Niobium flange sealing groove processing method

Abstract

This invention belongs to the field of parts processing technology and discloses a method for processing niobium flange sealing grooves. The method includes the following steps: controlling a cutting tool to cut the niobium flange at the location to be processed in the sealing groove according to a preset method, while continuously pouring coolant onto the cutting tool during the cutting process; and grinding the groove wall using a grinding tool. The preset method includes the following steps: S21, controlling the cutting tool to cut the niobium flange in N segments along the width direction of the sealing groove, with each segment having a cutting width of B and a cutting depth that increases progressively in an arithmetic progression with a tolerance of H; B is 1 / N of the sealing groove width, and H is 1 / N of the sealing groove depth; S22, repeating step S21 N-1 times in a progressively decreasing arithmetic progression until the sealing groove is completed, wherein the tolerance of the number of segments is 1. This method for processing niobium flange sealing grooves can reduce tool wear, extend tool life, and ensure the processing accuracy of the sealing groove.

Description

Technical Field

[0001] This invention relates to the field of parts processing technology, and in particular to a method for processing niobium flange sealing grooves. Background Technology

[0002] Niobium flanges are flange connectors made primarily of the rare metal niobium. With their excellent high-temperature resistance and strong corrosion resistance, they have demonstrated irreplaceable advantages in high-end technology fields such as aerospace, nuclear energy, chemical and petroleum, and medical equipment.

[0003] Currently, the manufacturing process of niobium flanges mainly includes three key stages: forging, casting, and machining. Among these, the machining stage requires the precision machining of the sealing groove on the end face of the niobium flange. As a crucial component for installing the gasket, the machining quality of the sealing groove directly affects the sealing performance of the niobium flange connection, thus placing extremely high demands on the machining accuracy of the niobium flange sealing groove. However, metallic niobium itself possesses characteristics such as high hardness, high melting point, and easy oxidation. These characteristics not only significantly increase the difficulty of high-precision machining of the sealing groove but also accelerate tool wear during the machining process, drastically shortening tool life and posing a severe challenge to actual production.

[0004] Therefore, there is an urgent need for a method for processing niobium flange sealing grooves to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a method for machining niobium flange sealing grooves, which can reduce tool wear, extend tool life, ensure machining accuracy of sealing grooves, and improve the yield of niobium flanges.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A method for machining a niobium flange sealing groove is provided, including the following steps:

[0008] S1. Install the niobium flange to be processed onto the processing equipment;

[0009] S2. Control the cutting tool of the processing equipment to cut the niobium flange at the position to be processed in the sealing groove according to the preset method, and continuously pour coolant into the cutting tool during the cutting process;

[0010] The preset method includes the following steps:

[0011] S21. Control the tool to cut the niobium flange in N segments along the width direction of the sealing groove, and the cutting width of each segment is B, and the cutting depth of each segment increases gradually in an arithmetic sequence with a tolerance of H; where B is 1 / N of the width of the sealing groove, H is 1 / N of the depth of the sealing groove, and N is a positive integer greater than 1.

[0012] S22. Repeat step S21 for a total of N-1 times in such a way that the number of segments decreases in an arithmetic progression until the sealing groove is completed. The tolerance of the number of segments is 1.

[0013] S3. Use a grinding tool to grind the wall of the sealing groove.

[0014] Optionally, in step S21, the tool cuts a stepped groove on the niobium flange, the stepped groove comprising N groove segments;

[0015] The preset method includes the following steps:

[0016] S21110. Control the tool to cut the niobium flange in N segments along the width direction of the sealing groove, with the cutting width of each segment being B and the cutting depth of each segment increasing step by step in an arithmetic progression with a tolerance of H.

[0017] S21120. Measure the width value D1 of each slot segment and determine whether there is a first difference between each D1 and B. If so, set the slot segment with different D1 and B as the first error segment, and execute steps S22111 and S22112 in sequence. If not, execute step S22120 directly.

