CN117300741A - Method for electrolytic rough cutting, array polishing and polishing strengthening of blisk - Google Patents
Method for electrolytic rough cutting, array polishing and polishing strengthening of blisk Download PDFInfo
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- CN117300741A CN117300741A CN202311250671.9A CN202311250671A CN117300741A CN 117300741 A CN117300741 A CN 117300741A CN 202311250671 A CN202311250671 A CN 202311250671A CN 117300741 A CN117300741 A CN 117300741A
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- 238000005498 polishing Methods 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000005728 strengthening Methods 0.000 title claims abstract description 19
- 238000005520 cutting process Methods 0.000 title claims description 9
- 238000000227 grinding Methods 0.000 claims abstract description 106
- 238000012545 processing Methods 0.000 claims abstract description 56
- 230000002093 peripheral effect Effects 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 11
- 238000003754 machining Methods 0.000 claims description 9
- 238000005299 abrasion Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000003082 abrasive agent Substances 0.000 claims description 2
- 229910003460 diamond Inorganic materials 0.000 claims description 2
- 239000010432 diamond Substances 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims description 2
- 238000005065 mining Methods 0.000 claims description 2
- 238000005192 partition Methods 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 claims description 2
- 238000005070 sampling Methods 0.000 claims description 2
- 238000000638 solvent extraction Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 4
- 238000003672 processing method Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000003801 milling Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/04—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass for both machining and other metal-working operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
- B24B29/02—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/06—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving oscillating or vibrating containers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/20—Drives or gearings; Equipment therefor relating to feed movement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/006—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the speed
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
A method for electrolytic rough opening, array polishing and polishing strengthening of a blisk comprises the following steps: carrying out electrolytic rough opening processing on the blisk; the dimension control method of the superhard grinding wheel comprises the following steps: during array grinding, selecting proper superhard grinding wheel sizes and grinding parameters according to different subareas; the blade body grinding track can be performed in a spiral peripheral grinding or longitudinal grinding mode, so that the removal amount is ensured to be uniform; when the array is polished, selecting a proper polishing tool according to different subareas; when the array is polished, proper array polishing parameters are adopted; when the array is polished, the surface of the air inlet and outlet edges can be longitudinally polished along the direction of the air inlet and outlet edges; the vibration finishing equipment is an island-free vibration finishing machine. The invention has the advantages that: the processing cost and the processing time during the mass production of the blisk are reduced, the processing quality of blisk parts is ensured, the dimensional accuracy, the position accuracy and the circular arc shape accuracy of the air inlet and outlet sides of the blisk parts meet the design requirements, and the blisk processing method is a high-quality, high-efficiency and low-cost blisk processing method.
Description
Technical Field
The invention relates to the technical field of aeroengines, in particular to a method for electrolytic rough opening, array polishing and finishing strengthening of a blisk.
Background
The size, the position accuracy and the surface quality of the blisk serving as a heavy part of the advanced aero-engine directly influence the service performance and the service life of the aero-engine. The high-temperature alloy compressor blisk is complex in structure, the blades are curved, in a single cantilever state, the blades are mutually shielded, the blade body is thin and uneven, the flow passage is deep and narrow, the requirements on geometric precision and surface quality are high, the material hardness is high, and the processing difficulty is extremely high.
At present, numerical control milling is mainly adopted for machining the integral vane disk of the aero-engine in China. The high-temperature alloy has the advantages of large removal amount during numerical control milling, quick cutter abrasion, high processing cost and weaker rigidity of the whole blade body of the blisk, so that the deviation between the dimension and the theoretical processing dimension in actual processing is larger, the shape of the air inlet and outlet edges is disqualified, in addition, the cutter mark is obvious after numerical control milling, and polishing and vibration finishing removal are needed.
In recent years, linear friction welding is also gradually applied to blisk processing, and the linear friction welding has high thermoplastic requirements on metal materials, is not suitable for processing parts made of nickel-based materials, iron-based materials and the like, and is mainly suitable for manufacturing titanium alloy blisks of fans.
Compared with milling, linear friction welding and other technologies, the precise electrolytic blisk has certain advantages, no tool loss, low processing cost, no contact between tools and workpieces, no vibration, deformation, residual stress and other problems, but the precise electrolytic blisk processing technology in China is still immature and is not applied in a large area.
Disclosure of Invention
The existing high-temperature alloy blisk processing technology is characterized in that the size and position accuracy are controlled through numerical control milling, and the surface milling tool marks and roughness are improved through polishing and vibration finishing. Aiming at the current situations that the milling cutter of the blisk has higher cost, lower processing efficiency and easily out-of-tolerance actual processing size and difficult guarantee of the shape of the air inlet and outlet edges, the invention provides a blisk electrolysis rough opening, array grinding and polishing and finishing strengthening method, which can finally realize the preparation of the blisk with high dimensional precision, high position precision and high arc shape precision of the air inlet and outlet edges.
The invention provides a method for electrolytic rough opening, array polishing and finishing strengthening of a blisk, which is characterized by comprising the following steps of: the method comprises the following steps:
1) Carrying out electrolytic rough opening processing on the blisk;
2) The dimension control method of the superhard grinding wheel comprises the following steps:
3) During array grinding, selecting proper superhard grinding wheel sizes and grinding parameters according to different subareas;
4) When the array is ground, the blade body grinding track can be performed in a spiral peripheral grinding or longitudinal grinding mode, so that the removal amount is ensured to be uniform;
5) When the array is polished, selecting a proper polishing tool according to different subareas;
6) When the array is polished, proper array polishing parameters are adopted;
7) When the array is polished, the surface of the air inlet and outlet edges can be longitudinally polished along the direction of the air inlet and outlet edges;
8) The vibration finishing equipment is an island-free vibration finishing machine;
9) The new abrasive is pretreated before use, and is used after vibrating in a polishing machine for 3 hours.
The electrolytic rough opening processing of the blisk is specifically as follows:
the electrolytic rough mining is carried out by combining a trepanning cathode and a profiling split cathode, a blisk blank is arranged on an electrolytic machine tool workbench, electrolytic parameters are set, firstly, the trepanning cathode is adopted for blank electrolytic rough slotting, then, the profiling split cathode is adopted for electrolytic shaping processing of a blisk blade body of the rough slotting, the blisk allowance is controlled within 0.3-0.5mm after electrolytic shaping, and then, a three-coordinate measuring machine is adopted for detecting the blisk;
then, according to the structural characteristics of the blisk and the blade ring parts, reasonably partitioning the blisk, dividing a blisk processing model into three areas, namely a runner area, a blade root area and a blade body area, generating a numerical control program by using UG software, optimizing the processing program according to the processed part measurement result, clamping the parts on an array grinding and polishing machine tool, and respectively carrying out array rough grinding and fine grinding processing on the runner area, the blade root area and the blade body area by selecting proper superhard grinding wheels; in the processing process, the dimension of the superhard grinding wheel is strictly controlled, so that the processing precision and consistency of the blisk blade of the array grinding are ensured;
dividing the blisk processing model into seven areas, namely a runner area, a blade basin blade root, a blade back blade root, a blade basin area, a blade back area, an air inlet edge area and an air outlet edge area, generating a numerical control polishing program by using UG software, and carrying out blisk partition rough and fine polishing processing on an array polishing machine tool by using corresponding polishing tools and polishing parameters;
performing finishing and strengthening integrated processing; stainless steel disc-shaped abrasive materials are put into the vibration polishing equipment, and the polishing liquid is sprayed to carry out vibration polishing and strengthening integrated processing, so that the vibration time is prolonged: the front surface is 1-2h, and the back surface is 1-2h; the vibration frequency is 50HZ; grinding fluid spraying time: the front side is 10min, and the back side is 10min; the finishing enhancement parameters can also be determined experimentally.
