Special-shaped shaft processing method

Abstract

The present invention provides a method for machining a special-shaped shaft. The method comprises: prefabricating a blank; performing rough boring on the blank, including supporting the blank in a supporting position using a support fixture, boring out a first preliminary installation end face at an end of a disk away from the shaft body, boring out a second preliminary installation end face at an end of the shaft away from the disk body, installing a first clamping fixture to the first preliminary installation end face, machining a first center hole on the first clamping fixture, and machining a second center hole on the second preliminary installation end face, with the axis of the first center hole coinciding with the axis of the second center hole, and mounting the blank on a lathe station using the first clamping fixture; rough turning the blank after rough boring to form a special-shaped shaft processing body; performing surfacing welding on the special-shaped shaft processing body; performing semi-finishing machining on the surfacing-welded special-shaped shaft processing body; and performing finish machining on the semi-finishing machining of the special-shaped shaft processing body to form the special-shaped shaft. In this way, machining accuracy is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical processing, and in particular to a method for processing a special-shaped shaft. Background Art

[0002] Wind tunnels are important testing platforms in aerospace, infrastructure, transportation and other fields. They verify the aerodynamic, structural, material and other properties of products by simulating wind that exists or does not exist in reality.

[0003] In wind tunnel testing, axial-flow compressor units are often used as the main compressor in large, continuous transonic wind tunnels. The special-shaped shaft, a key component of the axial-flow compressor rotor, consists of a shaft body and a disc connected to it. The disc diameter exceeds 2300mm, while the shaft diameter is less than 500mm. The total shaft length of the disc and shaft can reach 2080mm. This is significantly different from the typical stepped shaft of a compressor. Furthermore, given the large size of the special-shaped shaft, its design and machining precision requirements are also very high, which cannot be met by existing machining methods. Summary of the Invention

[0004] In order to at least partially solve the problems existing in the prior art, according to one aspect of the present invention, a method for processing a special-shaped shaft is provided. The method for processing a special-shaped shaft comprises:

[0005] A prefabricated blank body, the blank body comprising a shaft body and a disc body welded to one end of the shaft body;

[0006] Performing rough boring preparation on the blank body, including supporting the blank body in a supporting position by a supporting fixture, boring a first preliminary installation end surface at an end of the disk body away from the shaft body, boring a second preliminary installation end surface at an end of the shaft body away from the disk body, installing a first clamping fixture to the first preliminary installation end surface, machining a first center hole on the first clamping fixture, machining a second center hole on the second preliminary installation end surface, the axis of the first center hole coincides with the axis of the second center hole, and mounting the blank body to a lathe station by the first clamping fixture;

[0007] The blank body prepared by rough boring is rough turned to form a special-shaped shaft processing body;

[0008] Perform surfacing welding on the special-shaped shaft processed after rough turning;

[0009] Perform semi-finishing on the special-shaped shaft after surfacing welding;

[0010] The semi-finished special-shaped shaft workpiece is finished to form the special-shaped shaft.

[0011] In the method for machining a special-shaped shaft provided in this application, rough boring of the blank is performed using a first mounting fixture, which allows the blank and the special-shaped shaft formed from the blank to be mounted and fixed to equipment such as a lathe for turning, thereby ensuring machining accuracy. During the step of preparing the blank for rough boring, the first mounting fixture is installed, and the blank is always supported on the supporting fixture, reducing movement of the blank and simplifying the machining process. The supporting fixture allows for horizontal mounting and fixing of the blank and the special-shaped shaft formed from the blank, thereby enabling the machining of the first and second center holes.

[0012] Exemplarily, the step of installing the first clamping tool to the first initial installation end face includes:

[0013] Boring a first installation groove on the first initial installation end surface;

[0014] Install the first clamping tool into the first installation slot.

[0015] Exemplarily, a surfacing area is formed on a side of the shaft body away from the second initial installation end face, and the steps of surfacing the special-shaped shaft processing body include:

[0016] lathing the surfacing area to form a base for surfacing in the surfacing area;

[0017] Perform overlay welding on the overlay area.

[0018] Illustratively, before the step of semi-finishing the special-shaped shaft processed body after surfacing welding, the step includes: relieving stress of the special-shaped shaft processed body after surfacing welding.