[0018] S22111. Determine the position of the first error segment, control the tool to cut the niobium flange in N-1 segments along the width direction of the sealing groove, the cutting width of each segment is B, and the cutting depth of each segment increases gradually in an arithmetic progression with a tolerance of H. At the first error segment, change the cutting width of the tool to X1, where X1 is the absolute value of the difference between B and the first difference.

[0019] S22112. Repeat steps S21110 and S21120 for a total of N-2 times, starting from N-2 and decreasing in an arithmetic sequence, until the sealing groove is completed.

[0020] S22120. Repeat steps S21110 and S21120 N-1 times in a manner in which the number of segments decreases in an arithmetic progression until the sealing groove is processed.

[0021] Optionally, in step S21, the tool cuts a stepped groove on the niobium flange, the stepped groove comprising N groove segments;

[0022] The preset method includes the following steps:

[0023] S21210. Control the tool to cut the niobium flange in N segments along the width direction of the sealing groove, with the cutting width of each segment being B and the cutting depth of each segment increasing step by step in an arithmetic progression with a tolerance of H.

[0024] S21220. Measure the depth value D2 of each groove segment and determine whether there is a second difference between each D2 and H. If so, set the groove segment with different D2 and H as the second error segment, and execute steps S22211 and S22212 in sequence. If not, execute step S22220 directly.

[0025] S22211. Determine the position of the second error segment, control the tool to cut the niobium flange in N-1 segments along the width direction of the sealing groove, the cutting width of each segment is B, and the cutting depth of each segment increases step by step in an arithmetic sequence with a tolerance of H. At the second error segment, change the cutting depth of the tool to X2, where X2 is the absolute value of H minus the second difference.

[0026] S22212. Repeat steps S21210 and S21220 for a total of N-2 times, starting from N-2 and decreasing in an arithmetic sequence, until the sealing groove is completed.

[0027] S22220. Repeat steps S21210 and S21220 N-1 times in a manner in which the number of segments decreases in an arithmetic progression until the sealing groove is processed.

[0028] Optionally, in step S21, after each section is cut, the tool is moved to the top of the niobium flange.

[0029] Optionally, the processing equipment includes a support and a cutting tool detachably mounted on the support;

[0030] Before step S1, the following steps are also included: select a cutting tool according to the material of the niobium flange and the width of the sealing groove. The width of the cutting tool is 0.2mm to 2.0mm smaller than the width of the sealing groove, and install the cutting tool onto the bracket.

[0031] Optionally, before step S2, the following steps are also included: determining the feed rate, depth of cut, and cutting speed of the tool based on the width and depth of the sealing groove to be machined;

[0032] In step S2, the tool is controlled to cut the niobium flange based on the feed rate, depth of cut, and cutting speed.

[0033] Optionally, step S3 specifically includes the following steps: controlling the grinding tool to rotate at a preset speed to grind the wall of the sealing groove.

[0034] Optionally, the preset speed range is 100 r / min to 300 r / min.

[0035] Optionally, the cutting tool can be made of cemented carbide, ceramic, or diamond.

[0036] Optionally, sanding tools can be made of felt-backed sandpaper.

[0037] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0038] This invention provides a method for machining niobium flange sealing grooves. During the cutting process, continuously pouring coolant into the tool helps reduce the surface temperature of the tool, decreases tool wear, maintains the stability of tool hardness, and improves tool life. When cutting according to the preset method, the tool can machine the sealing groove in a layered and segmented manner, significantly reducing the width and depth of each cut. This reduces the reverse force of the niobium flange on the tool, effectively reducing tool deformation and vibration amplitude of the machining equipment. This not only further extends the tool's life but also facilitates precise cutting, ensuring the shape and positional accuracy of the machined sealing groove and improving the yield of niobium flanges. Attached Figure Description

[0039] Figure 1 This is a first flowchart of the niobium flange sealing groove processing method provided by the present invention;

[0040] Figure 2 This is a second flowchart of the niobium flange sealing groove processing method provided by the present invention;

[0041] Figure 3 The third flowchart of the niobium flange sealing groove processing method provided by the present invention;

[0042] Figure 4A A schematic diagram showing the first groove machined on the niobium flange according to the niobium flange sealing groove processing method provided by the present invention;

[0043] Figure 4B A schematic diagram showing the second groove machined on the niobium flange according to the niobium flange sealing groove processing method provided by the present invention;

[0044] Figure 4C This is a schematic diagram showing the niobium flange sealing groove machining method provided by the present invention after the sealing groove is machined on the niobium flange.

