Machining method for driving ring of gas compressor

Abstract

The invention discloses a machining method for a gas compressor driving ring and relates to the technical field of machining. The problems that when an existing ring is machined, thermal deformation of the ring is easily caused by cutting heat, then the size precision is affected, and the position degree error rate of a key matching face is high due to repeated clamping are solved. The method comprises the following steps that firstly, a blank piece is clamped on a clamp, and then the clamp is fixed to a lathe machining position; secondly, an inner hole, a groove and an outer circle are roughly turned; thirdly, the clamp and the workpiece are moved to a milling machine machining position from the lathe machining position together; 4, roughly milling a boss; by means of reasonably arranging a machining method and an assembly process flow, designing a filling block for controlling deformation of the thin-wall part, increasing heat treatment stress release and the like, machining deformation of the thin-wall part ring and assembly stability of the thin-wall part ring, a shaft and a pin are effectively controlled, machining precision and assembly efficiency are improved, and the service life of a product is prolonged; therefore, the working efficiency and reliability of the gas turbine are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical processing, and in particular to a processing method for a compressor drive ring. Background Art

[0002] The drive ring is one of the core components of the imported adjustable guide vane actuator in the gas turbine compressor. The actuator is mainly used to adjust the rotation angle of the adjustable guide vanes in a coordinated manner to optimize the intake flow, expand the surge margin of the compressor, avoid unstable operating conditions caused by airflow separation, reduce power consumption, and at the same time improve the dynamic response speed and adapt to sudden load changes.

[0003] The drive ring is assembled from three workpieces: a ring, a shaft, and a pin. The ring is a thin-walled part of titanium alloy. When processing the ring, the cutting heat generated during the processing can easily cause thermal deformation of the ring, thereby affecting the dimensional accuracy. Repeated clamping is required, and the position error rate of the key mating surface is relatively high.

[0004] In summary, when processing existing rings, there are problems such as cutting heat easily causing thermal deformation of the rings, thereby affecting dimensional accuracy, and repeated clamping leading to a high position error rate of key mating surfaces. Summary of the Invention

[0005] The present invention aims to address existing problems in ring machining, such as thermal deformation caused by cutting heat, which affects dimensional accuracy, and high positional errors on key mating surfaces caused by repeated clamping. Furthermore, a method for machining a compressor drive ring is provided.

[0006] The technical solution of the present invention is: a method for processing a compressor drive ring, comprising the following steps:

[0007] Step 1: First clamp the blank on the fixture, and then fix the fixture on the lathe processing position;

[0008] Step 2: Rough turning of inner holes, grooves and outer circles;

[0009] Step 3: Move the fixture and workpiece from the lathe processing position to the milling machine processing position;

[0010] Step 4: Rough milling of boss;

[0011] Step 5: Remove the workpiece from the milling machine processing position and perform stress relief annealing;

[0012] Step 6: First, place a filler block between two adjacent bosses on the workpiece, and then fix the fixture and workpiece together on the lathe processing position;

[0013] Step 7: Finish turning the inner hole, outer circle and end face;

[0014] Step 8: Move the fixture and workpiece from the lathe processing position to the milling machine processing position;

[0015] Step 9: Fine mill the boss and the mounting holes on the boss, then assemble the shaft into the mounting holes;

[0016] Step 10: Fine mill the side walls of the groove and the limiting holes on the boss, and then assemble the pins in the limiting holes;

[0017] Step 11: Use pliers to remove burrs and make markings.

[0018] Furthermore, in the step 1, the blank is clamped on the fixture using a thin pressing plate and a hexagon socket head screw, and then the blank is aligned to ensure the initial positioning accuracy of the blank.

[0019] Furthermore, when rough milling the boss in step 4, the upper end face and outer circle runout of the workpiece boss are accurately aligned to ≤0.05mm, and the end face runout of the fixture is verified to be ≤0.05mm, ensuring the assembly accuracy of the fixture and the workpiece, and providing a reliable benchmark for subsequent milling processing.

