CN114850786A - Process for machining inner surface of rotating wheel water bucket - Google Patents
Process for machining inner surface of rotating wheel water bucket Download PDFInfo
- Publication number
- CN114850786A CN114850786A CN202210416348.3A CN202210416348A CN114850786A CN 114850786 A CN114850786 A CN 114850786A CN 202210416348 A CN202210416348 A CN 202210416348A CN 114850786 A CN114850786 A CN 114850786A
- Authority
- CN
- China
- Prior art keywords
- rotating wheel
- bucket
- water bucket
- machining
- positioning tool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B1/00—Engines of impulse type, i.e. turbines with jets of high-velocity liquid impinging on blades or like rotors, e.g. Pelton wheels; Parts or details peculiar thereto
- F03B1/02—Buckets; Bucket-carrying rotors
-
- 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
Abstract
The application relates to the technical field of water turbine processing, and discloses a process for processing the inner surface of a rotating wheel bucket, which comprises the following steps: step 1, placing a rotating wheel and a positioning tool in the center of a rotary worktable; step 2, hanging the rotating wheel with a hole facing downwards on a positioning tool; step 3, fixing the dial indicator on the end surface of the main shaft of the rotating wheel, and rotating the main shaft at a low speed; step 4, roughly milling the molded line of the inner surface of the water bucket; step 5, semi-finish milling the inner surface of the water bucket; step 6, roughly polishing the front surface of the water bucket, and combining the sample plates on the inner surface of the water bucket of the rotating wheel; step 7, the rotating wheel hole is downwards turned again, and the rotating wheel hole is hung on the positioning tool; and 8, mounting the Haoke energy actuator on a machine tool, and processing the inner surface and the root of the water bucket by using the composite energy to meet the requirement of pattern roughness. The polishing and hardening processing efficiency and the processing quality of the inner surface of the impact type runner bucket are improved, and the service life is prolonged.
Description
Technical Field
The invention relates to the technical field of water turbine machining, in particular to a machining process for the inner surface of a rotating wheel bucket.
Background
The runner is a core part of the water turbine generator set, and the on-site investigation of hydropower stations running in China shows that the defects of cavitation, cracks and the like on the overflowing surface of the water turbine runner are the most critical problems in the operation of the water turbine at present, so that the service life of the overflowing surface of the runner is prolonged, the operation reliability of the runner is improved, and the economic and technical losses of companies and power stations are reduced.
At present, the surface of the bucket of the impact runner is polished and hardened mainly by manually polishing the surface of the bucket, and the problems of cavitation erosion, cracks and the like on the flow passage surface of the runner of the water turbine cannot be solved due to large limitation of manual operation, so that the service life of the flow passage surface of the bucket is short.
Disclosure of Invention
The invention aims to provide a process for machining the inner surface of a rotating wheel bucket, which aims to solve the problem of short service life of the overflowing surface of the rotating wheel bucket.
In order to achieve the above object, the present invention adopts the following technical solutions.
The process for machining the inner surface of the rotating wheel bucket is characterized by comprising the following steps:
step 1, placing a rotating wheel and a positioning tool in the center of a rotary worktable;
step 4, roughly milling the molded line of the inner surface of the water bucket;
step 7, the rotating wheel hole is downwards turned again, and the rotating wheel hole is hung on the positioning tool;
and 8, mounting the Haoke energy actuator on a machine tool, and processing the inner surface and the root of the water bucket by using the composite energy to meet the requirement of pattern roughness.
In order to reduce the horizontal error of the surface of the water bucket, after the step 1 is finished, the workbench is rotated, the concentric error of the position of the positioning tool is adjusted to be less than or equal to 0.02mm, the upper plane of the positioning tool is checked by the dial indicator, and the error is less than or equal to 0.05 mm.
Further, after the step 2 is finished, rotating the workbench, adjusting the position of the rotating wheel to have a concentric error of less than or equal to 0.02mm, checking a connecting plane of a main shaft of the rotating wheel by a dial indicator, and having a horizontal error of less than or equal to 0.05 mm.
And (3) after the step 3 is finished, the machine tool is moved to align the inner hole, and the error is less than or equal to 0.05 mm.
And (5) after the step 5 is finished, remaining the allowance of 0.25-0.50mm on the inner surface of the semi-finish milling water bucket.
And 6, after the step 6 is finished, rotating the workbench, adjusting the position of the rotating wheel to have a concentricity error of less than or equal to 0.02mm, checking a main shaft connecting plane of the rotating wheel by a dial indicator, and having a horizontal error of less than or equal to 0.05 mm.
In the step 1, a face milling cutter is used for processing an upper plane, a pressing and firm positioning tool is arranged on a workbench, and a screw is pressed at a connecting screw hole of a flange of the runner by taking a hole of the runner, a large plane of the processed water bucket, the back of the water bucket processed by numerical control and the end face of the flange as references.