[0045] In the picture:

[0046] 100. Niobium flange;

[0047] 200. Knives;

[0048] 300, sealing groove; 301, first groove; 302, second groove; 303, third groove. Detailed Implementation

[0049] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0050] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0052] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0053] like Figures 1 to 4C As shown, this embodiment provides a method for machining a niobium flange sealing groove, which can reduce the wear of the tool 200, extend the service life of the tool 200, ensure the machining accuracy of the sealing groove 300, and improve the yield of the niobium flange 100.

[0054] See Figure 1 The machining method for the niobium flange sealing groove includes the following steps:

[0055] S1. Install the niobium flange 100 to be processed onto the processing equipment;

[0056] S2. The cutting tool 200 of the control processing equipment cuts the niobium flange 100 at the position to be processed in the sealing groove 300 according to the preset method, and continuously pours coolant into the cutting tool 200 during the cutting process.

[0057] The preset method includes the following steps:

[0058] S21, Control the tool 200 along the width direction of the sealing groove 300 ( Figure 4A The niobium flange 100 is cut into N segments in the X direction, with each segment having a cutting width of B and a cutting depth that increases progressively in an arithmetic progression with a tolerance of H. Here, B is 1 / N of the width of the sealing groove 300, H is 1 / N of the depth of the sealing groove 300, and N is a positive integer greater than 1.

[0059] S22. Repeat step S21 for a total of N-1 times in such a way that the number of segments decreases in an arithmetic progression until the sealing groove 300 is completed. The tolerance of the number of segments is 1.

[0060] S3. Use a grinding tool to grind the wall of the sealing groove 300.

[0061] The niobium flange sealing groove machining method provided in this embodiment utilizes continuous cooling liquid pouring onto the cutting tool 200 during the cutting process. This helps reduce the surface temperature of the cutting tool 200, decreases its wear, maintains the stability of its hardness, and improves its service life. When cutting according to the preset method, the cutting tool 200 can machine the sealing groove 300 in a layered and segmented manner. This significantly reduces the width and depth of each cut, decreasing the reverse force exerted by the niobium flange 100 on the cutting tool 200. This effectively reduces the deformation of the cutting tool 200 and the vibration amplitude of the machining equipment, further extending the service life of the cutting tool 200. It also facilitates precise cutting, ensuring the shape and positional accuracy of the machined sealing groove 300 and improving the yield of the niobium flange 100.

[0062] In this embodiment, see Figure 4A , Figure 4B and Figure 4C N equals 2, and step S2 specifically includes the following steps:

[0063] Based on the position of the sealing groove 300 to be machined, control the tool 200 along the width direction of the sealing groove 300. Figure 4A The length of B is cut simultaneously from the end face of the niobium flange 100 downwards in the X direction. Figure 4A The depth of cutting H in the Y direction (in the middle) forms the first groove 301 on the niobium flange 100;

[0064] According to the position to be processed in the sealing groove 300, the tool 200 is controlled to cut a length B along the width direction of the sealing groove 300 from the side wall of the first groove 301 and simultaneously cut a depth 2H downward from the end face of the niobium flange 100, forming a second groove 302 that communicates with the first groove 301 on the niobium flange 100.

[0065] According to the position to be processed in the sealing groove 300, the tool 200 is controlled to cut the length B along the width direction of the sealing groove 300 and cut the depth H downward from the bottom wall of the first groove 301. A third groove 303 is formed on the niobium flange 100, which is connected to both the first groove 301 and the second groove 302. The first groove 301, the second groove 302 and the third groove 303 constitute the sealing groove 300.

