Machining method of special-shaped thin-wall guide cylinder

Abstract

The invention discloses a machining method of a special-shaped thin-wall guide cylinder, and belongs to the technical field of machining. The special-shaped thin-wall flow guide cylinder comprises a circular cylinder body and an arc-shaped plate, the arc-shaped plate is provided with a through hole, the peripheral face of the first end of the circular cylinder body is in sealed connection with the side wall of the through hole, a sunken first sealing groove is formed in the plate face of the arc-shaped plate on the outer side of an orifice of the through hole, the arc-shaped plate is provided with a connection plane, and a flange is arranged on the peripheral face of the second end of the cylinder body. A second sealing groove is formed in the plate face of the side, close to the arc-shaped plate, of the flange. The processing method comprises the following steps: 3D printing a rough blank of the special-shaped thin-wall guide cylinder; detecting the rough blank of the special-shaped thin-wall guide cylinder and determining the machining allowance; hoisting the rough blank of the special-shaped thin-wall guide cylinder and the printing substrate to a processing machine tool, and determining a processing reference surface; cutting off the rough blank of the special-shaped thin-wall guide cylinder from the printing substrate; and machining the special-shaped thin-wall guide cylinder rough blank. The machining method of the special-shaped thin-wall guide cylinder is simple in procedure, high in efficiency and low in rejection rate.

Description

Technical Field

[0001] This application belongs to the field of machining technology, and in particular relates to a machining method for an irregularly shaped thin-walled guide tube. Background Technology

[0002] A flow guide tube typically consists of an arc-shaped surface and a circular cylindrical structure. The arc-shaped surface has several mounting holes, while the circular cylindrical structure features sealing grooves, threads, and other structural elements. The conventional manufacturing process for a flow guide tube involves machining and integral welding; that is, it consists of an arc plate and a cylindrical body, which are machined separately and then welded together to form a single unit.

[0003] The manufacturing process for this type of irregularly shaped, thin-walled structural part is complex, requiring machining both before and after welding. Specific tooling is needed, and repeated clamping and adjustment are required, resulting in low machining efficiency. Furthermore, the thin-walled sections require high precision, leading to a high scrap rate and overall machining difficulty. Material utilization is also low. On the other hand, to ensure machining quality, multiple 3D scans of the workpiece are necessary to determine machining allowances and datum points. This requires specialized inspection equipment, resulting in high inspection costs and impacting machining efficiency. Summary of the Invention

[0004] This application provides a method for processing irregularly shaped thin-walled guide tubes, aiming to at least partially solve the technical problems of complex processing steps, low efficiency, and high scrap rate in the processing of irregularly shaped thin-walled guide tubes. Therefore,

[0005] In one aspect of this application, a method for processing an irregularly shaped thin-walled guide tube is provided. The irregularly shaped thin-walled guide tube includes a circular cylinder and an arc-shaped plate. The arc-shaped plate has a through hole. The outer peripheral surface of the first end of the circular cylinder is sealed to the side wall of the through hole. A recessed first sealing groove is provided on the outer side of the opening of the through hole. The junction between the side surface of the arc-shaped plate near the circular cylinder and the outer peripheral surface of the circular cylinder is set as a connecting plane. A flange is provided on the outer peripheral surface of the second end of the circular cylinder. A second sealing groove is opened on the side surface of the flange near the arc-shaped plate. A screw hole is opened on the arc-shaped plate.

[0006] The processing method includes:

[0007] 3D printing of the irregularly shaped thin-walled guide tube blank;

[0008] The specifications and parameters of the irregular thin-walled guide tube blank are detected and the machining allowance is determined;

[0009] The irregularly shaped thin-walled guide tube blank and the printing substrate are hoisted onto the processing machine tool and the processing reference surface is determined.

[0010] The irregularly shaped thin-walled guide tube blank is cut off from the printing substrate;

[0011] The rough blank of the irregular thin-walled guide tube is machined.

[0012] In some embodiments, detecting the specifications of the irregularly shaped thin-walled guide tube blank and determining the machining allowance includes:

[0013] The thickness of the arc surface and the outer contour dimensions of the arc plate are detected;

[0014] The wall thickness at the end face of the cylindrical body and the external dimensions of the cylindrical body are measured.