Has the advantages that: compared with the traditional cutter D20R1.75, D20R5 and D35R1.7, the process for machining the inner surface of the rotating wheel bucket provided by the invention has the advantages that the highest cutter rotating speed borne by the cutter D20R1.75, D20R5 and D20R 3556 is 2000(R/min), the feed amount reaches 3000(mm/min), the cutting depth is 0.25 (mm), the cutter rotating speed borne by a Haoke energy actuator is 3000 plus 5000(R/min), the feed amount reaches 5000(mm/min), and the cutting depth is only 0.10 (mm), so that after the inner surface of the rotating wheel bucket is subjected to Haoke energy surface treatment, the roughness and the wear resistance of the inner surface of the rotating wheel bucket are greatly improved, the polishing and hardening machining efficiency and the machining quality of the inner surface of the impact type rotating wheel bucket are improved, the polishing and hardening machining quality of the surface after rough milling, semi-finish milling and rough grinding machining are improved by adjusting the accuracy of the machining position of the water bucket, and the service life is prolonged.
Drawings
FIG. 1 is a schematic view of an installation structure in the embodiment;
FIG. 2 is a shape diagram of a Haokay actuator special for processing a water bucket;
FIG. 3 is a view of the contour of a Hakelong actuator for machining the root of a bucket.
Reference numerals: 1. a runner hole; 2. a positioning tool; 3. a work table; 4. the inner surface of the water bucket; 5. haokay actuator; 6. and (7) boring a rod.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the following embodiments are only used for understanding the principle of the present invention and the core idea thereof, and do not limit the scope of the present invention. It should be noted that modifications to the invention as described herein, which do not depart from the principles of the invention, are intended to be within the scope of the claims which follow.
Example 1
A technology for processing the inner surface of a rotating wheel bucket comprises the following specific steps:
1. as shown in figure 1, when the inner surface 4 of the bucket is milled, a rotating wheel and a positioning tool 2 are placed in the center of a rotary workbench 3, the rotary workbench 3 is rotated, a dial indicator checks a spigot of the positioning tool 2, the concentricity error of the position of the positioning tool 2 is adjusted to be less than or equal to 0.02mm, the dial indicator checks the upper plane of the positioning tool 2, the error is less than or equal to 0.05mm, if the horizontal error cannot meet the requirement, a face milling cutter is used for processing the upper plane to meet the requirement, and the positioning tool 2 is tightly pressed on the workbench 3. The turning wheel hole 1, the processed large plane of the bucket, the back of the bucket which is processed by numerical control and the flange end face are taken as references, and the turning wheel flange is tightly pressed at the connecting screw hole through a screw rod;
2. a rotating wheel hole 1 faces downwards, the rotating wheel hole is hung on a positioning tool 2, a workbench 3 is rotated, a dial indicator checks the rotating wheel hole 1, the concentric error of the position of a rotating wheel is adjusted to be less than or equal to 0.02mm, the dial indicator checks the connecting plane of a main shaft of the rotating wheel, the horizontal error is less than or equal to 0.05mm, and the data can be processed only if the data is qualified;
3. fixing the dial indicator on the end surface of the main shaft of the rotating wheel, rotating the main shaft at a low speed, and moving a machine tool to align an inner hole, wherein the error is less than or equal to 0.05 mm. Recording X, Y, V axis coordinates of the machine tool, setting the axis coordinates as a processing coordinate origin, setting a Z axis origin according to the plane thickness of a connecting flange of a main shaft of a rotating wheel, using a dial indicator as the center of a connecting hole for adjusting the surface and processing the alignment before the alignment, recording X, Y coordinate values relative to the processing coordinate, calculating the distribution included angle between the hole and the Y axis direction of the machine tool, calculating the deviation value of the included angle between the hole and a drawing, inputting the deviation value in the processing deviation of the machine tool (G54), recording the current C axis angle, setting the current C axis angle as 0 degree, and verifying whether the workpiece is at the position of 0 degree according to the large plane coordinate value of a water bucket;
4. roughly milling the molded line 4 on the inner surface of the water bucket;
5. the inner surface 4 of the semi-finish milling water bucket is left with a margin of 0.25-0.50 mm;
6. installing an 80# angle grinding piece by using a pneumatic angle grinder or installing a 60# thousand impeller by using a pneumatic grinder to roughly grind the front surface of the water bucket, removing residual wave crests of numerical control processing to enable the wave crests to be smooth, combining 4 sample plates on the inner surface of the water bucket of the rotating wheel, wherein the roughness is required to reach Ra6.3 (including processing casting defects and grinding the surface to be smooth), and also allowing a rubber grinding wheel to be used for roughly grinding;
7. downwards hanging the rotating wheel hole 1 on the positioning tool 2 again, rotating the workbench 3, checking the rotating wheel hole 1 by using a dial indicator, adjusting the concentric error of the rotating wheel position to be less than or equal to 0.02mm, checking the connecting plane of the main shaft of the rotating wheel by using the dial indicator, and keeping the horizontal error to be less than or equal to 0.05 mm;
8. the Hooke actuator 5 is arranged on a boring bar 6 of a machine tool, the inner surface 4 and the root of a machining water bucket with composite energy meet the requirement of pattern roughness, the lengthened Hooke actuator 5 is required to be used for machining the root of the water bucket, a cutter head is in a ball type, the machining line type Hooke actuator 5 is required to be used for machining the inner surface 4 of the water bucket, and the cutter head is in a fixed ball type;
9. the sample plate is polished on the inner surface 4 of the water bucket of the combined rotating wheel, the curved surface is required to be smooth, the pit phenomenon is not allowed, the molded line meets the requirement of dimensional deviation, the waviness meets the requirement of a drawing, and the roughness is Ra1.6-Ra0.8.
