CN109365890A - Cutter for turbine blade back taper feature machining - Google Patents
Cutter for turbine blade back taper feature machining Download PDFInfo
- Publication number
- CN109365890A CN109365890A CN201811505288.2A CN201811505288A CN109365890A CN 109365890 A CN109365890 A CN 109365890A CN 201811505288 A CN201811505288 A CN 201811505288A CN 109365890 A CN109365890 A CN 109365890A
- Authority
- CN
- China
- Prior art keywords
- cutter
- cone
- side edge
- turbine blade
- back taper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/12—Cutters specially designed for producing particular profiles
Abstract
The present invention provides a kind of cutters for turbine blade back taper feature machining, it can solve the existing problem that when processing turbine blade back taper feature jointly using plain milling cutter and taper ball head cutter, processing efficiency is low, processing cost is high, presentation quality qualification rate is low.It includes standard slotting cutter, standard slotting cutter includes shear blade and side edge, and in the shape of a spiral, the spiral of side edge is cone-type spiral to side edge, the screw diameter of cone-type spiral is gradually increased by upper end to the shear blade direction of side edge, and the semi-cone angle of cone-type spiral is less than or equal to the boss reversed cone angle of turbine blade.
Description
Technical field
The present invention relates to turbine Blade Machining field, specially a kind of knife for turbine blade back taper feature machining
Tool.
Background technique
As shown in Figure 1, the back taper feature of turbine blade is mainly made of raised head face 1 and boss inverted cone surface 2, α is convex
Platform reversed cone angle, alpha+beta=90 °.The position of back taper feature is in the blank forging stage due to the problems such as molding is difficult, detection is difficult, blank allowance
Larger, causing Pyramidal part long processing time in finished product process, cutter to consume, big, processing cost is high.
The back taper feature machining scheme now generallyd use in the industry is: in five-axle number control machine tool, first using the plane milling of very little
It is as shown in Figure 2 that knife 3 is layered Milling Machining raised head face 1(), then Milling Machining boss inverted cone surface 2(is layered as schemed with taper ball head cutter 4
Shown in 3).
Above scheme suffers from the drawback that the blank remnants surplus of 1) back taper characteristic portion is big, taper ball head Tool in Cutting
When, it is layered more, and is limited to cutter rigidity, cutting speed is also slow, causes that processing efficiency is low, and processing cost is high；2)
It is divided to two kinds of tool sharpening boss back taper features in five-axle number control machine tool, two knives have obvious machined trace (such as Fig. 4 and Fig. 5 institute
Show), cause boss characteristic look quality pass rate low；3) in process engineering, the respective manufacturing error of cutter of two knives, cutter are several
What size detection error, can be superimposed and aggravate the unqualified problem of back taper characteristic look, even result in the unqualified of size.
Summary of the invention
When processing turbine blade back taper feature jointly for existing use plain milling cutter and taper ball head cutter, processing effect
The technical problem that rate is low, processing cost is high, presentation quality qualification rate is low, the present invention provides one kind to be used for turbine blade back taper
The cutter of feature machining had not only been capable of processing raised head face but also had been capable of processing boss inverted cone surface, and high in machining efficiency, processing cost is low, and
Boss characteristic look quality problems can thoroughly be eliminated.
Its technical solution is such that a kind of cutter for turbine blade back taper feature machining comprising standard is vertical
Milling cutter, the standard slotting cutter include shear blade and side edge, and the side edge is in the shape of a spiral, it is characterised in that: the spiral of the side edge
Screw diameter for cone-type spiral, the cone-type spiral is gradually increased by upper end to the shear blade direction of the side edge, described
The semi-cone angle of cone-type spiral is less than or equal to the boss reversed cone angle of the turbine blade.
It is further characterized by:
The semi-cone angle of the cone-type spiral is equal to 4 °.
The semi-cone angle of the cone-type spiral is equal to 8 °.
The quantity of the shear blade and the side edge is equal and is greater than or equal to four.
