Processing technology of special-shaped thin-walled part

Abstract

The application discloses a processing technology of a special-shaped thin-wall part, and aims to solve the problem of easy deformation in the processing of the special-shaped thin-wall part. The application comprises the following steps: S1, roughening a blank to form a blank part; S2, heat treating the blank part; S3, processing a reference surface on the blank part, and gluing the blank part on a transition plate during processing; S4, semi-finishing the bottom surface and the cavity surface of the blank part; S5, semi-finishing the reverse surface of the cavity surface of the blank part; S6, repeating S3; S7, finishing the bottom surface and the cavity surface; S8, finishing the reverse surface of the cavity surface of the blank part; S9, finishing the reverse surface of the bottom surface; and S10, processing a counter-buckling feature in the cavity of the blank part. The processing technology of the special-shaped thin-wall part is not prone to deformation in the processing of the special-shaped thin-wall part, and the processing quality is ensured.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and more specifically, to a machining process for irregularly shaped thin-walled parts. Background Technology

[0002] With the rapid development of modern manufacturing, one-piece machined thin-walled parts are increasingly widely used in various high-precision equipment due to their stable structure, absence of welding defects, high machining accuracy, stable product quality, high structural strength, and corrosion resistance. However, the machining of one-piece parts is subject to various factors during actual production, including cutting forces, cutting heat, machine tool fixtures, and cutting tools, making the machining process challenging. The main reasons are that irregularly shaped products are difficult to clamp, and the thin walls in certain areas have poor rigidity and strength, making them prone to deformation during machining. This increases the part's shape and position errors, compromising the machining quality. Summary of the Invention

[0003] To overcome the above shortcomings, the present invention provides a processing technology for irregularly shaped thin-walled parts, which is not easily deformed during processing and ensures processing quality.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a processing technology for a non-circular thin-walled part, comprising the following steps: S1, roughing the blank to form a blank; S2, heat treating the blank; S3, machining a reference surface on the blank, during which the blank is glued to a transition plate; S4, semi-finishing the bottom surface and cavity surface of the blank; S5, semi-finishing the reverse side of the cavity surface of the blank; S6, repeating S3; S7, finishing the bottom surface and cavity surface; S8, finishing the reverse side of the cavity surface of the blank; S9, finishing the reverse side of the bottom surface; S10, machining the undercut feature inside the cavity of the blank.

[0005] In the machining of irregularly shaped thin-walled parts, stress relief is achieved through heat treatment after roughing. During the machining of the reference surface, the blank is glued to the transition plate, ensuring reliable positioning and preventing deformation of the irregularly shaped thin-walled blank. Semi-finishing is performed first, followed by finishing, to guarantee machining accuracy. Furthermore, the reference surface is machined before both semi-finishing and finishing, resulting in even greater precision and ensuring machining quality.

[0006] The processing technology for irregularly shaped thin-walled parts in this patent application makes them less prone to deformation during processing, thus ensuring processing quality.

[0007] As a preferred option, the blank in S1 is roughened but a 2.5-3.5mm allowance is reserved on the surface.

[0008] After roughing the blank, leave an appropriate machining allowance to facilitate subsequent machining and ensure machining quality.

[0009] As a preferred option, the S2 blank is heat-treated at a temperature of 195-205℃ for 9-11 hours, followed by natural cooling.

[0010] When the heat treatment temperature and time are appropriate, the stress relief effect is good.

[0011] Preferably, the blank includes a base plate and a cavity shell, with a connecting seat between the base plate and the cavity shell, the base plate being glued to a transition plate, and the reference surface being set on the outer bottom surface of the cavity shell.

[0012] During the machining of the reference surface, the base plate on the blank is glued to the transition plate, resulting in a large connection area and making the blank less prone to deformation.

[0013] Preferably, a through groove is provided on the surface of the base plate, and a positioning block is installed on the transition plate, with the positioning block being fitted and inserted into the through groove.

[0014] When the base plate is connected to the transition plate, the positioning block on the transition plate is fitted into the through slot on the base plate to ensure the accuracy of the blank clamping position.

