A high-precision inertia friction welding method for a compressor rotor assembly

Abstract

The application discloses an inertial friction welding method for a high-precision compressor rotor assembly, and has the steps of designing a welding structure diagram, determining a stress position of a welding part, determining a welding sequence, measuring disc core radial runout and disc core end face runout precision of a part to be welded, clamping a reference disc to a tailstock, clamping a disc of a previous stage to a main shaft side, inputting welding parameters, and completing welding; measuring disc core radial runout and end face runout precision, processing welding flash of the welding assembly, clamping the welding assembly to the tailstock, inputting welding parameters, and completing welding; measuring disc core radial runout and end face runout precision, processing welding flash of the welding assembly, clamping the welding assembly to the tailstock, completing welding, and measuring disc core radial runout and end face runout precision. The application has the advantages that the problem of disc core radial runout and end face runout radial runout out-of-tolerance after welding of the compressor rotor assembly is solved, welding rigidity can be improved during the welding process, welding deformation is reduced, the machining difficulty after welding is reduced, and machining quality and efficiency are improved.

Description

Technical Field

[0001] This invention relates to the field of welding, and in particular to an inertial friction welding method for a high-precision compressor rotor assembly. Background Technology

[0002] The compressor rotor assembly is an extremely important component in an aero-engine. It is generally made up of multiple compressor discs welded together. The compressor rotor assembly has to withstand tens of thousands of high-speed rotations per minute. Therefore, the manufacturing precision requirements for the compressor assembly are extremely strict. If the manufacturing precision exceeds the dimensional requirements of the design drawings, the dynamic balance level of the compressor assembly will decrease, which will cause problems such as vibration of the compressor rotor at high speed.

[0003] Existing technology uses inertial friction welding to weld multiple high-temperature alloy compressor discs into a single compressor rotor assembly. However, the welded structure in this invention lacks sufficient rigidity, and the welded parts deform during the welding process. This results in the disc center diameter runout and end runout of the compressor rotor assembly exceeding the 0.20mm accuracy requirement. Excessive disc center diameter runout and end runout will increase the imbalance of the compressor assembly, decrease the dynamic balance level, and cause vibration problems in the compressor rotor at high speeds. Furthermore, an unreasonable selection of welding reference points can also cause the disc center diameter runout and end runout of the entire compressor assembly to exceed the 0.20mm accuracy requirement. Inappropriate machining allowances in the welding method also increase the machining difficulty of the welded assembly, making it impossible to machine the internal cavity of the welded assembly, and reducing machining efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide an inertial friction welding method for high-precision compressor rotor assemblies, which can solve the problem of excessive welding accuracy in inertial friction welding of compressor rotor assemblies.

[0005] This invention provides an inertial friction welding method for a high-precision compressor rotor assembly, characterized in that: the inertial friction welding method for the high-precision compressor rotor assembly includes the following steps:

[0006] Step 1: Design the pre-welding structural drawing based on the component drawings of each stage of the compressor;

[0007] The maximum outer diameter of the pre-welding structural drawing is 1-6mm larger than the maximum outer diameter of the part. The outer diameter of the welding surface in the pre-welding structural drawing is 1-3mm larger than the outer diameter of the welding area in the part drawing. The inner diameter of the welding surface in the pre-welding structural drawing is 1-3mm smaller than the inner diameter of the welding area in the part drawing. The last stage compressor disc is selected as the reference disc. The outer diameter of the clamping outer circle of the reference disc is 1-3mm smaller than the outer diameter of the outer circles of other discs. The outer diameters of the other discs are the same. After welding, the outer circle with the larger outer diameter is machined to be the same as the outer diameter of the reference disc. The pre-welding structure of the reference disc should retain a margin of 10-40mm at the clamping position. After welding, the radial runout and end face runout of the reference disc should be less than 0.20mm.

