Processing method of reset disc spring of plasma gun ultrafast gas injection

Abstract

The application relates to the technical field of precision device manufacturing, in particular to the technical field of spring manufacturing, and more particularly to a processing method of a reset disc spring of a plasma gun superfast gas injection, which comprises the following steps: processing by using 51CrV4 or TC4, accurately controlling stress and deformation of a part in a processing process by designing targeted processing process parameters and sequences, and finally enabling the reset disc spring of the plasma gun superfast gas injection to meet the design index requirements.

Description

Technical Field

[0001] This application relates to the field of precision device manufacturing technology, specifically to a method for processing a reset disc spring for ultra-fast plasma gun gas injection. Background Technology

[0002] Irregularly shaped springs utilize the spring's own structure and material properties to meet design requirements such as limiting, movement, and resetting. Depending on the functional requirements, different structures and appropriate materials need to be selected. The difference between irregularly shaped springs and conventional springs is that the spring itself is irregular, involving curved surfaces, openings, angles, etc., thus making manufacturing and processing methods complex and requiring high-level technology. Its manufacturing and processing mainly involve metal part machining methods, including turning, drilling and boring, milling, heat treatment, and grinding.

[0003] Because irregularly shaped springs require very strict standards in terms of functionality, strength, and precision, the selection of raw materials, cutting methods, grinding methods, heat treatment sequence, and changes in heat treatment parameters all affect product performance.

[0004] The return spring used for ultra-fast gas injection in plasma guns falls under the category of irregular springs. Its dimensional accuracy, shape, and other parameters must meet the time and speed requirements for ultra-fast neutral gas injection. At the same time, it is necessary to ensure the integrity of the ultra-fast gas valve disc structure that is matched with this return spring structure.

[0005] Existing technologies make it difficult to maintain the shape of the reset spring after heat treatment and quenching of the material, and it is easy to cause deformation and cracks. The overall accuracy is easy to exceed the dimensional tolerance and cannot meet the drawing requirements. Therefore, it is necessary to design processing methods and processes specifically. Summary of the Invention

[0006] In view of the shortcomings of the prior art described above, the purpose of this application is to provide a processing method for a reset disc spring of a plasma gun with ultra-fast gas injection, and to form a processing method for a product that is suitable for industrial processing and meets the design requirements for the reset disc spring of the plasma gun with ultra-fast gas injection designed by the applicant.

[0007] The reset disc spring for the ultra-fast plasma gun injection described in this application belongs to the category of irregular springs. The spring is made of alloy spring steel 51CrV4 or titanium alloy TC4 with a yield strength of at least 1000MPa. The reset disc spring includes a base part and an elastic structure part. The base part includes a support ring and bolt holes distributed on the support ring. The elastic structure part includes elastic wings with several openings. The elastic wings are connected to the support ring.

[0008] In some embodiments of this application, the bolt holes are evenly distributed on the support ring.

[0009] In some embodiments of this application, each of the openings intersects at the center of the elastic wing and extends toward its edge.

[0010] In some embodiments of this application, the bolt hole is a countersunk hole.

[0011] In some embodiments of this application, the thickness of the support ring is 5mm to 20mm.

[0012] In some embodiments of this application, the thickness of the elastic wing is uniform.

[0013] In some embodiments of this application, the elastic wing gradually thickens from its center to its edge.

[0014] In some embodiments of this application, the thickness of the elastic wing is 0.5 mm to 3 mm.

[0015] In some embodiments of this application, the number of openings is 3 to 12.

[0016] In some embodiments of this application, the width of the opening is 1mm to 5mm and the length is 20mm to 60mm.

[0017] To achieve the above and other related objectives, the technical solution of this application is implemented by including the following technical solutions.

