Wafer-shaped part machining method

Abstract

The invention relates to a disc-shaped part machining method which comprises the steps that S1, a plate delivered in a performance heat treatment state is selected as a blank, the blank is cut and machined into a disc-shaped part, and machining allowances are reserved on the inner circle and the outer circle of the disc-shaped part; s2, an oil press is used for correcting the surface of the disc-shaped part, and rough turning machining is conducted on the disc-shaped part on a vertical lathe; s3, stress relief heat treatment is conducted on the disc-shaped part, and the upper surface of the disc-shaped part is coated with an epoxy resin layer; s4, the epoxy resin layer on the upper surface of the disc-shaped part is subjected to finish turning on the vertical lathe till the epoxy resin layer is completely shiny, then the disc-shaped part is turned over, the lower surface of the disc-shaped part is subjected to finish turning till the epoxy resin layer is completely shiny, and plane runout of the lower surface of the disc-shaped part meets the drawing requirement; and S5, the disc-shaped part is turned over again, the epoxy resin layer on the upper surface of the disc-shaped part is removed, and the thickness of the disc-shaped part is subjected to finish turning till the final size is achieved. The machining method can effectively solve the problem of machining deformation.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to a method for machining circular flat parts. Background Technology

[0002] Currently, there exists a circular plate-shaped part with various specifications. The outer diameter of this part is approximately 2000 mm, and it has an inner circle with a maximum diameter of approximately 800 mm at its center. A single-sided annular groove connects the outer and inner circles, with a wall thickness of approximately 5 mm at the groove location and a maximum wall thickness of approximately 10 mm at other locations. Furthermore, the wall thickness tolerance of this circular plate-shaped part is required to be ±0.05 mm, and the flatness requirement is ≤0.5 mm.

[0003] Clearly, this disc-shaped part is essentially a large-diameter, thin-walled component. It is highly susceptible to deformation during clamping, handling, and material springback during cutting and tool deflection, making it difficult to guarantee dimensional and positional accuracy during machining. Furthermore, the part is made of precipitation-hardening stainless steel, which has high yield strength and hardness, making it a difficult-to-machine material. Since there are no blank forgings available on the market, only sheet metal can be used as the blank. The maximum surface unevenness of the sheet metal in its delivered state is close to 13mm, which is too large for direct machining. It requires shaping before processing, but the internal stress generated during shaping will severely affect subsequent machining, further increasing the difficulty of machining. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a method for machining circular sheet-like parts that can effectively solve the problem of machining deformation.

[0005] The present invention adopts the following technical solution:

[0006] This invention provides a method for processing circular sheet-like parts, comprising the following steps:

[0007] S1: Select sheet metal delivered in a heat-treated state as raw material, cut the raw material into round parts, and make machining allowances on both the inner and outer circles of the round parts.

[0008] S2: Use a hydraulic press to straighten the surface of the disc-shaped part, and perform rough machining on the inner and outer circles and the upper and lower surfaces of the disc-shaped part on a vertical lathe;

[0009] S3: Perform stress-relieving heat treatment on the disc-shaped parts and apply an epoxy resin layer to the upper surface of the disc-shaped parts.

[0010] S4: On a vertical lathe, the epoxy resin layer on the upper surface of the disc-shaped part is precision machined until it is completely smooth. Then, the disc-shaped part is flipped over and the lower surface is precision machined until it is completely smooth, and the runout of the lower surface of the disc-shaped part meets the requirements of the drawing.

[0011] S5: Flip the disc-shaped part over again, remove the epoxy resin layer on the upper surface of the disc-shaped part, and finish machine the thickness of the disc-shaped part to the final size.

[0012] Preferably, in step S2, a rhomboid insert with a tip radius of 0.8 mm is used to rough-machine the circular sheet-like part with a depth of cut of 0.2-0.3 mm per cut and a feed rate of 0.3-0.4 mm / r.

[0013] Preferably, in step S2, after rough machining the circular part to achieve a single-sided cutting depth of 1-2 mm, the circular part is flipped over and rough machining is continued.

