CN202622005U - Composite drill bit for machining filter screen of steam turbine set - Google Patents
Composite drill bit for machining filter screen of steam turbine set Download PDFInfo
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- CN202622005U CN202622005U CN 201220334578 CN201220334578U CN202622005U CN 202622005 U CN202622005 U CN 202622005U CN 201220334578 CN201220334578 CN 201220334578 CN 201220334578 U CN201220334578 U CN 201220334578U CN 202622005 U CN202622005 U CN 202622005U
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- filter screen
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- composite drill
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Abstract
The utility model relates to a composite drill bit for machining a filter screen of a steam turbine set. The utility model relates to a drill bit, in particular to a composite drill bit for machining a filter screen of a steam turbine set, which is used for solving the problems of the traditional way for machining the filter screen of the steam turbine set that the machining efficiency is low and the machining and manufacturing period is long. The composite drill bit comprises a cutter body and a cutter handle, wherein the cutter body and the cutter handle are coaxially connected with each other into a whole, the side wall of the cutter body is provided with a helical cutting edge along the circumferential direction, a second section is arranged between a first section and a third section, the first section, the second section and the third section are coaxially connected with one another into a whole, the first section is of a cylindrical shape, the second section is of a conical shape, the third section is of a cylindrical shape, the diameter of an outer circle of the first section is 7.1mm, a helical angle is 30 degrees, the diameter of an outer circle of the third section is 12mm, a helical angle is 40 degrees, a conical angle of a conical surface of the second section is 24 degrees, a cutting conical angle of the end part of the first section is 118 degrees, and a cutting surface is provided with a chip distributing groove with a chamfering angle of 1.2mm. The composite drill bit is used for machining the filter screen part of the steam turbine set.
Description
Technical field
The utility model relates to a kind of drill bit, is specifically related to a kind of processing vapor turbine unit filter screen and uses composite drill bit.
Background technology
Filter screen is one of steam turbine unit parts, is designed with more than 10,000 filtering holes on each filter screen, and this hole is a composite holes, is made up of 24 ° of taper holes of Φ 7.1 through holes and hole outer rim.Adopt conventional processing method: subdrilling Φ 7.1 through holes, cut with scissors 24 ° of taper holes again, the working (machining) efficiency in strainer filtering hole is lower, and the processing and manufacturing cycle of filtering net part is longer, can not satisfy the needs that steam turbine is produced.
The utility model content
The purpose of the utility model is to adopt existing steam turbine unit filter screen processing mode processing filter screen to exist the filter screen working (machining) efficiency lower for solving, the problem that the processing and manufacturing cycle is long, and then provide a kind of processing vapor turbine unit filter screen to use composite drill bit.
The utility model is to address the above problem the technical scheme of taking to be: a kind of processing vapor turbine unit filter screen of the utility model comprises cutter hub and handle of a knife with composite drill bit, and said cutter hub and handle of a knife are coaxial to link into an integrated entity, and it circumferentially is processed with spiral-shaped blade the sidewall upper edge of cutter hub; Said cutter hub constitutes by first section, second section and the 3rd section; Second section is positioned between first section and the 3rd section and the three is coaxial fuses, and the 3rd section is connected with handle of a knife, and first section be shaped as is cylindrical; Second section be shaped as truncated cone-shaped; The 3rd section be shaped as is cylindrical, and first section outside diameter is that the helical angle of 7.1mm is 30 °, and the 3rd section outside diameter is that the helical angle of 12mm is 40 °; The cone angle of second section the conical surface is 24 °; The conical surface of first section cylindrical and second section is consistent with the overanxious hole dimension of processed filter screen, and the taper lead angle of first section end is 118 °, and the cutting face is provided with the chip dividing groove that rounding is 1.2mm.
The beneficial effect of the utility model is: the processing filter screen of the utility model is used composite drill bit; Owing to adopt monolithic construction, promptly outside diameter is that first section cone angle with male cone (strobilus masculinus) of 7.1mm is that 24 ° second section is made into integration, and consistent with the overanxious hole dimension of processed filter screen; The cutting at one time that has guaranteed to be of a size of Φ 7.1mm and cone angle and be 24 ° filtering holes machines; Reduced exchanging knives process, improved working (machining) efficiency greatly, the filter screen processing and manufacturing cycle obviously shortens.The taper lead angle that the present invention is first section is 118 °, adopts the numerically control grinder grinding to form, and symmetrical precision reaches in the 0.02mm, and is designed with the chip dividing groove that rounding is 1.2mm, makes stable cutting, and chip breaking is effective, has improved the service life of composite drill bit.
Description of drawings
Fig. 1 is the overall structure front view of the utility model, and Fig. 2 is the left view of Fig. 1, and Fig. 3 is first section the relief angle sketch map of blade among Fig. 1, and Fig. 4 is second section the relief angle sketch map of blade among Fig. 1, and Fig. 5 is the vertical view of handle of a knife.
The specific embodiment
The specific embodiment one: combine Fig. 1-Fig. 5 that this embodiment is described; A kind of processing vapor turbine unit filter screen of this embodiment comprises cutter hub 1 and handle of a knife 2 with composite drill bit, said cutter hub 1 and handle of a knife 2 coaxial linking into an integrated entity, and it circumferentially is processed with spiral-shaped blade the sidewall upper edge of cutter hub 1; Said cutter hub 1 is made up of first section 1-1, second section 1-2 and the 3rd section 1-3; Second section 1-2 is between first section 1-1 and the 3rd section 1-3 and the three is coaxial fuses, and the 3rd section 1-3 is connected with handle of a knife 2, and being shaped as of first section 1-1 is cylindrical; Second section 1-2 is shaped as truncated cone-shaped; Being shaped as of the 3rd section 1-3 is cylindrical, and the outside diameter D1 of first section 1-1 is that the helixangle 1 of 7.1mm is 30 °, and the outside diameter D2 of the 3rd section 1-3 is that the helixangle 2 of 12mm is 40 °; The cone angle of the conical surface of second section 1-2 is 24 °; The conical surface of the cylindrical of first section 1-1 and second section 1-2 is consistent with the overanxious hole dimension of processed filter screen, and the taper lead angle β of the end of first section 1-1 is 118 °, and the cutting face is provided with the chip dividing groove that rounding r is 1.2mm.
First section the outside diameter of this embodiment is that the helical angle of 7.1mm is 30 °, so is provided with, and effectively improving the footpath diameter is the intensity of the cutter hub at 7.1mm cylindrical place.
The handle of a knife of this embodiment adopts No. 2 cones of Mohs, and tang is that 6.3mm transmits moment of torsion when being used for work in the handle of a knife, and handle of a knife and the coaxial manufacturing of blade cylindrical are with assurance hole machining accuracy.
The specific embodiment two: combine Fig. 3 that this embodiment is described, the relief angle γ of first section the blade of this embodiment is 16 °.The relief angle of this embodiment is 118 ° corresponding position for taper lead angle β.So be provided with, reduce cutting resistance, strengthen the chip breaking effect, satisfy actual needs.Other is identical with the specific embodiment one.
The specific embodiment three: combine Fig. 4 that this embodiment is described, the relief angle δ of second section the blade of this embodiment is 10 °.The relief angle of this embodiment is that cone angle is 24 ° round platform corresponding position.So be provided with, reduce cutting resistance, strengthen the chip breaking effect, satisfy actual needs.Other is identical with the specific embodiment one.
Claims (3)
1. a processing vapor turbine unit filter screen is used composite drill bit; It is characterized in that: said composite drill bit comprises cutter hub (1) and handle of a knife (2); Said cutter hub (1) and coaxial the linking into an integrated entity of handle of a knife (2); It circumferentially is processed with spiral-shaped blade the sidewall upper edge of cutter hub (1), and said cutter hub (1) is made up of first section (1-1), second section (1-2) and the 3rd section (1-3), and second section (1-2) is positioned between first section (1-1) and the 3rd section (1-3) and the three is coaxial fuses; The 3rd section (1-3) is connected with handle of a knife (2); Being shaped as of first section (1-1) is cylindrical, and second section (1-2) is shaped as truncated cone-shaped, and being shaped as of the 3rd section (1-3) is cylindrical; The outside diameter of first section (1-1) (D1) is 30 ° for the helical angle of 7.1mm (θ 1); The outside diameter (D2) of the 3rd section (1-3) is 40 ° for the helical angle of 12mm (θ 2), and the cone angle of the conical surface of second section (1-2) (α) is 24 °, and the conical surface of the cylindrical of first section (1-1) and second section (1-2) is consistent with the overanxious hole dimension of processed filter screen; The taper lead angle of the end of first section (1-1) (β) is 118 °, and the cutting face is provided with rounding (r) and is the chip dividing groove of 1.2mm.
2. a kind of processing vapor turbine unit filter screen according to claim 1 is used composite drill bit, and it is characterized in that: the relief angle of the blade of first section (1-1) (γ) is 16 °.
3. a kind of processing vapor turbine unit filter screen according to claim 1 is used composite drill bit, and it is characterized in that: the relief angle of the blade of second section (1-2) (δ) is 10 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220334578 CN202622005U (en) | 2012-07-11 | 2012-07-11 | Composite drill bit for machining filter screen of steam turbine set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220334578 CN202622005U (en) | 2012-07-11 | 2012-07-11 | Composite drill bit for machining filter screen of steam turbine set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202622005U true CN202622005U (en) | 2012-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220334578 Expired - Lifetime CN202622005U (en) | 2012-07-11 | 2012-07-11 | Composite drill bit for machining filter screen of steam turbine set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202622005U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104174905A (en) * | 2013-05-21 | 2014-12-03 | 苏州锑玛精密机械有限公司 | Diameter-reducing internal-cooled drill |
| CN110394484A (en) * | 2019-08-13 | 2019-11-01 | 厦门厦芝科技工具有限公司 | A kind of three apex angular bit heads |
-
2012
- 2012-07-11 CN CN 201220334578 patent/CN202622005U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104174905A (en) * | 2013-05-21 | 2014-12-03 | 苏州锑玛精密机械有限公司 | Diameter-reducing internal-cooled drill |
| CN110394484A (en) * | 2019-08-13 | 2019-11-01 | 厦门厦芝科技工具有限公司 | A kind of three apex angular bit heads |
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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: 20121226 |