[0066] In other embodiments, N is greater than 2, and step S2 specifically includes the following steps:

[0067] The control tool 200 cuts the niobium flange 100 in N segments along the width direction of the sealing groove 300, and the cutting width of each segment is B, and the cutting depth of each segment increases step by step in an arithmetic sequence with a tolerance of H.

[0068] The control tool 200 cuts the niobium flange 100 in N-1 segments along the width direction of the sealing groove 300, and the cutting width of each segment is B, and the cutting depth of each segment increases step by step in an arithmetic sequence with a tolerance of H.

[0069] The control tool 200 cuts the niobium flange 100 in N-2 segments along the width direction of the sealing groove 300, and the cutting width of each segment is B, and the cutting depth of each segment increases step by step in an arithmetic sequence with a tolerance of H.

[0070] This process continues until the Nth cut is performed.

[0071] Optionally, see Figure 2 In step S21, the tool 200 cuts a stepped groove on the niobium flange 100, and the stepped groove includes N groove segments.

[0072] The preset method includes the following steps:

[0073] S21110, the control tool 200 cuts the niobium flange 100 in N segments along the width direction of the sealing groove 300, and the cutting width of each segment is B, and the cutting depth of each segment increases step by step in an arithmetic sequence with a tolerance of H.

[0074] S21120. Measure the width value D1 of each slot segment and determine whether there is a first difference between each D1 and B. If so, set the slot segment with different D1 and B as the first error segment, and execute steps S22111 and S22112 in sequence. If not, execute step S22120 directly.

[0075] S22111. Determine the position of the first error segment, control the tool 200 to cut the niobium flange 100 in N-1 segments along the width direction of the sealing groove 300, the cutting width of each segment is B, and the cutting depth of each segment increases gradually in an arithmetic progression with a tolerance of H. At the first error segment, change the cutting width of the tool 200 to X1, where X1 is the absolute value of the difference between B and the first difference.

[0076] S22112. Repeat steps S21110 and S21120 for a total of N-2 times, starting from N-2 and decreasing in an arithmetic sequence, until the sealing groove 300 is processed.

[0077] S22120. Repeat steps S21110 and S21120 N-1 times in a manner in which the number of segments decreases in an arithmetic progression until the sealing groove 300 is processed.

[0078] This operation allows workers to monitor the cutting process in real time and adjust the cutting width accordingly to compensate for errors at each step, significantly improving the machining accuracy of the sealing groove 300.

[0079] Optionally, see Figure 3 In step S21, the tool 200 cuts a stepped groove on the niobium flange 100, and the stepped groove includes N groove segments.

[0080] The preset method includes the following steps:

[0081] S21210, the control tool 200 cuts the niobium flange 100 in N segments along the width direction of the sealing groove 300, and the cutting width of each segment is B, and the cutting depth of each segment increases step by step in an arithmetic sequence with a tolerance of H.

[0082] S21220. Measure the depth value D2 of each groove segment and determine whether there is a second difference between each D2 and H. If so, set the groove segment with different D2 and H as the second error segment, and execute steps S22211 and S22212 in sequence. If not, execute step S22220 directly.

[0083] S22211. Determine the position of the second error segment, control the tool 200 to cut the niobium flange 100 in N-1 segments along the width direction of the sealing groove 300, the cutting width of each segment is B, and the cutting depth of each segment increases step by step in an arithmetic sequence with a tolerance of H. At the second error segment, change the cutting depth of the tool 200 to X2, where X2 is the absolute value of the difference between H and the second difference.

[0084] S22212. Repeat steps S21210 and S21220 for a total of N-2 times, starting from N-2 and decreasing in an arithmetic sequence, until the sealing groove 300 is processed.