[0015] Preferably, a shaping plate is provided below the cavity shell, and a shaping column is adapted to be loaded inside the cavity shell, with the shaping column supported between the shaping plate and the bottom of the cavity shell.

[0016] During the machining of the reference surface, the shaping column is inserted into the cavity shell to shape the cavity shell and prevent the irregular thin-walled blank from deforming during the machining process.

[0017] Preferably, in S4 and S7, the blank is clamped on the front fixture, which includes a connecting plate and a zero-position plate. The reference surface of the blank abuts against the surface of the connecting plate, and the blank and the connecting plate are fastened together with screws. The connecting plate is fastened to the zero-position plate.

[0018] When the bottom surface and cavity surface of the blank are semi-finished and finished, the blank is loaded and positioned on the front fixture. After the reference surface on the blank is in contact with the surface of the connecting plate, it is fastened with screws. The connecting plate is fastened to the zero position plate, and the positioning during the machining process is accurate and reliable.

[0019] Preferably, several clamping blocks are fastened to the connecting plate, and clamping blocks are abutted on both the upper and lower sides of the blank.

[0020] The clamping blocks improve the stability of clamping the blank.

[0021] Preferably, in S5 and S8, the blank is clamped on the reverse fixture, which includes a mounting plate and a zero point plate. The front end face of the blank abuts against the surface of the mounting plate, and the blank and the mounting plate are fastened together with screws. The mounting plate is fastened to the zero point plate.

[0022] When the reverse side of the blank cavity is semi-finished and finished, the blank is loaded and positioned on the reverse jig. After the front end of the blank is abutted against the surface of the mounting plate, it is fastened with screws. The mounting plate is fastened to the zero point plate, and the machining process is precise and reliable.

[0023] As a preferred option, after S5, the blank is removed and left to stand for a period of time to release the semi-finishing stress and deformation.

[0024] After semi-finishing, the blank is left to stand still to release stress and deformation.

[0025] Compared with the prior art, the beneficial effects of the present invention are: the processing technology of the irregular thin-walled parts in this patent application makes the irregular thin-walled parts less prone to deformation during processing, thus ensuring processing quality. Attached Figure Description

[0026] Figure 1 This is a structural diagram of the blank part of the present invention.

[0027] Figure 2 This is a reference surface machining and clamping diagram of Embodiment 1 of the present invention.

[0028] Figure 3 This is a schematic diagram of the front fixture of the present invention.

[0029] Figure 4 This is a schematic diagram of the reverse side fixture of the present invention.

[0030] Figure 5 This is a reference surface machining and clamping diagram of Embodiment 2 of the present invention.

[0031] Figure 6 This is a reference surface machining and clamping diagram of Embodiment 3 of the present invention.

[0032] In the figure: 1. Blank, 2. Reference surface, 3. Transition plate, 4. Base plate, 5. Cavity shell, 6. Connecting seat, 7. Through groove, 8. Shaping plate, 9. Shaping column, 10. Filler, 11. Support plate, 12. Support rod, 13. Bottom surface, 14. Cavity surface, 15. Connecting plate, 16. Zero position plate, 17. Clamping block, 18. Mounting plate, 19. Zero point plate. Detailed Implementation

[0033] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings: Example 1: A processing technology for an irregularly shaped thin-walled part (see appendix) Figure 1 To be continued Figure 4 The process includes the following steps: S1, roughing the blank to form a blank 1; in S1, the blank is roughed but a 2.5-3.5mm allowance is reserved on the surface. In this embodiment, the blank is roughed but a 3mm allowance is reserved on the surface. The entire roughing process is carried out on a CNC lathe, and the process holes are processed during the roughing process.

[0034] S2, Heat treatment of blank 1; S2 Heat treatment temperature of blank 1 is 195-205℃, time is 9-11 hours, and natural cooling is performed. In this embodiment, blank 1 is loaded into a heat treatment furnace for heat treatment at a temperature of 200℃ for 10 hours to remove the stress generated during roughing.

