Machining clamp for high-pressure front casing welding assembly

Abstract

The utility model relates to the technical field of machining, in particular to a machining clamp of a high-pressure front casing welding assembly, which comprises a bottom plate, a movable block, a pressing plate and a pressing block. The plurality of movable blocks are annularly and uniformly distributed on the top surface of the bottom plate; two rectangular holes are formed in each movable block; the pressing block is lapped on the movable block, a first screw is inserted into the pressing block, a screw rod of the first screw penetrates through the rectangular hole and then is screwed on the bottom plate, and the side length of the rectangular hole is larger than the outer diameter of the screw rod of the first screw; a pressing plate mounting column is arranged on the movable block; the pressing plate is mounted on the top surface of the pressing plate mounting column through a second screw; an arc-shaped boss is arranged on the top face of the movable block, and a spigot is arranged on the arc-shaped boss. Due to the fact that the radial position of the movable block can be adjusted, the installation edges at the two ends of the high-pressure front casing welding assembly can be clamped through one clamp.

Description

TECHNICAL FIELD

[0001] The utility model relates to machining technical field especially, relate to a kind of machining fixture of high-pressure front machine case welding assembly. BACKGROUND

[0002] In the field of aero-engine, the machine case is one of the important parts of the aero-engine, which is the base of the entire engine and the main load-bearing component on the aero-engine. The machine case provides installation and fixing structure for various components inside the engine, such as the rotor, blades, combustion chamber, etc., ensuring the stability and reliability of these components during flight. In addition, the machine case also has the functions of protection, cooling, improving engine efficiency, and facilitating maintenance and repair. The size of the machine case parts directly affects the quality of assembly, the reliability and safety of engine operation.

[0003] In combination Figure 1 As shown in the figure, it is a three-dimensional structure diagram of high-pressure front machine case welding assembly. The material of high-pressure front machine case welding assembly is TC4 titanium alloy, which has the advantages of small density, high specific strength, good corrosion resistance, high temperature resistance and easy welding, and can maintain stability in high temperature environment. The high-pressure front machine case welding assembly has an upper installation edge 101, a lower installation edge 102, and a boss feature. The high-pressure front machine case welding assembly needs to be processed with turning reference, turning upper end surface, turning lower end surface, milling end surface hole, milling radial hole, etc. Therefore, the clamp is needed to clamp the high-pressure front machine case welding assembly.

[0004] In combination Figure 2 , Figure 3 As shown in the figure, both ends of the high-pressure front machine case welding assembly need to be turned. When turning the upper end surface of the part, clamp and press tightly on the lower installation edge 102. When turning the lower end surface of the part, clamp and press tightly on the upper installation edge 101. Therefore, when designing the clamp, try to use a set of clamp to meet the clamping of the upper and lower installation edges of the part.

[0005] The traditional clamp structure, such as the patent application with publication number CN116460622A, discloses a change-type clamp and method for machine case parts between processes. The change-type clamp is designed with two or more positioning stop devices on the same clamp according to the actual size of the positioning circle of the large end installation edge of the machine case part. One stop on the clamp is used to clamp the small end of the part, and the other stop is used to clamp the large end of the part.

[0006] However, the above-mentioned prior art CN116460622A is suitable for clamping workpieces with large difference in diameter between two ends. For Figure 1The difference between the outer diameter of the upper mounting edge 101 and the lower mounting edge 102 of the high-pressure front casing welding assembly shown is not greater than 10 mm, two positioning stop devices cannot be simultaneously arranged on the bottom plate for clamping the upper mounting edge 101 and the lower mounting edge 102, and therefore the clamp in the prior art is not suitable for clamping the high-pressure front casing welding assembly. Content of the utility model

[0007] The main purpose of the utility model is to provide a machining clamp for a high-pressure front casing welding assembly, aiming at solving the above technical problems.

[0008] To achieve the above purpose, the utility model provides a machining clamp for a high-pressure front casing welding assembly, which comprises a bottom plate, movable blocks, a pressing plate and pressing blocks.

[0009] Preferably, a strip-shaped hole is arranged on the pressing plate, and the screw rod of the second screw is screwed into the threaded hole in the top surface of the pressing plate mounting column through the strip-shaped hole.

[0010] Preferably, one end of the pressing plate is arranged as a pressing end, and a columnar body is arranged on the bottom surface of the pressing end.

[0011] Preferably, the length of the rectangular hole is L, the outer diameter of the screw rod of the first screw is B, and the following requirement is met: L-B > C, wherein C is the difference between the outer diameters of the upper mounting edge and the lower mounting edge of the high-pressure front casing welding assembly.

[0012] Preferably, the width of the rectangular hole is D, and the following requirement is met: D > 1.5B.

[0013] Preferably, a plurality of first lightening holes are arranged in a ring shape on the bottom plate, and the first lightening holes are fan-shaped through holes.

[0014] Preferably, a second lightening hole is arranged at the center of the bottom plate, and the second lightening hole is a circular through hole.

[0015] Preferably, the utility model further comprises a machine tool platform, the bottom plate is placed on the machine tool platform, four screw through holes with a diameter of φ20 mm are arranged in a ring shape on the bottom plate, third screws are matched and arranged in the screw through holes, and the lower ends of the third screws are screwed on the machine tool platform.

[0016] With the above technical scheme, the utility model has the advantages of the following:

[0017] (1) In the utility model, the rectangular hole is arranged on the movable block, the movable block is installed on the bottom plate through the pressing block and the first screw, the screw rod of the first screw is arranged in the rectangular hole of the movable block, and the side length of the rectangular hole is greater than the outer diameter of the screw rod of the first screw. When the upper mounting edge and the lower mounting edge of the high-pressure pre-chamber welding assembly are clamped, the radial position of the movable block on the bottom plate can be adjusted by loosening the first screw, so that the stop opening on the movable block is clamped on the mounting edge.

[0018] (2) In the utility model, the radial position of the movable block can be adjusted, so that the mounting edges at the two ends of the high-pressure pre-chamber welding assembly can be clamped by using one set of clamp. The problem that two positioning stop opening devices need to be arranged in the clamp to clamp the workpieces at the two ends in the prior art is overcome. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the structures shown in the drawings without creative labor for those skilled in the art.

[0020] Figure 1 It is a schematic view of the three-dimensional structure of the high-pressure pre-chamber welding assembly.

[0021] Figure 2 It is a schematic view of the clamping and pressing position of the lower mounting edge when turning the upper end surface of the high-pressure pre-chamber welding assembly.

[0022] Figure 3 It is a schematic view of the clamping and pressing position of the upper mounting edge when turning the lower end surface of the high-pressure pre-chamber welding assembly.

[0023] Figure 4 It is a schematic view of the machining clamp provided by the utility model.

[0024] Figure 5 It is a three-dimensional structure view of the movable block in the utility model.

[0025] Figure 6 It is a top view of the movable block in the utility model.

[0026] Figure 7 It is a front view of the pressing plate in the utility model.

[0027] Figure 8 It is a top view of the pressing plate in the utility model.

[0028] Figure 9 It is a perspective view of the pressure plate in the utility model;

[0029] Figure 10 It is a perspective view of the pressure block in the utility model;

[0030] Figure 11 It is a perspective view of the high-pressure front machine case welding assembly after clamped by the machining clamp provided by the utility model.

[0031] Explanation of reference numerals: 1, bottom plate; 1a, first lightening hole; 1b, second lightening hole; 2, movable block; 2a, rectangular hole; 2b, pressure plate mounting column; 2c, stop opening; 3, pressure plate; 3a, strip-shaped hole; 3b, columnar body; 4, pressure block; 5, first screw; 6, second screw; 7, third screw; 8, machine tool platform; 101, upper mounting edge; 102, lower mounting edge. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0033] It should be noted that all directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly.

[0034] In addition, the description of "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of those skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0035] In combination Figures 4 to 10As shown in the figure, a machining clamp for high-pressure front machine case welding assembly includes a base plate 1, movable blocks 2, a pressing plate 3 and a pressing block 4; a plurality of movable blocks 2 are annularly and uniformly distributed on the top surface of the base plate 1; two rectangular holes 2a are arranged on each movable block 2; the pressing block 4 is arranged on the movable blocks 2, and a first screw 5 is inserted into the pressing block 4, the screw rod of the first screw 5 is screwed into the base plate 1 through the rectangular hole 2a; the side length of the rectangular hole 2a is greater than the outer diameter of the screw rod of the first screw 5; the long direction of the rectangular hole 2a is parallel to the radial direction of the base plate 1, and a pressing plate mounting column 2b is arranged on the movable block 2; the pressing plate 3 is mounted on the top surface of the pressing plate mounting column 2b through a second screw 6; an arc-shaped boss is arranged on the top surface of the movable block 2, and a stop 2c is arranged on the arc-shaped boss.

[0036] In combination Figure 11 As shown in the figure, by using the above machining clamp, when the high-pressure front machine case welding assembly is clamped, the specific operation steps are as follows:

[0037] S1, first loosen the first screw 5, adjust the radial position of the movable block 2 on the base plate 1, so that the stop 2c on the movable block 2 is clamped on the mounting edge to be clamped, then tighten the first screw 5, so that the pressing block 4 presses the movable block 2 on the base plate 1.

[0038] S2, by tightening the second screw 6, the pressing end of the pressing plate 3 is pressed on the mounting edge to be clamped, and the clamping is completed.

[0039] Therefore, since the radial position of the movable block 2 can be adjusted, one set of clamp can clamp the mounting edges at both ends of the high-pressure front machine case welding assembly.

[0040] In this embodiment, a strip-shaped hole 3a is also arranged on the pressing plate 3; the screw rod of the second screw 6 passes through the strip-shaped hole 3a and is screwed into the threaded hole on the top surface of the pressing plate mounting column 2b. When clamping and pressing, by cooperating the strip-shaped hole 3a with the second screw 6, the radial position of the pressing plate 3 is adjusted, so that the pressing end of the pressing plate 3 is better pressed on the mounting edge to be clamped.

[0041] In combination Figures 7 to 9 As shown in the figure, a columnar body 3b is arranged on the bottom surface of the pressing end of the pressing plate 3. When pressing, the bottom surface of the columnar body 3b is pressed on the mounting edge of the high-pressure front machine case welding assembly to be clamped, so as to avoid the interference between the arc-shaped boss on the top surface of the movable block and the pressing plate 3, and to ensure the pressing effect.

[0042] In combination Figure 6As shown, the length of the rectangular hole 2a is L, the outer diameter of the screw rod of the first screw 5 is B, and the following requirement is met: L-B>C; wherein C is the difference between the outer diameters of the upper mounting edge 101 and the lower mounting edge 101 of the high-pressure front casing welded assembly. By designing the length L of the rectangular hole 2a, the moving distance of the movable block 2 in the radial direction is ensured to be greater than the difference between the outer diameters of the upper mounting edge 101 and the lower mounting edge 101, thereby ensuring that the stopper 2c on the movable block 2 can be clamped on the clamped mounting edge.

[0043] Further, the width of the rectangular hole 2a is D, and the following requirement is met: D≥1.5B. Through the size design, the circumferential position of the movable block 2 can be fine-tuned.

[0044] In the embodiment, a plurality of first lightening holes 1a are uniformly distributed in a ring shape on the bottom plate 1, and the first lightening holes 1a are fan-shaped through holes. Further, a second lightening hole 1b is arranged at the center of the bottom plate 1, and the second lightening hole 1b is a circular through hole.

[0045] In combination Figure 4 As shown, the machining clamp further comprises a machine tool platform 7, and the bottom plate 1 is placed on the machine tool platform 7. Four screw through holes with a diameter of φ20 mm are uniformly distributed in a ring shape on the bottom plate 1, and a third screw 7 is matched and inserted in the screw through hole, and the lower end of the third screw 7 is screwed on the machine tool platform 7. The bottom plate 1 is fixed on the machine tool platform 7 through the third screw 7.

[0046] The above only describes preferred embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation or direct / indirect application in other related technical fields within the concept of the present application, as described in the present application and the drawings, is included in the patent protection scope of the present application.

Claims

1. A machining fixture for a high-pressure front casing welding assembly, characterized in that, It includes a base plate (1), a movable block (2), a pressure plate (3), and a pressure block (4); Multiple movable blocks (2) are evenly distributed in a ring on the top surface of the base plate (1); Two rectangular holes (2a) are provided on each live block (2); The pressure block (4) rests on the movable block (2), and a first screw (5) is inserted into the pressure block (4). The screw of the first screw (5) passes through the rectangular hole (2a) and is screwed onto the base plate (1). The side length of the rectangular hole (2a) is greater than the outer diameter of the screw of the first screw (5). A pressure plate mounting post (2b) is provided on the movable block (2); the pressure plate (3) is mounted on the top surface of the pressure plate mounting post (2b) by a second screw (6); An arc-shaped boss is provided on the top surface of the movable block (2), and a stop (2c) is provided on the arc-shaped boss.

2. The machining fixture for a high-pressure front casing welding assembly as described in claim 1, characterized in that, A strip hole (3a) is also provided on the pressure plate (3); the screw of the second screw (6) passes through the strip hole (3a) and then screws into the threaded hole on the top surface of the pressure plate mounting post (2b).

3. The machining fixture for a high-pressure front casing welding assembly as described in claim 1, characterized in that, One end of the pressure plate (3) is configured as a pressing end, and a columnar body (3b) is provided on the bottom surface of the pressing end.

4. The machining fixture for a high-pressure front casing welding assembly as described in claim 1, characterized in that, The length of the rectangular hole (2a) is L, and the outer diameter of the first screw (5) is B, then the following requirements are met: LB > C; Where C is the difference in outer diameter between the upper and lower mounting sides of the high-pressure front casing welding assembly.

5. The machining fixture for a high-pressure front casing welding assembly as described in claim 4, characterized in that, The width of the rectangular hole (2a) is D, which satisfies: D≥1.5B.

6. The machining fixture for a high-pressure front casing welding assembly as described in claim 1, characterized in that, Multiple first relief holes (1a) are evenly distributed in a ring on the base plate (1), and the first relief holes (1a) are fan-shaped through holes.

7. The machining fixture for a high-pressure front casing welding assembly as described in claim 1, characterized in that, A second relief hole (1b) is provided at the center of the base plate (1), and the second relief hole (1b) is a circular through hole.

8. The machining fixture for a high-pressure front casing welding assembly as described in claim 1, characterized in that, It also includes a machine tool platform (7), the base plate (1) is placed on the machine tool platform (7); four screw holes with a diameter of φ20mm are evenly distributed in a ring on the base plate (1), and a third screw is inserted in the screw holes, and the lower end of the third screw is screwed onto the machine tool platform (7).

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