CN113977109A - Machining method for finger tip sealing piece of aero-engine - Google Patents
Machining method for finger tip sealing piece of aero-engine Download PDFInfo
- Publication number
- CN113977109A CN113977109A CN202111535212.6A CN202111535212A CN113977109A CN 113977109 A CN113977109 A CN 113977109A CN 202111535212 A CN202111535212 A CN 202111535212A CN 113977109 A CN113977109 A CN 113977109A
- Authority
- CN
- China
- Prior art keywords
- fingertip
- processing
- vacuum
- fingertip sealing
- sealing piece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 124
- 238000000034 method Methods 0.000 title claims description 21
- 238000003754 machining Methods 0.000 title claims description 10
- 238000001179 sorption measurement Methods 0.000 claims abstract description 72
- 239000002994 raw material Substances 0.000 claims abstract description 26
- 238000005520 cutting process Methods 0.000 claims abstract description 24
- 238000003672 processing method Methods 0.000 claims abstract description 13
- 238000009826 distribution Methods 0.000 claims abstract description 10
- 238000005516 engineering process Methods 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims description 11
- 230000003584 silencer Effects 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 239000012720 thermal barrier coating Substances 0.000 claims description 6
- 230000006378 damage Effects 0.000 abstract description 6
- 238000007373 indentation Methods 0.000 abstract description 6
- 208000027418 Wounds and injury Diseases 0.000 abstract description 2
- 208000014674 injury Diseases 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000608 laser ablation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009763 wire-cut EDM Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a processing method of a fingertip sealing sheet of an aero-engine, which comprises the following steps: installing and positioning the fingertip sealing piece raw material to be processed by adopting an air source vacuum adsorption positioning mode; adopt ultrafast laser galvanometer scanning mode according to predetermineeing the scanning processing orbit to combine the supplementary technology of vacuum environment to treat processing fingertip seal piece raw materials and carry out cutting process, predetermine the scanning processing orbit and include: firstly, cutting and processing a fingertip wire groove of the fingertip sealing piece according to a 9-segment line distribution deformation control processing mode, then cutting and processing an outer circle of the fingertip sealing piece, and finally cutting and processing an inner circle of the fingertip sealing piece. The high-quality processing of the fingertip sealing piece can be realized, the fingertip sealing piece is flat and free of warping and deformation, burrs are not arranged on the surface of a cutting seam, any sliding injury, indentation and cracks are not arranged on the surface of the fingertip sealing piece, and the processing quality of the surface of the fingertip sealing piece is greatly improved.
Description
Technical Field
The invention belongs to the field of special processing, and particularly relates to a processing method of a fingertip sealing sheet of an aero-engine.
Background
At present, the sealing of an aero-engine is one of the important engineering problems of the engine, the fingertip sealing is a novel device which can be used for sealing a main bearing cavity and an air flow path of the aero-engine, and the fingertip sealing is formed by staggering and arranging sealing pieces consisting of a plurality of cantilever fingertip beams. The fingertip wire grooves of the fingertip sealing pieces adopt forms of involute, logarithmic spiral and the like. The processing of the fingertip sealing sheet (figure 1) is extremely high in requirement, an involute or logarithmic spiral narrow groove of 0.3mm is processed on a 0.25mm thin sheet, the size and position precision of a groove are 0.03mm, a remelting layer is not formed after the processing, the roughness Ra is less than 0.8 mu m, the part is required to be flat and smooth, warping and deformation are not allowed, any sliding damage, indentation and crack are not allowed to exist on the surface of the part, burrs are not allowed to exist on the surface of a cut seam, and the processing difficulty is large.
Aiming at the technical problems, the processing methods such as wire cut electrical discharge machining, long pulse laser, mechanical processing and the like and the positioning devices thereof can not meet the processing technical requirements. In order to realize high-precision and high-quality machining of a special-shaped hole groove of a high-precision part of an aero-engine, a machining method of a fingertip sealing sheet of the aero-engine is urgently needed to be developed.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a processing method of a fingertip sealing sheet of an aero-engine, which can realize high-quality processing of the fingertip sealing sheet, so that the fingertip sealing sheet is flat and has no warpage or deformation, no burr is formed on the surface of a cutting seam, no sliding damage, indentation or crack is formed on the surface of the fingertip sealing sheet, and the processing quality of the surface of the fingertip sealing sheet is greatly improved.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a processing method of a fingertip sealing sheet of an aircraft engine comprises the following steps:
installing and positioning the fingertip sealing piece raw material to be processed by adopting an air source vacuum adsorption positioning mode;
adopt ultrafast laser galvanometer scanning mode according to predetermineeing the scanning processing orbit to combine the supplementary technology of vacuum environment to treat processing fingertip seal piece raw materials and carry out cutting process, predetermine the scanning processing orbit and include: firstly, cutting and processing a fingertip wire groove of the fingertip sealing piece according to a 9-segment line distribution deformation control processing mode, then cutting and processing an outer circle of the fingertip sealing piece, and finally cutting and processing an inner circle of the fingertip sealing piece.
Further, in the air source vacuum adsorption positioning mode, the air source pressure is 0.6MPa to 1.5 MPa; the vacuum pressure is-0.1 MPa-0 MPa.
Further, the processing parameters of the ultrafast laser galvanometer scanning mode include: the pulse width of the ultrafast laser is 50 fs-300 fs; the ultrafast laser pulse frequency is 50 kHz-200 kHz; the ultrafast laser power is 5W-20W.
Further, the processing parameters of the ultrafast laser galvanometer scanning mode further include: the defocusing amount is-1 mm to 1 mm; the incident angle is 45-90 degrees.
Further, the vacuum degree of the vacuum environment auxiliary process is 100 Pa.
Further, adopt air supply vacuum adsorption locate mode will wait to process fingertip sealing piece raw materials and install the location, specifically include:
the fingertip sealing piece raw material to be processed is installed and positioned through an air source adsorption device, the air source adsorption device comprises an air source, a handle switch, an adjusting valve, an electromagnetic valve, a vacuum generator and a tool sucker, an air source input port is arranged on the side surface of the tool sucker, a vacuum adsorption outer circular groove corresponding to the excircle of the fingertip sealing sheet and a vacuum adsorption inner circular groove corresponding to the inner circle of the fingertip sealing sheet are arranged on one end surface of the tool sucker, the vacuum adsorption outer circular ring groove and the vacuum adsorption inner circular ring groove are both communicated with the gas source input port, the gas source input port is connected with one end of the vacuum generator, the other end of the vacuum generator is connected with one end of the electromagnetic valve, the other end of the electromagnetic valve is connected with one end of the regulating valve, the other end of the regulating valve is connected with one end of the handle switch, and the other end of the handle switch is connected with the air source.
Further, the gas source adsorption device also comprises a silencer and a vacuum filter, wherein the silencer is connected with the vacuum generator; the vacuum filter is arranged between the vacuum generator and the tool sucker, one end of the vacuum filter is connected with one end of the vacuum generator, and the other end of the vacuum filter is connected with the air source input port.
Further, the air source adsorption device further comprises a vacuum meter, and the vacuum meter is installed on the tool sucker and used for measuring vacuum pressure.
Further, be located on a terminal surface of frock sucking disc the both sides of the outer annular groove of vacuum adsorption are provided with outer annular sealing strip, be located on a terminal surface of frock sucking disc the both sides of the inner annular groove of vacuum adsorption are provided with inner annular sealing strip.
Further, be provided with the mounting hole that is used for being connected with equipment workstation on the frock sucking disc, a terminal surface of frock sucking disc still coats and has the thermal barrier coating.
Compared with the prior art, the invention has at least the following beneficial effects: according to the processing method of the fingertip sealing piece of the aero-engine, provided by the invention, the raw material of the fingertip sealing piece to be processed is positioned in a gas source vacuum adsorption positioning mode, the surface of the fingertip sealing piece is not required to be clamped, the surface of the fingertip sealing piece is smooth, no sliding damage, no indentation and no crack are realized, and the surface quality of the fingertip sealing piece is greatly improved through high-quality nondestructive positioning. Through adopting ultrafast laser galvanometer scanning mode and according to preset scanning processing orbit, at first according to the fingertip line groove of 9 sections line distribution deformation control processing's mode cutting processing fingertip seal piece, then the excircle of cutting processing fingertip seal piece, the interior circle of cutting processing fingertip seal piece at last realizes that fingertip seal piece does not have warpage, no deformation, fingertip line groove (gradual-opening line groove, logarithmic spiral groove) do not have remelted layer, no burr, no crackle, the accurate minute high accuracy of laser, high quality processing of low roughness.
Further, in the air source vacuum adsorption positioning mode, the air source pressure is 0.6MPa to 1.5 MPa; the vacuum pressure is-0.1 MPa-0 MPa, and under the pressure, the required gas pressure supply device is simple and easy to obtain, the efficiency is improved, and the cost is saved.
Furthermore, the pulse width of the ultrafast laser is 50 fs-300 fs, and the requirement of processing quality is met. The ultrafast laser pulse frequency is 50 kHz-200 kHz, the enhancement effect of vacuum on the femtosecond laser self-focusing length depends on the laser repetition frequency, the threshold value of a femtosecond laser processing material is reduced in a high repetition frequency vacuum environment, and the processing efficiency is improved. The ultrafast laser power is 5W-20W, and the laser under the power is high in economy and meets the requirement of processing quality.
Further, the processing parameters of the ultrafast laser galvanometer scanning mode further include: the defocusing amount is-1 mm, the incident angle is 45-90 degrees, and the cutting forming taper of the laser beam and the part profile deformation during scanning can be effectively controlled.
Further, processing is carried out under the vacuum degree of 100Pa, a vacuum auxiliary processing technology is adopted, loss caused by ionization in laser transmission is weakened and light guiding is enhanced in a vacuum environment, and larger laser pulse energy can be adopted. Because the air pressure in the vacuum environment is extremely low, the laser ablation product is more efficiently vaporized and sprayed, and the efficiency is obviously improved. Meanwhile, under the vacuum environment, the machined surface has no phenomena of ablation discoloration, warping deformation and the like, the machining quality is improved, and efficient high-quality machining under the vacuum degree of 100Pa is realized.
Further, the fingertip sealing piece raw material to be processed is installed and positioned in a gas source vacuum adsorption positioning mode, during adsorption operation, a gas source is connected with a gas circuit, a handle switch is turned on, a pressure value is adjusted through a pressure adjusting valve, when a solenoid valve is powered on, compressed air (gas source) enters a vacuum generator, the vacuum generator inputs the compressed air from a gas source input port after working, so that vacuum is generated in a tool sucker cavity, the lowest vacuum degree is achieved, the excircle of the fingertip sealing piece is adsorbed by a vacuum adsorption outer circular ring groove, the inner circle of the fingertip sealing piece is adsorbed by a vacuum adsorption inner circular ring groove, and the fingertip sealing piece raw material to be processed is tightly attached to the tool sucker under the action of the difference of pressure inside and outside the tool sucker; when the operation is relaxed, when the electromagnetic valve is powered off, the compressed air (air source) is cut off, and under the condition that no compressed air (air source) is input, the tool sucker quickly releases the raw material of the fingertip sealing sheet to be processed.
Further, the air source adsorption device also comprises a silencer and a vacuum filter, and noise is eliminated through the silencer, so that noise pollution is avoided. The vacuum filter is used for filtering pollutants in the gas, so that the surface of the part is clean and flat.
Further, the air source adsorption device also comprises a vacuum meter, and the vacuum pressure value is determined through the vacuum meter, so that the air source adsorption device is convenient to accurately control.
Furthermore, the two sides of the vacuum adsorption outer circular groove on one end face of the tool sucker are provided with outer circular sealing strips, and the two sides of the vacuum adsorption inner circular groove on one end face of the tool sucker are provided with inner circular sealing strips, so that a better tight adsorption effect is ensured.
Further, the tool sucker is provided with a mounting hole used for being connected with the equipment workbench, so that the tool sucker is convenient to mount. A thermal barrier coating is further coated on one end face of the tool sucker, so that the tool sucker is not damaged due to heat accumulation in the machining process.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a raw material of a fingertip sealing sheet to be processed;
FIG. 2 is a schematic view of a fingertip sealing piece processing technique of the present invention;
FIG. 3 is a schematic view of the gas source adsorption unit of the present invention;
FIG. 4 is a top view of the tooling chuck of the present invention;
FIG. 5 is a front cross-sectional view of the tooling chuck of the present invention;
FIG. 6 is a side cross-sectional view of the tooling chuck of the present invention;
FIG. 7 is a schematic view of a fingertip sealing tab;
fig. 8 is a partially enlarged view of the fingertip sealing sheet.
In the figure: 1-gas source; 2-a handle switch; 3-adjusting the valve; 4-an electromagnetic valve; 5-a vacuum generator; 6-a silencer; 7-vacuum filter; 8-vacuum meter; 9-tool sucker; 901-an air source input port; 902-vacuum adsorption of the outer circular ring groove; 903-vacuum adsorbing the inner circular groove; 904-outer annular ring seal strip; 905-inner circular ring-shaped sealing strip; 906-mounting holes; 907-thermal barrier coating; 10-fingertip sealing piece raw material; 11-fingertip sealing disc.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. 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.
As a specific embodiment of the present invention, referring to fig. 1 to 6, a method for processing a fingertip seal sheet for an aircraft engine specifically includes the following steps:
and installing and positioning the fingertip sealing piece raw material 10 to be processed by adopting an air source vacuum adsorption positioning mode. Preferably, in the air source vacuum adsorption positioning mode, the air source pressure is 0.6MPa to 1.5 MPa; the vacuum pressure is-0.1 MPa-0 MPa. The fingertip sealing piece raw material to be processed is positioned in a gas source vacuum adsorption positioning mode, so that the fingertip sealing piece is smooth in surface, free of sliding damage, free of indentation and free of cracks, namely, the fingertip sealing piece is positioned in a high-quality and nondestructive mode, and the surface quality of the fingertip sealing piece is greatly improved.
Specifically, the fingertip sealing sheet raw material to be processed is installed and positioned through the multi-point air source adsorption device, and is fixed on the machine tool workbench through the multi-point air source adsorption device. As shown in fig. 3 to 6, the air source adsorption device includes an air source 1, a handle switch 2, a regulating valve 3, a solenoid valve 4, a vacuum generator 5 and a tool chuck 9, an air source input port 901 has been seted up to the side of the tool chuck 9, a vacuum adsorption outer circular ring groove 902 corresponding to the fingertip seal piece excircle and a vacuum adsorption inner circular ring groove 903 corresponding to the fingertip seal piece inner circle are seted up to a terminal surface of the tool chuck 9, preferably, both sides that lie in the vacuum adsorption outer circular ring groove 902 on a terminal surface of the tool chuck 9 are provided with an outer circular ring sealing strip 904, both sides that lie in the vacuum adsorption inner circular ring groove 903 on a terminal surface of the tool chuck 9 are provided with an inner circular ring sealing strip 905, and it is more reliable to ensure the vacuum adsorption effect through the sealing strips. The outer circular vacuum adsorption ring groove 902 and the inner circular vacuum adsorption ring groove 903 are communicated with a gas source input port 901, the gas source input port 901 is connected with one end of a vacuum generator 5, the other end of the vacuum generator 5 is connected with one end of a solenoid valve 4, the other end of the solenoid valve 4 is connected with one end of a regulating valve 3, the other end of the regulating valve 3 is connected with one end of a handle switch 2, and the other end of the handle switch 2 is connected with a gas source 1.
The working principle of the air source adsorption device is as follows: during adsorption operation, the air source 1 is connected with an air circuit, the handle switch 2 is opened, the pressure value is adjusted through the pressure regulating valve 3, when the electromagnetic valve 4 is electrified, compressed air (air source) enters the vacuum generator 5, the vacuum generator 5 is input from the air source input port 901 after working, vacuum is generated in the cavity of the tool chuck 9, the lowest vacuum degree is achieved, the outer circle of the fingertip sealing sheet is adsorbed by the vacuum adsorption outer circular ring groove 902, the inner circle of the fingertip sealing sheet is adsorbed by the vacuum adsorption inner circular ring groove 903, and namely, the fingertip sealing sheet raw material to be processed is tightly attached to the tool chuck under the action of the difference between the internal pressure and the external pressure of the tool chuck 9; when the operation is relaxed, when the electromagnetic valve 4 is powered off, the compressed air (air source) is cut off, and under the condition that no compressed air (air source) is input, the tool sucker 9 quickly releases the raw material of the fingertip sealing sheet to be processed.
For example, when solenoid valve 4 circular telegram, compressed air (air supply) gets into vacuum generator 5, and vacuum generator 5 works and makes frock sucking disc intracavity produce the vacuum to reach minimum vacuum, the frock sucking disc closely laminates the absorption and treats processing fingertip sealing piece raw materials under the effect of inside and outside pressure difference, at the in-process of ultrafast laser galvanometer scanning cutting, keeps closely adsorbed state, and cutting process accomplishes the back, solenoid valve 4 outage, stops the air feed in the frock sucking disc, and fingertip sealing piece breaks away from with the frock sucking disc rapidly.
In a preferred embodiment, the air source adsorption device further comprises a silencer 6 and a vacuum filter 7, wherein the silencer 6 is connected with the vacuum generator 5, and noise is eliminated through the silencer 6. The vacuum filter 7 is arranged between the vacuum generator 5 and the tool sucker 9, one end of the vacuum filter 7 is connected with one end of the vacuum generator 5, the other end of the vacuum filter 7 is connected with the air source input port 901, and pollutants in the air are filtered through the vacuum filter 7. Preferably, the air source adsorption device further comprises a vacuum gauge 8, the vacuum gauge 8 is installed on the tool sucker 9 and used for measuring vacuum pressure, and a vacuum pressure value is determined through the vacuum gauge 8.
In a more preferred embodiment, a mounting hole 906 for connecting to an equipment table is provided on the tool chuck 9, and a thermal barrier coating 907 is further coated on one end surface of the tool chuck 9.
That is to say, with reference to fig. 3 to 6, according to the structural features and the optimization process of the fingertip sealing piece, the tool chuck 9 with the vacuum adsorption outer circular ring groove 902 and the vacuum adsorption inner circular ring groove 903 is designed, because the fingertip sealing piece is an annular part and is a full circle piece before processing, and considering the deformation factor of the laser processing part, the vacuum adsorption outer circular ring groove 902 and the vacuum adsorption inner circular ring groove 903 are designed on the tool chuck, so that the fingertip sealing piece is guaranteed not to be warped and deformed in the process of processing the full circle piece into a circular piece, and a tight adsorption state is maintained, and the processing precision is guaranteed. The vacuum gas circuit channel of the tool sucker 9 is connected with an external vacuum generator through a gas source input port 901, air in the cavity of the tool sucker is pumped out under the action of the vacuum generator, the fingertip sealing sheet is adsorbed on the tool sucker under the action of the internal and external atmospheric pressure difference, and in order to ensure a tight adsorption state, two outer annular sealing strips 904 and two inner annular sealing strips 905 are respectively adopted for sealing the vacuum adsorption outer annular groove 902 and the vacuum adsorption inner annular groove 903. The gas source input port 901 is communicated with the vacuum adsorption outer circular groove 902 and the vacuum adsorption inner circular groove 903 to form an adsorption passage, and the tool sucker is connected and positioned with the equipment workbench through the mounting hole 906. According to the characteristics of the laser processing technology, the fingertip sealing sheet is considered to be closely adsorbed to the tool sucker when being adsorbed to the tool sucker, in order to prevent the tool sucker from deforming or being damaged due to heat accumulation generated in the processing process, a thermal barrier coating 907 is coated on the surface of the tool sucker, and the tool sucker is prevented from being damaged due to heat accumulation in the processing process.
Adopt ultrafast laser galvanometer scanning mode according to predetermineeing the scanning processing orbit to combine vacuum environment auxiliary technology to treat processing fingertip seal piece raw materials and process, predetermine the scanning processing orbit and include: firstly, processing a fingertip wire groove of the fingertip sealing piece according to a 9-segment line distribution deformation control processing mode, then processing an outer circle of the fingertip sealing piece, and finally processing an inner circle of the fingertip sealing piece. The processing parameters of the ultrafast laser galvanometer scanning mode comprise: the pulse width of the ultrafast laser is 50 fs-300 fs; the ultrafast laser pulse frequency is 50 kHz-200 kHz; the ultrafast laser power is 5W-20W; the defocusing amount is-1 mm to 1 mm; the incident angle is 45-90 degrees; the vacuum environment assists the process, and the vacuum degree is 100 Pa. By adopting an ultrafast laser galvanometer scanning mode and scanning processing tracks and combining a vacuum environment auxiliary process, ultrafast laser galvanometer scanning processing of the fingertip sealing sheet of the aero-engine is formed, and laser precise, fine, high-precision and high-quality processing of the fingertip sealing sheet without warping and deformation, a fingertip wire groove (a gradual opening wire groove and a logarithmic spiral groove) without a remelted layer, burrs and cracks and low roughness is realized.
As shown in fig. 1 and 2, according to the structural characteristics of the fingertip sealing piece, in order to prevent the cutting deformation of the thin-wall fingertip sealing piece, a 9-segment line distribution deformation control processing mode is adopted for processing.
Specifically, the 9-segment line distribution deformation control processing mode is as follows: the total of 36 fingertip wire grooves are formed in the fingertip sealing sheet, the fingertip sealing sheet is divided into 4 areas, namely I, II, III and IV, each area comprises 9 fingertip wire grooves, the fingertip wire grooves are processed according to the 4 areas, namely the 9 fingertip wire grooves in the 4 areas, the total of 9 sets of processing programs are used for processing the 36 fingertip wire grooves, and the 9 sets of processing programs are specifically as follows:
group 1: i-a, III-a, II-a, IV-a;
group 2: i-b, III-b, II-b, IV-b;
group 3: i-c, III-c, II-c, IV-c;
group 4: i-d, III-d, II-d, IV-d;
group 5: i-e, III-e, II-e, IV-e;
group 6: i-f, III-f, II-f, IV-f;
group 7: i-g, III-g, II-g and IV-g;
group 8: i-h, III-h, II-h and IV-h;
group 9: a-i, III-i, II-i, IV-i.
Note: and (3) processing according to the drawn fingertip wire groove graph by scanning of the ultrafast laser galvanometer, and automatically identifying a processing track.
Examples
Taking a certain type of fingertip sealing piece (fig. 7 and 8) as an example: the processing of the fingertip sealing piece is extremely high in requirement, 36 involute narrow grooves (fingertip wire grooves) of 0.3mm are processed on a 0.25mm thin sheet, the size and position precision of the fingertip wire grooves are 0.03mm, no remelting layer exists after the processing, the roughness Ra is less than 0.8 mu m, the high-temperature alloy material is made of the fingertip sealing piece, the fingertip sealing piece is flat in requirement, warping and deformation are not allowed, any sliding injury, indentation and crack are not allowed on the surface of the fingertip sealing piece, and burrs are not allowed to exist on the surface of a cutting seam.