[0014] Preferably, in step S2, before rough machining the disc-shaped part, the template fixture is first laid flat and clamped on the turntable of the vertical lathe, and then the disc-shaped part is laid flat on the template fixture. The template fixture has eight or more T-slots evenly distributed in a circumferential direction. Each T-slot extends radially from the outer circle to the inner circle of the template fixture, and a micro jig is slidably arranged in each T-slot. The micro jigs in the eight or more T-slots alternately abut and limit the inner / outer circle of the disc-shaped part, clamping the disc-shaped part on the vertical lathe.

[0015] Preferably, the miniature clamp includes a support, a locking block, and an arc-shaped clamping block. The support is screwed with an adjusting screw and has a locking hole. The locking block is screwed with a locking screw. Both the support and the locking block are slidably disposed in the T-slot of the template tooling, and the locking block is located above the support. When clamping the disc-shaped part, the locking screw is screwed into the locking hole and abuts against the bottom wall of the T-slot. The arc-shaped clamping block is placed between the disc-shaped part and the support, and the adjusting screw presses the arc-shaped clamping block against the inner / outer circle of the disc-shaped part.

[0016] Preferably, in step S2, when flipping the disc-shaped part, first remove the miniature clamps on the template fixture, then place another template fixture upside down on the disc-shaped part. The two template fixtures and the disc-shaped part in the middle are fastened together with bolts to form a flipping structure. Then, lift the flipping structure to flip it in the air and place it flat on the ground. Then, disconnect the connection between the two template fixtures and lift away the upper template fixture. Then, reinstall the miniature clamps on the lower template fixture to clamp the disc-shaped part. Finally, the template fixture with the disc-shaped part clamped is horizontally lifted to the turntable of the vertical lathe.

[0017] Preferably, in step S3, before stress-relieving heat treatment of the disc-shaped part, the disc-shaped part is clamped and shaped by a shaping fixture. The shaping fixture includes a base plate and a cover plate. The disc-shaped part is first placed on the base plate, and then the cover plate is hoisted and pressed onto the base plate. The base plate, the cover plate and the disc-shaped part in the middle are fastened together by bolts to form a heat treatment structure.

[0018] Preferably, in step S3, after the disc-shaped part has completed stress-relieving heat treatment and cooled to room temperature, the template fixture is first placed flat on the ground, and then the disc-shaped part is placed on the template fixture. Then, epoxy resin is applied to the upper surface of the disc-shaped part, and the inner and outer circles of the disc-shaped part are wrapped with gauze for protection. After the epoxy resin has completely solidified to form an epoxy resin layer, the disc-shaped part and the template fixture are hoisted together onto the vertical lathe.

[0019] Preferably, in step S3, the placement of the disc-shaped part on the base plate before stress-relief heat treatment and on the template fixture after stress-relief heat treatment are both achieved by a hoisting fixture. The hoisting fixture includes a lifting beam, a hydraulic permanent magnet, and an intelligent hydraulic control system. Multiple hydraulic permanent magnets are arranged circumferentially at equal intervals on the lifting beam, and each hydraulic permanent magnet is elastically connected to the lifting beam. The intelligent hydraulic control system is electrically connected to all the hydraulic permanent magnets and controls the magnetic force of the hydraulic permanent magnets. All the hydraulic permanent magnets are simultaneously attracted to the surface of the disc-shaped part, and then the disc-shaped part is hoisted together with the hoisting fixture.

[0020] Preferably, in step S5, when flipping the disc-shaped part, first remove the miniature clamp on the template fixture, then place the magnetic magnet mold upside down on the disc-shaped part, then open the magnetic switch on the magnetic magnet mold to attract the disc-shaped part together with the template fixture below to form a magnetic structure, then lift the magnetic structure to flip it in the air and place the magnetic structure flat on the ground, then close the magnetic switch and lift away the template fixture above, then open the magnetic switch again and lift the magnetic magnet mold with the disc-shaped part attached to it to the vertical lathe.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] The innovative method for processing disc-shaped parts in this invention uses epoxy resin as a filler. After finishing the epoxy resin layer in step 4, flipping the disc-shaped part allows the epoxy resin layer to be located underneath. This completely eliminates the gaps caused by unevenness on the surface of the disc-shaped part, increasing its rigidity. When turning the lower surface of the disc-shaped part, the springback deformation caused by the bottom being unsupported is eliminated, effectively solving the problem of processing deformation of disc-shaped parts. Attached Figure Description

[0023] Figure 1This is a diagram showing the usage state of the template tooling used in step S2 of the circular part processing method in this embodiment of the invention.

