Method for interrupted cutting of thin-walled parts

Abstract

The application discloses a kind of intermittent cutting machining methods of thin-walled parts, to provide a kind of intermittent cutting machining methods of thin-walled parts, practicality is strong, it is easy, fast, can effectively reduce the vibration generated when intermittent cutting, to improve the machining precision of thin-walled part and be favorable to improve efficiency.It includes the following steps: A, roughing of thin-walled part blank, thin-walled part blank includes thin-walled cylinder, square plate at one end of thin-walled cylinder and annular plate at the other end of thin-walled cylinder;B, thin-walled part blank is placed into heat treatment furnace and is heat treated, to remove the stress generated by roughing;C, thin-walled part blank is installed on tooling, semi-finishing is carried out to thin-walled part blank, and semi-finished product of thin-walled part is obtained;D, semi-finished product of thin-walled part is installed on tooling, finishing is carried out to semi-finished product of thin-walled part, and finished product of thin-walled part is obtained.

Description

Technical Field

[0001] This invention relates to the field of intermittent cutting technology, and more specifically to an intermittent cutting method for thin-walled parts. Background Technology

[0002] Intermittent cutting is a cutting method in which the cutting edge makes intermittent contact with the workpiece during the cutting process. For example, it involves dividing the product machining process into multiple stages. Intermittent cutting is characterized by instability, such as vibration. Thin-walled parts, due to their thin walls, have poor rigidity, and intermittent cutting easily causes vibration and deformation, affecting the machining accuracy and surface finish of thin-walled parts, thus reducing machining quality. Furthermore, cutting parameters are limited during cutting, resulting in low production efficiency.

[0003] For example, Chinese Patent Publication No. CN103949864A, entitled "A Method for Processing Blades with Intermittent Cutting," describes a method that involves covering an impeller with a filler material such as plaster or clay. After the filler material solidifies, the outer edge of the blade is cut. The filler material is then removed to obtain an impeller with the desired blade outer edge profile. While this method can effectively reduce blade vibration and deformation during intermittent cutting, the use of plaster or clay to cover the impeller is inconvenient and inefficient. Furthermore, the vibration during intermittent cutting can easily cause the filler material to detach. Summary of the Invention

[0004] The purpose of this invention is to provide a practical, convenient, and quick method for intermittent cutting of thin-walled parts, which can effectively reduce vibrations generated during intermittent cutting, thereby improving the machining accuracy and efficiency of thin-walled parts.

[0005] The technical solution of this invention is: A method for intermittent machining of thin-walled parts includes the following steps: A. Roughing of thin-walled part blank: The thin-walled part blank includes a thin-walled cylinder, a square plate at one end of the thin-walled cylinder, and an annular plate at the other end of the thin-walled cylinder. B. The thin-walled blank is placed in a heat treatment furnace for heat treatment to remove the stress generated during roughing. C. Install the thin-walled blank on the tooling and perform semi-finishing on the thin-walled blank to obtain the thin-walled semi-finished product. D. The thin-walled semi-finished part is mounted on a tooling fixture and then finished to obtain the finished thin-walled part. In this method of intermittent cutting of thin-walled parts, the stress generated during roughing is removed through heat treatment in step B; in the semi-finishing step C and the finishing step D, tooling is used for positioning and support, thereby effectively reducing the vibration generated during intermittent cutting and improving the machining accuracy of the thin-walled part; at the same time, the setting of cutting parameters, such as the speed of the tool or the thin-walled part, can be improved, which is conducive to improving the machining efficiency of the thin-walled part. On the other hand, the use of tooling for positioning and supporting the thin-walled part is highly practical and convenient and quick to operate.

[0006] As a preferred option, the specific steps of step C are as follows. C1 involves machining the inner diameter of the thin-walled cylinder and the annular plate, the annular groove on the annular plate, and one end face of the square plate and the annular plate. Since the inner and outer diameters of the thin-walled cylinder are not machined in step C1, the wall thickness of the cylinder still has sufficient strength to withstand intermittent cutting conditions. The vibration generated during intermittent cutting is minimal. Therefore, step C1 eliminates the need for tooling installation and positioning without affecting the machining accuracy of the inner diameter of the thin-walled cylinder and the annular plate, the annular groove on the annular plate, and one end face of the square plate and the annular plate, thus improving work efficiency.

[0007] In step C2, the thin-walled blank is mounted on a first fixture, which includes a first cylinder. The thin-walled cylinder is positioned outside the first cylinder. Next, the outer diameter of the thin-walled cylinder and the other end faces of the square plate and the annular plate are machined. In step C2, since the inner and outer surfaces of the thin-walled cylinder are machined, its wall thickness is relatively thin. Therefore, the first cylinder of the first fixture is used to position and support the thin-walled cylinder, thereby effectively reducing the vibration generated during intermittent cutting and improving the machining accuracy of the outer diameter of the thin-walled cylinder and the other end faces of the square plate and the annular plate. At the same time, the setting of cutting parameters, such as the speed of the tool or the thin-walled part, can be improved, which is conducive to improving the machining efficiency of the thin-walled part.

[0008] In step C3, the thin-walled blank is mounted on a second fixture, which includes a locating hole with several circumferentially evenly distributed bottom holes on its bottom surface. The thin-walled cylinder is positioned within the locating hole, and an annular plate is supported on the bottom surface of the locating hole. Next, the annular holes on the annular plate are machined, with each hole corresponding to a bottom hole. Then, at least one locating pin is inserted into one of the annular holes and its corresponding bottom hole. Following this, the square holes and slots on the square plate are machined. Because the inner and outer diameters of the thin-walled cylinder are machined in step C3, and the cylinder is now quite thin, the locating hole of the second fixture is used to position and support it. This effectively reduces vibrations generated during intermittent cutting and improves the machining accuracy of the square holes and slots on the square plate. Simultaneously, it allows for better setting of cutting parameters, such as the speed of the tool or the thin-walled part, thus improving the machining efficiency of the thin-walled part.

[0009] In step C4, the thin-walled blank is mounted on the third fixture, and the notches on the annular plate are machined. Similarly, since the inner and outer diameters of the thin-walled cylinder are machined in step C4, and the cylinder is relatively thin, the third fixture is used to position and support it. This effectively reduces vibrations generated during intermittent cutting and improves the machining accuracy of the notches on the annular plate. At the same time, it allows for better setting of cutting parameters, such as the speed of the tool or the thin-walled part, thereby improving the machining efficiency of the thin-walled part.

[0010] Preferably, the third tooling includes a third cylinder and a third end plate located at the bottom of the third cylinder. The third end plate has a pin hole, and the top surface of the third cylinder has several circumferentially evenly distributed clearance openings, each corresponding to a notch. The thin-walled cylindrical part of the blank is positioned on the third cylinder, the annular plate is supported on the top surface of the third cylinder, and the square plate is supported on the third end plate. At least one locating pin is inserted into the hole in the square plate and the pin hole, thereby mounting the thin-walled blank on the third tooling. Thus, in step C4, the third cylinder of the third tooling can be used to position and support the thin-walled cylinder, effectively reducing vibrations generated during intermittent cutting and improving the machining accuracy of the notches on the annular plate.

[0011] As a preferred option, in step C1, a CNC vertical lathe is used to machine the outer diameter of the thin-walled cylinder and the other end face of the square plate and the annular plate. In step C2, a CNC vertical lathe is used to machine the outer diameter of the thin-walled cylinder and the other end face of the square plate and the annular plate.

[0012] As a preferred option, in step C3, a CNC machining center is used to process each annular plate hole, each square plate hole and groove. In step C4, a CNC machining center is used to process the notches on the annular plate.

[0013] Preferably, step D includes the following steps: D1. Fix the thin-walled semi-finished product on the worktable of the CNC machining center. Then, finish machine the side wall holes and grooves on the side wall of the thin-walled cylinder.

[0014] Preferably, the following steps are included after step D1: In step D2, the thin-walled semi-finished product is fixedly installed on the second tooling. The thin-walled cylinder of the semi-finished product is positioned in the positioning hole of the second tooling, and at least one positioning pin is inserted into one of the holes in the annular plate and the corresponding bottom hole. Then, the inner diameter of the thin-walled cylinder and the annular plate, the annular groove on the annular plate, and one end face of the square plate and the annular plate are finished. In step D2, because the thin-walled cylinder is relatively thin, the positioning hole of the second tooling is used to position and support the thin-walled cylinder, thereby effectively reducing the vibration generated during intermittent cutting and improving the finishing accuracy of the inner diameter of the thin-walled cylinder and the annular plate, the annular groove on the annular plate, and one end face of the square plate and the annular plate.

[0015] In step D3, the thin-walled semi-finished part is fixedly mounted on the fourth fixture. The fourth fixture includes a fourth cylinder and a fourth end plate located at the bottom of the fourth cylinder. The fourth end plate has pin holes. The thin-walled cylinder is positioned outside the fourth cylinder, and the square plate is supported on the fourth end plate. At least one locating pin is inserted into the hole in the square plate and the pin hole in the fourth end plate. Next, the outer diameter of the thin-walled cylinder and the other end faces of the square plate and the annular plate are finished. Similarly, in step D3, the fourth cylinder of the fourth fixture is used to position and support the thin-walled cylinder, thereby effectively reducing the vibration generated during intermittent cutting and improving the machining accuracy of the outer diameter of the thin-walled cylinder and the other end faces of the square plate and the annular plate.

[0016] As a preferred option, in step D2, a CNC vertical lathe is used to precision machine the outer diameter of the thin-walled cylinder and one end face of the square plate and the annular plate. In step D3, a CNC vertical lathe is used to precision machine the outer diameter of the thin-walled cylinder and the other end face of the square plate and the annular plate.

[0017] Preferably, the following steps are included after step D3: In step D4, the thin-walled semi-finished part is fixedly installed on the second tooling. The thin-walled cylinder is positioned in the positioning hole, and the annular plate is supported on the bottom surface of the positioning hole. At least one positioning pin is inserted into one of the annular plate holes and the corresponding bottom hole. Next, the square holes and grooves on the square plate are finished. Similarly, in step D4, the positioning hole of the second tooling is used to position and support the thin-walled cylinder, thereby effectively reducing the vibration generated during intermittent cutting and improving the machining accuracy of the square holes and grooves on the square plate.

[0018] Preferably, the following steps are included after step D4: In step D5, the thin-walled semi-finished product is fixedly mounted on the third tooling, and the notches on the annular plate are finished. Similarly, in step D5, the third tooling is used to position and support the thin-walled cylinder, thereby effectively reducing the vibration generated during intermittent cutting and improving the machining accuracy of the notches on the annular plate.

[0019] The beneficial effects of this invention are: Firstly, tooling is used to position and support thin-walled parts during semi-finishing and finishing, thereby effectively reducing vibrations generated during intermittent cutting and improving the machining accuracy of thin-walled parts. At the same time, the setting of cutting parameters, such as the speed of the tool or the thin-walled part, can be improved, which is conducive to improving the machining efficiency of thin-walled parts.

[0020] Secondly, the tooling used in semi-finishing and finishing processes to position and support thin-walled parts is highly practical and easy and quick to operate. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a thin-walled blank after step A of the present invention.

[0022] Figure 2 This is a schematic diagram of a thin-walled blank after step C1 of the present invention.

[0023] Figure 3 This is a schematic diagram of the structure of a finished thin-walled part of the present invention.

[0024] Figure 4 This is a schematic diagram of the structure of the first tooling of the present invention.

[0025] Figure 5 This is a schematic diagram of the structure of the second tooling of the present invention.

[0026] Figure 6 This is a schematic diagram of the structure of the third tooling of the present invention.

[0027] Figure 7 This is a schematic diagram of the structure of the thin-walled blank of the present invention after it is installed on the first tooling.

[0028] Figure 8 This is a schematic diagram of a structure after the thin-walled blank of the present invention is installed on the second tooling.

[0029] In the picture: Thin-walled blank 1a, thin-walled finished product 1b, thin-walled cylinder 1.1, square plate 1.2, square plate hole 1.21, annular plate 1.3, annular groove 1.31, annular plate hole 1.32, notch 1.33; First tooling 2, first cylinder 2.1, first end plate 2.2; Second tooling 3, positioning round hole 3.1, base 3.2; Third tooling 4, third cylinder 4.1, third end plate 4.2, clearance opening 4.3. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Specific embodiment one, a method for intermittent cutting of thin-walled parts, includes the following steps: A, roughing of thin-walled part blank 1a. For example... Figure 1 As shown, the thin-walled blank 1a includes a thin-walled cylinder 1.1, a square plate 1.2 disposed at one end of the thin-walled cylinder 1.1, and an annular plate 1.3 disposed at the other end of the thin-walled cylinder 1.1, wherein the square plate 1.2 is disposed on the outer wall of one end of the thin-walled cylinder 1.1, and the annular plate 1.3 is disposed on the inner wall of the other end of the thin-walled cylinder 1.1.

[0031] B. The thin-walled blank 1a is placed in a heat treatment furnace for heat treatment to remove the stress generated during roughing. Specifically, the thin-walled blank 1a is placed in a heat treatment furnace with the temperature set at 180℃ and the heat treatment time set at 10 hours. Then, the thin-walled blank 1a is removed and allowed to cool naturally to room temperature. This effectively removes the stress generated during roughing, preparing the material for subsequent semi-finishing and finishing work, and improving machining accuracy.

[0032] The roughened product blank is placed in a heat treatment furnace and set to a temperature of 180℃ for 10 hours for natural cooling to remove the stress generated during roughing.

[0033] C. Mount the thin-walled blank 1a onto the tooling and perform semi-finishing on the thin-walled blank 1a to obtain the semi-finished thin-walled part. The specific steps are as follows. C1, such as Figure 2 As shown, the inner diameters of the thin-walled cylinder 1.1 and the annular plate 1.3, the annular groove 1.31 on the annular plate 1.3, and one end face of the square plate 1.2 and one end face of the annular plate 1.3 are machined. Specifically, the thin-walled blank 1a is directly fixedly mounted on the worktable of a CNC vertical lathe, and the outer diameter of the thin-walled cylinder 1.1 and the other end face of the square plate 1.2 and the annular plate 1.3 are machined using a CNC vertical lathe. Since the inner and outer diameters of the thin-walled cylinder 1.1 have not been machined in step C1, the wall thickness of the thin-walled cylinder 1.1 still has sufficient strength to adapt to the intermittent cutting conditions. The vibration generated during intermittent cutting is small. Therefore, in step C1, the installation and positioning of the tooling can be eliminated without affecting the machining accuracy of the inner diameters of the thin-walled cylinder 1.1 and the annular plate 1.3, the annular groove 1.31 on the annular plate 1.3, and one end face of the square plate 1.2 and the annular plate 1.3, thus improving work efficiency.

[0034] C2, such as Figure 2 , Figure 4 , Figure 7As shown, the thin-walled blank 1a is mounted on the first fixture 2. The first fixture 2 includes a first cylinder 2.1 and a first end plate 2.2 located at the lower end of the first cylinder 2.1. The outer diameter of the first cylinder 2.1 is adapted to the inner diameter of the thin-walled cylinder 1.1 after machining in step C1. The thin-walled cylinder 1.1 is positioned outside the first cylinder 2.1, the square plate 1.2 abuts against the first end plate 2.2, and the annular plate 1.3 abuts against the end face of the first cylinder 2.1; then, the outer diameter of the thin-walled cylinder 1.1 and the other end faces of the square plate 1.2 and the annular plate 1.3 are machined. Specifically, the first fixture 2 is fixed on the worktable of a CNC vertical lathe by the first end plate 2.2; then, the outer diameter of the thin-walled cylinder 1.1 and the other end faces of the square plate 1.2 and the annular plate 1.3 are machined using a CNC vertical lathe. In step C2, since the thin-walled cylinder 1.1 has a thin wall thickness due to the cutting process on both the inside and outside, the first cylinder 2.1 of the first tooling 2 is used to position and support the thin-walled cylinder 1.1, thereby effectively reducing the vibration generated during intermittent cutting and improving the machining accuracy of the outer diameter of the thin-walled cylinder 1.1, the square plate 1.2 and the other end face of the annular plate 1.3. At the same time, the setting of cutting parameters can be improved, such as the rotational speed of the tool or the thin-walled part, which is conducive to improving the machining efficiency of the thin-walled part.

