CN114505651A - Grinding ring belt device and sealing conical surface machining method - Google Patents
Grinding ring belt device and sealing conical surface machining method Download PDFInfo
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- CN114505651A CN114505651A CN202111639028.6A CN202111639028A CN114505651A CN 114505651 A CN114505651 A CN 114505651A CN 202111639028 A CN202111639028 A CN 202111639028A CN 114505651 A CN114505651 A CN 114505651A
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- grinding
- valve seat
- conical surface
- shaft
- sealing
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- 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 invention discloses a grinding ring belt device and a sealing conical surface processing method, and belongs to the technical field of general manufacturing of aviation accessories. This grinding ring belting is applied to the valve seat, the valve seat includes: a conical bottom hole, a steel ball hole, a conical hole and a steel ball; the grinding ring belt device comprises: a stepped shaft configured as an increasingly concentric stepped shaft from a first end to a second end thereof; the step shaft body includes: the minimum shaft is positioned at the first end and is in clearance fit with the aperture of the bottom hole of the inner conical surface of the valve seat; and a maximum shaft connected with the minimum shaft and having a rounded end, and a grinding head connected to the first end of the minimum shaft, the grinding head being spherical. The device construction simple process, the operation is more convenient, and can stably promote processingquality.
Description
Technical Field
The invention relates to the technical field of general manufacturing of aviation accessories, in particular to a grinding ring belt device and a sealing conical surface processing method.
Background
The electromagnetic valve as the main accessory of aeroengine is installed on the upper part of the installation edge of the compressor casing of the engine with fuel oil as working medium. In the starting process of the engine, the electromagnetic valve is electrified to ensure that oil is supplied to the starting nozzle. The pressure switch opens its contacts in response to a given air pressure, thus interrupting the solenoid valve power supply circuit and closing the solenoid valve, after which it allows the pressurized air to blow the pilot nozzle and ensures that the pressurized air does not flow into the fuel system.
The electromagnetic valve adopts a steel ball conical surface hard sealing structure capable of automatically aligning, and the steel ball is in hard contact with a sealing surface on the valve seat to form sealing, so that the sealing specific pressure is higher, but the requirement on the machining precision of the valve seat is higher. In order to have better sealing effect, the cylindricity of the contact conical surface is good, the contact conical surface is in line contact as much as possible, and the grinding pressure of the steel ball on the line contact surface achieves the complete contact between the spherical surface and the line surface so as to achieve the sealing function. The conventional machining method is difficult to ensure the requirements due to the limitation of the cone angle position of the valve seat.
The improved valve of the related type, for example, the chinese utility model patent, patent No. cn201310384075.x, patent name "steel ball sealing conical surface processing method", the specific structure of this cited patent also includes similar technical solutions, specifically: the method has the advantages that holes with required depth are machined by using the drill with the conical angle of 70 degrees, so that the prior art is provided with a plurality of devices and wide in application range, and the prior art is lack of a tool and a machining method which are low in manufacturing cost, simple in construction process and more convenient and fast to operate, so that the skill requirements of operators are reduced, and the machining quality can be stably improved.
Disclosure of Invention
The invention aims to provide a grinding ring belt device and a sealing conical surface processing method, and solves the problems that tools and processing methods which are low in manufacturing cost, simple in construction process and more convenient and fast to operate are lacked in the prior art, so that the skill requirement on operators is reduced, and the processing quality can be stably improved.
In order to achieve the purpose, the invention provides the following technical scheme:
an abrasive belt device is applied to a valve seat, and the valve seat comprises: a conical bottom hole, a steel ball hole, a conical hole and a steel ball; the grinding ring belt device comprises:
a stepped shaft configured as an increasingly concentric stepped shaft from a first end to a second end thereof; the step shaft body includes:
the minimum shaft is positioned at the first end and is in clearance fit with the aperture of the bottom hole of the inner conical surface of the valve seat;
a largest shaft with end rounded corners connected to the smallest shaft,
a grinding tip connected to the minimum axis first end, the grinding tip being spherical.
Furthermore, the aperture fit clearance between the minimum shaft and the conical bottom hole is 0.01-0.03 mm.
Furthermore, the material of the grinding end is ruby oilstone.
Further, the ruby oilstone has a particle size of 1200 #.
Furthermore, the diameter of the grinding end head is increased by 0.03-0.07 mm according to the diameter of the steel ball.
