7 This is a schematic diagram of the open state of the cover plate of the precision machining device for the notebook cover body of the present utility model.

[0021] In the above drawings: 100, workpiece; 101, main body part; 102, first through hole; 103, second through hole; 104, edge part; 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; 600, pressing block; 700, clamping assembly; 1, support plate; 2, positioning pin; 3, opening and closing cylinder; 4, piston rod; 5, pushing 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; 131, first guiding part; 132, second guiding part; 14, strip-shaped hole. Specific embodiments

[0022] The present patent can be further clearly understood through the following specific embodiments given, but they do not limit the present patent.

[0023] Embodiment 1: A precision machining device for a notebook cover body, used for machining the workpiece 100, including: a machine table 200, a carrier plate 300 installed on the upper surface of the machine table 200, and a cover plate 400. When in the machining state, the main body part 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. A support plate 1 is arranged below the machine table 200 and outside the long side of the carrier plate 300. An 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 pushing block 5. A support seat 6 is installed 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. One end of a rotating plate 7 is rotatably connected to the pushing 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 part to be clamped 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 part to be clamped 401 on the cover plate 400;

[0024] A plurality of pressing blocks 600 are installed on the lower surface of the cover plate 400 and arranged in sequence along its four peripheral edges. When in the processing state, the lower surface of the pressing block 600 is in pressing contact with the four peripheries of the main body portion 101 of the workpiece 100, and the edge portions 104 around the workpiece 100 are located outside the pressing block 600. 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 inserted is provided on both the first side plate 11 and the second side plate 12. The guiding groove 13 includes a first guiding portion 131 extending in the vertical direction and a second guiding portion 132 extending obliquely. The lower end of the second guiding portion 132 connected to the upper end of the first guiding portion 131 extends towards the direction close to the carrier plate 300. A strip-shaped hole 14 for the pin shaft 8 to pass through is provided on the pushing block 5. When the piston rod 4 of the opening and closing cylinder 3 is in the extended state, the pin shaft 8 is located at the end of the strip-shaped hole 14 extending horizontally and away from the carrier plate 300. When the piston rod 4 of the opening and closing cylinder 3 is in the contracted state, the pin shaft 8 moving to the lower end of the second guiding portion 132 of the guiding groove 13 is located at the end of the strip-shaped hole 14 close to the carrier plate 300;

[0025] The edge portions around the workpiece are subjected to full circumferential milling processing by a CNC tool. And during the processing, since the pressure applied by the pressing block is close to the processing area, the occurrence of tool chatter and other situations can be effectively avoided, ensuring the quality and yield of the processed surface;

[0026] The pushing block is driven by the opening and closing cylinder to move down to the low position. During this process, the pin shaft first moves vertically downward along the first guiding portion of the guiding groove. The rotating plate rotatably connected to the pushing block by the pin shaft rotates from the horizontal position to the vertical (90°) position accordingly, and at the same time, the clamped cover plate is also driven to rotate from the horizontal position to the vertical position; under the action of the downward pulling force of the pushing block, the pin shaft continues to move downward and enters into the second guiding portion of the guiding groove, and moves along the obliquely arranged second guiding portion to the lower end of the second guiding portion. During this process, the pin shaft also moves from one end close to the carrier plate to the other end in the strip-shaped hole on the pushing block, and the rotating plate continues to rotate outward along with the movement of the pin shaft, and the cover plate also continues to rotate outward to the 110° position.

[0027] The lower surface of the above-mentioned pressing block 600 is set to be an arc surface matching the upper surface of the main body portion 101 of the workpiece 100.

[0028] 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 generator through pipelines.

[0029] The first through hole is a process through hole existing in the structure of the workpiece itself. The workpiece is specifically the A part or D part of a notebook computer

[0030] 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 generator installed on the machine table 200 through a pipeline, and the adsorption holes 301 are communicated with the cavity 201 through pipelines opened on the carrier plate 300.

[0031] The above-mentioned several pressing blocks 600 are arranged around the elastic support plate 500.

[0032] An elastic support plate 500 is installed on the lower surface of the above-mentioned cover plate 400, which can be in contact with the upper surface of the workpiece 100. A plurality of gas grooves 501 are opened on the lower surface of the elastic support plate 500.

[0033] Embodiment 2: A precision machining device for a notebook cover body, used for machining the workpiece 100, including: 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 portion 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 on the upper surface of the carrier plate 300. A support plate 1 is arranged below the machine table 200 and outside the long side of the carrier plate 300. A switching 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 switching cylinder 3 is installed with a pushing block 5. A support seat 6 is installed on the upper surface of the support plate 1 and on the side of the piston rod 4 of the switching cylinder 3 close to the carrier plate 300. One end of a rotating plate 7 is rotatably connected to the pushing 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 workpiece to be clamped 401 is arranged on the upper surface of the cover plate 400 and cooperates with the clamping assembly 700. When the piston rod 4 of the switching cylinder 3 is in the 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 workpiece to be clamped 401 on the cover plate 400;