[0024] Figure 2 This is a diagram showing the usage status of the micro-clamp used in step S2 of the circular part processing method in this embodiment of the invention.

[0025] Figure 3 This is a cross-sectional view of the micro jig used in step S2 of the circular part processing method in this embodiment of the invention.

[0026] Figure 4 This is a state diagram of the precision machining of the lower surface of the circular sheet-like part in step S4 of the processing method for the circular sheet-like part in an embodiment of the present invention.

[0027] Figure 5 This is a schematic diagram of the flipped structure formed in step S2 of the circular part processing method in this embodiment of the invention.

[0028] Figure 6 This is a cross-sectional view of the flipped structure formed in step S2 of the circular part processing method in this embodiment of the invention.

[0029] Figure 7 This is a top view of the shaping fixture used in step S3 of the circular part processing method in this embodiment of the invention.

[0030] Figure 8 This is a front view of the shaping tooling used in step S3 of the circular part processing method in this embodiment of the invention.

[0031] Figure 9 This is a diagram showing the usage status of the hoisting fixture used in step S3 of the circular part processing method in this embodiment of the invention.

[0032] Figure 10 This is a diagram showing the usage state of the magnetic magnet mold used in step S5 of the circular part processing method in this embodiment of the invention.

[0033] Figure 11 This is a cross-sectional view of the magnetic magnet in use in step S5 of the circular part processing method in this embodiment of the invention.

[0034] The reference numerals in the attached figures are explained as follows:

[0035] 1. Circular disc-shaped parts; 2. Template fixture; 201. T-slot; 3. Miniature clamp; 301. Support; 302. Locking block; 303. Arc-shaped clamp; 304. Adjusting screw; 305. Locking screw; 4. Epoxy resin layer; 5. Shaping fixture; 501. Base plate; 502. Cover plate; 6. Lifting fixture; 601. Lifting beam; 602. Hydraulic permanent magnet; 7. Magnetic magnet mold. Detailed Implementation

[0036] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0037] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0040] Combination Figures 1 to 11 This embodiment provides a method for processing a circular sheet-like part, including the following steps:

[0041] S1: Select a sheet metal delivered in a heat-treated state as the blank, cut the blank into a circular part 1, and leave machining allowance for both the inner and outer circles of the circular part 1.

[0042] S2: Use a hydraulic press to straighten the surface of the disc-shaped part 1, and perform rough machining on the inner and outer circles and the upper and lower surfaces of the disc-shaped part 1 on a vertical lathe;

[0043] S3: Perform stress-relieving heat treatment on the disc-shaped part 1, and coat the upper surface of the disc-shaped part 1 with an epoxy resin layer 4.

[0044] S4: On a vertical lathe, the epoxy resin layer 4 on the upper surface of the disc-shaped part 1 is precision machined until it is completely smooth. Then, the disc-shaped part 1 is flipped over and the lower surface is precision machined until it is completely smooth, and the runout of the lower surface of the disc-shaped part 1 meets the requirements of the drawing.

[0045] S5: Flip the disc-shaped part 1 again, remove the epoxy resin layer 4 on the upper surface of the disc-shaped part 1, and finish machine the thickness of the disc-shaped part 1 to the final size.

[0046] The method for machining disc-shaped parts in this embodiment innovatively uses epoxy resin as a filler. After finishing the epoxy resin layer 4 in step S4, flipping the disc-shaped part 1 allows the epoxy resin layer 4 to be located underneath. This completely eliminates the gaps caused by the unevenness of the disc-shaped part 1 surface through the epoxy resin layer 4, increasing the rigidity of the disc-shaped part 1. When turning the lower surface of the disc-shaped part 1, the tool deflection caused by the bottom being unsupported will be eliminated, avoiding material springback deformation and effectively solving the machining deformation problem of the disc-shaped part 1.

