CN101829804B - Pulley-groove finish-milling compound milling cutter - Google Patents
Pulley-groove finish-milling compound milling cutter Download PDFInfo
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- CN101829804B CN101829804B CN2010101861866A CN201010186186A CN101829804B CN 101829804 B CN101829804 B CN 101829804B CN 2010101861866 A CN2010101861866 A CN 2010101861866A CN 201010186186 A CN201010186186 A CN 201010186186A CN 101829804 B CN101829804 B CN 101829804B
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Abstract
The invention relates to a pulley-groove finish-milling compound milling cutter belonging to the technical field of machine manufacturing. The compound milling cutter comprises a handle, a chip groove and a cutting part, wherein the cutting part is arranged on the top end of the handle, the chip groove is penetrated through the cutting part, the cutting part is provided with a plurality of cutting edges, the cross sectional areas of the cutting edges are orderly decreased from the top end of the handle at a rate of 25%, the rear cutter face of each cutting edge is provided with an edge strip of which the width is 0.15-0.3mm, the helical angle of the chip groove is 0 degree, and the front angle of the cutting part is 0 degree. The invention develops a fir tree-type pulley-groove finish-milling compound milling cutter for a 1000MW large steam turbine, and combines the original-process V-shaped rough milling cutter, the deepening milling cutter and semi-finish milling cutter into one to simultaneously complete rough machining and semi-finishing, thereby raising the production efficiency and lowering the cost.
Description
Technical field
What the present invention relates to is a kind of cutter of machinery manufacturing technology field, in particular a kind of pulley-groove finish-milling compound milling cutter that is used to process the 1000MW turbine rotor.
Background technology
Turbine rotor bears complicated load as its core part under the working environment of harshness, thereby the part processing surface quality is had strict requirement.The powerful turbine rotor unit of 1000MW has clear and definite index request to final stage race machined surface layer residual stress; Promptly has the 300MPa residual compressive stress at final stage race root 0.5mm place; The existence of residual compressive stress can be offset the rotor high-speed rotary centrifugal force, to improve the bearing capacity and the fatigue resistance of part.This is again a challenge to the race processing technology undoubtedly.China does not have suitable large scale Milling Cutter with Fir-slot, does not have 1000MW steam turbine last stage fir-tree type race technology deposit yet.
The turbine rotor of the high-power unit of 1000MW adopts fir-tree type race structure, the milling processing and forming, thereby the fir-type blade wheel groove milling cutter becomes the cutter equipment technology that the steam turbine manufacturing receives much concern, and directly reflects the turbo rotor groove level of processing.Wheel slotting cutter cutting state is more complicated than plain cutter, and cutter life is short, and consumption is big, and the improvement of taking turns slotting cutter promotes the direct driving force of race process technology progress often.
Retrieval through to prior art is found; China's utility model patent publication number: CN2853244; Title: the oblique semi-precise milling cutter for concave groove patent of positive rake angle; This technology readme: adjacent two tooth chip dividing grooves are tree-shaped Christmas of axially staggering, and have the chip dividing groove that taper-shank cutter blade toothed surfaces staggered rows is shown the rear foot.China's utility model patent publication number: CN201030451, title: steam turbine wheel slot wave sword profile milling cutter, this technology readme comprises cutter hub, and cutter hub is provided with cutting edge, and the outer surface of cutting edge is provided with the waveform chip-breaker.
Above-mentioned two parts of documents all relate to race milling cutter method for designing and milling process.But the cutter and the technology problem that all relate in the mill to 600MW and level steam turbine such as following.Along with riseing of single-machine capacity, the race crudy is had higher requirement.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art; A kind of pulley-groove finish-milling compound milling cutter is provided, substitutes finishing cutter and roll extrusion process, directly accomplish precision cutting processing and plastic forming squeezing effect; Introduce residual compressive stress at cutting process, satisfy the Element Design requirement.
The present invention realizes through following technical scheme, the present invention includes: shank, chip area and cutting portion, and the top of shank is provided with cutting portion; Chip area runs through to be located on the cutting portion; Described cutting portion is provided with several blades, and the area of section of blade successively decreases by 25% from the top of shank successively, and the back knife face of blade is provided with the land that width is 0.15mm～0.3mm; The helical angle of chip area is 0 degree, and the anterior angle of cutting portion is 0 degree.
Angle between the described blade equates.
The width of described chip area be blade width 1/3, chip area is parallel with tool axis.
Described shank and cutting portion are fine grain powder high speed steel materials, apply rich aluminium laminated coating on the cutting portion.
The hardness of said coating is greater than 38Gpa, and oxidation resistance temperature is greater than 800 ℃, and the coating adhesion is greater than DIN50103/1HF2.
The present invention compares prior art and has the following advantages: because the back knife face is provided with 0.15mm～0.3mm land, make that the back knife face forms squeezing action to the surface of the work of having processed in the working angles, introduce residual compressive stress through working angles; Rich aluminized coating is given security for realizing high-speed cutting, and good heat endurance makes cutting speed increase substantially; 0 degree anterior angle design has guaranteed the intensity that cutter is enough, and 0 degree helical angle guarantees that machined surface forms at synchronization, avoids cutting edge progressively to cut and carries out secondary effect to processing surface residual stress; Exploitation 1000MW large-size steam turbine fir-tree type pulley-groove finish-milling compound milling cutter is realized the three cuttves unification of former technology V-type roughing milling cutter, intensification milling cutter and half finish-milling cutter, accomplishes roughing and semifinishing simultaneously, enhances productivity, and reduces cost.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a side view of the present invention.
The specific embodiment
Elaborate in the face of embodiments of the invention down, present embodiment provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment being to implement under the prerequisite with technical scheme of the present invention.
As depicted in figs. 1 and 2, present embodiment comprises: shank 1, cutting portion 2 and chip area 3, and wherein: the top of shank 1 is provided with cutting portion 2; Chip area 3 links to each other with shank; Cutting portion 2 has 4, is arranged on shank 1 top uniformly, and the angle between each cutting portion 2 is 90 degree.
The area of section that described cutting portion 2 is provided with three sections continuous 4, three sections blades 4 of curve blade successively decreases by 25% rule from the top of shank 1 successively.
This cutter is called the Christmas tree milling cutter again, and the anterior angle of cutting portion 2 is 0 degree.Angle theta between the blade 4 equates that the size of angle is 67 degree.The width of chip area 3 be blade 4 width 1/3, the helical angle of chip area 3 be 0 the degree.The back knife face of blade 4 is provided with land 5, and the width Delta s of land 5 is 0.15mm～0.3mm.Shank 1 is that fine grain powder high-speed steel is processed with cutting portion 2, the rich aluminized coating of coated with multiple layer on the cutting portion 2.The hardness of coating is greater than 38Gpa, and oxidation resistance temperature is greater than 800 ℃, and the coating adhesion is greater than DIN DIN50103/1HF2.
During present embodiment work, squeezing action is carried out on the surface that when accomplishing accurate milling, workpiece has been processed, substitutes original milling earlier and afterwards rolls technology.
Claims (3)
1. a pulley-groove finish-milling compound milling cutter comprises shank, chip area and cutting portion, and the top of shank is provided with cutting portion; Chip area runs through to be located on the cutting portion; It is characterized in that: described cutting portion is provided with several blades, and the area of section of blade successively decreases by 25% from the top of shank successively, and the back knife face of blade is provided with the land that width is 0.15mm～0.3mm; The helical angle of chip area is 0 degree, and the anterior angle of cutting portion is 0 degree;
The width of described chip area be blade width 1/3, chip area is parallel with tool axis.
2. pulley-groove finish-milling compound milling cutter according to claim 1 is characterized in that, described shank and cutting portion are fine grain powder high speed steel materials.
3. according to claim 1 or 2 described pulley-groove finish-milling compound milling cutters, it is characterized in that, apply rich aluminium laminated coating on the described cutting portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101861866A CN101829804B (en) | 2010-05-28 | 2010-05-28 | Pulley-groove finish-milling compound milling cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101861866A CN101829804B (en) | 2010-05-28 | 2010-05-28 | Pulley-groove finish-milling compound milling cutter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101829804A CN101829804A (en) | 2010-09-15 |
| CN101829804B true CN101829804B (en) | 2012-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101861866A Active CN101829804B (en) | 2010-05-28 | 2010-05-28 | Pulley-groove finish-milling compound milling cutter |
Country Status (1)
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| CN (1) | CN101829804B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102717138A (en) * | 2012-06-01 | 2012-10-10 | 上海交通大学 | Re-constructable formed milling cutter for fine machining of circular-arc-shaped curved mortise of wheel disc |
| CN105710426B (en) * | 2016-04-08 | 2018-05-22 | 哈尔滨汽轮机厂有限责任公司 | A kind of processing method of large size semi-precise milling cutter for concave groove |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1163809A (en) * | 1996-03-22 | 1997-11-05 | 沃尔特公开股份有限公司 | Method and apparatus for producing undercut grooves |
| US5908269A (en) * | 1997-08-05 | 1999-06-01 | Siemens Westinghouse Power Corporation | Helical cutter geometry for a cutting tool used to manufacture turbine rotors |
| US6164877A (en) * | 1998-03-20 | 2000-12-26 | Osg Corporation | Formed rotary cutting tool having varying diameter and constant clearance angle, and method of forming groove by using the same |
| JP2005169513A (en) * | 2003-12-08 | 2005-06-30 | Ebisuya Kogu Seisakusho:Kk | Rotary cutting tool for rough cutting, and its manufacturing method |
| JP2007175830A (en) * | 2005-12-28 | 2007-07-12 | Osg Corp | Christmas tree formed milling cutter |
| CN201316831Y (en) * | 2008-12-01 | 2009-09-30 | 哈尔滨汽轮机厂有限责任公司 | Precise milling cutter for concave groove |
-
2010
- 2010-05-28 CN CN2010101861866A patent/CN101829804B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1163809A (en) * | 1996-03-22 | 1997-11-05 | 沃尔特公开股份有限公司 | Method and apparatus for producing undercut grooves |
| US5908269A (en) * | 1997-08-05 | 1999-06-01 | Siemens Westinghouse Power Corporation | Helical cutter geometry for a cutting tool used to manufacture turbine rotors |
| US6164877A (en) * | 1998-03-20 | 2000-12-26 | Osg Corporation | Formed rotary cutting tool having varying diameter and constant clearance angle, and method of forming groove by using the same |
| JP2005169513A (en) * | 2003-12-08 | 2005-06-30 | Ebisuya Kogu Seisakusho:Kk | Rotary cutting tool for rough cutting, and its manufacturing method |
| JP2007175830A (en) * | 2005-12-28 | 2007-07-12 | Osg Corp | Christmas tree formed milling cutter |
| CN201316831Y (en) * | 2008-12-01 | 2009-09-30 | 哈尔滨汽轮机厂有限责任公司 | Precise milling cutter for concave groove |
Non-Patent Citations (2)
| Title |
|---|
| 周月香.高精度燃气轮机轮槽的铣削加工.《热力透平》.2007,第36卷(第2期),第138-140页. * |
| 徐艳.枞树型轮槽铣刀的设计与应用.《汽轮机技术》.2001,第43卷(第6期),第379-381页. * |
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| Publication number | Publication date |
|---|---|
| CN101829804A (en) | 2010-09-15 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20100915 Assignee: CHANGZHOU HAILI TOOL CO., LTD. Assignor: Shanghai Jiao Tong University Contract record no.: 2018320000216 Denomination of invention: Pulley-groove finish-milling compound milling cutter Granted publication date: 20120104 License type: Common License Record date: 20181022 |