[0020] Furthermore, the following step is provided after step four: removing the hexagon socket head screws one by one and applying copper-based grease, and screwing them back immediately after application to prevent the hexagon socket head screws from rusting and facilitate subsequent disassembly and assembly.

[0021] Furthermore, in step five, the workpiece and the fixture are removed simultaneously, and the workpiece and the fixture are not disassembled, and the workpiece and the fixture are heat treated together.

[0022] Furthermore, during the precision turning in step seven, first place the workpiece W surface downward on the equal height shim, stuff the feeler gauge in the free state, use the chuck to lightly clamp the workpiece Q surface, and fix it with hexagon socket head screws and thin pressure plates to ensure the stability and positioning accuracy of the workpiece during processing, accurately align the B surface runout ≤0.3mm, the Q surface point runout ≤0.02mm, and the circumferential runout ≤0.3mm, and then turn each inner hole, outer circle and end face according to the drawing requirements, among which the A surface is theoretically measured 0.5mm, and the F and H surfaces can be seen to the light at the minimum amount, which serves as the reference for the next alignment. At the same time, the step surface on the fixture that cooperates with the workpiece can be seen to the light at the minimum amount, and when turning the two sides of the fixture, the stop depth is strictly controlled to 5±0.1mm to ensure the matching accuracy of the fixture and the workpiece.

[0023] Furthermore, step seven is followed by the following steps: placing the boss surface of the fixture upward on the shim of equal height, clamping the outer circle of the fixture with a chuck, accurately aligning the end face runout of the fixture and the workpiece ≤0.02mm, matching the stop depth of the fixture according to the 3±0.15mm boss on the F surface of the workpiece, ensuring that when the F surface and the fixture are in contact with each other in the free state, the gap between the M surface and the fixture is between 0mm-0.02mm, placing the M surface of the workpiece downward on the shim of equal height, verifying in the free state whether a 0.02mm feeler gauge can be inserted between the M surface of the workpiece and the contact surface of the fixture, pressing the A surface from the outer circle, and verifying with a gauge during the pressing process that the Q surface runout is ≤0.02mm, and aligning the S surface runout ≤0.03mm, ensuring the stability and positioning accuracy of the workpiece during the processing, accurately turning the lower half of the workpiece to the standard size, and the minimum amount of the H surface is visible to the light, and the amount is ≤0.3mm.

[0024] Furthermore, the following steps are provided: removing the workpiece from the fixture, turning the fixture over, and then re-clamping the workpiece on the fixture, measuring the depth of the stop on both sides of the fixture, clamping the outer circle of the fixture with a chuck, aligning the end face runout of the stop on the fixture to ≤0.02mm, turning the workpiece over and placing it in the stop on the fixture, verifying whether a 0.02mm feeler gauge can be inserted in a free state, pressing the Q surface from the inner hole, grinding the filling block according to the height of the K groove in the inner hole of the workpiece, there is a gap between the upper end face and the workpiece after assembling the filling block, and the gap cannot be inserted with a 0.02mm feeler gauge, ensuring the stability and positioning accuracy of the workpiece during processing, accurately aligning the M and Z surfaces of the workpiece to ≤0.02mm, and calibrating the remaining dimensions according to the drawing. During processing, loosen the pressure plate after a single-side allowance of 0.5mm to release the processing stress, and re-align the processing to ensure the stability of the workpiece during processing and the final processing accuracy.

[0025] Furthermore, when fine-milling the boss in step nine, the workpiece is transferred in with the fixture to verify whether the filling block interferes with the mounting hole to be processed in this process. If so, the position of the filling block is adjusted in time, and then the fixture plate is placed on the equal-height shim, and the pressure plate presses the end face of the fixture plate to accurately align the H and W surface runout of the workpiece ≤0.02mm to ensure the stability and positioning accuracy of the workpiece during the processing.

[0026] When fine-milling the side wall of the groove in the tenth step, remove the pressure plate, flip the fixture plate and place it on the shim of the same height, press the fixture with the pressure plate, accurately match the step height of the fixture to ensure the matching accuracy between the fixture and the workpiece, turn the workpiece over and place it on the fixture, verify that the W surface of the part fits the fixture in a free state, and that a 0.02mm feeler gauge cannot be inserted between the M surface of the workpiece and the fixture. Press the Q surface with the pressure plate and adjust the position of the filling block to improve the stability of the workpiece during processing, accurately align the H surface of the workpiece to ≤0.02mm, and mill the remaining dimensions according to the drawing to ensure that the dimensional accuracy and form and position tolerances of each part of the workpiece meet the requirements of the drawing.

[0027] Compared with the prior art, the present invention has the following effects:

[0028] 1. The processing method of the compressor drive ring provided by the present invention effectively controls the processing deformation of the thin-walled ring and the assembly stability with the shaft and pin by rationally arranging the processing method and assembly process, designing a filler block to control the deformation of the thin-walled part, and increasing the stress release during heat treatment. This improves the processing accuracy, assembly efficiency and product life, thereby effectively improving the working efficiency and reliability of the gas turbine.

[0029] 2. The processing method of the compressor drive ring provided by the present invention, with the help of a sequenced collaborative processing system, a combined positioning system and a stress control fixture system, effectively solves the problem of deformation during processing of thin-walled parts, reduces the position deviation rate of key mating surfaces, improves dimensional stability, and meets the high-precision processing requirements of the drive ring.

[0030] 3. The processing method of the compressor drive ring provided by the present invention optimizes the assembly process, reduces the number of repeated clamping times in the process, reduces the accumulation of reference conversion errors, and the application of the hot-cold composite assembly process makes the assembly of the shaft and the ring hole more accurate and efficient, thereby improving the overall assembly efficiency.

[0031] 4. The processing method of the compressor drive ring provided by the present invention suppresses the delayed deformation caused by stress release after processing through dynamic coupling between the fixture and the workpiece, thereby enhancing the reliability of the entire processing and assembly process and reducing the scrap rate and rework rate in the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic structural diagram of a workpiece of the present invention;

[0033] Figure 2 yes Figure 1 Schematic diagram of the workpiece when it is clamped on the fixture;

[0034] Figure 3 It is a structural schematic diagram of the filling block of the present invention;

[0035] Figure 4 It is a top view of the workpiece when the boss is rough-milled according to the present invention;

[0036] Figure 5 yes Figure 4 Cross-sectional view at the middle BB;

[0037] Figure 6 This is a front view of a workpiece during precision turning of the inner hole, outer circle and end face of the present invention;

[0038] Figure 7 yes Figure 6 Magnified view of the middle X area;

[0039] Figure 8It is a partial schematic diagram of a workpiece during the precision milling of holes and bosses according to the present invention.

[0040] In the figure: 1, inner hole; 2, groove; 3, outer circle; 4, boss; 5, shaft; 6, pin. DETAILED DESCRIPTION

[0041] Specific implementation method 1: Combination Figures 1 to 8 To illustrate this embodiment, the embodiment includes the following steps: Step 1: first clamping the blank on the fixture, and then fixing the fixture on the lathe processing position;

[0042] Step 2: Rough turning the inner hole 1, groove 2 and outer circle 3;

[0043] Step 3: Move the fixture and workpiece from the lathe processing position to the milling machine processing position;

[0044] Step 4: Rough milling of boss 4;

[0045] Step 5: Remove the workpiece from the milling machine processing position and perform stress relief annealing;

[0046] Step 6: First, place a filler block between two adjacent bosses 4 on the workpiece, and then fix the fixture and the workpiece together on the lathe processing position;

[0047] Step 7: Finish turning the inner hole 1, outer circle 3 and end face;

[0048] Step 8: Move the fixture and workpiece from the lathe processing position to the milling machine processing position;

[0049] Step 9: Fine mill the boss 4 and the mounting hole on the boss 4, and then assemble the shaft 5 into the mounting hole;

[0050] Step 10: Fine milling the side walls of the groove 2 and the limiting holes on the boss 4, and then assembling the pin 6 in the limiting holes;

[0051] Step 11: Use pliers to remove burrs and make markings.