Claims (7)
1. A process for machining the inner surface of a rotating wheel bucket is characterized by comprising the following steps:
step 1, placing a rotating wheel and a positioning tool (2) in the center of a rotary worktable (3);
step 2, hanging the rotating wheel hole (1) downwards on the positioning tool (2);
step 3, fixing the dial indicator on the end surface of the main shaft of the rotating wheel, and rotating the main shaft at a low speed;
step 4, roughly milling a molded line of the inner surface (4) of the water bucket;
step 5, semi-finish milling the inner surface (4) of the water bucket;
step 6, roughly polishing the front surface of the water bucket, and combining sample plates on the inner surface (4) of the water bucket;
7, hanging the rotating wheel hole (1) downwards on the positioning tool (2);
and 8, mounting the Hakken energy actuator (5) on a machine tool, and processing the inner surface (4) and the root of the water bucket by using composite energy to meet the requirement of pattern roughness.
2. The process for machining the inner surface of the rotating wheel bucket according to claim 1, wherein the process comprises the following steps: after the step 1 is finished, rotating the workbench (3), adjusting the position of the positioning tool (2) to have a concentric error of less than or equal to 0.02mm, and checking the upper plane of the positioning tool (2) by using a dial indicator to have an error of less than or equal to 0.05 mm.
3. The process for machining the inner surface of the rotating wheel bucket according to claim 2, wherein the process comprises the following steps: and (3) after the step 2 is finished, rotating the workbench (3), adjusting the position concentricity error of the rotating wheel to be less than or equal to 0.02mm, checking the connecting plane of the main shaft of the rotating wheel by a dial indicator, and adjusting the horizontal error to be less than or equal to 0.05 mm.
4. The process for machining the inner surface of the rotating wheel bucket according to claim 3, wherein the process comprises the following steps: and (3) after the step 3 is finished, moving the machine tool to align the inner hole, wherein the error is less than or equal to 0.05 mm.
5. The process for machining the inner surface of the rotating wheel bucket according to claim 4, wherein the process comprises the following steps: and (5) after the step 5 is finished, remaining the allowance of the inner surface (4) of the semi-finish milling water bucket by 0.25-0.50 mm.
6. The process for machining the inner surface of the rotating wheel bucket according to claim 5, wherein the process comprises the following steps: and 6, after the step 3 is finished, rotating the workbench (3), adjusting the position concentricity error of the rotating wheel to be less than or equal to 0.02mm, checking a connecting plane of a main shaft of the rotating wheel by a dial indicator, and adjusting the horizontal error to be less than or equal to 0.05 mm.
