Method for fabricating catheters

Abstract

This disclosure provides a method for manufacturing a guide vane, belonging to the field of machining technology. The method includes: machining multiple guide vane preforms; coaxially welding an intermediate flange to the outer center of an annular inner plate to form an inner plate assembly; coaxially positioning and assembling a suspension connecting flange, the inner plate assembly, and the guide vane shaft together, such that the suspension connecting flange is located at the first end of the inner plate and both the suspension connecting flange and the inner plate assembly are fitted outside the guide vane shaft; for each guide vane preform, positioning and installing the guide vane preform between the inner plate assembly and the guide vane shaft using clamping sections, with the two non-clamping sections respectively fitting against the inner wall of the inner plate and the outer wall of the guide vane shaft; welding the guide vane preform to the inner plate and the guide vane shaft respectively to obtain a welded component; and machining each clamping section of the welded component to obtain the guide vane. This disclosure can improve machining accuracy.

Description

Technical Field

[0001] This disclosure belongs to the field of machining technology, and specifically relates to a method for manufacturing a conduit. Background Technology

[0002] An electric propulsion system is a type of propulsion device that uses the rotation of an electric motor rotor to directly drive the propeller blades to perform work. The stator of the electric motor is located inside the duct, and the rotor and propeller blades are integrated into one unit. When the electric motor is working, it can directly drive the propeller blades to perform work, thereby enabling the ship to navigate. The part of the duct containing the propeller blades can be called the forward duct. The forward duct includes a duct shaft, an annular outer frame, and guide vanes. The annular outer frame is coaxially fitted around the duct shaft, and multiple circumferentially distributed guide vanes are connected between the inner wall of the annular outer frame and the outer wall of the duct shaft.

[0003] In related technologies, when processing the front guide tube, the various components of the front guide tube (including the inner plate, guide vane, intermediate flange, etc.) are generally processed separately, and then the guide vane, inner plate and intermediate flange are positioned and assembled together by positioning components, and the guide tube is obtained by welding.

[0004] However, when welding the guide vane between the guide tube shaft and the inner plate, the guide vane needs to be clamped and positioned. Because the machined guide vane has a curved surface, it is difficult to clamp, increasing the welding difficulty. Furthermore, unstable clamping of the guide vane may cause deformation, resulting in poor precision of the welded guide tube. Summary of the Invention

[0005] This disclosure provides a method for manufacturing a catheter, which can reduce the processing difficulty of the catheter while improving processing accuracy. The technical solution is as follows:

[0006] This disclosure provides a method for manufacturing a guide vane, the method comprising: processing multiple guide vane preforms, each guide vane preform including a clamping section and two non-clamping sections, wherein the two ends of the clamping section are respectively connected to the two non-clamping sections, the clamping section is a rectangular structure, and the outer surface of the non-clamping sections is curved, and the curvature value of the outer surface of the non-clamping sections meets the curvature value requirements of the guide vane; coaxially welding an intermediate flange to the outer part of the middle of an annular inner plate to form an inner plate assembly, wherein the inner diameter of the inner hole of the inner plate gradually increases from the first end to the second end of the inner plate; and further... The suspension connecting flange, the inner plate assembly, and the guide shaft are coaxially positioned and assembled together, such that the suspension connecting flange is located at the first end of the inner plate, and both the suspension connecting flange and the inner plate assembly are fitted outside the guide shaft. For each guide vane preform, the guide vane preform is positioned and installed between the inner plate assembly and the guide shaft by the clamping section, and the two non-clamping sections are respectively attached to the inner wall of the inner plate and the outer wall of the guide shaft. The guide vane preform is welded to the inner plate and the guide shaft respectively to obtain a welded part. Each clamping section in the welded part is machined to obtain the guide shaft.

[0007] In another implementation of this disclosure, the processing of multiple guide vane preforms includes: the clamping section being the smallest circumscribed rectangle of the shape formed after the clamping section has been machined.

[0008] In another implementation of this disclosure, the step of coaxially positioning and assembling the suspension connecting flange, the inner plate assembly, and the guide shaft together includes: coaxially positioning and assembling the guide shaft and the suspension connecting flange together using a positioning assembly, such that the suspension connecting flange is fitted over the guide shaft; and coaxially positioning the inner plate assembly on one side of the suspension connecting flange, with the end face of the first end of the inner plate abutting against the suspension connecting flange.

[0009] In another implementation of this disclosure, the positioning component includes a positioning plate with an annular positioning groove near its outer periphery and a stepped hole in the middle. The larger inner diameter end of the stepped hole faces the same direction as the opening of the positioning groove, and the positioning groove is coaxial with the stepped hole. The step of coaxially positioning and assembling the guide shaft and the suspension connecting flange together using the positioning component includes: engaging the middle part of the guide shaft in the stepped hole; and engaging the suspension connecting flange in the positioning groove.

[0010] In another implementation of this disclosure, the positioning assembly further includes a connecting ring and a plurality of positioning block groups. The connecting ring is connected to the side where the openings of the positioning plate and the positioning groove face the same direction. The connecting ring is coaxial with the positioning groove and is located within the annulus containing the positioning groove. The plurality of positioning block groups are arranged one-to-one with the plurality of guide vane preforms, and each of the plurality of positioning block groups includes two positioning blocks. Positioning and installing the guide vane preform between the inner plate assembly and the guide shaft through the clamping section, and the two non-clamping sections respectively abutting the inner wall of the inner plate and the outer wall of the guide shaft, includes: positioning the first positioning block in each of the positioning block groups circumferentially about the axis of the guide shaft. The guide vane preforms are evenly distributed on the connecting ring and connected to the connecting ring; the plurality of guide vane preforms are evenly distributed circumferentially between the guide shaft and the inner plate with the axis of the guide shaft as the axis, such that the first side of each clamping segment is in contact with the first positioning block in the corresponding positioning block group, and such that the two non-clamping segments of each guide vane preform are in contact with the inner wall of the inner plate and the outer wall of the guide shaft, respectively; the second positioning block of the positioning block group corresponding to the guide vane preform is fixed on the connecting ring, such that the second positioning block of the positioning block group is in contact with the second side of the clamping segment in the corresponding guide vane preform, wherein the first side and the second side of the clamping segment are respectively the two opposite sides of the clamping segment along the circumference of the guide shaft.