[0085] S22220. Repeat steps S21210 and S21220 N-1 times in a manner in which the number of segments decreases in an arithmetic progression until the sealing groove 300 is processed.

[0086] This operation allows workers to monitor the cutting process in real time and adjust the cutting depth promptly based on the monitoring results to compensate for errors at each step, significantly improving the machining accuracy of the sealing groove 300.

[0087] Optionally, in step S21, after each cutting segment, the tool 200 is moved above the niobium flange 100. This operation allows the tool 200 to temporarily leave the niobium flange 100 after completing a cutting segment. On the one hand, this avoids collisions between the tool 200 and the machined or unmachined parts of the niobium flange 100, preventing damage to the tool 200, scratches on the sealing groove 300 surface, and scrapping of the niobium flange 100. On the other hand, it provides a certain cutting clearance for the tool 200, which helps to reduce the temperature of the tool 200, reduce tool wear, and thus extend the service life of the tool 200.

[0088] Optionally, the machining equipment includes a support and a cutting tool 200 detachably mounted on the support; before step S1, the following steps are also included: selecting the cutting tool 200 according to the material of the niobium flange 100 and the width of the sealing groove 300, wherein the width of the cutting tool 200 is 0.2mm to 2.0mm smaller than the width of the sealing groove 300, and installing the cutting tool 200 onto the support. Niobium metal has high hardness, and if a conventional cutting tool 200 is used, it will wear out quickly; therefore, a suitable cutting tool 200 needs to be selected before cutting. Furthermore, the cutting force on the cutting tool 200 can be reduced by optimizing the geometric parameters of the cutting tool 200, such as the rake angle, clearance angle, and inclination angle, thereby improving the service life of the cutting tool 200.

[0089] When the width of the tool 200 is less than the width of the groove, the tool 200 will not directly contact the groove wall during cutting. This avoids damage to the groove wall or dimensional deviations caused by overcutting or interference of the tool 200, helping to ensure the geometric shape and dimensional accuracy of the sealing groove 300 and meeting the requirements of high-precision machining. This design also reduces the length of the cutting edge involved in the cutting process, thereby reducing the cutting load, helping to reduce wear and breakage of the tool 200, and extending its service life. Furthermore, it reduces the heat generated during cutting, lowers thermal stress, reduces the risk of thermal deformation, helps maintain the geometric shape and dimensional stability of the tool 200, and further improves machining accuracy.

[0090] For example, the width of the cutter 200 is 0.5 mm to 1.0 mm smaller than the width of the sealing groove 300.

[0091] Optionally, before step S2, the following steps are also included: determining the feed rate, depth of cut, and cutting speed of the tool 200 based on the width and depth of the sealing groove 300 to be machined; in step S2, the tool 200 is controlled to cut the niobium flange 100 based on the feed rate, depth of cut, and cutting speed. An excessively large depth of cut will increase the cutting force, leading to accelerated wear of the tool 200, and may even cause the tool 200 to break. Therefore, it is necessary to reasonably select the depth of cut based on the depth of the sealing groove 300 to ensure the normal service life and machining stability of the tool 200. The size of the feed rate directly affects the thickness of the cutting layer and the cutting force. An excessively large feed rate will increase the thickness of the cutting layer, resulting in increased surface roughness; an excessively small feed rate will make the cutting process unstable, easily generating vibration and ripples. Therefore, it is necessary to accurately control the feed rate based on the width of the sealing groove 300 and the machining requirements to obtain the best surface quality. An excessively high cutting speed will lead to increased cutting force and cutting temperature, resulting in thermal deformation and residual stress on the surface of the sealing groove 300, affecting the sealing performance; an excessively low cutting speed will lead to low machining efficiency. Therefore, it is necessary to select an appropriate cutting speed for machining.

[0092] For example, the feed rate is in the range of 0.007 mm / r to 0.010 mm / r, the depth of cut is in the range of 0.15 mm to 0.20 mm, and the cutting speed is in the range of 80 r / min to 100 r / min.