[0035] S3. Machining reference surface 2 on blank 1. During machining, blank 1 is glued to transition plate 3. Blank 1 includes base plate 4 and cavity shell 5. Connecting seat 6 is provided between base plate 4 and cavity shell 5. Base plate 4 is glued to transition plate 3. Reference surface 2 is set on the outer bottom surface 13 of cavity shell 5. Through groove 7 is provided on the surface of base plate 4. Positioning block is installed on transition plate 3. Positioning block is fitted into through groove 7. Before machining reference surface 2, hot melt adhesive is applied between base plate 4 and transition plate 3 of blank 1. Then, base plate 4 and transition plate 3 are glued together. Positioning block on transition plate 3 is fitted into through groove 7 to achieve precise positioning. Three through grooves 7 are provided on base plate 4. The middle through groove 7 communicates with cavity shell 5. The through grooves 7 on both sides extend into connecting seat 6. Transition plate 3 is fastened to clamping seat of vertical machine tool. Zero point fixture is provided on clamping seat. Transition plate 3 is connected to zero point fixture. The flatness of datum surface 2 after machining is within 0.02.

[0036] S4, semi-finish machining of the bottom surface 13 and cavity surface 14 of the blank 1; during machining, the blank 1 is clamped on the front fixture, which includes a connecting plate 15 and a zero-position plate 16. The reference surface 2 of the blank 1 abuts against the surface of the connecting plate 15, and the blank 1 and the connecting plate 15 are fastened together with screws. The connecting plate 15 is fastened to the zero-position plate 16. Several clamping blocks 17 are fastened to the connecting plate 15, and clamping blocks 17 abut against both the upper and lower sides of the blank 1. In this embodiment, there are two clamping blocks 17, one upper and one lower, which clamp the upper and lower sides of the connecting seat 6 respectively. The bottom surface 13 is the outer surface of the base plate 4, and the cavity surface 14 faces all surfaces of the cavity shell 5. The zero-position plate 16 is connected to the clamping seat of the horizontal machining center, which performs semi-finish machining on all surfaces of the bottom surface 13 and cavity surface 14 of the blank 1.

[0037] S5, semi-finish machining of the reverse side of cavity surface 14 of blank 1; blank 1 is clamped on a reverse fixture, which includes a mounting plate 18 and a zero-point plate 19. The front end face of blank 1 abuts against the surface of mounting plate 18, and the blank 1 and mounting plate 18 are fastened together with screws. Mounting plate 18 is fastened to zero-point plate 19. The reverse side of cavity surface 14 of blank 1 is all surfaces facing away from cavity shell 5. Zero-point plate 19 is connected to the clamping seat of a horizontal machining center, which performs semi-finish machining on all surfaces of the reverse side of cavity surface 14 of blank 1. After removing blank 1, it is left to stand for a period of time to release the stress and deformation of semi-finish machining. In this embodiment, blank 1 is left to stand for 24 hours after removal.

[0038] S6, repeat S3.

[0039] S7, finish machining the bottom surface 13 and the cavity surface 14; during machining, the blank 1 is clamped on the front fixture, which includes a connecting plate 15 and a zero-position plate 16. The reference surface 2 of the blank 1 abuts against the surface of the connecting plate 15, and the blank 1 and the connecting plate 15 are fastened together with screws. The connecting plate 15 is fastened to the zero-position plate 16. Several clamping blocks 17 are fastened to the connecting plate 15, and clamping blocks 17 abut against both the upper and lower sides of the blank 1. In this embodiment, there are two clamping blocks 17, one upper and one lower, which clamp the upper and lower sides of the connecting seat 6 respectively. The bottom surface 13 is the outer surface of the bottom plate 4, and the cavity surface 14 faces all surfaces of the cavity shell 5. The zero-position plate 16 is connected to the clamping seat of the horizontal machining center, which performs finish machining on all surfaces of the bottom surface 13 and the cavity surface 14 of the blank 1.