[0011] In another implementation of this disclosure, the positioning component further includes multiple limiting block groups and multiple positioning pins, wherein each of the multiple limiting block groups corresponds one-to-one with the multiple positioning block groups, and each of the multiple limiting block groups includes two limiting blocks, each of the two limiting blocks having a limiting groove; the step of positioning and installing the guide vane preform between the inner plate assembly and the guide shaft through the clamping section, and wherein the two non-clamping sections are respectively in contact with the inner wall of the inner plate and the outer wall of the guide shaft, further includes: connecting the two limiting blocks in the limiting block group to the corresponding... On two positioning blocks in a positioning block group, and the limiting block is located on the side of the connected positioning block away from the connecting ring. Along the circumferential direction of the guide vane preform, the first side and the second side of the clamping section of each guide vane preform are respectively located in the limiting groove of the two limiting blocks in the corresponding limiting block group; one end of the positioning pin is inserted into the clamping section of the corresponding guide vane preform, and the other end of the positioning pin is connected to one of the positioning blocks in the corresponding positioning block group. The length direction of the positioning pin is the radial direction of the guide vane preform connected to the guide vane shaft.

[0012] In another implementation of this disclosure, the manufacturing method further includes: processing two sector plates to obtain two semi-cones; welding the two semi-cones together to obtain the inner plate, wherein the conical holes formed inside the two semi-cones are the inner holes; and processing the outer wall of the inner plate to make the outer wall of the inner plate curved.

[0013] In another implementation of this disclosure, the manufacturing method further includes: welding a plurality of ear-shaped outer plates onto the inner plate and the intermediate flange, such that the plurality of ear-shaped outer plates are distributed circumferentially along the inner plate, and one end of each ear-shaped outer plate is connected to the second end of the inner plate, and the other end of the ear-shaped outer plate is connected to the end face of the intermediate flange; welding an outer cylinder plate onto the intermediate flange and the suspension connecting flange, such that the outer cylinder plate is coaxially sleeved on the inner plate and the intermediate flange, and the first end of the outer cylinder plate is connected to the outer peripheral wall of the intermediate flange, and the second end of the outer cylinder plate is connected to the suspension connecting flange.

[0014] In another implementation of this disclosure, the step of machining each clamping segment in the welded component to obtain the guide tube includes: machining each clamping segment of the guide vane preform so that the outer surface of the clamping segment is a curved surface that meets the surface shape requirements of the guide vane.

[0015] In another implementation of this disclosure, the manufacturing method further includes: machining the inner hole of the inner plate so that the inner wall of the inner plate is a curved surface that meets the surface shape requirements of the inner hole of the conduit.

[0016] The beneficial effects of the technical solutions provided in this disclosure are:

[0017] In the manufacturing method provided by this disclosure, when processing the guide vane, the guide vane preform is first processed, including a clamping section and a non-clamping section. Then, multiple components such as the intermediate flange, inner plate, suspension connecting flange, and guide shaft are assembled together. Next, each guide vane preform is positioned and installed between the guide shaft and the inner plate assembly using the clamping section. When positioning and assembling the guide vane preform, because a rectangular clamping section is pre-reserved in the middle of the preform, while the two ends of the guide vane are non-clamping sections that meet the guide vane profile values, the rectangular clamping section positions the guide vane preform when positioning it with the inner plate (with the welded intermediate flange), suspension connecting flange, and guide shaft. This not only facilitates positioning but also improves positioning accuracy, thereby improving the processing accuracy of the guide shaft. Furthermore, since the preformed guide vane is not directly clamped during clamping, clamping deformation of the guide vane is reduced.

[0018] In other words, the manufacturing method provided in this embodiment first processes the guide vane preform, making the middle part of the guide vane preform a rectangular clamping section, rather than directly processing the guide vane. Therefore, the positioning accuracy can be improved by arranging the clamping section, thereby improving the processing accuracy. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a catheter provided in an embodiment of this disclosure;

[0021] Figure 2 This is a flowchart of a method for manufacturing a catheter according to an embodiment of this disclosure;

[0022] Figure 3 This is a flowchart of another method for manufacturing a catheter provided in this disclosure embodiment;

[0023] Figure 4 This is a schematic diagram of the first stage of the processing of the inner plate provided in this embodiment of the disclosure;

[0024] Figure 5 This is a schematic diagram of the second stage of the processing of the inner plate provided in this embodiment of the disclosure;

[0025] Figure 6 This is a schematic diagram of the assembly of the inner plate and the intermediate flange provided in an embodiment of this disclosure;

[0026] Figure 7 This is a schematic diagram of the guide vane structure provided in an embodiment of this disclosure;

[0027] Figure 8 This is a schematic diagram of the positioning component for positioning and assembling the guide shaft, etc., provided in an embodiment of this disclosure;

[0028] Figure 9 This is a schematic diagram of the positioning assembly of the inner plate, etc. provided in the embodiments of this disclosure;

[0029] Figure 10 This is a schematic diagram of the positioning assembly of the positioning component, guide vane, etc., provided in the embodiments of this disclosure;

[0030] Figure 11 yes Figure 10 Top view;

[0031] Figure 12 yes Figure 11An enlarged view of the assembly of one of the guide vane preforms;

[0032] Figure 13 This is a schematic diagram of an inner plate with an outer ear-shaped plate welded to it, as provided in an embodiment of this disclosure;

[0033] Figure 14 This is a schematic diagram of an outer cylinder plate welded to the inner plate according to an embodiment of this disclosure.

[0034] The symbols in the diagram represent the following meanings:

[0035] 101. Guide shaft; 102. Annular outer frame; 1021. Inner plate; 10210. Inner bore; 10211. Curved surface; 1201. Semi-cone; 1022. Intermediate flange; 1023. Suspension connection flange; 1024. Outer cylinder plate; 1025. Ear-shaped outer plate; 1026. First stiffener; 1027. Second stiffener; 1001. Window; 103. Guide vane; 1031. Clamping section; 1032. Non-clamping section;

[0036] 201. Positioning plate; 21. First circular plate; 22. Second circular plate; 2010. Positioning groove; 2011. Stepped hole; 203. Connecting ring; 204. Positioning block assembly; 2041. Positioning block; 205. Limiting block assembly; 2051. Limiting block; 2050. Limiting groove; 206. Positioning pin. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0038] In related technologies, the function of the duct in an electric propulsion device is to guide water flow into the interior of the duct at the required flow rate and direction through the arc-shaped inner wall and guide vanes during the propulsion process, thereby improving the propulsion efficiency and reducing noise.