[0093] Optionally, step S3 specifically includes the following steps: controlling the grinding tool to rotate at a preset speed to grind the wall of the sealing groove 300. A stable speed ensures uniform contact between the grinding tool and the surface of the sealing groove 300 wall, avoiding localized over-grinding or under-grinding caused by speed fluctuations, resulting in a more consistent surface roughness. Moreover, controlling the speed can also reduce the vibration amplitude of the niobium flange 100 and reduce defects on the surface of the sealing groove 300 wall, which is crucial for ensuring the surface quality of the sealing groove 300 wall.

[0094] In this embodiment, the preset rotation speed ranges from 100 r / min to 300 r / min. Rotating the grinding tool within this range allows for precise control of its deburring force, preventing over-grinding that could lead to dimensional deviations and helping to ensure the precision of the sealing groove 300 machining. Furthermore, rotating within this range reduces vibration and inertia of the grinding tool, lowering safety risks during the machining process.

[0095] For example, the preset rotation speed of the grinding tool is 200 r / min.

[0096] Optionally, the cutting tool 200 is made of cemented carbide, ceramic, or diamond. Cutting tools 200 made of these materials possess high hardness and wear resistance, enabling them to withstand the high stress and wear during the cutting of the niobium flange 100, maintaining the sharpness and cutting performance of the tool 200, and extending its service life. Furthermore, they maintain good hardness and cutting performance at high temperatures, making them suitable for the high-temperature environment generated during the cutting of the niobium flange 100, reducing cutting errors caused by thermal deformation.

[0097] Optionally, felt-backed sandpaper can be used for polishing. During the cutting process, burrs and flash may be generated on the edge of the sealing groove 300. These not only affect the appearance of the niobium flange 100 but may also pose safety hazards during use. Polishing with felt-backed sandpaper can effectively remove these burrs and flash, making the edge of the sealing groove 300 smoother and neater. The groove wall of the sealing groove 300 after cutting may have defects such as unevenness and scratches. Polishing with felt-backed sandpaper can gradually smooth out these defects, making the surface of the sealing groove 300 smoother and improving processing accuracy. Moreover, the felt-backed design allows the sandpaper to be easily attached to the processing equipment, improving polishing efficiency and convenience.

[0098] For example, 180# sandpaper with a felt back is used. 180# sandpaper is a medium grit sandpaper, neither too coarse nor too fine, suitable for initial surface smoothing and removing minor imperfections.

[0099] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method of machining a niobium flange seal groove, characterized by, Includes the following steps: S1. Install the niobium flange (100) to be processed onto the processing equipment; S2. Control the cutting tool (200) of the processing equipment to cut the niobium flange (100) at the position to be processed in the sealing groove (300) according to a preset method, and continuously pour coolant into the cutting tool (200) during the cutting process; The preset method includes the following steps: S21. Control the cutting tool (200) to cut the niobium flange (100) in N segments along the width direction of the sealing groove (300), and the cutting width of each segment is B, and the cutting depth of each segment increases gradually in an arithmetic progression with a tolerance of H; where B is 1 / N of the width of the sealing groove (300), H is 1 / N of the depth of the sealing groove (300), and N is a positive integer greater than 1; S22. Repeat step S21 for a total of N-1 times in such a way that the number of segments decreases in an arithmetic progression until the sealing groove (300) is completed, wherein the tolerance of the number of segments is 1; S3. Use a grinding tool to grind the wall of the sealing groove (300).