[0035] C3, such as Figure 2 , Figure 5 , Figure 8 As shown, the thin-walled blank 1a is mounted on the second fixture 3. The second fixture 3 includes a positioning hole 3.1. Specifically, the second fixture 3 includes a base 3.2, and the positioning hole 3.1 is located in the middle of the top surface of the base 3.2. The inner diameter of the positioning hole 3.1 is adapted to the outer diameter of the thin-walled cylinder 1.1 after processing in step C2. The bottom surface of the positioning hole 3.1 is provided with a plurality of circumferentially evenly distributed bottom holes. In this embodiment, there are 8 bottom holes. The thin-walled cylinder 1.1 is positioned in the positioning hole 3.1, and the annular plate 1.3 is supported on the bottom surface of the positioning hole 3.1. The square plate 1.2 abuts against the top surface of the base 3.2. Next, the annular holes 1.32 on the annular plate 1.3 are machined, with each annular hole 1.32 corresponding to a bottom hole. Specifically, the base 3.2 is fixed on the worktable of the CNC machining center, and the annular holes 1.32 on the annular plate 1.3 are machined using the CNC machining center. Then, at least one locating pin is inserted into one of the annular holes 1.32 and its corresponding bottom hole. Next, the square holes 1.21 and grooves on the square plate 1.2 are machined using the CNC machining center. Since the inner and outer diameters of the thin-walled cylinder 1.1 are machined in step C3, and the thin-walled cylinder 1.1 is relatively thin, the locating holes 3.1 of the second tooling 3 are used to position and support the thin-walled cylinder 1.1, thereby effectively reducing vibrations generated during intermittent cutting and improving the machining accuracy of the square holes 1.21 and grooves on the square plate 1.2. Simultaneously, the cutting parameters can be set more precisely, such as the speed of the tool or the thin-walled part, thus improving the machining efficiency of the thin-walled part.

[0036] C4, such as Figure 2 , Figure 3 , Figure 6 As shown, the thin-walled blank 1a is mounted on the third tooling 4, and the notches 1.33 on the annular plate 1.3 are machined. In this embodiment, there are eight notches 1.33, which are evenly distributed around the circumference of the annular plate 1.3, and the notches 1.33 and the holes 1.32 of the annular plate are alternately distributed. Specifically, the third tooling 4 includes a third cylinder 4.1 and a third end plate 4.2 located at the lower end of the third cylinder 4.1. The third end plate 4.2 has at least one pin hole. In this embodiment, the third end plate 4.2 has four pin holes, which correspond to the four square plate holes 1.21 on the square plate 1.2. The top surface of the third cylinder 4.1 has several circumferentially evenly distributed clearance openings 4.3, which correspond one-to-one with the notches 1.33. The thin-walled cylindrical part 1.1 of the thin-walled blank 1a is positioned on the third cylinder 4.1, the annular plate 1.3 is supported on the top surface of the third cylinder 4.1, and the square plate 1.2 is supported on the third end plate 4.2. At least one locating pin is inserted into the hole 1.21 of the square plate and the pin hole to install the thin-walled blank 1a on the third fixture 4. Then, the third fixture 4 is fixedly installed on the worktable of the CNC machining center through the third end plate 4.3, and then the notches 1.33 on the annular plate 1.3 are machined by the CNC machining center. Similarly, since the inner and outer diameters of the thin-walled cylinder 1.1 are machined in step C4, and the thin-walled cylinder 1.1 is relatively thin at this time, the third tooling 4 is used to position and support the thin-walled cylinder 1.1, thereby effectively reducing the vibration generated during intermittent cutting and improving the machining accuracy of the notches 1.33 on the annular plate 1.3; at the same time, the setting of cutting parameters can be improved, such as the rotational speed of the tool or the thin-walled part, which is conducive to improving the machining efficiency of the thin-walled part.

[0037] D. Install the thin-walled semi-finished part onto the tooling and perform finishing on the semi-finished part to obtain the finished thin-walled part 1b. The specific steps are as follows. D1. Fix the thin-walled semi-finished product on the worktable of the CNC machining center. Then, finish machine the side wall holes and grooves on the side wall of the thin-walled cylinder 1.1.

[0038] D2. The thin-walled semi-finished product is fixedly installed on the second tooling 3. The thin-walled cylinder 1.1 of the thin-walled semi-finished product is positioned in the positioning hole 3.1 of the second tooling 3, and the annular plate 1.3 is supported on the bottom surface of the positioning hole 3.1. The square plate 1.2 abuts against the top surface of the base 3.2. At least one positioning pin is inserted into one of the annular plate holes 1.32 and the corresponding bottom hole. Then, the inner diameter of the thin-walled cylinder 1.1 and the annular plate 1.3, the annular groove 1.31 on the annular plate 1.3, and one end face of the square plate 1.2 and one end face of the annular plate 1.3 are finished. Specifically, the base 3.2 of the second tooling 3 is fixedly installed on the worktable of the CNC vertical lathe, and the outer diameter of the thin-walled cylinder 1.1, one end face of the square plate 1.2, and one end face of the annular plate 1.3 are finished using the CNC vertical lathe. In step D2, due to the thinness of the thin-walled cylinder 1.1, the positioning hole 3.1 of the second tooling 3 is used to position and support the thin-walled cylinder 1.1, thereby effectively reducing the vibration generated during intermittent cutting and improving the machining accuracy of the inner diameter of the thin-walled cylinder 1.1 and the annular plate 1.3, the annular groove 1.31 on the annular plate 1.3, and the finishing of one end face of the square plate 1.2 and the annular plate 1.3.