The method comprises the following steps:
(1) installing and positioning the raw materials of the fingertip sealing sheet to be processed: mounting and positioning a fingertip sealing sheet raw material on ultrafast laser processing equipment by using a high-precision nondestructive multipoint gas source adsorption device for a fingertip sealing sheet of an aero-engine (figure 1);
specifically, determining a tool chuck pressure parameter: 1) air source pressure: 0.8 MPa; 2) vacuum pressure: -0.06 MPa.
The tool sucker is installed on an equipment workbench, the air source pressure value and the vacuum pressure value are adjusted within the working range, and after the vacuum pressure of the tool sucker is stable, the fingertip sealing sheet raw material is installed and aligned.
(2) Determining the scanning processing parameters of the ultrafast laser galvanometer: and determining reasonable laser processing parameters according to the processing characteristics (metal and nonmetal types, thickness and surface quality) of the material.
The processing parameters of the ultrafast laser galvanometer scanning mode comprise: 1) determining the pulse width of the ultrafast laser: 200 fs; 2) determining the ultrafast laser pulse frequency: 80 kHz; 3) determining the laser power: 5W; 4) defocus amount: +1 mm; 5) incident angle θ: 90 degrees; 6) setting a scanning track: drawing a fingertip line slot graph of the fingertip sealing sheet, and automatically identifying a scanning track; 7) the vacuum environment assists the process, and the vacuum degree is 100 MPa.
(3) And (3) scanning and processing a fingertip wire slot by an ultrafast laser galvanometer: and (3) positioning and processing the fingertip wire slot by utilizing ultrafast laser processing equipment (ultrafast laser galvanometer scanning mode).
According to the structural characteristics of the fingertip sealing piece, in order to prevent the cutting deformation of the thin-wall part, the processing distribution mode of 9-section line distribution deformation control processing is adopted for processing.
The 9-segment line distribution deformation control processing mode is as follows: the total of 36 fingertip wire grooves are formed in the fingertip sealing sheet, the fingertip sealing sheet is divided into 4 areas, namely I, II, III and IV, each area comprises 9 fingertip wire grooves, the fingertip wire grooves are processed according to the 4 areas, namely the 9 fingertip wire grooves in the 4 areas, the total of 9 sets of processing programs are used for processing the 36 fingertip wire grooves, and the 9 sets of processing programs are specifically as follows:
group 1: i-a, III-a, II-a, IV-a;
group 2: i-b, III-b, II-b, IV-b;
group 3: i-c, III-c, II-c, IV-c;
group 4: i-d, III-d, II-d, IV-d;
group 5: i-e, III-e, II-e, IV-e;
group 6: i-f, III-f, II-f, IV-f;
group 7: i-g, III-g, II-g and IV-g;
group 8: i-h, III-h, II-h and IV-h;
group 9: a-i, III-i, II-i, IV-i.
(4) And (3) scanning and processing the excircle and the inner circle of the fingertip sealing sheet by using an ultrafast laser galvanometer: and (3) positioning and processing the excircle and the inner circle of the fingertip sealing sheet by using ultrafast laser processing equipment (ultrafast laser galvanometer scanning mode).
According to the structural characteristics of the fingertip sealing piece, in order to prevent the thin-wall part from being cut and deformed, after 36 fingertip wire grooves are processed, the outer circle and the inner circle of the fingertip sealing piece are sequentially processed.
Note: processing fingertip seal piece excircle and interior circle in proper order, fingertip seal piece raw materials, will be cut apart into a circle and an excircle diameter 100mm of interior circle diameter 77mm, circle diameter 77 mm's ring, closely adsorb with the frock sucking disc in order to ensure fingertip seal piece, prevent fingertip seal piece deformation, in fingertip seal piece, the whole cutting of excircle is accomplished the back, the solenoid valve outage, compressed air (air supply) cuts off, in the condition that does not have compressed air (air supply) input, stop the air feed in the frock sucking disc, the part breaks away from with the frock sucking disc, fingertip seal piece (ring) and unnecessary tablet (disk) are taken off again.
(4) Cleaning the surfaces of the fingertip sealing pieces: and blowing off pollutants on the surface of the fingertip sealing sheet by using a compressed air gun.
(5) Inspecting a fingertip sealing sheet: and (5) checking the processing quality of the fingertip wire grooves.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A processing method of a fingertip sealing sheet of an aircraft engine is characterized by comprising the following steps:
installing and positioning the fingertip sealing piece raw material to be processed by adopting an air source vacuum adsorption positioning mode;
adopt ultrafast laser galvanometer scanning mode according to predetermineeing the scanning processing orbit to combine the supplementary technology of vacuum environment to treat processing fingertip seal piece raw materials and carry out cutting process, predetermine the scanning processing orbit and include: firstly, cutting and processing a fingertip wire groove of the fingertip sealing piece according to a 9-segment line distribution deformation control processing mode, then cutting and processing an outer circle of the fingertip sealing piece, and finally cutting and processing an inner circle of the fingertip sealing piece.
2. The processing method of the fingertip sealing sheet of the aero-engine according to claim 1, wherein in the air source vacuum adsorption positioning mode, the air source pressure is 0.6MPa to 1.5 MPa; the vacuum pressure is-0.1 MPa-0 MPa.
3. The processing method of the fingertip sealing sheet of the aircraft engine according to claim 1, wherein the processing parameters of the ultrafast laser galvanometer scanning mode include: the pulse width of the ultrafast laser is 50 fs-300 fs; the ultrafast laser pulse frequency is 50 kHz-200 kHz; the ultrafast laser power is 5W-20W.
4. The processing method of the fingertip sealing sheet of the aircraft engine according to claim 3, wherein the processing parameters of the ultrafast laser galvanometer scanning mode further include: the defocusing amount is-1 mm to 1 mm; the incident angle is 45-90 degrees.
5. The processing method of the aircraft engine fingertip sealing sheet according to the claim 3, wherein the vacuum degree of the vacuum environment auxiliary process is 100 Pa.
6. The processing method of the aircraft engine fingertip sealing sheet according to claim 1, wherein the fingertip sealing sheet to be processed is installed and positioned by adopting an air source vacuum adsorption positioning mode, and specifically comprises:
treat processing fingertip seal piece raw materials through air supply adsorption equipment and install the location, air supply adsorption equipment includes air supply (1), handle switch (2), governing valve (3), solenoid valve (4), vacuum generator (5) and frock sucking disc (9), air supply input port (901) have been seted up to the side of frock sucking disc (9), the terminal surface of frock sucking disc (9) is seted up with outer annular groove of vacuum adsorption (902) that fingertip seal piece excircle corresponds and with the inner annular groove of vacuum adsorption (903) that the fingertip seal piece is interior, outer annular groove of vacuum adsorption (902) with inner annular groove of vacuum adsorption (903) all with air supply input port (901) intercommunication, air supply input port (901) with the one end of vacuum generator (5) is connected, the other end of vacuum generator (5) with the one end of solenoid valve (4) is connected, the other end of the electromagnetic valve (4) is connected with one end of the regulating valve (3), the other end of the regulating valve (3) is connected with one end of the handle switch (2), and the other end of the handle switch (2) is connected with the air source (1).
7. The processing method for the fingertip sealing sheet of the aircraft engine is characterized in that the air source adsorption device further comprises a silencer (6) and a vacuum filter (7), wherein the silencer (6) is connected with the vacuum generator (5); the vacuum filter (7) is arranged between the vacuum generator (5) and the tool sucker (9), one end of the vacuum filter (7) is connected with one end of the vacuum generator (5), and the other end of the vacuum filter (7) is connected with the air source input port (901).
8. The machining method for the fingertip sealing sheet of the aircraft engine is characterized in that the air source adsorption device further comprises a vacuum gauge (8), and the vacuum gauge (8) is installed on the tool sucker (9) and used for measuring the vacuum pressure.
9. The machining method of the aircraft engine fingertip sealing sheet according to the claim 6, characterized in that outer circular ring sealing strips (904) are arranged on two sides of the vacuum adsorption outer circular ring groove (902) on one end face of the tool sucker (9), and inner circular ring sealing strips (905) are arranged on two sides of the vacuum adsorption inner circular ring groove (903) on one end face of the tool sucker (9).