[0015] The thickness of the arc surface, the outer contour dimension of the arc plate, the wall thickness of the cylinder end face, and the outer dimensions of the circular cylinder are compared with the corresponding theoretical design values ​​to obtain the machining allowance.

[0016] In some embodiments, the step of hoisting the irregularly shaped thin-walled guide tube blank and the printing substrate together onto the machine tool and determining the machining reference surface includes:

[0017] The irregular thin-walled guide tube blank and the printing substrate are hoisted together onto the processing machine tool, and the printing reference on the printing substrate is aligned with the alignment reference of the processing machine tool.

[0018] Using the connecting plane as the alignment reference, the shaft end face of the second end of the cylindrical body is machined into a machining reference surface.

[0019] In some embodiments, the flatness of the alignment plane is within 0.1 mm.

[0020] In some embodiments, cutting the irregularly shaped thin-walled guide tube blank from the printing substrate includes:

[0021] Align the printed substrate and clamp it on the processing machine tool, ensuring that the flatness of the alignment is within 0.2mm;

[0022] Using the substrate plane of the printing substrate as the zero point, the irregular thin-walled guide tube blank is cut off from the printing substrate;

[0023] Cut off the excess support along the arc surface of the arc plate, ensuring that a margin of no more than 1mm is left on the arc surface.

[0024] In some embodiments, machining the irregularly shaped thin-walled guide tube blank includes:

[0025] The arc-shaped plate, the second end of the cylindrical body, and the flange are milled.

[0026] The outer circumferential surface of the cylindrical body is machined by turning, and the 3D-printed support structure is removed;

[0027] The screw holes on the arc-shaped plate are machined to remove burrs.

[0028] In some embodiments, the milling of the arc-shaped plate, the flange, and the sealing groove includes:

[0029] The end face of the second end of the cylindrical body is used as the machining reference for clamping and alignment;

[0030] Milling the arc surface of the arc plate and the first sealing groove thereon;

[0031] The arc-shaped plate is clamped by a contouring fixture adapted to the arc-shaped surface of the arc-shaped plate;

[0032] The end face of the second end of the cylindrical body, the flange, and the second sealing groove are milled.

[0033] In some embodiments, the turning of the outer peripheral surface of the cylindrical body includes:

[0034] Using the first sealing groove as a positioning reference, the arc-shaped plate and the circular cylinder are clamped by the first clamping fixture;

[0035] The outer circumferential surface of the circular cylinder is machined.

[0036] In some embodiments, the first clamping fixture includes:

[0037] The support block is adapted to abut against the bottom surface and side wall surface of the first sealing groove;

[0038] An inner support cylinder is embedded in the cylindrical body to support the cylindrical body and maintain its shape;

[0039] A tensioning disc is connected to the inner support cylinder, and the tensioning disc abuts against the flange surface to cooperate with the support block to clamp the arc-shaped plate and the cylindrical body.

[0040] In some embodiments, the turning of the outer peripheral surface of the cylindrical body includes:

[0041] Using the convex arc surface of the arc plate as a positioning reference, the arc plate is fixed by a second clamping fixture and fastening bolts;

[0042] The outer circumferential surface of the cylindrical body is machined by turning.

[0043] The second clamping fixture includes a pallet, on one side of which a limiting groove is formed. The bottom and sidewall of the limiting groove are adapted to and abut against the convex arc surface and side surface of the arc-shaped plate.

[0044] The embodiments of this application have at least the following beneficial effects:

[0045] The processing method of the irregular thin-walled guide tube provided in this application embodiment relates to an irregular thin-walled guide tube, including a circular cylinder and an arc-shaped plate. The arc-shaped plate has a through hole. The outer peripheral surface of the first end of the circular cylinder is sealed and connected to the side wall of the through hole. The arc-shaped plate has a through hole, and a recessed first sealing groove is provided on the outer side of the through hole. The junction of the side surface of the arc-shaped plate near the second end of the circular cylinder and the outer peripheral surface of the circular cylinder is set as a connecting plane. A flange is provided on the outer peripheral surface of the second end of the circular cylinder. A second sealing groove is opened on the side surface of the flange near the arc-shaped plate. A screw hole is opened on the arc-shaped plate. The processing method includes 3D printing the irregular thin-walled guide tube blank; inspecting the irregular thin-walled guide tube blank and determining the machining allowance; hoisting the irregular thin-walled guide tube blank and the printing substrate together onto a processing machine tool and determining the machining reference surface; cutting the irregular thin-walled guide tube blank from the printing substrate; and machining the irregular thin-walled guide tube blank. It is worth noting that processing irregularly shaped thin-walled guide tube blanks using 3D printing can greatly improve the efficiency and quality of rough forming of workpieces and reduce the scrap rate. Furthermore, hoisting the blank and the printing substrate together onto the machining tool for positioning and machining the reference surface can greatly simplify the clamping and alignment operations of irregularly shaped parts and ensure the machining accuracy of the reference surface, thereby ensuring the reliability of the machining foundation. This helps to improve the overall machining accuracy of the workpiece, reduce the scrap rate, and relatively reduce the amount of subsequent correction operations, thus helping to improve processing efficiency. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 A schematic diagram of the 3D printed blank of the irregular thin-walled guide tube in an embodiment of this application is shown;

[0048] Figure 2 It shows Figure 1 A schematic diagram of the connecting plane of the irregularly shaped thin-walled guide tube and the machining reference surface of the second end of the tube;

[0049] Figure 3 It shows Figure 1 A schematic diagram of the arc-shaped plate and the first sealing groove of the irregular thin-walled guide tube;

[0050] Figure 4 It shows Figure 1 A schematic diagram of the assembly of the arc plate and the contouring tooling of the irregular thin-walled guide tube;

[0051] Figure 5 It shows Figure 4 Top view;

[0052] Figure 6 A schematic diagram of the structure of the first clamping fixture provided in an embodiment of this application is shown;

[0053] Figure 7 It shows Figure 6 A structural schematic diagram of the first clamping fixture from another angle;

[0054] Figure 8 It shows Figure 6 A schematic diagram of the assembly state of the first clamping fixture and the irregular thin-walled guide tube;

[0055] Figure 9 It shows Figure 8 Another side view of the assembly state of the first clamping fixture and the irregular thin-walled guide tube;

[0056] Figure 10 A schematic diagram of the structure of the second clamping fixture provided in an embodiment of this application is shown;

[0057] Figure 11 It shows Figure 10 A structural diagram of the second clamping fixture from another angle;

[0058] Figure 12 It shows Figure 10 A schematic diagram of the assembly state of the first clamping fixture and the irregular thin-walled guide tube;

[0059] Figure 13 It shows Figure 12 Another side view of the assembly state of the first clamping fixture and the irregular thin-walled guide tube;

[0060] Figure 14 It shows Figure 1 A cross-sectional view of the irregularly shaped thin-walled guide tube.

[0061] Figure label:

[0062] 1- Circular cylinder, 11- First end, 12- Second end, 13- Flange, 14- First sealing groove;

[0063] 2-Arc-shaped plate, 21-Through hole, 22-First sealing groove, 221-Groove bottom surface, 222-Side wall surface, 23-Connecting plane, 24-Screw hole;

[0064] 3-Printed substrate;

[0065] 4- Contouring tooling;

[0066] 5-First clamping fixture, 51-Support frame, 52-Inner support cylinder, 53-Tightening disc;

[0067] 6-Second clamping fixture, 61-Plate, 611-Limiting groove. Detailed Implementation

[0068] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0069] Furthermore, reference numerals and / or reference letters may be repeated in different examples in this application. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0070] This application is described below with reference to the accompanying drawings and specific embodiments:

[0071] The irregularly shaped thin-walled guide tube has a complex structure and is difficult to clamp. Its thickness is also relatively low, making it prone to deformation and breakage. This results in difficult processing, low efficiency, and a high scrap rate.

[0072] Therefore, this application provides a processing method for irregularly shaped thin-walled guide tubes, which aims to achieve convenient alignment of product benchmarks and improve processing efficiency by formulating reasonable process schemes and adopting special tooling; it can at least solve the technical problems of complex processing procedures, low efficiency and high scrap rate of irregularly shaped thin-walled guide tubes to a certain extent.

[0073] See Figure 1 , Figure 2 and Figure 14 In some embodiments, the irregular thin-walled guide tube includes a circular cylinder 1 and an arc-shaped plate 2. The arc-shaped plate 2 has a through hole 21. The outer peripheral surface of the first end 11 of the circular cylinder 1 is sealed to the side wall of the through hole 21. A recessed first sealing groove 22 is provided on the outer side of the opening of the through hole 21. The junction between the side surface of the arc-shaped plate 2 near the circular cylinder 1 and the outer peripheral surface of the circular cylinder 1 is set as a connecting plane 23. A flange 13 is provided on the outer peripheral surface of the second end 12 of the circular cylinder 1. A second sealing groove 14 is opened on the side plate surface of the flange 13 near the arc-shaped plate 2. A screw hole 24 is opened on the arc-shaped plate 2.

[0074] The processing method includes:

[0075] 3D printing of the irregularly shaped thin-walled guide tube blank;

[0076] The specifications and parameters of the irregular thin-walled guide tube blank are detected and the machining allowance is determined;

[0077] The irregular thin-walled guide tube blank and the printing substrate 3 are hoisted together onto the processing machine tool and the processing reference surface is determined;

[0078] The irregularly shaped thin-walled guide tube blank is cut off from the printing substrate 3;

[0079] The rough blank of the irregular thin-walled guide tube is machined.

[0080] In some embodiments, detecting the specifications of the irregularly shaped thin-walled guide tube blank and determining the machining allowance includes:

[0081] The thickness of the arc-shaped plate 2 and the outer contour dimensions of the arc-shaped plate 2 are detected;

[0082] The wall thickness of the flange 13 and the external dimensions of the cylindrical body 1 are measured.

[0083] The thickness of the plate, the outer contour dimensions of the arc plate, the wall thickness of the flange 13, and the outer dimensions of the cylindrical body 1 are compared with their corresponding theoretical design values ​​to obtain machining allowances.

[0084] The processing method of the irregular thin-walled guide tube provided in this application embodiment relates to an irregular thin-walled guide tube, including a circular cylinder and an arc-shaped plate. The arc-shaped plate has a through hole. The outer peripheral surface of the first end of the circular cylinder is sealed and connected to the side wall of the through hole. The arc-shaped plate has a through hole, and a recessed first sealing groove is provided on the outer side of the through hole. The junction of the side surface of the arc-shaped plate near the second end of the circular cylinder and the outer peripheral surface of the circular cylinder is set as a connecting plane. A flange is provided on the outer peripheral surface of the second end of the circular cylinder. A second sealing groove is opened on the side surface of the flange near the arc-shaped plate. A screw hole is opened on the arc-shaped plate. The processing method includes 3D printing the irregular thin-walled guide tube blank; inspecting the irregular thin-walled guide tube blank and determining the machining allowance; hoisting the irregular thin-walled guide tube blank and the printing substrate together onto a processing machine tool and determining the machining reference surface; cutting the irregular thin-walled guide tube blank from the printing substrate; and machining the irregular thin-walled guide tube blank. It is worth noting that processing irregularly shaped thin-walled guide tube blanks using 3D printing can greatly improve the efficiency and quality of rough forming of workpieces and reduce the scrap rate. Furthermore, hoisting the blank and the printing substrate together onto the machining tool for positioning and machining the reference surface can greatly simplify the clamping and alignment operations of irregularly shaped parts and ensure the machining accuracy of the reference surface, thereby ensuring the reliability of the machining foundation. This helps to improve the overall machining accuracy of the workpiece, reduce the scrap rate, and relatively reduce the amount of subsequent correction operations, thus helping to improve processing efficiency.

[0085] See Figure 2 In some embodiments, the step of hoisting the irregularly shaped thin-walled guide tube blank and the printing substrate 3 together onto the machine tool and determining the machining reference surface includes:

[0086] The irregular thin-walled guide tube blank and the printing substrate 3 are hoisted together onto the processing machine tool, and the printing reference on the printing substrate 3 is unified with the alignment reference of the processing machine tool, thereby improving the clamping and alignment efficiency and quality.

[0087] Using the connecting plane 23 as the alignment reference, the shaft end face of the second end 12 of the circular cylinder 1 is machined into a machining reference surface.