[0039] In this embodiment of the disclosure, the conduit can be the front conduit of an electric thruster.

[0040] Figure 1 This is a schematic diagram of the structure of a catheter provided in an embodiment of this disclosure. Figure 1 As shown, the conduit includes a conduit shaft 101, an annular outer frame 102, and multiple guide vanes 103. The conduit shaft 101 and the annular outer frame 102 are arranged coaxially. The multiple guide vanes 103 are evenly arranged circumferentially between the conduit shaft 101 and the annular outer frame 102. One end of each guide vane 103 is connected to the conduit shaft 101, and the other end of each guide vane 103 is connected to the annular outer frame 102.

[0041] The annular outer frame 102 includes an annular inner plate 1021, an intermediate flange 1022, and a suspension connecting flange 1023. From the first end to the second end of the inner plate 1021, the inner diameter of the inner hole of the inner plate 1021 gradually increases. That is, the inner plate 1021 is trumpet-shaped.

[0042] The intermediate flange 1022 is coaxially sleeved on the outside of the middle part of the inner plate 1021, and the inner wall of the intermediate flange 1022 is connected to the outer wall of the inner plate 1021. The suspension connection flange 1023 is located at the first end of the inner plate 1021 and is connected to the end face of the inner plate 1021.

[0043] The annular outer frame 102 also includes an outer cylindrical plate 1024, multiple ear-shaped outer plates 1025, multiple first stiffening plates 1026, and multiple second stiffening plates 1027. The outer cylindrical plate 1024 is coaxially sleeved around the inner plate 1021 and the intermediate flange 1022, and the first end of the outer cylindrical plate 1024 is connected to the outer peripheral wall of the intermediate flange 1022. The second end of the outer cylindrical plate 1024 is connected to the suspension connecting flange 1023. The outer wall surface of the inner plate 1021, the end face of the intermediate flange 1022, the inner wall surface of the outer cylindrical plate 1024, and the end face of the suspension connecting flange 1023 form a first space.

[0044] Multiple first stiffening plates 1026 are evenly distributed circumferentially within the first space, and the inner plate 1021, intermediate flange 1022, outer cylinder plate 1024, and suspension connecting flange 1023 are all fitted and connected to the side of the first stiffening plate 1026. Among them, the first stiffening plate 1026 is a rectangular plate, that is, the first space is an annular space with a rectangular cross-section.

[0045] A window 1001 is provided on the inner plate 1021, and the window 1001 passes through the inner plate 1021 to allow communication between the first space and the external environment. A window 1001 is provided between every two adjacent first stiffeners 1026, and each window 1001 is located between adjacent guide vanes 103.

[0046] The ear-shaped outer plate 1025 corresponds one-to-one with the first stiffener 1026. One end of the ear-shaped outer plate 1025 is connected to the second end of the inner plate 1021, and the other end of the ear-shaped outer plate 1025 is connected to the end face of the intermediate flange 1022. Multiple ear-shaped outer plates 1025 are evenly distributed around the periphery. The side of the ear-shaped outer plate 1025, the end face of the intermediate flange 1022, and the outer wall of the inner plate 1021 form a second space. Each second space is provided with a second stiffener 1027. The ear-shaped outer plate 1025, the intermediate flange 1022, and the outer cylinder plate 1024 are all attached to the side of the second stiffener 1027. The first stiffener 1026 and the corresponding second stiffener 1027 are coplanar. For example, the second stiffener 1027 is a semi-elliptical plate. The straight side of the second stiffener 1027 is connected to the end face of the intermediate flange 1022. The side of the ear-shaped outer plate 1025 covers and fits the curved side of the second stiffener 1027. That is, the ear-shaped outer plate 1025, the inner plate 1021, and the intermediate flange 1022 form a space with a semi-elliptical cross-section. By dividing the annular outer frame 102 into an inner plate 1021, an intermediate flange 1022, a suspension connecting flange 1023, an outer cylinder plate 1024, an ear-shaped outer plate 1025, a first stiffener 1026, and a second stiffener 1027, a total of eight parts are constructed. In this way, when manufacturing the annular outer frame 102, each part can be assembled one by one, simplifying the assembly process.

[0047] Figure 2 This is a flowchart of a method for manufacturing a catheter according to an embodiment of this disclosure, combined with... Figure 2 This disclosure provides a method for manufacturing a catheter, which can be used to produce... Figure 1 The catheter shown. The manufacturing method includes:

[0048] S201: Processing multiple guide vane preforms.

[0049] Each guide vane preform includes a clamping section 1031 and two non-clamping sections 1032. The two ends of the clamping section 1031 are connected to the two non-clamping sections 1032 respectively. The clamping section 1031 is a rectangular structure. The outer surface of the non-clamping section 1032 is curved, and the surface curvature of the outer surface of the non-clamping section 1032 meets the surface curvature requirements of the guide vane.

[0050] The surface profile values ​​of the guide vane are used to reflect the geometry and dimensions of the guide vane. These surface profile values ​​include, but are not limited to, the maximum thickness, leading edge thickness, trailing edge thickness, chord length, chord width, and chord angle of the guide vane.

[0051] The surface curvature of the outer surface of the non-clamping section 1032 meets the surface curvature requirements of the guide vane. This means that the outer surface of the non-clamping section 1032 has the same shape as the outer surface of the part of the guide vane to which the non-clamping section 1032 belongs, and the surface curvature of the outer surface of the non-clamping section 1032 is the required dimension of the corresponding part of the guide vane.

[0052] S202: The intermediate flange is coaxially welded to the outer part of the middle of the annular inner plate to form the inner plate assembly.

[0053] S203: The suspension connecting flange, inner plate assembly and guide shaft are coaxially positioned and assembled together, so that the suspension connecting flange is located at the first end of the inner plate and both the suspension connecting flange and the inner plate assembly are fitted over the guide shaft.

