An automatic processing method for composite material circular cover plates

Abstract

This invention relates to an automated machining method for circular composite material covers, belonging to the field of functional composite material machining. By identifying the fiber direction through photography and combining it with C-axis positioning at the turning center, the method achieves automated machining of composite materials according to the fiber direction. Integrating an image-based dimensional measuring instrument into the production line enables rapid online full-size inspection. By using a machine tool's internal probe to pre-determine product dimensions and automatically compensate, the method automates first-piece debugging during frequent production changes. Controlling cutting forces through process methods, and precisely controlling clamping forces with small-diameter hydraulic cylinders and gauges, effectively controls the deformation of thin-walled parts. By modifying the chip conveyor to remove large particles and fibers, using multi-stage sedimentation to remove suspended particles, and employing a belt degreaser to remove lubricating oil, the method solves the problem of ensuring the composite material coolant meets emission standards. The process is automated and cost-effective.

Description

Technical Field

[0001] This invention belongs to the field of functional composite material machining, and relates to an automatic machining method for composite material circular cover plates. Background Technology

[0002] Quartz fiber reinforced silica composite materials have wide applications in the aerospace field. However, the cover plates are difficult to automate due to their structure and material properties. Quartz fiber reinforced silica circular cover plates (hereinafter referred to as "cover plates") are generally circular, thin-walled, box-shaped structures with flanged edges at the bottom and irregularly shaped surfaces at the top. The flanged edges have marking holes and connecting holes, and the fiber direction corresponds to the shape and holes. These workpieces are typically machined using a lathe to create the circular features, and the holes and shapes are machined by a machining center. The thin walls and low elastic modulus of the material make clamping deformation during machining prone to causing dimensional deviations. The top shape and holes correspond to the fiber weaving direction, requiring manual visual identification of the fiber direction and clamping according to the requirements before processing. The deionized cooling water used in processing is used only once and then discharged; before discharge, powder and oil must be removed to meet environmental protection requirements. According to aerospace product requirements, all products must undergo full-dimensional inspection and record the dimensional values. These characteristics result in numerous process turnovers, poor stability, and significant difficulty in automating manual operations. Publicly available information on related technologies is scarce. Summary of the Invention

[0003] The technical problem solved by this invention is to overcome the shortcomings of the prior art and propose an automatic processing method for circular cover plates made of composite materials. This method can meet the special needs of fiber orientation identification, wastewater treatment, deformation control, and dimensional detection automation in the automatic processing of quartz fiber reinforced silica cover plates, and can operate efficiently and reliably.

[0004] The solution of the present invention is:

[0005] An automated processing method for a circular composite material cover plate includes:

[0006] An automated machining system for producing circular composite material covers; the automated machining system includes a turnover station, a first turning center, a first chip conveyor, an image size measuring instrument, a control system, a first multi-stage settling tank, a first oil-water separator, a first in-machine probe, a hopper, a second multi-stage settling tank, a second chip conveyor, a second oil-water separator, a second in-machine probe, a second turning center, a robotic arm, a first high-precision hydraulic gauge, a second high-precision hydraulic gauge, a first gripper, a second gripper, an industrial camera, a first baffle, a second baffle, a third baffle, a water outlet, a water inlet, a first-stage water tank, a second-stage water tank, a third-stage water tank, a fourth-stage water tank, a fifth-stage water tank, a fourth baffle, a water pump, and a three-jaw hydraulic cylinder;

[0007] The pallet is pulled out of the hopper by a robotic arm and installed onto the three-jaw chuck of the second turning center.

[0008] An industrial camera takes a picture; the control system identifies the fiber direction through image analysis, calculates the angle between the fiber direction and the current clamping direction, and sends the angle compensation value to the second turning center; the second turning center begins to process the concave surface and the end face.

[0009] The first piece is machined with a 0.5mm allowance; after the second machine's internal probe detects the dimensions, it is compared with the preset value, and the difference is compensated to the second turning center;

[0010] After machining, the coolant nozzles in the second turning center clean the workpiece debris, and the spindle rotates at high speed to dry the cutting fluid.

[0011] The robotic arm removes the workpiece and sends it to the image dimension measuring instrument to check all dimensions in process one.

[0012] The robotic arm transports the workpiece to the flipping station in the flipping direction, and then sends it to the first turning center responsible for the second process, where it is clamped by a three-jaw chuck; the fiber direction is identified and compensated again.

