CN112059562A - Production process of moving blade without crown - Google Patents
Production process of moving blade without crown Download PDFInfo
- Publication number
- CN112059562A CN112059562A CN202010903313.3A CN202010903313A CN112059562A CN 112059562 A CN112059562 A CN 112059562A CN 202010903313 A CN202010903313 A CN 202010903313A CN 112059562 A CN112059562 A CN 112059562A
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- China
- Prior art keywords
- blade
- root
- crown
- blade root
- milling
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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
- B23P15/02—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine or like blades from one piece
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention discloses a production process of moving blades without a crown, which comprises the following steps: s1, arranging a process head at the tail end of a blade body on a blade, arranging an auxiliary thimble hole on the central line of the process head, wherein the central line of the auxiliary thimble hole and the central line of a blade root on the blade are on the same central line, S2, fixing the blade on a tool clamp on a four-axis milling machine tool, wherein the tool clamp comprises a blade root positioning seat and a thimble seat, fixing the blade and the tool clamp, A, fixing the blade root and the blade root positioning seat of the blade, wherein the radial assembly surface of the blade root on the blade and a steam passage of the blade body on the blade are on the same reference line, B, the method comprises the steps of jacking an auxiliary thimble hole on a thimble seat, S3, constructing a three-dimensional blade model according to the shape of the blade, S4, and formulating a blade rotary milling processing scheme.
Description
The technical field is as follows:
the invention relates to the technical field of blade production, in particular to a production process of a moving blade without a crown.
Background art:
a steam turbine is a rotary power machine that converts the energy of steam into mechanical work, and is also called a steam turbine. The steam turbine is mainly used as a prime mover for power generation, can directly drive various pumps, fans, compressors, ship propellers and the like, and can meet the heat supply requirements in production and life by utilizing the exhaust steam or intermediate extraction steam of the steam turbine. The steam turbine is mainly applied to the fields of electric power industry, ship industry, cement, chemical industry, petroleum, metallurgy, heavy machinery and the like.
Along with the increase of the application field of the steam turbine, the production varieties of corresponding steam turbine moving blades are more and more, and the moving blades without shrouds are used for meeting the requirements of different occasions.
In the prior art, most of installation modes of a moving blade and a turbine wheel groove are that after a round pin hole at the blade root position on the blade is to be installed in a wheel groove on a turbine, the tight fit state of the blade root position and the turbine wheel groove is adjusted through a thickening piece and a thinning piece, drilling and reaming are carried out, and a round pin is installed to fix each moving blade.
The invention content is as follows:
the object of the present invention is to provide a process for the production of rotor blades without a shroud, which solves one or more of the above-mentioned problems of the prior art.
In order to solve the technical problems, the invention provides a production process of moving blades without a crown, which has the innovation points that: the method comprises the following steps:
s1, arranging a process head at the tail end of the blade body on the blade, arranging an auxiliary thimble hole on the center line of the process head, and enabling the auxiliary thimble hole and the center line of the blade root on the blade to be on the same center line.
S2, the blade is fixed on a tool fixture on the four-axis milling machine tool, the tool fixture comprises a blade root positioning seat and a thimble seat, and the blade and the tool fixture are fixed.
A. And fixing the blade root and the blade root positioning seat of the blade, wherein the radial assembly surface of the blade root on the blade and the steam passage of the blade body on the blade are on the same datum line.
B. The auxiliary thimble hole is propped against the thimble seat.
And S3, constructing a blade three-dimensional model according to the blade shape.
And S4, making a blade rotary milling processing scheme.
Further, the blade rotary milling processing scheme comprises the following steps:
a. and carrying out rough milling processing on the blade root on the blade on a four-axis milling machine tool.
b. And (4) carrying out coarse and fine milling on the blade body on the blade on a four-axis milling machine tool.
c. And carrying out finish milling on the blade root on the blade on a six-axis milling machine tool.
d. And polishing the upper blade body of the blade.
e. And (5) checking and accepting the leaves.
f. And removing the process head after acceptance inspection is qualified.
Further, in the step a, a plurality of wheel groove cutters with the same size are adopted to carry out rough milling on the blade root on the blade, and space rings are separated among the wheel groove cutters.
Furthermore, the wheel groove cutters are formed by repeatedly grinding the cutter through a cutter grinding machine.
Further, the space ring is formed by multiple times of grinding through a surface grinder.
Further, in the step e, the blade acceptance is measured through blade upper blade profile measurement, blade weighing, blade sequencing and blade running frequency measurement.
Further, the blade upper blade body profile is measured by adopting a frame type profile measuring tool to measure the profile.
The invention has the beneficial effects that:
1. the invention provides a production process of moving blades without shrouds, wherein when the blade root of each blade is fixed with a blade root positioning seat, the radial assembly surface of the blade root and a steam passage of a blade body on the blade are ensured to be on the same datum line, so that the subsequent radial assembly surface of the blade root on the blade and a steam turbine are ensured to be installed, and the air passage in a cantilever state on the steam turbine cannot droop below the radial assembly surface of the blade root on the blade or move upwards above the radial assembly surface of the blade root on the blade, so that the installation accuracy of the blade and the steam turbine is improved.
2. The invention provides a production process of moving blades without shrouds, wherein the machining consistency of blade root grooves on blades is ensured by machining blade roots on the blades through a plurality of wheel groove cutters with consistent sizes, and meanwhile, the machining precision requirement of the blade root grooves on the blades is improved by repeatedly grinding the wheel groove cutters and a spacing ring, so that the interference and the clearance of the final binding surfaces of the blade roots and the wheel grooves can meet the expected precision requirement after the blade roots on the blades and the wheel grooves on a steam turbine are assembled, and the assembly precision of the blade root positions on the blades and the wheel grooves on the steam turbine is further ensured.
Description of the drawings:
FIG. 1 is a plan view of the blade of the present invention after it has been formed.
The specific implementation mode is as follows:
for the purpose of enhancing the understanding of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
Fig. 1 shows an embodiment of the present invention, which includes the following steps:
s1, arranging a craft head at the tail end of the blade body on the blade 101, arranging an auxiliary thimble hole on the center line of the craft head, and enabling the auxiliary thimble hole and the center line of the blade root on the blade 101 to be on the same center line.
S2, the blade 101 is fixed on a tool fixture on a four-axis milling machine tool, the tool fixture comprises a blade root positioning seat and a pin boss, and the blade 101 and the tool fixture are fixed.
A. And fixing the blade root and the blade root positioning seat of the blade 101, wherein the radial assembling surface of the blade root on the blade 101 and the steam passage of the blade body on the blade 101 are on the same datum line.
B. The auxiliary thimble hole is propped against the thimble seat.
And S3, constructing a three-dimensional model of the blade 101 according to the shape of the blade 101.
And S4, making a blade 101 rotary milling processing scheme.
The blade body without the shroud moving blade is longer and has a very long air passage, in the invention, when the blade 101 is processed, the blade 101 is clamped between the blade root positioning seat and the ejector seat by the tool fixture for processing, namely, the blade 101 is clamped and pressed in a manner of clamping one top, so that the processing stability of the blade 101 is improved, wherein when the blade root of the blade 101 is fixed with the blade root positioning seat, the radial assembling surface of the blade root and the steam passage of the blade body on the blade 101 are ensured to be on the same datum line, and further, after the subsequent blade root radial assembling surface on the blade 101 and a steam turbine are installed, the air passage in a cantilever state on the steam turbine cannot droop below the blade root radial assembling surface on the blade 101 or move upwards above the blade root radial assembling surface on the blade 101, so that the installation accuracy of the blade 101 and the steam turbine is improved.
In the invention, with reference to patent No. 201310448004.1 with the patent name of four-axis milling movable and stationary blade positioning seat tooling fixture, the blade root position of the blade 101 and the blade root positioning seat are fixed specifically as follows: install the blade root position of blade 101 in the position of blade mount pad 5, the bottom in blade root position is contradicted on the circular arc lug, through the position of adjusting locating pin 7 protrusion baffle 11, thereby adjust the mounted position of blade root position on blade mount pad 5, during specific regulation, adjust the datum line of blade body air flue on blade 101 to be on same water flat line with cylinder locating pin 4, afterwards, through clamp plate 6 with the blade root position of blade 101 at the rigidity of blade mount pad 5, the above-mentioned process is the blade root position of blade 101 with blade root positioning seat fixed process.
In the present invention, the above-mentioned blade 101 rotary milling processing scheme includes the following steps:
a. and roughly milling the blade root on the blade 101 on a four-shaft milling machine tool.
b. And (3) carrying out coarse and fine milling on the blade body of the blade 101 on a four-axis milling machine tool.
c. And carrying out finish milling on the blade root of the blade 101 on a six-axis milling machine tool.
d. The blade body of the blade 101 is polished.
e. The leaves 101 are accepted.
f. And removing the process head after acceptance inspection is qualified.
In the invention, the removal process head is arranged after the blade 101 is accepted, and when the blade 101 is not accepted, the unqualified blade 101 can still be further calibrated by using the process head.
In the present invention, in the step a, a plurality of wheel groove cutters with the same size are used for rough milling of the blade root on the blade 101, and space rings are separated among the wheel groove cutters, in other embodiments of the present invention, the number of the wheel groove cutters is 2, and the number of the space rings is 1.
In the invention, the machining of the blade root on the blade 101 by the wheel groove cutter with the same size ensures the machining consistency of the blade root groove on the blade 101, thereby ensuring the installation stability of the steam turbines at the blade root of the blade 101.
In other embodiments of the invention, the wheel groove cutters can be repeatedly ground by other grinding tools, the grinding precision of the wheel groove cutters is realized after the positions of the blade roots on the blades 101 are processed, the interference and clearance precision of the final binding surfaces of the blade roots on the blades 101 and the wheel grooves on the steam turbine are assembled to reach-0.03 mm (interference) to +0.035mm (clearance), the spacer ring can be repeatedly ground by other grinding tools, and the grinding precision of the spacer ring reaches 0.05 micron.
In the invention, the wheel groove cutter and the spacer ring are subjected to repeated grinding and milling to improve the accuracy requirement of processing the blade root groove on the blade 101, so that the interference and the clearance of the final binding surface of the blade root and the wheel groove can reach the expected accuracy requirement after the blade root on the blade 101 and the wheel groove on the steam turbine are assembled.
In the invention, in the step e, the blade 101 is inspected and accepted through blade body profile measurement on the blade 101, blade 101 weighing, blade 101 sequencing and blade 101 running frequency measurement, and the inspection and acceptance standard of the blade 101 facilitates the subsequent blade 101 to be symmetrically distributed on the steam turbine according to the weight when being assembled on the steam turbine, thereby ensuring the running quality of the steam turbine.
In the present invention, the profile of the blade body on the blade 101 is measured by using a frame profile measuring tool.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A production process of moving blades without a crown is characterized in that: the method comprises the following steps:
s1, arranging a process head at the tail end of a blade body on a blade (101), wherein an auxiliary thimble hole is arranged on the center line of the process head, and the auxiliary thimble hole and the center line of a blade root on the blade (101) are on the same center line;
s2, fixing the blade (101) on a tool fixture on a four-axis milling machine tool, wherein the tool fixture comprises a blade root positioning seat and a thimble seat, and fixing the blade (101) and the tool fixture:
A. fixing a blade root of the blade (101) and the blade root positioning seat, wherein a radial assembling surface of the blade root on the blade (101) and a steam passage of a blade body on the blade (101) are on the same datum line;
B. the auxiliary thimble hole is jacked on the thimble seat;
s3, constructing a three-dimensional model of the blade (101) according to the shape of the blade (101);
and S4, making a rotary milling processing scheme of the blade (101).
2. The process for producing a rotor blade without a crown as claimed in claim 1, wherein: the rotary milling processing scheme of the blade (101) comprises the following steps:
a. roughly milling the blade root on the blade (101) on a four-axis milling machine tool;
b. carrying out coarse and fine milling on the blade body of the blade (101) on a four-axis milling machine tool;
c. carrying out finish milling on the blade root on the blade (101) on a six-axis milling machine tool;
d. polishing the upper blade body of the blade (101);
e. -acceptance of said blade (101);
f. and removing the process head after acceptance inspection is qualified.
3. The process for producing a rotor blade without a crown as claimed in claim 2, wherein: in the step a, a plurality of wheel groove cutters with the same size are adopted to carry out rough milling on the blade root of the blade (101), and space rings are separated among the wheel groove cutters.
4. A process for the production of blades without a crown as claimed in claim 3, characterized in that: the wheel groove cutters are formed by repeatedly grinding the cutter by a cutter grinding machine.
5. A process for the production of blades without a crown as claimed in claim 3, characterized in that: the space ring is formed by multiple times of grinding through a surface grinder.
6. A process for the production of blades without a crown as claimed in claim 3, characterized in that: in the step e, the blade (101) is checked and accepted and subjected to blade profile measurement on the blade (101), blade (101) weighing, blade (101) sequencing and blade (101) running frequency measurement.
7. The process for producing a rotor blade without a shroud as claimed in claim 6, wherein: the profile of the blade body on the blade (101) is measured by adopting a frame type profile measuring tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010903313.3A CN112059562A (en) | 2020-09-01 | 2020-09-01 | Production process of moving blade without crown |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010903313.3A CN112059562A (en) | 2020-09-01 | 2020-09-01 | Production process of moving blade without crown |
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| Publication Number | Publication Date |
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| CN112059562A true CN112059562A (en) | 2020-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010903313.3A Pending CN112059562A (en) | 2020-09-01 | 2020-09-01 | Production process of moving blade without crown |
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| CN (1) | CN112059562A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114833536A (en) * | 2022-07-04 | 2022-08-02 | 保定康强医疗器械制造有限公司 | Femoral medullary cavity filing process and primary milling tool |
| CN114888610A (en) * | 2022-05-31 | 2022-08-12 | 哈尔滨汽轮机厂有限责任公司 | Tooth-shaped positioning block for positioning blade and clamping and aligning method for machining blade steam passage |
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| CN101513708A (en) * | 2009-03-19 | 2009-08-26 | 无锡透平叶片有限公司 | Method for locating datum surface to process leaf blade and blade root |
| CN103028917A (en) * | 2012-12-31 | 2013-04-10 | 四川绵竹鑫坤机械制造有限责任公司 | Machining process for low-pressure first-stage stationary blades of gas turbines |
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| CN107984179A (en) * | 2017-11-22 | 2018-05-04 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of quick method for preparing double installing plate blades |
| CN108406374A (en) * | 2018-06-13 | 2018-08-17 | 中国航发常州兰翔机械有限责任公司 | Process two grade blade recruitment dress of aero-engine free turbine |
| CN109623293A (en) * | 2019-02-21 | 2019-04-16 | 宁国市华成金研科技有限公司 | A kind of processing method of gas turbine blades |
| CN110355537A (en) * | 2019-07-31 | 2019-10-22 | 德阳市德源机械制造合伙企业(有限合伙) | A kind of processing method of steam turbine penult and final stage moving blade |
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2020
- 2020-09-01 CN CN202010903313.3A patent/CN112059562A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101513708A (en) * | 2009-03-19 | 2009-08-26 | 无锡透平叶片有限公司 | Method for locating datum surface to process leaf blade and blade root |
| CN103028917A (en) * | 2012-12-31 | 2013-04-10 | 四川绵竹鑫坤机械制造有限责任公司 | Machining process for low-pressure first-stage stationary blades of gas turbines |
| CN103203490A (en) * | 2012-12-31 | 2013-07-17 | 四川绵竹鑫坤机械制造有限责任公司 | Processing method of five-fork blade-root moving blades with own shrouds |
| CN107649845A (en) * | 2017-11-09 | 2018-02-02 | 东方电气集团东方汽轮机有限公司 | A kind of large scale combustion engine turbine blade essence casting blank positioning and processing method |
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| CN109623293A (en) * | 2019-02-21 | 2019-04-16 | 宁国市华成金研科技有限公司 | A kind of processing method of gas turbine blades |
| CN110355537A (en) * | 2019-07-31 | 2019-10-22 | 德阳市德源机械制造合伙企业(有限合伙) | A kind of processing method of steam turbine penult and final stage moving blade |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114888610A (en) * | 2022-05-31 | 2022-08-12 | 哈尔滨汽轮机厂有限责任公司 | Tooth-shaped positioning block for positioning blade and clamping and aligning method for machining blade steam passage |
| CN114833536A (en) * | 2022-07-04 | 2022-08-02 | 保定康强医疗器械制造有限公司 | Femoral medullary cavity filing process and primary milling tool |
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Application publication date: 20201211 |
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