CN117943800A - Turbine machining method - Google Patents
Turbine machining method Download PDFInfo
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- CN117943800A CN117943800A CN202410356196.1A CN202410356196A CN117943800A CN 117943800 A CN117943800 A CN 117943800A CN 202410356196 A CN202410356196 A CN 202410356196A CN 117943800 A CN117943800 A CN 117943800A
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- 238000003754 machining Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims description 29
- 238000003801 milling Methods 0.000 claims abstract description 36
- 239000002184 metal Substances 0.000 claims abstract description 29
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 230000005489 elastic deformation Effects 0.000 claims abstract description 4
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000003672 processing method Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 description 7
- 238000005553 drilling Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
Classifications
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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
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/006—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine wheels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The invention discloses a turbine processing method, which is applied to the technical field of machining, and comprises the following steps: s1, processing inner holes penetrating through two ends of a metal bar along a middle shaft of the metal bar to obtain a first blank; s2, finely machining the inner hole and the appearance of the first blank to preset sizes to obtain a second blank; s3, fixing one end of a fixture on a clamping jaw of a machine tool, sleeving the second blank on the periphery of the fixture, tensioning the second blank by using elastic deformation of the fixture, and abutting a movable rotating center of the machine tool against the other end of the fixture; and S4, carrying out finish milling on the outer wall of the second blank body to obtain a turbine blade, and obtaining the turbine. According to the technical scheme, the work piece is fixed through the tooling fixture from the inner hole tensioning of the second blank, the difficulty of machining and clamping is reduced, and the rigidity of a machining structure is improved through fixing the two ends of the second blank.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a turbine machining method.
Background
Conventional displacement turbines are power plant drive units on oil drilling equipment. The turbine has a complex and irregular shape structure, high requirements on machining precision and thin wall thickness, so that the machining process is relatively complex. In order to ensure the working accuracy, the service performance and the service life of equipment, the machining process is required to be optimized, and a special fixture is designed to clamp and machine the turbine, so that the machining efficiency of the turbine can be improved under the condition of ensuring the machining accuracy.
In the traditional turbine machining method, a five-axis machine tool is generally adopted for machining, a workpiece is clamped on a three-jaw chuck of the five-axis machine tool, then a finish milling process is carried out on the workpiece to machine the turbine blade, if the turbine blade is machined according to the traditional machining process, because two ends of the turbine can be used for clamping positions smaller and are usually less than 5mm, in order to reduce interference during machining, a process clamping position which is long enough is required to be reserved, the five-axis machine tool is used for fixing the workpiece in a single-end mode, and the workpiece is longer in overhanging and lower in rigidity. And about 50mm of stub bars are wasted when the processing is performed according to the method, the wall thickness of a workpiece is thinner, and finish turning is performed integrally after finish milling in order to ensure the processing precision of the inner circle and the outer circle. The excircle is irregular when the precision is finished, intermittent cutting is needed, the damage to the cutter is large, the processing efficiency is low, the cost is high, and the mass production is not facilitated. Therefore, the problems of difficult machining, clamping and positioning, large material loss, long overhanging of the workpiece, low rigidity and the like frequently occur in the traditional process, the workpiece is finally caused to have long machining period, the material loss is large, the dimensional error of a finished turbine cannot be ensured, and the cost is also increased.
Disclosure of Invention
The invention mainly aims to provide a turbine machining method which aims to improve the machining precision and the machining efficiency of a turbine.
In order to achieve the above object, the present invention provides a turbine processing method, comprising the steps of:
s1, processing inner holes penetrating through two ends of a bar along a central axis of the bar to obtain a first blank;
S2, finely machining the inner hole and the appearance of the first blank to preset sizes to obtain a second blank;
S3, fixing one end of a fixture on a clamping jaw of a machine tool, sleeving the second blank on the periphery of the fixture, tensioning the second blank by using elastic deformation of the fixture, and abutting a movable rotating center of the machine tool against the other end of the fixture;
and S4, carrying out finish milling on the outer wall of the second blank body to obtain a turbine blade, and obtaining the turbine.
Optionally, the step S1 includes:
Discharging, namely selecting a metal bar as a processing raw material;
rough turning, namely turning the outline dimension of the metal bar to a preset rough turning dimension;
boring, namely, boring an inner hole with the diameter of a preset inner hole size along the axial direction of the rough turned metal bar;
sawing, namely cutting the drilled metal bar into a plurality of sections to obtain a first blank, wherein the length of each section of the first blank is more than 77mm.
Optionally, in the step S2, the preset size includes: the diameter of the inner hole of the second blank body is 52-52.1 mm, the outer diameter of the second blank body is 103.95-104.05 mm, and the length of the second blank body is 66.6-67.1 mm.
Optionally, the step S2 includes:
Semi-finish turning, namely turning the inner hole and the external dimension of the first blank to a preset semi-finish turning dimension;
and (3) finish turning, namely turning the inner hole and the external dimension of the first blank after semi-finish turning to the preset dimension to obtain the second blank.
Optionally, in the step S3, the tool fixture includes a shaft, a tensioning sleeve, and a lock nut; the shaft comprises a threaded section, a tensioning section and a fixing section which are sequentially connected along the axial direction; the diameter of the tensioning section extends from the threaded section to the fixed section and gradually increases; the second blank is sleeved on the periphery of the tensioning sleeve, the tensioning sleeve is sleeved on the periphery of the tensioning section, and the locking nut is in threaded connection with the threaded section and abuts against the tensioning sleeve, so that the tensioning sleeve is elastically deformed to tension the second blank.
Optionally, a groove is radially formed on the outer wall of one end of the fixing section, which is close to the tensioning section;
the step S3 further includes: milling a boss at one end of the second blank; and when the second blank is sleeved on the periphery of the tensioning sleeve, the boss is spliced and positioned with the groove.
Optionally, in step S3, after the second blank and the fixture are clamped in place, the second blank is subjected to reference leveling, so as to ensure that circle runout tolerance at two ends of the second blank is within 0.05 mm.
Optionally, step S4 specifically includes:
rough milling a blade groove by adopting a square shoulder milling cutter with a specification of a first preset diameter;
rough milling a blade groove by adopting a round nose milling cutter with a specification of a second preset diameter;
The sharp edges of the blades are dulled by a circular nose milling cutter with the specification of a third preset diameter;
Adopting a round nose milling cutter with a specification of a third preset diameter to finish milling the blade;
wherein the first preset diameter is greater than the second preset diameter and greater than the third preset diameter.
Optionally, the following steps are further included after the step S4:
S5, sharp corner burrs are removed and sharp edges are subjected to blunting treatment on the turbine.
Optionally, the following steps are further included after the step S5:
S6, checking the blade profile by adopting a three-dimensional profile scanner so as to enable the size and the appearance of the turbine to meet preset requirements.
According to the technical scheme, the workpiece and the tool clamp are fixed by a method of tensioning the elastically deformable tool clamp from the inner hole of the workpiece, a process clamping position is not required to be reserved for equipment to fix, consumable materials in the production process are reduced, and the processing period of the workpiece is shortened. Meanwhile, the workpiece to be machined can be fixed on equipment by sleeving the workpiece outside the fixture, and the problem of difficult machining, clamping and positioning caused by too few reserved clamping positions of the workpiece can be solved. In addition, the technical scheme of the invention fixes the two ends of the fixture sleeved with the workpiece before machining the turbine blade, so that the problem that the workpiece is too long in overhanging and low in rigidity can be avoided, and the dimensional error of a finished turbine is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic illustration of an embodiment of a turbine processing method according to the present invention;
FIG. 2 is a schematic diagram of a turbine finished product obtained by processing an embodiment of a turbine processing method according to the present invention;
fig. 3 is a schematic structural diagram of a tooling fixture according to an embodiment of the invention.
Reference numerals illustrate:
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides a turbine processing method.
1-2, FIG. 1 is a schematic illustration of an embodiment of a turbine processing method according to the present invention; FIG. 2 is a schematic diagram of a turbine finished product obtained by processing an embodiment of a turbine processing method according to the present invention; in one embodiment, the present invention provides a turbine processing method, comprising the steps of:
s1, processing inner holes penetrating through two ends of a bar along a central axis of the bar to obtain a first blank;
S2, finely machining the inner hole and the appearance of the first blank to preset sizes to obtain a second blank;
S3, fixing one end of a fixture on a clamping jaw of a machine tool, sleeving the second blank on the periphery of the fixture, tensioning the second blank by using elastic deformation of the fixture, and abutting a movable rotating center of the machine tool against the other end of the fixture;
And S4, carrying out finish milling on the outer wall of the second blank to obtain a turbine blade, and obtaining the turbine 10.
In this embodiment, a metal bar of a suitable size is selected as the original material for processing, and the diameter and length of the selected bar need to be larger than the maximum diameter and length of the final product, so as to reserve a machining allowance to ensure the dimensional requirements of the final product turbine. In step S1, the drilling machine is used for drilling the metal bar, so that the production efficiency is improved, the metal bar with longer length can be used, the length required by cutting each workpiece can be cut after drilling, a plurality of workpiece materials can be drilled at one time, multiple operations are avoided, and the production time and cost are saved. Step S1, a first blank with a deep hole in the middle axis direction is obtained after drilling operation, the first blank is cut and the length of the first blank is processed to a preset size, a plurality of second blanks for processing a single turbine are obtained, and when the second blank is processed, one end of a fixture is fixed on a processing station of a machine tool, so that the fixture can move in position and axially rotate under the action of a machine tool motor; after the fixture is fixed, the second blank obtained in the step S2 is sleeved on the fixture, the fixture can be elastically deformed, and the gap between the inner wall of the second blank and the fixture can be reduced and a huge friction force can be generated by tensioning the deformable part of the fixture, so that the second blank and the fixture cannot move relatively, and further can move or rotate synchronously with the fixture; after the second blank body is clamped, the center arranged at the other end of the axial direction of the equipment is driven to abut against the other end of the tool clamp, which is not fixed, so that the two ends of the tool clamp are fixed under the action of a machine tool, and the rigidity of the second blank body during processing is ensured. After the second blank is fixed with the fixture, the driving device works according to preset parameters, the turbine blade is obtained through milling, a series of finish machining is carried out to ensure that the turbine error is within a required range, and finally the finished turbine 10 is obtained.
According to the technical scheme, a first blank is obtained by processing an inner hole of a metal bar to a preset inner hole size, and then the first blank is processed to a preset size to obtain a second blank for processing a single turbine; then the second blank is fixed with a fixture which is fixed at a machining station of a machine tool, and the fixture and the workpiece can be synchronously moved by a method of tensioning the elastically deformable fixture from an inner hole of the workpiece, so that a process clamping position is not required to be reserved on the second blank for clamping by equipment, the material loss is reduced, and compared with the traditional turbine machining method, the operation of removing the process clamping position is not required, and the machining period of the workpiece is shortened; the workpiece to be processed can be fixed on the equipment by sleeving the workpiece outside the fixture, so that the problem of difficult processing, clamping and positioning caused by too few reserved clamping positions of the workpiece can be solved; after the second blank is fixed, the unfixed end of the fixture is fixed and then machined, so that the problem that the workpiece rigidity is reduced due to the fact that the workpiece is too far overhanging can be avoided, and the dimensional error of the finished turbine 10 is reduced.
In one embodiment, the step S1 specifically includes:
Discharging, namely selecting a metal bar as a processing raw material;
rough turning, namely turning the outline dimension of the metal bar to a preset rough turning dimension;
Boring, namely boring an inner hole of the roughly turned metal bar along the axial direction;
sawing, namely cutting the drilled metal bar into a plurality of sections to obtain a first blank, wherein the length of each section of the first blank is more than 77mm.
In the embodiment, in order to process a standard parameter turbine with conventional displacement, a standard pipe with a diameter of 110mm and a length of 530mm can be selected as an initial metal material, so that the machining allowance in the processing process can be ensured, the redundant materials can be reduced as much as possible, and the production cost is saved. In addition, the length of the bar for drilling can be increased as much as possible in the range of machining, so that the length of the obtained first blank is increased; the metal bar with the outer diameter of 108mm and the length of 528mm is obtained through rough turning, a conical disc bayonet is cut at one end part of the metal bar, the bayonet is a groove which extends from the periphery Xiang Yanjing to the direction and forms an included angle of 15 degrees with a center shaft, the radial width of the groove is 4mm, the diameter of the tail end of the groove is slightly smaller than that of the metal bar, and the metal bar can be more easily clamped into a fixed port corresponding to a deep hole boring machine through a buckle; then through boring and boring a through hole with the preset inner hole size of 45mm along the axial direction of the metal bar, cutting the metal bar with the through hole into first blanks with the lengths of more than 77mm in each section through a band sawing machine, wherein the section with the conical disc bayonet is required to be cut off the groove, so that the length of the remaining blanks after the groove is cut off can be processed into second blanks, and the section with the groove is cut into metal sections with the lengths of more than 90 mm.
In one embodiment, in step S2, the preset dimensions include: the diameter of the inner hole of the second blank is 52-52.1 mm, the outer diameter is 103.95-104.05 mm, the length is 66.6-67.1 mm, and the preset size can ensure that the second blank has sufficient machining allowance, reduce the workload required to be processed in the step S2 and reduce the processing difficulty of the step S2.
In one embodiment, step S2 specifically includes:
Semi-finish turning, namely turning the inner hole and the external dimension of the first blank to a preset semi-finish turning dimension;
and (3) finish turning, namely turning the inner hole and the external dimension of the first blank after semi-finish turning to the preset dimension to obtain the second blank.
In this embodiment, the preset half-finish turning size in step S2 includes: the outer diameter is 105.8 mm-106.2 mm, the inner hole diameter is 49.8 mm-50.2 mm, and the length is 68.65-69.05 mm.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a tooling fixture according to an embodiment of the present invention; in one embodiment, in step S3, the tool fixture includes a shaft 1, a tension sleeve 2, and a lock nut 3; the shaft 1 comprises a threaded section, a tensioning section and a fixing section which are sequentially connected along the axial direction 1; the diameter of the tensioning section gradually increases from the threaded section to the fixed section; the second blank is sleeved on the periphery of the tensioning sleeve 2, the tensioning sleeve 2 is sleeved on the periphery of the tensioning section, and the locking nut 3 is in threaded connection with the threaded section and abuts against the tensioning sleeve 2, so that the tensioning sleeve 2 is elastically deformed to tension the second blank. In the embodiment, the diameter of the tensioning section of the shaft 1 gradually increases from the threaded section to the fixed section to form a cone shape, the tensioning sleeve 2 is a sleeve capable of elastically deforming, the shape of the inner wall of the sleeve is matched with that of the outer wall of the tensioning section, and the outer wall of the sleeve is cylindrical parallel to the shaft 1; penetrating a fixture clamp from an inner hole of a second blank, sleeving the second blank to the middle section of a tensioning sleeve 2, screwing a locking nut 3 into a threaded section to enable the locking nut to be propped against the tensioning sleeve 2, continuously rotating the locking nut 3 at the moment, enabling the tensioning sleeve 2 to move away from the tensioning nut along a shaft 1 under the action force of rotating the nut, and moving along the outer wall of a cone with gradually increased diameter, wherein the tensioning sleeve 2 is gradually stretched under the action of the cone, the diameter is increased, so that a gap between the outer wall of the tensioning sleeve 2 and the inner wall of the second blank is gradually reduced, and friction force is gradually increased until relative movement between the second blank and the tensioning sleeve 2 cannot occur; the junction of stiff end and tensioning section is equipped with two recesses, and recess and second idiosome cooperation can carry out spacingly to the second idiosome, have increased structural stability.
In one embodiment, the outer wall of one end of the fixed section, which is close to the tensioning section, is provided with a groove;
Step S3 further includes: milling a boss at one end of the second blank; when the second blank is sleeved on the periphery of the tensioning sleeve, the boss and the groove are spliced and positioned. In the embodiment, the boss size comprises a width of 5.67 mm-5.7 mm; the height is 3.95 mm-4 mm; the boss size position can be with recess looks adaptation in order to block into the recess, and the boss card is gone into behind the recess second idiosome and is just unable to carry out circumference rotation any longer, and whether the process of rising tightly or follow-up course of working can both promote the stability of structure, and the work piece of being convenient for processes.
In one embodiment, in step S3, after the second blank and the tooling fixture are clamped in place, performing reference leveling on the second blank to ensure that circle runout tolerance at two ends of the second blank is within 0.05 mm; the clamping and the center of the four-axis milling machine are used for fixing the two ends of the fixture clamp so as to ensure the rigidity and the stability of the turbine machining process, and meanwhile, the degree of deviation of a workpiece bus and the degree of circle runout of the two ends are determined before machining, so that the machining precision of the turbine is ensured, and the error of a finished turbine is reduced.
Optionally, step S4 specifically includes:
adopting a square shoulder milling cutter with a first preset diameter to roughly mill a blade groove;
Rough milling a blade groove by adopting a round nose milling cutter with a second preset diameter;
the sharp edges of the blades are dulled by adopting a round nose milling cutter with a third preset diameter;
Finely milling the blades by adopting a round nose milling cutter with a third preset diameter;
wherein the first preset diameter is greater than the second preset diameter and greater than the third preset diameter.
In this embodiment, the square shoulder milling cutter with the first preset diameter has a specification of D16R0.8, the round nose milling cutter with the second preset diameter has a specification of D12R2, and the round nose milling cutter with the third preset diameter has a specification of D4R2; after a series of processing measures such as rough milling, finish milling and dulling are carried out on the blades and the blade grooves, the turbine meeting factory standards can be obtained, so that faults can be reduced when the turbine is applied to various machines in the future, and normal working operation of equipment is ensured.
In an embodiment, after step S4, the following steps are further included:
S5, sharp corner burrs are removed and sharp edges are subjected to blunting treatment on the turbine. The damage of the sharp metal corner burrs to other parts of the equipment is reduced when the turbine is applied to the equipment in the future, and the damage of the sharp metal corner burrs to other parts of the equipment is prevented from scratching other parts in the equipment, so that the turbine meets the preset surface requirements of the workpiece.
In an embodiment, after step S5, the following steps are further included:
S6, checking the blade profile by adopting a three-dimensional profile scanner so as to enable the size and the appearance of the turbine to meet preset requirements. So that the dimensional tolerance of the turbine meets the preset requirement to meet the high-precision requirement of the turbine machinery.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (10)
1. A turbine machining method, characterized in that the turbine machining method comprises the steps of:
s1, processing inner holes penetrating through two ends of a metal bar along a middle shaft of the metal bar to obtain a first blank;
S2, finely machining the inner hole and the appearance of the first blank to preset sizes to obtain a second blank;
S3, fixing one end of a fixture on a clamping jaw of a machine tool, sleeving the second blank on the periphery of the fixture, tensioning the second blank by using elastic deformation of the fixture, and abutting a movable rotating center of the machine tool against the other end of the fixture;
and S4, carrying out finish milling on the outer wall of the second blank body to obtain a turbine blade, and obtaining the turbine.
2. The turbine machining method of claim 1, wherein the step S1 includes:
Discharging, namely selecting a metal bar as a processing raw material;
rough turning, namely turning the outline dimension of the metal bar to a preset rough turning dimension;
boring, namely, boring an inner hole with the diameter of a preset inner hole size along the axial direction of the rough turned metal bar;
sawing, namely cutting the drilled metal bar into a plurality of sections to obtain a first blank, wherein the length of each section of the first blank is more than 77mm.
3. The turbine machining method of claim 1, wherein in the step S2, the preset dimensions include: the diameter of the inner hole of the second blank body is 52-52.1 mm, the outer diameter of the second blank body is 103.95-104.05 mm, and the length of the second blank body is 66.6-67.1 mm.
4. A turbine machining method according to claim 3, wherein said step S2 comprises:
Semi-finish turning, namely turning the inner hole and the external dimension of the first blank to a preset semi-finish turning dimension;
and (3) finish turning, namely turning the inner hole and the external dimension of the first blank after semi-finish turning to the preset dimension to obtain the second blank.
5. The turbine machining method of claim 1, wherein in the step S3, the tool fixture includes a shaft, a tension sleeve, and a lock nut; the shaft comprises a threaded section, a tensioning section and a fixing section which are sequentially connected along the axial direction; the diameter of the tensioning section extends from the threaded section to the fixed section and gradually increases; the second blank is sleeved on the periphery of the tensioning sleeve, the tensioning sleeve is sleeved on the periphery of the tensioning section, and the locking nut is in threaded connection with the threaded section and abuts against the tensioning sleeve, so that the tensioning sleeve is elastically deformed to tension the second blank.
6. The turbine machining method of claim 5, wherein a groove is radially formed in an outer wall of the fixed section near one end of the tension section;
the step S3 further includes: milling a boss at one end of the second blank; and when the second blank is sleeved on the periphery of the tensioning sleeve, the boss is spliced and positioned with the groove.
7. The turbine machining method according to claim 1, wherein in the step S3, after the second blank and the fixture are clamped in place, the second blank is subjected to reference leveling to ensure that circle runout tolerance at two ends of the second blank is within 0.05 mm.
8. The turbine machining method of claim 1, wherein step S4 specifically includes:
rough milling a blade groove by adopting a square shoulder milling cutter with a specification of a first preset diameter;
rough milling a blade groove by adopting a round nose milling cutter with a specification of a second preset diameter;
The sharp edges of the blades are dulled by a circular nose milling cutter with the specification of a third preset diameter;
Adopting a round nose milling cutter with a specification of a third preset diameter to finish milling the blade;
wherein the first preset diameter is greater than the second preset diameter and greater than the third preset diameter.
9. The turbine machining method according to any one of claims 1 to 8, characterized by further comprising, after said step S4, the steps of:
S5, sharp corner burrs are removed and sharp edges are subjected to blunting treatment on the turbine.
10. The turbine machining method of claim 9, further comprising the step of, after said step S5:
S6, checking the blade profile by adopting a three-dimensional profile scanner so as to enable the size and the appearance of the turbine to meet preset requirements.
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| CN109759791A (en) * | 2019-02-01 | 2019-05-17 | 黑龙江省机械科学研究院 | Cavity thin-wall Centrifugal Impeller processing method in a kind of aerospace engine is accurate |
| CN109623294A (en) * | 2019-02-22 | 2019-04-16 | 宁国市华成金研科技有限公司 | A kind of processing method of aircraft turbine blades |
| CN114012369A (en) * | 2021-12-10 | 2022-02-08 | 哈电发电设备国家工程研究中心有限公司 | Method for machining high-rotation-speed impeller with end face teeth |
| CN115815992A (en) * | 2022-11-16 | 2023-03-21 | 黑龙江省机械科学研究院 | Machining method for shaft rotor of transmission part of aero-turbine engine |
| CN115971798A (en) * | 2022-12-09 | 2023-04-18 | 苏州千机智能技术有限公司 | Method and system for machining rotary workpiece, electronic device, and storage medium |
| CN117140352A (en) * | 2023-09-12 | 2023-12-01 | 中国航发南方工业有限公司 | Hydraulic elastic tensioning turbine rotor blade tip grinding fixture and processing method |
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