[0034] A plurality of pressing blocks 600 are mounted on the lower surface of the cover plate 400 and are arranged in sequence along the edges thereof. When in the processing state, the lower surface of the pressing block 600 is in extrusion contact with the four sides of the main body 101 of the workpiece 100. The edge portions 104 around the workpiece 100 are located on the outside of the pressing block 600. A guide 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 guide support 10 are respectively located on both sides of the rotating plate 7. A guide groove 13 for the pin shaft 8 to be embedded is provided on the first side plate 11 and the second side plate 12. The guide groove 13 includes a groove extending in the vertical direction. The first guide portion 131 extends and the second guide portion 132 extends obliquely, the lower end of the second guide portion 132 connected to the lower end of the first guide portion 131 at its upper end extends toward the direction close to the carrier plate 300, and the push block 5 is provided with a strip hole 14 for the pin 8 to pass through. When the piston rod 4 of the opening and closing cylinder 3 is in an extended state, the pin 8 is located at the end of the horizontally extending strip hole 14 away from the carrier plate 300. When the piston rod 4 of the opening and closing cylinder 3 is in a retracted state, the pin 8 moved to the lower end of the second guide portion 132 of the guide groove 13 is located at the end of the strip hole 14 close to the carrier plate 300;

[0035] 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 workpiece body contacts the upper surface of the carrier plate, and the lower surface of the pressure block installed around the lower surface of the cover plate contacts the upper surface of the workpiece body. Since the cover plate is generally made of metal and has a large weight, the surface contact between the workpiece body and the pressure block and the carrier plate can be initially maintained under the action of the cover plate's own pressure;

[0036] The opening and closing cylinder drives the push block to move up to the high position, so that the rotating plate rotates as the push block moves up, and the cover plate clamped by the clamping assembly on the rotating plate rotates from the 110° position to the 90° position and then to the horizontal position;

[0037] Afterwards, the clamping assembly releases the workpiece to be clamped, and the supporting plate is driven to move up to a high position again by the lifting cylinder. The opening and closing cylinder, the rotating plate, and the clamping assembly are all moved up and separated from the cover plate. Then, the push block is driven down to a low position by the opening and closing cylinder. During this process, the rotating plate is rotated from the horizontal position to a 110° position again, thereby moving away from the workpiece to be processed, making it easier for the CNC tool to perform one-time processing on all four sides of the workpiece to be processed, thereby improving processing efficiency and convenience.

[0038] The main body 101 of the workpiece 100 is provided with a plurality of first through holes 102 , and the upper surface of the carrier plate 300 is provided with a plurality of positioning pins 2 that cooperate with the first through holes 102 . When in the processing state, the positioning pins 2 correspondingly penetrate into the first through holes 102 .

[0039] At least one second through hole 103 is provided on the main body 101 of the workpiece 100. A plurality of suction holes 301 are formed on the upper surface of the carrier plate 300, and the suction holes 301 are communicated with a vacuum pump through pipelines.

[0040] 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.

[0041] A cavity 201 is formed between the machine table 200 and the carrier plate 300. The cavity 201 is communicated with a vacuum pump installed on the machine table 200 through a pipeline, and the suction holes 301 are communicated with the cavity 201 through pipelines formed on the carrier plate 300.

[0042] The plurality of pressing blocks 600 are arranged around the elastic support plate 500.

[0043] The pressing block 600 is a urethane rubber pressing block.

[0044] 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.

[0045] Start the vacuum pump to generate a gas flow path from the gas grooves on the lower surface of the elastic support plate, the second through holes on the main body of the workpiece, the suction holes on the upper surface of the carrier plate to the vacuum pump or 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 blocks installed on the cover plate, thereby realizing stable pressing on the main body of the workpiece, especially its peripheral edges.

[0046] The working principle of the present utility model is as follows:

[0047] When in the processing state: Install the workpiece to be processed 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, the upper surface is in contact with the lower surface of the elastic support plate, and the lower surfaces of the pressing blocks installed around the lower surface of the cover plate are in contact with the upper surfaces of the four peripheries of the main body of the workpiece.

[0048] Since the cover plate is generally made of metal parts and has a relatively large self-weight, under the action of its own pressure, the cover plate can initially maintain surface contact between the main body of the workpiece and the elastic support plates, pressing blocks, and carrier plates above and below it. Then, by starting a vacuum pump or a 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 of the workpiece, 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 blocks mounted on the cover plate, so as to achieve stable pressing of the main body of the workpiece, especially at its peripheral edges.

[0049] Then, a CNC tool is used to perform full-circumferential milling on the edge parts around the workpiece. During the machining process, since the pressure applied by the pressing block is close to the machining area, the occurrence of tool chatter and other situations can be effectively avoided, ensuring the quality and yield of the machining surface.

[0050] When the machining is completed: First, 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 rotates to the 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 the vertical state, and the pin shaft moves to the upper end of the first guiding part of the guiding groove and the end of the strip-shaped hole on the push block far from the carrier plate.

[0051] Then, 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.