[0039] D3. The thin-walled semi-finished product is fixedly installed on the fourth tooling, which includes a fourth cylinder and a fourth end plate located at the bottom of the fourth cylinder. The fourth end plate has at least one pin hole. In this embodiment, the fourth end plate has four pin holes, which correspond to the four square plate holes 1.21 on the square plate 1.2. The thin-walled cylinder 1.1 is positioned outside the fourth cylinder, and the square plate 1.2 is supported on the fourth end plate. At least one positioning pin is inserted into the square plate hole 1.21 and the pin hole of the fourth end plate. Next, the outer diameter of the thin-walled cylinder 1.1 and the other end face of the square plate 1.2 and the annular plate 1.3 are finished. Specifically, the fourth tooling is fixedly installed on the worktable of the CNC vertical lathe through the fourth end plate, and the outer diameter of the thin-walled cylinder 1.1 and the other end face of the square plate 1.2 and the annular plate 1.3 are finished using the CNC vertical lathe. Similarly, in step D3, the fourth cylinder of the fourth tooling is used to position and support the thin-walled cylinder 1.1, thereby effectively reducing the vibration generated during intermittent cutting and improving the machining accuracy of the outer diameter of the thin-walled cylinder 1.1 and the other end face of the square plate 1.2 and the annular plate 1.3.

[0040] In step D4, the thin-walled semi-finished product is fixedly installed on the second fixture 3. The thin-walled cylinder 1.1 is positioned in the positioning hole 3.1, and the annular plate 1.3 is supported on the bottom surface of the positioning hole 3.1. At least one positioning pin is inserted into one of the annular plate holes 1.32 and the corresponding bottom hole. Next, the square plate holes 1.21 and grooves on the square plate 1.2 are finished. Specifically, the base 3.2 is fixed on the worktable of the CNC machining center, and the square plate holes 1.21 and grooves on the square plate 1.2 are finished. Similarly, in step D4, the positioning hole 3.1 of the second fixture 3 is used to position and support the thin-walled cylinder 1.1, thereby effectively reducing the vibration generated during intermittent cutting and improving the machining accuracy of the square plate holes 1.21 and grooves on the square plate 1.2.

[0041] D5. Fix the thin-walled semi-finished part onto the third fixture 4, and finish machine the notches 1.33 on the annular plate 1.3. Specifically, the thin-walled cylinder 1.1 of the thin-walled part blank 1a is positioned on the third cylinder 4.1, the annular plate 1.3 is supported on the top surface of the third cylinder 4.1, and the square plate 1.2 is supported on the third end plate 4.2. At least one locating pin is inserted into the hole 1.21 of the square plate and the pin hole to fix the thin-walled part blank 1a onto the third fixture 4. Next, finish machine the notches 1.33 on the annular plate 1.3. Specifically, the third fixture 4 is fixedly installed onto the worktable of the CNC machining center via the third end plate 4.2, and then the notches 1.33 on the annular plate 1.3 are finished machined using the CNC machining center. Similarly, in step D5, the third tooling 4 is used to position and support the thin-walled cylinder 1.1, thereby effectively reducing the vibration generated during intermittent cutting and improving the machining accuracy of the finishing of each notch 1.33 on the annular plate 1.3.

[0042] Specific embodiment two: A method for intermittent cutting of thin-walled parts, comprising the following steps: A, roughing of thin-walled part blank 1a. For example... Figure 1 As shown, the thin-walled blank 1a includes a thin-walled cylinder 1.1, a square plate 1.2 disposed at one end of the thin-walled cylinder 1.1, and an annular plate 1.3 disposed at the other end of the thin-walled cylinder 1.1, wherein the square plate 1.2 is disposed on the outer wall of one end of the thin-walled cylinder 1.1, and the annular plate 1.3 is disposed on the inner wall of the other end of the thin-walled cylinder 1.1.

[0043] B. The thin-walled blank 1a is placed in a heat treatment furnace for heat treatment to remove the stress generated during roughing. Specifically, the thin-walled blank 1a is placed in a heat treatment furnace with the temperature set at 180℃ and the heat treatment time set at 10 hours. Then, the thin-walled blank 1a is removed and allowed to cool naturally to room temperature. This effectively removes the stress generated during roughing, preparing the material for subsequent semi-finishing and finishing work, and improving machining accuracy.

[0044] The roughened product blank is placed in a heat treatment furnace and set to a temperature of 180℃ for 10 hours for natural cooling to remove the stress generated during roughing.

[0045] C. Mount the thin-walled blank 1a onto the tooling and perform semi-finishing on the thin-walled blank 1a to obtain the semi-finished thin-walled part. The specific steps are as follows. C1, such as Figure 2 As shown, the inner diameters of the thin-walled cylinder 1.1 and the annular plate 1.3, the annular groove 1.31 on the annular plate 1.3, and one end face of the square plate 1.2 and one end face of the annular plate 1.3 are machined. Specifically, the thin-walled blank 1a is directly fixedly mounted on the worktable of a CNC vertical lathe, and the outer diameter of the thin-walled cylinder 1.1 and the other end face of the square plate 1.2 and the annular plate 1.3 are machined using a CNC vertical lathe. Since the inner and outer diameters of the thin-walled cylinder 1.1 have not been machined in step C1, the wall thickness of the thin-walled cylinder 1.1 still has sufficient strength to adapt to the intermittent cutting conditions. The vibration generated during intermittent cutting is small. Therefore, in step C1, the installation and positioning of the tooling can be eliminated without affecting the machining accuracy of the inner diameters of the thin-walled cylinder 1.1 and the annular plate 1.3, the annular groove 1.31 on the annular plate 1.3, and one end face of the square plate 1.2 and the annular plate 1.3, thus improving work efficiency.