The height of the side edge is greater than or equal to 10 mm.
Wear-resistant coating is coated on the side edge.
The beneficial effects of the present invention are:
Side edge helical design is cone-type spiral, and the spiral shell of cone-type spiral on the basis of standard slotting cutter by cutter of the invention
Rotation diameter is gradually increased by upper end to the shear blade direction of side edge, and the semi-cone angle of cone-type spiral is less than or equal to the convex of turbine blade
Platform reversed cone angle can be first using shear blade layering processing when the semi-cone angle of cone-type spiral is less than the boss reversed cone angle of turbine blade
Raised head face, then by adjusting the main shaft angle of five-axle number control machine tool, boss inverted cone surface is disposably processed using side edge, with one
Knife completes the processing of raised head face and boss inverted cone surface, when the semi-cone angle of cone-type spiral is equal to the boss reversed cone angle of turbine blade
When, then using the disposable simultaneous processing raised head face of this cutter and boss inverted cone surface, to completely eliminate due to using two
The machined trace that cutter is generated, while also eliminating due to using two manufacturing error of cutter, geometric dimension inspection etc. accidentally
Difference superposition bring dimensional instability problem, fundamentally improves the qualification rate of appearance and the stability of size, and process
Efficiency greatly improves；It is used for a long time through workshop, the rigidity and intensity of cutter of the invention will be much higher than traditional taper ball head knife
Tool, has greatly improved, while cutter life has clear improvement on cutting parameter and efficiency, the back taper feature machining drop of acquirement
The significant effect of this synergy.
Detailed description of the invention
Fig. 1 is the back taper feature structure schematic diagram of turbine blade；
Fig. 2 is the existing machining sketch chart that raised head face is processed with plain milling cutter；
Fig. 3 is the existing machining sketch chart with taper ball head tool sharpening boss inverted cone surface；
Fig. 4 is the existing machined trace schematic diagram caused by two tool sharpening boss back taper features；
Fig. 5 is the enlarged drawing of a-quadrant in Fig. 4；
Fig. 6 is the main view of cutter of the invention；
Fig. 7 is the right view of Fig. 6.
Specific embodiment
See Fig. 6 to Fig. 7, a kind of cutter for turbine blade back taper feature machining of the invention comprising standard is vertical
Milling cutter 11, standard slotting cutter include shear blade 12 and side edge 13, and shear blade 12 is equal with the quantity of side edge 13 and is greater than or equal to four, side
Sword 13 is in the shape of a spiral and spiral is cone-type spiral, the screw diameter of cone-type spiral by the upper end of side edge 13 to 12 direction of shear blade gradually
Increase, the semi-cone angle θ of cone-type spiral is less than or equal to the boss reversed cone angle α of turbine blade, and the height h of side edge 13 is greater than or waits
In 10 mm, it can satisfy the machining requirement of back taper feature, be coated with wear-resistant coating on side edge 13, making for cutter can be improved
Use the service life.The semi-cone angle θ of cone-type spiral may be designed as 4 ° or 8 ° or design according to boss reversed cone angle α.
Using tool sharpening turbine blade of the invention back taper feature when have following two scheme；
Scheme one: selecting semi-cone angle is 4 ° or 8 ° of cutter, and the half cone angle of cutter is less than the boss back taper of turbine blade
When angle, side edge can be used first using shear blade layering processing raised head face, then the angle that the main shaft beat of numerical control five-axle lathe is certain
Process boss inverted cone surface.
Scheme two, according to the cutter of boss back taper angle design specialized, even if the semi-cone angle of cone-type spiral is fallen equal to boss
Cone angle, then cutter of the invention can be used as forming cutter use, and simultaneous processing goes out raised head face and convex on numerical control five-axle lathe
Platform inverted cone surface, one-pass molding.
Claims (6)
1. a kind of cutter for turbine blade back taper feature machining comprising standard slotting cutter, the standard slotting cutter packet
Shear blade and side edge are included, the side edge is in the shape of a spiral, it is characterised in that: the spiral of the side edge is cone-type spiral, the taper spiral shell
The screw diameter of rotation is gradually increased by upper end to the shear blade direction of the side edge, the semi-cone angle of the cone-type spiral be less than or
Equal to the boss reversed cone angle of the turbine blade.
2. a kind of cutter for turbine blade back taper feature machining according to claim 1, it is characterised in that: described
The semi-cone angle of cone-type spiral is equal to 4 °.
3. a kind of cutter for turbine blade back taper feature machining according to claim 1, it is characterised in that: described
The semi-cone angle of cone-type spiral is equal to 8 °.
4. a kind of cutter for turbine blade back taper feature machining according to claim 1, it is characterised in that: described
The quantity of shear blade and the side edge is equal and is greater than or equal to four.
5. a kind of cutter for turbine blade back taper feature machining according to claim 1, it is characterised in that: institute
The height for stating side edge is greater than or equal to 10 mm.
6. a kind of cutter for turbine blade back taper feature machining according to claim 1, it is characterised in that: described
Wear-resistant coating is coated on side edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811505288.2A CN109365890A (en) | 2018-12-10 | 2018-12-10 | Cutter for turbine blade back taper feature machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811505288.2A CN109365890A (en) | 2018-12-10 | 2018-12-10 | Cutter for turbine blade back taper feature machining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109365890A true CN109365890A (en) | 2019-02-22 |
Family
ID=65373061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811505288.2A Pending CN109365890A (en) | 2018-12-10 | 2018-12-10 | Cutter for turbine blade back taper feature machining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109365890A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007319968A (en) * | 2006-05-31 | 2007-12-13 | Hitachi Tool Engineering Ltd | Formed cutter |
| KR100925118B1 (en) * | 2009-05-19 | 2009-11-05 | 신동기 | Wave end mil |
| CN204621171U (en) * | 2015-05-22 | 2015-09-09 | 锑玛(苏州)精密工具有限公司 | A kind of back taper tapering forming cutter |
| CN105414576A (en) * | 2015-12-31 | 2016-03-23 | 无锡透平叶片有限公司 | Cutter for cutting machining of blade lug boss characteristics |
| CN206241325U (en) * | 2016-12-09 | 2017-06-13 | 无锡航亚科技股份有限公司 | A kind of blade root arc surface finishing wire rod quality |
| CN206492972U (en) * | 2017-02-17 | 2017-09-15 | 成都交大普尔实业有限公司 | A kind of three axle lathe major part back taper milling cutters |
| CN209174982U (en) * | 2018-12-10 | 2019-07-30 | 无锡透平叶片有限公司 | A kind of cutter for turbine blade back taper feature machining |
-
2018
- 2018-12-10 CN CN201811505288.2A patent/CN109365890A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007319968A (en) * | 2006-05-31 | 2007-12-13 | Hitachi Tool Engineering Ltd | Formed cutter |
| KR100925118B1 (en) * | 2009-05-19 | 2009-11-05 | 신동기 | Wave end mil |
| CN204621171U (en) * | 2015-05-22 | 2015-09-09 | 锑玛(苏州)精密工具有限公司 | A kind of back taper tapering forming cutter |
| CN105414576A (en) * | 2015-12-31 | 2016-03-23 | 无锡透平叶片有限公司 | Cutter for cutting machining of blade lug boss characteristics |
| CN206241325U (en) * | 2016-12-09 | 2017-06-13 | 无锡航亚科技股份有限公司 | A kind of blade root arc surface finishing wire rod quality |
| CN206492972U (en) * | 2017-02-17 | 2017-09-15 | 成都交大普尔实业有限公司 | A kind of three axle lathe major part back taper milling cutters |
| CN209174982U (en) * | 2018-12-10 | 2019-07-30 | 无锡透平叶片有限公司 | A kind of cutter for turbine blade back taper feature machining |
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