[0019] Exemplarily, the step of semi-finishing the special-shaped shaft processed body after surfacing welding includes:

[0020] Prepare semi-finish boring for the special-shaped shaft after surfacing welding;

[0021] Perform semi-finish turning on the special-shaped shaft after semi-finish boring.

[0022] Exemplarily, the step of semi-finish boring the special-shaped shaft processed body after surfacing welding includes:

[0023] Support the special-shaped shaft processing body at the support position through the support fixture;

[0024] Performing semi-finish boring on the first preliminary installation end surface to form a first fine installation end surface, and performing semi-finish boring on the second preliminary installation end surface to form a second fine installation end surface;

[0025] Boring a second mounting groove on the first fine mounting end surface;

[0026] Install the second clamping fixture to the second installation slot;

[0027] A third center hole is machined on the second fixture, and a fourth center hole is machined on the second fine installation end face. The axes of the third center hole and the fourth center hole coincide with the axis of the special-shaped shaft processing body.

[0028] Exemplarily, the step of performing finish machining on the semi-finished special-shaped shaft processing body includes: performing finish machining on the semi-finished special-shaped shaft processing body to form the special-shaped shaft.

[0029] Exemplarily, a sandblasting area is formed at the radial outer edge of the disc body, and after the step of finish turning the semi-finished special-shaped shaft processing body to form the special-shaped shaft, the method includes:

[0030] Perform sandblasting on the sandblasting area corresponding to the special-shaped shaft.

[0031] Exemplarily, the step of sandblasting the sandblasting area corresponding to the special-shaped shaft includes:

[0032] Support the special-shaped shaft at the support position through the supporting fixture;

[0033] Install sandblasting protection tooling on the side of the disc body away from the shaft body;

[0034] Sandblast the blasting area.

[0035] Exemplarily, after the step of sandblasting the sandblasting area corresponding to the special-shaped shaft, the following steps are included:

[0036] Boring the special-shaped shaft after sandblasting;

[0037] The special-shaped shaft after boring is clamped and repaired.

[0038] The Summary of the Invention introduces a series of simplified concepts that will be further described in detail in the Detailed Description of the Invention. This Summary of the Invention is not intended to limit the key features and essential features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0039] The advantages and features of the present invention are described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The following drawings of the present invention are hereby incorporated into the present invention for understanding the present invention. The drawings show embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0041] Figure 1 is a flow chart of a method for processing a special-shaped shaft according to an exemplary embodiment of the present invention;

[0042] Figure 2is a cross-sectional view of a blank according to an exemplary embodiment of the present invention;

[0043] Figure 3 is a cross-sectional view of a first clamping tool according to an exemplary embodiment of the present invention;

[0044] Figure 4 is a cross-sectional view of a special-shaped shaft processing body according to an exemplary embodiment of the present invention;

[0045] Figure 5-6 A schematic structural diagram of a blank and a supporting tool according to an exemplary embodiment of the present invention;

[0046] Figure 7 It is a schematic structural diagram of a special-shaped shaft and a sandblasting protective tooling according to an exemplary embodiment of the present invention.

[0047] The above drawings include the following reference numerals:

[0048] 10', blank body; 10, special-shaped shaft processing body; 100, special-shaped shaft; 110, shaft body; 1101, surfacing area; 120, disk body; 1201, sandblasting area; 1202, first mounting groove; 1210, first support disk; 1220, second support disk; 1230, shaft disk flange; 1240, shaft head rib plate; 20, supporting tooling; 210, supporting frame; 220, fixing part; 30, first clamping tooling; 310, columnar structure; 320, disk structure; 40, sandblasting protection tooling. DETAILED DESCRIPTION

[0049] In the following description, a large amount of detail is provided to facilitate a thorough understanding of the present invention. However, it will be appreciated by those skilled in the art that the following description merely illustrates preferred embodiments of the present invention, and that the present invention may be practiced without one or more of these details. Furthermore, to avoid confusion with the present invention, some technical features well known in the art have not been described in detail.

[0050] To provide a thorough understanding of the embodiments of the present invention, a detailed description of the structure will be provided in the following description. It should be understood that the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of the present invention are described below in detail, but in addition to these detailed descriptions, the present invention may also have other embodiments.