[0008] Step 2: Determine the stress points on the pre-welding structural drawing. The outer circle of the pre-welding structural drawing is subjected to circumferential clamping force applied by the clamping fixture. The clamping force area covers 90%-100% of the outer circle's surface dimension. The circumferential clamping force of the reference plate is in two locations: one is located on the large-diameter outer circle as an auxiliary clamp, and the other is located on the small-diameter outer circle as the main clamp. The main clamping force is greater than the auxiliary clamping force on the large-diameter outer circle. The stiffness at the small-diameter outer circle is higher than that at the large-diameter outer circle. The axial welding pressure of the reference plate is located on the side of the large outer circle, and the axial pressure of other compressor discs is located on the side of the large outer circle. The axial pressure should be on the same axis as the welding surface.

[0009] Step 3: Determine the welding sequence;

[0010] The last stage disk is used as the reference disk. The welding sequence is to weld the previous stage disks of the reference disk onto the components of the reference disk in sequence. The outer circle reference of the reference disk is used as the accuracy inspection reference for subsequent welding components. The reference disk is clamped at the tailstock end. The tailstock clamping fixture is always clamped at the outer circle of the reference disk. Each subsequent stage compressor single disk is welded onto the reference disk in sequence.

[0011] Step 4: Measure the accuracy of the radial runout and end face runout of the disk center of all parts to be welded. The accuracy of the radial runout and end face runout of the disk center of all parts to be welded shall not exceed 0.05mm.

[0012] Step 5: Clamp the reference plate onto the tailstock, and clamp the upper-level plate onto the spindle side. The parts of the spindle and tailstock are coaxial.

[0013] Step Six: Input welding parameters and complete the welding;

[0014] Step 7: Measure the radial runout and end face runout accuracy of the two-stage disks;

[0015] Step 8: Remove welding flash from the welded components;

[0016] Completely remove the welding flash, process the welding allowance in the inner cavity, process and remove all the welding allowance in the inner cavity, remove a portion of the allowance on the outer circle of the main shaft measuring compressor plate, the outer circle diameter is the same as the outer circle of the reference plate, and process a welding boss at the other end of the welding assembly.

[0017] Step 9: Clamp the welding assembly onto the tailstock, the tailstock clamping fixture holds the reference plate, and clamp the pad to be welded onto the spindle. The parts of the spindle and the tailstock are coaxial.

[0018] Step 10: Input welding parameters and complete the welding;

[0019] Step 11: Measure the radial runout and end face runout accuracy of the disk center; the welding accuracy should be within 0-0.20mm.

[0020] Step 12: Remove the welding flash from the welded components;

[0021] Remove all welding flash, machine the welding allowance in the inner cavity, remove all the welding allowance in the inner cavity, remove a portion of the allowance on the outer circle of the main shaft measuring compressor plate, and make the outer circle diameter the same as the outer circle of the reference plate.

[0022] Compared with the prior art, the advantages of this invention are:

[0023] This invention provides an inertial friction welding method for high-precision compressor rotor assemblies. Compared with existing technologies, it effectively solves the problem of excessive radial runout of the rotor core and end face after welding. This invention also designs a targeted welding structure based on the part drawings. This structure improves welding rigidity, reduces welding deformation, lowers post-weld machining difficulty, and increases machining efficiency, thereby improving the manufacturing quality and production efficiency of the compressor rotor assembly. The accuracy pass rate has increased from 60% to 90%, reducing the machining difficulty of the compressor rotor assembly, increasing the machining efficiency of the compressor assembly, and shortening the machining time for each part. Attached Figure Description

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0025] Figure 1 Drawings of the various stages of the compressor discs;

[0026] Figure 2 This is a schematic diagram of the structure before welding;

[0027] Figure 3 A schematic diagram of the welding of compressor discs A and B;

[0028] Figure 4 This is a schematic diagram of the post-weld processing of the compressor disc AB;

[0029] Figure 5This is a schematic diagram of the welding of compressor discs AB and C;

[0030] In the diagram, 1-maximum outer diameter of the part, 2-maximum outer circle of the pre-welding structural drawing, 3-outer diameter of the welding surface in the pre-welding structural drawing, 4-outer diameter of the welding area in the part drawing, 5-inner diameter of the welding surface in the pre-welding structural drawing, 6-outer diameter of the welding area in the part drawing, 7-reference plate A, 8-outer circle of compressor plate B, 9-outer circle of compressor plate C, 10-clamping position allowance of reference plate A, 11-radial runout measurement position of the web of reference plate, 12-runout measurement position of the end face of the web of reference plate A, 13-main clamping of reference plate A, 14-location of axial welding pressure of reference plate A, 15-compressor plate B 16 - Location of axial welding pressure; 17 - Location of axial welding pressure of compressor disc C; 18 - Location of web end face runout measurement after welding of compressor discs A and B; 19 - Location of radial runout measurement of web after welding of compressor discs A and B; 20 - Inner cavity allowance; 21 - Location of allowance removal on the outer circle of compressor disc on the main shaft side; 22 - Welding boss; 23 - Location of radial runout measurement of web after welding of compressor discs AB and C; 24 - Location of web end face runout measurement after welding of compressor discs AB and C; 25 - Welding burr; 26 - Location of allowance removal on the outer circle of compressor disc on the main shaft side. Detailed Implementation

[0031] The present invention will be further explained below with reference to specific implementation schemes, but it is not limited to the present invention. The structures, proportions, sizes, etc. shown in the accompanying drawings are only used to complement the content disclosed in the specification, so as to enable those skilled in the art to understand and read, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that the present invention can produce, still falls within the scope of the technical content disclosed in the present invention.

[0032] Example 1

[0033] A method for inertial friction welding of a high-precision compressor rotor assembly includes the following steps:

[0034] Step 1: As Figure 1 As shown, based on the component drawings of each stage of the compressor, a pre-welding structural drawing is designed, such as... Figure 2 ;

[0035] The outer diameter of the maximum outer circle 2 in the pre-welding structural drawing is 11mm larger than the maximum outer diameter of the part. The outer diameter 3 of the welding surface in the pre-welding structural drawing is 41mm larger than the outer diameter of the welding part in the part drawing. The inner diameter 5 of the welding surface in the pre-welding structural drawing is 61mm smaller than the inner diameter of the welding part in the part drawing. The last stage compressor disc is selected as the reference disc 7. The outer diameter of the clamping outer circle 8 of the reference disc is 1.5mm smaller than the outer diameters of the outer circles 8 and 9 of the other discs. The outer circles 8 and 9 of the other discs have the same diameter. After welding, the outer circle with the larger outer diameter will be machined to be the same as the outer diameter of the reference disc. The pre-welding structure of the reference disc should retain a margin of 10mm at the clamping position. After welding, the radial runout 11 and end face runout 12 of the reference disc should be less than 0.20mm.

[0036] Step 2: Determine the stress points in the pre-welding structural drawing. The outer circle of the pre-welding structural drawing is subjected to circumferential clamping force applied by the clamping fixture. The clamping force area covers 90% of the outer circle's surface dimension. The circumferential clamping force of the reference plate is in two locations: one is located on the large-diameter outer circle as auxiliary clamping 2, and the other is located on the small-diameter outer circle as main clamping 13. The main clamping force is greater than the auxiliary clamping force on the large-diameter outer circle. The stiffness at the small-diameter outer circle is higher than that at the large-diameter outer circle. The axial welding pressure 14 of the reference plate is located on the side of the large outer circle. The axial pressure of other compressor discs is located on the side of the large outer circle 15 and 16. The axial pressure should be on the same axis as the welding surface.

[0037] Step 3: Determine the welding sequence;

[0038] The last stage disk is used as the reference disk. The welding sequence is to weld the previous stage disks of the reference disk onto the components of the reference disk in sequence. The outer circle reference of the reference disk is used as the accuracy inspection reference for subsequent welding components. The reference disk is clamped at the tailstock end. The tailstock clamping fixture is always clamped at the outer circle of the reference disk. Each subsequent stage compressor single disk is welded onto the reference disk in sequence.

[0039] Step 4: Measure the accuracy of the radial runout and end face runout of the disk center of all parts to be welded. The accuracy of the radial runout and end face runout of the disk center of all parts to be welded shall not exceed 0.05mm.

[0040] Step 5: Clamp the reference plate onto the tailstock, and clamp the upper-level plate onto the spindle side. The parts of the spindle and tailstock are coaxial.

[0041] Step Six: Input welding parameters and complete the welding;

[0042] Step Seven: As Figure 3 As shown, the accuracy of measuring the radial runout 18 and end face runout 17 of the two-stage disks is measured.

[0043] Step 8: Remove the welding flash 19 from the welded components;

[0044] like Figure 4 As shown, the welding flash is completely removed, the welding allowance 20 in the inner cavity is machined, all the welding allowance in the inner cavity is machined and removed, a portion of the allowance 21 in the outer circle of the main shaft measuring air compressor plate is removed, the outer circle diameter is the same as the outer circle of the reference plate, and a welding boss 22 is machined at the other end of the welding assembly.

[0045] Step 9: Clamp the welding assembly onto the tailstock, the tailstock clamping fixture holds the reference plate, and clamp the pad to be welded onto the spindle. The parts of the spindle and the tailstock are coaxial.

[0046] Step 10: Input welding parameters and complete the welding;

[0047] Step 11: As Figure 5 As shown, the accuracy of radial runout 23 and end face runout 24 of the disc center is measured, and the welding accuracy is within 0-0.20mm;

[0048] Step 12: Remove the welding flash (25mm) from the welded components;

[0049] Remove all welding flash, machine the welding allowance in the inner cavity, remove all the welding allowance in the inner cavity, remove a portion of the allowance 26 on the outer circle of the main shaft measuring compressor plate, and make the outer circle diameter the same as the outer circle of the reference plate.

[0050] Example 2

[0051] A method for inertial friction welding of a high-precision compressor rotor assembly includes the following steps:

[0052] Step 1: As Figure 1 As shown, based on the component drawings of each stage of the compressor, a pre-welding structural drawing is designed, such as... Figure 2 ;

[0053] The outer diameter of the maximum outer circle 2 in the pre-welding structural drawing is 13mm larger than the maximum outer diameter of the part. The outer diameter 3 of the welding surface in the pre-welding structural drawing is 41.5mm larger than the outer diameter of the welding part in the part drawing. The inner diameter 5 of the welding surface in the pre-welding structural drawing is 61.5mm smaller than the inner diameter of the welding part in the part drawing. The last stage compressor disc is selected as the reference disc 7. The outer diameter of the clamping outer circle 8 of the reference disc is 1.5mm smaller than the outer diameters of the outer circles 8 and 9 of the other discs. The outer circles 8 and 9 of the other discs have the same diameter. After welding, the outer circle with the larger outer diameter will be machined to be the same as the outer diameter of the reference disc. The pre-welding structure of the reference disc should retain a margin 10 at the clamping position. The margin is 20mm. After welding, the radial runout 11 and end face runout 12 of the reference disc are less than 0.20mm.

[0054] Step 2: Determine the stress points in the pre-welding structural drawing. The outer circle of the pre-welding structural drawing is subjected to circumferential clamping force applied by the clamping fixture. The clamping force area covers 95% of the outer circle's surface dimension. The circumferential clamping force of the reference plate is in two locations: one is located on the large-diameter outer circle as auxiliary clamping 2, and the other is located on the small-diameter outer circle as main clamping 13. The main clamping force is greater than the auxiliary clamping force on the large-diameter outer circle. The stiffness at the small-diameter outer circle is higher than that at the large-diameter outer circle. The axial welding pressure 14 of the reference plate is located on the side of the large outer circle. The axial pressure of other compressor discs is located on the side of the large outer circle 15 and 16. The axial pressure should be on the same axis as the welding surface.

[0055] Step 3: Determine the welding sequence;

[0056] The last stage disk is used as the reference disk. The welding sequence is to weld the previous stage disks of the reference disk onto the components of the reference disk in sequence. The outer circle reference of the reference disk is used as the accuracy inspection reference for subsequent welding components. The reference disk is clamped at the tailstock end. The tailstock clamping fixture is always clamped at the outer circle of the reference disk. Each subsequent stage compressor single disk is welded onto the reference disk in sequence.

[0057] Step 4: Measure the accuracy of the radial runout and end face runout of the disk center of all parts to be welded. The accuracy of the radial runout and end face runout of the disk center of all parts to be welded shall not exceed 0.05mm.

[0058] Step 5: Clamp the reference plate onto the tailstock, and clamp the upper-level plate onto the spindle side. The parts of the spindle and tailstock are coaxial.

[0059] Step Six: Input welding parameters and complete the welding;

[0060] Step Seven: As Figure 3 As shown, the accuracy of measuring the radial runout 18 and end face runout 17 of the two-stage disks is measured.

[0061] Step 8: Remove the welding flash 19 from the welded components;

[0062] like Figure 4 As shown, the welding flash is completely removed, the welding allowance 20 in the inner cavity is machined, all the welding allowance in the inner cavity is machined and removed, a portion of the allowance 21 in the outer circle of the main shaft measuring air compressor plate is removed, the outer circle diameter is the same as the outer circle of the reference plate, and a welding boss 22 is machined at the other end of the welding assembly.

[0063] Step 9: Clamp the welding assembly onto the tailstock, the tailstock clamping fixture holds the reference plate, and clamp the pad to be welded onto the spindle. The parts of the spindle and the tailstock are coaxial.

[0064] Step 10: Input welding parameters and complete the welding;

[0065] Step 11: As Figure 5As shown, the accuracy of radial runout 23 and end face runout 24 of the disc center is measured, and the welding accuracy is within 0-0.20mm;

[0066] Step 12: Remove the welding flash (25mm) from the welded components;

[0067] Remove all welding flash, machine the welding allowance in the inner cavity, remove all the welding allowance in the inner cavity, remove a portion of the allowance 26 on the outer circle of the main shaft measuring compressor plate, and make the outer circle diameter the same as the outer circle of the reference plate.

[0068] Example 3

[0069] A method for inertial friction welding of a high-precision compressor rotor assembly includes the following steps:

[0070] Step 1: As Figure 1 As shown, based on the component drawings of each stage of the compressor, a pre-welding structural drawing is designed, such as... Figure 2 ;

[0071] The outer diameter of the maximum outer circle 2 in the pre-welding structural drawing is 16mm larger than the maximum outer diameter of the part. The outer diameter 3 of the welding surface in the pre-welding structural drawing is 43mm larger than the outer diameter of the welding part in the part drawing. The inner diameter 5 of the welding surface in the pre-welding structural drawing is 63mm smaller than the inner diameter of the welding part in the part drawing. The last stage compressor disc is selected as the reference disc 7. The outer diameter of the clamping outer circle 8 of the reference disc is 3mm smaller than the outer diameters of the outer circles 8 and 9 of the other discs. The outer circles 8 and 9 of the other discs have the same diameter. After welding, the outer circle with the larger outer diameter will be machined to be the same as the outer diameter of the reference disc. The pre-welding structure of the reference disc should retain a margin 10 at the clamping position, with a margin of 40mm. After welding, the radial runout 11 and end face runout 12 of the reference disc should be less than 0.20mm.

[0072] Step 2: Determine the stress points in the pre-welding structural drawing. The outer circle of the pre-welding structural drawing is subjected to circumferential clamping force applied by the clamping fixture. The clamping force area covers 100% of the outer circle's surface dimension. The circumferential clamping force of the reference plate is in two locations: one is located on the large-diameter outer circle as auxiliary clamping 2, and the other is located on the small-diameter outer circle as main clamping 13. The main clamping force is greater than the auxiliary clamping force on the large-diameter outer circle. The stiffness at the small-diameter outer circle is higher than that at the large-diameter outer circle. The axial welding pressure 14 of the reference plate is located on the side of the large outer circle. The axial pressure of other compressor single plates is located on the side of the large outer circle 15 and 16. The axial pressure should be on the same axis as the welding surface.

[0073] Step 3: Determine the welding sequence;

[0074] The last stage disk is used as the reference disk. The welding sequence is to weld the previous stage disks of the reference disk onto the components of the reference disk in sequence. The outer circle reference of the reference disk is used as the accuracy inspection reference for subsequent welding components. The reference disk is clamped at the tailstock end. The tailstock clamping fixture is always clamped at the outer circle of the reference disk. Each subsequent stage compressor single disk is welded onto the reference disk in sequence.

[0075] Step 4: Measure the accuracy of the radial runout and end face runout of the disk center of all parts to be welded. The accuracy of the radial runout and end face runout of the disk center of all parts to be welded shall not exceed 0.05mm.

[0076] Step 5: Clamp the reference plate onto the tailstock, and clamp the upper-level plate onto the spindle side. The parts of the spindle and tailstock are coaxial.

[0077] Step Six: Input welding parameters and complete the welding;

[0078] Step Seven: As Figure 3 As shown, the accuracy of measuring the radial runout 18 and end face runout 17 of the two-stage disks is measured.

[0079] Step 8: Remove the welding flash 19 from the welded components;

[0080] like Figure 4 As shown, the welding flash is completely removed, the welding allowance 20 in the inner cavity is machined, all the welding allowance in the inner cavity is machined and removed, a portion of the allowance 21 in the outer circle of the main shaft measuring air compressor plate is removed, the outer circle diameter is the same as the outer circle of the reference plate, and a welding boss 22 is machined at the other end of the welding assembly.

[0081] Step 9: Clamp the welding assembly onto the tailstock, the tailstock clamping fixture holds the reference plate, and clamp the pad to be welded onto the spindle. The parts of the spindle and the tailstock are coaxial.

[0082] Step 10: Input welding parameters and complete the welding;

[0083] Step 11: As Figure 5 As shown, the accuracy of radial runout 23 and end face runout 24 of the disc center is measured, and the welding accuracy is within 0-0.20mm;

[0084] Step 12: Remove the welding flash (25mm) from the welded components;

[0085] Remove all welding flash, machine the welding allowance in the inner cavity, remove all the welding allowance in the inner cavity, remove a portion of the allowance 26 on the outer circle of the main shaft measuring compressor plate, and make the outer circle diameter the same as the outer circle of the reference plate.

[0086] Matters not covered in this invention are common knowledge.