[0046] C2, such as Figure 2 , Figure 4 , Figure 7 As shown, the thin-walled blank 1a is mounted on the first fixture 2. The first fixture 2 includes a first cylinder 2.1 and a first end plate 2.2 located at the lower end of the first cylinder 2.1. The outer diameter of the first cylinder 2.1 is adapted to the inner diameter of the thin-walled cylinder 1.1 after processing in step C1. The thin-walled cylinder 1.1 is positioned outside the first cylinder 2.1, the square plate 1.2 abuts against the first end plate 2.2, and the annular plate 1.3 abuts against the end face of the first cylinder 2.1 (when it is necessary to fix the thin-walled part, it can be pressed onto the first fixture 2 by bolts and pressure blocks); then, the outer diameter of the thin-walled cylinder 1.1 and the other end faces of the square plate 1.2 and the annular plate 1.3 are machined. Specifically, the first fixture 2 is fixed on the worktable of the CNC vertical lathe by the first end plate 2.2; then, the outer diameter of the thin-walled cylinder 1.1 and the other end faces of the square plate 1.2 and the annular plate 1.3 are machined by the CNC vertical lathe. In step C2, since the thin-walled cylinder 1.1 has a thin wall thickness due to the cutting process on both the inside and outside, the first cylinder 2.1 of the first tooling 2 is used to position and support the thin-walled cylinder 1.1, thereby effectively reducing the vibration generated during intermittent cutting and improving the machining accuracy of the outer diameter of the thin-walled cylinder 1.1, the square plate 1.2 and the other end face of the annular plate 1.3. At the same time, the setting of cutting parameters can be improved, such as the rotational speed of the tool or the thin-walled part, which is conducive to improving the machining efficiency of the thin-walled part.

[0047] C3, such as Figure 2 , Figure 5 , Figure 8 As shown, the thin-walled blank 1a is mounted on the second fixture 3. The second fixture 3 includes a positioning hole 3.1. Specifically, the second fixture 3 includes a base 3.2, and the positioning hole 3.1 is located in the middle of the top surface of the base 3.2. The inner diameter of the positioning hole 3.1 is adapted to the outer diameter of the thin-walled cylinder 1.1 after processing in step C2. The bottom surface of the positioning hole 3.1 is provided with several circumferentially evenly distributed bottom holes. In this embodiment, there are 8 bottom holes. The thin-walled cylinder 1.1 is positioned in the positioning hole 3.1, and the annular plate 1.3 is supported on the bottom surface of the positioning hole 3.1. The square plate 1.2 abuts against the top surface of the base 3.2 (when it is necessary to fix the thin-walled part, the thin-walled part can be pressed onto the second fixture 3 by bolts and pressure blocks). Next, the annular holes 1.32 on the annular plate 1.3 are machined, with each annular hole 1.32 corresponding to a bottom hole. Specifically, the base 3.2 is fixed on the worktable of the CNC machining center, and the annular holes 1.32 on the annular plate 1.3 are machined using the CNC machining center. Then, at least one locating pin is inserted into one of the annular holes 1.32 and its corresponding bottom hole. Next, the square holes 1.21 and grooves on the square plate 1.2 are machined using the CNC machining center. Since the inner and outer diameters of the thin-walled cylinder 1.1 are machined in step C3, and the thin-walled cylinder 1.1 is relatively thin, the locating holes 3.1 of the second tooling 3 are used to position and support the thin-walled cylinder 1.1, thereby effectively reducing vibrations generated during intermittent cutting and improving the machining accuracy of the square holes 1.21 and grooves on the square plate 1.2. Simultaneously, the cutting parameters can be set more precisely, such as the speed of the tool or the thin-walled part, thus improving the machining efficiency of the thin-walled part.

[0048] C4, such as Figure 2 , Figure 3 , Figure 6As shown, the thin-walled blank 1a is mounted on the third tooling 4, and the notches 1.33 on the annular plate 1.3 are machined. In this embodiment, there are eight notches 1.33, which are evenly distributed around the circumference of the annular plate 1.3, and the notches 1.33 and the holes 1.32 of the annular plate are alternately distributed. Specifically, the third tooling 4 includes a third cylinder 4.1 and a third end plate 4.2 located at the lower end of the third cylinder 4.1. The third end plate 4.2 has at least one pin hole. In this embodiment, the third end plate 4.2 has four pin holes, which correspond to the four square plate holes 1.21 on the square plate 1.2. The top surface of the third cylinder 4.1 has several circumferentially evenly distributed clearance openings 4.3, which correspond one-to-one with the notches 1.33. The thin-walled cylindrical part 1.1 of the thin-walled blank 1a is positioned on the third cylinder 4.1, the annular plate 1.3 is supported on the top surface of the third cylinder 4.1, and the square plate 1.2 is supported on the third end plate 4.2. At least one locating pin is inserted into the pin hole 1.21 of the square plate and the pin hole of the third end plate 4.2 to install the thin-walled blank 1a on the third fixture 4 (when it is necessary to fix the thin-walled part, it can be pressed onto the third fixture 4 by bolts and pressure blocks). Then, the third fixture 4 is fixedly installed on the worktable of the CNC machining center through the third end plate 4.2, and then the CNC machining center is used to machine the notches 1.33 on the annular plate 1.3. Similarly, since the inner and outer diameters of the thin-walled cylinder 1.1 are machined in step C4, and the thin-walled cylinder 1.1 is relatively thin at this time, the third tooling 4 is used to position and support the thin-walled cylinder 1.1, thereby effectively reducing the vibration generated during intermittent cutting and improving the machining accuracy of the notches 1.33 on the annular plate 1.3; at the same time, the setting of cutting parameters can be improved, such as the rotational speed of the tool or the thin-walled part, which is conducive to improving the machining efficiency of the thin-walled part.