[0047] Preferably, in step S1 of this embodiment, the blank is water-cut to produce a circular piece 1.

[0048] It should be noted that water jet cutting has relatively low cutting force and heat. Using water jet cutting to process the blank into a circular part 1 can reduce the deformation of the blank during processing. Stress relief heat treatment can ensure that the circular part 1 will not deform due to processing stress during subsequent precision turning.

[0049] Preferably, in this embodiment, in step S1, the blank is a square plate, and a machining allowance of 50mm is reserved on one side of the square plate. After the blank is water-cut into a circular part 1, a machining allowance of 10mm is reserved on both the inner and outer circles of the circular part 1.

[0050] Preferably, in this embodiment, in step S2, after the surface of the disc-shaped part 1 is straightened using a hydraulic press, the surface flatness of the disc-shaped part 1 is corrected to ≤5mm.

[0051] Preferably, in step S2, a rhomboid insert with a tip radius of 0.8 mm is used to rough-turn the circular piece 1 with a depth of cut of 0.2-0.3 mm per cut and a feed rate of 0.3-0.4 mm / r. The purpose of rough turning is mainly to remove machining allowance and to flatten the uneven areas on the surface of the circular piece 1 as much as possible. Using a sharp, small-cornered rhomboid insert and a small depth of cut and slow feed rate for rough turning can reduce cutting force and cutting heat, and prevent excessive deformation of the circular piece 1.

[0052] Similarly, in this embodiment, in order to reduce the deformation caused by the cutting force, steps S4 and S5 also use a rhomboid insert with a tip radius of 0.8 mm to perform finish turning with a depth of cut of 0.2-0.3 mm per cut and a feed rate of 0.3-0.4 mm / r.

[0053] Preferably, in step S2, after rough turning the circular plate-shaped part 1 to achieve a single-sided cutting depth of 1-2 mm, the circular plate-shaped part 1 is flipped over and rough turning is continued. Since the circular plate-shaped part 1 has a large machining allowance before rough turning, excessive removal of machining allowance on one side during rough turning will disrupt the stress balance inside the material, leading to stress release and deformation. Therefore, the circular plate-shaped part 1 needs to be flipped over repeatedly during the cutting process to balance the deformation stress on both sides.

[0054] Preferably, see Figure 1 In step S2, before rough machining the disc-shaped part 1, the template fixture 2 is first laid flat and clamped on the turntable of the vertical lathe. Then, the disc-shaped part 1 is laid flat on the template fixture 2. The template fixture 2 has eight or more T-slots 201 evenly distributed in a circumferential direction. Each T-slot 201 extends radially from the outer circle to the inner circle of the template fixture 2. Each T-slot 201 is slidably equipped with a micro jig 3. The micro jigs 3 in the eight or more T-slots 201 alternately abut and limit the inner / outer circle of the disc-shaped part 1, clamping the disc-shaped part 1 on the vertical lathe.

[0055] It should be noted that the miniature fixture 3 has two main functions: first, it facilitates the adjustment of the position of the disc-shaped part 1 so that it is located in the center of the template fixture 2 to meet the requirements of turning; second, it applies a small clamping force to the disc-shaped part 1 and is easy to adjust, so that the disc-shaped part 1 will not be deformed due to excessive clamping force.

[0056] Preferably, in this embodiment, in step S2, the bottom of the template fixture 2 is leveled with a standard block, so that the template fixture 2 is placed flat on the turntable of the vertical lathe; in addition, because the circular piece 1 in step S2 is not flat and the bottom gap of the circular piece 1 is large, after the circular piece 1 is placed flat on the template fixture 2, it is necessary to use plugs of different thicknesses to fill the bottom gap of the circular piece 1.

[0057] Preferably, in this embodiment, in step S5, when the epoxy resin layer 4 on the upper surface of the disc-shaped part 1 is removed by precision machining, the disc-shaped part 1 is clamped using the same clamping method as in step S2.