[0018] This application discloses a method for manufacturing a reset disc spring for ultrafast plasma gun injection, including:

[0019] S1. Provide an alloy block material larger than the size of the reset disc spring;

[0020] S2. Rough turning forms a cylindrical structure;

[0021] S3. Rough milling to form a base portion, the base portion including a support ring and bolt holes located on the support ring;

[0022] S4, heat treatment;

[0023] S5. Finish machining in the vertical direction;

[0024] S6. Finish milling to form an elastic wing without openings;

[0025] S7. Wire cutting to form an opening on the elastic wing.

[0026] Preferably, in S1, the alloy block is cylindrical or hexahedral.

[0027] Preferably, in step S1, the dimensions of the alloy block are at least 1.0 mm larger than the disc spring in both the radial and vertical directions. This ensures sufficient machining allowance to remove oxide layers, burrs, etc., from the surface of the raw material, thereby ensuring the quality of subsequent processing steps.

[0028] More preferably, in S1, the size of the alloy block is 1.0 to 10.0 mm larger than the disc spring in both the radial and vertical directions, such as 1.0 mm, 2.0 mm, 3.0 mm, 4.0 mm, 5.0 mm, 6.0 mm, 7.0 mm, 8.0 mm, 9.0 mm, or 10.0 mm larger.

[0029] Preferably, the yield strength of the alloy block is at least 1000 MPa.

[0030] More preferably, in S1, the alloy block is 51CrV4 or titanium alloy TC4.

[0031] Preferably, in step S2, the cylindrical structure is at least 0.8 mm larger than the disc spring in both radial and height dimensions. More preferably, the cylindrical structure is 0.8 to 8.0 mm larger than the disc spring in both radial and height dimensions, such as 0.8 mm, 1.6 mm, 2.4 mm, 3.2 mm, 4.0 mm, 4.8 mm, 5.6 mm, 6.4 mm, 7.2 mm, or 8.0 mm.

[0032] Preferably, in S3, the machining allowance after rough milling is at least 0.3 mm. More preferably, the machining allowance after rough milling is 0.3 to 3.0 mm, such as 0.3 mm, 0.6 mm, 0.9 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2.1 mm, 2.4 mm, 2.7 mm, or 3.0 mm.

[0033] Since the applicant discovered that the workpiece would undergo significant deformation during the heat treatment process, the applicant ensured that the workpiece would meet the design requirements after further processing by guaranteeing the machining allowance before heat treatment.

[0034] Preferably, in step S4, the heat treatment forms a first semi-finished product with a Rockwell hardness (HRC) of 48-55, such as 48HRC, 49HRC, 50HRC, 51HRC, 52HRC, 53HRC, 54HRC, or 55HRC. Achieving this Rockwell hardness after heat treatment helps eliminate internal stress and improves the plasticity and toughness of the metal.

[0035] Preferably, in S4, the heat treatment includes: first, high-temperature quenching, and then tempering.

[0036] More preferably, the high-temperature quenching includes quenching at 800–900°C for 1–2 hours, followed by oil cooling. The high-temperature quenching temperature can be 810°C, 820°C, 830°C, 840°C, 850°C, 860°C, 870°C, 880°C, 890°C, or 900°C. Within this temperature range, if the quenching time is too long (exceeding 2 hours), the material will overheat, become brittle, and have excessively high hardness; if the quenching time is too short (less than 1 hour), the required hardness cannot be achieved.

[0037] More preferably, the tempering includes: tempering at 400–650°C for 1–2 hours, followed by air cooling. The tempering temperature can be 400°C, 410°C, 420°C, 430°C, 440°C, 450°C, 460°C, 470°C, 480°C, 490°C, 500°C, 510°C, 520°C, 530°C, 540°C, 550°C, 560°C, 570°C, 580°C, 590°C, 600°C, 610°C, 620°C, 630°C, 640°C, or 650°C. Tempering further eliminates internal stress, making the alloy microstructure more stable and improving the stability of subsequent processing.

[0038] Preferably, in step S5, the precision turning is performed to allow for a machining allowance of at least 0.2 mm in the height direction. More preferably, the machining allowance in the height direction after precision turning is 0.2 to 2.0 mm, such as 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, or 2.0 mm.