[0051] The embodiment of the present invention provides a method for processing a special-shaped shaft. The special-shaped shaft produced by the method is suitable for an axial flow wind tunnel compressor. Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 The special-shaped shaft processing method includes the following steps.

[0052] Step S100: prefabricate a blank body 10'.

[0053] The blank 10' can be a welded body formed by welding a plurality of parts. Figure 2 , the blank body 10' may include a shaft body 110 and a disk body 120 welded to one end of the shaft body 110. The disk body 120 may include a first support disk 1210, a second support disk 1220, a shaft disk flange 1230 and a shaft head rib 1240. Exemplarily, step S100 may include: step S110, welding the shaft body 110, the first support disk 1210, the second support disk 1220, the shaft disk flange 1230 and the shaft head rib 1240 to form a welded part. Exemplarily, step S120 may be performed after step S110, including: relieving stress on the welded part. Step S120 may eliminate the welding stress generated by welding the welded part. Exemplarily, step S130 may be performed after step S120, including: heat treating the welded part after stress relief. Heat treatment may include operations such as quenching and tempering, which will not be elaborated here. Exemplarily, after step S130, step S140 may be performed, including: performing a performance test on the welded part after heat treatment. In this step, the hardness and mechanical properties of the welded part after heat treatment may be tested. Exemplarily, after step S140, step S150 may be performed, including: performing a shot peening operation on the welded part after performance testing. The welded part is shot peened as a whole to perform surface strengthening. Exemplarily, after step S150, step S160 may be performed, including: performing an ultrasonic test and a coloring test on the weld of the welded part after shot peening to obtain a blank 10'. Among them, the weld is subjected to 100% ultrasonic flaw detection and 100% coloring inspection.

[0054] Step S200 , performing rough boring preparation on the blank body 10 ′.

[0055] The blank body 10' is rough bored and prepared for subsequent rough turning operations. Step S200 specifically includes:

[0056] Step S210 : supporting the blank 10 ′ at a supporting position by using the supporting tool 20 .

[0057] The support fixture 20 can support and position the blank 10' to facilitate operations such as boring. Figure 5 and Figure 6The support fixture 20 includes a support frame 210 and a fixture 220. The fixture 220 can clamp and install the blank 10'. For example, using the outer edge and end face of the shaft disc flange 1230 as references, the blank 10' is aligned using a gauge to position it in the support position. After the blank 10' is in the support position, the clearance of each part of the blank 10' is checked.

[0058] In step S220 , a first initial installation end surface is bored out of the disc body 120 away from the shaft body 110 , and a second initial installation end surface is bored out of an end of the shaft body 110 away from the disc body 120 .

[0059] Reference Figure 2 and Figure 6 The first and second primary installation end faces are located at opposite ends of the blank 10'. The arrangement of the first and second primary installation end faces facilitates subsequent operations on the first and second primary installation end faces.

[0060] Step S230: Install the first clamping fixture 30 to the first initial installation end surface.

[0061] Combined with reference Figure 2 and Figure 3 The first clamping tool 30 may include a disc-shaped structure 320 and a columnar structure 310 connected to the disc-shaped structure 320. The disc-shaped structure 320 is connected to the first initial installation end face. At least part of the columnar structure 310 protrudes from the first initial installation end face for installation and fixation with an external lathe mounting part.

[0062] Step S240 , a first center hole is machined on the first clamping fixture 30 , and a second center hole is machined on the second initial installation end face, wherein the axis of the first center hole coincides with the axis of the second center hole.

[0063] The line connecting the center of the first center hole and the center of the second center hole can be used as the center line for subsequent clamping. The provision of the first clamping fixture 30 facilitates subsequent installation and fixation with external lathe mounting parts. Steps S210, S220, S230, and S240 are all performed when the blank 10' is in the support position. That is, during steps S210, S220, S230, and S240, the blank 10' is always on the support fixture 20, which can minimize the movement of the blank 10'.

[0064] Step S250 : installing the blank 10 ′ to a lathe station via the first clamping fixture 30 .

[0065] The first clamping fixture 30 can better fix the blank 10 ′ on the lathe station to ensure the accuracy of subsequent lathe-related steps.