[0013] The second machining process is executed, machining the convex outer circle and top surface; a 0.5mm allowance is reserved for the first piece; after the dimensions are detected by the measuring head in the first machine, they are compared with the preset values, and the difference is compensated to the first turning center; the first turning center starts the finishing program and the machining is completed; the turning spindle speed is 600-800r / min, the cutting depth is 0.5-0.8mm, and the feed rate is 0.1-0.15mm / r; the tool is a PCD insert turning tool; the feed linear speed for the top surface grinding is not greater than 3500mm / min, the step distance is 0.6-0.8mm, and the tool is a 50-mesh φ20 coated diamond grinding head;

[0014] After processing, rinse and rotate at high speed;

[0015] The robotic arm removes the workpiece and sends it to the image size measuring instrument to check the second dimension of the process. After passing the inspection, the robotic arm sends the workpiece back to the hopper.

[0016] In the above-mentioned automatic processing method for composite material circular cover plates, the automatic processing system is specifically installed as follows:

[0017] The first turning center, the second turning center, the image dimension measuring instrument, and the turnover station are arranged in a straight line under the truss; the material bin is located within the reach of the robot arm opposite the first and second turning centers; the first and second turning centers are respectively equipped with the first and second internal probes; a three-jaw hydraulic cylinder, a first high-precision hydraulic gauge, and a second high-precision hydraulic gauge are installed inside the machine; an industrial camera, a first gripper, and a second gripper are installed at the end effector of the robot arm; the first and second chip conveyors are located below the machine tool; the first and second chip conveyors... The outlet of the device is connected to the inlet of the first multi-stage sedimentation tank and the second multi-stage sedimentation tank, respectively. The first and second multi-stage sedimentation tanks are divided into interconnected multi-stage water tanks by a first baffle, a second baffle, a third baffle, and a fourth baffle, namely the first stage water tank, the second stage water tank, the third stage water tank, the fourth stage water tank, and the fifth stage water tank. The first stage water tank is equipped with a first oil-water separator and a second oil-water separator. The outlet is set at the lower end of the first baffle. The fifth stage water tank is equipped with a water pump. The control system is electrically connected to the industrial camera.

[0018] In the above-mentioned automatic processing method for a circular cover plate of composite material, the upper end of the first baffle is flush with the upper ends of the first multi-stage sedimentation tank and the second multi-stage sedimentation tank, and the heights of the second baffle, the fourth baffle and the third baffle decrease step by step.

[0019] In the above-mentioned automatic machining method for a circular cover plate of composite material, the second turning center rotates the spindle according to the compensation value to ensure that the reference is aligned with the fiber direction before starting to machine the concave surface and the end hole.

[0020] In the above-mentioned automatic machining method for a composite circular cover plate, the finishing parameters of the second turning center are as follows: turning spindle speed 800-1000 r / min, cutting depth 0.5-1 mm, feed rate 0.1-0.15 mm / r, and the cutting tool is a PCD insert turning tool; the drilling method is a peck drill, the feed rate is 20-30 mm / min, and the cutting tool is a PCD insert drill bit.

[0021] In the above-mentioned automatic processing method for a circular cover plate made of composite materials, the rotation speed of the spindle is 1000-1500 r / min, and the time is not less than 3s.

[0022] In the above-mentioned automatic machining method for a circular cover plate of composite material, when the first turning center clamps the workpiece with a three-jaw chuck, a three-jaw hydraulic cylinder with a cylinder diameter of 60-75mm is used; the pressure of the three-jaw chuck hydraulic cylinder is 0.35-0.45Mpa.

[0023] In the above-mentioned automatic processing method for a circular cover plate made of composite materials, a first high-precision hydraulic gauge and a second high-precision hydraulic gauge with a minimum reading of no more than 0.05 MPa are used to control the clamping force.

[0024] In the above-described automatic machining method for a composite circular cover plate, the machining parameters of the first turning center are:

[0025] The turning spindle speed is 600-800 r / min; the depth of cut is 0.5-0.8 mm; the feed rate is 0.1-0.15 mm / r; the cutting tool is a PCD insert turning tool; the feed rate for top surface grinding is no more than 3500 mm / min, the step distance is 0.6-0.8 mm, and the cutting tool is a 50-mesh φ20 coated diamond grinding head.

[0026] In the above-mentioned automatic processing method for a circular cover plate made of composite materials, the rotation speed is 800-1000 r / min and the time is not less than 5s.

[0027] The advantages of this invention compared to the prior art are:

[0028] (1) This invention realizes the function of automatically processing composite materials according to the fiber direction;

[0029] (2) This invention achieves rapid online full-size inspection by integrating an image size measuring instrument into the production line;

[0030] (3) This invention detects product dimensions by reserving a margin in the machine tool's internal probe and automatically compensates for it, thus achieving automated debugging of the first piece during frequent production changes;

[0031] (4) The present invention controls the cutting force through process methods, and accurately controls the clamping force with small-diameter hydraulic cylinders and hydraulic gauges, thereby achieving effective control of the deformation of thin-walled parts.

[0032] (5) This invention solves the problem of composite material coolant discharge meeting standards by modifying the chip conveyor to remove large particles and fibers, multi-stage sedimentation to remove suspended particles, and belt oil remover to remove lubricating oil. It is automated and has a low cost.

[0033] (6) The processing system made by the present invention solves the problem of adaptability of composite material products to automatic production line processing and testing, improves efficiency, and meets the production and manufacturing needs of high-quality and rapid response of composite material products in the aerospace field. Attached Figure Description

[0034] Figure 1 This is a front view of the automatic processing system of the present invention;

[0035] Figure 2 This is a top view of the automatic processing system of the present invention;

[0036] Figure 3 This is a schematic diagram of the robotic arm of the present invention;

[0037] Figure 4 This is a schematic diagram of the flipping station of the present invention;

[0038] Figure 5 This is a schematic diagram of the multi-stage sedimentation tank of the present invention;

[0039] Figure 6 This is a schematic diagram of the first turning center of the present invention. Detailed Implementation

[0040] The present invention will be further described below with reference to the embodiments.

[0041] This invention provides an automated processing method for circular composite material covers. By identifying the fiber direction through photography and combining it with C-axis positioning at the turning center, the method enables automated processing of composite materials according to the fiber direction. Integrating an image-based dimensional measuring instrument into the production line enables rapid online full-size inspection. The method utilizes a machine tool's internal probe to detect product dimensions with pre-reserved allowances and automatically compensates, automating the first-piece debugging process during frequent production changes. Controlling cutting forces through process methods, and precisely controlling clamping forces with small-diameter hydraulic cylinders and hydraulic gauges, effectively controls the deformation of thin-walled parts. By modifying the chip conveyor to remove large particles and fibers, using multi-stage sedimentation to remove suspended particles, and employing a belt degreasing machine to remove lubricating oil, the method solves the problem of ensuring the composite material coolant discharge meets standards. The process is automated and cost-effective.

[0042] The automated processing method for composite material circular cover plates includes the following steps:

[0043] An automated processing system for manufacturing circular composite material cover plates. (Example) Figures 1-2 As shown, the automatic machining system includes a turnover station 1, a first turning center 2, a first chip conveyor 3, an image size measuring instrument 4, a control system 6, a first multi-stage settling water tank 7, a first oil-water separator 8, a first in-machine probe 9, a hopper 10, a second multi-stage settling water tank 11, a second chip conveyor 12, a second oil-water separator 13, a second in-machine probe 14, a second turning center 15, a robotic arm 16, a first high-precision hydraulic gauge 17, a second high-precision hydraulic gauge 18, a first gripper 20, a second gripper 21, an industrial camera 22, a first baffle 31, a second baffle 32, a third baffle 33, a water outlet 34, a water inlet 35, a first-stage water tank 36, a second-stage water tank 37, a third-stage water tank 38, a fourth-stage water tank 39, a fifth-stage water tank 40, a fourth baffle 41, a water pump 42, and a three-jaw hydraulic cylinder 43.

[0044] The specific installation method for the automated processing system is as follows:

[0045] The first turning center 2, the second turning center 15, the image size measuring instrument 4, and the flipping station 1 are arranged in a straight line below the truss; the hopper 10 is located within the reach of the robot arm 16 opposite the first turning center 2 and the second turning center 15; the first turning center 2 and the second turning center 15 are respectively equipped with the first internal probe 9 and the second internal probe 14; a three-jaw hydraulic cylinder 43, a first high-precision hydraulic gauge 17, and a second high-precision hydraulic gauge 18 are installed inside the machine; an industrial camera 22, a first gripper 20, and a second gripper 21 are installed at the end of the robot arm 16, such as... Figure 3 As shown. The first chip conveyor 3 and the second chip conveyor 12 are located below the machine tool; the outlets of the first chip conveyor 3 and the second chip conveyor 12 are connected to the inlets 35 of the first multi-stage settling tank 7 and the second multi-stage settling tank 11, respectively; the first multi-stage settling tank 7 and the second multi-stage settling tank 11 are divided into connected multi-stage water tanks by the first baffle 31, the second baffle 32, the third baffle 33, and the fourth baffle 41, namely the first stage water tank 36, the second stage water tank 37, the third stage water tank 38, the fourth stage water tank 39, and the fifth stage water tank 40; the first stage water tank 36 is equipped with the first oil-water separator 8 and the second oil-water separator 13; the lower end of the first baffle 31 is provided with an outlet 34; the fifth stage water tank 40 is equipped with a water pump 42; the control system 6 is electrically connected to the industrial camera 22.

[0046] The structure of the flipping station 1 of the present invention is as follows: Figure 4 As shown. The first turning center 2 and the second turning center 15 have the same structure, as shown. Figure 6 As shown.

[0047] The upper end of the first baffle 31 is flush with the upper ends of the first multi-stage settling tank 7 and the second multi-stage settling tank 11. The heights of the second baffle 32, the fourth baffle 41, and the third baffle 33 decrease progressively. Figure 5 As shown.

[0048] The pallet is pulled out of the hopper 10 by the robot arm 16 and installed onto the three-jaw chuck of the second turning center 15.

[0049] Industrial camera 22 takes pictures; control system 6 identifies the fiber direction through image analysis, calculates the angle between the fiber direction and the current clamping direction, and sends the angle compensation value to the second turning center 15; the second turning center 15 begins to process the concave surface and end face.

[0050] The first piece is machined with a 0.5mm allowance. The second machine's internal measuring head 14 detects the dimensions and compares them with the preset values. The difference is then compensated to the second turning center 15. The second turning center 15 rotates the spindle according to the compensation value. After ensuring that the reference is aligned with the fiber direction, it begins machining the concave surface and the end face.

[0051] The finishing parameters for the second turning center 15 are as follows: turning spindle speed 800-1000 r / min, cutting depth 0.5-1 mm, feed rate 0.1-0.15 mm / r, and PCD insert turning tool; drilling method is peck drill, feed rate 20-30 mm / min, and PCD insert drill bit.

[0052] After machining, the coolant nozzles inside the second turning center 15 clean the workpiece debris, and the spindle rotates at high speed to remove the cutting fluid. The spindle rotation speed is 1000-1500 r / min, and the time is no less than 3 seconds.

[0053] Robot arm 16 removes the workpiece and sends it to image dimension measuring instrument 4 to inspect all dimensions in process one;

[0054] The robotic arm 16 transports the workpiece to the flipping station 1 in the flipping direction, and then sends it to the first turning center 2, which is responsible for the second process, for clamping via a three-jaw chuck; the fiber direction is identified and compensated again. When the first turning center 2 clamps the workpiece via the three-jaw chuck, it uses a three-jaw hydraulic cylinder 43 with a cylinder diameter of 60-75mm; the pressure of the three-jaw chuck hydraulic cylinder is 0.35-0.45Mpa.

[0055] The clamping force is controlled by a first high-precision hydraulic gauge 17 and a second high-precision hydraulic gauge 18, with a minimum reading of no more than 0.05 MPa.

[0056] The second machining process is executed to machine the convex outer circle and top surface. A 0.5mm allowance is reserved for the first piece. After the inner measuring head 9 of the first machine detects the size, it is compared with the preset value. The difference is compensated to the first turning center 2, and the first turning center 2 starts the finishing program to complete the machining.

[0057] The machining parameters for the first turning center 2 are:

[0058] The turning spindle speed is 600-800 r / min; the depth of cut is 0.5-0.8 mm; the feed rate is 0.1-0.15 mm / r; the cutting tool is a PCD insert turning tool; the feed rate for top surface grinding is no more than 3500 mm / min, the step distance is 0.6-0.8 mm, and the cutting tool is a 50-mesh φ20 coated diamond grinding head.

[0059] After processing, rinse and rotate at high speed; the rotation speed is 800-1000 r / min, and the time is not less than 5 seconds.

[0060] The robot arm 16 takes out the workpiece and sends it to the image size measuring instrument 4 to check the dimensions of the second process. After passing the inspection, the robot arm 16 sends the workpiece back to the material bin 10.

[0061] As an improvement of the present invention, by taking pictures to identify the fiber direction and combining it with the C-axis positioning of the turning center, the function of automatically processing composite materials according to the fiber direction is realized.

[0062] As an improvement of the present invention, an online full-size rapid inspection is achieved by integrating an image size measuring instrument into the production line.

[0063] As an improvement of the present invention, the product size is detected by reserving a margin in the internal probe of the machine tool and automatically compensated, thereby realizing the automation of the first piece debugging in frequent production changes.

[0064] As an improvement of the present invention, the cutting force is controlled by process methods, and the clamping force is precisely controlled by small-diameter hydraulic cylinders and hydraulic gauges, thereby achieving effective control of the deformation of thin-walled parts.

[0065] As an improvement to this invention, a modified chip conveyor removes large particles and fibers, multi-stage sedimentation removes suspended particles, and a belt degreaser removes lubricating oil. The chip conveyor outlet has a mesh structure, intercepting large particles and fibers inside the conveyor, which are then conveyed to a chip cart by the chip conveyor scraper. Wastewater is discharged into a settling tank. In the first-stage tank, a belt degreaser removes oil from the surface of the liquid. A baffle at the top of the first-stage tank holds the oil within this stage, and water flows from the bottom of the first-stage tank to the next stage. Subsequent stages allow water to flow from the top of the baffles into the next stage tank, where it settles through multiple stages. The large volume and multi-stage structure of the tanks reduce the water flow velocity, preventing the formation of a stratosphere that would cause rapid outflow of new water, increasing settling time, and removing most suspended particles. This device solves the problem of ensuring that composite material coolant discharge meets standards, is automated, and has a low cost.

[0066] Compared with existing common metal automated processing production lines, this invention solves problems such as fiber orientation identification, wastewater treatment, deformation control, multiple processes, and automation of dimensional detection in the construction of automated processing production lines for composite materials. It also automates the manual debugging of the first piece in general production lines, meeting the high-quality and high-efficiency production and manufacturing needs of composite material products in the aerospace field.

[0067] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

Claims

1. An automatic processing method for a circular cover plate made of composite materials, characterized in that: include: An automated machining system for producing composite circular cover plates; the automated machining system includes a turnover station (1), a first turning center (2), a first chip conveyor (3), an image size measuring instrument (4), a control system (6), a first multi-stage settling tank (7), a first oil-water separator (8), a first in-machine probe (9), a hopper (10), a second multi-stage settling tank (11), a second chip conveyor (12), a second oil-water separator (13), a second in-machine probe (14), a second turning center (15), and a robotic arm (16). 6) First high-precision hydraulic gauge (17), second high-precision hydraulic gauge (18), first gripper (20), second gripper (21), industrial camera (22), first baffle (31), second baffle (32), third baffle (33), outlet (34), inlet (35), first-stage water tank (36), second-stage water tank (37), third-stage water tank (38), fourth-stage water tank (39), fifth-stage water tank (40), fourth baffle (41), water pump (42), three-jaw hydraulic cylinder (43); The specific installation method for the automated processing system is as follows: The first turning center (2), the second turning center (15), the image size measuring instrument (4), and the turnover station (1) are arranged in a straight line below the truss; the hopper (10) is located within the reach of the robot arm (16) opposite the first turning center (2) and the second turning center (15); the first turning center (2) and the second turning center (15) are respectively equipped with the first internal probe (9) and the second internal probe (14); the machine is equipped with a three-jaw hydraulic cylinder (43), the first high-precision hydraulic gauge (17), and the second high-precision hydraulic gauge (18); the robot arm (16) is equipped with an industrial camera (22), the first gripper (20), and the second gripper (21); the first chip conveyor (3) and the second chip conveyor (12) are located below the machine tool; the first chip conveyor (3) and the second chip conveyor (12) are located at the end of the machine tool. The water inlet is connected to the inlet (35) of the first multi-stage sedimentation tank (7) and the second multi-stage sedimentation tank (11) respectively; the first multi-stage sedimentation tank (7) and the second multi-stage sedimentation tank (11) are divided into connected multi-stage water tanks by the first baffle (31), the second baffle (32), the third baffle (33), and the fourth baffle (41), namely the first stage water tank (36), the second stage water tank (37), the third stage water tank (38), the fourth stage water tank (39), and the fifth stage water tank (40); the first stage water tank (36) is equipped with the first oil-water separator (8) and the second oil-water separator (13); the lower end of the first baffle (31) is provided with the outlet (34); the fifth stage water tank (40) is equipped with the water pump (42); the control system (6) is electrically connected to the industrial camera (22); The pallet is pulled out of the hopper (10) by the robot (16) and installed onto the three-jaw chuck of the second turning center (15); The industrial camera (22) takes pictures; the control system (6) identifies the fiber direction through image analysis, calculates the angle between the fiber direction and the current clamping direction, and sends the angle compensation value to the second turning center (15); the second turning center (15) starts to process the concave surface and the end face; The first piece is machined with a 0.5mm allowance; the second machine's internal probe (14) detects the dimensions and compares them with the preset values, and the difference is compensated to the second turning center (15). After machining, the coolant nozzles in the second turning center (15) clean the workpiece debris, and the spindle rotates at high speed to dry the cutting fluid; The robotic arm (16) takes out the workpiece and sends it to the image size measuring instrument (4) to check all dimensions in process one; The robot (16) transports the workpiece to the flipping station (1) to flip it in the correct direction, and then sends it to the first turning center (2) responsible for the second process, where it is clamped by a three-jaw chuck; the fiber direction is identified and compensated again. The second machining process is executed to machine the outer circle and top surface of the convex surface; the first piece is machined with a 0.5mm allowance. After the first machine internal probe (9) detects the size, it is compared with the preset value and the difference is compensated to the first turning center (2). The first turning center (2) starts the finishing process and the machining is completed. After processing, rinse and rotate at high speed; The robot (16) takes out the workpiece and sends it to the image size measuring instrument (4) to check the size of the second process. After passing the inspection, the robot (16) sends the workpiece back to the silo (10).

2. The automatic processing method for a composite material circular cover plate according to claim 1, characterized in that: The upper end of the first baffle (31) is flush with the upper ends of the first multi-stage sedimentation tank (7) and the second multi-stage sedimentation tank (11), and the heights of the second baffle (32), the fourth baffle (41) and the third baffle (33) decrease step by step.

3. The automatic processing method for a composite material circular cover plate according to claim 1, characterized in that: The second turning center (15) rotates the spindle according to the compensation value to ensure that the reference and the fiber direction are aligned before starting to process the concave surface and the end face.

4. The automatic processing method for a composite material circular cover plate according to claim 1, characterized in that: The finishing parameters of the second turning center (15) are as follows: the turning spindle speed is 800-1000 r / min, the cutting depth is 0.5-1 mm, the feed rate is 0.1-0.15 mm / r, and the tool is a PCD insert turning tool; the drilling method is a pecking drill, the feed rate is 20-30 mm / min, and the tool is a PCD insert drill bit.

5. The automatic processing method for a circular composite material cover plate according to claim 1, characterized in that: The spindle rotates at a speed of 1000-1500 r / min for a duration of no less than 3 seconds.

6. The automatic processing method for a circular composite material cover plate according to claim 1, characterized in that: When the first turning center (2) clamps the workpiece with a three-jaw chuck, a three-jaw hydraulic cylinder (43) with a cylinder diameter of 60-75mm is used; the pressure of the three-jaw chuck hydraulic cylinder is 0.35-0.45Mpa.

7. The automatic processing method for a composite material circular cover plate according to claim 6, characterized in that: The clamping force is controlled by a first high-precision hydraulic gauge (17) and a second high-precision hydraulic gauge (18) with a minimum reading of no more than 0.05 MPa.

8. The automatic processing method for a composite material circular cover plate according to claim 1, characterized in that: The machining parameters of the first turning center (2) are: The turning spindle speed is 600-800 r / min; the depth of cut is 0.5-0.8 mm; the feed rate is 0.1-0.15 mm / r; the cutting tool is a PCD insert turning tool; the feed rate for top surface grinding is no more than 3500 mm / min, the step distance is 0.6-0.8 mm, and the cutting tool is a 50-mesh φ20 coated diamond grinding head.

9. The automatic processing method for a circular composite material cover plate according to claim 1, characterized in that: Rotation speed 800-1000 r / min, time no less than 5 s.

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