[0039] Preferably, in S6, the thickness tolerance of the elastic wing without openings is greater than or equal to -0.02 mm and less than or equal to 0.02 mm.

[0040] Preferably, in S6, the precision milling range includes the bolt holes on the support ring. More preferably, after precision milling, the dimensional tolerance of the bolt holes is greater than or equal to -0.02 mm and less than or equal to 0.02 mm.

[0041] Preferably, a grinding step is also performed between the precision milling and the wire cutting.

[0042] More preferably, after the polishing, the surface roughness of the disc spring is within Ra1.6. More preferably, the surface roughness of the disc spring is Ra0.012 to Ra1.6, such as Ra0.012, Ra0.025, Ra0.05, Ra0.1, Ra0.2, Ra0.4, Ra0.8, or Ra1.6.

[0043] More preferably, the polishing is done with 800-2000 grit sandpaper and / or 800-1500 grit polishing paste. For example, the grit of the sandpaper can be 800 grit, 1000 grit, 1200 grit, 1500 grit, or 2000 grit, and the grit of the polishing paste can be 800 grit, 1000 grit, 1200 grit, or 1500 grit.

[0044] Preferably, the elastic wing is ground. Grinding removes tool marks, thereby reducing wear on other components that come into contact with the disc spring.

[0045] Preferably, in S7, the dimensional tolerance of the opening formed by the wire cutting is greater than or equal to -0.02 mm and less than or equal to 0.02 mm.

[0046] Preferably, in S7, during wire cutting, the wire speed is 5.0-10.0 m / min and the wire diameter is 0.1-0.3 mm.

[0047] Preferably, in step S7, after the wire cutting, the base portion is further precision machined again.

[0048] More preferably, the dimensional tolerance of the portion machined again to the base is greater than or equal to -0.02 mm and less than or equal to 0.02 mm.

[0049] The above processing method can solve the problem that the reset disc spring of the plasma gun cannot meet the processing accuracy requirements during ultra-fast gas injection, and ensure that the reset disc spring meets the design requirements. Attached Figure Description

[0050] Figure 1 The diagram shows a reset disc spring structure for the ultrafast gas injection of the plasma gun described in this application.

[0051] Figure 2 The image shown is a top view of the reset disc spring structure for the ultrafast gas injection of the plasma gun described in this application.

[0052] Figure 3 The image shown is a front view of the reset disc spring structure for the ultrafast gas injection of the plasma gun described in this application.

[0053] Explanation of icon numbers

[0054] 2 Elastic structure part 3 support ring 4 Bolt holes 5 Flexible wings 6 Opening Detailed Implementation

[0055] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0056] It should be noted that the process equipment or apparatus not specifically mentioned in the following embodiments are all conventional equipment or apparatus in the art.

[0057] Furthermore, it should be understood that the existence of other method steps before or after the combined steps, or the insertion of other method steps between these explicitly mentioned steps, does not preclude the existence of other method steps before or after the combined steps, or the insertion of other method steps between these explicitly mentioned steps, unless otherwise stated. It should also be understood that the combined connection relationship between one or more devices / apparatus mentioned in this invention does not preclude the existence of other devices / apparatus before or after the combined devices / apparatus, or the insertion of other devices / apparatus between these explicitly mentioned devices / apparatus, unless otherwise stated. Moreover, unless otherwise stated, the numbering of each method step is merely a convenient tool for identifying each method step, and not for limiting the order of the method steps or limiting the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0058] This invention is for processing such as Figures 1-3 The plasma gun's ultra-fast gas injection reset disc spring.

[0059] See Figure 1 The plasma gun ultra-fast gas injection reset disc spring of the present invention includes a base part 1 and an elastic structure part 2. The base part 1 includes a support ring 3 and bolt holes 4 distributed on the support ring 3. The elastic structure part 2 includes an elastic wing 5, and the elastic wing 5 is provided with a plurality of openings 6. The elastic wing 5 is connected to the support ring 3.

[0060] In the reset disc spring of the plasma gun ultrafast gas injection described in this invention, see [reference needed]. Figure 1 The base portion 1 shown has bolt holes 4 evenly distributed on the support ring 3, thereby providing a uniform tightening force. The bolt holes 4 are used to connect the support ring 3 to the inner electrode.

[0061] In the reset disc spring of the plasma gun ultrafast gas injection described in this invention, see [reference needed]. Figure 1 The elastic structure portion 2 shown has each of the openings 6 intersecting at the center of the elastic wing 5 and extending toward its edge. Specifically, the elastic wing 5 includes a plurality of subwings, and the subwings and openings 6 are evenly and alternately distributed in the circumferential direction, thereby providing a uniformly distributed force.

[0062] In the reset disc spring of the plasma gun ultrafast gas injection described in this invention, see [reference needed]. Figures 1-2 The bolt hole 4 shown is generally designed as a countersunk head structure, which allows the head of the fastening bolt to be recessed into the countersunk hole, thus not restricting the travel of the moving disc.

[0063] In the reset disc spring of the plasma gun ultrafast gas injection described in this invention, see [reference needed]. Figures 1-2 The support ring 3 shown is designed to have sufficient thickness according to actual needs, ensuring enough space to accommodate the countersunk bolts and ensuring that it has sufficient mechanical strength.

[0064] In some embodiments, the thickness of the support ring 3 is 5mm to 20mm. Optionally, the thickness of the support ring 3 can be, for example, 5mm to 10mm, 10mm to 15mm, or 15mm to 20mm.

[0065] In the reset disc spring of the plasma gun ultrafast gas injection described in this invention, see [reference needed]. Figures 1-3 The elastic wing 5 shown can have a uniform or gradually varying thickness. For example, the elastic wing 5 can gradually thicken from its center to its edge. Another example is a center thickness of 0.5 mm and a maximum edge thickness of 3 mm. By setting the thickness uniformly or gradually, it can have different stiffness coefficients according to actual needs, thereby providing suitable elastic force and ensuring the mechanical strength of itself and the flying disc in contact with it.

[0066] In some embodiments, the material of the elastic wing 5 may be, for example, alloy spring steel such as 51CrV4, or titanium alloy such as TC4.

[0067] In some embodiments, the thickness of the elastic wing 5 is 0.5 mm to 3 mm. Optionally, the thickness of the elastic wing 5 can be, for example, 0.5 mm to 1 mm, 1 mm to 2 mm, or 2 mm to 3 mm.

[0068] The reset mechanism for ultrafast gas injection in plasma guns provided in this application, see [reference needed]. Figure 2 The opening 6 shown can be designed in terms of length, width and shape according to actual needs, so as to have different stiffness coefficients to provide suitable elastic force, ensuring mechanical strength while meeting the required reset speed and time.

[0069] In some embodiments, the number of openings 6 is 3 to 12. Optionally, the number of openings 6 can be, for example, 3 to 4, 4 to 6, 6 to 8, 8 to 10, 10 to 12, 3 to 6, 6 to 9, or 9 to 12. The shape formed by the combination of the openings 6 can be, for example, a star shape.

[0070] In some embodiments, the width of the opening 6 is 1mm to 5mm. Optionally, the width of the opening 6 can be, for example, 1mm to 3mm or 3mm to 5mm. The length of the opening 6 is 20mm to 60mm. Optionally, the length of the opening 6 can be, for example, 20mm to 30mm, 30mm to 40mm, 40mm to 50mm, or 50mm to 60mm.

[0071] The processing method provided in this application is precisely for processing into a reset disc spring as described above.

[0072] To solve this technical problem, the applicant uses alloy spring steel 51CrV4 or titanium alloy TC4 for processing. By designing targeted processing methods, the parameters and sequence of processes such as rough turning, finish turning, rough milling, finish milling, heat treatment, and wire cutting are rationally designed. The stress and deformation of the parts during processing are accurately controlled to ensure that the design requirements are met.