10. The machining method for the fingertip sealing sheet of the aero-engine according to claim 6, characterized in that a mounting hole (906) for connecting with an equipment workbench is formed in the tool sucker (9), and a thermal barrier coating (907) is further coated on one end face of the tool sucker (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111535212.6A CN113977109B (en) | 2021-12-15 | 2021-12-15 | Processing method of aeroengine fingertip sealing plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111535212.6A CN113977109B (en) | 2021-12-15 | 2021-12-15 | Processing method of aeroengine fingertip sealing plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113977109A true CN113977109A (en) | 2022-01-28 |
| CN113977109B CN113977109B (en) | 2023-11-03 |
Family
ID=79733938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111535212.6A Active CN113977109B (en) | 2021-12-15 | 2021-12-15 | Processing method of aeroengine fingertip sealing plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113977109B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105538033A (en) * | 2016-02-14 | 2016-05-04 | 北京航空航天大学 | Machining method of fiber reinforced type high-temperature composite used for aircraft engines |
| US20170074405A1 (en) * | 2015-09-15 | 2017-03-16 | Rolls-Royce Deutschland Ltd & Co Kg | Sealing element, sealing system with a sealing element, turbomachine with a sealing system and method for manufacturing a sealing element |
| CN109366022A (en) * | 2018-11-22 | 2019-02-22 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of finger tip obturages piece picosecond ultrafast laser cut quality control method |
| CN109622542A (en) * | 2018-12-06 | 2019-04-16 | 中国航发贵州黎阳航空动力有限公司 | Fanjet bearing case bearing insert processes protective device and method |
| CN110977322A (en) * | 2019-11-21 | 2020-04-10 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for repairing defect of typical part of tail nozzle mechanical adjusting system |
| CN111531325A (en) * | 2019-11-25 | 2020-08-14 | 成都承奥科技有限公司 | Processing method for distinguishing finger tip piece |
| CN112658446A (en) * | 2020-12-10 | 2021-04-16 | 中国科学院宁波材料技术与工程研究所 | Laser-induced plasma micro-machining device and method |
| CN113478068A (en) * | 2021-06-16 | 2021-10-08 | 西安理工大学 | Real-time detection method for thermal deformation of laser processing thin-wall part |
-
2021
- 2021-12-15 CN CN202111535212.6A patent/CN113977109B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170074405A1 (en) * | 2015-09-15 | 2017-03-16 | Rolls-Royce Deutschland Ltd & Co Kg | Sealing element, sealing system with a sealing element, turbomachine with a sealing system and method for manufacturing a sealing element |
| CN105538033A (en) * | 2016-02-14 | 2016-05-04 | 北京航空航天大学 | Machining method of fiber reinforced type high-temperature composite used for aircraft engines |
| CN109366022A (en) * | 2018-11-22 | 2019-02-22 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of finger tip obturages piece picosecond ultrafast laser cut quality control method |
| CN109622542A (en) * | 2018-12-06 | 2019-04-16 | 中国航发贵州黎阳航空动力有限公司 | Fanjet bearing case bearing insert processes protective device and method |
| CN110977322A (en) * | 2019-11-21 | 2020-04-10 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for repairing defect of typical part of tail nozzle mechanical adjusting system |
| CN111531325A (en) * | 2019-11-25 | 2020-08-14 | 成都承奥科技有限公司 | Processing method for distinguishing finger tip piece |
| CN112658446A (en) * | 2020-12-10 | 2021-04-16 | 中国科学院宁波材料技术与工程研究所 | Laser-induced plasma micro-machining device and method |
| CN113478068A (en) * | 2021-06-16 | 2021-10-08 | 西安理工大学 | Real-time detection method for thermal deformation of laser processing thin-wall part |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113977109B (en) | 2023-11-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113492270B (en) | Device and method for processing nozzle tangential hole by femtosecond laser | |
| CN104842077B (en) | Aluminum alloy microwave assembly brazing sheet processing method | |
| CN110935968A (en) | Integral electrolytic machining method and electrolytic tool for blisk | |
| CN213196184U (en) | Double-light-source composite laser processing device | |
| CN112548344A (en) | Efficient clean thinning method applied to silicon carbide ceramic | |
| CN104907650A (en) | Abrasive water jet-electrolysis composite pass making method and device for metal part with thermal barrier coating | |
| CN112643100A (en) | Shimming laser auxiliary milling device and method suitable for difficult-to-machine materials | |
| CN109483060A (en) | Air film hole ultrafast laser processing unit (plant) and method under water jet environment | |
| CN114571086B (en) | Nanosecond laser-induced plasma composite femtosecond laser processing device and processing method | |
| CN110899981A (en) | Laser-modified ultra-precision cutting laser-assisted hard and brittle material processing method | |
| CN113977109A (en) | Machining method for finger tip sealing piece of aero-engine | |
| CN109877470A (en) | A kind of preparation method of lithium ion battery porous copper foil | |
| CN114131208A (en) | Device and method for profiling by laser-induced plasma | |
| CN111702335B (en) | Process method for welding 304 stainless steel plate | |
| CN201154415Y (en) | Ultraviolet laser machining system of diaphragm for scanning electron microscope | |
| CN106891095A (en) | A kind of numerical control laser cutter | |
| CN111531325B (en) | Method for processing split finger tip sheet | |
| CN208696566U (en) | A kind of varifocal laser cutting device | |
| CN107984101B (en) | A kind of processing method of adjustment sheet class ceramic matric composite cutting | |
| CN112756818B (en) | High-precision high-efficiency ultrafast laser processing method for micropores with large depth-diameter ratio | |
| CN211588966U (en) | Laser cutting fixture for metal thin film | |
| CN114473221A (en) | Ultrasonic vibration assisted laser induction plasma processing device and method | |
| CA2487913A1 (en) | Method of producing a composite component | |
| CN206747799U (en) | A kind of device of fiber pulse induced with laser cutting carbon fibre composite | |
| CN206382714U (en) | A kind of laser cutting machine of image automatic tracing-edge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |