CN117380981A - Method for processing sealing surface of molded air valve - Google Patents
Method for processing sealing surface of molded air valve Download PDFInfo
- Publication number
- CN117380981A CN117380981A CN202311538236.6A CN202311538236A CN117380981A CN 117380981 A CN117380981 A CN 117380981A CN 202311538236 A CN202311538236 A CN 202311538236A CN 117380981 A CN117380981 A CN 117380981A
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- metal part
- machining
- metal
- tool
- air valve
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- 238000007789 sealing Methods 0.000 title claims abstract description 82
- 238000012545 processing Methods 0.000 title claims description 30
- 238000000034 method Methods 0.000 title claims description 25
- 239000002184 metal Substances 0.000 claims abstract description 94
- 229910052751 metal Inorganic materials 0.000 claims abstract description 94
- 238000003754 machining Methods 0.000 claims abstract description 55
- 229910052755 nonmetal Inorganic materials 0.000 claims abstract description 49
- 239000010437 gem Substances 0.000 claims abstract description 25
- 229910001751 gemstone Inorganic materials 0.000 claims abstract description 25
- 239000000126 substance Substances 0.000 claims abstract description 6
- 238000003672 processing method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 239000000463 material Substances 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000003825 pressing Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007723 die pressing method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B1/00—Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention provides a processing method of a sealing surface of a molded air valve, which comprises the following steps: s1, selecting different cutters when machining the sealing end face of the air valve, selecting a precious stone lathe tool when machining the sealing surface of a non-metal part, and selecting metal machining cutters when machining a first metal part and a second metal part; s2, machining nonmetallic parts by using a precious stone lathe tool, and machining a first metal part and a second metal part by using a metal machining tool; s3, feeding from the boundary line between the first metal part and the non-metal part to one side of the non-metal part, turning the non-metal part from outside to inside by adopting a precious stone turning tool, and retracting the tool from the boundary line between the non-metal part and the second metal part to the position of the non-metal part; s4, re-cutting the non-metal surface from the initial cutting position in S3, and turning the first metal part from inside to outside by adopting a metal machining cutter; s5, cutting the second metal part from the position of the non-metal surface machining tool withdrawal in S3 by turning the second metal part from outside to inside by adopting a metal machining tool. S6, removing redundant substances.
Description
Technical Field
The invention belongs to the technical field of machining products, and particularly relates to a method for machining a sealing surface of a molded air valve.
Background
The sealing element air valve for the electromagnetic pneumatic valve adopts a mould pressing structure because of smaller size of parts: the sealing surface end is formed by a first metal part, a non-metal part and a second metal part from outside to inside, and the non-metal part used for sealing in the middle is formed by die pressing. Because the sealing performance requirement of the product is high, the sealing leakage rate helium detection requirement of the sealing pair is less than or equal to 10 - 5 Pa.m 3 And/s, the roughness requirement on the sealing surface of the air valve of the sealing element is high, and in addition, the parts need to be inspected under a 10-time microscope without excessive residues.
The existing processing method adopts a metal processing cutter to process the whole sealing surface from outside to inside, or adopts a precious stone lathe tool to process the whole sealing surface from outside to inside, and adopts grinding to process the whole sealing surface.
The roughness of the nonmetallic sealing surface is difficult to meet the requirement by adopting a single metal processing tool, the roughness of the nonmetallic sealing surface is difficult to meet the requirement by adopting a single precious stone lathe tool, the tool is fast in abrasion and the cost is too high, and the nonmetallic surface can be embedded by metal scrap generated during processing by the current processing method, so that the superfluous matters are difficult to meet the requirement.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a processing method of a molded air valve sealing surface, which enables the roughness of a nonmetallic sealing surface and the performance index of spare parts to meet the requirements.
