CN114161087B - Processing method of valve assembly composed of dissimilar materials - Google Patents
Processing method of valve assembly composed of dissimilar materials Download PDFInfo
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- CN114161087B CN114161087B CN202111449205.4A CN202111449205A CN114161087B CN 114161087 B CN114161087 B CN 114161087B CN 202111449205 A CN202111449205 A CN 202111449205A CN 114161087 B CN114161087 B CN 114161087B
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- 239000000463 material Substances 0.000 title claims abstract description 67
- 238000003672 processing method Methods 0.000 title claims abstract description 12
- 238000003754 machining Methods 0.000 claims abstract description 36
- 238000012545 processing Methods 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 20
- 229910052755 nonmetal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 15
- 238000009826 distribution Methods 0.000 claims abstract description 5
- 238000005457 optimization Methods 0.000 claims abstract description 4
- 238000007514 turning Methods 0.000 claims description 43
- 238000003801 milling Methods 0.000 claims description 36
- 238000005520 cutting process Methods 0.000 claims description 18
- 239000007769 metal material Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 13
- 229920001971 elastomer Polymers 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 235000015842 Hesperis Nutrition 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical compound C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 239000002760 rocket fuel Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
- Turning (AREA)
Abstract
The invention discloses a processing method of a valve assembly composed of dissimilar materials, in particular to a processing method of a valve assembly composed of metal and nonmetal dissimilar materials in a novel carrier rocket pressurizing and conveying system, which comprises the following steps: step one, planning processing strategies of different areas according to the heterogeneous material distribution condition of the end face of the material; step two, carrying out structural improvement and process parameter optimization of a processing cutter; step three, realizing the mechanical processing of the end surface of the core characteristic dissimilar material in the valve assembly; and step four, finishing machining all the characteristics of the assembly. The invention can realize the efficient and precise machining and forming of the end faces of the dissimilar materials of the valve assembly, effectively improve the surface machining quality and the machining efficiency of the end faces of the valve assembly, greatly improve the sealing performance of the valve assembly and ensure the sealing reliability of the valve structure of the carrier rocket booster conveying system under complex working conditions.
Description
Technical Field
The invention relates to the field of machining, in particular to a machining method of a valve assembly composed of dissimilar materials.
Background
With the vigorous development of the Chinese aerospace industry, the new generation of carrier rockets carry the launching task of various space vehicles, and the development of the national space science field is effectively ensured. The core product of the new generation carrier rocket fuel pressurizing and conveying system is a valve, various valves are precisely and orderly opened and closed, the precise transmission of fuel in the pressurizing and conveying system is realized, the fuel supply pressure of an engine is controlled, and the flight state of the carrier rocket is directly influenced.
The key component for opening and closing the valve is a valve component, wherein the valve component is a product which is formed by machining a valve component blank made by placing a nonmetallic sealing ring into a metallic sealing groove through a hot pressing process according to the requirements of a design drawing, and therefore the valve component comprises a metallic matrix and two parts of the nonmetallic sealing ring. The non-metal sealing ring on the valve component is matched with the metal sealing spigot on the valve shell to form a sealing structure, and the valve is sealed and opened by applying variable load to the metal matrix of the valve component through the elastic element to form an automatically controlled opening and closing state between the non-metal sealing ring and the shell. The valve component has the strength of the metal matrix and the sealing performance of the nonmetal sealing ring, so that the valve component is widely applied to a general sealing structure of a valve.
The valve component nonmetal sealing ring of the new generation carrier rocket valve adopts novel rubber materials, and the rubber has excellent performances of heat resistance, cold resistance, hydrogen solvent resistance, acid and alkali resistance and low surface activity. The end face of the dissimilar material of the blank of the traditional valve component is formed by grinding, but the valve component of the new generation carrier rocket valve is found in the development process, compared with the common ethylene propylene rubber material, the rubber has lower toughness and structural strength, the rubber is easy to damage due to tangential grinding force, the phenomenon that small pits and roughness Ra0.8 are not up to standard due to the fact that the rubber surface material is lost (as shown in figure 2) occurs, the qualification rate of the product quality is only 20% -30%, and a large number of valve components are scrapped due to the machining quality problem.
In order to solve the problem that the quality stability of the product is not high caused by the traditional processing mode, the end face processing quality of the dissimilar materials of the valve assembly is improved, the quality cost of the production of the valve assembly is reduced, and the processing efficiency is improved, a brand new processing method is needed, the manufacturing difficulty of the valve assembly consisting of the dissimilar materials is solved, and the manufacturing cost of parts is greatly reduced.
Disclosure of Invention
The invention aims to provide a processing method of a valve assembly composed of dissimilar materials, which comprises the following steps: the processing strategy of different areas of the valve component, the processing technique of the end face of the core characteristic dissimilar material in the valve component and the mechanical processing technique of the valve component. The problems of quality problems such as non-metal surface material deficiency, ultra-poor roughness and the like in the valve assembly product processing process are solved, the manufacturing difficulty of the valve assembly composed of dissimilar materials is solved, the end face processing quality of the dissimilar materials of the valve assembly is improved, the quality cost of the valve assembly production is reduced, and the processing efficiency of the product is improved.
In order to achieve the above object, the present invention provides a method for processing a shutter assembly made of a heterogeneous material, comprising the steps of:
step one, planning processing strategies of different areas according to the heterogeneous material distribution condition of the end face of the material;
step two, carrying out structural improvement and process parameter optimization of a processing cutter;
step three, realizing the mechanical processing of the end surface of the core characteristic dissimilar material in the valve assembly;
and step four, finishing machining all the characteristics of the assembly.
The above-mentioned processing method of the valve assembly composed of dissimilar materials, wherein in the first step, the method includes:
1-1, turning a metal excircle of a valve assembly, wherein the machining strategy is to reserve allowance for rough machining and finish machining the excircle in place;
1-2, a turning and milling processing method is used for the end face of a dissimilar material consisting of metal and nonmetal of the valve assembly, and the processing strategy is as follows: rough finish machining and turning are carried out to remove metal materials on the outer side of the nonmetallic ring, so that the nonmetallic ring on the end face is exposed by more than 0.5 mm; rough finish machining and turning are carried out to remove metal materials on the inner side of the nonmetallic ring, wherein the metal materials with the width of 1mm are reserved on the boundary of the inner side metal and the nonmetallic ring and are used as a support body for turning nonmetallic rings; finally, a small-diameter milling cutter is used for removing 1mm of metal residues.
The processing method of the valve assembly composed of the dissimilar materials comprises the following steps:
2-1, improving a turning tool structure for turning nonmetal, optimizing technological parameters, improving parameters of a tool nose fillet, a front angle and a rear angle of the turning tool, optimizing cutting parameters of back cutting amount, linear speed and feeding speed, and improving the surface quality and the machining efficiency of turning molding of a nonmetal surface;
2-2, improving the spiral groove structure of the milling cutter and optimizing the technological parameters, wherein the spiral groove structure of the milling cutter is a straight groove structure, optimizing four cutting parameters of depth cutting, width cutting, feeding speed and main shaft rotating speed, reducing the cutting force of the milling cutter side edge on nonmetallic materials during milling and avoiding the material loss of the nonmetallic ring edge.
The above-mentioned processing method of the valve assembly composed of dissimilar materials, wherein, in the third step, it includes:
3-1, selecting a numerical control turning center or a turning and milling composite machining center with a milling power head, and ensuring the integral machining and one-step forming of the end face of the dissimilar material;
3-2, designing a special clamping tool for turning the valve assembly, keeping the valve assembly rotation center, the tool rotation center and the numerical control lathe rotation center consistent, and installing the valve assembly and the special clamping tool on the numerical control lathe rotation center;
3-3, compiling numerical control programs for milling and turning the end faces of the dissimilar materials, setting a machining origin, and finishing milling and turning the end faces of the dissimilar materials; turning, milling and turning of the end face of the dissimilar material at the other end are finished by means of positioning of an outer circle jacket tool, and the total length is ensured.
In the fourth step, a numerical control program is programmed by using a turning center to finish machining all the characteristics of the rest valve components.
The processing method of the valve assembly composed of the dissimilar materials, wherein in the step 1-1, the allowance is 0.2mm.
Compared with the prior art, the invention has the technical advantages that:
the whole processing technology system of the valve component is optimized by reasonably selecting a processing strategy, a cutter and a fixture, the quality problems of non-metal surface material deficiency, out-of-tolerance roughness and the like in the processing process of the valve component product are solved, the end face processing quality of the dissimilar material of the valve component is improved, and the product processing qualification rate is stabilized by more than 98 percent.
Drawings
A method of manufacturing a shutter assembly made of a heterogeneous material according to the present invention is shown in the following examples and drawings.
FIG. 1 is a schematic diagram of a construction of a shutter assembly;
FIG. 2 is a schematic illustration of non-metallic surface material loss and roughness out-of-tolerance of a shutter assembly;
FIG. 3 is a schematic view of a method of end face processing of dissimilar materials of a shutter assembly;
fig. 4 is a schematic view of a tool structure for cutting nonmetallic materials.
Wherein, the outer circle jacket is special for 1-metal material, 2-nonmetallic material and 3-special.
Detailed Description
A method of manufacturing a shutter assembly composed of a dissimilar material according to the present invention will be described in further detail with reference to the accompanying drawings.
The valve assembly is processed by the method of the invention, and the main steps are as follows:
step 1: according to the distribution condition of different materials of the valve assembly, planning the processing strategies of different areas, comprising the following steps:
step 11: the metal excircle of the valve component is machined by a turning method, wherein the machining strategy is to reserve a margin of 0.2mm for rough machining and then finish machining the excircle in place.
Step 12: the end surfaces of dissimilar materials consisting of metal and nonmetal of the valve component are subjected to turning and milling, and the processing strategy is as follows according to the distribution situation of the metal and nonmetal (shown in figure 3): firstly, a milling cutter is used for processing and removing the metal material in the area A, and the milling depth is 0.5m; milling a metal material in a region C, wherein the milling depth is 0.5mm, and the metal material with the width of 1mm is reserved at the boundary between the region B and the region C and is used as a nonmetal support body in a region B; turning nonmetallic materials in the area B from outside to inside by using a turning tool; a Φ2 mill was used to remove the metal material remaining 1mm wide in the C region.
Step 2: carrying out structural improvement and process parameter optimization of a machining tool according to a machining strategy, wherein the method comprises the following steps of:
step 21: when the nonmetallic material is turned, a turning tool with a tool nose fillet smaller than R0.1mm, a front angle gamma of 55 degrees and a rear angle alpha of 10-15 degrees is selected, technological parameters are optimized, the nonmetallic material in the area B is turned from outside to inside, the back cutting amount ap=0.25 mm, the linear speed Vc=32 m/min and the feeding speed f=0.05 mm/r, and the surface quality and the processing efficiency of turning molding of the nonmetallic surface are improved.
Step 22: the milling cutter for removing the metal material with the residual thickness of 1mm in the C area is an phi 2mm asymmetric straight flute milling cutter, milling technological parameters are optimized, the cutting depth is 0.1mm, the cutting width is 1mm, the feeding speed is 200mm/min, the rotating speed is 1300r/min, vibration of the cutter and cutting force of the side edge of the milling cutter on the nonmetallic material during cutting are reduced, and material loss at the boundary of a nonmetallic ring is avoided.
Step 3: realize the mechanical processing of the end face of the core characteristic dissimilar material in the valve component, comprising the following steps:
step 31: and selecting a numerical control turning center with a milling power head or a turning and milling composite machining center, otherwise, the integral machining one-step forming of the end face of the dissimilar material cannot be ensured.
Step 32: and designing a special turning outer circle jacket tool (shown in fig. 4) of the valve assembly, so that the valve assembly rotation center, the tool rotation center and the numerically controlled lathe rotation center are kept consistent, and installing the valve assembly and the special clamping tool on the numerically controlled turning center.
Step 33: compiling numerical control programs for milling and turning the end faces of the dissimilar materials, setting a machining origin, and finishing milling and turning the end faces of the dissimilar materials; turning, and quickly positioning by means of an outer circle jacket tool to finish the end face milling and turning of the dissimilar materials at the other end, so that the total length is ensured to be 30.4+/-0.1 mm.
Step 4: and programming a turning numerical control program, and finishing machining of the characteristics of the residual outer ring grooves of the residual valve components by using a turning center.
Claims (4)
1. A method of manufacturing a valve assembly of dissimilar materials comprising the steps of:
step one, planning processing strategies of different areas according to the heterogeneous material distribution condition of the end face of the material;
step two, carrying out structural improvement and process parameter optimization of a processing cutter;
step three, realizing the mechanical processing of the end surface of the core characteristic dissimilar material in the valve assembly;
step four, finishing the machining of all the characteristics of the assembly,
the first step includes:
1-1, turning a metal excircle of a valve assembly, wherein the machining strategy is to reserve allowance for rough machining and finish machining the excircle in place;
1-2, a turning and milling processing method is used for the end face of a dissimilar material consisting of metal and nonmetal of the valve assembly, and the processing strategy is as follows: rough finish machining and turning are carried out to remove metal materials on the outer side of the nonmetallic ring, so that the nonmetallic ring on the end face is exposed by more than 0.5 mm; rough finish machining and turning are carried out to remove metal materials on the inner side of the nonmetallic ring, wherein the metal materials with the width of 1mm are reserved on the boundary of the inner side metal and the nonmetallic ring and are used as a support body for turning nonmetallic rings; finally, a small-diameter milling cutter is used for removing metal residues of 1mm,
in the third step, the method includes:
3-1, selecting a numerical control turning center or a turning and milling composite machining center with a milling power head, and ensuring the integral machining and one-step forming of the end face of the dissimilar material;
3-2, designing a special clamping tool for turning the valve assembly, keeping the valve assembly rotation center, the tool rotation center and the numerical control lathe rotation center consistent, and installing the valve assembly and the special clamping tool on the numerical control lathe rotation center;
3-3, compiling numerical control programs for milling and turning the end faces of the dissimilar materials, setting a machining origin, and finishing milling and turning the end faces of the dissimilar materials; turning, milling and turning of the end face of the dissimilar material at the other end are finished by means of positioning of an outer circle jacket tool, and the total length is ensured.
2. The method of claim 1, wherein the second step comprises:
2-1, improving a turning tool structure for turning nonmetal, optimizing technological parameters, improving parameters of a tool nose fillet, a front angle and a rear angle of the turning tool, optimizing cutting parameters of back cutting amount, linear speed and feeding speed, and improving the surface quality and the machining efficiency of turning molding of a nonmetal surface;
2-2, improving the spiral groove structure of the milling cutter and optimizing the technological parameters, wherein the spiral groove structure of the milling cutter is a straight groove structure, optimizing four cutting parameters of depth cutting, width cutting, feeding speed and main shaft rotating speed, reducing the cutting force of the milling cutter side edge on nonmetallic materials during milling and avoiding the material loss of the nonmetallic ring edge.
3. The method of claim 1, wherein in the fourth step, a numerical control program is programmed by a turning center to complete machining of all the features of the remaining shutter assembly.
4. A method of manufacturing a valve assembly of dissimilar materials as claimed in claim 1, wherein the margin is 0.2mm in step 1-1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111449205.4A CN114161087B (en) | 2021-12-01 | 2021-12-01 | Processing method of valve assembly composed of dissimilar materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111449205.4A CN114161087B (en) | 2021-12-01 | 2021-12-01 | Processing method of valve assembly composed of dissimilar materials |
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| Publication Number | Publication Date |
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| CN114161087A CN114161087A (en) | 2022-03-11 |
| CN114161087B true CN114161087B (en) | 2023-11-28 |
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| CN202111449205.4A Active CN114161087B (en) | 2021-12-01 | 2021-12-01 | Processing method of valve assembly composed of dissimilar materials |
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| Publication number | Publication date |
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| CN114161087A (en) | 2022-03-11 |
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