[0040] S8, finish machining the reverse side of cavity surface 14 of blank 1; blank 1 is clamped on a reverse jig, which includes a mounting plate 18 and a zero-point plate 19. The front end face of blank 1 abuts against the surface of mounting plate 18, and blank 1 and mounting plate 18 are fastened together with screws. Mounting plate 18 is fastened to zero-point plate 19. The reverse side of cavity surface 14 of blank 1 consists of all surfaces facing away from cavity shell 5. Zero-point plate 19 is connected to the clamping seat of a horizontal machining center, which performs finish machining on all surfaces of the reverse side of cavity surface 14 of blank 1.

[0041] S9, finish machining the reverse side of bottom surface 13; the reverse side of bottom surface 13 is the inner surface of base plate 4. The base plate 4 of blank 1 is connected to transition plate 3, and then transition plate 3 is connected to vertical machine tool, and vertical machine tool performs finish machining on the reverse side of bottom surface 13 of blank 1.

[0042] S10, Machining the undercut feature inside the cavity of the blank 1. The reference surface 2 of the blank 1 abuts against the surface of the transition plate 3. The blank 1 and the transition plate 3 are fastened together with screws. Then the transition plate 3 is connected to the vertical machine tool, and the vertical machine tool performs machining on the undercut feature inside the cavity of the blank 1.

[0043] During the machining of irregularly shaped thin-walled parts, stress relief is achieved through heat treatment after roughing. When machining datum surface 2, the blank 1 is glued to transition plate 3, ensuring reliable positioning and preventing deformation of the irregularly shaped thin-walled blank 1. Semi-finishing is performed first, followed by finishing, to guarantee machining accuracy. Furthermore, datum surface 2 is machined both before semi-finishing and finishing, resulting in even greater precision and ensuring machining quality.

[0044] Example 2: A processing technology for an irregularly shaped thin-walled part (see appendix) Figure 1 Appendix Figure 3 Appendix Figure 4 Appendix Figure 5The process includes the following steps: S1, roughing the blank to form a blank 1; in S1, the blank is roughed but a 2.5-3.5mm allowance is reserved on the surface. In this embodiment, the blank is roughed but a 3mm allowance is reserved on the surface. The entire roughing process is carried out on a CNC lathe, and the process holes are processed during the roughing process.

[0045] S2, Heat treatment of blank 1; S2 Heat treatment temperature of blank 1 is 195-205℃, time is 9-11 hours, and natural cooling is performed. In this embodiment, blank 1 is loaded into a heat treatment furnace for heat treatment at a temperature of 200℃ for 10 hours to remove the stress generated during roughing.

[0046] S3. A reference surface 2 is machined on the blank 1. During machining, the blank 1 is glued to the transition plate 3. The blank 1 includes a base plate 4 and a cavity shell 5. A connecting seat 6 is provided between the base plate 4 and the cavity shell 5. The base plate 4 is glued to the transition plate 3, and the reference surface 2 is set on the outer bottom surface 13 of the cavity shell 5. A through groove 7 is provided on the surface of the base plate 4. A positioning block is installed on the transition plate 3, and the positioning block is fitted into the through groove 7. A shaping plate 8 is provided below the cavity shell 5. A shaping column 9 is fitted inside the cavity shell 5 and supported between the shaping plate 8 and the bottom of the cavity shell 5. The shaping column 9 is a rigid column, and the shaping plate 8 is fixedly connected to the transition plate 3. Before machining the reference surface 2, hot melt adhesive is applied between the base plate 4 and the transition plate 3 of the blank 1. Then, the base plate 4 and the transition plate 3 are glued together. The positioning block on the transition plate 3 is fitted into the through groove 7 to achieve precise positioning. Three through slots 7 are provided on the base plate 4. The middle through slot 7 communicates with the cavity shell 5, and the through slots 7 on both sides extend into the connecting seat 6. The shaping column 9 is installed into the cavity shell 5, so that the shaping column 9 is supported between the shaping plate 8 and the bottom of the cavity shell 5. The transition plate 3 is fastened to the clamping seat of the vertical machine tool. The clamping seat is equipped with a zero-point fixture, and the transition plate 3 is connected to the zero-point fixture. The flatness of the datum surface 2 after machining is within 0.02. During the machining of the datum surface 2, the shaping column 9 is inserted into the cavity shell 5 to shape the cavity shell 5 and prevent the irregular thin-walled blank 1 from deforming during the machining process.