[0066] Step S300 , rough turning the blank body 10 ′ prepared by rough boring to form a special-shaped shaft processing body;

[0067] Specifically, step S300 may include: step S310, calibrating and aligning the blank body 10'; step S320, checking the deformation of the blank body 10'; step S330, checking the machining allowance of each part of the blank body 10'; step S340, rough turning each part of the blank body 10' and leaving a 3mm allowance on one side; thus, forming a special-shaped shaft processing body;

[0068] Step S400 : performing build-up welding on the special-shaped shaft processing body 10 .

[0069] The surfacing step can improve the surface hardness of this part of the special-shaped shaft processing body 10, that is, improve the surface hardness of the special-shaped shaft after processing, so as to ensure the safety and stability of the operation of the special-shaped shaft.

[0070] Step S500 , semi-finishing the special-shaped shaft processed body 10 after surfacing welding.

[0071] Semi-finishing can be understood as further processing based on rough boring and rough turning. The processing accuracy of semi-finishing is greater than that of rough boring and rough turning.

[0072] In step S600 , the semi-finished special-shaped shaft processing body 10 is subjected to finish machining to form the special-shaped shaft 100 .

[0073] That is to say, the special-shaped shaft processed body 10 formed after the rough body 10' is rough bored and rough turned needs to be semi-finished and finished in sequence to ensure the accuracy of the special-shaped shaft obtained after processing.

[0074] In the special-shaped shaft processing method provided in the present application, the rough boring of the blank body 10' is performed by using the first clamping fixture 30, so that the blank body 10' and the special-shaped shaft processing body 10 formed by the blank body 10' can be installed and fixed on a lathe or other equipment for turning to ensure processing accuracy. In the step of preparing for rough boring of the blank body 10', the first clamping fixture 30 is installed, and the blank body 10' is always supported on the supporting fixture 20, which reduces the movement of the blank body 10' and simplifies the processing process. The supporting fixture 20 can realize the horizontal clamping and fixation of the blank body 10' and the special-shaped shaft processing body 10 formed by the blank body 10', thereby realizing the processing of the first center hole and the second center hole.

[0075] Exemplarily, step S230 may include:

[0076] In step S231, a first mounting groove 1202 is bored on the first initial mounting end surface. In step S232, the first mounting fixture 30 is installed in the first mounting groove 1202. This arrangement ensures a stable connection between the first mounting fixture 30 and the blank body 10'. The shape of the first mounting groove 1202 can be adapted to the first mounting fixture 30. For example, the first mounting groove 1202 can include a stop and an internal screw hole. Furthermore, the internal screw hole can be formed by tapping. For example, the first mounting fixture 30 can be interference-fitted into the first mounting groove 1202.

[0077] For example, referring to Figure 4 The blank 10' may include a shaft 110 and a disk 120 connected to one end of the shaft 110. The first primary mounting end face is located on the disk 120, and the second primary mounting end face is located on the shaft 110. A weld overlay region 1101 is formed on the side of the shaft 110 away from the second primary mounting end face. Step S400 may include: step S450, turning the weld overlay region 1101 to form a base for weld overlay within the weld overlay region 1101; and step S470, performing weld overlay on the weld overlay region 1101. The weld overlay coating may include a nickel-based alloy. The coating may increase the surface hardness of the portion of the shaped shaft processing body 10 corresponding to the weld overlay region 1101, that is, increase the surface hardness of the shaped shaft after processing. For example, after the nickel-based alloy coating is applied to the portion of the shaped shaft processing body 10 corresponding to the weld overlay region 1101, the surface hardness may be greater than or equal to 58 HRC. For example, the coating thickness may be no less than 0.5 mm. In step S470, the special-shaped shaft processing body 10 needs to be removed from the lathe and installed on the surfacing equipment.

[0078] For example, step S460 may be included between step S450 and step S470 to perform a color inspection on the substrate. Non-destructive testing is performed on the substrate to ensure that the substrate has no surface cracks or other problems, so as to ensure the subsequent surfacing effect and thus ensure the safety of the special-shaped shaft during operation.

[0079] For example, after step S470, step S480 may be further included to perform a coloring inspection on the surface of the coating to check whether there are bubbles inside the coating itself.

[0080] For example, step S480 may include step S485, which is to remove the first clamping tool 30. The first clamping tool 30 is removed to facilitate subsequent operations such as stress relief.