The technical scheme adopted by the invention is as follows:
a processing method of a sealing surface of a molded air valve comprises the following steps:
s1, selecting a cutter: different cutters are selected when the sealing end face of the air valve is machined, a precious stone lathe tool is selected when the sealing face of the non-metal part is machined, and metal machining cutters are selected when the first metal part and the second metal part are machined;
s2, part processing: machining nonmetallic parts by using a precious stone lathe tool, and machining a first metal part and a second metal part by using a metal machining tool;
s3, a nonmetallic surface machining feed line: feeding from the boundary line between the first metal part and the non-metal part to one side of the non-metal part, turning the non-metal part from outside to inside by adopting a precious stone turning tool, and retracting the tool from the boundary line between the non-metal part and the second metal part to the position of the non-metal part;
s4, machining a feeding route of the first metal part: cutting again from the position of the initial cutting position of the non-metal surface in S3, and turning the first metal part from inside to outside by adopting a metal machining cutter;
s5, machining a feeding route of the second metal part: and (3) cutting the second metal part from the position of the non-metal surface machining tool withdrawal to the tool again, and turning the second metal part from outside to inside by adopting a metal machining tool.
S6, removing redundant substances.
The S1 also comprises tool mounting and tool setting, and when the tool is set, the heights of the tool tips of the precious stone turning tool for machining the nonmetallic parts and the metal machining tool for machining the metallic parts are kept consistent.
And S3, turning the boundary line between the first metal part and the non-metal part to the position phi 2.6 of the non-metal part, and finishing axial tool withdrawal from the position phi 0.6.
The cutter entering position in the S4 is separated from the cutter entering position in the S3 by 0.05mm, and particularly the cutter entering position in phi 2.5.
And the cutter entering position in the step S5 is from phi 0.65.
Further, the cutting depth adopted in the turning in the step S3 is 0.03-0.04mm, and the feeding amount is 0.01-0.03mm.
Further, the rotation speed of the lathe processing in the step S3 is 2500-3000r/min.
In the step S6, a rounding angle is added in a programming mode when the first metal part is processed, surplus materials generated on the circumference can be removed, and surplus materials at the intersection of the square and the end face of the first metal part are manually removed.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
the two kinds of cutters respectively process different areas of the sealing surface, can meet the high-precision requirement of Ra0.2, and also avoid the problem of rapid abrasion of the non-metal sealing surface processed by the jewel turning tool. Secondly, the invention adjusts the feed route, firstly uses the precious stone lathe tool to process the nonmetallic part, and then uses the metal processing tool to process the first metallic part and the second metallic part, so that the scrap iron generated during processing is arranged on the outer side of the first metallic part, and is convenient to remove.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the structure of an air valve according to embodiment 1 of the present invention;
FIG. 2 is a schematic view of a seal formed by the valve and the valve seat;
FIG. 3 is a schematic drawing of a nonmetallic sealing face end tooling feed;
FIG. 4 is a schematic drawing of a first metal part seal face machining feed;
fig. 5 is a schematic drawing of a second metal part seal end face machining feed.
Description of the drawings: 1-metal part number one, 2-metal part number two, 3-non-metal part, 4-disk seat.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which a product of the application is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The present invention is described in detail below with reference to fig. 1-5.
Example 1
A processing method of a sealing surface of a molded air valve comprises the following steps:
s1, selecting a cutter: different cutters are selected when the sealing end face of the air valve is machined, a precious stone lathe tool is selected when the sealing face of the non-metal part 3 is machined, and metal machining cutters are selected when the first metal part 1 and the second metal part 2 are machined. After the tool is selected, the tool is mounted and set, and the heights of the tool tips of the jewel turning tool for machining the nonmetallic part 3 and the metal machining tool for machining the metallic part are kept consistent during the setting. The whole surface of the nonmetallic sealing end surface can be ensured to be flush.
S2, part processing: the non-metal part 3 is processed by a precious stone turning tool, and the first metal part 1 and the second metal part 2 are processed by a metal processing tool.
The structure of the S3 sealing pair is shown in figure 2, the position of the sealing ring belt is phi 0.9 mm-phi 1.2mm, and knife-receiving marks affecting sealing cannot be formed in the sealing ring belt +/-0.2 mm (namely phi 0.7 mm-phi 1.4 mm) of the sealing ring belt formed by the nonmetal member 3 filled by mould pressing and the sealing surface of the valve seat 4. Sealing surface inspection: the structure of the sealing pair is shown in fig. 2, the position of the sealing ring belt is phi 0.9 mm-phi 1.2mm, and any defect affecting sealing is not required in the sealing ring belt + -0.2 mm (namely phi 0.7 mm-phi 1.4 mm) formed by the nonmetal 3 filled by the air valve through mould pressing and the sealing surface of the valve seat 4 under the inspection of a 10-time microscope.
S3, a nonmetallic surface machining feed line: feeding from the boundary line between the first metal part 1 and the non-metal part 3 to one side of the non-metal part 3, turning the non-metal part from outside to inside by adopting a precious stone turning tool at the position phi 2.6 in the feeding body position figure 3, and retracting the tool from the position of the boundary line between the non-metal part 3 and the second metal part 2 to the position of the non-metal part 3, wherein the retracting body position is phi 0.6 in figure 3. The nonmetallic surface machining feed route is in the first, second and third directions of arrows in figure 3. In order to ensure that the roughness of the sealing end surface of the non-metal part 3 is Ra0.2, the cutting depth of 0.03mm and the feeding amount of 0.01mm are adopted in S3 non-metal processing, and the processing rotating speed of the lathe is 2800r/min under the condition that the temperature of a cutter cannot cause the performance change of a non-metal sealing surface.
S4, machining feeding route of the first metal part 1: and (3) re-cutting from the initial cutting position of the non-metal surface in S3, wherein the cutting position is phi 2.5 in FIG. 4, the metal machining tool is adopted to turn the first metal part 1 from inside to outside, and the machining feed route of the first metal part 1 is in the directions of four and five arrows in FIG. 4.
S5, machining a feeding route of the second metal part 2: and (3) cutting again from the non-metal surface machining tool withdrawal position in S3, wherein the cutting feeding specific position is phi 0.65 in FIG. 5, and turning the second metal part 2 from outside to inside by adopting a metal machining tool, wherein the second metal machining tool feeding route is in the six and seven directions of arrows in FIG. 5.
S6, removing redundant materials: the rounding angle is added in the programming process when the first metal part 1 is processed, redundant materials generated on the circumference can be removed, redundant materials at the intersection of the square and the sealing end face are manually removed, and scrap iron generated in the processing process is arranged on the outer side of the first metal part 1, so that the scrap iron is convenient to remove.
After the removal of the redundancy is completed, a check is performed, which includes:
and (5) detecting surplus substances: checking under a 10-fold microscope for absence of redundancy; and (3) roughness detection: the roughness requirement of the nonmetallic sealing surface is Ra0.2, and the roughness requirement of the metal surface flush with the nonmetallic sealing surface is Ra3.2.
The structure of the air valve is shown in fig. 1, the air valve comprises a first metal part 1 and a second metal part 2, an assembly is formed by press-fitting the first metal part 1 and the second metal part 2, a ring groove is formed between the first metal part 1 and the second metal part 2, and a nonmetal part 3 is filled in the ring groove in a mould pressing mode. The external dimension of the air valve is phi 5mm in external diameter multiplied by 5mm in length, and the diameter of the second metal piece is phi 0.5mm. The design requires that the sealing surface end of the air valve is a plane, and the sealing surface end is made of metal materials, nonmetallic materials and metal materials from outside to inside. The roughness requirement of the nonmetallic sealing surface is Ra0.2, and the roughness requirement of the metal surface flush with the nonmetallic sealing surface is Ra3.2. Secondly, the sealing performance requirement of the valve is high, and the sealing leakage rate helium detection requirement of the sealing pair is less than or equal to 10 -5 Pa.m 3 And/s, so the control requirement on the redundant substances is high, and the parts in the valve cavity need to be checked under a microscope of 10 times without the redundant substances. Because of the small size of the parts, the machining process produces excessive materials such as near the nonmetallic sealing element, is not easy to operate when being removed, and is easy to damage the sealing surface.
The following conventional machining methods are commonly used at present to process the sealing surface of the air valve: (1) The whole sealing surface end is processed from outside to inside by adopting a metal processing cutter; (2) The whole sealing surface is processed from outside to inside by adopting a jewel turning tool; and (3) grinding the whole sealing surface. The three methods have the following defects: (1) The sealing surface is composed of a first metal part 1, a second metal part 2 and a non-metal part 3, the whole sealing surface is processed by adopting a metal processing cutter, and the metal processing cutter can not meet the requirement of the roughness Ra0.2 of the sealing surface of the non-metal part 3 in the face of different areas of the sealing surface. (2) The whole sealing surface is processed by adopting the jewel turning tool, the tool wear is faster, and the jewel turning tool is more expensive, so the cost is high. (3) During grinding, the grinding paste can be embedded into the nonmetallic sealing face, and the embedded grinding paste can influence the sealing performance of the sealing pair.
The processing method of the molded air valve sealing surface adopted by the invention is that two kinds of cutters respectively process different areas of the sealing surface, and the precious stone lathe tool can meet the high precision requirement of Ra0.2 under the conditions of cutting depth of 0.03mm, feeding amount of 0.01mm and rotating speed of 2800r/min, and also avoid the problem of rapid abrasion of the precious stone lathe tool for processing the metal sealing surface. Secondly, the invention adjusts the feed route, firstly uses the precious stone lathe tool to process the nonmetallic part 3, and then uses the metal processing tool to process the first metallic part 1 and the second metallic part 2, so that the scrap iron generated during the processing is arranged on the outer side of the first metallic part 1, and the scrap iron is convenient to remove.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The method for processing the sealing surface of the molded air valve is characterized by comprising the following steps of:
s1, selecting a cutter: different cutters are selected when the sealing end face of the air valve is machined, a precious stone lathe tool is selected when the sealing face of the non-metal part (3) is machined, and metal machining cutters are selected when the first metal part (1) and the second metal part (2) are machined;
s2, part processing: machining nonmetallic parts (3) by using a precious stone turning tool, and machining a first metallic part (1) and a second metallic part (2) by using a metal machining tool;
s3, a nonmetallic surface machining feed line: feeding from the boundary line of the first metal part (1) and the non-metal part (3) to one side of the non-metal part (3), turning the non-metal part from outside to inside by adopting a precious stone turning tool, and retracting the tool from the boundary line of the non-metal part (3) and the second metal part (2) to the position of the non-metal part (3);
s4, machining a feeding route of the first metal part (1): cutting the first metal part (1) from the initial cutting position of the non-metal surface in S3 by turning the first metal part from inside to outside by adopting a metal machining cutter;
s5, machining a feeding route of the second metal part (2): and (3) cutting the second metal part (2) from outside to inside by adopting a metal processing cutter from the position of non-metal surface processing tool withdrawal.
S6, removing redundant substances.
2. The method for machining a sealing surface of a molded air valve according to claim 1, wherein the step S1 further comprises tool mounting and tool setting, and the heights of the cutting edges of the jewel tool for machining the nonmetallic part (3) and the metal machining tool for machining the metallic part are kept uniform during tool setting.
3. The method for machining the sealing surface of the molded air valve according to claim 1, wherein the boundary line between the first metal part (1) and the non-metal part (3) is positioned close to the non-metal part (3), specifically at the position phi 2.6, and turning is finished until the position phi 0.6 is reached.
4. The method for processing the sealing surface of the molded air valve according to claim 1, wherein the cutter-in position in the step S4 is spaced from the cutter-in position in the step S3 by 0.05mm, specifically by 2.5 mm.
5. The method for processing a sealing surface of a molded air valve according to claim 1, wherein the position of the cutter in the step S5 is from phi 0.65.
6. A method for processing a sealing surface of a molded air valve according to claim 1 or 3, wherein the cutting depth used in the turning in the step S3 is 0.03-0.04mm, and the feeding amount is 0.01-0.03mm.
7. A method for processing a sealing surface of a molded air valve according to claim 1 or 3, wherein the rotational speed of the lathe processing in S3 is 2500-3000r/min.
8. The method for processing the sealing surface of the molded air valve according to claim 1, wherein in the step S6, the excess is removed by adding a rounding corner in a programming manner when the first metal part (1) is processed, and the excess at the intersection of the square and the end surface of the first metal part (1) is manually removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311538236.6A CN117380981A (en) | 2023-11-17 | 2023-11-17 | Method for processing sealing surface of molded air valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311538236.6A CN117380981A (en) | 2023-11-17 | 2023-11-17 | Method for processing sealing surface of molded air valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117380981A true CN117380981A (en) | 2024-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311538236.6A Pending CN117380981A (en) | 2023-11-17 | 2023-11-17 | Method for processing sealing surface of molded air valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117380981A (en) |
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2023
- 2023-11-17 CN CN202311538236.6A patent/CN117380981A/en active Pending
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