The dimension control method of the superhard grinding wheel comprises the following steps: firstly, carrying out uniform grinding on the outer diameter of a superhard grinding wheel, and adopting a common grinding machine to drive a large-diameter diamond repairing device to grind the outer diameter of a small-diameter superhard grinding wheel, wherein the grinding amount is 0.01-0.03mm; the round trip deviation of the trimmed grinding wheel is within 0.02mm;
measuring the maximum outer diameter of the superhard grinding wheel in the rotation process by adopting non-contact point laser, analyzing the detection result, and keeping the grinding wheel with the maximum outer diameter deviation within 0.03mm for array grinding and polishing;
in the initial stage of machining, carrying out on-line detection on the superhard grinding wheel once for 7 blisk blades to be machined, measuring the maximum outer diameter of the grinding wheel, compensating the grinding and polishing machining program according to the abrasion loss, and continuously machining the next blisk blade; through detection for several times, the abrasion rule of the ultra-hard grinding wheel can be searched out, the compensation parameters are solidified, then the grinding wheel is detected without processing 7 blisk blades, and the sampling inspection can be performed after a certain batch is processed.
When the array is ground, proper superhard grinding wheel sizes and grinding parameters are selected according to different subareas; wherein the rotation speed of the main shaft is 20000-30000r/min, the feeding speed is 500-1000mm/min and the cutting depth is 0.05-0.1mm during the rough grinding of the array grinding; the machining parameters used in the fine grinding are that the spindle rotation speed is 20000-30000r/min, the feeding speed is 500-1000mm/min, and the cutting depth is 0.01-0.05mm; the blade body grinding track can be performed by adopting a spiral peripheral grinding or longitudinal grinding mode, but the removal amount is uniform.
The array is polished, and proper polishing tools are selected according to different subareas; using a rubber-based flexible polishing wheel; the polishing wheel base body is elastic rubber, the outer layer is an abrasive layer, and the polishing wheel has certain flexibility and can realize self-adaptive processing during polishing; the polishing wheel 400# -800# is used in rough polishing, and the polishing wheel 1500# -2000# is used in fine polishing;
array polishing, adopting proper array polishing parameters; setting the rotating speed of the main shaft at 4000-6000r/min, the feeding speed at 1000-3000mm/min and the pre-pressing amount at 0.1-0.3mm during rough polishing; the spindle rotating speed can be set to 4000-6000r/min during finish polishing, the feeding speed is 800-2000mm/min, and the pre-pressing amount is 0.1-0.3mm; when the array is polished, longitudinal polishing is performed along the direction of the air inlet and outlet sides in order to ensure the surface of the air inlet and outlet sides.
The vibration finishing equipment is an island-free vibration finishing machine, the pretreatment is carried out before the new abrasive is used, and the vibration finishing machine vibrates for 3 hours.
Compared with the prior art, the invention has the advantages that:
the method for electrolytic rough cutting, array polishing and finishing strengthening of the blisk obviously reduces the processing cost during the batch production of the blisk, reduces the overall processing time of the blisk, ensures the processing quality of blisk parts, and ensures that the dimensional accuracy, the position accuracy and the circular arc shape accuracy of the air inlet and outlet sides of the blisk meet the design requirements. Is a novel high-quality, high-efficiency and low-cost processing method for the blisk. The invention has wide market demand and application prospect in improving the surface quality of the parts with the blisk structure of the gas turbine.
Drawings
The invention will be described in further detail with reference to the accompanying drawings and embodiments:
FIG. 1 schematic diagram of a blisk after rough slotting
FIG. 2 leaf back schematic view of leaf disk
FIG. 3 leaf disk leaf basin schematic diagram
FIG. 4 leaf disk three-coordinate detection results
FIG. 5 blade root residual force test results.
Detailed Description
The present invention will be further explained with reference to specific embodiments, but the structure, proportion and size shown in the drawings are not limited to the invention, and are only used for the understanding and reading of the disclosure, but are not intended to limit the limitation of the invention, so that any modification of structure, change of proportion or adjustment of size does not have any technical significance, and all fall within the scope of the disclosure without affecting the efficacy and achievement of the present invention.