[0058] Preferably, see Figure 2 and Figure 3The miniature clamp 3 includes a support 301, a locking block 302, and an arc-shaped clamping block 303. The support 301 is screwed with an adjusting screw 304 and has a locking hole. The locking block 302 is screwed with a locking screw 305. The support 301 and the locking block 302 are slidably disposed in the T-slot 201 of the template tooling 2, and the locking block 302 is located above the support 301. When clamping the disc-shaped part 1, the locking screw 305 is screwed into the locking hole and abuts against the bottom wall of the T-slot 201. The arc-shaped clamping block 303 is placed between the disc-shaped part 1 and the support 301, and the adjusting screw 304 presses the arc-shaped clamping block 303 against the inner / outer circle of the disc-shaped part 1.

[0059] It should be noted that, in combination Figure 2 and Figure 3 The installation method of the miniature clamp 3 is as follows: First, screw the adjusting screw 304 into the support 301, then slide the support 301 into the T-slot 201 of the template fixture 2, and move the support 301 to a suitable position away from the disc-shaped part 1. Then, put the locking block 302 into the T-slot 201 of the template fixture 2 and screw in the locking screw 305. Then, screw the locking screw 305 into the locking hole and abut against the bottom wall of the T-slot 201 to fix the support 301 on the template fixture 2. Then, place the arc-shaped clamping block 303 between the support 301 and the disc-shaped part 1, so that the arc-shaped clamping block 303 is in complete contact with the disc-shaped part 1. Then, use an adjustable wrench to tighten the adjusting screw 304 until it contacts the arc-shaped clamping block 303, and finally clamp the disc-shaped part 1.

[0060] In addition, if abnormal runout of the plane of the disc-shaped part 1 is found during the cutting process, the clamping force on the disc-shaped part 1 can be adjusted by adjusting the screw 304.

[0061] Preferably, see Figure 1 , Figure 5 and Figure 6 In step S2, when flipping the disc-shaped part 1, first remove the miniature clamp 3 on the template fixture 2, then place another template fixture 2 upside down on the disc-shaped part 1. The two template fixtures 2 and the disc-shaped part 1 in the middle are fastened together by bolts to form a flipping structure. Then, lift the flipping structure to flip it in the air and place the flipping structure flat on the ground. Then, disconnect the connection between the two template fixtures 2 and lift away the upper template fixture 2. Then, reinstall the miniature clamp 3 on the lower template fixture 2 to clamp the disc-shaped part 1. Finally, the template fixture 2 with the disc-shaped part 1 clamped is horizontally lifted to the turntable of the vertical lathe.

[0062] Because the wall thickness of the disc-shaped part 1 is too thin, uneven lifting force can easily cause deformation. Even using multi-point lifting equipment cannot eliminate the deformation. Therefore, a flip structure is specially used to lift the disc-shaped part 1 by fastening two template fixtures 2 together with the disc-shaped part 1 in the middle with bolts. The upper and lower surfaces of the disc-shaped part 1 are in close contact with the two template fixtures 2, which plays a good role in restraining and shaping. When flipping, the disc-shaped part 1 will not move under the friction and the tension of the bolts, which plays a good role in preventing deformation.

[0063] Better, see Figure 5 and Figure 6 In this embodiment, the template tool 2 is provided with through-holes. When flipping the circular piece 1, the two template tools 2 are connected by bolts through the through-holes, and thus are fastened to the central circular piece 1 to form a flipping structure.

[0064] Specifically, see Figure 5 In this embodiment, the template fixture 2 is provided with twelve through-holes at equal intervals in the circumference, so that the two template fixtures 2 and the central circular piece 1 can be firmly attached and tightened by twelve hexagonal head bolts and hexagonal nuts.

[0065] Better, see Figure 4 In this embodiment, in step S4, after the epoxy resin layer 4 on the upper surface of the disc-shaped part 1 is precision machined to a completely smooth finish on a vertical lathe, the disc-shaped part 1 is flipped over using the same flipping method as in step S2, and then the lower surface of the disc-shaped part 1 is precision machined to a completely smooth finish.

