CN113997020B - Machining method for reducing roughness of inner ring of rectifier - Google Patents
Machining method for reducing roughness of inner ring of rectifier Download PDFInfo
- Publication number
- CN113997020B CN113997020B CN202111329297.2A CN202111329297A CN113997020B CN 113997020 B CN113997020 B CN 113997020B CN 202111329297 A CN202111329297 A CN 202111329297A CN 113997020 B CN113997020 B CN 113997020B
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- Prior art keywords
- rectifier
- inner ring
- turning
- roughness
- feeding
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- 238000000034 method Methods 0.000 title claims description 12
- 238000003754 machining Methods 0.000 title description 5
- 238000005520 cutting process Methods 0.000 claims abstract description 29
- 238000005498 polishing Methods 0.000 claims abstract description 8
- 238000003672 processing method Methods 0.000 claims abstract description 7
- 244000137852 Petrea volubilis Species 0.000 claims abstract description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 241000287196 Asthenes 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
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
- Turning (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 on the upper side and the lower side of the tip of the turning blade to form a cutting tip with parallel upper and lower sides and arc end parts; step S2: turning grooves of the inner ring of the rectifier by adopting the turning tool blade which is sharpened in the step S1 to form net textures, wherein adjacent tool paths are arranged at intervals during cutting; step S3: and (3) polishing the net texture turned in the step (S2) by sand paper until the roughness is Ra12.5. The invention uses the turning tool blade after sharpening to carry out turning, uses a small tool nose radius, increases the distance between tool grains with faster feeding and rotating speed, and realizes the purpose of reducing the roughness of the groove of the inner ring of the rectifier. The processing method provided by the invention has high processing efficiency and can be widely applied to other similar parts needing to reduce roughness on the aeroengine.
Description
Technical Field
The invention relates to the technical field of machining of inner rings of rectifiers of aeroengines, in particular to a machining method for reducing roughness of inner rings of rectifiers.
Background
The inner rectifier ring (as shown in fig. 1) is an important part on an aeroengine. The material is 2A70 aluminum alloy material, and the processing method mainly adopts numerical control turning for processing and forming.
But the rectifier inner ring is provided with two grooves which belong to the spraying contact surface, and the required surface roughness is Ra12.5. This patent aims at contrary to the traditional processing concept, and it is necessary to obtain a poor roughness. If conventional turning 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 problems.
In order to achieve the above object, the present invention provides a method for processing a rectifier inner ring to reduce roughness, comprising the following steps:
step S1: sharpening the turning blade: sharpening the inclined cutting edges on the upper side and the lower side of the tip of the turning blade to form a cutting tip with parallel upper and lower sides and arc end parts;
Step S2: turning grooves of the inner ring of the rectifier by adopting the turning tool blade which is sharpened in the step S1 to form net textures, wherein adjacent tool paths are arranged at intervals during cutting;
step S3: and (3) polishing the net texture turned in the step (S2) by sand paper until the roughness is Ra12.5.
Preferably, 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.
Preferably, in step S2, the distance between adjacent tool paths is 0.25mm, and the cutting depth is 0.1mm.
Preferably, in the step S2, when turning the groove of the inner ring of the rectifier, turning is performed in a staggered manner by adopting a first feeding mode and a second feeding mode; the first feeding mode is that the feeding route is in positive angle with the angle of the part rotating shaft; 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 feeding mode is that the angle between a feeding route and a part rotating shaft is +45°; the second feeding mode is that the angle between the feeding route and the rotating shaft of the part is-45 degrees.
Preferably, the cutting parameters of the first feeding mode are: the rotating speed is 80r/min, and the feeding speed is 0.2-0.25mm/min.
Preferably, the cutting parameters of the second feeding mode are: the rotating speed is 80r/min, and the feeding speed is 0.2-0.25mm/min.
Preferably, in step S3, #800 sandpaper is used for polishing.
Preferably, in the step S2, a margin is left at the groove of the inner ring of the rectifier, and the margin is 0.2mm before the groove of the inner ring of the rectifier is turned.
The invention has the beneficial effects that:
(1) The invention uses the turning tool blade after sharpening to carry out turning, uses a small tool nose radius, increases the distance between tool grains with faster feeding and rotating speed, and realizes the purpose of reducing the roughness of the groove of the inner ring of the rectifier. The processing method provided by the invention has high processing efficiency and can be widely applied to other similar parts needing to reduce roughness on the aeroengine.
(2) According to the invention, the cutter can be prevented from interfering with the part in the process of machining the part by sharpening the turning tool piece. Meanwhile, the width between the upper side and the lower side of the cutting tip formed on the blade is 0.5mm, the arc radius of the end part is R0.2mm, and the proper cutter grain can be machined conveniently, so that 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 that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of an inner ring of a rectifier;
FIG. 2 is a schematic illustration of the blade configuration prior to sharpening;
FIG. 3 is a schematic view of a sharpened turning blade configuration;
FIG. 4 is a schematic diagram of a first feeding method according to the present invention;
FIG. 5 is a schematic diagram of a second feeding mode according to the present invention;
Fig. 6 is an enlarged schematic view of the surface after the turning.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Ra12.5 means that the arithmetic mean deviation of the heights of the points on the profile of the machined surface over the measuring range is not more than 12.5 microns. Taking five points of the detected roughness as examples, the heights of each point are X 1、X2、X3、X4、X5 respectively, and the average value is recorded asThen/>The method of the invention is to artificially manufacture the high and low points, so that the high and low points are relatively fixed within a limited width during detection, and then the lower roughness is obtained by the detection method. The invention aims to reduce the roughness of the inner ring of a 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 on the upper side and the lower side of the tip of the turning blade to form a cutting tip with parallel upper and lower sides and arc end parts; the width between the upper side and the lower side of the cutting tip is 0.5mm, and the radius of the arc at the end part is R0.2mm; through carrying out sharpening to the lathe tool piece, can realize that the cutter can not interfere with the part in processing part inner ring, bump, simultaneously, through the width of being 0.5mm between the cutting tip upper and lower both sides that forms on the blade, tip circular arc radius is R0.2mm, can more conveniently process out suitable cutter line, and then reduce the roughness of part.
Step S2: before turning the groove of the inner ring of the rectifier, allowance is reserved at the groove of the inner ring of the rectifier, the allowance is 0.2mm, the turning tool piece which is sharpened in the step S1 is adopted to turn the groove of the inner ring of the rectifier, net textures are formed, when cutting is carried out, adjacent tool paths are arranged at intervals, specifically, the distance between the adjacent tool paths is 0.25mm, the cutting depth is 0.1mm (diameter cutting is 0.2 mm), and the purpose is that the cutting bottom size reaches the final size requirement.
Step S3: and (2) polishing the net texture turned in the step (S2) to the roughness Ra12.5 by adopting #800 sand paper, wherein polishing is used for polishing burrs of local high points, so that the high points and the low points are more uniform.
In this embodiment, in the step S2, when turning the groove of the inner ring of the rectifier, the turning is performed in a staggered manner by adopting a first feeding manner and a second feeding manner; the first feeding mode is that the angle between a feeding route and a part rotating shaft is +45°; the second feeding mode is that the angle between the feeding route and the rotating shaft of the part is-45 degrees. The reticulate pattern structure tool grain is formed through staggered turning, the lowest point reaches the size requirement, the highest point is naturally formed in the staggered turning, and the height of the lowest point and the highest point is about 0.025mm. As shown in FIG. 6, the high and low points formed by cutting are calculated by arithmetical average of roughness, 10 points at a distance are randomly taken as an example 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, 5 high points and low points are respectively, the average value is 0.0125mm,I.e. the roughness ra 12.5.
The cutting parameters of the first feeding mode and the second feeding mode are as follows: the rotating speed is 80r/min, and the feeding speed is 0.2-0.25mm/min. The purpose of high rotation speed and high feeding is to make the surface rougher, because at high rotation speed feeding, the cutting force of the cutter on the part is larger, and the texture of the part is easier to squeeze and form, namely rougher. Conversely, low rotation speed and feeding roughness are good.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (5)
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 on the upper side and the lower side of the tip of the turning blade to form a cutting tip with parallel upper and lower sides and arc end parts; the width between the upper side and the lower side of the cutting tip is 0.5mm, and the radius of the arc at the end part is R0.2mm;
Step S2: turning the groove of the inner ring of the rectifier by adopting the turning tool blade which is sharpened in the step S1 to form a net texture, wherein adjacent tool paths are arranged at intervals during cutting, and the distance between the adjacent tool paths is 0.25mm; the cutting depth of the cutter path is 0.1mm;
step S3: repairing and polishing the net texture turned in the step S2 by sand paper until the roughness Ra12.5 is reached;
In the step S2, when the groove of the inner ring of the rectifier is turned, the first feeding mode and the second feeding mode are adopted for staggered turning; the first feeding mode is that the angle between a feeding route and a part rotating shaft 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; the first feeding mode is that the angle between a feeding route and a part rotating shaft is +45°; the second feeding mode is that the angle between the feeding route and the rotating shaft of the part is-45 degrees.
2. A method of reducing roughness for an inner ring of a rectifier as in claim 1, wherein: the cutting parameters of the first feeding mode are as follows: the rotating speed is 80r/min, and the feeding speed is 0.2-0.25mm/min.
3. A method of reducing roughness for an inner ring of a rectifier as in claim 1, wherein: the cutting parameters of the second feeding mode are as follows: the rotating speed is 80r/min, and the feeding speed is 0.2-0.25mm/min.
4. A method of reducing roughness for an inner ring of a rectifier as in claim 1, wherein: in step S3, the #800 sand paper is adopted for polishing.
5. A method of reducing roughness for an inner ring of a rectifier as in claim 1, wherein: in the step S2, a margin is left at the groove of the inner ring of the rectifier, and the margin is 0.2mm before turning the groove of the inner ring of the rectifier.
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| 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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| CN202111329297.2A CN113997020B (en) | 2021-11-10 | 2021-11-10 | Machining method for reducing roughness of inner ring of rectifier |
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| CN113997020A CN113997020A (en) | 2022-02-01 |
| CN113997020B true CN113997020B (en) | 2024-04-26 |
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Citations (5)
| 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 |
| 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 |
| 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 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4093228B2 (en) * | 2004-12-10 | 2008-06-04 | 日産自動車株式会社 | Roughening method and cutting tool |
| DE102009027200B3 (en) * | 2009-06-25 | 2011-04-07 | Ford Global Technologies, LLC, Dearborn | Method for roughening metal surfaces, use of the method and workpiece |
| 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 |
| JP6893312B2 (en) * | 2017-03-10 | 2021-06-23 | 株式会社東京精密 | Blade manufacturing method |
| DE102018112562A1 (en) * | 2018-05-25 | 2019-11-28 | Man Energy Solutions Se | Grille of a turbomachine and method for producing the same |
| JP7398282B2 (en) * | 2020-01-09 | 2023-12-14 | 本田技研工業株式会社 | Belt type continuously variable transmission and its manufacturing method |
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2021
- 2021-11-10 CN CN202111329297.2A patent/CN113997020B/en active Active
Patent Citations (5)
| 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 |
| 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 |
| 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 |
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| CN113997020A (en) | 2022-02-01 |
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