[0047] S4, semi-finish machining of the bottom surface 13 and cavity surface 14 of the blank 1; during machining, the blank 1 is clamped on the front fixture, which includes a connecting plate 15 and a zero-position plate 16. The reference surface 2 of the blank 1 abuts against the surface of the connecting plate 15, and the blank 1 and the connecting plate 15 are fastened together with screws. The connecting plate 15 is fastened to the zero-position plate 16. Several clamping blocks 17 are fastened to the connecting plate 15, and clamping blocks 17 abut against both the upper and lower sides of the blank 1. In this embodiment, there are two clamping blocks 17, one upper and one lower, which clamp the upper and lower sides of the connecting seat 6 respectively. The bottom surface 13 is the outer surface of the base plate 4, and the cavity surface 14 faces all surfaces of the cavity shell 5. The zero-position plate 16 is connected to the clamping seat of the horizontal machining center, which performs semi-finish machining on all surfaces of the bottom surface 13 and cavity surface 14 of the blank 1.

[0048] S5, semi-finish machining of the reverse side of cavity surface 14 of blank 1; blank 1 is clamped on a reverse fixture, which includes a mounting plate 18 and a zero-point plate 19. The front end face of blank 1 abuts against the surface of mounting plate 18, and the blank 1 and mounting plate 18 are fastened together with screws. Mounting plate 18 is fastened to zero-point plate 19. The reverse side of cavity surface 14 of blank 1 is all surfaces facing away from cavity shell 5. Zero-point plate 19 is connected to the clamping seat of a horizontal machining center, which performs semi-finish machining on all surfaces of the reverse side of cavity surface 14 of blank 1. After removing blank 1, it is left to stand for a period of time to release the stress and deformation of semi-finish machining. In this embodiment, blank 1 is left to stand for 24 hours after removal.

[0049] S6, repeat S3.

[0050] S7, finish machining the bottom surface 13 and the cavity surface 14; during machining, the blank 1 is clamped on the front fixture, which includes a connecting plate 15 and a zero-position plate 16. The reference surface 2 of the blank 1 abuts against the surface of the connecting plate 15, and the blank 1 and the connecting plate 15 are fastened together with screws. The connecting plate 15 is fastened to the zero-position plate 16. Several clamping blocks 17 are fastened to the connecting plate 15, and clamping blocks 17 abut against both the upper and lower sides of the blank 1. In this embodiment, there are two clamping blocks 17, one upper and one lower, which clamp the upper and lower sides of the connecting seat 6 respectively. The bottom surface 13 is the outer surface of the bottom plate 4, and the cavity surface 14 faces all surfaces of the cavity shell 5. The zero-position plate 16 is connected to the clamping seat of the horizontal machining center, which performs finish machining on all surfaces of the bottom surface 13 and the cavity surface 14 of the blank 1.

[0051] S8, finish machining the reverse side of cavity surface 14 of blank 1; blank 1 is clamped on a reverse jig, which includes a mounting plate 18 and a zero-point plate 19. The front end face of blank 1 abuts against the surface of mounting plate 18, and blank 1 and mounting plate 18 are fastened together with screws. Mounting plate 18 is fastened to zero-point plate 19. The reverse side of cavity surface 14 of blank 1 consists of all surfaces facing away from cavity shell 5. Zero-point plate 19 is connected to the clamping seat of a horizontal machining center, which performs finish machining on all surfaces of the reverse side of cavity surface 14 of blank 1.

[0052] S9, finish machining the reverse side of bottom surface 13; the reverse side of bottom surface 13 is the inner surface of base plate 4. The base plate 4 of blank 1 is connected to transition plate 3, and then transition plate 3 is connected to vertical machine tool, and vertical machine tool performs finish machining on the reverse side of bottom surface 13 of blank 1.

[0053] S10, Machining the undercut feature inside the cavity of the blank 1. The reference surface 2 of the blank 1 abuts against the surface of the transition plate 3. The blank 1 and the transition plate 3 are fastened together with screws. Then the transition plate 3 is connected to the vertical machine tool, and the vertical machine tool performs machining on the undercut feature inside the cavity of the blank 1.

[0054] During the machining of irregularly shaped thin-walled parts, stress relief is achieved through heat treatment after roughing. When machining datum surface 2, the blank 1 is glued to transition plate 3, ensuring reliable positioning and preventing deformation of the irregularly shaped thin-walled blank 1. Semi-finishing is performed first, followed by finishing, to guarantee machining accuracy. Furthermore, datum surface 2 is machined both before semi-finishing and finishing, resulting in even greater precision and ensuring machining quality.

[0055] Example 3: A processing technology for an irregularly shaped thin-walled part (see appendix) Figure 1 Appendix Figure 3 Appendix Figure 4 Appendix Figure 6 The process includes the following steps: S1, roughing the blank to form a blank 1; in S1, the blank is roughed but a 2.5-3.5mm allowance is reserved on the surface. In this embodiment, the blank is roughed but a 3mm allowance is reserved on the surface. The entire roughing process is carried out on a CNC lathe, and the process holes are processed during the roughing process.

[0056] S2, Heat treatment of blank 1; S2 Heat treatment temperature of blank 1 is 195-205℃, time is 9-11 hours, and natural cooling is performed. In this embodiment, blank 1 is loaded into a heat treatment furnace for heat treatment at a temperature of 200℃ for 10 hours to remove the stress generated during roughing.

[0057] S3, a reference surface 2 is machined on the blank 1. During machining, the blank 1 is glued to the transition plate 3. The blank 1 includes a base plate 4 and a cavity shell 5. A connecting seat 6 is provided between the base plate 4 and the cavity shell 5. The base plate 4 is glued to the transition plate 3. The reference surface 2 is set on the outer bottom surface 13 of the cavity shell 5. A through groove 7 is provided on the surface of the base plate 4. A positioning block is installed on the transition plate 3. The positioning block is fitted into the through groove 7. A shaping plate 8 is provided below the cavity shell 5. A shaping column 9 is fitted inside the cavity shell 5. The shaping column 9 is supported between the shaping plate 8 and the bottom of the cavity shell 5. The shaping plate 8 is fixedly connected to the transition plate 3. The shaping column 9 includes a skeleton and a filler 10. The skeleton includes a support plate 11 and several support rods 12. One end of the support rod 12 is connected to the support plate 11, and the other end of the support rod 12 abuts against the bottom of the cavity shell 5. The filler 10 is made of putty or hot melt adhesive and can fill the interior of the cavity shell 5. Before machining the datum surface 2, hot melt adhesive is applied between the base plate 4 and the transition plate 3 of the blank 1. The base plate 4 and the transition plate 3 are then glued together. The positioning block on the transition plate 3 is inserted into the corresponding through slot 7 for precise positioning. Three through slots 7 are provided on the base plate 4; the middle through slot 7 communicates with the cavity shell 5, and the two through slots on both sides extend into the connecting seat 6. A filler 10 is inserted into the cavity shell 5, and a skeleton is inserted into the cavity shell 5, thus forming a shaping column 9 within the cavity shell 5. The shaping column 9 is supported between the shaping plate 8 and the bottom of the cavity shell 5. The transition plate 3 is securely connected to the clamping seat of the vertical machine tool. A zero-point fixture is provided on the clamping seat, and the transition plate 3 is connected to the zero-point fixture. After machining, the flatness of the datum surface 2 is within 0.02. During the machining of the datum surface 2, the shaping column 9 is inserted into the cavity shell 5 to shape the cavity shell 5, preventing deformation of the irregularly shaped thin-walled blank 1 during machining. The shaping column 9 consists of a skeleton and a filler 10. The filler 10 is flexible and deformable, thus filling all positions inside the cavity shell 5. It has a good shaping effect on the cavity shell 5 and the blank part 1 is not easily deformed during processing.

[0058] S4, semi-finish machining of the bottom surface 13 and cavity surface 14 of the blank 1; during machining, the blank 1 is clamped on the front fixture, which includes a connecting plate 15 and a zero-position plate 16. The reference surface 2 of the blank 1 abuts against the surface of the connecting plate 15, and the blank 1 and the connecting plate 15 are fastened together with screws. The connecting plate 15 is fastened to the zero-position plate 16. Several clamping blocks 17 are fastened to the connecting plate 15, and clamping blocks 17 abut against both the upper and lower sides of the blank 1. In this embodiment, there are two clamping blocks 17, one upper and one lower, which clamp the upper and lower sides of the connecting seat 6 respectively. The bottom surface 13 is the outer surface of the base plate 4, and the cavity surface 14 faces all surfaces of the cavity shell 5. The zero-position plate 16 is connected to the clamping seat of the horizontal machining center, which performs semi-finish machining on all surfaces of the bottom surface 13 and cavity surface 14 of the blank 1.

[0059] S5, semi-finish machining of the reverse side of cavity surface 14 of blank 1; blank 1 is clamped on a reverse fixture, which includes a mounting plate 18 and a zero-point plate 19. The front end face of blank 1 abuts against the surface of mounting plate 18, and the blank 1 and mounting plate 18 are fastened together with screws. Mounting plate 18 is fastened to zero-point plate 19. The reverse side of cavity surface 14 of blank 1 is all surfaces facing away from cavity shell 5. Zero-point plate 19 is connected to the clamping seat of a horizontal machining center, which performs semi-finish machining on all surfaces of the reverse side of cavity surface 14 of blank 1. After removing blank 1, it is left to stand for a period of time to release the stress and deformation of semi-finish machining. In this embodiment, blank 1 is left to stand for 24 hours after removal.

[0060] S6, repeat S3.

[0061] S7, finish machining the bottom surface 13 and the cavity surface 14; during machining, the blank 1 is clamped on the front fixture, which includes a connecting plate 15 and a zero-position plate 16. The reference surface 2 of the blank 1 abuts against the surface of the connecting plate 15, and the blank 1 and the connecting plate 15 are fastened together with screws. The connecting plate 15 is fastened to the zero-position plate 16. Several clamping blocks 17 are fastened to the connecting plate 15, and clamping blocks 17 abut against both the upper and lower sides of the blank 1. In this embodiment, there are two clamping blocks 17, one upper and one lower, which clamp the upper and lower sides of the connecting seat 6 respectively. The bottom surface 13 is the outer surface of the bottom plate 4, and the cavity surface 14 faces all surfaces of the cavity shell 5. The zero-position plate 16 is connected to the clamping seat of the horizontal machining center, which performs finish machining on all surfaces of the bottom surface 13 and the cavity surface 14 of the blank 1.

[0062] S8, finish machining the reverse side of cavity surface 14 of blank 1; blank 1 is clamped on a reverse jig, which includes a mounting plate 18 and a zero-point plate 19. The front end face of blank 1 abuts against the surface of mounting plate 18, and blank 1 and mounting plate 18 are fastened together with screws. Mounting plate 18 is fastened to zero-point plate 19. The reverse side of cavity surface 14 of blank 1 consists of all surfaces facing away from cavity shell 5. Zero-point plate 19 is connected to the clamping seat of a horizontal machining center, which performs finish machining on all surfaces of the reverse side of cavity surface 14 of blank 1.

[0063] S9, finish machining the reverse side of bottom surface 13; the reverse side of bottom surface 13 is the inner surface of base plate 4. The base plate 4 of blank 1 is connected to transition plate 3, and then transition plate 3 is connected to vertical machine tool, and vertical machine tool performs finish machining on the reverse side of bottom surface 13 of blank 1.

[0064] S10, Machining the undercut feature inside the cavity of the blank 1. The reference surface 2 of the blank 1 abuts against the surface of the transition plate 3. The blank 1 and the transition plate 3 are fastened together with screws. Then the transition plate 3 is connected to the vertical machine tool, and the vertical machine tool performs machining on the undercut feature inside the cavity of the blank 1.

[0065] During the machining of irregularly shaped thin-walled parts, stress relief is achieved through heat treatment after roughing. When machining datum surface 2, the blank 1 is glued to transition plate 3, ensuring reliable positioning and preventing deformation of the irregularly shaped thin-walled blank 1. Semi-finishing is performed first, followed by finishing, to guarantee machining accuracy. Furthermore, datum surface 2 is machined both before semi-finishing and finishing, resulting in even greater precision and ensuring machining quality.

[0066] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications may be made without departing from the technical solutions described in the claims.

Claims

1. A processing technology for irregularly shaped thin-walled parts, characterized in that, Includes the following steps: S1. Roughing of the blank to form a rough part is performed on a CNC lathe, completing the machining of process holes, with a 2.5-3.5mm allowance left on the surface; S2. Heat treatment of the rough part at 195-205℃ for 9-11 hours, followed by natural cooling; S3. Machining a reference surface on the rough part. During machining, the rough part is glued to a transition plate. The rough part includes a base plate and a cavity shell, with a connecting seat between the base plate and the cavity shell. The base plate is glued to the transition plate, and the reference surface is set on the outer bottom surface of the cavity shell. A through groove is set on the surface of the base plate, and a positioning block is installed on the transition plate. The base plate and the transition plate are glued together with hot melt adhesive. The positioning block and... S4, semi-finished machining of the bottom and cavity surfaces of the blank; S5, semi-finished machining of the reverse side of the cavity surface of the blank; S6, repeat S3; S7, finished machining of the bottom and cavity surfaces; S8, finished machining of the reverse side of the cavity surface of the blank; S9, finished machining of the reverse side of the bottom surface, the bottom plate of the blank is connected to the transition plate, the transition plate is connected to the vertical machine tool for finished machining of the reverse side of the bottom surface of the blank; S10, machining the undercut feature inside the cavity of the blank, the reference surface of the blank abuts against the surface of the transition plate, the blank and the transition plate are fastened with screws, the transition plate is connected to the vertical machine tool for machining the undercut feature inside the cavity of the blank. In S4 and S7, the blank is clamped on the front fixture, which includes a connecting plate and a zero-position plate. The reference surface of the blank is abutted against the surface of the connecting plate, and the blank and the connecting plate are fastened together with screws. The connecting plate is fastened to the zero-position plate. In S5 and S8, the blank is clamped on the reverse fixture, which includes a mounting plate and a zero point plate. The front end face of the blank abuts against the surface of the mounting plate, and the blank and the mounting plate are fastened together with screws. The mounting plate is fastened to the zero point plate.

2. The processing technology for a non-circular thin-walled part according to claim 1, characterized in that, In S1, the blank is roughened but a 3mm allowance is reserved on the surface.

3. The processing technology for a non-circular thin-walled part according to claim 1, characterized in that, The blank is loaded into a heat treatment furnace for heat treatment at a temperature of 200℃ for 10 hours.

4. The processing technology for a non-circular thin-walled part according to claim 1, characterized in that, The flatness of the reference surface after machining is within 0.

02.

5. The processing technology for an irregularly shaped thin-walled part according to claim 1, characterized in that, Three through slots are provided on the base plate. The middle through slot is connected to the cavity shell, and the through slots on both sides extend into the connecting seat.

6. The processing technology for an irregularly shaped thin-walled part according to claim 1, characterized in that, A shaping plate is installed below the cavity shell, and a shaping column is adapted to be loaded inside the cavity shell. The shaping column is supported between the shaping plate and the bottom of the cavity shell.

7. The processing technology for a non-circular thin-walled part according to claim 1, characterized in that, Several clamping blocks are fastened to the connecting plate, and clamping blocks are attached to both the upper and lower sides of the blank.

8. The processing technology for a non-circular thin-walled part according to any one of claims 1 to 7, characterized in that, After S5, remove the blank and let it stand for a period of time to release the semi-finishing stress and deformation.

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