[0054] S204: For each guide vane preform, the guide vane preform is positioned and installed between the inner plate assembly and the guide shaft by the clamping section, and the two non-clamping sections are respectively attached to the inner wall of the inner plate and the outer wall of the guide shaft.

[0055] S205: The guide vane preform is welded to the inner plate and the guide shaft respectively to obtain the welded part.

[0056] S206: Machining is performed on each clamping section in the welded part to obtain the conduit.

[0057] In the manufacturing method provided by this disclosure, when processing the guide vane, the guide vane preform is first processed, including a clamping section and a non-clamping section. Then, multiple components such as the intermediate flange, inner plate, suspension connecting flange, and guide shaft are assembled together. Next, each guide vane preform is positioned and installed between the guide shaft and the inner plate assembly using the clamping section. When positioning and assembling the guide vane preform, because a rectangular clamping section is pre-reserved in the middle of the preform, while the two ends of the guide vane are non-clamping sections that meet the guide vane profile values, the rectangular clamping section positions the guide vane preform when positioning it with the inner plate (with the welded intermediate flange), suspension connecting flange, and guide shaft. This not only facilitates positioning but also improves positioning accuracy, thereby improving the processing accuracy of the guide shaft. Furthermore, since the preformed guide vane is not directly clamped during clamping, clamping deformation of the guide vane is reduced.

[0058] In other words, the manufacturing method provided in this embodiment first processes the guide vane preform, making the middle part of the guide vane preform a rectangular clamping section, rather than directly processing the guide vane. Therefore, the positioning accuracy can be improved by arranging the clamping section, thereby improving the processing accuracy.

[0059] Figure 3 This is a flowchart of another method for fabricating a catheter provided in this disclosure embodiment, such as... Figure 3 As shown in the figure. This disclosure also provides a method for manufacturing a catheter, which can be used to manufacture... Figure 1 The catheter shown.

[0060] The production method includes:

[0061] S301: Processing the inner panel.

[0062] In this embodiment, the inner plate is made by processing two sector plates.

[0063] Alternatively, S301 can be implemented in the following ways:

[0064] 3011: By processing the sector plate, two semi-cones are obtained.

[0065] 3012: Two semi-cones are welded together to obtain the inner plate. The conical hole formed inside the two semi-cones is the inner hole.

[0066] Figure 4 This is a schematic diagram of the first stage of the processing of the inner panel provided in this embodiment of the disclosure, as shown below. Figure 4 As shown, two sector plates are cut into shape, and pressing lines are drawn in each sector plate. Then, each sector plate is pressed to form a semi-cone 1201.

[0067] Two semi-cones 1201 are welded together to form a straight cone, which is an annular inner plate 1021 with an inner hole.

[0068] 3013: The outer wall of the inner panel is processed to make the outer wall of the inner panel curved.

[0069] The curvature of the outer wall of the inner plate meets the requirements of the conduit.

[0070] Figure 5 This is a schematic diagram of the second stage of the processing of the inner panel provided in this embodiment of the disclosure, combined with... Figure 5 According to the drawings, the curved surface 10211 of the outer wall of the inner plate 1021 is machined so that the outer wall of the inner plate 1021 meets the curved surface value requirements.

[0071] Then, the two opposite end faces of the inner plate 1021 are machined to make them parallel to each other. The inner hole 10210 remains a straight line without any shape values.

[0072] The surface curvature of the outer wall of the inner plate 1021 meets the requirements of the guide vane, that is to say, the surface curvature of the outer wall of the inner plate 1021 is the surface curvature of the outer wall of the inner plate in the guide vane that meets the requirements.

[0073] S302: The intermediate flange is coaxially welded to the outer part of the middle of the annular inner plate to form the inner plate assembly.

[0074] Figure 6 This is a schematic diagram of the assembly of the inner plate and the intermediate flange according to an embodiment of this disclosure. See also... Figure 6The inner plate 1021 and the intermediate flange 1022 are assembled on the platform. The position and height of the intermediate flange 1022 on the inner plate 1021 are adjusted to the dimensions required in the drawing. Then, the intermediate flange 1022 is spot-welded to the middle of the outer wall of the inner plate 1021. Gas-shielded welding is used for spot welding. For example, the gas can be carbon dioxide or an inert gas. The welding material is stainless steel with a diameter not exceeding 1.5 mm. In this embodiment, the welding material is GFS-316L stainless steel with a diameter of Φ1.2 mm.

[0075] S303: Machining guide vane preforms.

[0076] Figure 7 This is a schematic diagram of the guide vane structure provided in an embodiment of this disclosure. See also: Figure 7 In this embodiment, when processing the guide vane preform, the guide vane preform is divided into a clamping section 1031 and a non-clamping section 1032. The clamping section 1031 is fabricated as a minimum rectangular shape capable of covering the corresponding portion of the guide vane. The non-clamping section is directly machined with a curved surface. The clamping section 1031 is located in the middle of the guide vane preform, and the non-clamping section 1032 is located on both sides of the guide vane preform in the areas requiring welding.

[0077] Alternatively, S303 is implemented in the following way:

[0078] 3031: The two ends of the rectangular plate along its length are processed to form non-clamping sections at both ends of the rectangular plate along its length.

[0079] 3032: The middle part of the rectangular plate is processed to form a clamping section in the middle part of the rectangular plate, and the clamping section is the smallest circumscribed rectangle of the shape formed after the clamping section is machined.

[0080] Because the guide vane has a sheet-like structure, the guide vane preform is machined by directly cutting a rectangular plate. This results in the ends of the rectangular plate being machined as non-clamping sections, while the middle section forms a circumscribed rectangular body with the smallest possible volume, capable of covering the corresponding part of the guide vane. In other words, the circumscribed rectangular body refers to the rectangular body formed in the middle of the guide vane preform, after which further cutting is not possible. If cutting continues, this rectangular body cannot be formed into a curved surface that meets the guide vane profile requirements during subsequent machining.

[0081] In addition, when machining the non-clamping section of the guide vane, it should be noted that since the inner hole of the inner plate is without curved surface value, the welding bevel of the non-clamping section welded to the inner plate 1021 is a straight bevel.

[0082] S304: Coaxially position and assemble the guide shaft and suspension connecting flange together.

[0083] Alternatively, S304 can be implemented according to the following steps:

[0084] 3041: The guide shaft 101 and the suspension connecting flange 1023 are coaxially positioned and assembled together by the positioning assembly, so that the suspension connecting flange 1023 is fitted over the guide shaft 101.

[0085] 3042: The inner panel assembly is coaxially positioned on one side of the suspension connecting flange 1023, and the end face of the first end of the inner panel 1021 is in contact with the suspension connecting flange 1023.

[0086] Figure 8 This is a schematic diagram of the positioning component used in the embodiments of this disclosure for positioning and assembling guide shafts, etc. See also Figure 8 The positioning component includes a positioning plate 201. The positioning plate 201 has an annular positioning groove 2010 near its outer periphery. The center of the positioning plate 201 has a stepped hole 2011, with the larger inner diameter end of the stepped hole 2011 facing the same direction as the opening of the positioning groove 2010. For example, the stepped hole 2011 is located on the positioning plate 201... Figure 8 On the upward-facing side, the opening of the positioning groove 2010 is also located in the positioning plate 201. Figure 8 The center-upward side. This facilitates the mounting of the guide shaft 101 and the suspension connecting flange 1023 onto the positioning plate 201 in the same direction. The positioning groove 2010 is coaxial with the stepped hole 2011.

[0087] In step 3041, when coaxially positioning and assembling the guide shaft and suspension connecting flange together using the above positioning components, it can be done in the following way:

[0088] (1) The middle part of the guide shaft is clamped in the stepped hole 2011, and the two ends of the guide shaft are located outside the stepped hole 2011 respectively.

[0089] (2) Install the suspension connecting flange 1023 into the positioning groove 2010.

[0090] This ensures that the axes of the suspension connecting flange 1023 and the guide shaft 101 are coaxial, and the distance between the stepped surface of the stepped hole 2011 and the bottom of the positioning groove 2010 also ensures the relative height between the guide shaft 101 and the suspension connecting flange 1023.

[0091] In this embodiment, one end face of the suspension connecting flange 1023 has an annular positioning protrusion located in the positioning groove 2010, thus enabling the suspension connecting flange 1023 to be snapped into the positioning groove 2010 of the positioning assembly. Similarly, the guide shaft is also limited in the stepped hole 2011 by its own structure.

[0092] In this embodiment, the positioning plate 201 includes a first circular plate 21 with a smaller outer diameter and a second circular plate 22 with a larger outer diameter. The first circular plate 21 and the second circular plate 22 are parallel to each other and fit together. A positioning groove 2010 is located on the second circular plate 22 outside the first circular plate 21. A stepped hole 2011 is formed in the middle of the first circular plate 21 and the middle of the second circular plate 22.

[0093] The distance between the stepped surface of the stepped hole 2011 and the bottom of the positioning groove 2010 is equal to the relative height between the guide shaft 101 and the suspension connection flange 1023.

[0094] S305: The inner panel assembly is coaxially positioned on one side of the suspension connection flange, and the end face of the first end of the inner panel is in contact with the suspension connection flange.

[0095] Figure 9 This is a schematic diagram of the positioning assembly of the inner plate, etc., provided in the embodiments of this disclosure. See also: Figure 9 Place the inner panel assembly horizontally on the suspension connecting flange 1023 and check that the misalignment between the inner hole of the inner panel assembly and the inner hole of the suspension connecting flange 1023 is ≤1mm.

[0096] S306: The guide vane preform is positioned and installed between the inner plate assembly and the guide shaft by means of the clamping section, and the two non-clamping sections are respectively attached to the inner wall of the inner plate and the outer wall of the guide shaft.

[0097] In this embodiment, the positioning assembly is still used when assembling the guide vane preform between the guide tube shaft and the inner plate.

[0098] Figure 10 This is a schematic diagram of the positioning assembly of the positioning component, such as guide vanes, etc., provided in the embodiments of this disclosure. Figure 10 As shown, optionally, the positioning assembly also includes a connecting ring 203 and a plurality of positioning block groups 204. The connecting ring 203 is connected to the side where the openings of the positioning plate 201 and the positioning groove 2010 face the same direction. The connecting ring 203 is coaxial with the positioning groove 2010, and the connecting ring 203 is located inside the ring in which the positioning groove 2010 is located. The center of the connecting ring 203 is coaxial with the positioning groove 2010.

[0099] Figure 11 yes Figure 10 Top view, Figure 12 yes Figure 11 An enlarged view of the assembly of one of the guide vane prefabricated components, combined with... Figure 11 and 12As shown, multiple positioning block groups 204 are arranged one-to-one with multiple guide vane prefabricated parts, and each positioning block group 204 includes two positioning blocks 2041. For any positioning block group 204, the two positioning blocks 2041 are arranged at intervals along the circumference of the connecting ring 203, and are detachably connected to the connecting ring 203.

[0100] By setting the positioning block 2041, the clamping section 1031 of each guide vane 103 can be limited, so that the opposite sides of the guide vane 103 can be limited and not move.

[0101] Moreover, the positioning block 2041 is also easy to fit with the rectangular clamping section 1031, thereby improving the clamping effect of the guide vane.

[0102] In this embodiment, the connecting ring 203 is located on the side of the positioning plate 201 facing the inner plate 1021. That is... Figure 9-10 The upper side of the center positioning plate 201.

[0103] Optionally, the positioning component further includes multiple limiting block groups 205, which correspond one-to-one with multiple positioning block groups 204 and are arranged one-to-one with multiple guide vane prefabricated parts. Each limiting block group 205 includes two limiting blocks 2051. Each of the two limiting blocks 2051 has a limiting groove 2050.

[0104] For any given set of limiting blocks 205, two limiting blocks 2051 are arranged in a one-to-one correspondence with two positioning blocks 2041 in the corresponding positioning block set 204. Each limiting block 2051 is located on the side of the corresponding positioning block 2041 away from the connecting ring 203 and is connected to the corresponding positioning block 2041. Along the circumference of the guide shaft 101, the opposite sides of the clamping section 1031 of each guide vane preform are respectively located in the two limiting grooves 2050 in the corresponding limiting block set 205. The setting of the limiting blocks 2051 can further limit the opposite sides of the clamping section 1031 of the rectangular body in the radial direction, preventing the guide vane preform from moving radially during welding and causing deformation.

[0105] In other words, the positioning function is achieved by the concave surface of the limiting groove 2050 of the limiting block 2051 contacting the outer side of the clamping section 1031 of the guide vane.

[0106] The limit block 2051 and the corresponding positioning block 2041 are fixed together by positioning pins and bolts.

[0107] Optionally, the positioning assembly also includes multiple positioning pins 206, which are arranged in a one-to-one correspondence with multiple guide vane prefabricated parts.

[0108] Each of the plurality of positioning pins 206 is connected to one of the positioning blocks 2041 in the positioning block group 204 arranged on one side of the corresponding guide vane preform. The length direction of the positioning pin 206 is the radial direction of the guide shaft 101 to which the corresponding guide vane preform is connected.

[0109] The locating pin 206 is used to prevent deformation caused by axial movement of the guide vane preform along the guide tube shaft during guide vane welding.

[0110] Alternatively, S306 can be implemented in the following ways:

[0111] 3061: The first positioning block 2041 in each positioning block group 204 is evenly distributed circumferentially on the connecting ring 203 with the axis of the guide shaft 101 as the axis, and is connected to the connecting ring 203.

[0112] First, connect the positioning block on the same side corresponding to each guide vane prefabricated component to the connecting ring 203.

[0113] 3062: Multiple guide vane preforms are evenly distributed circumferentially between the guide vane shaft 101 and the inner plate 1021 with the axis of the guide vane shaft 101 as the axis, such that the first side of each clamping section 1031 is in contact with the first positioning block 2041 in the corresponding positioning block group 204, and the two non-clamping sections 1032 of each guide vane preform are in contact with the inner wall of the inner plate 1021 and the outer wall of the guide vane shaft 101, respectively.

[0114] 3063: Fix the second positioning block 2041 of the positioning block group 204 corresponding to the guide vane preform to the connecting ring 203, and make the second positioning block 2041 of the positioning block group 204 fit against the second side of the clamping section 1031 in the corresponding guide vane preform. The first side and the second side of the clamping section 1031 are respectively the two opposite sides of the clamping section 1031 along the circumferential direction of the guide shaft 101.

[0115] 3064: Connect the two limiting blocks 2051 in the limiting block group 205 to the two positioning blocks 2041 in the corresponding positioning block group 204 respectively, and the limiting block 2051 is located on the side of the connected positioning block 2041 away from the connecting ring 203. Along the circumference of the guide shaft 101, the first side and the second side of the clamping section of each guide vane preform are respectively located in the limiting groove 2050 of the two limiting blocks in the corresponding limiting block group.

[0116] 3065: Insert one end of the positioning pin 206 into the clamping section 1031 of a corresponding guide vane preform, and connect the other end of the positioning pin 206 to one of the positioning blocks 2041 in the corresponding positioning block group 204.

[0117] In other words, during assembly, the first positioning block 2041 corresponding to each guide vane preform is first connected to the connecting ring 203. Then, the first side of the clamping section 1031 of the guide vane preform is aligned with the corresponding first positioning block 2041 to facilitate positioning of the guide vane preform. Next, the second positioning block 2041 corresponding to each guide vane preform is assembled onto the connecting ring 203, with the second positioning block 2041 aligned with the second side of the clamping section 1031 in the corresponding guide vane preform. This completes the fixation of the guide vane preform.

[0118] To prevent deformation caused by radial movement of the guide vane preform during welding, a limiting block 2051 is installed above each positioning block 2041, and the limiting block 2051 is fixed to the corresponding positioning block 2041 using positioning pins and bolts. The concave surfaces of the limiting block 2051 contact the outer sides of the clamping section of the guide vane, thus providing positioning. Finally, one end of the positioning pin 206 is inserted into the clamping section 1031 of a corresponding guide vane preform, and the other end of the positioning pin 206 is spot-welded to one of the positioning blocks 2041 in the corresponding positioning block group 204. This prevents deformation caused by axial movement of the guide vane preform along the guide shaft during welding, as achieved by the positioning pin 206.

[0119] S307: Weld the guide vane preforms to the inner plate and the guide shaft respectively.

[0120] Following a symmetrical welding method, after each guide vane preform is welded, a new guide vane preform is welded after each weld pass; welding an entire guide vane preform in one step is not permitted. The welds between the guide vane preform and the guide shaft and inner plate assembly are alternated. Gas shielded welding is used during welding, with stainless steel of no more than 1.5mm in diameter as the welding material. In this embodiment, carbon dioxide gas shielded welding is used. The welding material is GFS-316L stainless steel with a diameter of Φ1.2mm.

[0121] S308: Multiple ear-shaped outer plates are welded onto the inner plate and the intermediate flange, so that the multiple ear-shaped outer plates are evenly distributed along the circumference of the inner plate, and one end of each ear-shaped outer plate is connected to the second end of the inner plate, and the other end of the ear-shaped outer plate is connected to the end face of the intermediate flange.

[0122] In this embodiment, multiple ear-shaped outer plates 1025 are evenly distributed along the circumference of the inner plate 1021. That is, multiple ear-shaped outer plates 1025 are located on the same circumference, and any two adjacent ear-shaped outer plates 1025 have the same arc length on their respective circumferences.

[0123] Figure 13 This is a schematic diagram of an inner plate with an outer ear-shaped plate welded to it, as provided in an embodiment of this disclosure. Figure 13As shown, before welding, the outer circle of the inner plate 1021, the upper surface of the suspension connecting flange 1023, and the upper and lower surfaces of the intermediate flange 1022 are machined, and the assembly line of the ear-shaped outer plate 1025 is marked.

[0124] In this embodiment, in order to further enhance the structural strength of the conduit, the first stiffening plate 1026 and the second stiffening plate 1027 are also welded together when welding the ear-shaped outer plate 1025.

[0125] Assemble the first stiffener plate 1026 and the second stiffener plate 1027 according to the machining markings, wherein the first stiffener plate 1026 is a rectangular plate.

[0126] Multiple first stiffeners 1026 are circumferentially distributed within the first space enclosed by the outer wall surface of the inner plate 1021, the end face of the intermediate flange 1022, the inner wall surface of the outer cylinder plate 1024, and the end face of the suspension connecting flange 1023. The inner plate 1021, the intermediate flange 1022, the outer cylinder plate 1024, and the suspension connecting flange 1023 are all in contact with the side of the first stiffeners 1026, and the deviation is required to be ≤1mm.

[0127] In this embodiment, to facilitate the welding of the first stiffener, multiple windows 1001 are first machined on the inner plate 1021, and the first stiffener is welded through the windows 1001. Argon arc welding is used for welding. The welding material is stainless steel with a diameter not exceeding 3mm. In this embodiment, the welding material is GFS-316L stainless steel with a diameter of Φ2mm.

[0128] Then, multiple second stiffening plates 1027 are provided on the end face of the intermediate flange 1022. The multiple second stiffening plates 1027 correspond one-to-one with multiple first stiffening plates 1026, and the corresponding first stiffening plates and second stiffening plates are coplanar. The first stiffening plate is a semi-elliptical plate, and the straight side of the second stiffening plate 1027 is connected to the end face of the intermediate flange 1022.

[0129] Then, the ear-shaped outer plate 1025 is assembled to the outside of the second stiffener 1027, and one end of the ear-shaped outer plate 1025 is welded to the end face of the second end of the inner plate 1021, and the other end is welded to the intermediate flange 1022.

[0130] Finally, gas shielded welding was used for welding. The welding material was stainless steel with a diameter not exceeding 1.5 mm. In this embodiment, carbon dioxide gas shielded welding was used. The welding material was GFS-316L stainless steel with a diameter of Φ1.2 mm. After welding, the outer circle and bevel of the suspension connection flange were machined.

[0131] S309: Weld an outer cylinder plate onto the inner plate and the intermediate flange, so that the outer cylinder plate is coaxially fitted outside the inner plate and the intermediate flange, and the first end of the outer cylinder plate is connected to the outer peripheral wall of the intermediate flange, and the second end of the outer cylinder plate is connected to the suspension connection flange.

[0132] Figure 14 This is a schematic diagram of welding an outer cylinder plate onto an inner plate, as provided in an embodiment of this disclosure. Figure 14 As shown, before welding the outer cylinder plate 1024, the positioning assembly is removed, and the above-mentioned welded parts are annealed. Afterwards, the left end face and outer bevel of the suspension connecting flange 1023 are machined.

[0133] Then, the outer cylinder plate 1024 is divided into two semicircles for welding. Taking the outer circle of the machined suspension connection flange 1023 as a reference, the inner wall of the outer cylinder plate 1024 is fitted with one side of each first stiffener plate 1026 to ensure that the root gap is ≤2mm.

[0134] After assembly, the outer cylinder plate is welded to the suspension connecting flange and the intermediate flange using argon arc welding. The welding material is stainless steel with a diameter not exceeding 3mm. In this embodiment, the welding material is GFS-316L stainless steel with a diameter of Φ2mm.

[0135] When welding the outer cylinder plate 1024, the first stiffener plate 1026 and the outer cylinder plate 1024 need to be welded together through the window 1001.

[0136] The outer cylinder plate 1024 is also welded using argon arc welding. The welding material is stainless steel with a diameter not exceeding 3mm. In this embodiment, the welding material is GFS-316L stainless steel with a diameter of Φ2mm.

[0137] S310: The clamping section of each guide vane preform is machined so that the outer surface of the clamping section is a curved surface that meets the surface shape requirements of the guide vane.

[0138] The clamping section is machined to make it a curved surface that meets the profile requirements of the guide vane.

[0139] S311: The inner hole of the inner plate is machined so that the inner wall of the inner plate is a curved surface that meets the surface shape requirements of the inner hole of the guide tube.

[0140] This allows the inner bore of the tapered inner plate to be machined into a streamlined shape, thereby reducing water flow resistance and improving the performance of the guide tube.

[0141] The method for manufacturing a guide vane provided in this disclosure divides the guide vane into a clamping section and a non-clamping section along its diameter. The clamping section is manufactured in the form of a minimum rectangular body that can cover the guide vane, while the non-clamping section is directly machined with a curved surface. The clamping section is located in the middle of the front guide vane, and the non-clamping sections are located in the areas on both sides where welding is required. This process can simultaneously ensure the assembly and positioning accuracy of the guide vane and reduce the amount of welding on both sides of the guide vane. Moreover, when positioning the guide vane, positioning blocks and limiting blocks can simultaneously fix the four sides of the guide vane, so that the position and perpendicularity of the inner plate to the guide vane shaft are not affected. Furthermore, the inner plate is formed as a cone without a surface shape, and is formed by pressing and welding two steel plates. This allows the inner hole of the inner plate to maintain a straight tapered state, and the welding edge between the guide vane and the inner plate to be straight, reducing the difficulty of machining and welding. In addition, the straight tapered shape of the inner plate increases the machining allowance, increases the rigidity of the part, and reduces welding deformation.

[0142] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A method for manufacturing a catheter, characterized in that, The manufacturing method includes: Multiple guide vane preforms are processed. Each guide vane preform includes a clamping section (1031) and two non-clamping sections (1032). The two ends of the clamping section (1031) are respectively connected to the two non-clamping sections (1032). The clamping section (1031) has a rectangular structure. The outer surface of the non-clamping section (1032) is curved, and the surface curvature of the outer surface of the non-clamping section (1032) meets the surface curvature requirements of the guide vane. The intermediate flange (1022) is coaxially welded to the outside of the middle of the annular inner plate (1021) to form an inner plate assembly. The inner diameter of the inner hole of the inner plate (1021) gradually increases from the first end to the second end of the inner plate (1021). The suspension connecting flange (1023), the inner plate assembly, and the guide shaft (101) are coaxially positioned and assembled together, such that the suspension connecting flange (1023) is located at the first end of the inner plate (1021), and both the suspension connecting flange (1023) and the inner plate assembly are fitted outside the guide shaft (101). For each of the guide vane preforms, the guide vane preform is positioned and installed between the inner plate assembly and the guide shaft (101) by the clamping section (1031), and the two non-clamping sections (1032) are respectively attached to the inner wall of the inner plate (1021) and the outer wall of the guide shaft (101); The guide vane preform is welded to the inner plate (1021) and the guide shaft (101) respectively to obtain a welded part; The clamping sections in the welded component are machined to obtain the conduit.

2. The manufacturing method according to claim 1, characterized in that, The clamping section (1031) is the smallest circumscribed rectangle formed by machining the part of the guide vane preform where the clamping section (1031) is located.

3. The manufacturing method according to claim 1, characterized in that, The coaxial positioning and assembly of the suspension connecting flange (1023), the inner plate assembly, and the guide shaft (101) includes: The guide shaft (101) and the suspension connecting flange (1023) are coaxially positioned and assembled together by a positioning component, so that the suspension connecting flange (1023) is sleeved on the outside of the guide shaft (101); The inner plate assembly is coaxially positioned on one side of the suspension connecting flange (1023), and the end face of the first end of the inner plate (1021) is in contact with the suspension connecting flange (1023).

4. The manufacturing method according to claim 3, characterized in that, The positioning component includes a positioning plate (201), which has an annular positioning groove (2010) near its outer periphery. The positioning plate (201) has a stepped hole (2011) in the middle. The direction of the larger inner diameter end of the stepped hole (2011) is the same as the opening direction of the positioning groove (2010). The positioning groove (2010) and the stepped hole (2011) are coaxial. The method of coaxially positioning and assembling the guide shaft (101) and the suspension connecting flange (1023) together using a positioning assembly includes: The middle part of the guide shaft (101) is fitted into the stepped hole (2011); The suspension connecting flange (1023) is fitted into the positioning groove (2010).

5. The manufacturing method according to claim 4, characterized in that, The positioning assembly further includes a connecting ring (203) and a plurality of positioning block groups (204). The connecting ring (203) is connected to the positioning plate (201) and the positioning groove (2010) with the openings facing the same side. The connecting ring (203) is coaxial with the positioning groove (2010) and is located within the ring in which the positioning groove (2010) is located. The plurality of positioning block groups (204) are arranged in a one-to-one correspondence with the plurality of guide vane preforms, and each of the plurality of positioning block groups (204) includes two positioning blocks (2041). The step of positioning and installing the guide vane preform between the inner plate assembly and the guide shaft (101) via the clamping section (1031), and wherein the two non-clamping sections (1032) are respectively attached to the inner wall of the inner plate (1021) and the outer wall of the guide shaft (101), includes: The first positioning block (2041) in each of the positioning block groups (204) is evenly distributed circumferentially on the connecting ring (203) with the axis of the conduit shaft (101) as the axis, and is connected to the connecting ring (203); The plurality of guide vane preforms are evenly distributed circumferentially between the guide shaft (101) and the inner plate (1021) with the axis of the guide shaft (101) as the axis, such that the first side of each clamping section (1031) is in contact with the first positioning block (2041) in the corresponding positioning block group (204), and the two non-clamping sections (1032) of each guide vane preform are respectively in contact with the inner wall of the inner plate (1021) and the outer wall of the guide shaft (101); The second positioning block (2041) of the positioning block group (204) corresponding to the guide vane preform is fixed on the connecting ring (203), and the second positioning block (2041) of the positioning block group (204) is attached to the second side of the clamping section (1031) in the corresponding guide vane preform. The first side and the second side of the clamping section (1031) are respectively the two opposite sides of the clamping section (1031) along the circumferential direction of the guide shaft (101).

6. The manufacturing method according to claim 5, characterized in that, The positioning component further includes multiple limit block groups (205) and multiple positioning pins (206). The multiple limit block groups (205) correspond one-to-one with the multiple positioning block groups (204). Each of the multiple limit block groups (205) includes two limit blocks (2051), and each of the two limit blocks (2051) has a limit groove (2050). The method of positioning and installing the guide vane preform between the inner plate assembly and the guide shaft (101) via the clamping section (1031), and wherein the two non-clamping sections (1032) are respectively attached to the inner wall of the inner plate (1021) and the outer wall of the guide shaft (101), further includes: Two limiting blocks (2051) in the limiting block group (205) are respectively connected to two positioning blocks (2041) in a corresponding positioning block group (204), and the limiting block (2051) is located on the side of the connected positioning block (2041) away from the connecting ring (203). Along the circumference of the guide shaft (101), the first side and the second side of the clamping section of each guide vane preform are respectively located in the limiting groove (2050) of the two limiting blocks in the corresponding limiting block group. One end of the positioning pin (206) is inserted into the clamping section (1031) of a corresponding guide vane preform, and the other end of the positioning pin (206) is connected to one of the positioning blocks (2041) in the corresponding positioning block group (204). The length direction of the positioning pin (206) is the radial direction of the guide shaft (101) to which the corresponding guide vane preform is connected.

7. The manufacturing method according to any one of claims 1-6, characterized in that, The manufacturing method further includes: The two sector plates are processed to obtain two semi-cones; The two semi-cones are welded together to obtain the inner plate, and the conical hole formed inside the two semi-cones is the inner hole; The outer wall of the inner plate is processed to make the outer wall of the inner plate curved.

8. The manufacturing method according to any one of claims 1-6, characterized in that, The manufacturing method further includes: Multiple ear-shaped outer plates (1025) are welded onto the inner plate and the intermediate flange. The multiple ear-shaped outer plates (1025) are distributed circumferentially along the inner plate (1021), and one end of each ear-shaped outer plate (1025) is connected to the second end of the inner plate (1021), and the other end of each ear-shaped outer plate (1025) is connected to the end face of the intermediate flange (1022). An outer cylinder plate (1024) is welded onto the intermediate flange (1022) and the suspension connecting flange (1023), such that the outer cylinder plate (1024) is coaxially sleeved on the inner plate (1021) and the intermediate flange (1022), and the first end of the outer cylinder plate (1024) is connected to the outer peripheral wall of the intermediate flange (1022), and the second end of the outer cylinder plate (1024) is connected to the suspension connecting flange (1023).

9. The manufacturing method according to any one of claims 1-6, characterized in that, The process of machining each clamping segment in the welded component to obtain the conduit includes: The clamping sections of each of the guide vane preforms are machined so that the outer surface of the clamping section is a curved surface that meets the surface shape requirements of the guide vane.

10. The manufacturing method according to any one of claims 1-6, characterized in that, The manufacturing method further includes: The inner hole of the inner plate is machined so that the inner wall of the inner plate is a curved surface that meets the surface shape requirements of the inner hole of the conduit.

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