The invention also provides a sealing conical surface processing method, which applies the grinding belt device as claimed in any one of the claims; and comprises the following steps:
the method comprises the following steps: drilling the valve seat through a numerical control lathe to ensure the size of a bottom hole of the conical surface;
step two: carrying out rough boring treatment on the valve seat through a numerical control lathe to obtain a steel ball hole, ensuring the angle and the roundness of a conical surface, and reserving the allowance of 0.2mm for fine boring;
step three: carrying out fine boring processing on the steel ball hole obtained in the second step through a numerical control lathe, and ensuring the angle and roundness of the conical surface and the size of a large hole;
step four: deburring the sealing position of the valve seat through a bench, and grinding the sealing chamfer and the sharp edge by using a bonding wheel and polishing abrasive paper to ensure the surface roughness Ra0.16;
step five: finely grinding a conical surface at the sealing position of the valve seat by using a bench drilling machine, dipping grinding paste by using the grinding ring belt device, and lightly grinding the conical surface for 5-10 s;
step six: the valve seat was washed with a cleaning solution and visually inspected to remove excess polishing paste.
Further, in the third step, the cutting parameters in the fine boring treatment are as follows: the rotating speed is 1100r/min, and the feeding amount is 0.01 mm.
Further, the granularity of the polishing sand paper in the fourth step is 1200 #.
Further, the grinding paste in the fifth step is W1 or W1.5 white corundum grinding paste, and the grinding speed is 100 r/min.
Further, the cleaning liquid in the sixth step is a hydrocarbon cleaning agent.
The invention has the advantages of
The invention discloses a grinding ring belt device and a sealing conical surface processing method.
Secondly, the grinding ring belt device and the method provided by the application have the technical advantages of low manufacturing cost, simple process, convenience in operation, low requirement on operator skills, stable processing quality and the like.
Finally, the grinding ring belt device and the method provided by the application can ensure that fuel oil with the pressure of 2-5 MPa is applied to an inlet for 3-5 minutes and no leakage exists at the outlet when the product is not connected; the outlet of the valve is plugged, the product is not communicated, air with the pressure of 0.1-0.3 MPa is applied to the inlet for 3-5 minutes, and the inlet is airtight.
Drawings
FIG. 1 is a cross-sectional view of a valve seat provided by the present invention;
FIG. 2 is a schematic view of a valve seat sealing structure provided by the present invention
FIG. 3 is a schematic structural diagram of an apparatus for grinding a belt according to the present invention;
fig. 4 is a schematic diagram of a lapping cone according to the present invention.
In the figure, the position of the upper end of the main shaft,
1. a step shaft body; 2. grinding the end head; 3. a valve seat;
101. a minimum axis; 102. a maximum axis;
301. a conical bottom hole; 302. steel ball holes; 303. a conical surface hole; 304. and (5) steel balls.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the present invention; for convenience of description, in the present application, "left side" is "first end", "right side" is "second end", "upper side" is "first end", and "lower side" is "second end" in the current view, so that the description is for the purpose of clearly expressing the technical solution, and should not be construed as an improper limitation to the technical solution of the present application.
As shown in fig. 1 to 4, an abrasive belt device is applied to a valve seat 3, wherein the valve seat 3 comprises: a conical bottom hole 301, a steel ball hole 302, a conical hole 303 and a steel ball 304; characterized in that, the grinding ring belting includes:
a step shaft body 1, the step shaft body 1 being configured as an increasing concentric step shaft body from a first end to a second end thereof; the step shaft body 1 includes:
a minimum shaft 101 at the first end, wherein the minimum shaft 101 is in clearance fit with the aperture of the conical bottom hole 301 in the valve seat 3; furthermore, the aperture fit clearance between the minimum shaft 101 and the conical bottom hole 301 is 0.01-0.03 mm.
A maximum shaft 102 with end rounded corners is connected to said minimum shaft 101,
a grinding tip 2, wherein the grinding tip 2 is connected to a first end of the minimum shaft 101, and the grinding tip 2 is spherical; further, the material of the grinding end 2 is ruby oilstone, and the granularity of the ruby oilstone is 1200 #; furthermore, the diameter of the grinding end head 2 is increased by 0.03-0.07 mm according to the diameter of the steel ball 304; the ruby oilstone material has a pore structure, the processing process can contain grinding paste, and the ruby oilstone has high hardness and strength, is fine and compact in structure, has a surface which is hardly abraded, and has the advantages of good elasticity, cutting force, wear resistance and the like.
A method for processing a sealing cone by using the belt device of the grinding ring belt of any one of claims 1 to 5; and comprises the following steps:
the method comprises the following steps: drilling the valve seat 3 through a numerically controlled lathe to ensure the size of the conical bottom hole 301;
step two: carrying out rough boring treatment on the valve seat 3 through a numerical control lathe to obtain a steel ball hole 302, ensuring the angle and the roundness of a conical surface, and reserving the allowance of 0.2mm for fine boring;
step three: carrying out fine boring processing on the steel ball hole 302 obtained in the step two by using a numerical control lathe, and ensuring the angle and roundness of the conical surface and the size of a large hole; further, in the step, the cutting parameters in the fine boring processing are as follows: the rotating speed is 1100r/min, and the feeding amount is 0.01 mm.
Step four: deburring the sealing position of the valve seat 3 through a bench, and grinding a sealing chamfer and a sharp edge by using a sticking wheel and polishing abrasive paper to ensure the surface roughness Ra0.16; further, the granularity of the polishing sand paper in the fourth step is 1200 #.
Step five: finely grinding a conical surface at the sealing position of the valve seat 3 by using a bench drilling machine, dipping grinding paste by using the grinding ring belt device, and lightly grinding the conical surface for 5-10 s; further, the grinding paste in the fifth step is W1 or W1.5 white corundum grinding paste, and the grinding speed is 100 r/min; specifically, the right end of the largest shaft 102 with a rounded end is a clamping portion which is matched with a chuck of a bench drill for grinding.
Step six: washing the valve seat 3 by using a cleaning solution, and visually checking to remove redundant grinding paste; further, the cleaning liquid in the sixth step is a hydrocarbon cleaning agent.
The grinding belt device and the method for processing the sealing conical surface can enable the cylindricity of the contact conical surface to be better and to be in line contact, and the grinding pressure of the steel ball 304 on the line contact surface is used for achieving the complete contact between the spherical surface and the line surface so as to achieve the sealing function; the grinding ring belt device and the method have the advantages of ingenious design, simple operation, low manufacturing cost, low requirement on operator skill, stable processing quality and strong practicability, and can ensure that fuel oil with the pressure of 2-5 MPa is applied to an inlet for 3-5 minutes when a product is not communicated, and no leakage exists at the outlet; the outlet of the valve is plugged, the product is not communicated, air with the pressure of 0.1-0.3 MPa is applied to the inlet for 3-5 minutes, and the inlet is airtight.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A grinding belt device is applied to a valve seat (3), wherein the valve seat (3) comprises: a conical bottom hole (301), a steel ball hole (302), a conical hole (303) and a steel ball (304); characterized in that, the grinding ring belting includes:
a step shaft body (1), the step shaft body (1) being configured as an increasing concentric step shaft body from a first end to a second end thereof; the step shaft body (1) includes:
the minimum shaft (101) is positioned at the first end, and the minimum shaft (101) is in clearance fit with the aperture of the inner conical surface bottom hole (301) of the valve seat (3);
a maximum shaft (102) with an end fillet connected to the minimum shaft (101),
a grinding tip (2), the grinding tip (2) is connected at the first end of the minimum shaft (101), the grinding tip (2) is spherical.
2. A belt apparatus for grinding ring according to claim 1, characterized in that the aperture fit clearance between said minimum shaft (101) and said conical bottom hole (301) is 0.01-0.03 mm.
3. A grinding belt device according to claim 2, characterized in that the grinding head (2) is made of ruby oilstone.
4. A lapping ring belt apparatus as claimed in claim 3, wherein the ruby oilstone particle size is 1200 #.
5. A belt apparatus for grinding ring according to claim 4 characterized in that said grinding head (2) is increased by 0.03-0.07 mm according to the diameter size of said steel ball (304).
6. A method for processing a sealing taper, characterized by using an abrasive belt device according to any one of claims 1 to 5; and comprises the following steps:
the method comprises the following steps: drilling the valve seat (3) through a numerically controlled lathe to ensure the size of the conical bottom hole (301);
step two: carrying out rough boring treatment on the valve seat (3) through a numerical control lathe to obtain a steel ball hole (302), ensuring the angle and the roundness of a conical surface, and reserving the allowance of 0.2mm for fine boring;
step three: carrying out fine boring processing on the steel ball hole (302) obtained in the step two by using a numerical control lathe, and ensuring the angle, the roundness and the size of a large hole of the conical surface;
step four: deburring the sealing position of the valve seat (3) through a bench, and grinding a sealing chamfer and a sharp edge by using a sticking wheel and polishing abrasive paper to ensure the surface roughness Ra0.16;
step five: finely grinding a conical surface at the sealing position of the valve seat (3) by a bench drilling machine, dipping grinding paste by using the grinding ring belt device, and lightly grinding the conical surface for 5-10 s;
step six: the shutter seat (3) is washed with a cleaning liquid, and excess polishing paste is removed by visual inspection.
