CN113249728B - Hole wall defect repairing method and device for air film hole - Google Patents
Hole wall defect repairing method and device for air film hole Download PDFInfo
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- CN113249728B CN113249728B CN202110549497.2A CN202110549497A CN113249728B CN 113249728 B CN113249728 B CN 113249728B CN 202110549497 A CN202110549497 A CN 202110549497A CN 113249728 B CN113249728 B CN 113249728B
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- workpiece
- film hole
- hole
- gas film
- metal magnetic
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F3/00—Brightening metals by chemical means
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- 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
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
- B24B1/005—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes using a magnetic polishing agent
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- 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
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/10—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work
- B24B31/112—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work using magnetically consolidated grinding powder, moved relatively to the workpiece under the influence of pressure
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- 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
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/12—Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention provides a hole wall defect repairing method and device of a gas film hole, belonging to the field of machining and comprising the following steps: pretreating a workpiece to be treated with a processed air film hole, removing visible impurities on the surface, cleaning the surface, and immediately drying; step two: fixing the pretreated workpiece in a cylindrical container through a clamp, adding a certain amount of metal magnetic micro-needles, and adding polishing solution; step three: starting the motor, driving the cylindrical container to rotate by the rotating disk, starting the treatment, and stopping the motor after a period of time. Step four: and taking out the workpiece, cleaning the workpiece and drying. The invention can effectively remove the processing defects of a remelted layer, an oxidation layer, a heat affected zone and the like in the gas film hole, can remove the coating attached to the inner wall of the hole when a workpiece is recoated to block the gas film hole, can also remove the coating impurities in the gas film hole, can ensure that the gas film hole can meet the use requirement, and is convenient for more accurately observing the inside of the gas film hole.
Description
Technical Field
The invention relates to the field of laser manufacturing and processing, in particular to a hole wall defect repairing method and device suitable for air film holes such as air film holes of aviation turbine blades, air film holes of flame tubes, air film holes of aviation or automobile fuel nozzles and the like.
Background
Since the 90 s in the 20 th century, the film hole cooling technology is used as an effective cooling technology, and is combined with a thermal barrier coating technology, so that the material overcomes the toggle of the melting point of the material, and can still normally work under the condition that the working environment temperature is far higher than the melting point of the material. The aperture of the air film hole is usually 0.3-0.5mm, and the current manufacturing technology of the air film hole mainly comprises electric spark, electric liquid beam, laser, ultrafast laser and the like. After the gas film hole is processed by adopting a long pulse laser processing method, the inner wall of the hole has defects such as burrs, a remelted layer, microcracks, a heat affected zone and the like, and the performance of the gas film hole is affected. Moreover, when repairing damage to a workpiece having a gas film hole, the workpiece needs to be recoated, and the coating may adhere to the inner wall of the hole, which may partially block the gas film hole, resulting in failure of the workpiece to meet the use requirements. Meanwhile, when microscopic detection is carried out on parameters of the air film hole, due to the defects of the air film hole, actual parameters of the air film hole cannot be accurately measured, and the control on the real parameters of the air film hole is influenced.
Disclosure of Invention
In order to solve the problems, the invention provides a hole wall defect repairing method for a gas film hole, which removes the hole wall defects of the gas film hole or removes blocking impurities through a hole wall defect repairing technology of the gas film hole, so that the gas film hole has the best effect, simultaneously, the microstructure of the gas film hole can be mastered more accurately, and the method has important significance and wide application prospect for production practice.
A hole wall defect repairing method of a gas film hole comprises the following steps:
the method comprises the following steps: pretreating a workpiece to be treated with a processed air film hole, removing visible impurities on the surface, cleaning the surface, and immediately drying;
step two: fixing the pretreated workpiece in a cylindrical container through a clamp, adding a certain amount of metal magnetic micro-needles, and adding polishing solution;
step three: starting the motor, driving the cylindrical container to rotate by the rotating disk, starting the treatment, and stopping the motor after a period of time.
Step four: and taking out the workpiece, cleaning the workpiece and drying.
