Positioning and machining clamp for engine nozzle part

Abstract

The utility model discloses an engine nozzle part positioning and machining clamp which is suitable for a nozzle and comprises a main body, the upper end of the main body is located in a nozzle opening of the nozzle, the top of the main body is provided with an upper limiting part, the main body is sleeved with a lower limiting part in a sliding mode, the lower limiting part and the upper limiting part clamp the nozzle, and the middle of the main body is provided with a thread part. According to the engine nozzle part positioning and machining clamp, the upper surface, the bottom face and the side face of an engine nozzle part can be machined through a lathe or a machining center through one-time clamping, the machining efficiency is improved, the machining cost is reduced, and the machining efficiency is improved. According to the clamp, the engine nozzle part can be efficiently machined, the clamp is suitable for the engine nozzle part and can also adapt to clamping of other similar parts with center holes, and the universality is good.

Description

Technical Field

[0001] The utility model relates to the technical field of engine nozzle processing, in particular to a positioning processing fixture for engine nozzle parts. Background Art

[0002] The fuel nozzle is one of the key components of the engine. It is a special nozzle for atomizing fuel and can produce hollow and solid spray shapes.

[0003] Our company previously published an invention patent for an assembly method for an aircraft engine fuel nozzle, with the announcement number CN114576652 A. The patent discloses a nozzle structure with a nozzle at the center and a conical concave upper surface. When using a conventional fixture to process the nozzle, multiple clampings are required to process the upper, bottom, and side surfaces of the nozzle, resulting in low processing efficiency. To this end, our company has developed a new type of fixture to achieve high-efficiency processing of this type of part. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide an engine nozzle part positioning processing fixture to achieve high-efficiency processing of the engine nozzle part, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a positioning and processing fixture for engine nozzle parts, which is suitable for the nozzle and includes a main body, the upper end of the main body is located in the nozzle orifice of the nozzle, an upper limit portion is provided on the top of the main body, a lower limit portion is slidably mounted on the main body, the lower limit portion and the upper limit portion clamp the nozzle, a threaded portion is provided in the middle of the main body, the threaded portion is equipped with a tightening nut, the tightening nut tightens the lower limit portion, and a mounting block is detachably installed on the bottom of the main body.

[0006] As a preferred technical solution of the present invention, the hardness of the upper limit portion and the lower limit portion is higher than the hardness of the nozzle.

[0007] As an optimal technical solution of the present invention, the upper limit portion is a cone with a larger upper portion and a smaller lower portion, and the lower limit portion is a cone with a smaller upper portion and a larger lower portion. When clamping the nozzle, the bottom of the upper limit portion is located in the nozzle, and the top of the lower limit portion is located in the nozzle.

[0008] As an optimal technical solution of the present invention, a connecting portion is provided at the bottom of the main body, a connecting hole is provided on the mounting block, the connecting portion is located in the connecting hole and is connected by a screw passing through a transverse tightening hole, and a mounting hole for connecting to a machine tool processing platform is provided on the mounting block.

[0009] As a preferred technical solution of the present invention, the cross-sections of the connecting portion and the connecting hole are both rectangular.

[0010] As a preferred technical solution of the present invention, the main body is cylindrical.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the engine nozzle parts positioning and processing fixture can be clamped once to process the upper surface, bottom surface and side surface of the engine nozzle parts through a lathe or machining center, thereby achieving high-efficiency processing of the engine nozzle parts. The fixture is not only suitable for the engine nozzle parts, but can also adapt to the clamping of other similar parts with center holes, and has good versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model.

[0014] In the figure: 1 nozzle, 2 upper limit part, 3 lower limit part, 4 main body, 5 tightening nut, 6 threaded part, 7 connecting part, 8 mounting block, 9 connecting hole, 10 mounting hole, 11 tightening hole. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] See also Figure 1-2The utility model provides a technical solution: a fixture for positioning and processing engine nozzle parts, which is suitable for the nozzle 1 and includes a main body 4. The upper end of the main body 4 is located in the nozzle of the nozzle 1, and an upper limit portion 2 is provided on the top of the main body 4. A lower limit portion 3 is slidably sleeved on the main body 4, and the lower limit portion 3 and the upper limit portion 2 clamp the nozzle 1. The upper limit portion 2 is a cone with a larger upper portion and a smaller lower portion, and the lower limit portion 3 is a cone with a smaller upper portion and a larger lower portion. When clamping the nozzle 1, the bottom of the upper limit portion 2 is located in the nozzle, and the top of the lower limit portion 3 is located in the nozzle, so the fixture does not contact the upper surface, bottom surface, and side surface of the nozzle 1, so that the purpose of processing the upper surface, bottom surface, and side surface of the nozzle 1 by clamping once is achieved, thereby improving the processing efficiency. During the processing, the surface of the part close to the nozzle can be No processing is performed because this range is the processing allowance reserved for nozzle hole expansion. The hardness of the upper limit part 2 and the lower limit part 3 is higher than that of the nozzle 1, so that a longer service life of the fixture is achieved. In order to avoid relative rotation of the nozzle 1 during processing, the nozzle of the nozzle 1 is left to be processed last. This can increase the clamping force of the lower limit part 3 and the upper limit part 2 on the nozzle 1, allowing the edge of the nozzle to deform appropriately, but not exceeding the processing allowance reserved for the nozzle. The relative rotation of the nozzle 1 can also be avoided by reducing the cutting amount. A threaded part 6 is provided in the middle of the main body 4, and the threaded part 6 is equipped with a tightening nut 5. The tightening nut 5 tightens the lower limit part 3. Since the mounting block 8 needs to be removed when clamping or removing the nozzle 1, the mounting block 8 is detachably mounted on the bottom of the main body 4;

[0017] The main body 4 is cylindrical so that the top, bottom and side surfaces can be machined on a conventional lathe after the nozzle 1 is clamped. A connecting portion 7 is provided at the bottom of the main body 4, and a connecting hole 9 is provided on the mounting block 8. The connecting portion 7 is located in the connecting hole 9 and is connected by screws passing through a transverse tightening hole 11. The cross-sections of the connecting portion 7 and the connecting hole 9 are both rectangular, which reduces the torsional load of the connecting screws. The mounting block 8 is provided with a mounting hole 10 for connecting to a machine tool processing platform.

[0018] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fixture for positioning and processing engine nozzle parts, characterized by: The clamp is suitable for a nozzle (1), comprising a main body (4), the upper end of the main body (4) being located in the nozzle of the nozzle (1), an upper limit portion (2) being provided at the top of the main body (4), a lower limit portion (3) being slidably sleeved on the main body (4), the lower limit portion (3) and the upper limit portion (2) clamping the nozzle (1), a threaded portion (6) being provided at the middle of the main body (4), the threaded portion (6) being equipped with a tightening nut (5), the tightening nut (5) tightening the lower limit portion (3), and a mounting block (8) being detachably mounted at the bottom of the main body (4).

2. The engine nozzle parts positioning and processing fixture according to claim 1, characterized in that: The hardness of the upper limit portion (2) and the lower limit portion (3) is higher than the hardness of the nozzle (1).

3. The engine nozzle parts positioning and processing fixture according to claim 1, characterized in that: The upper limit portion (2) is in the shape of a cone with a larger upper portion and a smaller lower portion, and the lower limit portion (3) is in the shape of a cone with a smaller upper portion and a larger lower portion. When the nozzle (1) is clamped, the bottom of the upper limit portion (2) is located in the nozzle, and the top of the lower limit portion (3) is located in the nozzle.

4. The engine nozzle parts positioning and processing fixture according to claim 1, characterized in that: The bottom of the main body (4) is provided with a connecting portion (7), a connecting hole (9) is provided on the mounting block (8), the connecting portion (7) is located in the connecting hole (9) and is connected by screws passing through transverse tightening holes (11), and the mounting block (8) is provided with a mounting hole (10) for connecting to a machine tool processing platform.

5. The engine nozzle parts positioning and processing fixture according to claim 4, characterized in that: The cross sections of the connecting portion (7) and the connecting hole (9) are both rectangular.

6. The engine nozzle parts positioning and processing fixture according to claim 1, characterized in that: The main body (4) is cylindrical.

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