[0049] D. Install the thin-walled semi-finished part onto the tooling and perform finishing on the semi-finished part to obtain the finished thin-walled part 1b. The specific steps are as follows. D1. The thin-walled semi-finished product is fixed on the worktable of the CNC machining center. In this embodiment, the thin-walled semi-finished product is fixed on the worktable of the CNC machining center by a fifth fixture. Specifically, the thin-walled semi-finished product is fixed on the fifth fixture, which includes a fifth cylinder and a fifth end plate located at the lower end of the fifth cylinder. The fifth end plate has at least one pin hole. In this embodiment, the fifth end plate has four pin holes, which correspond to the four square plate holes 1.21 on the square plate 1.2. The fifth cylinder has clearance holes corresponding to the side wall holes on the side wall of the thin-walled cylinder 1.1, and the fifth cylinder has clearance grooves corresponding to the grooves on the side wall of the thin-walled cylinder 1.1. The thin-walled cylinder 1.1 of the thin-walled semi-finished product is positioned on the third cylinder 4.1, the annular plate 1.3 is supported on the top surface of the fifth cylinder, and the square plate 1.2 is supported on the fifth end plate. At least one locating pin is inserted into the pin hole of the square plate 1.21 and the fifth end plate to install the thin-walled blank 1a onto the fifth fixture (when it is necessary to fix the thin-walled part, it can be pressed onto the fifth fixture with bolts and pressure blocks). Then, the fifth fixture is fixedly installed onto the worktable of the CNC machining center through the fifth end plate, thereby fixing the thin-walled semi-finished product onto the worktable of the CNC machining center. Next, the side wall holes and grooves on the side wall of the thin-walled cylinder 1.1 are finished.

[0050] D2. The thin-walled semi-finished product is fixedly installed on the second tooling 3. The thin-walled cylinder 1.1 of the thin-walled semi-finished product is positioned in the positioning hole 3.1 of the second tooling 3, and the annular plate 1.3 is supported on the bottom surface of the positioning hole 3.1. The square plate 1.2 abuts against the top surface of the base 3.2. At least one positioning pin is inserted into one of the annular plate holes 1.32 and the corresponding bottom hole. Then, the inner diameter of the thin-walled cylinder 1.1 and the annular plate 1.3, the annular groove 1.31 on the annular plate 1.3, and one end face of the square plate 1.2 and one end face of the annular plate 1.3 are finished. Specifically, the base 3.2 of the second tooling 3 is fixedly installed on the worktable of the CNC vertical lathe, and the outer diameter of the thin-walled cylinder 1.1, one end face of the square plate 1.2, and one end face of the annular plate 1.3 are finished using the CNC vertical lathe. In step D2, due to the thinness of the thin-walled cylinder 1.1, the positioning hole 3.1 of the second tooling 3 is used to position and support the thin-walled cylinder 1.1, thereby effectively reducing the vibration generated during intermittent cutting and improving the machining accuracy of the inner diameter of the thin-walled cylinder 1.1 and the annular plate 1.3, the annular groove 1.31 on the annular plate 1.3, and the finishing of one end face of the square plate 1.2 and the annular plate 1.3.

[0051] D3. The thin-walled semi-finished product is fixedly installed on the fourth fixture, which includes a fourth cylinder and a fourth end plate located at the bottom of the fourth cylinder. The fourth end plate has at least one pin hole. In this embodiment, the fourth end plate has four pin holes, which correspond to the four square plate holes 1.21 on the square plate 1.2. The thin-walled cylinder 1.1 is positioned outside the fourth cylinder, and the square plate 1.2 is supported on the fourth end plate. At least one positioning pin is inserted into the square plate hole 1.21 and the pin hole of the fourth end plate (when it is necessary to fix the thin-walled part, it can be pressed onto the fourth fixture by bolts and pressure blocks); then, the outer diameter of the thin-walled cylinder 1.1 and the other end face of the square plate 1.2 and the annular plate 1.3 are precision machined. Specifically, the fourth fixture is fixedly installed on the worktable of the CNC vertical lathe through the fourth end plate, and the outer diameter of the thin-walled cylinder 1.1 and the other end face of the square plate 1.2 and the annular plate 1.3 are precision machined using the CNC vertical lathe. Similarly, in step D3, the fourth cylinder of the fourth tooling is used to position and support the thin-walled cylinder 1.1, thereby effectively reducing the vibration generated during intermittent cutting and improving the machining accuracy of the outer diameter of the thin-walled cylinder 1.1 and the other end face of the square plate 1.2 and the annular plate 1.3.

[0052] In step D4, the thin-walled semi-finished product is fixedly installed on the second fixture 3. The thin-walled cylinder 1.1 is positioned in the positioning hole 3.1, and the annular plate 1.3 is supported on the bottom surface of the positioning hole 3.1. At least one positioning pin is inserted into one of the annular plate holes 1.32 and the corresponding bottom hole. Next, the square plate holes 1.21 and grooves on the square plate 1.2 are finished. Specifically, the base 3.2 is fixed on the worktable of the CNC machining center, and the square plate holes 1.21 and grooves on the square plate 1.2 are finished. Similarly, in step D4, the positioning hole 3.1 of the second fixture 3 is used to position and support the thin-walled cylinder 1.1, thereby effectively reducing the vibration generated during intermittent cutting and improving the machining accuracy of the square plate holes 1.21 and grooves on the square plate 1.2.