[0081] Exemplarily, after step S480, step S490 may also be included. Step S490 includes: stress relief of the special-shaped shaft processing body 10 after surfacing. Stress relief can eliminate welding stress and machining stress. In the embodiment with step S120, although step S490 and step S120 both relieve stress, since the stress relief operations are in different steps, the states of the corresponding workpieces are also different. The specific operations of stress relief in step S490 and step S120 are also different, including but not limited to different temperatures and different durations. The purpose of different stress relief operations is to eliminate the residual stress in the workpiece.

[0082] For example, step S500 may include: step S510, performing semi-finish boring preparation on the shaped shaft processing body 10 after build-up welding. The semi-finish boring is performed on the shaped shaft processing body 10 to prepare for subsequent semi-finish turning and other operations.

[0083] Exemplarily, step S510 may include:

[0084] In step S512, the special-shaped shaft processing body 10 is supported at a supporting position by the supporting fixture 20. That is, the special-shaped shaft processing body 10 is mounted on the supporting fixture 20 for subsequent semi-finishing boring and other operations.

[0085] In step S513, the first preliminary mounting end surface is semi-finished bored to form a first fine mounting end surface, and the second preliminary mounting end surface is semi-finished bored to form a second fine mounting end surface. The first fine mounting end surface can be formed by boring the first preliminary mounting end surface. The second preliminary mounting end surface can be formed by boring the second preliminary mounting end surface.

[0086] Step S514: boring a second installation groove on the first fine installation end surface.

[0087] Step S515: Install the second clamping tool into the second installation slot.

[0088] In step S516, a third center hole is machined on the second fixture and a fourth center hole is machined on the second finishing end face. The axes of the third and fourth center holes coincide with the axis of the special-shaped shaft processing body 10. The line connecting the centers of the third and fourth center holes can be used as the centerline for subsequent fixture work.

[0089] Steps S512, S513, S514, S515, and S516 are all performed when the special-shaped shaft processing body 10 is in the support position. That is, during steps S512, S513, S514, S515, and S516, the special-shaped shaft processing body 10 is always on the support fixture 20, which minimizes the movement of the special-shaped shaft processing body 10. The support fixture 20 can achieve horizontal clamping and fixation of the special-shaped shaft processing body 10, thereby achieving machining of the third center hole center and the fourth center hole center.

[0090] After stress relief, the structure of the shaped shaft processing body 10 inevitably changes to some extent. Semi-finish boring of the shaped shaft processing body 10 allows the centerline to be re-established based on the stress-relieved shaped shaft processing body 10, ensuring the accuracy of subsequent operations. The provision of a second fixture allows for easier installation on the lathe for subsequent turning operations.

[0091] Step S500 may include: Step S550, semi-finish turning the semi-finished shaped shaft processing body 10. For example, Step S550 may include: Step S551, mounting the shaped shaft processing body 10 on a lathe workstation using a second fixture; Step S552, calibrating the mounted shaped shaft processing body 10; Step S553, checking the dimensions and machining allowances of various components of the shaped shaft processing body 10; and Step S554, semi-finish turning each component of the shaped shaft processing body 10, leaving a 2mm allowance on each side. In this way, further machining of the shaped shaft processing body 10, through multi-level machining, can better ensure the precision of the finished shaped shaft.

[0092] Exemplarily, step S554 may include the following steps: step S5541, processing the outer circle of the shaft disc flange 1230 to the upper limit according to the specified size; step S5542, the axial end face of the shaft disc flange 1230 has a sandblasting area 1201, and the sandblasting area 1201 is turned so that the roughness of the sandblasting area 1201 reaches Ra6.3; step S5543, processing the outer end face of the first support disc 1210 and the outer end face of the second support disc 1220 according to the specified size, the outer end face of the first support disc 1210 is conical and processed to a predetermined size (which can be understood as the drawing size); step S5544, turning the radial parts of the shaft body 110, the arc structure at the connection between the disc body 120 and the shaft body 110, and the end face of the shaft body 110 away from the disc body 120 and leaving a 2mm margin.