[0073] In one specific implementation, the design specifications are as follows:

[0074] (1) The design height is 6.0 to 25.0 mm, and the machining deviation in the height direction is greater than or equal to -0.02 mm and less than or equal to 0.02 mm;

[0075] (2) The thickness of the elastic wing 5 is 0.5 to 3 mm, and the machining deviation is greater than or equal to -0.02 mm and less than or equal to 0.02 mm;

[0076] (3) The width of opening 6 is 1mm to 5mm, and the machining deviation is greater than or equal to -0.02mm and less than or equal to 0.02mm;

[0077] (4) The length of opening 6 is 20mm to 60mm, and the machining deviation is greater than or equal to -0.02mm and less than or equal to 0.02mm;

[0078] (5) The maximum outer diameter is 60 to 120 mm, and the machining deviation is greater than or equal to -0.05 mm and less than or equal to 0.05 mm.

[0079] Although the plasma gun ultrafast gas injection and reset disc spring appears structurally simple, controlling the arcuate portion of the elastic wing 5 and its final overall height is extremely difficult. In particular, since the designed disc spring contains multiple elastic wings 5, each wing needs to be controlled within a dimensional tolerance greater than or equal to -0.02 mm and less than or equal to 0.02 mm. This places extremely high demands on machining precision and presents a significant challenge. This invention proposes a new machining method to solve this problem.

[0080] Example 1

[0081] In this embodiment, a disc spring with the following design specifications is manufactured:

[0082] (1) The design height is 9.0mm, and the machining deviation in the height direction is greater than or equal to -0.02mm and less than or equal to 0.02mm;

[0083] (2) The thickness of the elastic wing 5 is 2.0 mm, and the processing deviation is greater than or equal to -0.02 mm and less than or equal to 0.02 mm;

[0084] (3) The width of opening 6 is 3.0 mm, and the machining deviation is greater than or equal to -0.02 mm and less than or equal to 0.02 mm;

[0085] (4) The length of opening 6 is 45.0 mm, and the machining deviation is greater than or equal to -0.02 mm and less than or equal to 0.02 mm;

[0086] (5) The maximum outer diameter is 90.0 mm, and the machining deviation is greater than or equal to -0.05 mm and less than or equal to 0.05 mm.

[0087] Specific processing methods:

[0088] 1) Take a cylindrical 51CrV4 raw material with a radial dimension 1.0 mm larger and a height dimension 1.0 mm larger than that of the disc spring. The above allowance can ensure the removal of oxide layer, burrs and other defects on the surface of the raw material, thereby ensuring the quality of subsequent processing steps.

[0089] 2) Roughly machine the 51CrV4 raw material to obtain a cylindrical structure, with a machining allowance of 0.8mm.

[0090] 3) Use a CNC machining center to rough mill the bolt holes 4 on the support ring 3, and leave a machining allowance of at least 0.3mm;

[0091] 4) The parts processed in the above steps undergo heat treatment. First, high-temperature quenching is performed at 870℃ for 1 hour followed by oil cooling; then, tempering at 530℃ for 1 hour, followed by air cooling. After heat treatment, the hardness is controlled at HRC50-52. Heat treatment helps eliminate internal stress and improves the plasticity and toughness of the metal. In addition, heat treatment of the parts before precision turning and milling helps to avoid deformation caused by stress release during the final heat treatment process.

[0092] 5) After heat treatment, the height of the part is precision machined, and a machining allowance of 0.3mm is reserved in the height direction to provide sufficient allowance for subsequent precision machining processes;

[0093] 6) Use a CNC machining center to precision mill the elastic wing 5 and the bolt holes 4 on the support ring 3. The thickness tolerance of the elastic wing 5 is controlled to be greater than or equal to -0.02mm and less than or equal to 0.02mm, and the dimensional tolerance of the bolt holes 4 is controlled to be greater than or equal to -0.02mm and less than or equal to 0.02mm. Through this precision milling process, the dimensions of the elastic wing 5 and the bolt holes 4 are machined to the required tolerances in one go.

[0094] 7) Polishing. First, use 1500-grit sandpaper to polish the surface to remove coarse tool marks. Then, use 1200-grit polishing compound to further remove tool marks. The purpose of this process is to control the surface roughness of the disc spring to within Ra1.6, thereby reducing wear on other parts that come into contact with the disc spring.

[0095] 8) The opening 6 is formed by wire cutting. During the cutting process, in order to ensure the smoothness of the opening 6 and meet the dimensional tolerance of greater than or equal to -0.02mm and less than or equal to 0.02mm, a slow wire feed (wire speed 10.0m / min) method is used, and a wire diameter of 0.3mm is selected to cut and form the opening 6.

[0096] 9) By re-machining the base part 1, the total height of the disc spring is finally ensured to meet the requirements, and its dimensional tolerance is controlled to be greater than or equal to -0.02 and less than or equal to 0.02 mm.

[0097] In this embodiment, by using the above-mentioned processing method, when processing with alloy spring steel 51CrV4, the processing parameters are designed in a targeted manner, and the sequence of rough turning, finish turning, rough milling, finish milling, heat treatment, wire cutting, and grinding is reasonably designed. The stress and deformation of the parts during the processing are accurately grasped and controlled, which ultimately solves the problem that the reset disc spring of the plasma gun ultra-fast gas injection cannot meet the processing accuracy requirements, and ensures that the reset disc spring meets the design requirements.

[0098] After 1500 normal plasma gun firing tests, the reset disc spring did not break and was able to perform normal reset function.

[0099] Example 2

[0100] In this embodiment, the processing design parameters are consistent with those in the previous embodiment.

[0101] Specific processing methods:

[0102] 1) Take a cylindrical TC4 raw material with a radial dimension 1.0 mm larger and a height dimension 1.0 mm larger than that of the disc spring. The above allowance can ensure the removal of oxide layer, burrs, etc. on the surface of the raw material, thereby ensuring the quality of subsequent processing steps.

[0103] 2) Roughly machine the TC4 raw material to obtain a cylindrical structure, with a machining allowance of 0.8mm;

[0104] 3) Use a CNC machining center to rough mill the bolt holes 4 on the support ring 3, and leave a machining allowance of at least 0.4mm;

[0105] 4) The parts processed in the above steps undergo heat treatment. First, high-temperature quenching is performed at 880℃ for 1 hour followed by oil cooling; then, tempering at 550℃ for 1 hour, followed by air cooling. After heat treatment, the hardness is controlled at HRC50-52. Heat treatment helps eliminate internal stress and improves the plasticity and toughness of the metal. In addition, heat treatment of the parts before precision turning and milling helps to avoid deformation caused by stress release during the final heat treatment process.

[0106] 5) After heat treatment, the height of the part is precision machined, and a machining allowance of 0.2mm is reserved in the height direction to provide sufficient allowance for subsequent precision machining processes;

[0107] 6) Use a CNC machining center to precision mill the elastic wing 5 and the bolt holes 4 on the support ring 3. The thickness tolerance of the elastic wing 5 is controlled to be greater than or equal to -0.02mm and less than or equal to 0.02mm, and the dimensional tolerance of the bolt holes 4 is controlled to be greater than or equal to -0.02mm and less than or equal to 0.02mm. Through this precision milling process, the dimensions of the elastic wing 5 and the bolt holes 4 are machined to the required tolerances in one go.

[0108] 7) Polishing. First, use 1500-grit sandpaper to polish the surface to remove coarse tool marks. Then, use 1200-grit polishing compound to further remove tool marks. The purpose of this process is to control the surface roughness of the disc spring to within Ra1.6, thereby reducing wear on other parts that come into contact with the disc spring.

[0109] 8) The opening 6 is formed by wire cutting. During the cutting process, in order to ensure the smoothness of the opening 6 and meet the dimensional tolerance of greater than or equal to -0.02mm and less than or equal to 0.02mm, a slow wire feed (wire speed 10.0m / min) method is used, and a wire diameter of 0.1mm is selected to cut and form the opening 6.

[0110] 9) By re-machining the base part 1, the total height of the disc spring is finally ensured to meet the requirements, and its dimensional tolerance is controlled to be greater than or equal to -0.02mm and less than or equal to 0.02mm.

[0111] In this embodiment, by using the above-mentioned processing method, when using titanium alloy TC4 for processing, the processing parameters are designed in a targeted manner, and the sequence of rough turning, finish turning, rough milling, finish milling, heat treatment, wire cutting, and grinding is reasonably designed. The stress and deformation of the parts during the processing are accurately grasped and controlled, which ultimately solves the problem that the reset disc spring of the plasma gun ultra-fast gas injection cannot meet the processing accuracy requirements, and ensures that the reset disc spring meets the design requirements.

[0112] After 1500 normal plasma gun firing tests, the reset disc spring did not break and was able to perform normal reset function.

[0113] Example 3

[0114] The only difference from Example 1 is that, during the heat treatment process, the high-temperature quenching is performed at 800°C for 2 hours.

[0115] This embodiment solves the problem that the reset disc spring in the ultra-fast plasma gun cannot meet the machining accuracy requirements, ensuring that the reset disc spring meets the design requirements. Furthermore, after 1500 normal plasma gun firing tests, the reset disc spring did not show any damage and consistently performed its normal reset function.

[0116] Example 4

[0117] In this embodiment, a disc spring with the following design specifications is manufactured:

[0118] The design height is 20.0mm; the thickness of the elastic wing 5 is 2.5mm; the width of the opening 6 is 5mm; the length of the opening 6 is 50mm; and the maximum outer diameter is 120mm.

[0119] The specific processing technology is the same as in Example 1.

[0120] This embodiment solves the problem that the reset disc spring in the ultra-fast gas injection of the plasma gun cannot meet the machining accuracy requirements, ensuring that the reset disc spring meets the design requirements. Furthermore, after 1500 normal plasma gun firing tests, the reset disc spring showed no damage and consistently fulfilled its normal reset function.

[0121] Comparative Example 1

[0122] 1) Select cylindrical or hexahedral 51CrV4 or TC4 raw materials that are at least 1.0 mm larger than the disc spring in both radial and vertical directions, ensuring sufficient machining allowance to remove oxide layers, burrs, etc. from the surface of the raw materials. This ensures the quality of subsequent processing steps;

[0123] 2) Rough turn the 51CrV4 or TC4 raw material to obtain a cylindrical structure. This step requires a machining allowance of at least 2.0 mm.

[0124] 3) Use a CNC machining center to precision mill the bolt holes 4 on the support ring 3 to the required depth and leave a machining allowance of at least 0.5mm;

[0125] 4) Perform precision machining in the height direction, and leave a machining allowance of 0.1mm in the height direction dimension;

[0126] 5) Wire EDM. Wire speed is 10.0 m / min, wire diameter is 0.3 mm, cutting to form an opening of 6, with dimensional tolerance controlled within -0.02 mm and less than or equal to 0.02 mm;

[0127] 6) Re-machining. By re-machining the base part 1, the total height of the disc spring is finally ensured to meet the requirements, and its dimensional tolerance is controlled to be greater than or equal to -0.02mm and less than or equal to 0.02mm;

[0128] 7) Perform heat treatment on the parts processed in the above steps. First, perform high-temperature quenching at 800-820℃ for 1-2 hours, then oil cooling; then, perform tempering at 400-500℃ for 1-2 hours, followed by air cooling. After heat treatment, the hardness should be controlled at HRC48-55.

[0129] 8) Polishing. First, use 600-grit sandpaper to polish the surface to remove the coarse tool marks, and then use 800-grit polishing compound to further remove the tool marks.

[0130] Although this comparative example also uses 51CrV4 and TC4 materials that meet the yield strength requirements, maintaining the designed shape after heat treatment and quenching is very difficult, and in severe cases, it can even cause deformation and cracks, failing to meet the design requirements of the drawings and making it impossible to ensure the aforementioned processing deviations, especially the deviation of the elastic wing 5. Furthermore, when measuring the total height of the disc spring with a dial indicator height gauge, it was found that the spring height far exceeded the dimensional tolerance; therefore, it is clear that this process cannot be directly used for processing.

[0131] In summary, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0132] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A method for manufacturing a reset disc spring for ultrafast plasma gun injection, characterized in that, Includes the following steps: S1. Provide an alloy block material larger than the size of the reset disc spring; S2. Rough turning forms a cylindrical structure; S3. Rough milling to form a base portion, the base portion including a support ring and bolt holes located on the support ring; S4, heat treatment; S5. Finish machining in the vertical direction; S6. Finish milling to form an elastic wing without openings; S7. Wire cutting to form an opening on the elastic wing; The reset disc spring includes a base part and an elastic structure part. The elastic structure part includes an elastic wing. The elastic wing has a plurality of openings. The openings intersect at the center of the elastic wing and extend toward its edge. The elastic wing includes a plurality of sub-wings. The sub-wings and openings are evenly and alternately distributed in the circumferential direction, thereby providing a uniformly distributed force. The yield strength of the alloy block is at least 1000 MPa; the dimensions of the alloy block are at least 1.0 mm larger than the disc spring in both the radial and vertical directions; in S3, the machining allowance after rough milling is at least 0.3 mm; the heat treatment is first high-temperature quenching, followed by tempering; in S5, the finish turning is performed to leave a machining allowance of at least 0.2 mm in the vertical direction; the high-temperature quenching is quenching at 800~900℃ for 1~2 hours followed by oil cooling; the tempering is tempering at 400~650℃ for 1~2 hours followed by air cooling; In S6, the thickness tolerance of the elastic wing without opening is greater than or equal to -0.02mm and less than or equal to 0.02mm; and / or, the precision milling range also includes the bolt holes on the support ring, and after precision milling, the dimensional tolerance of the bolt holes is greater than or equal to -0.02mm and less than or equal to 0.02mm; in S7, the dimensional tolerance of the opening formed by wire cutting is greater than or equal to -0.02mm and less than or equal to 0.02mm; during wire cutting, the wire speed is 5.0-10.0m / min, and the wire diameter is 0.1~0.3mm.

2. The method for processing a reset disc spring for ultrafast plasma gun injection according to claim 1, characterized in that, In S1, the alloy block is cylindrical or hexahedral.

3. The method for processing a reset disc spring for ultrafast plasma gun injection according to claim 2, characterized in that, The alloy block material is alloy spring steel 51CrV4 or titanium alloy TC4.

4. The method for processing a reset disc spring for ultrafast plasma gun injection according to claim 1, characterized in that, In S2, the cylindrical structure is at least 0.8 mm larger in both radial and height dimensions than the disc spring.

5. The method for processing a reset disc spring for ultrafast plasma gun injection according to claim 1, characterized in that, In step S4, the heat treatment forms a first semi-finished product, and the hardness of the first semi-finished product is Rockwell hardness of 48~55.

6. The method for processing a reset disc spring for ultrafast plasma gun injection according to claim 1, characterized in that, A polishing step is also performed between S6 and S7.

7. The method for processing a reset disc spring for ultrafast plasma gun injection according to claim 6, characterized in that, After the polishing, the surface roughness of the disc spring is within Ra1.6; and / or the polishing is done with 800-2000 grit sandpaper and / or 800-1500 grit polishing paste.

8. The method for processing a reset disc spring for ultrafast plasma gun injection according to claim 1, characterized in that, In step S7, after the wire cutting, the base portion is further precision machined again; the dimensional tolerance of the base portion after the second precision machining is greater than or equal to -0.02mm and less than or equal to 0.02mm.

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