CN104162683A - Numerical control machining method of steam turbine rotor sawtooth groove - Google Patents
Numerical control machining method of steam turbine rotor sawtooth groove Download PDFInfo
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- CN104162683A CN104162683A CN201410188447.6A CN201410188447A CN104162683A CN 104162683 A CN104162683 A CN 104162683A CN 201410188447 A CN201410188447 A CN 201410188447A CN 104162683 A CN104162683 A CN 104162683A
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- China
- Prior art keywords
- race
- sawtooth
- face
- translot
- notch
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B1/00—Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
The invention relates to a numerical control machining method of a steam turbine rotor sawtooth groove and belongs to the field of machining. In order to solve the problem that an existing forming tool made of high-speed steel is low in machining efficiency, the method is implemented on the basis of a straight groove cutter, a groove bottom machining tool and two sawtooth transverse groove tools, and numerical control is adopted. The method includes the steps that the straight groove cutter is used for machining a radial straight groove with an angle with the external contour of a lathed impeller as an axial standard according to specified parameters, and the end faces of the left side and the right side of the groove are made to be symmetrical; the groove bottom machining tool with the radius equal to that of the groove bottom is used for lathing and adjusting the groove bottom according to the specified parameters; the two sawtooth transverse groove tools are used for machining a sawtooth transverse groove of the groove according to the specified parameters with the end face of the intake side of the impeller as an axial tool adjusting standard and the outer circle of the impeller as a radial tool adjusting standard, and the sawtooth transverse groove tools are utilized for carrying out rough machining, non-working-surface finish machining and working surface finish machining on the end faces of the two sides of a notch of the groove. The numerical control machining method is applicable to machining of the steam turbine rotor sawtooth groove.
Description
Technical field
The invention belongs to field of machining.
Background technology
The race of certain turbine rotor grade impeller has the feature (being now referred to as sawtooth race) of structure Special complex, race indentation, there are 4 load working faces, between working face, size tolerance requirements is strict, race straight trough part two sides at an angle, wheel slot space is little, complex structure, and the degree of accuracy, the symmetry of flute profile require very high.Traditional high-speed steel forming tool working (machining) efficiency is low, and the machining accuracy of sawtooth translot is low, and cutter easily weares and teares, and the fortuitous event such as easily occur in processing forging a knife.
Summary of the invention
The object of the invention is, in order to solve the low problem of current employing high-speed steel forming tool working (machining) efficiency, to the invention provides a kind of numerical-control processing method of turbine rotor sawtooth race.
The numerical-control processing method of turbine rotor sawtooth race of the present invention,
Described processing method realizes bottom land process tool and 2 based on 1 straight trough cutting knife, 1 sawtooth translot cutter, described processing method adopts numerical control to control realization;
Described processing method comprises the steps:
Step 1: taking the outsourcing of the good impeller of car as axial benchmark, the parameter specifying according to race, is used the radially straight trough of straight trough cutting knife processing belt angle, and ensures the left and right sides end surface symmetric of race;
Step 2: according to the regulation parameter of race bottom land, the accurate race bottom land of bottom land process tool car of the radiuses such as use and bottom land;
Step 3: taking impeller air inlet side end face as axial base point for checking cutting tool with impeller cylindrical for base point for checking cutting tool radially, use respectively 2 sawtooth translot cutters, according to the regulation parameter of race sawtooth translot, the sawtooth translot of processing race, utilizes described sawtooth translot cutter to carry out successively roughing, non-working surface fine finishining and working face fine finishining to race notch both sides end face.
Beneficial effect of the present invention is, this method is applicable to the processing of turbine rotor sawtooth race, and this method has been used and totally 4 cutter completed to race processing, adds man-hour, and with impeller cylindrical 1, for base point for checking cutting tool radially, race notch air inlet side end face is axial base point for checking cutting tool.First use straight trough cutting knife, process taking impeller end face as axial benchmark, radially straight trough of band angle.Re-use the accurate bottom land of cutter vehicle with radiuses such as bottom lands.Finally use sawtooth translot cutter, add working drawing sawtooth translot, comprise roughing, non-working surface fine finishining, working face fine finishining.Owing to adopting Digit Control Machine Tool, improve machining accuracy, owing to having used the higher cutter of working speed instead, improve working (machining) efficiency.
Brief description of the drawings
Fig. 1 is the principle schematic of processing vapor turbine wheel sawtooth race in detailed description of the invention one.
Fig. 2 is the principle schematic of processing vapor turbine wheel sawtooth race in detailed description of the invention two.
Fig. 3 is the principle schematic of the bottom land of processing vapor turbine wheel sawtooth race in detailed description of the invention two.
Fig. 4 is the principle schematic of the left side sawtooth translot of rough turn race in detailed description of the invention three.
Fig. 5 is the principle schematic of the right side sawtooth translot of rough turn race in detailed description of the invention three.
Fig. 6 is the principle schematic of the left side sawtooth translot non-working surface of finish turning race in detailed description of the invention three.
Fig. 7 is the principle schematic of the right side sawtooth translot non-working surface of finish turning race in detailed description of the invention three.
Fig. 8 is the principle schematic of the left side sawtooth translot working face of finish turning race in detailed description of the invention three.
Fig. 9 is the principle schematic of the right side sawtooth translot working face of finish turning race in detailed description of the invention three.
Figure 10 is the principle schematic of the fillet of falling race in detailed description of the invention three.Wherein Rm and Rn are the fillet of falling race.
Detailed description of the invention
Detailed description of the invention one: present embodiment is described in conjunction with Fig. 1, the numerical-control processing method of the turbine rotor sawtooth race described in present embodiment, described processing method realizes bottom land process tool and 2 based on 1 straight trough cutting knife, 1 sawtooth translot cutter, described processing method adopts numerical control to control realization;
Described processing method comprises the steps:
Step 1: taking the outsourcing 2 of the good impeller of car as axial benchmark, the parameter specifying according to race, is used the radially straight trough of straight trough cutting knife processing belt angle, and ensures the left and right sides end surface symmetric of race;
Step 2: according to the regulation parameter of race bottom land, the accurate race bottom land of bottom land process tool car of the radiuses such as use and bottom land;
Step 3: taking impeller air inlet side end face as axial base point for checking cutting tool with impeller cylindrical 1 for base point for checking cutting tool radially, use respectively 2 sawtooth translot cutters, according to the regulation parameter of race sawtooth translot, the sawtooth translot of processing race, utilizes described sawtooth translot cutter to carry out successively roughing, non-working surface fine finishining and working face fine finishining to race notch both sides end face.
Described step 2 is that the left end face 3 of notch is axial zero point, and the parameter specifying according to race, adopts the accurate bottom land of bottom land process tool car, depth H, as shown in Figure 3.
Detailed description of the invention two: in conjunction with Fig. 2, present embodiment is described, present embodiment is the further restriction of the numerical-control processing method to the turbine rotor sawtooth race described in detailed description of the invention one, and described step 1 comprises the steps:
Step is one by one: taking the outsourcing 2 of the good impeller of car as axial benchmark, according to straight trough regulation parameter, adopt width w and the degree of depth L of straight trough lockstitch trimming m/c collimation groove notch, degree of depth L=safe distance+wheel groove depth h; Described safe distance is the size of the cylindrical of the described impeller of straight trough cutting knife distance before processing;
Step 1 two: press outsourcing 2 tool settings of the impeller that car is good, to return the left end face 3 of race notch be axial zero point to parameter according to the rules, a degree inclined-plane of the accurate notch of car and race, ensures the left and right sides end surface symmetric of race to ensure that tolerance is between 0-0.02mm.
Detailed description of the invention three: in conjunction with Fig. 4 to Figure 10, present embodiment is described, present embodiment is the further restriction of the numerical-control processing method to the turbine rotor sawtooth race described in detailed description of the invention one, and described step 3 comprises the steps:
Step 3 one: with left end face 3 tool settings of impeller cylindrical 1 and race notch, and taking the left end face 3 of notch as axial zero point, race sawtooth translot parameter according to the rules, the each translot in rough turn left side;
Step 3 two: with impeller cylindrical 1 and 6 tool settings of race notch its right end face, and taking notch left end face 3 as axial zero point, race sawtooth translot parameter according to the rules, the each translot in rough turn right side;
Step 3 three: with left end face 3 tool settings of impeller cylindrical 1 and race notch, and taking the left end face 3 of notch as axial zero point, race sawtooth translot parameter according to the rules, the each translot non-working surface 5 in finish turning left side;
Step 3 four: with its right end face 6 tool settings of impeller cylindrical 1 and race notch, and taking the left end face 3 of notch as axial zero point, race sawtooth translot parameter according to the rules, the each translot non-working surface 5 of finish turning;
Step 3 five: with left end face 3 tool settings of impeller cylindrical 1 and race notch, and taking the left end face 3 of notch as axial zero point, race sawtooth translot parameter according to the rules, the each translot working face 4 in finish turning left side;
Step 3 six: with its right end face 6 tool settings of impeller cylindrical 1 and race notch, and taking the left end face 3 of notch as axial zero point, race sawtooth translot parameter according to the rules, the each translot working face 4 in finish turning right side;
Step pseudo-ginseng: utilize step 3 one to 36, be processed into race, make impeller cylindrical 1 to the distance of the first tooth load-carrying surface of the race of processing between 12.5～12.9mm, and make impeller cylindrical 1 differ and be no more than 0.02mm to the distance of left and right sides working face;
Step 3 eight: with impeller cylindrical 1 and 3 tool settings of race notch left end face, and taking notch left end face 3 as axial zero point, use the straight trough cutting knife fillet of falling race.
Claims (3)
1. the numerical-control processing method of turbine rotor sawtooth race, is characterized in that being, described processing method realizes bottom land process tool and 2 based on 1 straight trough cutting knife, 1 sawtooth translot cutter, and described processing method adopts numerical control to control realization;
Described processing method comprises the steps:
Step 1: taking the outsourcing (2) of the good impeller of car as axial benchmark, the parameter specifying according to race, is used the radially straight trough of straight trough cutting knife processing belt angle, and ensures the left and right sides end surface symmetric of race;
Step 2: according to the regulation parameter of race bottom land, the accurate race bottom land of bottom land process tool car of the radiuses such as use and bottom land;
Step 3: taking impeller air inlet side end face as axial base point for checking cutting tool with impeller cylindrical (1) for base point for checking cutting tool radially, use respectively 2 sawtooth translot cutters, according to the regulation parameter of race sawtooth translot, the sawtooth translot of processing race, utilizes described sawtooth translot cutter to carry out successively roughing, non-working surface fine finishining and working face fine finishining to race notch both sides end face.
2. the numerical-control processing method of turbine rotor sawtooth race according to claim 1, is characterized in that, described step 1 comprises the steps:
Step is one by one: taking the outsourcing (2) of the good impeller of car as axial benchmark, according to straight trough regulation parameter, adopt width w and the degree of depth L of straight trough lockstitch trimming m/c collimation groove notch, degree of depth L=safe distance+wheel groove depth h; Described safe distance is the size of the cylindrical of the described impeller of straight trough cutting knife distance before processing;
Step 1 two: outsourcing (2) tool setting of pressing the impeller that car is good, the left end face (3) that parameter is returned race notch is according to the rules axial zero point, the a degree inclined-plane of the accurate notch of car and race, the left and right sides end surface symmetric of guarantee race, ensures that tolerance is between 0-0.02mm.
3. the numerical-control processing method of turbine rotor sawtooth race according to claim 2, is characterized in that, described step 3 comprises the steps:
Step 3 one: with left end face (3) tool setting of impeller cylindrical (1) and race notch, and taking the left end face (3) of notch as axial zero point, race sawtooth translot parameter according to the rules, the each translot in rough turn left side;
Step 3 two: with impeller cylindrical (1) and race notch its right end face (6) tool setting, and taking notch left end face (3) as axial zero point, race sawtooth translot parameter according to the rules, the each translot in rough turn right side;
Step 3 three: with left end face (3) tool setting of impeller cylindrical (1) and race notch, and taking the left end face (3) of notch as axial zero point, race sawtooth translot parameter according to the rules, the finish turning each translot non-working surface in left side (5);
Step 3 four: with its right end face (6) tool setting of impeller cylindrical (1) and race notch, and taking the left end face (3) of notch as axial zero point, race sawtooth translot parameter according to the rules, the each translot non-working surface of finish turning (5);
Step 3 five: with left end face (3) tool setting of impeller cylindrical (1) and race notch, and taking the left end face (3) of notch as axial zero point, race sawtooth translot parameter according to the rules, the finish turning each translot working face in left side (4);
Step 3 six: with its right end face (6) tool setting of impeller cylindrical (1) and race notch, and taking the left end face (3) of notch as axial zero point, race sawtooth translot parameter according to the rules, the each translot working face in finish turning right side (4);
Step pseudo-ginseng: utilize step 3 one to 36, be processed into race, make impeller cylindrical (1) to the distance of the first tooth load-carrying surface of the race of processing between 12.5mm～12.9mm, and make impeller cylindrical (1) differ and be no more than 0.02mm to the distance of left and right sides working face;
Step 3 eight: with impeller cylindrical (1) and race notch left end face (3) tool setting, and taking notch left end face (3) as axial zero point, use the straight trough cutting knife fillet of falling race.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410188447.6A CN104162683B (en) | 2014-05-06 | 2014-05-06 | The numerical-control processing method of turbine rotor sawtooth race |
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| CN201410188447.6A CN104162683B (en) | 2014-05-06 | 2014-05-06 | The numerical-control processing method of turbine rotor sawtooth race |
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| CN104162683A true CN104162683A (en) | 2014-11-26 |
| CN104162683B CN104162683B (en) | 2016-08-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104028782A (en) * | 2014-06-06 | 2014-09-10 | 中国南方航空工业(集团)有限公司 | Lathe machining method for end face deep narrow groove in aerial engine crankcase |
| CN111266603A (en) * | 2020-01-15 | 2020-06-12 | 哈尔滨汽轮机厂有限责任公司 | Tooth-shaped wheel groove machining method |
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| JP2004042188A (en) * | 2002-07-11 | 2004-02-12 | Canon Inc | Working method of die |
| CN101745673A (en) * | 2009-12-18 | 2010-06-23 | 东方电气集团东方汽轮机有限公司 | Processing method of turbo machine rotor wheel groove and milling cutter |
| CN102350525A (en) * | 2011-09-16 | 2012-02-15 | 哈尔滨汽轮机厂有限责任公司 | Method for machining asymmetric wheel groove of steam turbine rotor |
| CN102773655A (en) * | 2012-07-20 | 2012-11-14 | 哈尔滨汽轮机厂有限责任公司 | Repairing method of steam turbine rotor fir type wheel groove |
| CN103267500A (en) * | 2013-04-18 | 2013-08-28 | 哈尔滨汽轮机厂有限责任公司 | Measuring tool for measuring dimensional tolerance between carrying surface and reference surface of fir-type race of steam turbine rotor and measuring method of measuring tool |
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2014
- 2014-05-06 CN CN201410188447.6A patent/CN104162683B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004042188A (en) * | 2002-07-11 | 2004-02-12 | Canon Inc | Working method of die |
| CN101745673A (en) * | 2009-12-18 | 2010-06-23 | 东方电气集团东方汽轮机有限公司 | Processing method of turbo machine rotor wheel groove and milling cutter |
| CN102350525A (en) * | 2011-09-16 | 2012-02-15 | 哈尔滨汽轮机厂有限责任公司 | Method for machining asymmetric wheel groove of steam turbine rotor |
| CN102773655A (en) * | 2012-07-20 | 2012-11-14 | 哈尔滨汽轮机厂有限责任公司 | Repairing method of steam turbine rotor fir type wheel groove |
| CN103267500A (en) * | 2013-04-18 | 2013-08-28 | 哈尔滨汽轮机厂有限责任公司 | Measuring tool for measuring dimensional tolerance between carrying surface and reference surface of fir-type race of steam turbine rotor and measuring method of measuring tool |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104028782A (en) * | 2014-06-06 | 2014-09-10 | 中国南方航空工业(集团)有限公司 | Lathe machining method for end face deep narrow groove in aerial engine crankcase |
| CN111266603A (en) * | 2020-01-15 | 2020-06-12 | 哈尔滨汽轮机厂有限责任公司 | Tooth-shaped wheel groove machining method |
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| CN104162683B (en) | 2016-08-17 |
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