In the second step), the polishing solution overflows the pretreated workpiece, and the hardness of the metal micro-needle is less than that of the pretreated workpiece; meanwhile, the length of the metal magnetic micro-needle is far smaller than the inner diameter of the air film hole; the length of the metal magnetic micro-needle is 10 μm.
A repairing device for a hole wall defect repairing method of an air film hole comprises a cylindrical container, a rotating disk, a speed changing device and a motor; the cylindrical container is arranged on the rotating disc, the output end of the motor is connected with the input end of the speed changing device, and the output end of the speed changing device is connected with the rotating disc.
Further, the pretreated workpiece is clamped in the cylindrical container through a clamp; the cylindrical container is arranged on the rotating disc through a fixing piece.
The device mainly comprises a driving mechanism, a rack, a workpiece fixing and rotating mechanism and a metal magnetic microneedle.
The workpiece fixing and rotating mechanism is arranged on the rack, and the driving mechanism is located below the workpiece rotating mechanism.
The driving mechanism comprises a motor, a coupler, a speed changing device, a rotating disc and a fixing piece. The motor is connected with the speed change device through the coupler, and the rotating disc is connected with the speed change device through the fixing piece.
The workpiece fixing and rotating mechanism comprises a clamp for fixing a workpiece to be processed, a cylindrical container and a fixing piece. The cylindrical container is fixedly connected on the rotating disk through a fixing piece, and the clamp is arranged in the container and used for fixing the workpiece to be processed. Wherein the lower end of the cylindrical container is closed, and the upper end is provided with an opening so as to be convenient for placing workpieces, adding metal magnetic micro-needles, observing the processing state and the like.
The improved method for removing the hole wall defects of the air film hole comprises the following steps:
fixing a workpiece to be processed in the cylindrical container through a special fixture;
step (2), adding metal magnetic micro-needles and polishing liquid into the cylindrical container;
step (3), starting a motor, wherein a main shaft of the motor is connected with a rotating disc through a speed changing device to drive the cylindrical container to rotate rapidly;
and (4) stopping the motor and taking out the workpiece.
Has the beneficial effects that:
1. the metal magnetic micro-needle and the polishing solution enter the gas film hole under the action of inertia force and magnetic force to shear the defects, so that the hole wall defects are cut off, the inner wall of the gas film hole is smooth, impurities in the gas film hole are cleaned, and the purpose of removing the hole wall defects of the gas film hole is achieved.
2. The invention can effectively remove the processing defects of a remelted layer, an oxidation layer, a heat affected zone and the like in the gas film hole, can remove the coating attached to the inner wall of the hole when a workpiece is recoated to block the gas film hole, can also remove the coating impurities in the gas film hole, can ensure that the gas film hole can meet the use requirement, and is convenient for more accurately observing the inside of the gas film hole.
3. And removing defects in the hole by using polishing solution mixed with the metal magnetic micro needle so as to improve the quality of the inner wall of the gas film hole.
Drawings
FIG. 1 is a process flow diagram of a method for repairing defects on a wall of a gas film hole according to an embodiment of the present invention;
FIG. 2 is a schematic view of an operation principle of a hole wall defect repairing device of an air film hole according to an embodiment of the present invention;
FIG. 3 is a schematic view illustrating a processing principle of the device for repairing defects on a hole wall of an air film hole according to an embodiment of the present invention.
Reference numerals:
1-a cylindrical container; 2-rotating the disc; 3-a speed change device; 4-motor.
Detailed Description
In order to better illustrate the present invention and facilitate understanding, the technical solutions in the embodiments of the present invention are clearly and completely described below by way of specific embodiments in conjunction with the accompanying drawings in the embodiments of the present invention. Many of the details described below may be substituted with other processes to achieve the same objectives. Those skilled in the art may make similar changes without departing from the spirit of the invention, and therefore the invention is not limited to the specific implementations disclosed below.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
With reference to the attached drawings, the implementation process of the device for repairing the hole wall defect of the gas film hole comprises the following steps:
the method comprises the following steps: pretreating a workpiece to be treated with a processed air film hole, removing visible impurities on the surface, cleaning the surface, and immediately drying;
step two: fixing the pretreated workpiece in a cylindrical container by a special fixture, adding a certain amount of metal magnetic micro-needle with the length of about 10 mu m, and adding polishing solution. The polishing solution overflows the workpiece, the hardness of the metal micro-needle is smaller than that of the workpiece to be processed, so that the surface of the workpiece to be processed cannot be damaged when the metal magnetic micro-needle contacts the workpiece to be processed, meanwhile, the length of the metal magnetic micro-needle is far smaller than the inner diameter of the air film hole, and the metal magnetic micro-needle cannot be clamped inside the air film hole, so that the workpiece to be processed is cleaned conveniently.
Pretreating a workpiece to be treated, and fixing the workpiece in a specified container by using a clamp; adding the metal magnetic micro-needle and the polishing solution into a specified container; the starting motor rotates, and the designated container is driven to rotate through a series of devices, so that the metal magnetic micro-needle and the polishing solution enter the air film hole under the action of magnetic force and inertia force, and the purposes of removing the internal defect of the air film hole and removing impurities in the air film hole are achieved.
The length of the metal magnetic micro-needle is about 10 mu m, the metal hardness is smaller than that of a workpiece to be processed, the defects on the inner wall of the gas film hole are removed by utilizing the metal magnetic micro-needle and the polishing solution under the action of inertia force and magnetic force, and meanwhile, mixed impurities in the gas film hole are cleaned.
The device drives the rotating disc after the speed of the motor is changed, so that the designated container rotates, the polishing solution and the metal magnetic micro-needle are fully mixed in the air film hole, and meanwhile, the shearing force required for removing the hole wall defect is provided.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Claims (1)
1. A hole wall defect repairing method of a gas film hole is characterized by comprising the following steps:
the method comprises the following steps: pretreating a workpiece to be treated with a processed air film hole, removing visible impurities on the surface, cleaning the surface, and immediately drying;
step two: fixing the pretreated workpiece in a cylindrical container through a clamp, adding a certain amount of metal magnetic micro-needles, and adding polishing solution;
step three: starting a motor, driving the cylindrical container to rotate by the rotating disk, starting the treatment, and stopping the motor after a period of time;
step four: taking out the workpiece, cleaning the workpiece and drying;
in the second step, the polishing solution is overflowed through the pretreated workpiece, the hardness of the metal magnetic micro-needle is smaller than that of the pretreated workpiece, the length of the metal magnetic micro-needle is far smaller than the inner diameter of the air film hole, and specifically, the length of the metal magnetic micro-needle is 10 micrometers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110549497.2A CN113249728B (en) | 2021-05-20 | 2021-05-20 | Hole wall defect repairing method and device for air film hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110549497.2A CN113249728B (en) | 2021-05-20 | 2021-05-20 | Hole wall defect repairing method and device for air film hole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113249728A CN113249728A (en) | 2021-08-13 |
| CN113249728B true CN113249728B (en) | 2022-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110549497.2A Active CN113249728B (en) | 2021-05-20 | 2021-05-20 | Hole wall defect repairing method and device for air film hole |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105290950B (en) * | 2015-11-05 | 2017-12-01 | 西安航空动力股份有限公司 | A kind of turborotor air film hole aperture rounding method |
| TWM583789U (en) * | 2019-04-22 | 2019-09-21 | 豪昱電子有限公司 | Magnetic grinding machine |
| CN210849732U (en) * | 2019-10-14 | 2020-06-26 | 舟山海旺达五金制品有限公司 | Magnetic polishing machine for removing burrs of deep holes and inner holes of cavities of complex parts without dead angles |
| CN111570952A (en) * | 2020-05-09 | 2020-08-25 | 中国航发沈阳发动机研究所 | Air-cooled hollow blade air film hole inner wall sharp corner rounding device and method |
| CN112171184B (en) * | 2020-08-12 | 2021-10-12 | 江苏大学 | Composite machining method and device for blade air film hole |
| CN111872752A (en) * | 2020-09-09 | 2020-11-03 | 辽宁科技大学 | Vibration type permanent magnet polishing device |
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2021
- 2021-05-20 CN CN202110549497.2A patent/CN113249728B/en active Active
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| CN113249728A (en) | 2021-08-13 |
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