Mounting edge clamp and mounting edge machining method

Abstract

The present application relates to the technical field of engine composite material outer casing machining, in particular to a mounting edge clamp and a mounting edge machining method. The clamp comprises an upper pressing plate, a lower pressing plate, a reference module, an outer frame and an inner frame. The clamping ends of the upper pressing plate and the lower pressing plate are used for clamping a mounting plate. One side of the lower pressing plate (2) contacting the mounting edge is on the same plane as the reference surface of the reference module (3). The reference surface of the reference module is the mounting edge reference surface. The lower pressing plate and the reference module are separately arranged. A tool travel groove is formed between the lower pressing plate and the reference module. The upper pressing plate and the lower pressing plate are connected through a fixing member. The mounting edge is clamped and fixed first, and the deformation of the mounting edge is eliminated. The upper pressing plate is directly connected and fixed with the lower pressing plate, so that the mounting edge is stably clamped. The lower pressing plate and the reference module have a tool travel groove, which provides sufficient space for punching and edge cutting operations.

Description

Technical Field

[0001] This invention relates to the field of machining technology for composite material outer casings of engines, and in particular to a mounting edge fixture and a mounting edge machining method. Background Technology

[0002] Composite materials, especially carbon fiber composites, have demonstrated broad application prospects in various fields since their advent due to their low density, high strength, high modulus, and corrosion resistance. In the field of aero-engines, carbon fiber composites are widely used as the main load-bearing structural material, significantly reducing aircraft weight, improving fuel efficiency and operational effectiveness. Engines manufactured using polyimide composites, compared to titanium alloy casings, achieve lightweight engine structures, improve overall performance, and save machining costs, representing a future development trend with ever-increasing demand.

[0003] After molding, the composite material casing of the engine is a blank and cannot be directly assembled and connected to other engine components. In order to reduce engine weight and improve overall performance, the composite material casing preferentially adopts a full composite material flanged structure. The protruding part obtained by flanged is the mounting edge. The unprocessed mounting edge needs to be machined to obtain the plane and bolt holes that can be matched with other engine components. However, the unprocessed mounting edge has a certain degree of deformation. If the deformed mounting edge is directly milled, drilled, or trimmed, it will cause the carbon fiber that makes up the mounting edge to break, ultimately making the entire casing a scrap part. Summary of the Invention

[0004] The purpose of this invention is to provide a mounting edge clamp to solve the problems existing in the prior art. First, the unprocessed mounting edge is clamped and fixed to eliminate deformation on the mounting edge. The upper pressure plate is directly connected and fixed to the lower pressure plate to achieve stable clamping of the mounting edge. There is a tool groove between the lower pressure plate and the reference module, which provides sufficient space for drilling, cutting and other operations.

[0005] The technical solution of this invention is as follows: A mounting edge fixture includes an upper pressure plate 1 and a lower pressure plate 2 for clamping the mounting edge, a reference module 3, an outer frame 10, and an inner frame 11 for positioning the machining area of ​​the mounting edge; the reference module 3 is fixedly installed on the inner edge of the outer frame 10, and the lower pressure plate 2 is fixedly installed on the inner edge of the outer frame 10. The lower pressure plate 2 and the reference module 3 are separated, and a tool groove 4 is formed between the clamping end of the lower pressure plate 2 and the reference module 3; the inner frame 11 presses the product inside the outer frame 10, and the product mounting edge is placed on the plane formed by the reference module 3 and the lower pressure plate 2. The upper pressure plate 1 fixes the product mounting edge to the lower pressure plate 2 with bolts.

[0006] Furthermore, the side of the reference module 3 that contacts the mounting edge is reference surface A, with a flatness of ≤0.05mm.

[0007] Furthermore, the clamping ends of the upper pressure plate 1 and the lower pressure plate 2 are used to clamp the product mounting edge.

[0008] Furthermore, the side of the lower pressure plate 2 that contacts the mounting edge is on the same plane as the reference surface of the reference module 3.

[0009] Furthermore, the upper pressure plate 1 is provided with an upper through hole 5 for fixing bolts to pass through, and the lower pressure plate 2 is provided with a lower fixing hole 6 for installing fixing bolts. The upper through hole 5 and the lower fixing hole 6 are provided correspondingly.

[0010] Furthermore, the adjusting end of the upper pressure plate 1 is provided with an elastic adjusting member 7 for adjusting the distance between the upper pressure plate 1 and the lower pressure plate 2.

[0011] Furthermore, the elastic adjustment element 7 is a compression spring with a wire diameter of 2.0 mm.

[0012] Furthermore, the upper through hole 5 is an elongated groove, and the lower fixing hole 6 is a threaded hole.

[0013] Furthermore, a support member 8 for positioning the mounting edge is provided in the tool groove 4.

[0014] Furthermore, the upper surface of the reference module 3 is provided with a plurality of countersunk holes 9.

[0015] A method for machining the mounting edge, using the aforementioned mounting edge fixture, includes the following steps:

[0016] S1. Place the mounting edge on the reference module 3, so that the mounting edge contacts the reference surface;

[0017] S2. Set the upper pressure plate 1 until the pressing end of the upper pressure plate 1 and the clamping mounting edge of the reference module 3 are clamped together;

[0018] S3. Move the upper pressure plate 1 until the clamping end of the upper pressure plate 1 is aligned with the clamping end of the lower pressure plate 2, then fix the upper pressure plate 1. During the movement, keep the upper pressure plate 1 pressing against the installation edge.

[0019] S4. Process the mounting edge.

[0020] Furthermore, in step S2, after the upper pressure plate 1 presses the mounting edge, a feeler gauge is used to detect the gap between the mounting edge and the reference surface. When the gap distance is greater than 0.1 mm, the mounting edge is continued to be clamped until the gap distance between the upper pressure plate 1 and the mounting plate is no greater than 0.1 mm.

[0021] Furthermore, in step S3, after the upper pressure plate 1 is fixed, a feeler gauge is used to check the gap between the mounting edge and the reference surface. When the gap is greater than 0.1 mm, the mounting edge is clamped until the gap between the upper pressure plate 1 and the mounting plate is no greater than 0.1 mm.

[0022] Furthermore, in step S4, the processing of the mounting edge includes milling, drilling, and trimming.

[0023] Compared with the prior art, the present invention also achieves the following technical effects:

[0024] 1. In this invention, the adjusting end of the upper pressure plate is provided with an elastic adjusting member. The elastic adjusting member can retract. When the thickness of the mounting edge to be clamped is less than the original distance between the upper pressure plate and the lower pressure plate, pressing the elastic adjusting member downward can change the distance between the upper pressure plate and the lower pressure plate. There is no need to replace the upper pressure plate with other specifications, which can save operation steps and operation time.

[0025] 2. In this invention, the upper through hole is a slot-shaped through hole, and each upper through hole can correspond to multiple lower fixing holes at the same time, which reduces the installation accuracy of the upper pressure plate. The upper through hole and the lower fixing hole do not need to correspond one-to-one to install fixing bolts, making it more convenient to fix the upper pressure plate and the lower pressure plate.

[0026] 3. In this invention, a support member is provided in the tool groove to provide support for the processing area of ​​the mounting edge without affecting the cutting edge, and to prevent the mounting edge from deforming due to the force applied by the tool to the mounting edge during the processing.

[0027] 4. In this invention, the reference module is provided with a countersunk hole. When drilling a hole in the mounting plate above the reference module, the milling cutter or drill bit is aligned with the countersunk hole to drill. After forming a through hole, the front end of the milling cutter or drill bit enters the countersunk hole to avoid tool collision.

[0028] 5. In this invention, when the upper pressure plate clamps the mounting plate for the first time and when the upper pressure plate is installed, it is necessary to measure the gap between the upper pressure plate and the mounting plate to control the gap between the upper pressure plate and the mounting plate to not exceed the specified range, so as to avoid the mounting plate still having deformation after clamping, which would cause damage during machining. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a mounting edge clamp according to an embodiment of the present invention;

[0031] Figure 2 This is a top view schematic diagram of a mounting edge clamp according to an embodiment of the present invention;

[0032] Figure 3 This is a side view of a mounting edge clamp according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure of an upper pressure plate in an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the structure of a lower pressure plate in an embodiment of the present invention;

[0035] Figure 6 This is a side view of a mounting edge clamp with an elastic adjustment element according to an embodiment of the present invention;

[0036] Figure 7 This is a side view of a mounting edge clamp with a support member according to an embodiment of the present invention;

[0037] Figure 8 This is a schematic diagram of the structure of a casing clamp according to an embodiment of the present invention.

[0038] The components are: 1. Upper pressure plate; 2. Lower pressure plate; 3. Reference module; 4. Tool groove; 5. Upper through hole; 6. Lower fixing hole; 7. Elastic adjustment component; 8. Support component; 9. Countersunk hole; 10. Outer frame; 11. Inner frame. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] like Figures 1-8As shown, the present invention provides a mounting edge fixture, including an upper pressure plate 1 and a lower pressure plate 2 for clamping the mounting edge, and a reference module 3, an outer frame 10, and an inner frame 11 for positioning the machining area of ​​the mounting edge; the reference module 3 is fixedly installed on the inner edge of the outer frame 10, and the lower pressure plate 2 is fixedly installed on the inner edge of the outer frame 10. The lower pressure plate 2 and the reference module 3 are separated, and a tool groove 4 is formed between the clamping end of the lower pressure plate 2 and the reference module 3; the inner frame 11 presses the product inside the outer frame 10, and the product mounting edge is placed on the plane formed by the reference module 3 and the lower pressure plate 2. The upper pressure plate 1 fixes the product mounting edge to the lower pressure plate 2 with bolts. The side of the reference module 3 that contacts the mounting edge is the reference surface a, and the flatness is ≤0.05mm.

[0042] The clamping end of the upper pressure plate 1 and the clamping end of the lower pressure plate 2 are used to clamp the product mounting edge. The side of the lower pressure plate 2 that contacts the mounting edge is on the same plane as the reference surface of the reference module 3, so that the clamped mounting edge remains flat and will not bend or fold. After the clamping is released, the mounting edge will not shrink back or develop irreversible creases.

[0043] The upper pressure plate 1 is provided with an upper through hole 5 for fixing bolts to pass through, and the lower pressure plate 2 is provided with a lower fixing hole 6 for installing fixing bolts. The upper through hole 5 and the lower fixing hole 6 are provided correspondingly.

[0044] The upper pressure plate 1 and the lower pressure plate 2, as well as the reference module 3, are in multiple sets, which facilitates disassembly and maintenance, and their shapes are set according to the product shape.

[0045] like Figure 6 As shown, further, the adjusting end of the upper pressure plate 1 is provided with an elastic adjusting member 7 for adjusting the distance between the upper pressure plate 1 and the lower pressure plate 2; the elastic adjusting member 7 is a compression spring with a wire diameter of 2.0mm, and the rest are selected according to the size of the upper pressure plate.

[0046] The elastic adjustment element 7 can retract. When the thickness of the mounting edge to be clamped is less than the original distance between the upper pressure plate and the lower pressure plate, pressing the elastic adjustment element 7 downward can change the distance between the upper pressure plate 1 and the lower pressure plate 2. The mounting edge can be clamped without replacing the upper pressure plate 1 with other specifications.

[0047] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the upper through hole 5 is an elongated slot, and the lower fixing hole 6 is a threaded hole. Each upper through hole 5 can correspond to multiple lower fixing holes 6 simultaneously, reducing the installation accuracy of the upper pressure plate 1. The upper through holes 5 and the lower fixing holes 6 do not need to correspond one-to-one to install fixing bolts. In a preferred embodiment, each upper pressure plate 1 has two upper through holes 5, and each lower pressure plate 2 is provided with two rows of lower fixing holes 6, with each row including four lower fixing holes 6.

[0048] like Figure 7 As shown, a support member 8 is provided within the tool groove 4 to support the mounting edge. The support member 8 provides support for the machining area of ​​the mounting edge, preventing deformation of the mounting edge due to the force exerted by the tool on the mounting edge during machining. In a preferred embodiment, the upper part of the support member 8 is a support head, and the lower part is an elastic member. The clamped mounting edge will press down on the support head, and the elastic member will contract and provide support force. The support head is provided with a groove for tool clearance. When milling, drilling, or cutting, the tool passes through the mounting edge and enters the groove, without colliding with the tool or damaging the support head. The support member 8 can also be other structures that can retract and provide support force.

[0049] like Figure 1 As shown, the upper surface of the reference module 3 is provided with multiple countersunk holes 9. When drilling holes in the mounting plate above the reference module 3, the milling cutter or drill bit is aligned with the countersunk holes 9 to drill. After forming a through hole, the front end of the milling cutter or drill bit enters the countersunk hole 9 to avoid collision.

[0050] like Figure 8 As shown, in a preferred embodiment, the inner frame 11 is provided with a cushioning layer to protect the main body of the casing. Lifting rings are provided on the outer frame 10 and the inner frame 11, and the outer frame 10 is also provided with a connecting rod for handling.

[0051] The present invention also provides a method for machining the mounting edge, based on the above-mentioned mounting edge fixture, comprising the following steps:

[0052] S1. Place the mounting edge on the reference module 3, so that the mounting edge contacts the reference surface;

[0053] S2. Set the upper pressure plate 1 until the clamping end of the upper pressure plate 1 and the mounting edge of the reference module 3 are clamped. After the upper pressure plate 1 clamps the mounting edge, use a feeler gauge to check the gap between the mounting plate and the reference surface. When the gap is greater than 0.1 mm, continue to clamp the mounting edge until the gap between the upper pressure plate 1 and the mounting plate is not greater than 0.1 mm.

[0054] S3. Move the upper pressure plate 1 until the clamping end of the upper pressure plate 1 is aligned with the clamping end of the lower pressure plate 2, and then fix the upper pressure plate 1. During the movement, keep the upper pressure plate 1 pressing against the mounting edge. After the upper pressure plate 1 is fixed, use a feeler gauge to check the gap between the mounting plate and the reference surface. When the gap is greater than 0.1 mm, continue to clamp the mounting edge until the gap between the upper pressure plate 1 and the mounting plate is not greater than 0.1 mm.

[0055] S4. Process the mounting edge. The processing of the mounting edge includes milling, drilling and trimming. First, mill the mounting edge to flatten the machined surface. Then, according to the parts that will be matched with the mounting edge later, make holes on the mounting edge for the fasteners to pass through. Finally, cut off the excess part to complete the processing of the mounting edge.

[0056] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A mounting edge clamp, characterized in that: It includes an upper pressure plate (1) and a lower pressure plate (2) for clamping the mounting edge, and a reference module (3), an outer frame (10), and an inner frame (11) for positioning the machining area of ​​the mounting edge; the reference module (3) is fixedly installed on the inner edge of the outer frame (10), and the lower pressure plate (2) is fixedly installed on the inner edge of the outer frame (10). The lower pressure plate (2) and the reference module (3) are separated. A tool groove (4) is formed between the clamping end of the lower pressure plate (2) and the reference module (3); the inner frame (11) presses the product inside the outer frame (10), and the product mounting edge is placed on the plane formed by the reference module (3) and the lower pressure plate (2). The upper pressure plate (1) fixes the product mounting edge to the lower pressure plate (2) with bolts.

2. The mounting edge clamp according to claim 1, characterized in that: The surface of the reference module (3) that contacts the mounting edge is reference surface a, and its flatness is ≤0.05mm.

3. The mounting edge clamp according to claim 1, characterized in that: The clamping end of the upper pressure plate (1) and the clamping end of the lower pressure plate (2) are used to clamp the product mounting edge.

4. The mounting edge clamp according to claim 1, characterized in that: The side of the lower pressure plate (2) that contacts the mounting edge is on the same plane as the reference surface of the reference module (3).

5. The mounting edge clamp according to claim 1, characterized in that: The upper pressure plate (1) and the lower pressure plate (2) are connected by a fastener. The upper pressure plate (1) is provided with an upper through hole (5) for fixing bolts to pass through, and the lower pressure plate (2) is provided with a lower fixing hole (6) for installing fixing bolts. The upper through hole (5) and the lower fixing hole (6) are provided correspondingly.

6. The mounting edge clamp according to claim 1, characterized in that: According to claim 1, the mounting edge clamp is characterized in that: the adjusting end of the upper pressure plate (1) is provided with an elastic adjusting member (7) for adjusting the distance between the upper pressure plate (1) and the lower pressure plate (2).

7. The mounting edge clamp according to claim 1, characterized in that: The elastic adjustment element (7) is made of a compression spring with a wire diameter of 2.0 mm.

8. The mounting edge clamp according to claim 1, characterized in that: The upper through hole (5) is a long groove, and the lower fixing hole (6) is a threaded hole.

9. The mounting edge clamp according to claim 1, characterized in that: The tool groove (4) is provided with a support member (8) for positioning the installation edge.

10. The mounting edge clamp according to claim 1, characterized in that: The upper surface of the reference module (3) is provided with multiple countersunk holes (9) for tool avoidance during drilling.

11. A method for processing the installation edge, characterized in that: The processing method using the mounting edge clamp according to any one of claims 1-10 includes the following steps: S1. Place the mounting edge on the reference module (3) so that the mounting edge contacts the reference surface; S2. Set the upper pressure plate (1) until the pressing end of the upper pressure plate (1) and the mounting edge of the reference module (3) are clamped together; S3. Move the upper pressure plate (1) until the clamping end of the upper pressure plate (1) is aligned with the clamping end of the lower pressure plate (2), then fix the upper pressure plate (1) and keep the upper pressure plate (1) pressing the mounting edge during the movement. S4. Process the mounting edge.

12. The installation edge processing method according to claim 11, characterized in that: In step S2, after the upper pressure plate (1) presses the mounting edge, a feeler gauge is used to check the gap between the mounting edge and the reference surface. When the gap distance is greater than 0.1 mm, the mounting edge is continued to be clamped until the gap distance between the upper pressure plate (1) and the mounting plate is not greater than 0.1 mm.

13. The installation edge processing method according to claim 11, characterized in that: In step S3, after the upper pressure plate (1) is fixed, a feeler gauge is used to check the gap between the mounting edge and the reference surface. When the gap is greater than 0.1 mm, the mounting edge is clamped until the gap between the upper pressure plate (1) and the mounting plate is not greater than 0.1 mm.

14. The installation edge processing method according to claim 11, characterized in that: In step S4, the processing of the mounting edge includes milling, drilling, and trimming.

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