CN102091937A - Machining method of thermal power rotors - Google Patents
Machining method of thermal power rotors Download PDFInfo
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- CN102091937A CN102091937A CN2009102019302A CN200910201930A CN102091937A CN 102091937 A CN102091937 A CN 102091937A CN 2009102019302 A CN2009102019302 A CN 2009102019302A CN 200910201930 A CN200910201930 A CN 200910201930A CN 102091937 A CN102091937 A CN 102091937A
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- centre bore
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Abstract
The invention discloses a machining method of thermal power rotors, which is used for machining rotors which is not short than 11 meters totally and is provided with a blind hole center hole with the depth being not smaller than 3 meters. The rotors are manufactured by the following steps: 1. rough external turning; 2. the machining of long hole nesting of the center hole; 3. semi-finish external turning; 4. the finish machining of the inner surface of the center hole; and 5. the finish external turning. The machining method of thermal power rotors can machine rotors with high precision, high surface roughness, long center holes, and center holes of flat-bottom-surface blind holes and meet the requirement on precision.
Description
Technical field
The present invention relates to a kind of machining process of rotor, be specifically related to a kind of machining process of thermoelectricity rotor.
Background technology
The thermoelectricity rotor is the important composition part of thermal power generation steam turbine, is the key core part of generating equipment, also is the bridge of power conversion.Rotatablely move by heat energy steam drive rotor high-speed, and, realize the conversion of energy, thereby finish the generation and the transmission of electric energy steam thermal energy → mechanical kinetic energy → electric energy.
The structure of thermoelectricity rotor as shown in Figure 1 and Figure 2, it is 3100mm that total length 11998mm, an end are provided with the degree of depth, diameter is the blind hole centre bore of 130mm, its key technical indexes is as follows:
1, A, B support axle journal cylindricity is 0.03mm;
2, the endoporus tolerance of centre bore is+0.4/-0.2mm;
3, the surface roughness of centre bore is Ra1.6;
4, the total length difference in internal diameters of centre bore is 0/-0.2mm;
5, the inner bottom surface of centre bore is a planar base surface;
6, the axiality of centre bore is 0.25mm;
7, the total length of centre bore is 3107+3mm.
From above data as can be seen, this thermoelectricity centre of rotor hole is long, and precision and surface roughness require high, and inner bottom surface requires to be planar base surface that for this thermoelectricity rotor, present rotor manufacturing industry does not also have the successfully precedent of manufacturing.
Summary of the invention
Technical problem to be solved by this invention provides a kind of machining process of thermoelectricity rotor, and it can produce the thermoelectricity rotor that meets above technical indicator.
For solving the problems of the technologies described above, the technical solution of the machining process of thermoelectricity rotor of the present invention is: carry out the manufacturing of rotor by following steps:
The first step, rough turn cylindrical;
Second step, the deep hole jacking processing of centre bore;
Use cylindrical drill to carry out the deep hole jacking earlier; Re-use the deep hole reamer reaming is carried out in this hole, make the roughness of centre bore inner surface reach Ra3.2; Use the thick bottoming drill of reaming that thick flat processing is carried out in the bottom surface of centre bore then; Use flat moulding cutter head that smart flat processing is carried out in the bottom surface of centre bore at last, finish the processing of centre bore planar base surface.
The 3rd step, half finish turning cylindrical;
Join silently at centre bore, as machining benchmark, utilize the cylindrical surplus of workpiece with centre bore, half finish turning workpiece each several part cylindrical and shoulder face, both ends of the surface make each several part cylindrical and centre bore coaxial.
The 4th step, the inner surface of fine finishining centre bore;
Adopt earlier high rigidity boring bar, centre bore is carried out heavy boring, right boring, proofread and correct the deflection of centre bore axis to greatest extent, make the axiality of centre bore reach the required precision of 0.25mm; Adopt two-wheel honing head and honing wheel then, the center internal surface of hole is carried out thick microhoning, improve the surface roughness of centre bore inner surface; Adopt the deep hole honing head again, polishing centre bore inner surface; Adopt mop polishing device, thick microhoning head and pyramid sand paper at last, thick finishing polish centre bore inner surface makes its surface roughness reach Ra1.6.
The 5th step, the finish turning cylindrical;
Join silently at centre bore, as machining benchmark, utilize the cylindrical surplus of workpiece, adopt hard alloy cutter finish turning workpiece each several part cylindrical and shoulder face, both ends of the surface, make the axiality of each several part cylindrical and centre bore satisfy the required precision of 0.25mm with centre bore.
The technique effect that the present invention can reach is:
The present invention can realize the machine-building of the rotor of high accuracy, high surface roughness, long centre bore, planar base surface blind hole centre bore, satisfies its required precision.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments:
Fig. 1 is the structural representation of thermoelectricity rotor;
Fig. 2 is the partial enlarged drawing of Y among Fig. 1;
Fig. 3 is the structural representation of mop polishing device;
Fig. 4 is the flow chart of the machining process of thermoelectricity rotor of the present invention.
The specific embodiment
As shown in Figure 4, the machining process of thermoelectricity rotor of the present invention is used to make total length and is not less than 11 meters, and an end is provided with the thermal power generation turbine rotor that the degree of depth is not less than 3 meters blind hole centre bore, and the key technical indexes of this thermoelectricity rotor is as follows:
1, A, B support axle journal cylindricity is 0.03mm;
2, the diameter of bore of centre bore is 130mm, and the endoporus tolerance is+0.4/-0.2mm;
3, the surface roughness of centre bore endoporus is Ra1.6;
4, the total length difference in internal diameters of centre bore is 0/-0.2mm;
5, the inner bottom surface of centre bore is a planar base surface;
6, the axiality of centre bore is 0.25mm;
7, the total length of centre bore is 3107+3mm.
From above technical indicator as can be seen, the manufacturing key of this thermoelectricity rotor is the processing of centre bore.
The manufacturing of thermoelectricity rotor is undertaken by following steps:
1, rough turn cylindrical;
2, the deep hole jacking of centre bore processing:
Use cylindrical drill to carry out the deep hole jacking earlier, extract the centre bore that diameter is 120mm; Re-use the deep hole reamer reaming is carried out in this hole, make the roughness of centre bore inner surface reach Ra3.2; Use the thick bottoming drill of reaming that thick flat processing is carried out in the bottom surface of centre bore then; Use flat moulding cutter head that smart flat processing is carried out in the bottom surface of centre bore at last, finish the processing of centre bore planar base surface.
After the centre bore jacking is finished, adopt the skew direction of sonigauge inspection center axially bored line and the size of deflection.
3, half finish turning cylindrical:
Join silently at centre bore, as machining benchmark, according to the testing result of centre bore axis deflection, utilize the cylindrical surplus of workpiece with centre bore, half finish turning workpiece each several part cylindrical and shoulder face, both ends of the surface make each several part cylindrical and centre bore coaxial.
4, the inner surface of fine finishining centre bore:
Adopt high rigidity boring bar earlier, centre bore is carried out heavy boring, right boring, proofread and correct the deflection of centre bore axis to greatest extent, make the axiality of centre bore reach the required precision of 0.25mm, the total length difference in internal diameters of centre bore is 0/-0.2mm, and diameter of bore reaches 130mm, endoporus tolerance+0.4/-0.2mm; After boring is finished, adopt the skew direction of sonigauge inspection center axially bored line and the size of deflection.
Adopt high rigidity boring bar in this step,, make centre bore reach the axiality requirement to reduce the deflection of centre bore axis to greatest extent.
Use two-wheel honing head and honing wheel then, the center internal surface of hole is carried out thick microhoning, improve the surface roughness of centre bore inner surface; Then adopt the deep hole honing head, polishing centre bore inner surface; Adopt mop polishing device as shown in Figure 3, thick microhoning head and pyramid sand paper at last, thick finishing polish centre bore inner surface makes its surface roughness reach Ra1.6.
5, finish turning cylindrical:
Numerically controlled lathe on the workpiece, join silently at centre bore, with centre bore as machining benchmark, testing result according to centre bore axis deflection, utilize the cylindrical surplus of workpiece, adopt hard alloy cutter finish turning workpiece each several part cylindrical and shoulder face, both ends of the surface, make the axiality of each several part cylindrical and centre bore satisfy the required precision of 0.25mm, the cylindricity of benchmark axle journal A, B is 0.03mm, and the total length of centre bore is 3107+3mm.
The present invention adopts benchmark principle each other, with the actual axis of centre bore is benchmark, utilize the cylindrical surplus of workpiece, reprocessing cylindrical support axle journal A, B and each several part cylindrical and shoulder face, both ends of the surface, make workpiece each several part cylindrical coaxial with manufactured centre bore actual center line, the axiality that makes centre bore and cylindrical support axle journal benchmark A, B satisfies required precision.
Claims (5)
1. the machining process of a thermoelectricity rotor is used to make total length and is not less than 11 meters, and an end is provided with the rotor that the degree of depth is not less than 3 meters blind hole centre bore, it is characterized in that: carry out the manufacturing of rotor by following steps:
The first step, rough turn cylindrical;
Second step, the deep hole jacking processing of centre bore;
The 3rd step, half finish turning cylindrical;
The 4th step, the inner surface of fine finishining centre bore;
The 5th step, the finish turning cylindrical.
2. the machining process of thermoelectricity rotor according to claim 1 is characterized in that, the deep hole jacking processing method of the described second step centre bore is: use cylindrical drill to carry out the deep hole jacking earlier; Re-use the deep hole reamer reaming is carried out in this hole, make the roughness of centre bore inner surface reach Ra3.2; Use the thick bottoming drill of reaming that thick flat processing is carried out in the bottom surface of centre bore then; Use flat moulding cutter head that smart flat processing is carried out in the bottom surface of centre bore at last, finish the processing of centre bore planar base surface.
3. the machining process of thermoelectricity rotor according to claim 1, it is characterized in that, the method of described the 3rd step half finish turning cylindrical is: join silently at centre bore, with centre bore as machining benchmark, utilize the cylindrical surplus of workpiece, half finish turning workpiece each several part cylindrical and shoulder face, both ends of the surface make each several part cylindrical and centre bore coaxial.
4. the machining process of thermoelectricity rotor according to claim 1, it is characterized in that, the method of the inner surface of described the 4th step fine finishining centre bore is: adopt high rigidity boring bar earlier, centre bore is carried out heavy boring, right boring, proofread and correct the deflection of centre bore axis to greatest extent, make the axiality of centre bore reach the required precision of 0.25mm; Adopt two-wheel honing head and honing wheel then, the center internal surface of hole is carried out thick microhoning, improve the surface roughness of centre bore inner surface; Adopt the deep hole honing head again, polishing centre bore inner surface; Adopt mop polishing device, thick microhoning head and pyramid sand paper at last, thick finishing polish centre bore inner surface makes its surface roughness reach Ra1.6.
5. the machining process of thermoelectricity rotor according to claim 1, it is characterized in that, the method of described the 5th step finish turning cylindrical is: join silently at centre bore, with centre bore as machining benchmark, utilize the cylindrical surplus of workpiece, adopt hard alloy cutter finish turning workpiece each several part cylindrical and shoulder face, both ends of the surface, make the axiality of each several part cylindrical and centre bore satisfy the required precision of 0.25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910201930 CN102091937B (en) | 2009-12-15 | 2009-12-15 | Machining method of thermal power rotors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910201930 CN102091937B (en) | 2009-12-15 | 2009-12-15 | Machining method of thermal power rotors |
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| CN102091937A true CN102091937A (en) | 2011-06-15 |
| CN102091937B CN102091937B (en) | 2013-04-10 |
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| CN 200910201930 Expired - Fee Related CN102091937B (en) | 2009-12-15 | 2009-12-15 | Machining method of thermal power rotors |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102658468A (en) * | 2012-05-30 | 2012-09-12 | 湖北三江航天红阳机电有限公司 | Method, device and drill for machining glass reinforced plastic sleeve |
| CN103166382A (en) * | 2011-12-14 | 2013-06-19 | 上海重型机器厂有限公司 | Machining method of circular transition section on bottom of central blind hole of generator rotor |
| CN103358090A (en) * | 2013-07-25 | 2013-10-23 | 遵义市节庆机电有限责任公司 | Processing technic of bar-shaped thin-wall part |
| CN109227047A (en) * | 2018-10-19 | 2019-01-18 | 新乡市恒德机电有限公司 | A kind of hydraulic valve deep hole processing technology |
| CN111545771A (en) * | 2020-04-03 | 2020-08-18 | 东方电气集团东方电机有限公司 | Machining method for high-precision reference of large shaft |
| CN114833359A (en) * | 2022-04-26 | 2022-08-02 | 南阳微特防爆电机有限公司 | Processing method for reducing stray loss of rotor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2609697Y (en) * | 2002-12-09 | 2004-04-07 | 山东通裕集团 | Large diameter deep hole trepanning rod |
| JP2007049787A (en) * | 2005-08-08 | 2007-02-22 | Toyota Motor Corp | Rotor for dynamo-electric machine and its manufacturing method |
| CN101112743A (en) * | 2007-07-25 | 2008-01-30 | 江苏星晨高速电机有限公司 | Automatic triggering and broaching tool main spindle processing technics |
| CN101404425A (en) * | 2008-11-20 | 2009-04-08 | 湘潭电机股份有限公司 | Monobloc forging solid rotor of high speed inductor generator and manufacturing method thereof |
-
2009
- 2009-12-15 CN CN 200910201930 patent/CN102091937B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2609697Y (en) * | 2002-12-09 | 2004-04-07 | 山东通裕集团 | Large diameter deep hole trepanning rod |
| JP2007049787A (en) * | 2005-08-08 | 2007-02-22 | Toyota Motor Corp | Rotor for dynamo-electric machine and its manufacturing method |
| CN101112743A (en) * | 2007-07-25 | 2008-01-30 | 江苏星晨高速电机有限公司 | Automatic triggering and broaching tool main spindle processing technics |
| CN101404425A (en) * | 2008-11-20 | 2009-04-08 | 湘潭电机股份有限公司 | Monobloc forging solid rotor of high speed inductor generator and manufacturing method thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166382A (en) * | 2011-12-14 | 2013-06-19 | 上海重型机器厂有限公司 | Machining method of circular transition section on bottom of central blind hole of generator rotor |
| CN103166382B (en) * | 2011-12-14 | 2015-10-28 | 上海重型机器厂有限公司 | The processing method of the circular transition section on bottom of central blind hole of generator amature |
| CN102658468A (en) * | 2012-05-30 | 2012-09-12 | 湖北三江航天红阳机电有限公司 | Method, device and drill for machining glass reinforced plastic sleeve |
| CN103358090A (en) * | 2013-07-25 | 2013-10-23 | 遵义市节庆机电有限责任公司 | Processing technic of bar-shaped thin-wall part |
| CN109227047A (en) * | 2018-10-19 | 2019-01-18 | 新乡市恒德机电有限公司 | A kind of hydraulic valve deep hole processing technology |
| CN111545771A (en) * | 2020-04-03 | 2020-08-18 | 东方电气集团东方电机有限公司 | Machining method for high-precision reference of large shaft |
| CN114833359A (en) * | 2022-04-26 | 2022-08-02 | 南阳微特防爆电机有限公司 | Processing method for reducing stray loss of rotor |
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| Publication number | Publication date |
|---|---|
| CN102091937B (en) | 2013-04-10 |
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Granted publication date: 20130410 Termination date: 20161215 |