And (3) mounting the 7-level blisk blank on an electrolytic machine tool workbench, setting electrolytic parameters, and carrying out blank electrolytic rough grooving by adopting a trepanning cathode. And then carrying out electrolytic shaping processing on the rough slotted blisk blade body by adopting a profiling split cathode, then detecting the blisk by adopting a three-coordinate measuring machine, wherein the detected blisk allowance is within 0.3-0.5mm, and the subsequent processing can be carried out, and the electrolytic rough slotting is shown in figure 1.
Then, dividing the blisk machining model into three areas, namely a runner area, a blade root area and a blade body area, generating a numerical control program by using UG software, and optimizing the machining program. Clamping parts on an array grinding and polishing machine tool, setting the rotating speed of a main shaft at 30000r/min, the feeding speed at 1000mm/min and the cutting depth at 0.1mm; and (3) carrying out array rough grinding on the flow passage area and the blade body area by using an ultra-hard grinding wheel with r=1.5 mm, d=20.0 mm and the granularity number of 200 #. And (3) carrying out array rough grinding on the blade root area by using an ultra-hard grinding wheel with r=1.5 mm and D=12.0 mm, wherein the granularity number of the grinding wheel is 200 #. And 8 blades are processed each time, when 56 blades are processed (7 blades are roughly ground by each superhard grinding wheel), one-time online detection is carried out on all superhard grinding wheels, the abrasion loss is measured to be 0.007mm, and the processing procedure is compensated according to the abrasion loss until the whole impeller rough grinding is finished.
Then, array fine grinding processing is performed. Setting the rotating speed of a main shaft at 30000r/min, the feeding speed at 1000mm/min and the cutting depth at 0.02mm; selecting r=1.5 mm, d=20.0 mm and the pretreated superhard grinding wheel with the granularity number of 300# for carrying out array fine grinding processing on the flow area and the blade body area; and selecting a pre-treated superhard grinding wheel with r=1.5mm, d=12.0mm and 300# granularity number for carrying out array fine grinding processing on the blade root area. And 8 blades are processed each time, when 56 blades are processed (each superhard grinding wheel finishes 7 blade fine grinding), all grinding wheels are subjected to one-time online detection, and the processing program is compensated according to the abrasion loss until the whole blade disc fine grinding is finished.
And then, performing array rough polishing. The blisk machining model is divided into seven areas, namely a runner area, a blade basin blade root, a blade back blade root, a blade basin area, a blade back area, an air inlet edge area and an air outlet edge area, as shown in fig. 2 and 3. Generating a numerical control polishing program by using UG software, setting the rotating speed of a main shaft at 4000r/min, the feeding speed at 1000mm/min and the pre-pressing amount at 0.2mm; carrying out array rough polishing on a convection area, a leaf basin area, a leaf back area, an air inlet edge area and an air outlet edge area by using a rubber-based polishing wheel with 500#, r=1.5 mm and D=20.0 mm; and (3) carrying out array rough polishing on the areas of the blade basin blade root, the blade back blade root by using a rubber-based polishing wheel with the diameter of 500#, the diameter of r=1.5 mm and the diameter of D=12.0 mm. And throwing 8 blades each time until the rough throwing of the blisk is completed.
And then, performing array finish polishing. Setting the rotating speed of a main shaft at 4000r/min, the feeding speed at 1000mm/min and the pre-pressing amount at 0.2mm; selecting 2000#, r=1.5 mm and D=20.0 mm rubber-based polishing wheels to carry out array fine polishing processing on a convection area, a leaf basin area, a leaf back area, an air inlet edge area and an air outlet edge area; and (3) carrying out array finish polishing on the areas of the blade basin blade root and the blade back blade root by using a rubber-based polishing wheel with the diameter of 2000#, the diameter of r=1.5 mm and the diameter of D=12.0 mm. And throwing 8 blades each time until the fine throwing of the blisk is completed.
And then, carrying out finishing and strengthening integrated processing. Adopting island-free vibration finishing equipment, installing a blisk, putting a stainless steel disc-shaped abrasive into the blisk for vibration finishing and strengthening integrated processing, and carrying out vibration time: front side 1h and back side 1h; vibration frequency: 50HZ; grinding fluid spraying time: the front side is 10min, and the back side is 10min.
And then, measuring by using a three-coordinate measuring machine, wherein fig. 4 shows three-coordinate detection results, the three-coordinate detection results are all within the range of a tolerance zone, and the profile sizes of the blisk meet the design requirements. The surface roughness is detected by using a portable roughness meter, the roughness is Ra0.4mu m, the design requirement is met, the residual force in the depth direction is detected, as shown in figure 5, the surface residual pressure reaches more than 600MPa, the residual pressure can inhibit the generation of fatigue cracks to a certain extent, the preparation of the blisk with high shape precision and high surface quality can be realized by the method, meanwhile, the processing time for processing the blisk by the method is only half of the time for numerical control milling of the blisk, and the processing efficiency is greatly improved.
The invention is not a matter of the known technology.
Although embodiments of the present 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 therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (6)
1. A method for electrolytic rough opening, array polishing and finishing strengthening of a blisk is characterized in that: the method comprises the following steps:
1) Carrying out electrolytic rough opening processing on the blisk;
2) The dimension control method of the superhard grinding wheel comprises the following steps:
3) During array grinding, selecting proper superhard grinding wheel sizes and grinding parameters according to different subareas;
4) When the array is ground, the blade body grinding track can be performed in a spiral peripheral grinding or longitudinal grinding mode, so that the removal amount is ensured to be uniform;
5) When the array is polished, selecting a proper polishing tool according to different subareas;
6) When the array is polished, proper array polishing parameters are adopted;
7) When the array is polished, the surface of the air inlet and outlet edges can be longitudinally polished along the direction of the air inlet and outlet edges;
8) The vibration finishing equipment is an island-free vibration finishing machine;
9) The new abrasive is pretreated before use, and is used after vibrating in a polishing machine for 3 hours.
2. The method for blisk electrolytic rough opening, array grinding and polishing and finishing strengthening according to claim 1, wherein the method comprises the following steps: the electrolytic rough opening processing of the blisk is specifically as follows:
the electrolytic rough mining is carried out by combining a trepanning cathode and a profiling split cathode, a blisk blank is arranged on an electrolytic machine tool workbench, electrolytic parameters are set, firstly, the trepanning cathode is adopted for blank electrolytic rough slotting, then, the profiling split cathode is adopted for electrolytic shaping processing of a blisk blade body of the rough slotting, the blisk allowance is controlled within 0.3-0.5mm after electrolytic shaping, and then, a three-coordinate measuring machine is adopted for detecting the blisk;
then, according to the structural characteristics of the blisk and the blade ring parts, reasonably partitioning the blisk, dividing a blisk processing model into three areas, namely a runner area, a blade root area and a blade body area, generating a numerical control program by using UG software, optimizing the processing program according to the processed part measurement result, clamping the parts on an array grinding and polishing machine tool, and respectively carrying out array rough grinding and fine grinding processing on the runner area, the blade root area and the blade body area by selecting proper superhard grinding wheels; in the processing process, the dimension of the superhard grinding wheel is strictly controlled, so that the processing precision and consistency of the blisk blade of the array grinding are ensured;
dividing the blisk processing model into seven areas, namely a runner area, a blade basin blade root, a blade back blade root, a blade basin area, a blade back area, an air inlet edge area and an air outlet edge area, generating a numerical control polishing program by using UG software, and carrying out blisk partition rough and fine polishing processing on an array polishing machine tool by using corresponding polishing tools and polishing parameters;
performing finishing and strengthening integrated processing; stainless steel disc-shaped abrasive materials are put into the vibration polishing equipment, and the polishing liquid is sprayed to carry out vibration polishing and strengthening integrated processing, so that the vibration time is prolonged: the front surface is 1-2h, and the back surface is 1-2h; the vibration frequency is 50HZ; grinding fluid spraying time: the front side is 10min, and the back side is 10min; the finishing enhancement parameters can also be determined experimentally.
