Aircraft accessory valve outer circle grinding tool

Abstract

The utility model relates to an aircraft accessory valve outer circle grinding tool, and relates to the field of aircraft part machining, the aircraft accessory valve outer circle grinding tool comprises a clamping sleeve, and a fixing hole used for fixing a valve part is coaxially formed in one end of the clamping sleeve; a shrinkage groove is formed in the side wall of the grinding sleeve in the radial direction in a penetrating mode, and the inner wall of the grinding sleeve is used for grinding the outer circle of the valve part; the tightening sleeve is coaxially arranged on the grinding sleeve in a sleeving mode, a plurality of deformation grooves are formed in the outer wall of the tightening sleeve in the circumferential direction, an adjusting groove is formed in the outer wall of the tightening sleeve in the radial direction in a penetrating mode, a threaded hole and a counterbore are formed in the positions, on the two sides of the adjusting groove, of the tightening sleeve in a penetrating mode correspondingly, and a tightening bolt is arranged on the tightening sleeve. A bolt head of the tightening bolt is located in the counterbore, and one end of a screw rod of the tightening bolt is connected into the threaded hole in a threaded mode. The valve part grinding device has the advantages that the valve part grinding cost can be reduced, and the grinding efficiency can be improved.

Description

Technical Field

[0001] This application relates to the field of aircraft part processing, and particularly to an outer circle grinding tooling for aircraft accessory valves. Background Art

[0002] In the valve components of an aircraft hydraulic system, as the core components controlling the on-off of the hydraulic circuit, their working interfaces do not rely on traditional sealing devices, but directly rely on the close contact between their outer circle metal surfaces and mating parts to achieve sealing. Therefore, the outer diameter size and surface roughness of the valves need to reach extremely high precision standards, which exceed the scope of the current simple machine tool processing capabilities.

[0003] To meet this stringent requirement, the industry generally uses the method of manual grinding for processing. The specific process is as follows:

[0004] 1. During preliminary processing, a certain thickness of allowance is deliberately left on the outer circle surface of the valve to reserve space for subsequent fine grinding.

[0005] 2. Prepare a series of grinding sleeves, made of gray iron, whose unique organizational structure is both wear-resistant and has good grinding paste adsorption capacity. These grinding sleeves are arranged in descending order of inner hole size to adapt to the decreasing demand of the valve outer circle during the grinding process.

[0006] 3. The grinding process starts with the grinding sleeve with the largest inner hole. Apply an appropriate amount of grinding paste in the inner hole and grind the outer circle of the valve by rotating and pressing. As the grinding progresses, the inner hole of the grinding sleeve gradually wears, and at this time, replace it with a grinding sleeve with a smaller inner hole size and continue grinding until the size and surface roughness of the valve outer circle fully meet the design requirements.

[0007] However, this traditional grinding process has significant drawbacks: the manufacturing of each valve part consumes a large number of grinding sleeves, resulting in high production costs, and the grinding process takes a long time, seriously affecting production efficiency. Summary of the Invention

[0008] In order to improve the problems of high cost and low efficiency existing in the grinding of valves, this application provides an outer circle grinding tooling for aircraft accessory valves.

[0009] The outer circle grinding tooling for aircraft accessory valves provided by this application adopts the following technical solutions:

[0010] An outer circle grinding tooling for aircraft accessory valves, comprising:

[0011] A clamping sleeve, with a fixing hole coaxially opened at one end for fixing the valve part;

[0012] A grinding sleeve, a shrinkage groove is radially penetrated through the side wall of the grinding sleeve, and the inner wall of the grinding sleeve is used for grinding the outer circle of the valve part;

[0013] A tightening sleeve, the tightening sleeve is coaxially sleeved on the grinding sleeve, a plurality of deformation grooves are circumferentially formed on the outer wall of the tightening sleeve, an adjustment groove is radially penetrated through the outer wall of the tightening sleeve, threaded holes and counterbore holes are respectively penetrated through on both sides of the tightening sleeve at the adjustment groove, a tightening bolt is arranged on the tightening sleeve, the bolt head of the tightening bolt is located in the counterbore hole, and one end of the screw rod of the tightening bolt is threadedly connected in the threaded hole.

[0014] Optionally, a plurality of annular gaskets are integrally and fixedly arranged on the outer wall of the grinding sleeve at intervals along the axial direction.

[0015] Optionally, a set screw for fixing the valve part is threadedly connected to the clamping sleeve, and the end of the set screw extends into the fixing hole of the clamping sleeve.

[0016] Optionally, a plurality of tightening bolts are provided, and the plurality of tightening bolts are evenly distributed at intervals along the axial direction of the tightening sleeve.

[0017] Optionally, a crack prevention hole is formed at one end of the deformation groove close to the center of the tightening sleeve, and the crack prevention hole is axially penetrated through the tightening sleeve and communicated with the deformation groove.

[0018] Optionally, an internal hexagonal hole is formed on the bolt head of the tightening bolt.

[0019] In summary, the present application includes at least one of the following beneficial technical effects:

[0020] 1. In the present application, the inner hole size of the grinding sleeve is adjusted by the tightening sleeve. During the process of grinding the valve part, when a gap is generated between the grinding sleeve and the valve part due to friction, and the outer circle size and outer circle roughness of the valve part have not been ground in place, the tightening sleeve is tightened with the tightening bolt until the inner hole of the grinding sleeve reaches the required size, and then grinding can be continued. Through the above-mentioned grinding sleeve and tightening sleeve, it is not necessary to manufacture multiple grinding sleeves during the valve grinding process, nor is it necessary to repeatedly replace the grinding sleeve, effectively reducing the cost of valve grinding and improving the grinding efficiency. Description of the Drawings

[0021] Figure 1 is a longitudinal sectional view of an embodiment of the present application;

[0022] Figure 2 is an exploded structural view of an embodiment of the present application;

[0023] Figure 3 is a schematic connection structure diagram of the tightening sleeve and the tightening bolt of an embodiment of the present application.

[0024] Description of reference numerals: 1. Clamping sleeve; 11. Fixing hole; 12. Set screw; 2. Grinding sleeve; 21. Shrinkage groove; 22. Annular washer; 3. Tightening sleeve; 31. Deformation groove; 32. Crack prevention hole; 33. Adjustment groove; 34. Threaded hole; 35. Countersunk hole; 36. Tightening bolt; 361. Hexagonal socket hole; 4. Valve part. Detailed implementation mode

[0025] The following further elaborates on this application in conjunction with the attached drawings Figures 1-3 and makes a more detailed description of this application.

[0026] The embodiment of this application discloses an outer circle grinding tooling for the valve of an aircraft accessory. Referring to Figure 1 , an outer circle grinding tooling for the valve of an aircraft accessory includes a clamping sleeve 1, a grinding sleeve 2, and a tightening sleeve 3.

[0027] One end of the clamping sleeve 1 is coaxially provided with a fixing hole 11 for fixing the valve part 4, and a set screw 12 for fixing the valve part 4 is threadedly connected to the clamping sleeve 1. The end of the set screw 12 extends into the fixing hole 11 of the clamping sleeve 1. When fixing the valve part 4, insert one end of the valve part 4 into the fixing hole 11, and then rotate the set screw 12 to press the valve part 4 tightly.

[0028] The grinding sleeve 2 is made of gray iron. The gray iron grinding sleeve 2 is not only wear-resistant but also its surface can adsorb more grinding paste. A shrinkage groove 21 is radially penetrated through the side wall of the grinding sleeve 2. The inner wall of the grinding sleeve 2 is used for grinding the outer circle of the valve part 4. A plurality of annular washers 22 are integrally fixed along the axial direction on the outer wall of the grinding sleeve 2 at intervals. The annular washers 22 are provided to enhance the overall mechanical strength of the grinding sleeve 2.

[0029] The tightening sleeve 3 is coaxially sleeved on the grinding sleeve 2. A plurality of deformation grooves 31 are circumferentially provided on the outer wall of the tightening sleeve 3. In this embodiment, three deformation grooves 31 are provided. An adjustment groove 33 is radially penetrated through the outer wall of the tightening sleeve 3. The three deformation grooves 31 and one adjustment groove 33 in this embodiment are evenly distributed at intervals along the circumferential direction of the tightening sleeve 3.

[0030] On both sides of the adjustment groove 33 of the tightening sleeve 3, a plurality of groups of corresponding threaded holes 34 and countersunk holes 35 are respectively penetrated. In this embodiment, three groups are provided. The three groups of threaded holes 34 and countersunk holes 35 are evenly distributed at intervals along the axial direction of the tightening sleeve 3. Each group of threaded holes 34 and countersunk holes 35 is provided with a tightening bolt 36. The bolt head of the tightening bolt 36 is located in the countersunk hole 35, and one end of the screw rod of the tightening bolt 36 is threadedly connected to the threaded hole 34. An internal hexagonal hole 361 is provided on the bolt head of the tightening bolt 36.

