CN202398875U - Milling cutter for machining roots of blades of steam turbine - Google Patents
Milling cutter for machining roots of blades of steam turbine Download PDFInfo
- Publication number
- CN202398875U CN202398875U CN2011204821112U CN201120482111U CN202398875U CN 202398875 U CN202398875 U CN 202398875U CN 2011204821112 U CN2011204821112 U CN 2011204821112U CN 201120482111 U CN201120482111 U CN 201120482111U CN 202398875 U CN202398875 U CN 202398875U
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- China
- Prior art keywords
- blade
- chip area
- round platform
- milling cutter
- cutter hub
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- Expired - Lifetime
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Abstract
The utility model relates to a milling cutter for machining roots of blades of a steam turbine. The milling cutter comprises a cuter body and a plurality of cutter blades; a chip groove is arranged on the cutter body; and the plurality of cutter blades are detachably arranged on the inner wall of the same side of the chip groove. The milling cutter overcomes the shortcoming that as the traditional machining cutter is scrapped due to the abrasion of the cutting edge, the machining cost of the blades of the steam turbine is high; and the milling cutter provided by the utility model can greatly reduce the machining cost and is used for machining the roots of the blades of the steam turbine.
Description
Technical field
The utility model relates to a kind of machining tool.Be specially a kind of milling cutter that is used for the blade root of processing vapor turbine blade.
Background technology
At present, the blade of Steam Turbine and race adopt common fir shape, and this structure has increased the contact area of blade root and race, make the load more even distribution, but its dimension precision requirement is high, and curve form is complicated, the processing and manufacturing difficulty.Process this class formation and adopt dedicated numerical control blade root milling machine and global formation high-speed steel or carbide alloy blade root milling cutter more, geometry can change after the blade of this cutter wearing and tearing rust, and can not reface, and causes whole cutter not re-use and scraps.Because the price comparison of cutter is high, the processing cost that causes turbine blade is than higher.
The utility model content
The technical problem that the utility model solves is to overcome existing process tool owing to the shortcoming that causes the turbine Blade Machining cost high is scrapped in the blade wearing and tearing, and the milling cutter of a kind of blade root that is used for the processing vapor turbine blade that can cut down finished cost greatly is provided.
The milling cutter of the blade root that is used for the processing vapor turbine blade of the utility model comprises cutter hub and a plurality of blade, offers chip area on the said cutter hub, and a plurality of said blades are removably mounted on the inwall of the same side of said chip area.
As preferably; Said cutter hub comprises column part and round platform part; The diameter of the less end face of said round platform part and less end face said round platform part identical with the diameter of said column part links to each other with said column part, and the column part of said cutter hub partly all offers discharge launder with round platform a plurality of said blades also are installed removably.
Preferred as further; All offer a plurality of spaced spirality chip areas on the column part of said cutter hub and the round platform part; The sidewall of the same side of a plurality of said spirality chip areas all is equipped with the said blade of a row; Said blade is first blade that the tangential of the outer surface of the said cutter hub in edge is provided with, and the continuous end face from said column part of the blade of said first blade of every row extends to another end face of said column part or extends to said round platform another end face partly from a said round platform end face partly.
Preferred as further; Each said first blade all has blade and two locating surfaces; Each said spirality chip area is equipped with on the sidewall of said first blade and offers a plurality of insert grooves; Each said insert groove has two location sidewalls, and two location sidewalls of two locating surfaces of each said first blade and corresponding said insert groove offset respectively.
Preferred as further; Offer a plurality of cutting slots on the outer surface of the round platform part of said cutter hub along the circumferential annular of round platform; The cross section of said cutting slot is trapezoidal; Offer at least one group of said short chip area on the wall of each said cutting slot; Every group of said short chip area comprise first chip area on the wherein sidewall that is opened in said cutting slot, be opened in second chip area on another sidewall of said cutting slot and be opened in the 3rd chip area on the diapire of said cutting slot; Said first chip area, second chip area and the 3rd chip area that belong to same group are provided with along the direction of offering of said cutting slot at interval; The said blade that the inwall of the same side of said first chip area, second chip area and the 3rd chip area is installed is respectively second blade, the 3rd blade and four blade sheet, and the blade that is installed in one group of said short chip area constitutes a set of blades.
Preferred as further; Each said blade has at least two locating surfaces; Said short chip area is equipped with on the sidewall of said blade and offers a plurality of insert grooves; Each said insert groove has at least two location sidewalls, and the location sidewall of the locating surface of said blade and corresponding said insert groove offsets.
Preferred as further, the round platform of said cutter hub partly offers four said cutting slots.
Preferred as further, be provided with three said set of blades in each said cutting slot.
Preferred as further; The outer surface of the column part of said cutter hub is provided with a plurality of the 5th blades of arranging twist, and the blade that forms a plurality of said the 5th blade of same helix is covered with the distance of said column part between an end face to another end face.
As preferably, said cutter hub also is provided with handle of a knife in said round platform part one side.
The milling cutter of the blade root that is used for the processing vapor turbine blade of the utility model is compared with prior art, has following beneficial effect:
1, the milling cutter of the blade root that is used for the processing vapor turbine blade of the utility model is because blade and cutter hub are splits; When the edges dull of blade or tipping; Can blade be unloaded, change new blade, and need whole milling cutter is not discarded; Therefore can reduce the cost of processing vapor turbine blade greatly, and practice thrift resource.
2, offer insert groove on the said cutter hub, said blade is through screw or be bolted in the said insert groove, thereby blade firmly is fixed on the cutter hub, prevents that blade is in stressed distortion or on cutter hub, drop when excessive.
3, because the number of blade is many, increase the sword number, can remove more metal in the unit interval, improved working (machining) efficiency.
4, all offer a plurality of spaced spirality chip areas on the column part of said cutter hub and the round platform part, the spirality chip area more meets the flow direction of smear metal, therefore is more conducive to the discharge of smear metal.
Description of drawings
Fig. 1 is the structural representation of the milling cutter of the blade root that is used for the processing vapor turbine blade of first embodiment of the utility model;
Fig. 2 is the structural representation of the milling cutter of the blade root that is used for the processing vapor turbine blade of second embodiment of the utility model;
Fig. 3 is the sketch map of one group of blade working groove on the round platform of blade root of the round platform part of the milling cutter of the blade root that is used for the processing vapor turbine blade of second embodiment of the utility model;
The structural representation of the blade root that Fig. 4 processes for the milling cutter of the blade root that is used for the processing vapor turbine blade of first embodiment that adopts the utility model and second embodiment.
Reference numeral
The 1-cutter hub, 2-handle of a knife, 3-round platform part, 4-column part, 5-spirality chip area, 6-insert groove; The 7-pinching screw, 8-first blade, 9-second blade, 10-the 3rd blade, 11-four blade sheet, 12-the 5th blade; The 13-tooth, 14-cylinder, 15-round platform, 16-cutting slot, the short chip area of 17-.
The specific embodiment
Fig. 1 is the structural representation of the milling cutter of the blade root that is used for the processing vapor turbine blade of the utility model first embodiment, and the milling cutter of the blade root that is used for the processing vapor turbine blade of present embodiment is used for workpiece is carried out roughing.As shown in Figure 1; Comprise cutter hub 1 and blade, the shape of cutter hub 1 can confirm according to the shape of the blade root of desiring to be processed into, in the present embodiment; Cutter hub 1 comprises column part 4 and round platform part 3; The diameter of the less end face of round platform part 3 and less end face round platform part 3 identical with the diameter of column part 4 links to each other with column part 4, and the bigger end face of round platform part 3 is provided with handle of a knife 2, and through handle of a knife 2 cutter hub 1 is installed on the lathe.Wherein the blade of the column part 4 of cutter hub 1 is used for the cylinder 14 of blade root of processing vapor turbine blade, and the blade of round platform part 3 is used for processing the round platform 15 (structure of blade root is as shown in Figure 4) of blade root.Milling cutter the blade root that is used for the processing vapor turbine blade of the utility model; Blade and cutter hub 1 are splits; Blade is removably mounted on the cutter hub 1, and in the present embodiment, blade is installed on the cutter hub 1 through pinching screw 7; Also offer spirality chip area 5 on the cutter hub 1, the smear metal that milling cutter produces in the process of cutting flows into spirality chip area 5 and discharges through spirality chip area 5.The milling cutter of the blade root that is used for the processing vapor turbine blade of the utility model is because blade and cutter hub 1 are splits; When the edges dull of blade or tipping; Can blade be unloaded, change new blade, and need whole milling cutter is not discarded; Therefore can reduce the cost of processing vapor turbine blade greatly, and practice thrift resource.
Preferred as first embodiment; All offer a plurality of spaced spirality chip areas 5 on the column part 4 of cutter hub 1 and the round platform part 3; Spirality chip area 5 more meets the flow direction of smear metal, therefore is more conducive to the discharge of high temperature smear metal, can more effectively reduce the temperature of cutter hub 1.The sidewall of the same side of a plurality of spirality chip areas 5 all is equipped with row's blade; This blade is first blade 8 along the tangential setting of the outer surface of cutter hub 1; Whenever the blade that ranked first blade 8 links to each other that a end face from cylinder part 4 extends to another end face of column part 4 or extends to another end face of round platform part 3 from an end face of round platform part 3; So that the blade of column part 4 cuts the shape of complete cylinder as shown in Figure 4 14 on workpiece, the blade of round platform part 3 cuts the shape of complete round platform as shown in Figure 4 15 on workpiece.
Preferred as first embodiment offers a plurality of insert grooves 6 along a side of each spirality chip area 5, and each insert groove 6 has two location sidewalls, and the location sidewall of a plurality of insert grooves 6 connects into step-like.Be provided with one first blade, 8, the first blades 8 in each insert groove 6 and have blade and two locating surfaces, two locating surfaces of first blade 8 offset with two of insert groove 6 location sidewalls respectively, make the fixing more stable of first blade 8.
Fig. 2 is the structural representation of the milling cutter of the blade root that is used for the processing vapor turbine blade of second embodiment of the utility model; Fig. 3 process the sketch map of tooth for one group of blade of the round platform part of the milling cutter of the blade root that is used for the processing vapor turbine blade of second embodiment of the utility model on the round platform of blade root, Fig. 4 is the structural representation of the milling cutter of the blade root that is used for the processing vapor turbine blade of first embodiment and second embodiment of the utility model blade root of being processed into.The milling cutter of the blade root that is used for the processing vapor turbine blade of present embodiment is used for the root of blade is carried out semifinishing, promptly on round platform 15, processes a plurality of cross sections and be tooth 13 trapezoidal and that extend along the circumference of round platform 15, and the further surface of processing column 14.
As shown in Figure 2; The milling cutter of the blade root that is used for the processing vapor turbine blade of present embodiment comprises cutter hub 1 and blade; Cutter hub 1 also comprises column part 4 and round platform part 3, and the diameter of the less end face of round platform part 3 and less end face round platform part 3 identical with the diameter of column part 4 links to each other with column part 4.Offer a plurality of cutting slots 16 on the outer surface of the round platform part 3 of cutter hub 1 along the circumferential annular of round platform part 3; The cross section of cutting slot 16 is trapezoidal; Offer at least one group short chip area 17 on the wall of each cutting slot 16; Every group short chip area 17 comprise first chip area on the wherein sidewall that is opened in cutting slot 16, be opened in second chip area on another sidewall of said cutting slot 16 and be opened in the 3rd chip area on the diapire of cutting slot 16; First chip area, second chip area and the 3rd chip area that belong to same group are provided with along the direction that is provided with of cutting slot at interval; The blade that the inwall of the same side of first chip area, second chip area and the 3rd chip area is installed is respectively second blade 9, the 3rd blade 10 and four blade sheet 11, is installed in the set of blades of blades formation in the one group short chip area 17.Like Fig. 3 and shown in Figure 4, each set of blades can cut a cross section on the round platform 15 of blade root be trapezoidal tooth 13.In the present embodiment; The round platform part 3 of cutter hub 1 offers four cutting slots 16, and can on the blade root of blade, process four cross sections is trapezoidal tooth 13, and each cutting slot 16 is provided with three set of blades; Because the number of blade is many; Increase the sword number, can remove more metal in the unit interval, improved working (machining) efficiency.Outer surface on the column part 4 of cutter hub 1 is provided with a plurality of the 5th blades of arranging twist; The blade that forms a plurality of the 5th blades 12 of same helix is covered with the distance of column part 4 between an end face to another end face, can further process the whole cylinder 14 of blade root.
Above embodiment is merely the exemplary embodiment of the utility model, is not used in restriction the utility model, and the protection domain of the utility model is defined by the claims.Those skilled in the art can make various modifications or be equal to replacement the utility model in the essence and protection domain of the utility model, this modification or be equal to replacement and also should be regarded as dropping in the protection domain of the utility model.
Claims (10)
1. a milling cutter that is used for the blade root of processing vapor turbine blade comprises cutter hub and a plurality of blade, offers chip area on the said cutter hub, it is characterized in that: a plurality of said blades are removably mounted on the inwall of the same side of said chip area.
2. the milling cutter that is used for the blade root of processing vapor turbine blade according to claim 1; It is characterized in that: said cutter hub comprises column part and round platform part; The diameter of the less end face of said round platform part and less end face said round platform part identical with the diameter of said column part links to each other with said column part, and the column part of said cutter hub partly all offers discharge launder with round platform a plurality of said blades also are installed removably.
3. the milling cutter that is used for the blade root of processing vapor turbine blade according to claim 2; It is characterized in that: all offer a plurality of spaced spirality chip areas on the column part of said cutter hub and the round platform part; The sidewall of the same side of a plurality of said spirality chip areas all is equipped with the said blade of a row; Said blade is first blade that the tangential of the outer surface of the said cutter hub in edge is provided with, and the continuous end face from said column part of the blade of said first blade of every row extends to another end face of said column part or extends to said round platform another end face partly from a said round platform end face partly.
4. the milling cutter that is used for the blade root of processing vapor turbine blade according to claim 3; It is characterized in that: each said first blade all has blade and two locating surfaces; Each said spirality chip area is equipped with on the sidewall of said first blade and offers a plurality of insert grooves; Each said insert groove has two location sidewalls, and two location sidewalls of two locating surfaces of each said first blade and corresponding said insert groove offset respectively.
5. the milling cutter that is used for the blade root of processing vapor turbine blade according to claim 2; It is characterized in that: offer a plurality of said cutting slots on the outer surface of the round platform part of said cutter hub along the circumferential annular of round platform part; The cross section of said cutting slot is trapezoidal; Offer at least one group of said short chip area on the wall of each said cutting slot; Every group of said short chip area comprise first chip area on the wherein sidewall that is opened in said cutting slot, be opened in second chip area on another sidewall of said cutting slot and be opened in the 3rd chip area on the diapire of said cutting slot; Said first chip area, second chip area and the 3rd chip area that belong to same group are provided with along the direction of offering of said cutting slot at interval; The said blade that the inwall of the same side of said first chip area, second chip area and the 3rd chip area is installed is respectively second blade, the 3rd blade and four blade sheet, and the blade that is installed in one group of said short chip area constitutes a set of blades.
6. the milling cutter that is used for the blade root of processing vapor turbine blade according to claim 5; It is characterized in that: each said blade has at least two locating surfaces; Said short chip area is equipped with on the sidewall of said blade and offers a plurality of insert grooves; Each said insert groove has at least two location sidewalls, and the location sidewall of the locating surface of said blade and corresponding said insert groove offsets.
7. the milling cutter that is used for the blade root of processing vapor turbine blade according to claim 5 is characterized in that: the round platform of said cutter hub partly offers four said cutting slots.
8. according to claim 5 or the 6 described milling cutters that are used for the blade root of processing vapor turbine blade, it is characterized in that: be provided with three said set of blades in each said cutting slot.
9. the milling cutter that is used for the blade root of processing vapor turbine blade according to claim 5; It is characterized in that: the outer surface of the column part of said cutter hub is provided with a plurality of the 5th blades of arranging twist, and the blade that forms a plurality of said the 5th blade of same helix is covered with the distance of said column part between an end face to another end face.
10. the milling cutter that is used for the blade root of processing vapor turbine blade according to claim 1 is characterized in that: said cutter hub also is provided with handle of a knife in said round platform part one side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204821112U CN202398875U (en) | 2011-11-28 | 2011-11-28 | Milling cutter for machining roots of blades of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204821112U CN202398875U (en) | 2011-11-28 | 2011-11-28 | Milling cutter for machining roots of blades of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202398875U true CN202398875U (en) | 2012-08-29 |
Family
ID=46696551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204821112U Expired - Lifetime CN202398875U (en) | 2011-11-28 | 2011-11-28 | Milling cutter for machining roots of blades of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202398875U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102935582A (en) * | 2012-11-16 | 2013-02-20 | 哈尔滨汽轮机厂有限责任公司 | Processing method of large blade with tiepiece boss and bone type shroud ring structure of turbine |
-
2011
- 2011-11-28 CN CN2011204821112U patent/CN202398875U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102935582A (en) * | 2012-11-16 | 2013-02-20 | 哈尔滨汽轮机厂有限责任公司 | Processing method of large blade with tiepiece boss and bone type shroud ring structure of turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120829 |