CN109746495B - Four-petal seat ring single-petal machining alignment process method - Google Patents
Four-petal seat ring single-petal machining alignment process method Download PDFInfo
- Publication number
- CN109746495B CN109746495B CN201910203251.2A CN201910203251A CN109746495B CN 109746495 B CN109746495 B CN 109746495B CN 201910203251 A CN201910203251 A CN 201910203251A CN 109746495 B CN109746495 B CN 109746495B
- Authority
- CN
- China
- Prior art keywords
- seat ring
- petal
- machining
- phi
- joint surface
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000003754 machining Methods 0.000 title claims abstract description 21
- 238000005259 measurement Methods 0.000 claims abstract description 6
- 238000003801 milling Methods 0.000 claims description 9
- 230000003746 surface roughness Effects 0.000 claims description 6
- 238000013102 re-test Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 241001595898 Monophlebidae Species 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006757 chemical reactions by type Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000004826 seaming Methods 0.000 description 1
Images
Landscapes
- Laser Beam Processing (AREA)
- Milling Processes (AREA)
Abstract
The invention discloses a process method for single-petal machining and alignment of a four-petal seat ring, which finishes the single-petal machining and alignment of the four-petal seat ring through the technical steps of single-petal marking detection, centering, alignment, rough machining, calculation and numerical control compensation, finish machining and accurate measurement. Meanwhile, the invention realizes the technical effect of ultra-precision machining by applying accurate measurement and matching with high-precision numerical control compensation, which cannot be realized by the conventional large-scale machining. The invention has the advantages of simple operation, high alignment precision, small accumulated error, small gap of the closed surface when the processed combined circle is ensured, and the like, can compress the production period and improve the processing quality.
Description
Technical Field
The invention relates to a technological method for processing and combining a multi-petal seat ring and a single petal, in particular to a technological method for completing processing and alignment of a four-petal seat ring and a single petal to realize full circle combination.
Background
The seat ring is a basic component of the reaction type generator, bears the pressure action and the concrete weight of the whole unit and unit section, and is required to have enough strength and rigidity. Meanwhile, the seat ring is used as one of key references in the installation of the generator set unit, and sufficient machining and assembling precision is required.
Generally, the seat ring has 3 structural modes according to the size and the split condition, namely: for a small-sized unit, an integral non-split design structure mode is adopted, and the maximum size of a seat ring is generally below 5 m; for a medium-sized unit, a 2-split design structure mode is adopted, and the maximum size of a seat ring is generally more than 5 meters and less than 8 meters; a4-segment design structure mode is adopted for large-scale units in consideration of the technological requirements of transportation, lifting and the like. With the continuous emergence of large-scale and giant-scale units, key parameters such as the diameter and the weight of a seat ring are linearly increased, and the seat ring of the water turbine has a 6-flap structure, but the structure is rare. In the process of combining the four-petal seat rings, the four-petal seat rings need to be grouped according to X-Y lines, one group is formed by two groups, the adjacent closing surfaces of the two petals are firstly processed, and then the two petal seat rings are combined into 1/2 circles to process the closing surfaces. This solution is mainly intended to avoid quality problems due to cumulative errors as far as possible, but with a significant increase in production difficulty and costs. In the prior art, a technological method for processing and aligning a large-sized water turbine seat ring (CN103612082A) refers to a seat ring processing and aligning scheme, particularly for a six-petal seat ring, but the scheme is still optimized and innovated on the basis of the traditional processing scheme, and a mode of grouping and combining processing of multi-petal seat rings is not avoided. Meanwhile, the final result of the scheme excessively depends on the precision of equipment, and the technical effect of ultra-precision machining cannot be achieved.
Therefore, there is a need to develop a process for aligning the four-petal seat ring single-petal machining, which can effectively control the accumulated machining error and the rounding precision in the seat ring factory can be higher than the standard requirement.
Disclosure of Invention
The invention aims to provide a process method for processing and aligning four-petal seat ring single petals, which can effectively control accumulated errors and ensure that the roundness precision in a seat ring factory is higher than the standard requirement.
The technical scheme of the invention is as follows: a process method for processing and aligning a single four-petal seat ring comprises the following steps: 1) correspondingly and rightly placing four 1/4 clack seat rings on a marking platform, and leveling a workpiece to be within 0.1mm by taking a horizontal center line A-A of a fixed guide vane as a reference; determining the center O-O of the workpiece by taking the inscribed circle phi 1 of the fixed guide vane as a reference; marking and checking the processing amount of the phi 2, phi 3, phi 4 and phi 5 circles by taking the central line O-O as a reference, marking a circle line and a flat line on the plane of the lower ring plate, determining the center of the circle, and marking;
2) placing an 1/4 petal seat ring on a boring machine workbench, leveling a workpiece to be within 0.3mm according to a flat line with a closing surface facing a machine tool spindle, and finding the closing surface to be within 0.3mm vertical to the machine tool spindle;
3) fixing a target ball of a laser tracker on a ram of a boring machine, moving the X axis of the boring machine to the center of a seat ring by phi 4 length of 1/2, checking the deviation between L1 and L2, and finely adjusting the seat ring in the circumferential direction to ensure that the deviation between L1 and L2 is less than or equal to 0.2 mm;
4) roughly milling an opening closing surface on one side of an 1/4 petal seat ring, and finishing the opening closing surface until the opening closing surface is flat, wherein the surface roughness is not higher than Ra3.2;
5) measuring the roughly milled joint surface by using a laser tracker, and checking the unevenness of the joint surface and the inclination of the joint surface relative to the earth level;
6) according to the measurement data, compensating by a numerical control program, and re-milling the joint surface to be flat, wherein the surface roughness is not higher than Ra3.2;
7) measuring the roughly milled joint surface by using a laser tracker for the second time, and checking the unevenness of the joint surface and the inclination of the joint surface relative to the earth level;
8) if the secondary retest data meet the conditions that the unevenness of the joint surface is less than 0.1mm and the inclination relative to the ground level is less than 0.05mm, carrying out 9) work; if not, repeating the steps 4), 5) and 6) until the product is qualified;
9) finish milling a closing surface on one side of the seat ring to a marking position;
10) rotating the seat ring in the horizontal direction by 90 degrees, enabling the second closed surface to face to the main shaft of the machine tool, leveling the workpiece to be within 0.1mm according to a flat line, and finding the closed surface to be within 0.1mm vertical to the main shaft of the machine tool;
11) an included angle between the surface A of the seat ring and the surface B α is obtained by using a laser tracker 1/4, an angle value of α included angle-90 degrees is obtained, and the processing amount of the surface B corresponding to the angle value is obtained by utilizing trigonometric function calculation;
12) repeating the steps of 3), 4), 5), 6), 7), 8) and 9), and finishing 1/4 flap seat ring processing and alignment work;
13) finishing the machining and alignment work of the rest three-petal seat rings according to the steps;
14) four 1/4 seat rings were made into a full circle on an A-A, O-O basis.
The technical effects are as follows:
the invention overcomes the technical mode that the traditional four-petal seat rings are pairwise assembled and then circularly repaired to form the plane of the closure, and saves the production cost and the period. Meanwhile, the machining accumulated error can be effectively controlled, the precision of the seat ring after being combined into a circle is ensured, the machining efficiency is improved, and the method is easy to popularize.
The concrete effects are as follows:
1) the invention has strong practicability and simple and convenient operation, is convenient for factory operators to use, can reduce multi-link periods such as assembly and the like, and effectively controls and even surpasses the precision of the traditional processing mode.
2) The invention adopts common tools and equipment in the hydropower industry, effectively controls the accumulated error, improves the precision and quality of the workpiece on the premise of saving the period and reducing the cost, and realizes the ultra-precision machining by matching high-precision measurement with precise numerical control compensation.
3) The invention is clearly and completely described in the claims for the technical solution of the alignment of the machining of the single four-petal ring, although it is a conventional arrangement in the field in a single context, but from the machining of the faces of the four-petal ring-shaped workpiece, all arrangements and arrangements have sufficient technical considerations and innovative contents. The invention has novel thought and easy conversion, and is referred to the processing of the four-petal-shaped parts (the top cover, the bottom ring, the control ring, the support cover and the like) of the large-scale water turbine ring.
Drawings
FIG. 1 is a schematic diagram of a four-petal seat ring marking inspection datum
FIG. 2 is a schematic drawing of a pull radius of a single-lobe seat ring apparatus
FIG. 3 is a schematic view of a single-lobe seating ring apparatus determining machining allowance
Detailed Description
The implementation of the invention comprises the following process steps: the process of applying the invention to carry out processing alignment and ensuring technical requirements is described by taking a four-petal seat ring of a certain large hydroelectric generating set as an example: the seat ring is designed to have four lobes, a weight of 187t, a height of 3127mm, and a maximum outer diameter of Φ 13920 mm. After the seaming surfaces are seamed, the local gap is not more than 0.15mm, and the depth is not more than 1/3 of the width of the contact area. The processing method is adopted for processing, and comprises the following steps:
1) correspondingly and rightly placing four 1/4 clack seat rings on a marking platform, and leveling a workpiece to be within 0.1mm by taking a horizontal center line A-A of a fixed guide vane as a reference; determining the center O-O of the workpiece by taking the inscribed circle phi 1 of the fixed guide vane as a reference; marking and checking the processing amount of the phi 2, phi 3, phi 4 and phi 5 circles by taking the central line O-O as a reference, marking a circle line and a flat line on the plane of the lower ring plate, determining the center of the circle, and marking;
2) placing an 1/4-petal seat ring on a boring machine workbench, leveling a workpiece to 0.2mm according to a flat line with a closing surface facing a machine tool spindle, and finding the closing surface to be perpendicular to the machine tool spindle by 0.3 mm;
3) fixing a target ball of a laser tracker on a ram of a boring machine, moving the X axis of the boring machine to the center of a seat ring by a length of 6960mm, checking the deviation between L1 and L2, and finely adjusting the seat ring in the circumferential direction to ensure that the deviation between L1 and L2 is less than or equal to 0.2 mm;
4) roughly milling an opening closing surface on one side of an 1/4 petal seat ring, and finishing the opening closing surface until the opening closing surface is flat, wherein the surface roughness is not higher than Ra3.2;
5) measuring the roughly milled joint surface by using a laser tracker, and checking the unevenness of the joint surface and the inclination of the joint surface relative to the earth level;
6) according to the measurement data, compensating by a numerical control program, and re-milling the joint surface to be flat, wherein the surface roughness is Ra3.2;
7) measuring the roughly milled joint surface by using a laser tracker for the second time, and checking the unevenness of the joint surface and the inclination of the joint surface relative to the earth level;
8) if the secondary retest data meet the conditions that the unevenness of the joint surface is less than 0.1mm and the inclination relative to the ground level is less than 0.05mm, carrying out 9) work; if not, repeating the steps 4), 5) and 6) until the product is qualified;
9) finish milling a closing surface on one side of the seat ring to a marking position;
10) rotating the seat ring in the horizontal direction by 90 degrees, enabling the second closed surface to face to the main shaft of the machine tool, leveling the workpiece to be within 0.1mm according to a flat line, and finding the closed surface to be within 0.1mm vertical to the main shaft of the machine tool;
11) an included angle between the surface A of the seat ring and the surface B α is obtained by using a laser tracker 1/4, an angle value of α included angle-90 degrees is obtained, and the processing amount of the surface B corresponding to the angle value is obtained by utilizing trigonometric function calculation;
12) repeating the steps of 3), 4), 5), 6), 7), 8) and 9), and finishing 1/4 flap seat ring processing and alignment work;
13) finishing the machining and alignment work of the rest three-petal seat rings according to the steps;
14) four 1/4 seat rings were made into a full circle on an A-A, O-O basis.
Claims (1)
1. A process method for processing and aligning a single four-petal seat ring is characterized by comprising the following steps: the method comprises the following steps:
1) correspondingly and rightly placing four 1/4 clack seat rings on a marking platform, and leveling a workpiece to be within 0.1mm by taking a horizontal center line A-A of a fixed guide vane as a reference; determining the center O-O of the workpiece by taking the inscribed circle phi 1 of the fixed guide vane as a reference; marking and checking the processing amount of the phi 2, phi 3, phi 4 and phi 5 circles by taking the central line O-O as a reference, marking a circle line and a flat line on the plane of the lower ring plate, determining the center of the circle, and marking;
2) placing an 1/4 petal seat ring on a boring machine workbench, leveling a workpiece to be within 0.3mm according to a flat line with a closing surface facing a machine tool spindle, and finding the closing surface to be within 0.3mm vertical to the machine tool spindle;
3) fixing a target ball of a laser tracker on a ram of a boring machine, moving the X axis of the boring machine to the center of a seat ring by phi 4 length of 1/2, checking the deviation between L1 and L2, and finely adjusting the seat ring in the circumferential direction to ensure that the deviation between L1 and L2 is less than or equal to 0.2 mm;
4) roughly milling an opening closing surface on one side of an 1/4 petal seat ring, and finishing the opening closing surface until the opening closing surface is flat, wherein the surface roughness is not higher than Ra3.2;
5) measuring the roughly milled joint surface by using a laser tracker, and checking the unevenness of the joint surface and the inclination of the joint surface relative to the earth level;
6) according to the measurement data, compensating by a numerical control program, and re-milling the joint surface to be flat, wherein the surface roughness is not higher than Ra3.2;
7) measuring the roughly milled joint surface by using a laser tracker for the second time, and checking the unevenness of the joint surface and the inclination of the joint surface relative to the earth level;
8) if the secondary retest data meet the conditions that the unevenness of the joint surface is less than 0.1mm and the inclination relative to the ground level is less than 0.05mm, carrying out the operation of the step 9); if not, repeating the step 4), the step 5) and the step 6) until the product is qualified;
9) finish milling a closing surface on one side of the seat ring to a marking position;
10) rotating the horizontal direction of the seat ring by 90 degrees, enabling the second closing surface to face to the main shaft of the machine tool, leveling the workpiece to be within 0.1mm according to a flat line, and finding the closing surface to be within 0.1mm vertical to the main shaft of the machine tool;
11) an included angle between the surface A of the seat ring and the surface B α is obtained by using a laser tracker 1/4, an angle value of α included angle-90 degrees is obtained, and the processing amount of the surface B corresponding to the angle value is obtained by utilizing trigonometric function calculation;
12) repeating the step 3), the step 4), the step 5), the step 6), the step 7), the step 8) and the step 9), and finishing 1/4 the processing and alignment of the valve seat ring;
13) finishing the machining and alignment work of the rest three-petal seat rings according to the steps;
14) four 1/4 seat rings were made into a full circle on an A-A, O-O basis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910203251.2A CN109746495B (en) | 2019-03-18 | 2019-03-18 | Four-petal seat ring single-petal machining alignment process method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910203251.2A CN109746495B (en) | 2019-03-18 | 2019-03-18 | Four-petal seat ring single-petal machining alignment process method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109746495A CN109746495A (en) | 2019-05-14 |
| CN109746495B true CN109746495B (en) | 2020-04-14 |
Family
ID=66408860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910203251.2A Active CN109746495B (en) | 2019-03-18 | 2019-03-18 | Four-petal seat ring single-petal machining alignment process method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109746495B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112935727B (en) * | 2021-02-05 | 2023-05-02 | 一重集团(黑龙江)重工有限公司 | Split type lower ring machining method |
| CN115741237A (en) * | 2022-11-10 | 2023-03-07 | 中国航发沈阳黎明航空发动机有限责任公司 | Automatic alignment method for machining split case joint surface |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001234878A (en) * | 2000-02-21 | 2001-08-31 | Kimie Nakamura | Scroll fluid machine |
| KR100934452B1 (en) * | 2009-05-11 | 2009-12-29 | 원일봉 | Chamfering device of circular section material |
| CN102689074A (en) * | 2012-06-04 | 2012-09-26 | 中国石油化工股份有限公司 | Plug-in type flexible contact pattern cutting track for spherical shell plate, and alignment device and method |
| CN103612082A (en) * | 2013-11-22 | 2014-03-05 | 哈尔滨电机厂有限责任公司 | Large water turbine stay ring machining and centering method |
| CN105328398A (en) * | 2015-11-10 | 2016-02-17 | 中信重工机械股份有限公司 | Method for machining three-section barrel combined faces of large mill |
| CN105945483A (en) * | 2016-06-20 | 2016-09-21 | 哈尔滨电机厂有限责任公司 | Before-welding adjustment and alignment process for positioning ribs of turbine generator |
| CN106181259A (en) * | 2016-08-15 | 2016-12-07 | 哈尔滨电机厂有限责任公司 | Big high size list upper ring plate split-type seat ring building site processing method |
-
2019
- 2019-03-18 CN CN201910203251.2A patent/CN109746495B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001234878A (en) * | 2000-02-21 | 2001-08-31 | Kimie Nakamura | Scroll fluid machine |
| KR100934452B1 (en) * | 2009-05-11 | 2009-12-29 | 원일봉 | Chamfering device of circular section material |
| CN102689074A (en) * | 2012-06-04 | 2012-09-26 | 中国石油化工股份有限公司 | Plug-in type flexible contact pattern cutting track for spherical shell plate, and alignment device and method |
| CN103612082A (en) * | 2013-11-22 | 2014-03-05 | 哈尔滨电机厂有限责任公司 | Large water turbine stay ring machining and centering method |
| CN105328398A (en) * | 2015-11-10 | 2016-02-17 | 中信重工机械股份有限公司 | Method for machining three-section barrel combined faces of large mill |
| CN105945483A (en) * | 2016-06-20 | 2016-09-21 | 哈尔滨电机厂有限责任公司 | Before-welding adjustment and alignment process for positioning ribs of turbine generator |
| CN106181259A (en) * | 2016-08-15 | 2016-12-07 | 哈尔滨电机厂有限责任公司 | Big high size list upper ring plate split-type seat ring building site processing method |
Non-Patent Citations (2)
| Title |
|---|
| 溪洛渡超大型座环厂内加工工艺分析;娄国彬;《电站系统工程》;20120715;第74-75页 * |
| 金沙江向家坝座环加工工艺研究;翟志顺;《锅炉制造》;20100915;第54-56页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109746495A (en) | 2019-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102519404B (en) | Measurement and correction method of flatness of large-diameter flange plane | |
| CN109746495B (en) | Four-petal seat ring single-petal machining alignment process method | |
| CN113369997B (en) | Numerical control machine tool swing angle precision checking method | |
| CN102554701A (en) | Method and device for compensating indexing error of machine tool | |
| CN109396952B (en) | Method for detecting precision of numerical control machine tool by means of special tool | |
| CN109909679B (en) | Method for improving split seat ring opening precision | |
| CN104908886A (en) | Installation method for energy-saving fin keel of ship | |
| CN110193708B (en) | Method for machining ultra-large-diameter multi-section type gear ring | |
| CN105328398A (en) | Method for machining three-section barrel combined faces of large mill | |
| CN103612082B (en) | The process of large-sized water turbine field ring processing centering | |
| CN113601119B (en) | Machining method for high-power diesel engine camshaft | |
| CN109513947A (en) | A kind of processing technology of the large-sized flange with conical surface sealing structure | |
| CN117128859A (en) | Three-dimensional measurement indexing processing method for top cover or bottom ring guide vane shaft hole of water turbine | |
| CN112719798B (en) | High-precision wind power middle box body and processing technology thereof | |
| CN113953763B (en) | Technological method for machining spindle connecting hole of repair spindle of hydropower station | |
| CN112360582B (en) | High-medium-pressure non-dummy shaft final assembly method for remanufacturing unit | |
| CN115781413A (en) | Method for detecting consistency error of machining accuracy of automated production line equipment | |
| CN112720075A (en) | On-site circle center alignment machining process of large flange | |
| CN111375992B (en) | Manufacturing method of large efficient steering oar shell | |
| CN112605611A (en) | Gear box machining method for turbine | |
| CN115673689B (en) | Hydraulic self-centering micron-scale precision mechanical manufacturing method for large-scale shaft long rotor | |
| CN110814363B (en) | Method for processing crankshaft balance fan plate | |
| CN202498372U (en) | Square-box-type lathe clamp with double center distances | |
| CN115157009B (en) | Method for finding verticality of bearing seat of gas turbine | |
| CN119077301A (en) | A method for processing and manufacturing large impact wheel hub forgings |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |