CN114102049A - Machining method for actually matching machined pin hole of inner cylinder with identical pin hole of outer cylinder - Google Patents
Machining method for actually matching machined pin hole of inner cylinder with identical pin hole of outer cylinder Download PDFInfo
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- CN114102049A CN114102049A CN202111457102.2A CN202111457102A CN114102049A CN 114102049 A CN114102049 A CN 114102049A CN 202111457102 A CN202111457102 A CN 202111457102A CN 114102049 A CN114102049 A CN 114102049A
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- pin hole
- pin
- outer cylinder
- inner cylinder
- lower half
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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
- B23P13/00—Making metal objects by operations essentially involving machining but not covered by a single other subclass
- B23P13/02—Making metal objects by operations essentially involving machining but not covered by a single other subclass in which only the machining operations are important
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/22—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring existing or desired position of tool or work
Abstract
A processing method for actually matching an inner cylinder processed pin hole with an outer cylinder homothetic pin hole aims to solve the technical problem that the existing processing method is difficult to be suitable for processing the outer cylinder pin hole according to the homothetic processed pin hole when the inner cylinder pin hole is processed. The processing method comprises the following steps: firstly, trial assembly and alignment of an inner cylinder and an outer cylinder; secondly, fixing an auxiliary pin sleeve; thirdly, an alignment bolt is arranged in a pin hole of the auxiliary pin sleeve, a milling machine is used for making a table according to the excircle of the alignment bolt, and the deviation between the center of a main shaft of the alignment milling machine and the center of the bolt is within 0.03 mm; fourthly, processing a pin hole on the boss of the lower half of the outer cylinder, and reserving allowance on one side of the pin hole; fifthly, trial assembling the inner cylinder and the outer cylinder and determining pin hole deviation; sixthly, an alignment pin is arranged on the lower half of the outer cylinder, so that the deviation between the center of the alignment main shaft and the center of the alignment pin is within 0.03 mm; and seventhly, processing the pin hole to the final size. The invention ensures the accuracy of the outer cylinder in actually matching the position and direction of the processed pin hole according to the processed pin hole of the inner cylinder, and does not influence the size of the processed pin hole.
Description
Technical Field
The invention relates to a method for processing pin holes in the same position of an inner cylinder and an outer cylinder of a steam turbine.
Background
The existing method for machining the positioning pin holes at the bottoms of the inner cylinder and the outer cylinder of a certain type of steam turbine by adopting a method of drilling and reaming the inner cylinder and the outer cylinder after assembling and aligning can ensure the consistency of the pin holes of the inner cylinder and the outer cylinder of the steam turbine, but the method lacks interchangeability for products of different batches; it is difficult to apply to the case where the outer cylinder pin hole is machined in the same position as the machined pin hole at the time when the inner cylinder pin hole is machined.
Therefore, a method for machining an outer cylinder pin hole in a steam turbine in a same-position mode through machined pin holes is needed to be developed.
Disclosure of Invention
The invention provides a processing method for matching an inner cylinder processed pin hole with an outer cylinder co-located pin hole in an actual manner, aiming at solving the technical problem that the existing processing method is difficult to be suitable for processing the outer cylinder pin hole according to the processed pin hole in the co-located manner when the inner cylinder pin hole is processed.
The processing method for actually matching the processed pin hole of the inner cylinder with the identical-position pin hole of the outer cylinder is realized according to the following steps:
first, trial assembly and alignment of inner and outer cylinders
Mounting the lower half of the outer cylinder on an assembly table, wherein the horizontal middle plane of the lower half of the outer cylinder faces upwards, then sequentially mounting an auxiliary pin bush and the lower half of the inner cylinder, and aligning the centers of the lower half of the inner cylinder and the lower half of the outer cylinder within 0.03 mm;
second, fixing of auxiliary pin bush
The auxiliary pin bush is welded and fixed on a boss where the lower half pin hole of the outer cylinder is located in the alignment state of the lower half of the outer cylinder and the lower half of the inner cylinder, and the fixing of the auxiliary pin bush is completed;
thirdly, aligning the position and direction of the pin hole
The lower half of the inner cylinder is disassembled, an alignment bolt is arranged in a pin hole of the auxiliary pin sleeve, a milling machine is used for making a table according to the excircle of the alignment bolt, and the deviation between the center of a main shaft of the alignment milling machine and the center of the bolt is within 0.03 mm;
fourthly, allowance processing pin hole
Processing a pin hole on the boss of the lower half of the outer cylinder according to the aligned angle and position in the step three, reserving allowance on one side of the pin hole, and matching a step pin and an alignment pin according to the size of the processed pin hole;
fifthly, trial assembly of the inner cylinder and the outer cylinder and determination of pin hole deviation
Mounting the lower half of the outer cylinder on an assembly table, wherein the horizontal middle plane of the lower half of the outer cylinder faces upwards, then sequentially mounting a step pin and the lower half of the inner cylinder, and measuring the central deviation data of the lower half of the inner cylinder and the lower half of the outer cylinder to obtain the central deviation size and direction of a pin hole;
sixthly, the position and the direction of the pin hole are aligned again
Detaching the lower half of the inner cylinder, installing an alignment pin on the lower half of the outer cylinder, using a milling machine to make a table according to the excircle of the alignment pin, so that the deviation between the center of the alignment main shaft and the center of the alignment pin is within 0.03mm, and adjusting the position and the direction of the pin hole according to the deviation size and the direction of the center of the pin hole fed back in the step five;
seventhly, processing the pin hole to the final size
And (4) reaming and reaming the pin holes to the final size according to the position and direction of the pin hole adjustment in the step six, and finishing the machining method of actually matching the machined pin holes of the inner cylinder with the co-located pin holes of the outer cylinder.
The processing method for the inner cylinder processed pin hole real matching outer cylinder co-located pin hole is characterized in that a special auxiliary alignment tool is designed, a method for aligning and calibrating the position and the direction of the pin hole for multiple times is adopted, the processing method for the inner cylinder processed pin hole real matching outer cylinder co-located pin hole is verified to be correct and feasible through the engineering real matching processing of the inner cylinder and the outer cylinder stage changing co-located pin hole, the accuracy of the outer cylinder in real matching processing of the position and the direction of the pin hole according to the inner cylinder processed pin hole is guaranteed, the size of the processed pin hole is not affected, and the requirement of inner and outer cylinder interchange assembly is met.
Drawings
FIG. 1 is a schematic structural diagram of trial assembly and alignment of inner and outer cylinders in step one of the embodiments;
FIG. 2 is a schematic structural view of the auxiliary pin bushing fixed in step two in the embodiment;
FIG. 3 is a schematic structural view of pin hole position and direction alignment in step three of the embodiment;
FIG. 4 is a schematic structural view of pin hole processing in step four of the example;
FIG. 5 is a schematic structural diagram of the trial assembly of the inner cylinder and the outer cylinder in step five of the embodiment;
FIG. 6 is a schematic structural view of the realignment of the position and direction of the six pin holes in the step of the embodiment;
FIG. 7 is a schematic structural diagram of pin hole machining in the seventh step in the example.
Detailed Description
The first embodiment is as follows: the method for machining the machined pin hole of the inner cylinder and the matched pin hole of the outer cylinder in the embodiment is implemented according to the following steps:
first, trial assembly and alignment of inner and outer cylinders
Mounting the lower half 1 of the outer cylinder on an assembly table, wherein the horizontal middle plane is upward, then sequentially mounting an auxiliary pin sleeve 3 and the lower half 2 of the inner cylinder, and aligning the centers of the lower half 2 of the inner cylinder and the lower half 1 of the outer cylinder within 0.03 mm;
second, fixing of auxiliary pin bush
The auxiliary pin bush 3 is welded and fixed on a boss where a pin hole of the lower half 1 of the outer cylinder is located under the alignment state of the lower half 1 of the outer cylinder and the lower half 2 of the inner cylinder, and the fixing of the auxiliary pin bush is completed;
thirdly, aligning the position and direction of the pin hole
The lower half 2 of the inner cylinder is disassembled, an alignment bolt 4 is arranged in a pin hole of the auxiliary pin sleeve 3, a milling machine is used for drawing a table according to the excircle of the alignment bolt, and the deviation between the center of a main shaft of the alignment milling machine and the center of the bolt is within 0.03 mm;
fourthly, allowance processing pin hole
Processing a pin hole on the boss of the lower half 1 of the outer cylinder according to the aligned angle and position in the step three, reserving allowance on one side of the pin hole, and matching a step pin 5 and an alignment pin 6 according to the size of the processed pin hole;
fifthly, trial assembly of the inner cylinder and the outer cylinder and determination of pin hole deviation
Mounting the lower half 1 of the outer cylinder on an assembly table, wherein the horizontal middle plane is upward, then sequentially mounting a step pin 5 and the lower half 2 of the inner cylinder, and measuring the central deviation data of the lower half 2 of the inner cylinder and the lower half 1 of the outer cylinder to obtain the central deviation size and direction of a pin hole;
sixthly, the position and the direction of the pin hole are aligned again
Detaching the lower half 2 of the inner cylinder, installing an alignment pin 6 on the lower half 1 of the outer cylinder, using a milling machine to make a table according to the excircle of the alignment pin, so that the deviation between the center of the alignment main shaft and the center of the alignment pin is within 0.03mm, and adjusting the position and the direction of the pin hole according to the deviation size and the direction of the center of the pin hole fed back in the step five;
seventhly, processing the pin hole to the final size
And (4) reaming and reaming the pin holes to the final size according to the position and direction of the pin hole adjustment in the step six, and finishing the machining method of actually matching the machined pin holes of the inner cylinder with the co-located pin holes of the outer cylinder.
The second embodiment is as follows: the difference between the present embodiment and the first embodiment is that the auxiliary pin bushing 3 in the first step includes a bottom plate 3-1 and a pin seat 3-2, the cylindrical pin seat 3-2 is disposed on the bottom plate 3-1, and a pin hole is formed in the pin seat 3-2.
The third concrete implementation mode: the difference between the second embodiment and the first or second embodiment is that in the second step, the auxiliary pin sleeve 3 is fixed on the boss where the pin hole of the lower half 1 of the outer cylinder is located by spot welding.
The fourth concrete implementation mode: the difference between this embodiment and one of the first to third embodiments is that the margin of 2mm is left on one side of the pin hole in the fourth step.
The fifth concrete implementation mode: the difference between this embodiment and one of the first to fourth embodiments is that the tolerance of the pin hole machined in the allowance in step four is consistent with the tolerance of the final pin hole.
Example (b): the machining method for actually matching the machined pin hole of the inner cylinder with the identical pin hole of the outer cylinder in the embodiment is implemented according to the following steps:
first, trial assembly and alignment of inner and outer cylinders
Mounting the lower half 1 of the outer cylinder on an assembly table, aligning the lower half with an upward horizontal split surface within 0.05mm according to the processed split surface and the inner hole of the bearing, then sequentially mounting an auxiliary pin sleeve 3 and the lower half 2 of the inner cylinder, and aligning the centers of the lower half 2 of the inner cylinder and the lower half 1 of the outer cylinder within 0.03 mm;
second, fixing of auxiliary pin bush
Under the alignment state of the lower half 1 of the outer cylinder and the lower half 2 of the inner cylinder, the auxiliary pin sleeve 3 is fixed on a boss where a pin hole of the lower half 1 of the outer cylinder is located in a spot welding manner, so that the auxiliary pin sleeve is fixed;
thirdly, aligning the position and direction of the pin hole
The lower half 2 of the inner cylinder is disassembled, an alignment bolt 4 is arranged in a pin hole of the auxiliary pin sleeve 3, a milling machine is used for drawing a table according to the excircle of the alignment bolt, and the deviation between the center of a main shaft of the alignment milling machine and the center of the bolt is within 0.03 mm;
fourthly, allowance processing pin hole
Processing a pin hole on the boss of the lower half 1 of the outer cylinder according to the aligned angle and position in the step three, reserving 2mm allowance on one side of the pin hole, and matching a step pin 5 and an alignment pin 6 according to the size of the processed pin hole;
fifthly, trial assembly of the inner cylinder and the outer cylinder and determination of pin hole deviation
Mounting the lower half 1 of the outer cylinder on an assembly table, wherein the horizontal middle plane is upward, then sequentially mounting a step pin 5 and the lower half 2 of the inner cylinder, and measuring the central deviation data of the lower half 2 of the inner cylinder and the lower half 1 of the outer cylinder to obtain the central deviation size and direction of a pin hole;
sixthly, the position and the direction of the pin hole are aligned again
Detaching the lower half 2 of the inner cylinder, installing an alignment pin on the lower half 1 of the outer cylinder, using a milling machine to make a table according to the excircle of the alignment pin, so that the deviation between the center of the alignment main shaft and the center of the alignment pin is within 0.03mm, and adjusting the position and the direction of the pin hole according to the deviation size and the direction of the center of the pin hole fed back in the step five;
seventhly, processing the pin hole to the final size
And (4) reaming and reaming the pin holes to the final size according to the position and direction of the pin hole adjustment in the step six, and finishing the machining method of actually matching the machined pin holes of the inner cylinder with the co-located pin holes of the outer cylinder.
The machining method for actually matching the machined pin hole of the inner cylinder with the identical-position pin hole of the outer cylinder completes the machining of the actually matched pin hole of the outer cylinder for the machined pin hole of the inner cylinder, the machined pin hole is accurate in size, the inner cylinder and the outer cylinder are accurately positioned during assembling, and the requirements of the center and the through flow of a unit are met.
Claims (5)
1. The machining method for actually matching the machined pin hole of the inner cylinder with the identical pin hole of the outer cylinder is characterized by comprising the following steps of:
first, trial assembly and alignment of inner and outer cylinders
Mounting the lower half (1) of the outer cylinder on an assembly table, wherein the horizontal middle plane is upward, then sequentially mounting an auxiliary pin bush (3) and the lower half (2) of the inner cylinder, and aligning the centers of the lower half (2) of the inner cylinder and the lower half (1) of the outer cylinder within 0.03 mm;
second, fixing of auxiliary pin bush
The auxiliary pin bush (3) is welded and fixed on a boss where a pin hole of the lower half (1) of the outer cylinder is located under the alignment state of the lower half (1) of the outer cylinder and the lower half (2) of the inner cylinder, and the fixation of the auxiliary pin bush is completed;
thirdly, aligning the position and direction of the pin hole
The lower half (2) of the inner cylinder is disassembled, an alignment bolt (4) is arranged in a pin hole of the auxiliary pin sleeve (3), a milling machine is used for making a table according to the excircle of the alignment bolt, and the deviation between the center of a main shaft of the alignment milling machine and the center of the bolt is within 0.03 mm;
fourthly, allowance processing pin hole
Processing a pin hole on the boss of the lower half (1) of the outer cylinder according to the aligned angle and position in the third step, leaving allowance on one side of the pin hole, and matching a step pin (5) and an alignment pin (6) according to the size of the processed pin hole;
fifthly, trial assembly of the inner cylinder and the outer cylinder and determination of pin hole deviation
The lower half (1) of the outer cylinder is arranged on an assembly table, the horizontal middle plane is upward, then a step pin (5) and the lower half (2) of the inner cylinder are sequentially arranged, the central deviation data of the lower half (2) of the inner cylinder and the lower half (1) of the outer cylinder are measured, and the central deviation size and direction of a pin hole are obtained;
sixthly, the position and the direction of the pin hole are aligned again
Detaching the lower half (2) of the inner cylinder, installing an alignment pin (6) on the lower half (1) of the outer cylinder, using a milling machine to perform table making according to the excircle of the alignment pin, enabling the deviation between the center of an alignment main shaft and the center of the alignment pin to be within 0.03mm, and adjusting the position and the direction of a pin hole according to the deviation size and the direction of the center of the pin hole fed back in the step five;
seventhly, processing the pin hole to the final size
And (4) reaming and reaming the pin holes to the final size according to the position and direction of the pin hole adjustment in the step six, and finishing the machining method of actually matching the machined pin holes of the inner cylinder with the co-located pin holes of the outer cylinder.
2. The method for machining the pin hole of the inner cylinder with the pin hole of the outer cylinder in the same position as the machined pin hole of the inner cylinder in the claim 1 is characterized in that the auxiliary pin sleeve (3) in the step one comprises a bottom plate (3-1) and a pin seat (3-2), the cylindrical pin seat (3-2) is arranged on the bottom plate (3-1), and the pin hole is formed in the pin seat (3-2).
3. The method for machining the pin hole of the inner cylinder with the pin hole of the outer cylinder in the same position as the machined pin hole of the inner cylinder according to the claim 1, wherein in the step two, the auxiliary pin sleeve (3) is fixed on a boss where the pin hole of the lower half (1) of the outer cylinder is located through spot welding.
4. The method for machining the pin hole of the inner cylinder with the pin hole of the outer cylinder in the same position as the machined pin hole of the inner cylinder according to claim 1, wherein a 2mm allowance is left on one side of the pin hole in the four steps.
5. The method for machining the pin hole of the inner cylinder matched with the pin hole of the outer cylinder in the same position as the machined pin hole of the inner cylinder according to claim 1, wherein the tolerance of the pin hole machined in the allowance in the step four is consistent with the tolerance of the final pin hole.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111457102.2A CN114102049B (en) | 2021-12-01 | 2021-12-01 | Machining method for actually matching machined pin hole of inner cylinder with identical pin hole of outer cylinder |
| PCT/CN2022/111655 WO2023098138A1 (en) | 2021-12-01 | 2022-08-11 | Machining method for same-position pin hole of outer cylinder actually matching machined pin hole of inner cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111457102.2A CN114102049B (en) | 2021-12-01 | 2021-12-01 | Machining method for actually matching machined pin hole of inner cylinder with identical pin hole of outer cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114102049A true CN114102049A (en) | 2022-03-01 |
| CN114102049B CN114102049B (en) | 2023-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111457102.2A Active CN114102049B (en) | 2021-12-01 | 2021-12-01 | Machining method for actually matching machined pin hole of inner cylinder with identical pin hole of outer cylinder |
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| CN (1) | CN114102049B (en) |
| WO (1) | WO2023098138A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023098138A1 (en) * | 2021-12-01 | 2023-06-08 | 哈尔滨汽轮机厂有限责任公司 | Machining method for same-position pin hole of outer cylinder actually matching machined pin hole of inner cylinder |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202170814U (en) * | 2011-07-09 | 2012-03-21 | 潍坊雷诺特动力设备有限公司 | Double-cylinder type cylinder of steam power device |
| CN205551982U (en) * | 2016-04-22 | 2016-09-07 | 中国石油集团济柴动力总厂 | Internal -combustion engine cylinder body pinhole is joined in marriage and is made system of processing |
| CN107905853A (en) * | 2017-12-05 | 2018-04-13 | 上海电气电站设备有限公司 | Turbine Steam cylinder structure |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3745727B2 (en) * | 2002-11-11 | 2006-02-15 | 川崎重工業株式会社 | Turbine casing positioning mechanism |
| CN109746651A (en) * | 2019-03-18 | 2019-05-14 | 哈尔滨电机厂有限责任公司 | A kind of generator pit and end cap pin hole are the same as the processing method that drills and reams |
| CN110985144A (en) * | 2019-12-30 | 2020-04-10 | 上海汽轮机厂有限公司 | Steam inlet structure of steam turbine |
| CN114102049B (en) * | 2021-12-01 | 2023-03-14 | 哈尔滨汽轮机厂有限责任公司 | Machining method for actually matching machined pin hole of inner cylinder with identical pin hole of outer cylinder |
-
2021
- 2021-12-01 CN CN202111457102.2A patent/CN114102049B/en active Active
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2022
- 2022-08-11 WO PCT/CN2022/111655 patent/WO2023098138A1/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202170814U (en) * | 2011-07-09 | 2012-03-21 | 潍坊雷诺特动力设备有限公司 | Double-cylinder type cylinder of steam power device |
| CN205551982U (en) * | 2016-04-22 | 2016-09-07 | 中国石油集团济柴动力总厂 | Internal -combustion engine cylinder body pinhole is joined in marriage and is made system of processing |
| CN107905853A (en) * | 2017-12-05 | 2018-04-13 | 上海电气电站设备有限公司 | Turbine Steam cylinder structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023098138A1 (en) * | 2021-12-01 | 2023-06-08 | 哈尔滨汽轮机厂有限责任公司 | Machining method for same-position pin hole of outer cylinder actually matching machined pin hole of inner cylinder |
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| Publication number | Publication date |
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| WO2023098138A1 (en) | 2023-06-08 |
| CN114102049B (en) | 2023-03-14 |
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Effective date of registration: 20230106 Address after: 150000 building 3, high tech production base, Nangang District, Harbin City, Heilongjiang Province Applicant after: HARBIN TURBINE Co.,Ltd. Applicant after: HADIAN POWER EQUIPMENT NATIONAL ENGINEERING RESEARCH CENTER CO.,LTD. Address before: 150046 No. three power road 345, Xiangfang District, Heilongjiang, Harbin Applicant before: HARBIN TURBINE Co.,Ltd. |
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