[0088] It is worth noting that positioning via the printed substrate 3 can greatly improve positioning accuracy and significantly simplify the alignment and positioning operation. If the product is cut and separated from the printed substrate 3 at this time, it would be necessary to subsequently manufacture special tooling or perform 3D scanning and comparative analysis of the processing reference surface, which would be time-consuming and labor-intensive.

[0089] Generally, when the shaft end face of the second end 12 of the circular cylinder 1 is machined into a machining reference surface, a margin of 1.5mm can be left to increase the fault tolerance.

[0090] In some embodiments, the alignment flatness of the connecting plane 23 is within 0.1 mm, and the alignment accuracy can be controlled.

[0091] In some embodiments, cutting the irregularly shaped thin-walled guide tube blank from the printing substrate includes:

[0092] Align the printed substrate 3 and clamp it on the processing machine tool, with the alignment flatness within 0.2mm;

[0093] Using the substrate plane of the printing substrate 3 as the zero point, the irregular thin-walled guide tube blank is cut off from the printing substrate 3;

[0094] Cut off the excess support along the arc surface of the arc plate 2, ensuring that a margin of no more than 1mm is left on the arc surface.

[0095] Generally, during the cutting operation, the substrate plane of the printing substrate 3 is taken as the zero point, and a margin of no more than 0.5mm is left on the printing substrate 3 to form a certain fault tolerance and absorb and correct local deformation during the printing process.

[0096] Wire EDM cuts away excess support along the arc surface, ensuring that no more than 1mm of allowance remains on the arc surface. This avoids tool breakage and increased tool costs due to intermittent cutting during subsequent milling, and reduces the processing time of subsequent five-axis equipment, thereby improving processing efficiency.

[0097] See Figures 3 to 13 In some embodiments, machining the irregularly shaped thin-walled guide tube blank includes:

[0098] The arc-shaped plate 2, the second end 12 of the circular cylinder 1 and the flange 13 are milled.

[0099] The outer circumferential surface of the cylindrical body 1 is machined by turning, and the 3D printed support structure is removed;

[0100] The screw holes 24 on the arc-shaped plate 2 are machined to remove burrs.

[0101] See Figure 3 , Figure 4 and Figure 5 In some embodiments, the milling of the arc-shaped plate, the flange, and the sealing groove includes:

[0102] The end face of the second end 12 of the cylindrical body 1 is used as the machining reference for clamping and alignment;

[0103] Milling the arc surface of the arc plate 2 and the first sealing groove 22 thereon;

[0104] The arc plate 2 is clamped by a contouring fixture 4 adapted to the arc surface of the arc plate 2;

[0105] The end face of the second end 12 of the cylindrical body 1, the flange 13, and the second sealing groove 14 are milled.

[0106] The arc surface of the arc plate 2 and the first sealing groove 22, etc., can be milled by a five-axis machining center.

[0107] The contouring fixture 4 can be configured as a support platform with an arc-shaped concave surface for fixing the arc-shaped plate 2, and can also be tightened and fixed by fasteners.

[0108] Generally, five-axis milling can be used to machine external diameters, threads, and 3D-printed pre-installed supports. However, five-axis milling has low efficiency, especially when milling external threads, requiring multiple adjustments to tool compensation to achieve the desired result. Removing 3D-printed supports also necessitates continuous adjustments to the machining program based on the remaining material. Furthermore, chip breaking during milling causes significant wear and tear on the cutting tools and CNC machine tools, and it occupies a large amount of time on the crucial five-axis equipment, resulting in high costs. Turning threads, on the other hand, can increase machining efficiency by 8-10 times compared to milling.

[0109] See Figure 6 , Figure 7 , Figure 8 and Figure 9 In some embodiments, the turning of the outer peripheral surface of the cylindrical body includes:

[0110] Using the first sealing groove 22 as a positioning reference, the arc plate 2 and the circular cylinder 1 are clamped by the first clamping fixture 5;

[0111] The outer circumferential surface of the circular cylinder 1 is machined.

[0112] In other words, the first clamping fixture 5 is configured to clamp and fix the arc-shaped plate 2 and the circular cylinder 1. Furthermore, the first clamping fixture 5 can achieve precise positioning using the first sealing groove 22.

[0113] In some embodiments, the first clamping fixture 5 includes:

[0114] The support block 51 is adapted to abut against the bottom surface 221 and the side wall surface 222 of the first sealing groove 22;

[0115] An inner support cylinder 52 is embedded inside the circular cylinder 1 to support the circular cylinder 1 and maintain its shape;

[0116] A tensioning disc 53 is connected to the inner support cylinder 52, and the tensioning disc 53 abuts against the disc surface of the flange 13 to cooperate with the support block 51 to clamp the arc plate 2 and the circular cylinder 1.

[0117] It is worth noting that using the pre-machined first sealing groove 22 as the positioning reference for the turning tooling ensures the machining accuracy of the subsequent structure. Supporting the circular cylinder 1 with the inner support cylinder 52 increases the rigidity of the part during machining to a certain extent, limiting the deformation range of thin-walled parts. Simultaneously, the tensioning disc 53 serves as a clamping component and can cooperate with the lathe center to facilitate turning.

[0118] In other words, the first clamping fixture 5 is used to clamp and align the lathe in a one-clamp-one-push manner, that is, the lathe chuck clamps the cylindrical surface and the lathe center pushes against the tensioning disc 53 to increase rigidity and prevent deformation during turning.

[0119] See Figure 10 , Figure 11 , Figure 12 and Figure 13 In some embodiments, the turning of the outer circumferential surface of the cylindrical body includes:

[0120] Using the convex arc surface of the arc plate 2 as a positioning reference, the arc plate 2 is fixed by the second clamping fixture 6 and fastening bolts;

[0121] The outer circumferential surface of the cylindrical body 1 is machined by turning.

[0122] The second clamping fixture 6 includes a pallet 61. A limiting groove 611 is formed on one side of the pallet 61. The bottom and side wall of the limiting groove 611 are adapted to and abut against the convex arc surface and side surface of the arc plate 2, thereby achieving reliable positioning and fixing.

[0123] Using the arc surface and surrounding shape of the pre-machined arc plate 2 as the positioning reference of the second clamping fixture 6, the through holes on the arc surface are used as mounting holes for screws and clamped to install the arc plate 2 on the second clamping fixture 6; wherein the lathe chuck clamps the cylindrical surface, the outer circle of the cylindrical surface and the threaded hole are machined, and the 3D printed reserved support on the cylindrical surface is removed by machining.

[0124] After processing is completed, quality inspection is required, mainly based on theoretical design parameters, to comprehensively check dimensions and geometric tolerances.

[0125] The embodiments of this application have at least the following beneficial effects:

[0126] The processing method for irregular thin-walled guide tubes provided in this application can improve processing quality and efficiency; the processing reference is determined by using the printing reference of the printing substrate to ensure reference uniformity, replace the three-coordinate scanning comparison, and improve efficiency; the external thread and 3D printing reserved support are optimized to turning processing, the process flow is optimized, and special turning tooling is made to achieve positioning, clamping, and strengthening rigidity, thereby improving processing efficiency and quality.

[0127] In this application, unless otherwise expressly 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 being 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 being 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.

[0128] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, 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 this application.

[0129] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0130] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0131] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0132] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0133] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0134] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for processing an irregularly shaped thin-walled guide tube, characterized in that, The irregular thin-walled guide tube includes a circular cylinder and an arc-shaped plate. The arc-shaped plate has a through hole. The outer circumferential surface of the first end of the circular cylinder is sealed to the side wall of the through hole. The arc-shaped plate has a through hole. A recessed first sealing groove is provided on the outer side of the opening of the through hole. The junction between the side surface of the arc-shaped plate near the second end of the circular cylinder and the outer circumferential surface of the circular cylinder is set as a connecting plane. A flange is provided on the outer circumferential surface of the second end of the circular cylinder. A second sealing groove is opened on the side surface of the flange near the arc-shaped plate. A screw hole is opened on the arc-shaped plate. The processing method includes: 3D printing of the irregularly shaped thin-walled guide tube blank; The specifications and parameters of the irregular thin-walled guide tube blank are detected and the machining allowance is determined; The irregularly shaped thin-walled guide tube blank and the printing substrate are hoisted onto the processing machine tool and the processing reference surface is determined. The irregularly shaped thin-walled guide tube blank is cut off from the printing substrate; The rough blank of the irregular thin-walled guide tube is machined.

2. The processing method of the irregularly shaped thin-walled guide tube as described in claim 1, characterized in that, The process of detecting the specifications and parameters of the irregularly shaped thin-walled guide tube blank and determining the machining allowance includes: The thickness of the curved plate and the outer contour dimensions of the curved plate are detected. The wall thickness of the flange and the external dimensions of the cylindrical body are measured. The thickness of the plate, the outer contour dimensions of the arc plate, the wall thickness of the flange, and the outer dimensions of the cylindrical body are compared with their corresponding theoretical design values ​​to obtain machining allowances.

3. The processing method of the irregularly shaped thin-walled guide tube as described in claim 1, characterized in that, The step of hoisting the irregularly shaped thin-walled guide tube blank and the printing substrate together onto the machining tool and determining the machining reference surface includes: The irregular thin-walled guide tube blank and the printing substrate are hoisted together onto the processing machine tool, and the printing reference on the printing substrate is aligned with the alignment reference of the processing machine tool. Using the connecting plane as the alignment reference, the shaft end face of the second end of the cylindrical body is machined into a machining reference surface.

4. The processing method of the irregularly shaped thin-walled guide tube as described in claim 3, characterized in that, The flatness of the connecting plane is within 0.1mm.

5. The processing method of the irregularly shaped thin-walled guide tube as described in claim 1, characterized in that, The step of cutting the irregularly shaped thin-walled guide tube blank from the printing substrate includes: Align the printed substrate and clamp it on the processing machine tool, ensuring that the flatness of the alignment is within 0.2mm; Using the substrate plane of the printing substrate as the zero point, the irregular thin-walled guide tube blank is cut off from the printing substrate; Cut off the excess support along the arc surface of the arc plate, ensuring that a margin of no more than 1mm is left on the arc surface.

6. The processing method of the irregularly shaped thin-walled guide tube as described in claim 1, characterized in that, The machining of the irregularly shaped thin-walled guide tube blank includes: The arc-shaped plate, the second end of the cylindrical body, and the flange are milled. The outer circumferential surface of the cylindrical body is machined by turning, and the 3D-printed support structure is removed; The screw holes on the arc-shaped plate are machined to remove burrs.

7. The processing method of the irregularly shaped thin-walled guide tube as described in claim 6, characterized in that, The milling process of the arc plate, the flange, and the sealing groove includes: The end face of the second end of the cylindrical body is used as the machining reference for clamping and alignment; Milling the arc surface of the arc plate and the first sealing groove thereon; The arc-shaped plate is clamped by a contouring fixture adapted to the arc-shaped surface of the arc-shaped plate; The end face of the second end of the cylindrical body, the flange, and the second sealing groove are milled.

8. The processing method of the irregularly shaped thin-walled guide tube as described in claim 6, characterized in that, The turning process of the outer circumferential surface of the cylindrical body includes: Using the first sealing groove as a positioning reference, the arc-shaped plate and the circular cylinder are clamped by the first clamping fixture; The outer circumferential surface of the circular cylinder is machined.

9. The processing method of the irregularly shaped thin-walled guide tube as described in claim 8, characterized in that, The first clamping fixture includes: The support block is adapted to abut against the bottom surface and side wall surface of the first sealing groove; An inner support cylinder is embedded in the cylindrical body to support the cylindrical body and maintain its shape; A tensioning disc is connected to the inner support cylinder, and the tensioning disc abuts against the flange surface to cooperate with the support block to clamp the arc-shaped plate and the cylindrical body.

10. The processing method of the irregularly shaped thin-walled guide tube as described in claim 6, characterized in that, The turning process of the outer circumferential surface of the cylindrical body includes: Using the convex arc surface of the arc plate as a positioning reference, the arc plate is fixed by a second clamping fixture and fastening bolts; The outer circumferential surface of the cylindrical body is machined by turning. The second clamping fixture includes a pallet, on one side of which a limiting groove is formed. The bottom and sidewall of the limiting groove are adapted to and abut against the convex arc surface and side surface of the arc-shaped plate.

Images