[0093] For example, step S600 may include: step S610, performing finish turning on the semi-finished shaped shaft processing body 10 to form the shaped shaft 100. The shaped shaft processing body 10 undergoes multiple boring and turning operations to ensure machining efficiency and accuracy. Specifically, in step S610, the shaped shaft processing body 10 may first be clamped and aligned, and the machining allowance of each component may be checked. The shaped shaft processing body 10 may then be finish turned, the bearing area may be ground, and the vibration measurement area may be rolled.

[0094] For example, after step S610, the process may further include step S650, performing magnetic particle inspection and repair on the shaped shaft 100. Specifically, the process includes step S651: performing magnetic particle inspection on each part of the shaped shaft 100; and step S652: repairing the shaped shaft 100 after magnetic particle inspection. Magnetic particle inspection can be performed on each part of the shaped shaft 100 to ensure machining accuracy. Repair may include cleaning each part, removing burrs, and removing the second clamping fixture to protect the shaped shaft 100 from scratches.

[0095] For example, a sandblasted area 1201 may be formed on the radial outer edge of the disc body 120. After step S610, the process may further include step S630 of sandblasting the sandblasted area 1201 corresponding to the shaped shaft 100. Sandblasting the sandblasted area 1201 can further increase the coefficient of friction of the friction area. In step S5542, turning can achieve a roughness of Ra 6.3 in the sandblasted area 1201. After step S630, the roughness of the sandblasted area 1201 can reach Ra 12.5.

[0096] For example, with reference to Figure 6 and Figure 7 Step S630 may include the following steps: Step S631, supporting the shaped shaft 100 in a supporting position using the support fixture 20; Step S632, installing the sandblasting protection fixture 40 on the side of the plate 120 facing away from the shaft body 110; Step S633, sandblasting the sandblasting area 1201. This prevents other parts of the shaped shaft 100 from being affected when sandblasting the sandblasting area 1201. The support fixture 20 supports the shaped shaft 100, making full use of the support fixture 20, minimizing movement of the shaped shaft 100, and achieving a more efficient processing process.

[0097] For example, after step S630, step S660 may be further included to perform boring processing on the sandblasted special-shaped shaft 100. Specifically, step S660 may include:

[0098] Step S661, supporting the sandblasted special-shaped shaft 100 by the supporting fixture 20;

[0099] Step S662, boring the engaging holes, bottom holes of the screw holes and tapping the threads on the circumference of the end surface of the shaft plate flange 1230;

[0100] Step S663 , boring the bottom holes of the screw holes at various locations on the circumference of the end surface of the shaft body 110 away from the disk body 120 , and tapping the threads.

[0101] For example, after step S660, step S670 may be further included: cleaning and trimming the special-shaped shaft 100, performing an endoscopic inspection on the space between the first support plate 1210 and the second support plate 1220, and sealing the open space after confirming that there are no iron filings or any other foreign matter.

[0102] After step S670, the process may further include step S710, a confirmation inspection, in which the quality control department performs an endoscopic inspection again for confirmation.

[0103] After step S710, step S720 may be further included for demagnetization. This step may be performed according to the mechanical runout and electrical runout test process specifications and will not be described in detail here.

[0104] After step S720, the process may further include step S730 of measuring electrical runout. This step may be performed according to the mechanical runout and electrical runout test process specifications, and the test data may be recorded and stored by the process engineer.

[0105] After step S730, step S740 may be further included: dynamic balancing. This step is performed in accordance with the operating procedures of the dynamic balancing machine, using a belt drive method, and the remaining unbalance is not greater than a predetermined value, and weight removal is performed.

[0106] After step S740 , the process may further include step S750 , assembling the processed special-shaped shaft 100 and the rotor.

[0107] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front", "back", "up", "down", "left", "right", "horizontal", "vertical", "vertical", "horizontal", "top", "bottom", etc. are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside" and "outside" refer to the inside and outside relative to the outline of each component itself.

[0108] For ease of description, area-relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the regional positional relationship between one or more components or features shown in the figures and other components or features. It should be understood that area-relative terms include not only the orientation of the components as described in the figures, but also different orientations in use or operation. For example, if the components in the drawings are inverted as a whole, the situation where the components are "above other components or features" or "above other components or features" will include the situation where the components are "below other components or structures" or "below other components or structures". Thus, the exemplary term "above" may include both the orientations "above" and "below". In addition, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document is intended to include all of these situations.