[0087] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for inertial friction welding of a high-precision compressor rotor assembly, characterized in that: The inertial friction welding method for the high-precision compressor rotor assembly includes the following steps: Step 1: Design the pre-welding structural drawing based on the component drawings of each stage of the compressor; The maximum outer diameter of the pre-welding structural drawing is 1-6mm larger than the maximum outer diameter of the part. The outer diameter of the welding surface in the pre-welding structural drawing is 1-3mm larger than the outer diameter of the welding area in the part drawing. The inner diameter of the welding surface in the pre-welding structural drawing is 1-3mm smaller than the inner diameter of the welding area in the part drawing. The last stage compressor disc is selected as the reference disc. The outer diameter of the clamping outer circle of the reference disc is 1-3mm smaller than the outer diameter of the outer circles of other discs. The outer diameters of the other discs are the same. After welding, the outer circle with the larger outer diameter is machined to be the same as the outer diameter of the reference disc. The pre-welding structure of the reference disc should retain a margin of 10-40mm at the clamping position. After welding, the radial runout and end face runout of the reference disc should be less than 0.20mm. Step 2: Determine the stress points on the pre-welding structural drawing. The outer circle of the pre-welding structural drawing is subjected to circumferential clamping force applied by the clamping fixture. The clamping force area covers 90%-100% of the outer circle's surface dimension. The circumferential clamping force of the reference plate is in two locations: one is located on the large-diameter outer circle as an auxiliary clamp, and the other is located on the small-diameter outer circle as the main clamp. The main clamping force is greater than the auxiliary clamping force on the large-diameter outer circle. The stiffness at the small-diameter outer circle is higher than that at the large-diameter outer circle. The axial welding pressure of the reference plate is located on the side of the large outer circle, and the axial pressure of other compressor discs is located on the side of the large outer circle. The axial pressure should be on the same axis as the welding surface. Step 3: Determine the welding sequence; The last stage disk is used as the reference disk. The welding sequence is to weld the previous stage disks of the reference disk onto the components of the reference disk in sequence. The outer circle reference of the reference disk is used as the accuracy inspection reference for subsequent welding components. The reference disk is clamped at the tailstock end. The tailstock clamping fixture is always clamped at the outer circle of the reference disk. Each subsequent stage compressor single disk is welded onto the reference disk in sequence. Step 4: Measure the accuracy of the radial runout and end face runout of the disk center of all parts to be welded; Step 5: Clamp the reference plate onto the tailstock and clamp the upper-level plate onto the spindle side. The parts of the spindle and tailstock are coaxial. Step Six: Input welding parameters and complete the welding; Step 7: Measure the radial runout and end face runout accuracy of the two-stage disks; Step 8: Remove welding flash from the welded components; Completely remove the welding flash, process the welding allowance in the inner cavity, process and remove all the welding allowance in the inner cavity, remove a portion of the allowance on the outer circle of the compressor disk on the main shaft side, the outer circle diameter is the same as the outer circle of the reference disk, and process a welding boss at the other end of the welding assembly. Step 9: Clamp the welding assembly processed in Step 8 onto the tailstock. The tailstock clamping fixture holds the reference plate. Clamp the plate to be welded onto the spindle. The parts of the spindle and the tailstock are coaxial. Step 10: Input welding parameters and complete the welding; Step 11: Measure the radial runout and end face runout accuracy of the disk center; the welding accuracy should be within 0-0.20mm. Step 12: Remove the welding flash from the welded components; Remove all welding flash, machine the welding allowance in the inner cavity, remove all the welding allowance in the inner cavity, remove a portion of the allowance on the outer circle of the compressor disk on the main shaft side, the outer circle diameter is the same as the outer circle of the reference disk, and machine a welding boss at the other end of the welding assembly for the next welding step. Step 13: Clamp the welded assembly processed in Step 12 onto the tailstock. The tailstock clamping fixture holds the reference plate, and the parts of the spindle and tailstock are coaxial. Step Fourteen: Input welding parameters and complete the welding; Step 15: Measure the radial runout and end face runout accuracy of the disk center; the welding accuracy should be within 0-0.20mm. Step 16: Remove the welding flash from the welding components and process the welding allowance in the inner cavity.

2. The inertial friction welding method for high-precision compressor rotor assembly according to claim 1, characterized in that: Step four: The accuracy of the radial runout and end face runout of the disk center of all the parts to be welded shall not exceed 0.05mm.

3. The inertial friction welding method for high-precision compressor rotor assembly according to claim 1, characterized in that: In step seven, the radial runout and end face runout accuracy of the two-stage disks, and the welding accuracy are within 0-0.20mm.

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