[0052] The processing method of the compressor drive ring of this embodiment effectively controls the processing deformation of the thin-walled ring and the assembly stability with the shaft 5 and the pin 6 by reasonably arranging the processing method and assembly process flow, designing a filling block to control the deformation of the thin-walled part, and increasing the stress release during heat treatment, thereby improving the processing accuracy, assembly efficiency and product life, thereby effectively improving the working efficiency and reliability of the gas turbine.

[0053] Specific implementation method 2: Combination Figure 1 、 Figure 2This embodiment is described. The difference between this embodiment and the first embodiment is that in step 1, a thin pressure plate and a hexagon socket head screw are used to clamp the blank on the fixture, and then the blank is aligned to ensure the initial positioning accuracy of the blank. The fixture can be used at the top or bottom of the workpiece. Figure 2 Schematics of both states are provided. The fixture utilizes a non-uniformly distributed thin pressure plate layout, applying a 1.2 MPa clamping force in the rigid area and a 0.8 MPa gradient pressure in the flexible area. This fixture can control deformation of thin-walled ring parts and improve machining accuracy. Other components and connections are identical to those in Specific Embodiment 1.

[0054] Specific implementation method three: Combination Figure 1 、 Figure 4 This embodiment differs from the first embodiment in that, during rough milling of the boss 4 in step 4, the runout between the upper end face of the boss 4 and the outer diameter 3 of the workpiece is precisely aligned to a value of ≤0.05mm. Simultaneously, the runout of the fixture end face is verified to be ≤0.05mm. This ensures the assembly accuracy of the fixture and workpiece, providing a reliable reference for subsequent milling. Other components and connections are the same as those in the second embodiment.

[0055] Specific implementation method four: Combination Figure 1 、 Figure 4 This embodiment differs from Specific Embodiment 3 in that after step 4, the following step is added: The hexagon socket head screws are removed one by one and coated with copper-based grease. After application, they are immediately screwed back in to prevent rust and facilitate subsequent disassembly and assembly. The remaining components and connections are the same as those in Specific Embodiment 3.

[0056] Specific implementation method five: Combination Figure 1 This embodiment differs from the first embodiment in that, in step five, the workpiece and fixture are removed simultaneously. The workpiece and fixture remain unassembled, and heat treatment is performed together. Stress relief annealing is performed on the rough-machined workpiece. By strictly controlling the annealing process parameters, residual stresses generated during machining are effectively eliminated. This step prevents deformation of the workpiece during subsequent machining and use, which could affect dimensional accuracy and performance, ensuring dimensional stability and machining accuracy. Other components and connections are the same as those in the third embodiment.

[0057] Specific implementation method six: combination Figure 6 、 Figure 7This embodiment is described. The difference between this embodiment and the first embodiment is that during the precision turning in step seven, the workpiece W surface is first placed downward on a shim of equal height. The feeler gauge is inserted in the free state. The Q surface of the workpiece is lightly clamped with a chuck and fixed with a hexagon socket head screw and a thin pressure plate to ensure the stability and positioning accuracy of the workpiece during processing. The B surface runout is accurately aligned to ≤0.3mm, the Q surface point runout is ≤0.02mm, and the circumferential runout is ≤0.3mm. Then, each inner hole 1, outer circle 3 and end face are turned according to the requirements of the drawing. The theoretical amount of the A surface is 0.5mm, and the minimum amount of the F and H surfaces is visible, which serves as the alignment reference for the next sequence. At the same time, the step surface on the fixture that matches the workpiece is visible, and when turning the two sides of the fixture, the stop depth is strictly controlled to 5±0.1mm to ensure the matching accuracy between the fixture and the workpiece. The other components and connection relationships are the same as those of the first embodiment.

[0058] Specific implementation method seven: combination Figure 6 、 Figure 7 This embodiment differs from the sixth embodiment in that the following steps are included after step seven: the fixture boss 4 is placed face-up on a shim of equal height, the fixture outer diameter 3 is clamped with a chuck, and the end face runout between the fixture and the workpiece is precisely aligned to ≤0.02mm. The fixture stop depth is adjusted based on the 3±0.15mm boss 4 on the workpiece F surface, ensuring that when the F surface and the fixture are in contact in the free state, the gap between the M surface and the fixture is between 0mm and 0.02mm. The workpiece M surface is placed face-down on the shim of equal height. In the free state, a 0.02mm feeler gauge can be inserted between the workpiece M surface and the fixture contact surface. The pressure plate presses the A surface from the outer diameter 3. During the pressure process, a gauge is used to verify that the Q surface runout is ≤0.02mm. Simultaneously, the S surface runout is aligned to ≤0.03mm, ensuring the stability and positioning accuracy of the workpiece during machining. The lower half of the workpiece is precisely turned to the standard size, with the H surface showing the minimum amount of light and a clearance of ≤0.3mm. The other components and connection relationships are the same as those of the sixth embodiment.

[0059] Specific implementation method eight: combination Figure 6 、 Figure 7This embodiment is described. It differs from the seventh embodiment in that it further includes the following steps: removing the workpiece from the fixture, flipping the fixture, and re-clamping the workpiece on the fixture. The depth of the stop on both sides of the fixture is measured. The outer diameter 3 of the fixture is clamped with a chuck. The end face runout of the stop on the fixture is aligned to ≤0.02mm. The workpiece is flipped over and placed in the stop on the fixture. Verifying whether a 0.02mm feeler gauge can be inserted in a free state is performed. The pressure plate presses the Q surface from the inner hole 1. A filler block is ground according to the height of the K groove in the inner hole 1 of the workpiece. After assembling the filler block, there is a gap between the upper end face and the workpiece, and the gap cannot accommodate a 0.02mm feeler gauge. This ensures the stability and positioning accuracy of the workpiece during machining. The runout of the M and Z surfaces of the workpiece is accurately aligned to ≤0.02mm. The remaining dimensions are aligned according to the drawing. During machining, after a single-side allowance of 0.5mm is allowed, the pressure plate is released to release machining stress, and the machining is re-aligned to ensure the stability of the workpiece during machining and the final machining accuracy. Other components and connection relationships are the same as those of the seventh embodiment.

[0060] Specific implementation method nine: combination Figure 8 This embodiment describes this method. It differs from the first embodiment in that, during the fine milling of boss 4 in step nine, the workpiece is brought in with a fixture. Verification is performed to determine whether the filler block interferes with the mounting hole to be machined in this process. If so, the filler block's position is adjusted promptly. The fixture plate is then placed on a shim of equal height. A pressure plate is used to press the end faces of the fixture plate, precisely aligning the H and W surfaces of the workpiece to a runout of ≤0.02mm. This ensures the stability and positioning accuracy of the workpiece during machining. During assembly, the workpiece is brought in with the fixture, and assembly is performed without removing the fixture. The filler block's position is adjusted, and shaft 5 is selected based on the actual dimensions of the ring. Liquid nitrogen is used to cool shaft 5, and a heat gun is used to heat the corresponding mounting holes on the ring before assembly. Other components and connections are the same as those in the first embodiment.

[0061] Specific implementation method ten: Combination Figure 8 This embodiment is described. The difference between this embodiment and the first embodiment is that when fine-milling the side wall of the groove 2 in step 10, the pressure plate is removed, the fixture plate is flipped over and placed on the shim of the same height, the pressure plate presses the fixture, and the step height of the fixture is precisely milled to ensure the matching accuracy between the fixture and the workpiece. The workpiece is turned over and placed on the fixture. The W surface of the part is verified to fit the fixture in a free state. A 0.02mm feeler gauge cannot be inserted between the M surface of the workpiece and the fixture. The pressure plate presses the Q surface, and the position of the filler block is adjusted to improve the stability of the workpiece during processing. The H surface of the workpiece is accurately aligned to a runout of ≤0.02mm. The remaining dimensions are milled according to the drawing to ensure that the dimensional accuracy and form and position tolerances of various parts of the workpiece meet the requirements of the drawing. During assembly, the workpiece continues to flow with the fixture, the position of the pressure plate is adjusted one by one, the fixture is placed on the shim of the same height, the pressure plate presses the end face of the fixture, and after aligning the Q and H surfaces of the workpiece to a runout of ≤0.02mm, the corresponding limit holes are drilled and reamed using a milling machine. The other components and connection relationships are the same as those of the first embodiment.

[0062] The content of the present invention is not limited to the content of the above-mentioned embodiments. The combination of one or more specific embodiments can also achieve the purpose of the invention.

Claims

1. A method for processing a compressor drive ring, characterized in that: The following steps are involved: Step 1: First clamp the blank on the fixture, and then fix the fixture on the lathe processing position; Step 2: Rough turning the inner hole (1), groove (2) and outer circle (3); Step 3: Move the fixture and workpiece from the lathe processing position to the milling machine processing position; Step 4: rough milling the boss (4); Step 5: Remove the workpiece from the milling machine processing position and perform stress relief annealing; Step 6: First, place a filler block between two adjacent bosses (4) on the workpiece, and then fix the fixture and the workpiece together on the lathe processing position; Step 7: Finish turning the inner hole (1), outer circle (3) and end face; Step 8: Move the fixture and workpiece from the lathe processing position to the milling machine processing position; Step 9: Fine milling the boss (4) and the mounting hole on the boss (4), and then assembling the shaft (5) in the mounting hole; Step 10: Fine milling the side walls of the groove (2) and the limiting holes on the boss (4), and then assembling the pin (6) in the limiting holes; Step 11: Use pliers to remove burrs and make markings.

2. The method for processing a compressor drive ring according to claim 1, characterized in that: In the step 1, the blank is clamped on the fixture using a thin pressing plate and a hexagon socket head screw, and then the blank is aligned to ensure the initial positioning accuracy of the blank.

3. The method for processing a compressor drive ring according to claim 1, characterized in that: When the boss (4) is roughly milled in step 4, the upper end face of the boss (4) of the workpiece and the outer circle (3) are accurately aligned to have a runout of ≤0.05mm, and the end face runout of the fixture is verified to be ≤0.05mm, thereby ensuring the assembly accuracy of the fixture and the workpiece and providing a reliable benchmark for subsequent milling processing.

4. The method for processing a compressor drive ring according to claim 3, characterized in that: After step four, the following steps are provided: removing the hexagon socket head screws one by one and applying copper-based grease, and screwing them back immediately after application to prevent the hexagon socket head screws from rusting and facilitate subsequent disassembly and assembly.

5. The method for processing a compressor drive ring according to claim 1, characterized in that: In the step 5, the workpiece and the fixture are removed at the same time, and the workpiece and the fixture are not disassembled, and the workpiece and the fixture are heat treated together.

6. The method for processing a compressor drive ring according to claim 1, characterized in that: During the precision turning in step seven, first place the workpiece W face downward on the equal height shim, stuff the feeler gauge in the free state, use the chuck to lightly clamp the workpiece Q face, and use the hexagon socket head screw and thin pressure plate to fix it, to ensure the stability and positioning accuracy of the workpiece during the processing, accurately align the B face runout ≤0.3mm, the Q face point runout ≤0.02mm, the circumferential runout ≤0.3mm, and then turn each inner hole (1), outer circle (3) and end face according to the drawing requirements, among which the A face is theoretically measured 0.5mm, and the F face and H face can be seen to the light at the minimum, which serves as the alignment reference for the next sequence. At the same time, the step surface on the fixture that matches the workpiece can be seen to the light at the minimum, and when turning the two faces of the fixture, the stop depth is strictly controlled to be 5±0.1mm to ensure the matching accuracy between the fixture and the workpiece.

7. The method for processing a compressor drive ring according to claim 6, characterized in that: The step seven is followed by the following steps: placing the fixture boss (4) face upward on the equal height shim, chuck the fixture outer circle (3), accurately align the fixture and the workpiece end face runout ≤0.02mm, match the fixture stop depth according to the 3±0.15mm boss (4) on the workpiece F face, ensure that when the F face and the fixture are fitted in the free state, the gap between the M face and the fixture is between 0mm-0.02mm, place the workpiece M face downward on the equal height shim, verify in the free state whether a 0.02mm feeler gauge can be inserted between the workpiece M face and the fixture fitting surface, press the A face from the outer circle (3), verify the Q face runout ≤0.02mm with a gauge during the pressing process, and align the S face runout ≤0.03mm, ensure the stability and positioning accuracy of the workpiece during the processing, accurately turn the lower half of the workpiece to the standard size, and the minimum amount of H face is visible to the light, and the amount is ≤0.3mm.

8. The method for processing a compressor drive ring according to claim 7, characterized in that: The following steps are also provided: removing the workpiece from the fixture, turning over the fixture, and then re-clamping the workpiece on the fixture, measuring the depth of the stop on both sides of the fixture, chuck clamping the outer circle of the fixture (3), aligning the stop end face runout of the fixture ≤0.02mm, turning the workpiece over and placing it in the stop on the fixture, verifying whether a 0.02mm feeler gauge can be inserted in a free state, pressing the Q surface from the inner hole (1), grinding the filling block according to the height of the K groove of the inner hole (1) of the workpiece, there is a gap between the upper end face and the workpiece after assembling the filling block, and the gap cannot be inserted with a 0.02mm feeler gauge, ensuring the stability and positioning accuracy of the workpiece during the processing process, accurately aligning the M and Z surfaces of the workpiece to a runout of ≤0.02mm, and calibrating the remaining dimensions according to the drawing. During the processing, after a single-side allowance of 0.5mm, the pressure plate is loosened to release the processing stress, and the processing is re-aligned to ensure the stability of the workpiece during the processing process and the final processing accuracy.

9. The method for processing a compressor drive ring according to claim 1, characterized in that: When the boss (4) is finely milled in step nine, the workpiece is brought in with the fixture to verify whether the filling block interferes with the mounting hole to be processed in this process. If so, the position of the filling block is adjusted in time. Then the fixture plate is placed on the equal-height pad iron, and the pressure plate presses the end face of the fixture plate to accurately align the H and W surface runout of the workpiece ≤0.02mm to ensure the stability and positioning accuracy of the workpiece during the processing.

10. The method for processing a compressor drive ring according to claim 1, characterized in that: When the side wall of the groove (2) is finely milled in the step 10, the pressure plate is removed, the fixture plate is turned over and placed on the equal height pad, the pressure plate presses the fixture, and the step height of the fixture is accurately milled to ensure the matching accuracy between the fixture and the workpiece. The workpiece is turned over and placed on the fixture. In the free state, it is verified that the W surface of the part fits the fixture. A 0.02mm feeler gauge cannot be inserted between the M surface of the workpiece and the fixture. The pressure plate presses the Q surface and adjusts the position of the filling block to improve the stability of the workpiece during the processing. The runout of the H surface of the workpiece is accurately aligned to ≤0.02mm. The remaining dimensions are milled according to the drawing to ensure that the dimensional accuracy and form and position tolerances of various parts of the workpiece meet the requirements of the drawing.

Images