7. The method for machining the sealing conical surface according to claim 6, wherein the cutting parameters in the fine boring treatment in the third step are as follows: the rotating speed is 1100r/min, and the feeding amount is 0.01 mm.
8. The method of claim 7, wherein the grit of the polishing sandpaper in the fourth step is 1200 #.
9. The method for processing the sealing conical surface according to claim 8, wherein the grinding paste in the step five is W1 or W1.5 white corundum grinding paste, and the grinding speed is 100 r/min.
10. The method for processing a sealing bevel of claim 8, wherein the cleaning fluid in the sixth step is a hydrocarbon cleaning fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111639028.6A CN114505651A (en) | 2021-12-29 | 2021-12-29 | Grinding ring belt device and sealing conical surface machining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111639028.6A CN114505651A (en) | 2021-12-29 | 2021-12-29 | Grinding ring belt device and sealing conical surface machining method |
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| Publication Number | Publication Date |
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| CN114505651A true CN114505651A (en) | 2022-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111639028.6A Pending CN114505651A (en) | 2021-12-29 | 2021-12-29 | Grinding ring belt device and sealing conical surface machining method |
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Citations (8)
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| JP2012200823A (en) * | 2011-03-25 | 2012-10-22 | Denso Corp | Method and device for machining metal seal part |
| CN103406734A (en) * | 2013-08-22 | 2013-11-27 | 龙工（上海）精工液压有限公司 | Machining method of valve seat of relief valve |
| CN106737123A (en) * | 2016-11-25 | 2017-05-31 | 中航动力股份有限公司 | A kind of aero-engine exterior line conical surface seal grinds prosthetic device and method |
| CN109732274A (en) * | 2018-11-16 | 2019-05-10 | 中国航发西安动力控制科技有限公司 | The processing method of bushing aperture sealing edge with hard brittleness film layer |
| CN211711115U (en) * | 2019-11-22 | 2020-10-20 | 上海航翼高新技术发展研究院有限公司 | Repairing tool for fluoroplastic valve port of airplane pressure reducer component |
| CN112923078A (en) * | 2021-01-20 | 2021-06-08 | 湖北三江航天红峰控制有限公司 | Precision assembling and grinding method for all-metal electromagnetic valve seat |
| CN113510537A (en) * | 2021-04-02 | 2021-10-19 | 重庆兆宏科技有限公司 | Grinding method and grinding device for high-precision sapphire valve seat ball groove |
| CN113664463A (en) * | 2021-07-28 | 2021-11-19 | 西安航天发动机有限公司 | Numerical control track processing method for valve deep cavity R-shaped valve seat molded surface |
-
2021
- 2021-12-29 CN CN202111639028.6A patent/CN114505651A/en active Pending
Patent Citations (8)
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|---|---|---|---|---|
| JP2012200823A (en) * | 2011-03-25 | 2012-10-22 | Denso Corp | Method and device for machining metal seal part |
| CN103406734A (en) * | 2013-08-22 | 2013-11-27 | 龙工（上海）精工液压有限公司 | Machining method of valve seat of relief valve |
| CN106737123A (en) * | 2016-11-25 | 2017-05-31 | 中航动力股份有限公司 | A kind of aero-engine exterior line conical surface seal grinds prosthetic device and method |
| CN109732274A (en) * | 2018-11-16 | 2019-05-10 | 中国航发西安动力控制科技有限公司 | The processing method of bushing aperture sealing edge with hard brittleness film layer |
| CN211711115U (en) * | 2019-11-22 | 2020-10-20 | 上海航翼高新技术发展研究院有限公司 | Repairing tool for fluoroplastic valve port of airplane pressure reducer component |
| CN112923078A (en) * | 2021-01-20 | 2021-06-08 | 湖北三江航天红峰控制有限公司 | Precision assembling and grinding method for all-metal electromagnetic valve seat |
| CN113510537A (en) * | 2021-04-02 | 2021-10-19 | 重庆兆宏科技有限公司 | Grinding method and grinding device for high-precision sapphire valve seat ball groove |
| CN113664463A (en) * | 2021-07-28 | 2021-11-19 | 西安航天发动机有限公司 | Numerical control track processing method for valve deep cavity R-shaped valve seat molded surface |
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| 刘庆华，李楠: "活门球偶件加工工艺方法探讨" * |
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