7. The process for machining the inner surface of the rotating wheel bucket according to any one of claims 1 to 6, wherein: in the step 1, a face milling cutter is used for processing an upper plane, a firmly-pressing positioning tool (2) is arranged on a workbench (3), and a screw is used for pressing at a connecting screw hole of a flange of the rotating wheel by taking the rotating wheel hole (1), the processed large plane of the water bucket, the back of the water bucket processed by numerical control and the end face of the flange as references.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210416348.3A CN114850786A (en) | 2022-04-20 | 2022-04-20 | Process for machining inner surface of rotating wheel water bucket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210416348.3A CN114850786A (en) | 2022-04-20 | 2022-04-20 | Process for machining inner surface of rotating wheel water bucket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114850786A true CN114850786A (en) | 2022-08-05 |
Family
ID=82631321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210416348.3A Pending CN114850786A (en) | 2022-04-20 | 2022-04-20 | Process for machining inner surface of rotating wheel water bucket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114850786A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102744579A (en) * | 2012-07-26 | 2012-10-24 | 哈尔滨电机厂有限责任公司 | Process method for manufacturing impulse turbine runner by mechanical equipment |
| EP2777869A1 (en) * | 2013-03-11 | 2014-09-17 | Sulzer Metco AG | Method for manufacturing a final component |
| CN106514147A (en) * | 2016-11-23 | 2017-03-22 | 沈阳黎明航空发动机(集团)有限责任公司 | Precise machining method for molded surfaces of high-temperature alloy compressor blades |
| CN108115371A (en) * | 2016-11-29 | 2018-06-05 | 沈阳格泰水电设备有限公司 | A kind of numerical-control processing method of turbine blade |
| CN109604960A (en) * | 2018-12-19 | 2019-04-12 | 内蒙古北方重型汽车股份有限公司 | Quarry tipper wet brake processing method of casing |
| CN111168158A (en) * | 2020-03-14 | 2020-05-19 | 重庆水轮机厂有限责任公司 | High-water-head impact type runner bucket surface composite energy processing method |
| US20210164354A1 (en) * | 2018-04-20 | 2021-06-03 | Ge Renewable Technologies | Reduced scale runner and method of manufacturing thereof |
-
2022
- 2022-04-20 CN CN202210416348.3A patent/CN114850786A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102744579A (en) * | 2012-07-26 | 2012-10-24 | 哈尔滨电机厂有限责任公司 | Process method for manufacturing impulse turbine runner by mechanical equipment |
| EP2777869A1 (en) * | 2013-03-11 | 2014-09-17 | Sulzer Metco AG | Method for manufacturing a final component |
| CN106514147A (en) * | 2016-11-23 | 2017-03-22 | 沈阳黎明航空发动机(集团)有限责任公司 | Precise machining method for molded surfaces of high-temperature alloy compressor blades |
| CN108115371A (en) * | 2016-11-29 | 2018-06-05 | 沈阳格泰水电设备有限公司 | A kind of numerical-control processing method of turbine blade |
| US20210164354A1 (en) * | 2018-04-20 | 2021-06-03 | Ge Renewable Technologies | Reduced scale runner and method of manufacturing thereof |
| CN109604960A (en) * | 2018-12-19 | 2019-04-12 | 内蒙古北方重型汽车股份有限公司 | Quarry tipper wet brake processing method of casing |
| CN111168158A (en) * | 2020-03-14 | 2020-05-19 | 重庆水轮机厂有限责任公司 | High-water-head impact type runner bucket surface composite energy processing method |
Non-Patent Citations (1)
| Title |
|---|
| 施旭明;: "整锻冲击式转轮整体数控加工工艺研究" * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110355537B (en) | Method for machining penult-stage and last-stage moving blades of steam turbine | |
| CN104786078B (en) | The numerical-control processing method and its matching tooling fixture of overall titanium alloy impeller | |
| CN110102989B (en) | Processing method of compressed air impeller of VTR series supercharger | |
| CN103418991A (en) | Machining process of large duplex stainless steel impeller | |
| CN112454171B (en) | Method and device for dressing superhard material grinding wheel | |
| CN102922397A (en) | Accessory lathe-grinding integration device for lathe machining center and use method thereof | |
| CN114850786A (en) | Process for machining inner surface of rotating wheel water bucket | |
| CN210967023U (en) | Chamfering tool for simultaneously machining double faces of parts with irregular shapes | |
| CN113828838A (en) | Method for machining key groove of inner hole of large impeller | |
| CN111571153A (en) | Method for machining blade profile of Kaplan turbine blade | |
| CN111571132B (en) | Thin-wall bearing outer ring turning method and outer ring end surface groove symmetry measuring method of thin-wall bearing | |
| CN110125630B (en) | Method for machining pivot holes of runner hub blades of Kaplan turbine | |
| CN109465970B (en) | Method for processing silicon nitride complex phase ceramic high temperature resistant composite material thin wall curved surface structural member | |
| CN113020923A (en) | Processing method for convex key on slender shaft of high-capacity high-rotating-speed generator motor | |
| CN211661744U (en) | Three eccentric butterfly valve clamping platform | |
| CN115213781B (en) | Chamfering tool for edges of composite material parts and machining method | |
| CN216325421U (en) | Processing positioning structure of odd-even hole template | |
| CN107953083A (en) | Reinforcement leading screw method for processing wedge block | |
| CN115922235A (en) | Composite machining process for precision spigot of bearing seat part of aircraft engine | |
| CN212857928U (en) | Milling cutter device for plate groove forming | |
| CN115673679A (en) | Technology for machining double key grooves of rotating wheel of mixed-flow horizontal water turbine | |
| CN113909826B (en) | Manufacturing method of cascade leaf profile | |
| CN216398187U (en) | Precision switching device for angle milling head and numerical control machine tool | |
| CN111975067B (en) | Horizontal double-head vertical movable milling device | |
| CN220944425U (en) | Flat bottom milling cutter grinding machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |