Beveling type expansion clamp for machining special-shaped aluminum alloy flange

Abstract

The utility model belongs to the technical field of tool clamps, and relates to a beveling type expansion clamp for machining a special-shaped aluminum alloy flange. The fixture comprises a fixture main seat, four-axis L-shaped plates are arranged at the two ends of the fixture main seat, and two first process flange fixing seats and two second process flange fixing seats are arranged on the fixture main seat. And two first V-shaped positioning blocks which can do horizontal linear motion along one end close to or far away from the first process flange fixing seats are arranged between the two first process flange fixing seats. In the using process, the first V-shaped positioning block and the second V-shaped positioning block are pulled by the first wedge pressing device and the second wedge pressing device to horizontally slide and can be tightly matched with the first process flange fixing seat and the second process flange fixing seat to clamp a product. By means of the design, when the four-axis machining center machines four machining faces at a time, a product can be kept at a stable position, displacement in the machining process is effectively avoided, and therefore the machining efficiency and the machining precision are improved.

Description

Technical Field

[0001] This utility model belongs to the field of tooling and fixture technology, and relates to a beveled expansion clamp for machining irregular aluminum alloy flanges. Background Technology

[0002] In the machining of irregular-shaped aluminum alloy flanges, traditional fixtures struggle to achieve stable clamping and precise positioning due to their complex shapes. Existing fixtures often fail to meet the stringent positional accuracy requirements of multi-faceted machining, resulting in the positional accuracy between the surfaces of the machined flange falling short of design standards. Furthermore, existing fixtures lack flexibility and adaptability for irregular-shaped aluminum alloy flanges of varying shapes and sizes, failing to effectively address the support challenges during machining of complex flanges, thus impacting machining quality and efficiency. Therefore, there is an urgent need to design a beveled expansion fixture for machining irregular-shaped aluminum alloy flanges that can overcome these shortcomings.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, a Chinese patent discloses a flange clamp [application number: 201810829713.7], which includes a base, a retaining shaft, and a positioning pin. The base is provided with a retaining ring surface, a first limiting surface, a positioning shaft hole, and a positioning pin hole. The first limiting surface surrounds the retaining ring surface, and the positioning pin hole is located on one side of the positioning shaft hole. The retaining shaft includes a limiting part and a positioning post. The positioning post is used to extend into and fix in the positioning shaft hole, and the limiting part approaches the first limiting surface as the positioning post extends into the positioning shaft hole. The limiting part is provided with a second limiting surface facing the first limiting surface. The second limiting surface, the retaining ring surface, and the first limiting surface together form a retaining groove to limit the axial and radial movement of the flange. The positioning pin is used to pass through the positioning hole and the positioning pin hole on the flange in sequence to limit the circumferential rotation of the flange. However, this solution still lacks flexibility and adaptability for irregular aluminum alloy flanges of different shapes and sizes during use, and has the defects of not being able to effectively solve the support during the processing of complex-shaped flanges and affecting the processing quality and efficiency. Utility Model Content

[0004] The purpose of this utility model is to address the above-mentioned problems by providing a beveled expansion clamp for machining irregularly shaped aluminum alloy flanges.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A chamfered expansion clamp for machining irregular aluminum alloy flanges includes a main clamping seat with four-axis L-plates at both ends. The main clamping seat has two first-process flange fixing seats and two second-process flange fixing seats. Between the two first-process flange fixing seats are two first V-shaped positioning blocks that can move horizontally linearly along one end of the first-process flange fixing seat or away from it. The first-process flange fixing seats have clamping force adjusting and positioning components. Between the two second-process flange fixing seats are two second V-shaped positioning blocks that can move horizontally linearly along one end of the second-process flange fixing seat or away from it. The second-process flange fixing seats have auxiliary support components. The main clamping seat contains a first wedge clamping device and a second wedge clamping device for driving the first-process flange fixing seats and the second-process flange fixing seats to slide horizontally.

[0007] In the aforementioned oblique-cut expansion clamp for processing irregular aluminum alloy flanges, the clamping force adjustment and positioning assembly includes a first adjusting nut disposed on the first process flange fixing seat. The first adjusting nut is threadedly connected to the lead screw in the first process flange fixing seat. A first tapered mandrel is provided at the end of the first adjusting nut away from the first process flange fixing seat. The position of the first tapered mandrel corresponds to that of the first V-shaped positioning block.

[0008] In the aforementioned oblique-cut expansion clamp for processing irregular aluminum alloy flanges, a second adjusting nut is provided on the first V-shaped positioning block. The second adjusting nut is threadedly connected to the lead screw inside the first V-shaped positioning block. A second tapered mandrel is provided at the end of the second adjusting nut away from the first oblique wedge clamping device. The second tapered mandrel is positioned opposite the first tapered mandrel.

[0009] In the above-mentioned oblique-cut expansion clamp for processing irregular aluminum alloy flanges, the first oblique wedge clamping device includes a first oblique wedge clamping block disposed in the main seat of the clamp. The first oblique wedge clamping block has oblique surfaces on both sides, and the first V-shaped positioning block has an oblique surface on its inner side. The oblique surface of the first oblique wedge clamping block cooperates with the oblique surface of the first V-shaped positioning block.

[0010] In the above-mentioned oblique-cut expansion clamp for processing irregular aluminum alloy flanges, the first V-shaped positioning block is slidably engaged with the main seat of the clamp, the top of the first oblique wedge clamping block is provided with a first baffle, the main seat of the clamp is provided with a first cylinder, and the power shaft of the first cylinder is connected to the first oblique wedge clamping block.

[0011] In the aforementioned oblique-cut expansion fixture for machining irregular aluminum alloy flanges, the auxiliary support assembly includes an elastic support block and an adjustable support pin disposed on the flange fixing seat of the second process, and the adjustable support pin is screwed to the flange fixing seat of the second process.

[0012] In the above-mentioned oblique-cut expansion clamp for processing irregular aluminum alloy flanges, the second oblique wedge clamping device includes a second oblique wedge clamping block disposed in the main seat of the clamp. The second oblique wedge clamping block has oblique surfaces on both sides, and the second V-shaped positioning block has an oblique surface on its inner side. The oblique surface of the second oblique wedge clamping block cooperates with the oblique surface of the second V-shaped positioning block.

[0013] In the above-mentioned oblique-cut expansion clamp for processing irregular aluminum alloy flanges, the second V-shaped positioning block is slidably engaged with the main seat of the clamp, the top of the second oblique wedge clamping block is provided with a second baffle, the main seat of the clamp is provided with a second cylinder, and the power shaft of the second cylinder is connected to the second oblique wedge clamping block.

[0014] In the aforementioned oblique-cut expansion fixture for machining irregular aluminum alloy flanges, the flange fixing seat and the main fixture seat in the first process are connected by fastening bolts.

[0015] In the aforementioned oblique-cut expansion fixture for machining irregular aluminum alloy flanges, the flange fixing seat and the main fixture seat in the second process are connected by fastening bolts.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. In use, this utility model utilizes a first and a second wedge clamping device to pull the first and second V-shaped positioning blocks horizontally, enabling them to tightly clamp the product in conjunction with the first and second process flange fixing seats. This design allows the product to maintain a stable position while machining four surfaces simultaneously on a four-axis machining center, effectively preventing displacement during machining and thus improving machining efficiency and accuracy.

[0018] 2. This utility model can achieve stepless adjustment of clamping force by adjusting the clamping force positioning component. For irregular aluminum alloy flanges of different sizes and materials, the clamping force can be flexibly adjusted according to actual needs, which can ensure the stability of clamping and avoid damage to the flange surface due to excessive clamping force, thereby improving the versatility and adaptability of the fixture.

[0019] 3. The auxiliary support component in this utility model can be flexibly adjusted according to the shape of the flange and the processing part. It can provide effective support for complex-shaped aluminum alloy flanges, solve the support problem that traditional clamps cannot solve, expand the application range of the clamps, and adapt to the processing needs of various irregular-shaped aluminum alloy flanges.

[0020] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the usage state of this utility model.

[0022] Figure 2 This is a top view of the utility model in use.

[0023] Figure 3 This is a schematic diagram of the structure of this utility model.

[0024] Figure 4 This is a top view of the present invention.

[0025] In the diagram: 1. Fixture main seat; 2. Four-axis L-plate; 3. First process flange fixing seat; 4. Second process flange fixing seat; 5. First V-shaped positioning block; 6. Clamping force adjusting positioning assembly; 7. Second V-shaped positioning block; 8. Auxiliary support assembly; 9. First wedge clamping device; 10. Second wedge clamping device; 11. First adjusting nut; 12. First tapered mandrel; 13. Second adjusting nut; 14. Second tapered mandrel; 15. First wedge clamping block; 16. First baffle; 17. Elastic support block; 18. Adjustable support pin; 19. Second wedge clamping block; 20. Second baffle; 21. Second cylinder; 22. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] like Figure 1-4 As shown, a chamfered expansion clamp for machining irregular aluminum alloy flanges includes a clamping main seat 1. The clamping main seat 1 has four-axis L-plates 2 at both ends. The clamping main seat 1 has two first-process flange fixing seats 3 and two second-process flange fixing seats 4. Between the two first-process flange fixing seats 3 are two first V-shaped positioning blocks 5 that can move horizontally along one end of the first-process flange fixing seats 3 or away from it. The first-process flange fixing seats 3 have a clamping force adjusting positioning component 6. Between the two second-process flange fixing seats 4 are two second V-shaped positioning blocks 7 that can move horizontally along one end of the second-process flange fixing seats 4 or away from it. The second-process flange fixing seats 4 have an auxiliary support component 8. The clamping main seat 1 contains a first wedge clamping device 9 and a second wedge clamping device 10 for driving the first-process flange fixing seats 3 and the second-process flange fixing seats 4 to slide horizontally.

[0028] In this embodiment, the two first-process flange fixing seats 3 and the two second-process flange fixing seats 4 on the main fixture 1 are used to initially position the irregular aluminum alloy flange for processing in different processes. The first V-shaped positioning block 5 and the second V-shaped positioning block 7 can move horizontally between the corresponding two first-process flange fixing seats 3 and the two second-process flange fixing seats 4, respectively, to clamp the flange in conjunction with the fixing seats. The first wedge clamping device 9 and the second wedge clamping device 10 are set in the main fixture 1, respectively driving the first-process flange fixing seats 3 and the second-process flange fixing seats 4 to slide horizontally, while driving the first V-shaped positioning block 5 and the second V-shaped positioning block 7 to move, thus completing the clamping action. This structural design allows the fixture to process four processing surfaces at once in conjunction with a four-axis machining center. Compared with traditional fixtures that can only process a small number of surfaces at a time, this greatly improves processing efficiency, and the cooperation of multiple fixing seats and positioning blocks ensures the stability of the flange during processing.

[0029] Combination Figure 1-4 As shown, the clamping force adjusting and positioning assembly 6 includes a first adjusting nut 11 disposed on the first process flange fixing seat 3. The first adjusting nut 11 is threadedly connected to the lead screw in the first process flange fixing seat 3. A first tapered mandrel 12 is provided at the end of the first adjusting nut 11 away from the first process flange fixing seat 3. The first tapered mandrel 12 corresponds to the position of the first V-shaped positioning block 5. A second adjusting nut 13 is disposed on the first V-shaped positioning block 5. The second adjusting nut 13 is threadedly connected to the lead screw in the first V-shaped positioning block 5. A second tapered mandrel 14 is provided at the end of the second adjusting nut 13 away from the first wedge clamping device 9. The second tapered mandrel 14 is positioned opposite the first tapered mandrel 12.

[0030] In this embodiment, when the clamping force needs to be adjusted, the first adjusting nut 11 is rotated. Due to the threaded transmission, the lead screw drives the first adjusting nut 11 to move axially. The first tapered spindle 12 at the end of the first adjusting nut 11 away from the first process flange fixing seat 3 moves accordingly. The first V-shaped positioning block 5 is provided with a second adjusting nut 13, which is threadedly connected to the lead screw in the first V-shaped positioning block 5. The end of the second adjusting nut 13 away from the first wedge clamping device 9 is provided with a second tapered spindle 14. The second tapered spindle 14 is set opposite to the first tapered spindle 12. By adjusting the second adjusting nut 13, the second tapered spindle 14 and the first tapered spindle 12 can cooperate with each other. According to the size of the flange and the required clamping force, the distance and degree of cooperation between the two can be adjusted to achieve stepless adjustment of the clamping force.

[0031] Combination Figure 3 , Figure 4As shown, the first wedge clamping device 9 includes a first wedge clamping block 15 disposed in the main fixture seat 1. The first wedge clamping block 15 has inclined surfaces on both sides, and the first V-shaped positioning block 5 has an inclined surface on its inner side. The inclined surfaces of the first wedge clamping block 15 cooperate with the inclined surfaces of the first V-shaped positioning block 5. The first V-shaped positioning block 5 is slidably engaged with the main fixture seat 1. A first baffle 16 is provided on the top of the first wedge clamping block 15. A first cylinder 17 is provided in the main fixture seat 1. The power shaft of the first cylinder 17 is connected to the first wedge clamping block 15.

[0032] In this embodiment, the first wedge clamping device 9 includes a first wedge clamping block 15 disposed within the main fixture seat 1. The first wedge clamping block 15 has inclined surfaces on both sides, and the first V-shaped positioning block 5 has an inclined surface on its inner side. The inclined surfaces of the first wedge clamping block 15 cooperate with the inclined surfaces of the first V-shaped positioning block 5. The first V-shaped positioning block 5 is slidably engaged with the main fixture seat 1 to ensure that it can perform horizontal linear movement on the main fixture seat 1. A first baffle 16 is provided on the top of the first wedge clamping block 15. A first cylinder 17 is provided inside the main fixture seat 1. The power shaft of the first cylinder 17 is connected to the first wedge clamping block 15. When the first cylinder 17 is working, the power shaft pushes the first wedge clamping block 15. As the clamping block 15 moves, the inclined wedge clamping block 15 engages with the inclined surface of the first V-shaped positioning block 5. During the movement of the first inclined wedge clamping block 15, it pushes the first V-shaped positioning block 5 to move horizontally in a straight line along the direction close to the first process flange fixing seat 3, thereby clamping the flange. Through the inclined surface engagement, the thrust of the first cylinder 17 can be converted into a horizontal clamping force. Furthermore, the angle design of the inclined surface ensures the transmission accuracy and stability of the clamping force, enabling the positional accuracy between the surfaces of the flange to meet the design standards during multi-face machining in a four-axis machining center. This solves the problem that traditional fixtures cannot guarantee the positional accuracy of multi-face machining.

[0033] Combination Figure 4 As shown, the auxiliary support assembly 8 includes an elastic support block 18 and an adjustable support pin 19 disposed on the second process flange fixing seat 4, and the adjustable support pin 19 is screwed to the second process flange fixing seat 4.

[0034] In this embodiment, for irregularly shaped aluminum alloy flanges, the extension length of the adjustable support pin 19 can be adjusted by rotating it to make it contact a specific part of the flange, providing stable support. Simultaneously, the elastic support block 18 can generate a certain amount of elastic deformation according to the shape and stress of the flange, providing support while avoiding rigid damage to the flange surface. This flexibly adjustable auxiliary support component 8 effectively solves the support problem during the processing of complex-shaped flanges, adapting to the processing needs of various irregularly shaped aluminum alloy flanges. Compared with traditional fixed support structures, it has stronger adaptability and practicality.

[0035] The second wedge clamping device 10 includes a second wedge clamping block 20 disposed in the main fixture seat 1. The second wedge clamping block 20 has inclined surfaces on both sides, and the second V-shaped positioning block 7 has an inclined surface on its inner side. The inclined surfaces of the second wedge clamping block 20 cooperate with the inclined surfaces of the second V-shaped positioning block 7. The second V-shaped positioning block 7 is slidably engaged with the main fixture seat 1. A second baffle 21 is provided on the top of the second wedge clamping block 20. A second cylinder 22 is provided in the main fixture seat 1. The power shaft of the second cylinder 22 is connected to the second wedge clamping block 20.

[0036] In this embodiment, the second wedge clamping device 10 includes a second wedge clamping block 20 disposed in the main fixture seat 1. The second wedge clamping block 20 has inclined surfaces on both sides, and the second V-shaped positioning block 7 has an inclined surface on its inner side. The inclined surfaces of the second wedge clamping block 20 cooperate with the inclined surfaces of the second V-shaped positioning block 7. The second V-shaped positioning block 7 is slidably engaged with the main fixture seat 1. A second baffle 21 is provided on the top of the second wedge clamping block 20. A second cylinder 22 is provided in the main fixture seat 1. The power shaft of the second cylinder 22 is connected to the second wedge clamping block 20. The working principle is similar to that of the first wedge clamping device 9. When the second cylinder 22 works, it pushes the second wedge clamping block 20 to move, thereby driving the second V-shaped positioning block 7 to slide horizontally. It cooperates with the second process flange fixing seat 4 to clamp the flange. By controlling the clamping action of different processes through the two wedge clamping devices, the flange can always be kept in a stable clamping state during the process of machining multiple surfaces in one operation in the four-axis machining center, ensuring machining accuracy and efficiency.

[0037] Combination Figure 1-2 As shown, the first process flange fixing seat 3 and the fixture main seat 1 are connected by fastening bolts, and the second process flange fixing seat 4 and the fixture main seat 1 are connected by fastening bolts.

[0038] In this embodiment, the first process flange fixing seat 3 and the fixture main seat 1, and the second process flange fixing seat 4 and the fixture main seat 1 are all connected by fastening bolts. This connection method facilitates installation and disassembly. When facing different types of irregular aluminum alloy flange processing requirements, the position and quantity of the first process flange fixing seat 3 and the second process flange fixing seat 4 can be easily replaced or adjusted according to the actual situation, which improves the flexibility and versatility of the fixture.

[0039] The working principle of this utility model is as follows:

[0040] When using this fixture to process irregularly shaped aluminum alloy flanges, the flange is first placed on the first-process flange fixing seat 3 and the second-process flange fixing seat 4 for initial positioning. Based on the size and shape of the flange, the first adjusting nut 11 and the second adjusting nut 13 in the positioning assembly 6 are adjusted by adjusting the clamping force to adjust the positions of the first tapered mandrel 12 and the second tapered mandrel 14, thereby achieving appropriate clamping force adjustment.

[0041] Next, the first cylinder 17 is activated. The power shaft of the first cylinder 17 pushes the first wedge clamping block 15 to move. Since the first wedge clamping block 15 engages with the inclined surface of the first V-shaped positioning block 5, the first V-shaped positioning block 5 slides horizontally under the push of the first wedge clamping block 15, clamping the flange with the first process flange fixing seat 3. At the same time, the second cylinder 22 is activated. The second cylinder 22 pushes the second wedge clamping block 20 to move, causing the second V-shaped positioning block 7 to slide, engaging with the second process flange fixing seat 4 to clamp the flange.

[0042] During the processing, the auxiliary support assembly 8 provides stable and suitable support for the flange by adjusting the adjustable support pins 19 and using the elastic support blocks 18, according to the shape of the flange and the processing location. At this time, the fixture works with the four-axis machining center to complete the processing of four processing surfaces at once. Throughout the processing, the inclined surface structure ensures the precise positioning and stable clamping between the components, ensuring that the positional accuracy between the surfaces of the flange after processing meets the design standards, thus achieving efficient and precise processing of irregular aluminum alloy flanges.

[0043] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.

[0044] Although this document frequently uses terms such as clamp main seat 1, four-axis L-plate 2, first process flange fixing seat 3, second process flange fixing seat 4, first V-shaped positioning block 5, clamping force adjusting positioning assembly 6, second V-shaped positioning block 7, auxiliary support assembly 8, first wedge clamping device 9, second wedge clamping device 10, first adjusting nut 11, first conical mandrel 12, second adjusting nut 13, second conical mandrel 14, first wedge clamping block 15, first baffle 16, first cylinder 17, elastic support block 18, adjustable support pin 19, second wedge clamping block 20, second baffle 21, and second cylinder 22, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A beveled expansion clamp for machining irregularly shaped aluminum alloy flanges, comprising a clamp main seat (1), wherein the clamp main seat (1) is provided with four-axis L-plates (2) at both ends, characterized in that, The main fixture (1) is provided with two first process flange fixing seats (3) and two second process flange fixing seats (4). Between the two first process flange fixing seats (3), there are two first V-shaped positioning blocks (5) that can move horizontally in a straight line along one end close to or away from the first process flange fixing seat (3). The first process flange fixing seat (3) is provided with a clamping force adjusting positioning component (6). Between the two second process flange fixing seats (4), there are two second V-shaped positioning blocks (7) that can move horizontally in a straight line along one end close to or away from the second process flange fixing seat (4). The second process flange fixing seat (4) is provided with an auxiliary support component (8). The main fixture (1) is provided with a first wedge clamping device (9) and a second wedge clamping device (10) for driving the first process flange fixing seat (3) and the second process flange fixing seat (4) to slide horizontally.

2. The oblique-cut expansion clamp for machining irregular aluminum alloy flanges according to claim 1, characterized in that, The clamping force adjusting and positioning assembly (6) includes a first adjusting nut (11) disposed on the first process flange fixing seat (3). The first adjusting nut (11) is threadedly connected to the lead screw in the first process flange fixing seat (3). A first tapered mandrel (12) is provided at the end of the first adjusting nut (11) away from the first process flange fixing seat (3). The position of the first tapered mandrel (12) corresponds to that of the first V-shaped positioning block (5).

3. The oblique-cut expansion clamp for machining irregular aluminum alloy flanges according to claim 2, characterized in that, The first V-shaped positioning block (5) is provided with a second adjusting nut (13). The second adjusting nut (13) is threadedly connected to the lead screw inside the first V-shaped positioning block (5). The second adjusting nut (13) is provided with a second conical mandrel (14) at the end away from the first wedge pressing device (9). The second conical mandrel (14) is directly opposite to the first conical mandrel (12).

4. The oblique-cut expansion clamp for machining irregular aluminum alloy flanges according to claim 3, characterized in that, The first wedge clamping device (9) includes a first wedge clamping block (15) disposed in the main seat of the clamp (1). The first wedge clamping block (15) has inclined surfaces on both sides, and the first V-shaped positioning block (5) has an inclined surface on its inner side. The inclined surface of the first wedge clamping block (15) cooperates with the inclined surface of the first V-shaped positioning block (5).

5. The oblique-cut expansion clamp for machining irregular aluminum alloy flanges according to claim 4, characterized in that, The first V-shaped positioning block (5) is slidably engaged with the main seat of the clamp (1). The top of the first wedge clamping block (15) is provided with a first baffle (16). The main seat of the clamp (1) is provided with a first cylinder (17). The power shaft of the first cylinder (17) is connected to the first wedge clamping block (15).

6. The oblique-cut expansion clamp for machining irregular aluminum alloy flanges according to claim 1, characterized in that, The auxiliary support assembly (8) includes an elastic support block (18) and an adjustable support pin (19) disposed on the second process flange fixing seat (4), and the adjustable support pin (19) is screwed to the second process flange fixing seat (4).

7. The oblique-cut expansion clamp for machining irregular aluminum alloy flanges according to claim 1, characterized in that, The second wedge clamping device (10) includes a second wedge clamping block (20) disposed in the main seat of the clamp (1). The second wedge clamping block (20) has inclined surfaces on both sides, and the second V-shaped positioning block (7) has an inclined surface on its inner side. The inclined surface of the second wedge clamping block (20) cooperates with the inclined surface of the second V-shaped positioning block (7).

8. The oblique-cut expansion clamp for machining irregular aluminum alloy flanges according to claim 7, characterized in that, The second V-shaped positioning block (7) is slidably engaged with the main seat of the clamp (1). The top of the second wedge clamping block (20) is provided with a second baffle (21). The main seat of the clamp (1) is provided with a second cylinder (22). The power shaft of the second cylinder (22) is connected to the second wedge clamping block (20).

9. The oblique-cut expansion clamp for machining irregular aluminum alloy flanges according to claim 1, characterized in that, The flange fixing seat (3) of the first process is connected to the main seat of the clamp (1) by fastening bolts.

10. The oblique-cut expansion clamp for machining irregular aluminum alloy flanges according to claim 1, characterized in that, The flange fixing seat (4) of the second process is connected to the main seat of the clamp (1) by fastening bolts.

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