2. The method for processing niobium flange sealing grooves according to claim 1, characterized in that, In step S21, the cutting tool (200) cuts a stepped groove on the niobium flange (100), the stepped groove comprising N groove segments; The preset method includes the following steps: S21110. Control the cutting tool (200) to cut the niobium flange (100) in N segments along the width direction of the sealing groove (300), and the cutting width of each segment is B, and the cutting depth of each segment increases step by step in an arithmetic sequence with a tolerance of H. S21120. Measure the width value D1 of each of the slot segments and determine whether there is a first difference between each D1 and B. If so, set the slot segment with different D1 and B as the first error segment, and execute steps S22111 and S22112 in sequence. If not, execute step S22120 directly. S22111. Determine the position of the first error segment, control the tool (200) to cut the niobium flange (100) in N-1 segments along the width direction of the sealing groove (300), the cutting width of each segment is B, the cutting depth of each segment increases gradually in an arithmetic sequence with a tolerance of H, and at the first error segment, change the cutting width of the tool (200) to X1, where X1 is the absolute value of the difference between B and the first difference; S22112. Repeat steps S21110 and S21120 for a total of N-2 times, starting from N-2 and decreasing in an arithmetic sequence, until the sealing groove (300) is processed. S22120. Repeat steps S21110 and S21120 N-1 times in a manner in which the number of segments decreases in an arithmetic sequence until the sealing groove (300) is processed.

3. The method for processing niobium flange sealing grooves according to claim 1, characterized in that, In step S21, the cutting tool (200) cuts a stepped groove on the niobium flange (100), the stepped groove comprising N groove segments; The preset method includes the following steps: S21210. Control the cutting tool (200) to cut the niobium flange (100) in N segments along the width direction of the sealing groove (300), and the cutting width of each segment is B, and the cutting depth of each segment increases gradually in an arithmetic sequence with a tolerance of H. S21220. Measure the depth value D2 of each of the groove segments and determine whether there is a second difference between each D2 and H. If so, set the groove segment with different D2 and H as the second error segment, and execute steps S22211 and S22212 in sequence. If not, execute step S22220 directly. S22211. Determine the position of the second error segment, control the tool (200) to cut the niobium flange (100) in N-1 segments along the width direction of the sealing groove (300), the cutting width of each segment is B, the cutting depth of each segment increases step by step in an arithmetic sequence with a tolerance of H, and at the second error segment, change the cutting depth of the tool (200) to X2, where X2 is the absolute value of H minus the second difference; S22212. Repeat steps S21210 and S21220 for a total of N-2 times, starting from N-2 and decreasing in an arithmetic sequence, until the sealing groove (300) is processed. S22220. Repeat steps S21210 and S21220 N-1 times in a manner in which the number of segments decreases in an arithmetic sequence until the sealing groove (300) is processed.

4. The method for processing niobium flange sealing grooves according to claim 1, characterized in that, In step S21, after each section is cut, the tool (200) is moved above the niobium flange (100).

5. The method for processing niobium flange sealing grooves according to claim 1, characterized in that, The processing equipment includes a support and the cutting tool (200) detachably mounted on the support; Before step S1, the following steps are also included: selecting the cutting tool (200) according to the material of the niobium flange (100) and the width of the sealing groove (300), wherein the width of the cutting tool (200) is 0.2mm to 2.0mm smaller than the width of the sealing groove (300), and installing the cutting tool (200) onto the bracket.

6. The method for processing a niobium flange sealing groove according to any one of claims 1-5, characterized in that, Before step S2, the following steps are also included: determining the feed rate, depth of cut, and cutting speed of the tool (200) based on the width and depth of the sealing groove (300) to be machined; In step S2, the tool (200) is controlled to cut the niobium flange (100) according to the feed rate, the depth of cut, and the cutting speed.

7. The method for processing a niobium flange sealing groove according to any one of claims 1-5, characterized in that, Step S3 specifically includes the following steps: controlling the grinding tool to rotate at a preset speed to grind the groove wall of the sealing groove (300).

8. The method for processing the niobium flange sealing groove according to claim 7, characterized in that, The preset rotation speed range is 100 r / min to 300 r / min.

9. The method for processing a niobium flange sealing groove according to any one of claims 1-5, characterized in that, The cutting tool (200) is made of cemented carbide, ceramic or diamond.

10. The method for processing a niobium flange sealing groove according to any one of claims 1-5, characterized in that, The polishing tool is made of felt-backed sandpaper.

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