3. The method for blisk electrolytic rough opening, array grinding and polishing and finishing strengthening according to claim 1, wherein the method comprises the following steps: the dimension control method of the superhard grinding wheel comprises the following steps: firstly, carrying out uniform grinding on the outer diameter of a superhard grinding wheel, and adopting a common grinding machine to drive a large-diameter diamond repairing device to grind the outer diameter of a small-diameter superhard grinding wheel, wherein the grinding amount is 0.01-0.03mm; the round trip deviation of the trimmed grinding wheel is within 0.02mm;
measuring the maximum outer diameter of the superhard grinding wheel in the rotation process by adopting non-contact point laser, analyzing the detection result, and keeping the grinding wheel with the maximum outer diameter deviation within 0.03mm for array grinding and polishing;
in the initial stage of machining, carrying out on-line detection on the superhard grinding wheel once for 7 blisk blades to be machined, measuring the maximum outer diameter of the grinding wheel, compensating the grinding and polishing machining program according to the abrasion loss, and continuously machining the next blisk blade; through detection for several times, the abrasion rule of the ultra-hard grinding wheel can be searched out, the compensation parameters are solidified, then the grinding wheel is detected without processing 7 blisk blades, and the sampling inspection can be performed after a certain batch is processed.
4. The method for blisk electrolytic rough opening, array grinding and polishing and finishing strengthening according to claim 1, wherein the method comprises the following steps: when the array is ground, proper superhard grinding wheel sizes and grinding parameters are selected according to different subareas; wherein the rotation speed of the main shaft is 20000-30000r/min, the feeding speed is 500-1000mm/min and the cutting depth is 0.05-0.1mm during the rough grinding of the array grinding; the machining parameters used in the fine grinding are that the spindle rotation speed is 20000-30000r/min, the feeding speed is 500-1000mm/min, and the cutting depth is 0.01-0.05mm; the blade body grinding track can be performed by adopting a spiral peripheral grinding or longitudinal grinding mode, but the removal amount is uniform.
5. The method for blisk electrolytic rough opening, array grinding and polishing and finishing strengthening according to claim 1, wherein the method comprises the following steps: the array is polished, and proper polishing tools are selected according to different subareas; using a rubber-based flexible polishing wheel; the polishing wheel base body is elastic rubber, the outer layer is an abrasive layer, and the polishing wheel has certain flexibility and can realize self-adaptive processing during polishing; the polishing wheel 400# -800# is used in rough polishing, and the polishing wheel 1500# -2000# is used in fine polishing;
array polishing, adopting proper array polishing parameters; setting the rotating speed of the main shaft at 4000-6000r/min, the feeding speed at 1000-3000mm/min and the pre-pressing amount at 0.1-0.3mm during rough polishing; the spindle rotating speed can be set to 4000-6000r/min during finish polishing, the feeding speed is 800-2000mm/min, and the pre-pressing amount is 0.1-0.3mm; when the array is polished, longitudinal polishing is performed along the direction of the air inlet and outlet sides in order to ensure the surface of the air inlet and outlet sides.
6. The method for blisk electrolytic rough opening, array grinding and polishing and finishing strengthening according to claim 1, wherein the method comprises the following steps: the vibration finishing equipment is an island-free vibration finishing machine, the pretreatment is carried out before the new abrasive is used, and the vibration finishing machine vibrates for 3 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202311250671.9A CN117300741A (en) | 2023-09-26 | 2023-09-26 | Method for electrolytic rough cutting, array polishing and polishing strengthening of blisk |
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| CN202311250671.9A CN117300741A (en) | 2023-09-26 | 2023-09-26 | Method for electrolytic rough cutting, array polishing and polishing strengthening of blisk |
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| CN202311250671.9A Pending CN117300741A (en) | 2023-09-26 | 2023-09-26 | Method for electrolytic rough cutting, array polishing and polishing strengthening of blisk |
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2023
- 2023-09-26 CN CN202311250671.9A patent/CN117300741A/en active Pending
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