[0109] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, parts, components and / or combinations thereof.

[0110] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0111] The present invention has been described through the above-described embodiments. However, it should be understood that the above-described embodiments are for illustrative and illustrative purposes only and are not intended to limit the present invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments and that various variations and modifications may be made based on the teachings of the present invention, all of which fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for processing a special-shaped shaft, characterized in that: include: A prefabricated blank body, the blank body comprising a shaft body and a disc body welded to one end of the shaft body; Performing rough boring preparation on the blank, including supporting the blank in a supporting position by a supporting fixture, boring a first preliminary installation end surface at an end of the disk body away from the shaft body, boring a second preliminary installation end surface at an end of the shaft body away from the disk body, installing a first clamping fixture to the first preliminary installation end surface, machining a first center hole on the first clamping fixture, machining a second center hole on the second preliminary installation end surface, wherein the axis of the first center hole coincides with the axis of the second center hole, and mounting the blank to a lathe station by the first clamping fixture; Rough turning the blank body prepared by rough boring to form a special-shaped shaft processing body; Performing surfacing welding on the special-shaped shaft processing body; Performing semi-finishing processing on the special-shaped shaft processed body after surfacing welding; The semi-finished special-shaped shaft processed body is finished to form the special-shaped shaft.

2. The special-shaped shaft processing method according to claim 1, characterized in that: The step of installing the first clamping tool to the first initial installation end face includes: boring a first mounting groove on the first initial mounting end surface; Install the first clamping tool into the first installation slot.

3. The special-shaped shaft processing method according to claim 1, characterized in that: A surfacing area is formed on a side of the shaft body away from the second initial installation end face, and the step of surfacing the special-shaped shaft processing body includes: Lathing the surfacing area to form a base for surfacing in the surfacing area; Performing buildup welding on the buildup welding area.

4. The method for processing a special-shaped shaft according to claim 3, wherein: Before the step of semi-finishing the special-shaped shaft processed body after surfacing welding, the method includes: performing stress relief on the special-shaped shaft processed body after surfacing welding.

5. The method for processing a special-shaped shaft according to claim 4, characterized in that: The step of semi-finishing the special-shaped shaft processed body after surfacing welding comprises: Performing semi-finish boring preparation on the special-shaped shaft processed body after surfacing welding; The semi-finished boring of the special-shaped shaft processed body is semi-finished.

6. The method for processing a special-shaped shaft according to claim 5, characterized in that: The step of semi-finish boring the special-shaped shaft processed body after surfacing welding comprises: Supporting the special-shaped shaft processing body at the supporting position by the supporting tool; Performing semi-finish boring on the first preliminary installation end surface to form a first fine installation end surface, and performing semi-finish boring on the second preliminary installation end surface to form a second fine installation end surface; boring a second mounting groove on the first precision mounting end surface; Install a second clamping fixture to the second installation slot; A third center hole is machined on the second clamping fixture, and a fourth center hole is machined on the second fine installation end face. The axes of the third center hole and the fourth center hole coincide with the axis of the special-shaped shaft processing body.

7. The method for processing a special-shaped shaft according to claim 1, wherein: The step of performing finish machining on the semi-finished special-shaped shaft body includes: performing finish machining on the semi-finished special-shaped shaft body to form the special-shaped shaft.

8. The method for processing a special-shaped shaft according to claim 7, wherein: A sandblasting area is formed at the radial outer edge of the disc body, and after the step of finishing turning the semi-finished special-shaped shaft processing body to form the special-shaped shaft, the method includes: The sandblasting area corresponding to the special-shaped shaft is sandblasted.

9. The method for processing a special-shaped shaft according to claim 8, characterized in that: The step of sandblasting the sandblasting area corresponding to the special-shaped shaft includes: Supporting the special-shaped shaft at the supporting position by the supporting fixture; Install a sandblasting protective tool on the side of the disc body away from the shaft body; The blasting area is sandblasted.

10. The method for processing a special-shaped shaft according to claim 8, wherein: After the step of sandblasting the sandblasting area corresponding to the special-shaped shaft, the method further comprises: Boring the special-shaped shaft after sandblasting; The special-shaped shaft after boring is subjected to clamp repair processing.

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