CN114161087A - Method for processing valve assembly made of dissimilar materials - Google Patents
Method for processing valve assembly made of dissimilar materials Download PDFInfo
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- CN114161087A CN114161087A CN202111449205.4A CN202111449205A CN114161087A CN 114161087 A CN114161087 A CN 114161087A CN 202111449205 A CN202111449205 A CN 202111449205A CN 114161087 A CN114161087 A CN 114161087A
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- 239000000463 material Substances 0.000 title claims abstract description 61
- 238000012545 processing Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000003754 machining Methods 0.000 claims abstract description 38
- 229910052755 nonmetal Inorganic materials 0.000 claims abstract description 35
- 239000002184 metal Substances 0.000 claims abstract description 17
- 238000009826 distribution Methods 0.000 claims abstract description 5
- 238000003801 milling Methods 0.000 claims description 37
- 239000007769 metal material Substances 0.000 claims description 19
- 238000005520 cutting process Methods 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 13
- 229920001971 elastomer Polymers 0.000 description 4
- 239000002585 base Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000003672 processing method 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
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 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
- 238000012797 qualification Methods 0.000 description 1
- 239000002760 rocket fuel Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
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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)
- Turning (AREA)
- Milling Processes (AREA)
Abstract
The invention discloses a method for processing a valve component made of dissimilar materials, in particular to a method for processing a valve component made of metal and nonmetal dissimilar materials in a novel carrier rocket pressurized conveying system, which comprises the following steps: firstly, planning processing strategies of different areas according to the distribution condition of dissimilar materials on the end surface of the end surface; secondly, improving the structure of the machining cutter and optimizing technological parameters; step three, the mechanical processing of the end face of the core characteristic heterogeneous material in the valve assembly is realized; and step four, finishing the machining of all the characteristics of the assembly. The invention can realize the high-efficiency precision machining and forming of the end surface of the dissimilar material of the valve component, effectively improve the surface machining quality and the machining efficiency of the end surface, greatly improve the sealing performance of the valve component and ensure the sealing reliability of the valve structure of the pressurized conveying system of the carrier rocket under the complex working condition.
Description
Technical Field
The invention relates to the field of machining, in particular to a method for machining a valve assembly made of dissimilar materials.
Background
With the vigorous development of the aerospace industry in China, the new generation of carrier rockets carry the launching tasks of various types of space vehicles, and the development of the national space science field is effectively guaranteed. The core product of the new generation of carrier rocket fuel pressurizing and conveying system is a valve, and various valves are opened and closed precisely and orderly, so that 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 a carrier rocket is directly influenced.
The valve assembly is a valve assembly which is a product formed by machining a valve assembly blank manufactured by placing a nonmetal sealing ring into a metal sealing groove by a hot pressing process according to the design drawing requirements, and therefore the valve assembly comprises a metal base body and the nonmetal sealing ring. The non-metal sealing ring on the valve assembly is matched with the metal sealing spigot on the valve shell to form a sealing structure, and the elastic element applies variable load to the metal base body of the valve assembly to enable the non-metal sealing ring and the shell to form an automatically controlled opening and closing state, so that the valve is sealed and opened. The valve assembly has the strength of the metal base body and the sealing performance of the nonmetal sealing ring, so that the valve assembly is widely applied to a general sealing structure of the valve.
The valve assembly nonmetal sealing ring of the new generation carrier rocket valve is made of a novel rubber material, 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 a dissimilar material of a traditional valve component blank is formed by grinding, but the valve component of a new generation of carrier rocket valve is discovered in the development process, compared with a common ethylene propylene rubber material, the rubber has lower toughness and structural strength, is easy to damage under the action of tangential grinding force, has the phenomena that a small pit and the roughness Ra0.8 caused by the loss of a rubber surface material do not reach the standard (as shown in figure 2), the product quality qualified rate is only 20-30%, and a large number of valve components are scrapped due to the problem of machining quality.
