CN117124025A - Annular thin-wall part of combustion chamber and processing method thereof - Google Patents
Annular thin-wall part of combustion chamber and processing method thereof Download PDFInfo
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- CN117124025A CN117124025A CN202311169401.5A CN202311169401A CN117124025A CN 117124025 A CN117124025 A CN 117124025A CN 202311169401 A CN202311169401 A CN 202311169401A CN 117124025 A CN117124025 A CN 117124025A
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- contour surface
- tool
- machining
- combustion chamber
- target part
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 24
- 238000003672 processing method Methods 0.000 title claims description 6
- 238000003754 machining Methods 0.000 claims abstract description 46
- 239000000463 material Substances 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 33
- 238000005520 cutting process Methods 0.000 claims abstract description 14
- 238000007514 turning Methods 0.000 claims abstract description 11
- 230000000149 penetrating effect Effects 0.000 claims abstract description 8
- 238000005498 polishing Methods 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims description 17
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000009987 spinning Methods 0.000 description 6
- 230000003746 surface roughness Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000002035 prolonged effect 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
Abstract
The application belongs to the technical field of machining, and particularly relates to a combustion chamber annular thin-wall part and a machining method thereof, wherein the method comprises the following steps: forming a wire penetrating hole for a cutting wire to pass through on a cylindrical bar, wherein the axis of the wire penetrating hole is parallel to the axis of the bar; cutting the cylindrical bar into a tube material by using a cutting line, wherein a machining allowance is formed between the inner wall of the tube material and the contour line of the target part so as to form an edge part for clamping a chuck of a machine tool; clamping the edge part of the pipe material by using a machine tool chuck, and turning the outer contour surface of the target part from the outer diameter to the inner diameter of the pipe material; installing a circular tool in the middle of the outer contour surface, clamping the tool by using a machine tool chuck, and turning the inner contour surface of the target part; and removing the tool, and polishing the tool mounting part of the pipe to form the target part. By the method, the target part body is manufactured only by machining, the working procedure is simple, the parts are free from plastic deformation, and the part yield can be improved.
Description
Technical Field
The application belongs to the technical field of machining, and particularly relates to a combustion chamber annular thin-wall part and a machining method thereof.
Background
At present, with the increasing demands of various aircrafts, propellers, fuel tanks and the like on maneuverability, loading capacity and maximum capacity, the structure of the aircraft has also put forward higher demands on light weight and high strength.
In the traditional processing technology of arc-shaped thin walls of combustion chambers, a spinning technology is mostly adopted for manufacturing, but the technology needs to manufacture a die in advance, and has the advantages of higher cost, complex technology and long period; the process is suitable for processing batch products, and cannot be suitable for processing single products; in the spinning process, the plastic deformation in the spinning process can reduce the mechanical property of the part and influence the service life of the part;
for the processing of arc-shaped thin walls of the combustion chamber, the parts are large in size, thin in wall thickness and poor in rigidity, the phenomenon of vibration of a cutter easily occurs during machining, the precision and the surface roughness cannot be ensured, and the yield is low; meanwhile, the machining surface of the part is an arc-shaped surface, and clamping is difficult.
Disclosure of Invention
The application aims to solve at least one problem in the background art and provides a combustion chamber annular thin-wall part and a processing method thereof.
In order to achieve the above object, the present application provides a method for processing a thin-walled annular member for a combustion chamber, comprising:
forming a wire penetrating hole for a cutting wire to pass through on a cylindrical bar, wherein the axis of the wire penetrating hole is parallel to the axis of the bar;
cutting the cylindrical bar into a tube material by utilizing the cutting line, wherein a machining allowance is formed between the inner wall of the tube material and the contour line of the target part so as to form an edge part for clamping a chuck of a machine tool;
clamping the edge part of the pipe material by using a machine tool chuck, and turning the outer contour surface of the target part from the outer diameter to the inner diameter of the pipe material;
installing a circular tool in the middle of the outer contour surface, and then turning the inner contour surface of the target part;
and removing the tool, and polishing the tool mounting part on the pipe material to form a target part.
Preferably, the mounting the annular tooling in the middle of the outer contour surface includes:
welding the tool and the outer contour surface together;
and clamping the edge part of the pipe material, and carrying out machining on the tool to enable the tool to be coaxial with the pipe material.
Preferably, the tool and the outer contour surface are welded together by means of argon arc welding and spot welding.
Preferably, the welding points of the tool and the outer contour surface are at least 4 uniformly arranged welding points.
Preferably, the outer contour surface and the inner contour surface are arc-shaped surfaces.
Preferably, when the outer contour surface and the inner contour surface of the target part are machined, the pipe is firstly roughly machined, and then the pipe is finely machined.
Preferably, the inner contour surface of the target part is machined from the outer diameter to the inner diameter of the tube stock.
Preferably, the convex surface of the target part is an outer contour surface.
Preferably, the concave surface of the target part is an inner contour surface.
In order to achieve the above object, the present application provides a combustion chamber annular thin-walled member obtained using a method for processing a combustion chamber annular thin-walled member as described in any of the above.
Based on the above, the application has the beneficial effects that:
1. by the scheme of the application, the part is manufactured by only adopting one machining process, the working procedure is simple, and the machining period is obviously shortened; meanwhile, the die is not needed, so that the processing cost can be reduced, plastic deformation is avoided, the mechanical properties of the parts are not influenced, and the service life of the parts is prolonged;
2. according to the scheme provided by the application, when the outer contour surface of the part is machined, blank allowance exists in the inner contour, the whole rigidity of the part is high, and then the occurrence of vibration cutters is reduced.
3. According to the technical scheme, the tool is installed by adopting argon arc welding spot welding, the whole tool is simple and reliable, and meanwhile, the size of the tool can be adjusted according to the size or radian of a target part, and a redesign process flow is not needed.
Drawings
FIG. 1 schematically illustrates a flow chart of a method of machining a combustor annular thin-walled member in accordance with an embodiment of the present application;
FIGS. 2-7 schematically illustrate a target part machining disassembly schematic of one embodiment of the present application;
FIG. 8 schematically illustrates a schematic structural view of a target part according to one embodiment of the present application;
description of the drawings: bar 10, threading hole 101, target part contour 102, tubing 20, outer contour 201, inner contour 202, tooling 30.
Detailed Description
The present disclosure will now be discussed with reference to exemplary embodiments. It should be understood that the embodiments discussed are merely to enable those of ordinary skill in the art to better understand and thus practice the teachings of the present application and do not imply any limitation on the scope of the application.
As used herein, the term "comprising" and variants thereof are to be interpreted as meaning "including but not limited to" open-ended terms. The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment.
Fig. 1 schematically illustrates a flowchart of a method for processing a thin annular wall member of a combustion chamber according to an embodiment of the present application, and fig. 2 to 7 schematically illustrate a schematic diagram for processing and disassembling a target part according to an embodiment of the present application, as shown in fig. 1 to 7, a method for processing a thin annular wall member of a combustion chamber according to the present application includes:
s01: forming a wire penetrating hole 101 for a cutting wire to penetrate through on a cylindrical bar 10, wherein the axis of the wire penetrating hole 101 is parallel to the axis of the bar 10;
s02: cutting the cylindrical bar 10 into a tube 20 by using a cutting line, wherein a machining allowance is formed between the inner wall of the tube 20 and a target part contour line 102 so as to form an edge part for clamping a chuck of a machine tool;
s03: clamping the edge part of the pipe material 20 by using a machine tool chuck, and turning an outer contour surface 201 of the target part from the outer diameter to the inner diameter of the pipe material 20;
s04: installing the annular tool 30 in the middle of the outer contour surface 201, and turning the inner contour surface 202 of the target part;
s05: and removing the tool 30, and polishing the mounting part of the tool 30 on the pipe 20 to form the target part.
In the traditional technology, a spinning process is generally used for processing the arc-shaped wall of the combustion chamber, but under the process, a die is required to be manufactured in advance, so that the manufacturing cost of the process is increased, the period is long, meanwhile, the process is suitable for processing batch products, and if only a single product is required to be processed, the investment cost is high, and the period is long; when the part is spun, the part is subjected to plastic deformation, so that the mechanical property of the part is reduced, and the service life of the part is influenced;
according to the method disclosed by the application, only one mode of machining is adopted for the target part body, so that plastic deformation does not exist in the part re-machining process, the mechanical properties of products are not affected, meanwhile, a die is not required to be manufactured in advance, the cost is saved, the whole flow process is simple, and the machining period can be obviously shortened.
Further, for the processing of the annular thin wall of the combustion chamber, the part is large in size, thin in wall thickness and poor in rigidity, and a vibrating knife is easy to generate during processing, so that the precision and the surface roughness of the processed part cannot be ensured, the yield of the part is lower, and meanwhile, the processing surface of the part is an arc surface, and clamping is difficult;
in the application, when the outer contour surface 201 of the part is machined, the inner contour surface 202 is not machined, and has blank allowance, so that the part has larger rigidity, and when the inner contour surface 202 of the part is machined, the outer contour surface 201 of the part is clamped through the tool 30, so that the part is uniformly stressed in the machining process, the generation of vibration cutters can be effectively reduced, and the yield of the part is improved.
Further, fig. 2 to 7 are exploded cross-sectional views of the component of the present application at the time of processing, as shown in fig. 2 and 3, in steps S01 and S02:
the bar 10 is cylindrical, and fig. 2-7 are cross-sectional views of the bar 10 along the cylindrical axis, and a target part contour 102 is provided on the cross-sectional surface of the bar 10, where the target part contour 102 is a hypothetical contour for ease of understanding and description.
A wire-passing hole 101 is formed in the bar 10 in parallel with the axis of the bar 10, and the bar 10 may be cut along the wire-passing hole 101 by a wire-cutting process such that a central region of the bar 10 forms a cylindrical through-hole, so that the bar 10 becomes the tube 20.
Meanwhile, when the threading hole 101 is formed, a certain distance is required to be reserved between the threading hole and the target part contour line 102, so that machining allowance is reserved between the inner wall of the pipe 20 and the target part contour line 102, and the machine chuck can clamp the pipe conveniently during subsequent operation.
Further, as shown in fig. 4, in step S03:
the lathe chuck stretches into the annular center through hole of pipe material 20, carries out the clamping to the inner wall of pipe material 20, realizes fixing to pipe material 20, through programming the size and the shape isoparameter of the circular arc that the processing target part required on the numerical control lathe, put into the numerical control lathe with pipe material 20 for the numerical control lathe can cut pipe material 20 voluntarily, accomplishes the processing to the outline face 201 of pipe material 20.
When the numerical control lathe is used for machining, as a part of the edge part of the inner wall of the pipe material 20 is clamped by the machine tool chuck, when the outer contour surface 201 is machined, the clamping part is required to be avoided for machining, so that the pipe material 20 can be clamped by the machine tool chuck all the time in the machining process, meanwhile, the reserved residual material at the clamping part can also be used for clamping the pipe material 20 continuously and conveniently in the follow-up operation, the direct clamping with the target part is avoided, and the extrusion damage to the target part is avoided.
Meanwhile, when the outer contour surface 201 is machined, the machining sequence of the numerical control lathe needs to be machined from the outer diameter to the inner diameter of the pipe material 20, so that the machining precision of the outer contour surface 201 can be improved;
in addition, when the outer contour surface 201 is machined, the principle of rough turning and then finish turning is also complied with, most of blank allowance is cut off firstly, and then the outer contour surface 201 is finely cut off, so that the required precision and surface quality of the outer contour surface 201 are ensured.
Further, as shown in fig. 5, in step S04:
the annular tool 30 is mounted in the middle of the outer contour surface 201 and is coaxial with the pipe 20, and during mounting, the clamping part reserved on the inner wall of the pipe 20 is required to be clamped through a machine tool chuck, the pipe 20 is fixed, and then the tool 30 is mounted with the outer contour surface 201.
Meanwhile, the combination of the annular tool 30 and the annular pipe 20 improves the rigidity of the pipe 20, so that the inner profile 202 can be processed more stably, and the vibration of the cutter is reduced.
Further, the step of mounting the tool 30 to the outer profile 201 of the tubing 20 comprises:
s401: welding the tool 30 and the outer contour surface 201 together;
s402: clamping the edge of the pipe material 20, and turning the tool 30 to enable the tool 30 to be coaxial with the pipe material 20.
For the outer profile surface 201 of the tube 20, the arc surface is not beneficial to clamping, and the clamping problem needs to be solved through design work.
In step S401, the tool 30 and the outer contour surface 201 are welded together by means of argon arc welding spot welding, and at the same time, the welding points of the tool 30 and the outer contour surface 201 are at least 4 welding points which are uniformly arranged, so that the tool 30 and the outer contour surface 201 are firmly installed and are not easy to fall off, and smooth processing is ensured.
In step S402, after the fixture 30 and the outer contour surface 201 are mounted, the coaxiality of the fixture 30 and the outer contour surface 201 is not high, and when the subsequent machining of the inner contour surface 202 is performed, the machine tool chuck needs to be clamped at the inner circle of the fixture 30, if the coaxiality of the fixture 30 and the tube 20 is not high, the machining position of the inner contour surface 202 is offset, so that the thickness between the outer contour surface 201 and the inner contour surface 202 is different, or the target part cannot be formed, and the yield of the target part is affected.
As shown in fig. 6, when the inner contour surface 202 is machined, the radian and the dimensional parameters required for machining the inner contour surface 202 are programmed in the numerical control lathe in advance, and the tool 30 is clamped, so that the pipe 20 is put into the numerical control lathe, and the numerical control lathe automatically machines, thereby completing the machining of the inner contour surface 202.
Meanwhile, the machining sequence of the inner profile surface 202 is also that the pipe material 20 is machined from the outer diameter to the inner diameter, and during machining, the residual materials at the clamping position of the inner wall of the pipe material 20 reserved in the previous steps are also cut off together.
Further, as shown in fig. 7, in step S05:
cutting the tool 30 from the outer contour surface 201 of the pipe 20, polishing the spot-welded position of the pipe 20 to finally obtain the target part, and finishing the manufacturing.
The method is suitable for manufacturing thin-wall parts with small thickness and arc surfaces, and is widely applicable.
Further, fig. 8 schematically illustrates a structural diagram of a target part according to an embodiment of the present application, and as shown in fig. 8, the present application further provides a combustor annular thin-walled member obtained by using the above-described processing method of a combustor annular thin-walled member:
the outer contour surface 201 and the inner contour surface 202 of the target part are arc-shaped, the convex surface of the target part is the outer contour surface 201, and the concave surface of the target part is the inner contour surface 202.
In summary, through the steps, the target part body only adopts a machining mode to manufacture the thin wall of the combustion chamber, a prefabricated die is not needed, the production cost is low, the period is short, the method is applicable to processing of single products, and the problems that the die is required to be manufactured in advance and only applicable to processing of batch products when the spinning technology is adopted in the traditional technology are effectively avoided, and the investment cost is high and the period is long.
Meanwhile, the application does not use spinning technology, can avoid plastic deformation of parts, does not influence the mechanical properties of products, and prolongs the service life of the products.
During machining, the outer contour surface 201 of the pipe material 20 is machined firstly, at this time, the inner contour surface 202 of the pipe material 20 is not machined, and machining allowance is still reserved, so that the rigidity of the whole pipe material 20 is high, and further the generation of vibration cutters can be reduced during machining of the pipe material 20; and when the inner contour surface 202 of the pipe material 20 is machined, the coaxial tool 30 is welded on the outer contour surface 201 of the pipe material 20, so that the stress of the part is as uniform as possible in the machining process, the machining is stable, the vibration of a cutter can be reduced, the vibration of the cutter can be reduced in the whole machining process, the precision and the surface roughness of the part are ensured, and the yield of the part can be effectively improved.
The processing method is suitable for manufacturing thin-wall parts with small thickness and arc surfaces, and when target parts with different arcs or sizes are met, the size of the tooling 30 can be increased or reduced according to the needs, and a process flow method does not need to be redesigned.
The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.
It should be understood that, the sequence numbers of the steps in the summary and the embodiments of the present application do not necessarily mean the order of execution, and the execution order of the processes should be determined by the functions and the internal logic, and should not be construed as limiting the implementation process of the embodiments of the present application.
Claims (10)
1. The processing method of the annular thin-wall part of the combustion chamber is characterized by comprising the following steps of:
forming a wire penetrating hole for a cutting wire to pass through on a cylindrical bar, wherein the axis of the wire penetrating hole is parallel to the axis of the cylindrical bar;
cutting the cylindrical bar into a tube material by utilizing the cutting line, wherein a machining allowance is formed between the inner wall of the tube material and the contour line of the target part so as to form an edge part for clamping a chuck of a machine tool;
clamping the edge part of the pipe material by using a machine tool chuck, and turning the outer contour surface of the target part from the outer diameter to the inner diameter of the pipe material;
installing a circular tool in the middle of the outer contour surface, and then turning the inner contour surface of the target part;
and removing the tool, and polishing the tool mounting part on the pipe material to form a target part.
2. The method for machining the annular thin-walled workpiece of the combustion chamber according to claim 1, wherein the step of installing the annular tooling in the middle of the outer contour surface comprises the steps of:
welding the tool and the outer contour surface together;
and clamping the edge part of the pipe material, and carrying out machining on the tool to enable the tool to be coaxial with the pipe material.
3. The method for machining the annular thin-walled workpiece with the combustion chamber according to claim 2, wherein the tool and the outer contour surface are welded together by means of argon arc welding spot welding.
4. The method for machining the annular thin-walled workpiece of the combustion chamber according to claim 3, wherein the welding points of the tool and the outer contour surface are at least 4 welding points which are uniformly arranged.
5. The method of claim 1, wherein the outer contour surface and the inner contour surface are arcuate surfaces.
6. The method for machining a thin-walled annular part for a combustion chamber according to claim 1, wherein the pipe is rough machined and then finished when the outer and inner contour surfaces of the target part are machined.
7. The method for machining a thin-walled annular member for a combustion chamber according to claim 1, wherein an inner contour surface of the target part is machined from an outer diameter to an inner diameter of the tube.
8. The method for machining a thin-walled annular part for a combustion chamber according to claim 5, wherein the convex surface of the target part is an outer contour surface.
9. The method of claim 5, wherein the concave surface of the target part is an inner contour surface.
10. A combustion chamber annular thin-walled member obtained by using a method for processing a combustion chamber annular thin-walled member according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311169401.5A CN117124025A (en) | 2023-09-12 | 2023-09-12 | Annular thin-wall part of combustion chamber and processing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311169401.5A CN117124025A (en) | 2023-09-12 | 2023-09-12 | Annular thin-wall part of combustion chamber and processing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117124025A true CN117124025A (en) | 2023-11-28 |
Family
ID=88854437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311169401.5A Pending CN117124025A (en) | 2023-09-12 | 2023-09-12 | Annular thin-wall part of combustion chamber and processing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117124025A (en) |
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2023
- 2023-09-12 CN CN202311169401.5A patent/CN117124025A/en active Pending
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