[0031] One end of the deformation groove 31 close to the center of the tightening sleeve 3 is provided with a crack prevention hole 32. The crack prevention hole 32 is axially penetrated through the tightening sleeve 3 and communicated with the deformation groove 31. The crack prevention hole 32 is used to prevent the problem that the tightening sleeve 3 generates cracks along the bottom of the deformation groove 31 when adjusting and contracting.

[0032] The implementation principle of the outer circle grinding tooling for an aircraft accessory valve in the embodiment of the present application is as follows: When grinding the valve part 4, first install the grinding sleeve 2 into the tightening sleeve 3, and then rotate the three tightening bolts 36. When the tightening bolts 36 rotate, they drive the tightening sleeve 3 to contract, and then drive the grinding sleeve 2 in the tightening sleeve 3 to contract until the inner hole of the grinding sleeve 2 reaches the required size. Then insert one end of the valve part 4 into the fixing hole 11 of the clamping sleeve 1, and then rotate the setscrew 12 to tighten the valve part 4. Then fix the clamping sleeve 1 with the valve part 4 fixed on the three-jaw chuck of the lathe. Then inject an appropriate amount of grinding paste into the inner hole of the grinding sleeve 2, then put the grinding sleeve 2 on the valve part 4, hold the tightening sleeve 3 by hand, and start the lathe for grinding.

[0033] When there is a gap between the grinding sleeve 2 and the valve part 4 due to friction loss, and the outer circle size and outer circle roughness of the valve part 4 have not been ground in place, tighten the tightening sleeve 3 with the tightening bolt 36 until the inner hole of the grinding sleeve 2 reaches the required size, and follow this step until the valve part 4 is ground to meet the technical requirements.

[0034] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An outer circle grinding tooling for an aircraft accessory valve, characterized in that, Including: A clamping sleeve (1), one end of the clamping sleeve (1) is coaxially provided with a fixing hole (11) for fixing the valve part (4); A grinding sleeve (2), a shrinkage groove (21) is radially penetrated through the side wall of the grinding sleeve (2), and the inner wall of the grinding sleeve (2) is used for grinding the outer circle of the valve part (4); A tightening sleeve (3), the tightening sleeve (3) is coaxially sleeved on the grinding sleeve (2), a plurality of deformation grooves (31) are circumferentially arranged on the outer wall of the tightening sleeve (3), an adjusting groove (33) is radially penetrated through the outer wall of the tightening sleeve (3), threaded holes (34) and counterbore holes (35) are respectively penetrated through on both sides of the adjusting groove (33) of the tightening sleeve (3), a tightening bolt (36) is arranged on the tightening sleeve (3), the bolt head of the tightening bolt (36) is located in the counterbore hole (35), and one end of the screw rod of the tightening bolt (36) is threadedly connected in the threaded hole (34).

2. The external cylindrical grinding tooling for an aircraft accessory valve according to claim 1, wherein: A plurality of annular washers (22) which are spaced apart from each other are integrally fixed on the outer wall of the grinding sleeve (2) along the axial direction.

3. The external circle grinding tooling for an aircraft accessory valve according to claim 2, characterized in that: A set screw (12) for fixing the valve part (4) is threadedly connected to the clamping sleeve (1), and the end of the set screw (12) extends into the fixing hole (11) of the clamping sleeve (1).

4. A grinding tool for the outer circle of an aircraft accessory valve according to claim 3, characterized in that: A plurality of the tightening bolts (36) are provided, and the plurality of tightening bolts (36) are evenly spaced along the axial direction of the tightening sleeve (3).

5. A grinding tool for the outer circle of an aircraft accessory valve according to claim 4, characterized in that: A crack prevention hole (32) is opened at one end of the deformation groove (31) close to the center of the tightening sleeve (3), and the crack prevention hole (32) is axially penetrated through the tightening sleeve (3) and communicated with the deformation groove (31).

6. The external circle grinding tooling for an aircraft accessory valve according to claim 5, characterized in that: An internal hexagonal hole (361) is opened on the bolt head of the tightening bolt (36).

Images