In order to solve the problems that the product quality stability is not high, the processing quality of the end face of the valve component made of different materials is improved, the quality cost of the valve component production is reduced, and the processing efficiency is improved, a brand new processing method is urgently needed, the manufacturing problem of the valve component made of different materials is solved, and the manufacturing cost of parts is greatly reduced.
Disclosure of Invention
The invention aims to provide a method for processing a valve component made of different materials, which comprises the following steps: the valve component comprises processing strategies of different areas of the valve component, a technological method for processing the end face of the core characteristic dissimilar material in the valve component and a mechanical processing technological method of the valve component. The valve component solves the quality problems of non-metal surface material loss, poor roughness and the like in the processing process of valve component products, solves the manufacturing problem of the valve component consisting of dissimilar materials, improves the processing quality of the end faces of the dissimilar materials of the valve component, reduces the quality cost of the valve component production, and improves the processing efficiency of the products.
In order to achieve the above object, the present invention provides a method for processing a shutter assembly composed of dissimilar materials, comprising the steps of:
firstly, planning processing strategies of different areas according to the distribution condition of dissimilar materials on the end surface of the end surface;
secondly, improving the structure of the machining cutter and optimizing technological parameters;
step three, the mechanical processing of the end face of the core characteristic heterogeneous material in the valve assembly is realized;
and step four, finishing the machining of all the characteristics of the assembly.
The method for processing the valve assembly made of the dissimilar materials comprises the following steps:
1-1, turning the metal excircle of the valve assembly by using a turning method, wherein the machining strategy is to firstly reserve allowance for rough machining and then finish machining the excircle in place;
1-2, turning and milling the end surface of the dissimilar material consisting of metal and nonmetal of the valve assembly, wherein the processing strategy is as follows: turning and removing metal materials on the outer side of the non-metal ring by rough and finish machining to expose the non-metal ring on the end face by more than 0.5 mm; turning and removing metal materials on the inner side of the nonmetal ring by rough and finish machining, wherein the metal materials with the width of 1mm are left on the boundary of the inner side metal and the nonmetal ring and are used as a support body for turning nonmetal; finally, a small-diameter milling cutter is used for removing 1mm of metal residues.
The second step of the method for processing the valve assembly made of the dissimilar materials includes:
2-1, improving a non-metal turning tool structure, optimizing technological parameters, improving parameters of a tool tip fillet, a front angle and a rear angle of the turning tool, optimizing cutting parameters of back cutting amount, linear speed and feed speed, and improving the surface quality and the processing efficiency of turning molding of a non-metal surface;
2-2, improving the spiral groove structure of the milling cutter and optimizing process parameters, wherein the spiral groove structure of the milling cutter is a straight groove structure, four cutting parameters of cutting depth, cutting width, feeding speed and main shaft rotating speed are optimized, the cutting force of a side edge of the milling cutter on a non-metal material during milling is reduced, and material loss of the edge of the non-metal ring is avoided.
The method for processing the valve assembly made of the dissimilar materials comprises the following steps:
3-1, selecting a numerical control turning center or a turning and milling combined machining center with a milling power head to ensure that the end face of the dissimilar material is integrally machined and formed at one time;
3-2, designing a special turning clamping tool for the valve assembly to enable the rotation center of the valve assembly, the rotation center of the tool and the rotation center of the numerical control lathe to be consistent, and mounting the valve assembly and the special clamping tool on the numerical control turning center;
3-3, compiling a heterogeneous material end face milling and turning numerical control program, setting a processing original point, and finishing the heterogeneous material end face milling and turning; turning around, finishing the milling and turning of the end face of the dissimilar material at the other end by positioning through the outer circle jacket tool, and ensuring the total length.
In the fourth step, a turning center is utilized to program a numerical control program, and the mechanical processing of all the characteristics of the rest valve assemblies is completed.
The method for processing the valve assembly made of the dissimilar materials comprises the following step 1-1, wherein the balance is 0.2 mm.
Compared with the prior art, the invention has the technical beneficial effects that:
by reasonably selecting a machining strategy, a cutter and a fixture tool and optimizing the whole machining process system of the valve assembly, the quality problems of non-metal surface material loss, poor roughness and the like in the machining process of a valve assembly product are solved, the machining quality of the end face of the valve assembly made of dissimilar materials is improved, the product machining qualification rate is stable by over 98 percent, and the method can be quickly popularized in the machining industry.
Drawings
The method for manufacturing the valve assembly made of different materials according to the present invention is provided by the following embodiments and the accompanying drawings.
FIG. 1 is a schematic view of a shutter assembly;
FIG. 2 is a schematic view of non-metallic surface material missing and roughness out-of-tolerance of the valve assembly;
FIG. 3 is a schematic view of a method for machining the end face of the valve assembly made of dissimilar materials;
fig. 4 is a schematic view of a cutter for cutting a non-metallic material.
Wherein, 1-metal material, 2-nonmetal material, and 3-special excircle jacket.
Detailed Description
Hereinafter, a method for manufacturing a shutter assembly made of a different material according to the present invention will be described in further detail with reference to the accompanying drawings.
In this embodiment, the method of the present invention is used to process the valve assembly, and the main steps are as follows:
step 1: planning processing strategies of different areas according to the distribution condition of the heterogeneous materials of the valve assembly, and the method comprises the following steps:
step 11: the metal excircle of the valve assembly is machined by a turning method, wherein the machining strategy is to firstly reserve a margin of 0.2mm for rough machining and then finish machining the excircle in place.
Step 12: the end face of the dissimilar material consisting of metal and nonmetal of the valve assembly is machined by turning and milling, and according to the distribution condition of the metal and the nonmetal (as shown in fig. 3), the machining strategy is as follows: firstly, a milling cutter is used for processing and removing the metal material in the area A, and the milling depth is 0.5 m; milling the metal material in the C area to a milling depth of 0.5mm, wherein the metal material with the width of 1mm is reserved at the boundary of B and C and is used as a nonmetal support body for turning the B area; turning the non-metallic material of the B area from outside to inside by using a turning tool; and removing the residual metal material with the width of 1mm in the C area by using a phi 2 milling cutter.
Step 2: the method for improving the structure and optimizing the technological parameters of the machining tool according to the machining strategy comprises the following steps:
step 21: when the non-metallic material is turned, a turning tool with a tool tip fillet smaller than R0.1mm, a front angle gamma of 55 degrees and a rear angle alpha of 10-15 degrees is selected and technological parameters are optimized, the non-metallic material in a B area is turned from outside to inside, the back tool depth ap is 0.25mm, the linear speed Vc is 32m/min, the feed speed f is 0.05mm/r, and the surface quality and the processing efficiency of turning forming of the non-metallic surface are improved.
Step 22: and the milling cutter for removing 1mm of residual metal material in the C area selects a phi 2mm asymmetric straight-flute milling cutter, optimizes milling technological parameters, cuts 0.1mm in depth, 1mm in width, 200mm/min in feeding speed and 1300r/min in rotating speed, reduces vibration of the cutter and cutting force of a side edge of the milling cutter on the non-metal material during cutting, and avoids material loss of a non-metal ring boundary.
And step 3: the mechanical processing of the end face of the heterogeneous material with the core characteristics in the valve assembly is realized, and the mechanical processing method comprises the following steps:
step 31: and selecting a numerical control turning center or a turning and milling combined machining center with a milling power head, otherwise, the integral machining one-step forming of the end face of the dissimilar material cannot be ensured.
Step 32: the special excircle jacket tool for turning of the valve assembly is designed (as shown in figure 4), so that the rotation center of the valve assembly, the rotation center of the tool and the rotation center of the numerical control lathe are kept consistent, and the valve assembly and the special clamping tool are installed on the numerical control turning center together.
Step 33: compiling a numerical control program for milling and turning the end face of the dissimilar material, setting a processing origin, and finishing the milling and turning of the end face of the dissimilar material; turning around, and quickly positioning by means of an excircle jacket tool to finish end face milling and turning of the dissimilar materials at the other end, and ensuring that the total length is 30.4 +/-0.1 mm.
And 4, step 4: and compiling a turning numerical control program, and finishing the machining of the characteristics of the residual outer circular ring groove of the residual valve assembly by using a turning center.
Claims (6)
1. A method for processing a valve component made of dissimilar materials is characterized by comprising the following steps:
firstly, planning processing strategies of different areas according to the distribution condition of dissimilar materials on the end surface of the end surface;
secondly, improving the structure of the machining cutter and optimizing technological parameters;
step three, the mechanical processing of the end face of the core characteristic heterogeneous material in the valve assembly is realized;
and step four, finishing the machining of all the characteristics of the assembly.
2. The method for manufacturing a shutter assembly made of dissimilar materials according to claim 1, wherein the first step comprises:
1-1, turning the metal excircle of the valve assembly by using a turning method, wherein the machining strategy is to firstly reserve allowance for rough machining and then finish machining the excircle in place;
1-2, turning and milling the end surface of the dissimilar material consisting of metal and nonmetal of the valve assembly, wherein the processing strategy is as follows: turning and removing metal materials on the outer side of the non-metal ring by rough and finish machining to expose the non-metal ring on the end face by more than 0.5 mm; turning and removing metal materials on the inner side of the nonmetal ring by rough and finish machining, wherein the metal materials with the width of 1mm are left on the boundary of the inner side metal and the nonmetal ring and are used as a support body for turning nonmetal; finally, a small-diameter milling cutter is used for removing 1mm of metal residues.
3. A method for manufacturing a shutter assembly made of dissimilar materials according to claim 1, wherein the second step comprises:
2-1, improving a non-metal turning tool structure, optimizing technological parameters, improving parameters of a tool tip fillet, a front angle and a rear angle of the turning tool, optimizing cutting parameters of back cutting amount, linear speed and feed speed, and improving the surface quality and the processing efficiency of turning molding of a non-metal surface;
2-2, improving the spiral groove structure of the milling cutter and optimizing process parameters, wherein the spiral groove structure of the milling cutter is a straight groove structure, four cutting parameters of cutting depth, cutting width, feeding speed and main shaft rotating speed are optimized, the cutting force of a side edge of the milling cutter on a non-metal material during milling is reduced, and material loss of the edge of the non-metal ring is avoided.
4. A method for manufacturing a shutter assembly made of dissimilar materials according to claim 1, wherein the third step comprises:
3-1, selecting a numerical control turning center or a turning and milling combined machining center with a milling power head to ensure that the end face of the dissimilar material is integrally machined and formed at one time;
3-2, designing a special turning clamping tool for the valve assembly to enable the rotation center of the valve assembly, the rotation center of the tool and the rotation center of the numerical control lathe to be consistent, and mounting the valve assembly and the special clamping tool on the numerical control turning center;
3-3, compiling a heterogeneous material end face milling and turning numerical control program, setting a processing original point, and finishing the heterogeneous material end face milling and turning; turning around, finishing the milling and turning of the end face of the dissimilar material at the other end by positioning through the outer circle jacket tool, and ensuring the total length.
5. The method for processing a shutter assembly formed of a heterogeneous material according to claim 1, wherein in the fourth step, a turning center is used to program a numerical control program to complete the mechanical processing of all the characteristics of the remaining shutter assemblies.
6. A method for fabricating a shutter assembly made of heterogeneous material according to claim 1, wherein the margin is 0.2mm in the step 1-1.
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| CN202111449205.4A CN114161087B (en) | 2021-12-01 | 2021-12-01 | Processing method of valve assembly composed of dissimilar materials |
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| CN202111449205.4A CN114161087B (en) | 2021-12-01 | 2021-12-01 | Processing method of valve assembly composed of dissimilar materials |
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| CN114161087B CN114161087B (en) | 2023-11-28 |
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| CN113020913A (en) * | 2021-03-17 | 2021-06-25 | 北京理工大学 | Flexible joint processing method |
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