[0066] Preferably, see Figure 7 and Figure 8 In step S3, before performing stress-relief heat treatment on the disc-shaped part 1, the disc-shaped part 1 is clamped and shaped using a shaping fixture 5. The shaping fixture 5 includes a base plate 501 and a cover plate 502. First, the disc-shaped part 1 is placed on the base plate 501, and then the cover plate 502 is hoisted and pressed onto the base plate 501. The base plate 501, the cover plate 502, and the disc-shaped part 1 in the middle are fastened together as a heat treatment structure by bolts. Using the shaping fixture 5 to clamp and shape the disc-shaped part 1 before stress-relief heat treatment can prevent the disc-shaped part 1 from arching and deforming during the heat treatment process. That is to say, during the stress-relief heat treatment of the disc-shaped part 1, the shaping fixture 5 always clamps the disc-shaped part 1 until the stress-relief heat treatment is completed and cooled to room temperature, after which the shaping fixture 5 is removed.

[0067] Better, see Figure 7 and Figure 8In this embodiment, the base plate 501 and cover plate 502 of the shaping fixture 5 are provided with more than twelve through holes. The base plate 501 and cover plate 502 are fitted with hexagonal head bolts through the aligned through holes and tightened with hexagonal nuts, thereby firmly attaching and tightening the base plate 501, cover plate 502 and the circular piece 1 in the middle, which plays a good role in constraining and shaping.

[0068] Preferably, in step S3, after the disc-shaped part 1 has completed stress-relieving heat treatment and cooled to room temperature, the template fixture 2 is first placed flat on the ground, and then the disc-shaped part 1 is placed on the template fixture 2. Then, epoxy resin is applied to the upper surface of the disc-shaped part 1, and the inner and outer circles of the disc-shaped part 1 are wrapped with gauze to prevent epoxy resin from seeping out. After the epoxy resin has completely solidified to form the epoxy resin layer 4, the disc-shaped part 1 and the template fixture 2 are hoisted together to the vertical lathe.

[0069] Because the surface flatness of the sheet metal used for the blank is extremely poor at the time of delivery, the disc-shaped part 1 cannot form an effective reference surface during turning due to the imbalance at the bottom. That is, most of the bottom plane of the disc-shaped part 1 is in an unsupported state during turning, which will inevitably cause the cutting tool to deflect and the material to spring back and deform. Therefore, in this embodiment, epoxy resin is used to fill the gap at the bottom of the disc-shaped part 1. In the subsequent finish turning, the high strength and non-deformation characteristics of solid epoxy resin can be used to easily turn the epoxy resin layer 4 on the disc-shaped part 1 flat to form a completely flat reference surface. Then, the disc-shaped part 1 is flipped so that the surface where the epoxy resin layer 4 is located is used as the reference surface. Then, the other surface of the disc-shaped part 1 is machined. At this time, there is no gap at the bottom of the disc-shaped part 1, thereby eliminating the influence of cutting tool deflection and material springback, and solving the deformation problem.

[0070] In addition, epoxy resin has a certain fluidity and good viscosity. It also has a fast curing speed, high hardness after curing, and is not easy to break. It can firmly adhere to the surface of the disc-shaped part 1, which is conducive to forming a high-quality epoxy resin layer 4 on the disc-shaped part 1.

[0071] Preferably, see Figure 9 In step S3, the setting of the disc-shaped part 1 on the base plate 501 before stress relief heat treatment and on the template fixture 2 after stress relief heat treatment are both achieved by the hoisting fixture 6. The hoisting fixture 6 includes a lifting beam 601, a hydraulic permanent magnet 602 and an intelligent hydraulic control system. Multiple hydraulic permanent magnets 602 are arranged circumferentially at equal intervals on the lifting beam 601, and each hydraulic permanent magnet 602 is elastically connected to the lifting beam 601. The intelligent hydraulic control system is electrically connected to all the hydraulic permanent magnets 602 and controls the magnetic force of the hydraulic permanent magnets 602. All the hydraulic permanent magnets 602 are simultaneously adsorbed on the surface of the disc-shaped part 1, and then the disc-shaped part 1 is hoisted together with the hoisting fixture 6.

[0072] Better, see Figure 9 In this embodiment, a single hydraulically controlled permanent magnet 602 is a cuboid with dimensions of 400mm × 200mm × 120mm. Five hydraulically controlled permanent magnets 602 are mounted on the lifting fixture 6. The "magnetization" and "demagnetization" of these five magnets are synchronously controlled by an intelligent hydraulic control system. The lifting fixture 6 is equipped with a remote control that communicates with the intelligent hydraulic control system. The remote control allows the hydraulically controlled permanent magnets 602 to switch between three levels: "fully magnetized," "fully magnetized," and "demagnetized," with the magnetic force gradually decreasing to zero. Simultaneously, the "fully magnetized" and "fully magnetized" levels are indicated by different colored indicator lights on the individual hydraulically controlled permanent magnet 602 and the lifting beam 601, respectively. This lifting fixture 6 ensures synchronous and uniform magnetic attraction during lifting, and the large contact area between the hydraulically controlled permanent magnet 602 and the circular part 1 increases the stress area of ​​the circular part 1, resulting in excellent anti-deformation effects.

[0073] Preferably, see Figure 10 and Figure 11 In step S5, when flipping the disc-shaped part 1, first remove the miniature clamp 3 on the template fixture 2, then place the magnetic magnet mold 7 upside down on the disc-shaped part 1. Next, open the magnetic switch on the magnetic magnet mold 7 to attract the disc-shaped part 1 along with the template fixture 2 below, forming a magnetic structure. Then, lift the magnetic structure, flip it over in mid-air, and place it flat on the ground. Next, close the magnetic switch and remove the template fixture 2 above. Then, open the magnetic switch again and lift the magnetic magnet mold 7, which holds the disc-shaped part 1, onto the vertical lathe. Similarly, the magnetic magnet mold 7 is designed to prevent further deformation of the disc-shaped part 1 due to improper clamping.

[0074] In summary, the method for processing circular sheet-like parts of the present invention, as well as the tooling and fixtures used in the method, can effectively prevent deformation of large-diameter thin sheet parts, and has significant reference value for preventing deformation during the processing of similar parts.

[0075] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A method for processing a circular sheet-like part, characterized in that, Includes the following steps: S1: Select a plate material delivered in a heat-treated state as the blank material, cut the blank material into a circular part (1), and make a machining allowance reserved for both the inner and outer circles of the circular part (1); S2: Use a hydraulic press to straighten the surface of the disc-shaped part (1), and perform rough machining on the inner and outer circles and upper and lower surfaces of the disc-shaped part (1) on a vertical lathe; S3: Perform stress-relieving heat treatment on the disc-shaped part (1) and apply an epoxy resin layer (4) to the upper surface of the disc-shaped part (1). S4: On a vertical lathe, the epoxy resin layer (4) on the upper surface of the disc-shaped part (1) is precision machined until it is completely smooth. Then, the disc-shaped part (1) is flipped over and the lower surface is precision machined until it is completely smooth, and the runout of the lower surface of the disc-shaped part (1) meets the requirements of the drawing. S5: Flip the disc-shaped part (1) again, remove the epoxy resin layer (4) on the upper surface of the disc-shaped part (1), and finish machine the thickness of the disc-shaped part (1) to the final size.

2. The method for processing circular sheet-like parts according to claim 1, characterized in that, In step S2, a diamond-shaped insert with a tip radius of 0.8 mm is used to rough machine the circular part (1) with a depth of cut of 0.2-0.3 mm per cut and a feed rate of 0.3-0.4 mm / r.

3. The method for processing circular sheet-like parts according to claim 1, characterized in that, In step S2, after rough machining the circular piece (1) to achieve a single-sided cutting depth of 1-2 mm, the circular piece (1) is flipped over and rough machining is continued.

4. The method for processing circular sheet-like parts according to claim 3, characterized in that, In step S2, before rough machining the disc-shaped part (1), the template fixture (2) is laid flat and clamped on the turntable of the vertical lathe. Then, the disc-shaped part (1) is laid flat on the template fixture (2). The template fixture (2) has eight or more T-slots (201) evenly distributed in the circumferential direction. Each T-slot (201) extends radially from the outer circle to the inner circle of the template fixture (2). Each T-slot (201) is slidably provided with a micro jig (3). The micro jigs (3) in the eight or more T-slots (201) alternately abut and limit the inner / outer circle of the disc-shaped part (1) to clamp the disc-shaped part (1) on the vertical lathe.

5. The method for processing circular sheet-like parts according to claim 4, characterized in that, The miniature clamp (3) includes a support (301), a locking block (302) and an arc-shaped clamp (303). The support (301) is screwed with an adjusting screw (304) and has a locking hole. The locking block (302) is screwed with a locking screw (305). The support (301) and the locking block (302) are both slidably disposed in the T-slot (201) of the template tooling (2), and the locking block (302) is located above the support (301). When clamping the disc-shaped part (1), the locking screw (305) is screwed into the locking hole and abuts against the bottom wall of the T-slot (201). The arc-shaped clamp (303) is placed between the disc-shaped part (1) and the support (301), and the adjusting screw (304) presses the arc-shaped clamp (303) against the inner / outer circle of the disc-shaped part (1).

6. The method for processing circular sheet-like parts according to claim 4, characterized in that, In step S2, when flipping the disc-shaped part (1), first remove the micro jig (3) on the template fixture (2), then place another template fixture (2) upside down on the disc-shaped part (1). The two template fixtures (2) and the disc-shaped part (1) in the middle are fastened together by bolts to form a flipping structure. Then, lift the flipping structure to flip it in the air and place the flipping structure flat on the ground. Then, disconnect the connection between the two template fixtures (2) and lift away the upper template fixture (2). Then, reinstall the micro jig (3) on the lower template fixture (2) to clamp the disc-shaped part (1). Finally, the template fixture (2) clamping the disc-shaped part (1) is horizontally lifted to the turntable of the vertical lathe.

7. The method for processing circular sheet-like parts according to claim 1, characterized in that, In step S3, before stress relief heat treatment of the disc-shaped part (1), the disc-shaped part (1) is clamped and shaped by the shaping fixture (5). The shaping fixture (5) includes a base plate (501) and a cover plate (502). The disc-shaped part (1) is first placed on the base plate (501), and then the cover plate (502) is hoisted and pressed on the base plate (501). The base plate (501), the cover plate (502) and the disc-shaped part (1) in the middle are fastened together by bolts to form a heat treatment structure.

8. The method for processing circular sheet-like parts according to claim 7, characterized in that, In step S3, after the circular piece (1) has completed stress relief heat treatment and cooled to room temperature, the template fixture (2) is first placed flat on the ground, and then the circular piece (1) is placed on the template fixture (2). Then, epoxy resin is applied to the upper surface of the circular piece (1), and the inner and outer circles of the circular piece (1) are wrapped with gauze for protection. After the epoxy resin has completely solidified to form an epoxy resin layer (4), the circular piece (1) together with the template fixture (2) is hoisted to the vertical lathe.

9. The method for processing circular sheet-like parts according to claim 8, characterized in that, In step S3, the setting of the disc-shaped part (1) on the base plate (501) before stress relief heat treatment and on the template fixture (2) after stress relief heat treatment are both achieved by the hoisting fixture (6). The hoisting fixture (6) includes a lifting beam (601), a hydraulic permanent magnet (602) and an intelligent hydraulic control system. Multiple hydraulic permanent magnets (602) are arranged circumferentially at equal intervals on the lifting beam (601), and each hydraulic permanent magnet (602) is elastically connected to the lifting beam (601). The intelligent hydraulic control system is electrically connected to all the hydraulic permanent magnets (602) and controls the magnetic force of the hydraulic permanent magnets (602). All the hydraulic permanent magnets (602) are simultaneously adsorbed on the surface of the disc-shaped part (1), and then the disc-shaped part (1) is hoisted together with the hoisting fixture (6).

10. The method for processing circular sheet-like parts according to claim 1, characterized in that, In step S5, when flipping the disc-shaped part (1), first remove the micro clamp (3) on the template fixture (2), then place the magnetic magnet mold (7) upside down on the disc-shaped part (1), then open the magnetic switch on the magnetic magnet mold (7) to attract the disc-shaped part (1) together with the template fixture (2) below to form a magnetic structure, then lift the magnetic structure to flip it in the air and place the magnetic structure flat on the ground, then close the magnetic switch and lift away the template fixture (2) above, then open the magnetic switch again and lift the magnetic magnet mold (7) with the disc-shaped part (1) to the vertical lathe.

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