[0053] D5. Fix the thin-walled semi-finished part onto the third fixture 4, and finish machine the notches 1.33 on the annular plate 1.3. Specifically, the thin-walled cylinder 1.1 of the thin-walled part blank 1a is positioned on the third cylinder 4.1, the annular plate 1.3 is supported on the top surface of the third cylinder 4.1, and the square plate 1.2 is supported on the third end plate 4.2. At least one locating pin is inserted into the hole 1.21 of the square plate and the pin hole to fix the thin-walled part blank 1a onto the third fixture 4. Next, finish machine the notches 1.33 on the annular plate 1.3. Specifically, the third fixture 4 is fixedly installed onto the worktable of the CNC machining center via the third end plate 4.2, and then the notches 1.33 on the annular plate 1.3 are finished machined using the CNC machining center. Similarly, in step D5, the third tooling 4 is used to position and support the thin-walled cylinder 1.1, thereby effectively reducing the vibration generated during intermittent cutting and improving the machining accuracy of the finishing of each notch 1.33 on the annular plate 1.3.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, alterations, and equivalent transformations made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A method for intermittent cutting of thin-walled parts, characterized in that, Includes the following steps: A. Roughing of thin-walled part blank: The thin-walled part blank includes a thin-walled cylinder, a square plate at one end of the thin-walled cylinder, and an annular plate at the other end of the thin-walled cylinder. B. The thin-walled blank is placed in a heat treatment furnace for heat treatment to remove the stress generated during roughing. C. Install the thin-walled blank on the tooling and perform semi-finishing on the thin-walled blank to obtain the thin-walled semi-finished product. D. Install the thin-walled semi-finished product on the tooling and perform precision machining on the thin-walled semi-finished product to obtain the finished thin-walled product.

2. The intermittent cutting method for thin-walled parts according to claim 1, characterized in that, The specific steps of step C are as follows. C1, machining the inner diameter of thin-walled cylinders and annular plates, the annular groove on the annular plate, and one end face of square plates and annular plates; C2, install the thin-walled blank on the first fixture, the first fixture includes a first cylinder, and the thin-walled cylinder is positioned outside the first cylinder; then, machine the outer diameter of the thin-walled cylinder and the other end face of the square plate and the annular plate; C3. Install the thin-walled blank onto the second fixture, which includes a positioning hole. The bottom surface of the positioning hole has several circumferentially evenly distributed bottom holes. The thin-walled cylinder is positioned inside the positioning hole, and the annular plate is supported on the bottom surface of the positioning hole. Next, machine the annular plate holes on the annular plate, with each annular plate hole corresponding to a bottom hole. Then, insert at least one positioning pin into one of the annular plate holes and the corresponding bottom hole. Next, machine the square plate holes and grooves on the square plate. C4. Install the thin-walled blank on the third tooling and machine the notches on the annular plate.

3. The intermittent cutting method for thin-walled parts according to claim 2, characterized in that, The third tooling includes a third cylinder and a third end plate located at the bottom of the third cylinder. The third end plate has a pin hole, and the top surface of the third cylinder has several circumferentially evenly distributed clearance openings, with each clearance opening corresponding to a notch. The thin-walled part blank is positioned on the third cylinder, with an annular plate supported on the top surface of the third cylinder and a square plate supported on the third end plate. At least one positioning pin is inserted into the hole in the square plate and the pin hole to install the thin-walled part blank on the third tooling.

4. A method for intermittent cutting of thin-walled parts according to claim 2 or 3, characterized in that, In step C1, a CNC vertical lathe is used to machine the outer diameter of the thin-walled cylinder and the other end face of the square plate and the annular plate. In step C2, a CNC vertical lathe is used to machine the outer diameter of the thin-walled cylinder and the other end face of the square plate and the annular plate.

5. A method for intermittent cutting of thin-walled parts according to claim 2 or 3, characterized in that, In step C3, a CNC machining center is used to process the annular plate holes, the square plate holes, and the grooves. In step C4, a CNC machining center is used to process the notches on the annular plate.

6. A method for intermittent cutting of a thin-walled part according to claim 2 or 3, characterized in that, Step D includes the following steps: D1. Fix the thin-walled semi-finished product on the worktable of the CNC machining center. Then, finish machine the side wall holes and grooves on the side wall of the thin-walled cylinder.

7. The intermittent cutting method for thin-walled parts according to claim 6, characterized in that, The steps following step D1 include the following steps: D2, the thin-walled semi-finished product is fixedly installed on the second tooling. The thin-walled cylinder of the thin-walled semi-finished product is positioned in the positioning hole of the second tooling, and at least one positioning pin is inserted into one of the holes of the annular plate and the corresponding bottom hole. Then, the inner diameter of the thin-walled cylinder and the annular plate, the annular groove on the annular plate, the square plate and one end face of the annular plate are precision machined. D3. Fix the thin-walled semi-finished product onto the fourth tooling. The fourth tooling includes a fourth cylinder and a fourth end plate located at the bottom of the fourth cylinder. The fourth end plate has a pin hole. The thin-walled cylinder is positioned outside the fourth cylinder. The square plate is supported on the fourth end plate. At least one positioning pin is inserted into the hole in the square plate and the pin hole in the fourth end plate. Then, finish machine the outer diameter of the thin-walled cylinder and the other end face of the square plate and the annular plate.

8. The intermittent cutting method for thin-walled parts according to claim 7, characterized in that, The In step D2, a CNC vertical lathe is used to precision machine the outer diameter of the thin-walled cylinder and one end face of the square plate and the annular plate. In step D3, a CNC vertical lathe is used to precision machine the outer diameter of the thin-walled cylinder and the other end face of the square plate and the annular plate.

9. The intermittent cutting method for thin-walled parts according to claim 7, characterized in that, After step D3, Includes the following steps, D4. Fix the thin-walled semi-finished product onto the second tooling. Position the thin-walled cylinder in the positioning hole. Support the annular plate on the bottom surface of the positioning hole. Insert at least one positioning pin into one of the annular plate holes and the corresponding bottom hole. Next, finish machine each square plate hole and groove on the square plate.

10. The intermittent cutting method for thin-walled parts according to claim 9, characterized in that, After step D4, Includes the following steps, D5. Fix the thin-walled semi-finished product onto the third tooling and finish machine the notches on the annular plate.

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