[0052] The vacuum pump or the vacuum generator is turned off, and the opening and closing cylinder is used to drive the push block to move downward to a low position again. During this process, the pin shaft first moves vertically downward along the first guiding part of the guiding groove. The rotating plate rotatably connected to the push block by the pin shaft rotates from the horizontal position to the vertical (90°) position, and at the same time drives the clamped cover plate to rotate from the horizontal position to the vertical position. Under the downward pulling force of the push block, the pin shaft continues to move downward into the second guiding part of the guiding groove and moves along the inclined second guiding part to the lower end of the second guiding part. During this process, the pin shaft also moves from the end close to the carrier plate to the other end in the strip-shaped hole on the push block, and the rotating plate continues to rotate outward with the movement of the pin shaft, and the cover plate also continues to rotate outward to the 110° position.

[0053] Then, through manual or automated equipment, the machined workpiece on the carrier plate is taken away, and a new workpiece to be machined is placed on the carrier plate.

[0054] The opening and closing cylinder drives the push block to move up to the high position, so that the rotating plate rotates as the push block moves up, and the cover plate clamped by the clamping assembly on the rotating plate rotates from the 110° position to the 90° position and then to the horizontal position;

[0055] Afterwards, the clamping assembly releases the workpiece to be clamped, and the supporting plate is driven to move up to a high position again by the lifting cylinder. The opening and closing cylinder, the rotating plate, and the clamping assembly are all moved up and separated from the cover plate. Then, the push block is driven down to a low position by the opening and closing cylinder. During this process, the rotating plate is rotated from the horizontal position to a 110° position again, thereby moving away from the workpiece to be processed, making it easier for the CNC tool to perform one-time processing on all four sides of the workpiece to be processed, thereby improving processing efficiency and convenience.

[0056] When the above-mentioned precision processing device of the notebook cover is used, it can realize automatic picking and placing of the cover while improving the stability of the pressure on the workpiece, especially the surrounding processing areas, avoiding vibration of the tool during milling and other situations that affect the quality of the processed surface, thereby improving the processing quality. It can also avoid the interference of the rotating structure on the entire processing process, especially the milling process of the workpiece, and facilitate one-time continuous processing of the four sides of the workpiece, thereby improving the efficiency, convenience and consistency of processing.

[0057] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to be included in the scope of protection of the present invention.

Claims

1. A precision machining device for a notebook cover body, used for machining a workpiece (100), comprising: A machine tool (200), a carrier plate (300) and a cover plate (400) mounted on the upper surface of the machine tool (200). When in the processing state, the main body portion (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 on the upper surface of the carrier plate (300). It is characterized in that: A support plate (1) is provided below the machine tool (200) and outside the long side of the carrier plate (300). A clamping 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 clamping cylinder (3) is installed with a push block (5). A support seat (6) is installed on the upper surface of the support plate (1) and on the side of the piston rod (4) of the clamping cylinder (3) close to the carrier plate (300). 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) with one end connected to the support seat (6) is connected to the rotating plate (7). A workpiece to be clamped (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 clamping 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 workpiece to be clamped (401) on the cover plate (400); A plurality of pressing blocks (600) are arranged in sequence along the four edges on the lower surface of the cover plate (400). When in the processing state, the lower surface of the pressing block (600) is in pressing contact with the periphery of the main body part (101) of the workpiece (100), and the edge parts (104) around the workpiece (100) are located outside the pressing block (600). 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 formed on both the first side plate (11) and the second side plate (12). The guiding groove (13) includes a first guiding part (131) extending in the vertical direction and a second guiding part (132) extending obliquely. The lower end of the second guiding part (132) whose upper end is connected to the lower end of the first guiding part (131) extends towards the direction close to the carrier plate (300). A strip-shaped hole (14) for the pin shaft (8) to pass through is formed on the pushing block (5). When the piston rod (4) of the opening and closing cylinder (3) is in the extended state, the pin shaft (8) is located at one end of the strip-shaped hole (14) extending horizontally and away from the carrier plate (300). When the piston rod (4) of the opening and closing cylinder (3) is in the contracted state, the pin shaft (8) moving to the lower end of the second guiding part (132) of the guiding groove (13) is located at one end of the strip-shaped hole (14) close to the carrier plate (300).

2. The precision machining device for the notebook cover body according to claim 1, characterized in that: The lower surface of the pressing block (600) is set as an arc surface matching the upper surface of the main body part (101) of the workpiece (100).

3. The precision machining device for the notebook cover according to claim 1, wherein: A plurality of first through holes (102) are formed on the main body part (101) of the workpiece (100). A plurality of positioning pins (2) cooperating with the first through holes (102) are installed on the upper surface of the carrier plate (300). When in the processing state, the positioning pins (2) correspondingly penetrate into the first through holes (102).

4. The precision machining device for the notebook cover according to claim 1, wherein: 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).

5. The precision machining device for the notebook cover body according to claim 4, characterized in that: A plurality of the pressing blocks (600) are arranged around the elastic support plate (500).

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