CN113997020A - Machining method for reducing roughness of rectifier inner ring - Google Patents
Machining method for reducing roughness of rectifier inner ring Download PDFInfo
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- CN113997020A CN113997020A CN202111329297.2A CN202111329297A CN113997020A CN 113997020 A CN113997020 A CN 113997020A CN 202111329297 A CN202111329297 A CN 202111329297A CN 113997020 A CN113997020 A CN 113997020A
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- inner ring
- roughness
- machining method
- rectifier
- reducing
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- 238000003754 machining Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005520 cutting process Methods 0.000 claims abstract description 29
- 238000003672 processing method Methods 0.000 claims abstract description 6
- 238000005498 polishing Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 244000137852 Petrea volubilis Species 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/34—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of turning or planing tools or tool bits, e.g. gear cutters
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turning (AREA)
- Milling Processes (AREA)
Abstract
A processing method for reducing roughness of an inner ring of a rectifier comprises the following steps: step S1: sharpening the turning blade: sharpening the inclined cutting edges at the upper and lower sides of the tip of the turning blade to form a cutting tip with the upper and lower parallel shapes and the arc-shaped end part; step S2: turning the groove of the inner ring of the rectifier by using the turning blade with the edge ground in the step S1 to form a reticular texture, wherein adjacent cutting paths are arranged at intervals during cutting; step S3: the net-like texture cut in step S2 is polished with sandpaper to a roughness ra 12.5. The turning device utilizes the turning blade after the blade grinding to carry out turning, uses small tool tip radius, and increases the distance between the tool grains by faster feeding and rotating speed, thereby realizing the purpose of reducing the roughness of the groove of the inner ring of the rectifier. The machining method provided by the invention has high machining efficiency and can be widely applied to other similar parts needing roughness reduction on the aeroengine.
Description
Technical Field
The invention relates to the technical field of machining of inner rings of rectifiers of aero-engines, in particular to a machining method for reducing roughness of inner rings of rectifiers.
Background
The rectifier inner ring (shown in fig. 1) is an important part on an aircraft engine. The material is 2A70 aluminum alloy material, and the processing method mainly adopts numerical control lathing molding.
However, the rectifier inner ring is provided with two grooves, the two grooves belong to spraying contact surfaces, and the requirement of surface roughness is Ra12.5. This patent aims to be contrary to the traditional processing concept, requiring to obtain a poor roughness. If the conventional turning processing is adopted, the roughness can only be processed into Ra0.8-Ra3.2, the requirements of two grooves cannot be met, and the roughness of the grooves needs to be reduced.
Disclosure of Invention
The invention mainly aims to provide a processing method for reducing roughness of an inner ring of a rectifier, and aims to solve the technical problem.
In order to achieve the purpose, the invention provides a processing method for reducing roughness of an inner ring of a rectifier, which comprises the following steps:
step S1: sharpening the turning blade: sharpening the inclined cutting edges at the upper and lower sides of the tip of the turning blade to form a cutting tip with the upper and lower parallel shapes and the arc-shaped end part;
step S2: turning the groove of the inner ring of the rectifier by using the turning blade with the edge ground in the step S1 to form a reticular texture, wherein adjacent cutting paths are arranged at intervals during cutting;
step S3: the net-like texture cut in step S2 is polished with sandpaper to a roughness ra 12.5.
Preferably, in step S1, the cutting tip has a width of 0.5mm between the upper and lower sides thereof and an end portion arc radius of r0.2mm.
Preferably, in step S2, the distance between adjacent tool paths is 0.25mm, and the cutting depth is 0.1 mm.
Preferably, in the step S2, when the groove of the rectifier inner ring is turned, the turning is performed by alternately turning in a first feed manner and a second feed manner; the first feed mode is that the angle between the feed path and the rotating shaft of the part is positive; the second feeding mode is that the angle between the feeding route and the rotating shaft of the part is a negative angle.
Preferably, the first feed mode is that the angle between the feed route and the rotating shaft of the part is +45 degrees; the second feed mode is that the feed path and the rotating shaft of the part form an angle of 45 degrees.
Preferably, the cutting parameters of the first feeding mode are as follows: the rotating speed is 80r/min, and the feeding is 0.2-0.25 mm/min.
Preferably, the cutting parameters of the second feeding mode are as follows: the rotating speed is 80r/min, and the feeding is 0.2-0.25 mm/min.
Preferably, in step S3, the finishing and polishing is performed using #800 sandpaper.
Preferably, in step S2, a margin is left at the groove of the rectifier inner ring, and the margin is 0.2mm before the groove of the rectifier inner ring is turned.
The invention achieves the following beneficial effects:
(1) the turning device utilizes the turning blade after the blade grinding to carry out turning, uses small tool tip radius, and increases the distance between the tool grains by faster feeding and rotating speed, thereby realizing the purpose of reducing the roughness of the groove of the inner ring of the rectifier. The machining method provided by the invention has high machining efficiency and can be widely applied to other similar parts needing roughness reduction on the aeroengine.
(2) According to the invention, the turning blade is sharpened, so that the cutter cannot interfere with and collide with a part in the processing of the inner ring of the part. Meanwhile, the width between the upper side and the lower side of the cutting tip formed on the blade is 0.5mm, and the radius of the end circular arc is R0.2mm, so that a proper knife line can be conveniently machined, and the roughness of the part is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of a rectifier inner ring;
FIG. 2 is a schematic view of a turning blade configuration prior to being unsharpened;
FIG. 3 is a schematic view of the sharpened lathe blade;
FIG. 4 is a schematic view of a first feeding mode according to the present invention;
FIG. 5 is a schematic view of a second feeding mode according to the present invention;
fig. 6 is an enlarged schematic view of the turned surface.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Ra12.5 indicates that the arithmetic mean deviation of the heights of the points on the profile of the machined surface within the measuring range is not more than 12.5 micrometers. Taking five points of the detected roughness as an example, the height of each point is X1、X2、X3、X4、X5Average value is
Then
The method of the invention is to artificially manufacture the high and low points, so that the high and low points are relatively fixed in a limited width during detection, and then the detection method is used for obtaining lower roughness. The invention aims to reduce the roughness of the inner ring of the rectifier to Ra12.5.
A processing method for reducing roughness of an inner ring of a rectifier comprises the following steps:
step S1: sharpening the turning blade: sharpening the inclined cutting edges at the upper and lower sides of the tip of the turning blade to form a cutting tip with the upper and lower parallel shapes and the arc-shaped end part; the width between the upper side and the lower side of the cutting tip is 0.5mm, and the radius of an arc at the end part is R0.2mm; through carrying out the sharpening to turning tool piece, can realize that the cutter can not interfere with the part in the processing part inner ring, bump, simultaneously, the width between the upper and lower both sides of the cutting point through forming on the blade is 0.5mm, tip circular arc radius is R0.2mm, can more conveniently process out suitable sword line, and then reduce the roughness of part.
Step S2: and (3) before turning the groove of the inner ring of the rectifier, reserving a margin of 0.2mm at the groove of the inner ring of the rectifier, turning the groove of the inner ring of the rectifier by using the turning blade with the edge ground in the step S1 to form a net-shaped texture, wherein when cutting is carried out, adjacent cutter paths are arranged at intervals, specifically, the distance between the adjacent cutter paths is 0.25mm, the cutting depth is 0.1mm (the diameter is 0.2mm), and the purpose is that the size of the cut bottom reaches the final size requirement.
Step S3: and (4) repairing and polishing the net-shaped texture cut in the step S2 to roughness Ra12.5 by using #800 sand paper, wherein the polishing and repairing are used for polishing and removing burrs of local high points so as to enable the high points and the low points to be more uniform.
In this embodiment, in step S2, when the groove of the rectifier inner ring is turned, turning is performed by alternately using a first feeding manner and a second feeding manner; the first feed mode is that the angle between a feed route and a part rotating shaft is plus 45 degrees; the second feed mode is that the feed path and the rotating shaft of the part form an angle of 45 degrees. The cross turning is adopted to form the cutter grains with the reticulate pattern structure, the lowest point reaches the size requirement, the highest point is naturally formed in the cross turning, and the height between the lowest point and the highest point is about 0.025 mm. As shown in FIG. 6, the high and low points formed by cutting are calculated by arithmetic mean of roughness, and randomly take 10 points at a distance on the surface, the high point is 0.025mm, the low point is 0mm, and because the high and low points of the plane are artificially formed, the average is compared, the high point and the low point are respectively 5, the average value is 0.0125mm,
i.e. roughness ra 12.5.
The cutting parameters of the first feed mode and the second feed mode are as follows: the rotating speed is 80r/min, and the feeding is 0.2-0.25 mm/min. The purpose of high rotation speed and high feed is to make the surface rougher, because the cutter has larger cutting force to the part and the part texture is easier to extrude and form, i.e. rougher, under the high rotation speed feed. Conversely, the low rotation speed and the feeding roughness are good.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A processing method for reducing roughness of an inner ring of a rectifier is characterized by comprising the following steps:
step S1: sharpening the turning blade: sharpening the inclined cutting edges at the upper and lower sides of the tip of the turning blade to form a cutting tip with the upper and lower parallel shapes and the arc-shaped end part;
step S2: turning the groove of the inner ring of the rectifier by using the turning blade with the edge ground in the step S1 to form a reticular texture, wherein adjacent cutting paths are arranged at intervals during cutting;
step S3: the net-like texture cut in step S2 is polished with sandpaper to a roughness ra 12.5.
2. The machining method for reducing the roughness of the inner ring of the rectifier according to claim 1, wherein the machining method comprises the following steps: in step S1, the width between the upper and lower sides of the cutting tip is 0.5mm, and the radius of the end arc is r0.2mm.
3. The machining method for reducing the roughness of the inner ring of the rectifier according to claim 1, wherein the machining method comprises the following steps: in step S2, the distance between adjacent tool paths is 0.25 mm.
4. The machining method for reducing the roughness of the inner ring of the rectifier according to claim 1, wherein the machining method comprises the following steps: in step S2, the depth of cut of the tool path is 0.1 mm.
5. The machining method for reducing the roughness of the inner ring of the rectifier according to claim 1, wherein the machining method comprises the following steps: in the step S2, when the groove of the rectifier inner ring is turned, turning is performed in a staggered manner by adopting a first feed mode and a second feed mode; the first feed mode is that the angle between the feed path and the rotating shaft of the part is a positive angle; the second feeding mode is that the angle between the feeding route and the rotating shaft of the part is a negative angle.
6. The machining method for reducing the roughness of the inner ring of the rectifier according to claim 5, wherein the machining method comprises the following steps: the first feed mode is that the angle between a feed route and a part rotating shaft is plus 45 degrees; the second feed mode is that the feed path and the rotating shaft of the part form an angle of 45 degrees.
7. The machining method for reducing the roughness of the inner ring of the rectifier according to claim 5, wherein the machining method comprises the following steps: the cutting parameters of the first feed mode are as follows: the rotating speed is 80r/min, and the feeding is 0.2-0.25 mm/min.
8. The machining method for reducing the roughness of the inner ring of the rectifier according to claim 5, wherein the machining method comprises the following steps: the cutting parameters of the second feed mode are as follows: the rotating speed is 80r/min, and the feeding is 0.2-0.25 mm/min.
9. The machining method for reducing the roughness of the inner ring of the rectifier according to claim 1, wherein the machining method comprises the following steps: in step S3, a #800 sandpaper was used for buffing.
10. The machining method for reducing the roughness of the inner ring of the rectifier according to claim 1, wherein the machining method comprises the following steps: in step S2, a margin of 0.2mm is left at the groove of the rectifier inner ring before the groove of the rectifier inner ring is turned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111329297.2A CN113997020B (en) | 2021-11-10 | 2021-11-10 | Machining method for reducing roughness of inner ring of rectifier |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111329297.2A CN113997020B (en) | 2021-11-10 | 2021-11-10 | Machining method for reducing roughness of inner ring of rectifier |
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| CN113997020B CN113997020B (en) | 2024-04-26 |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB659891A (en) * | 1949-01-01 | 1951-10-31 | Birmingham Small Arms Co Ltd | Improvements in or relating to cutters for metals |
| US6712564B1 (en) * | 2000-09-29 | 2004-03-30 | Greenleaf Technology Corporation | Tool with improved resistance to displacement |
| US20080245226A1 (en) * | 2004-12-10 | 2008-10-09 | Nissan Motor Co., Ltd. | Cutting Tools and Roughened Articles Using Surface Roughening Methods |
| CN101928908A (en) * | 2009-06-25 | 2010-12-29 | 福特全球技术公司 | The workpiece and the IC engine cylinder body on the surface that metallic surface method of roughening, tool are recessed into |
| KR20110085057A (en) * | 2010-01-19 | 2011-07-27 | 임채권 | Surface teratment method of roller with abrasion resistance and frictional resistance, and roller produced by the method |
| JP2018149616A (en) * | 2017-03-10 | 2018-09-27 | 株式会社東京精密 | Blade manufacturing method |
| CN108620813A (en) * | 2017-03-17 | 2018-10-09 | 宁波江丰电子材料股份有限公司 | Target blankss and its processing method |
| US20190358756A1 (en) * | 2018-05-25 | 2019-11-28 | Man Energy Solutions Se | Guide Baffle Of A Turbomachine And Method For Producing The Same |
| KR20200046413A (en) * | 2018-10-24 | 2020-05-07 | 세보테크 주식회사 | Surface treatment method for improvement surface roughness of plank of helideck |
| CN111299973A (en) * | 2020-03-11 | 2020-06-19 | 重庆西南铝机电设备工程有限公司 | Texturing treatment process for rubber roller |
| JP2021110389A (en) * | 2020-01-09 | 2021-08-02 | 本田技研工業株式会社 | Belt-type continuously variable transmission and its manufacturing method |
-
2021
- 2021-11-10 CN CN202111329297.2A patent/CN113997020B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB659891A (en) * | 1949-01-01 | 1951-10-31 | Birmingham Small Arms Co Ltd | Improvements in or relating to cutters for metals |
| US6712564B1 (en) * | 2000-09-29 | 2004-03-30 | Greenleaf Technology Corporation | Tool with improved resistance to displacement |
| US20080245226A1 (en) * | 2004-12-10 | 2008-10-09 | Nissan Motor Co., Ltd. | Cutting Tools and Roughened Articles Using Surface Roughening Methods |
| CN101928908A (en) * | 2009-06-25 | 2010-12-29 | 福特全球技术公司 | The workpiece and the IC engine cylinder body on the surface that metallic surface method of roughening, tool are recessed into |
| KR20110085057A (en) * | 2010-01-19 | 2011-07-27 | 임채권 | Surface teratment method of roller with abrasion resistance and frictional resistance, and roller produced by the method |
| JP2018149616A (en) * | 2017-03-10 | 2018-09-27 | 株式会社東京精密 | Blade manufacturing method |
| CN108620813A (en) * | 2017-03-17 | 2018-10-09 | 宁波江丰电子材料股份有限公司 | Target blankss and its processing method |
| US20190358756A1 (en) * | 2018-05-25 | 2019-11-28 | Man Energy Solutions Se | Guide Baffle Of A Turbomachine And Method For Producing The Same |
| KR20200046413A (en) * | 2018-10-24 | 2020-05-07 | 세보테크 주식회사 | Surface treatment method for improvement surface roughness of plank of helideck |
| JP2021110389A (en) * | 2020-01-09 | 2021-08-02 | 本田技研工業株式会社 | Belt-type continuously variable transmission and its manufacturing method |
| CN111299973A (en) * | 2020-03-11 | 2020-06-19 | 重庆西南铝机电设备工程有限公司 | Texturing treatment process for rubber roller |
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| CN113997020B (en) | 2024-04-26 |
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