A machining clamping tool for an aviation aluminum alloy tubular casting

Abstract

The utility model provides a kind of aviation aluminum alloy pipe shape casting processing clamping tool, it is related to aviation aluminum alloy casting processing technical field, including processing table, the inside of processing table is provided with moving mechanism, and moving mechanism includes bidirectional screw rod, by moving mechanism, make its first servo motor drive bidirectional screw rod rotation, utilize screw thread drive to make threaded block slide in stroke groove, realize the transverse movement of inner support mechanism, conveniently and quickly move inner support mechanism to pipe inside, and inner support mechanism, telescopic sleeve relative movement extrusion, drive arc inner support plate to expand outward, can be according to pipe shape casting inner diameter self-adapting adjustment support range, can more stably support pipe shape casting inner wall, prevent deformation when processing, by second worm wheel to make rotating lever and connected component rotation, realize the rotation adjustment of pipe shape casting, reduce labor intensity, and can accurate, fast adjustment processing angle, improve the effect of processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of aerospace aluminum alloy casting processing technology, and in particular to a clamping fixture for processing aerospace aluminum alloy tubular castings. Background Technology

[0002] There are approximately 1,600 to 2,100 types of aluminum castings in current aircraft components. With the continuous improvement of the overall level of China's aerospace industry, the requirements for aluminum castings are also developing towards higher precision, higher performance, greater complexity, and greater integration. The lightweight and thin-walled transformation of large aluminum castings is an important direction for the development of modern casting technology. Existing thin-walled aerospace aluminum alloy tubular castings often require openings. During the opening process, the clamping fixtures need to provide effective internal support to avoid deformation of the tubular castings.

[0003] For example, a clamping device for machining thin-walled aerospace aluminum alloy tubular castings disclosed in Chinese patent literature (publication number: CN217433774U) has a spiral clearance groove on the outer side of the cylindrical inner support body of the clamping mechanism. The two cylindrical inner supports can effectively provide support for the tubular casting. At the same time, rotating the cylindrical inner support body can quickly move part of the spiral clearance groove to the opening position, thus meeting the opening clearance requirements and the support around the opening.

[0004] However, since the dimensions of the cylindrical inner support are fixed, its contact range with the inner wall of the tubular casting is limited, and it can only provide support in specific areas. When the tubular casting is subjected to external processing forces, the area outside the support range is prone to deformation due to the lack of effective support. It is difficult to ensure the stability of the entire tubular casting during the processing. Furthermore, when the tubular casting is rotated to adjust the processing angle, it is difficult to accurately control the rotation angle and force by manual operation. It often takes a lot of time to adjust to the appropriate processing angle. The manual operation is labor-intensive and seriously affects the processing efficiency. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as the poor stability of aerospace aluminum alloy tubular castings during processing and the need for manual rotation and angle adjustment, which seriously affects processing efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A clamping fixture for machining aerospace aluminum alloy tubular castings includes a machining table. The machining table has a moving mechanism inside, and the moving mechanism includes a bidirectional lead screw. The two ends of the bidirectional lead screw are respectively rotatably connected to the inner walls of the two sides of the machining table.

[0008] The upper end of the processing table is provided with symmetrically distributed stroke grooves. The inner wall of the stroke groove is slidably connected with a threaded block. The inner wall of the threaded block is connected to the external thread of the bidirectional lead screw. A first servo motor is fixedly installed on the inner top wall of the processing table. The output shaft of the first servo motor is fixedly installed with a first worm gear through a coupling. A first worm wheel is fixedly sleeved on the outside of the bidirectional lead screw. The tooth surface of the first worm wheel meshes with the outer surface of the first worm gear.

[0009] An internal support mechanism is provided above the processing table.

[0010] Preferably, the upper end of the processing table is fixedly equipped with symmetrically distributed hydraulic cylinders, and one end of the piston rod of each of the two hydraulic cylinders is fixedly connected to a lifting frame.

[0011] Preferably, the inner support mechanism includes mounting plates, the lower ends of the two mounting plates are respectively fixedly connected to the upper ends of the two threaded blocks, and the inner wall of the mounting plates is rotatably connected to a rotating rod via a bearing.

[0012] Preferably, a rectangular rod is fixedly connected to one end of the rotating rod, and a first support arranged in a circular array is fixedly connected to the outside of the rectangular rod. A first support rod is hinged to the inner wall of the first support through a pin.

[0013] Preferably, one end of the first support rod is hinged to a second support via a pin, a telescopic sleeve is movably sleeved on the outside of the rectangular rod, a return spring is fixedly connected to the inner wall of one side of the telescopic sleeve, one end of the return spring is fixedly connected to one end of the rectangular rod, and a third support arranged in a ring array is fixedly connected to the outside of the telescopic sleeve.

[0014] Preferably, the inner wall of the third support is hinged to a second support rod by a pin, one end of the second support rod is hinged to a fourth support by a pin, and the upper ends of the fourth support and the second support are both fixedly connected to an arc-shaped inner support plate.

[0015] Preferably, a second worm gear is fixedly sleeved on the other end of the rotating rod, a second servo motor is fixedly installed on one side of the mounting plate, and a second worm is fixedly installed on the output shaft of the second servo motor through a coupling. The outer surface of the second worm meshes with the tooth surface of the second worm gear.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] In this invention, a moving mechanism drives a bidirectional lead screw to rotate via a first servo motor. Threaded transmission causes the threaded block to slide within the stroke groove, enabling the lateral movement of the inner support mechanism. This allows for convenient and quick movement of the inner support mechanism into the pipe fitting. Furthermore, the relative movement and compression of the telescopic sleeve within the inner support mechanism causes the arc-shaped inner support plate to expand outwards. The support range can be adaptively adjusted according to the inner diameter of the tubular casting, providing more stable support for the inner wall of the tubular casting and preventing deformation during processing. A second worm gear rotates the rotating rod and connected components, enabling rotational adjustment of the tubular casting, reducing labor intensity, and allowing for precise and rapid adjustment of the processing angle, thus improving processing efficiency. Attached Figure Description

[0018] Figure 1 A schematic diagram of the main structure of a clamping fixture for machining aerospace aluminum alloy tubular castings provided by this utility model;

[0019] Figure 2 A three-dimensional view of the machining table structure of a clamping fixture for machining aerospace aluminum alloy tubular castings provided by this utility model;

[0020] Figure 3 A three-dimensional view of the arc-shaped inner support plate structure of a clamping fixture for machining aerospace aluminum alloy tubular castings provided by this utility model;

[0021] Figure 4 A three-dimensional view of a rectangular rod structure for a clamping fixture used in machining aerospace aluminum alloy tubular castings, provided by this utility model.

[0022] Legend: 1. Machining table; 2. Bidirectional lead screw; 21. Stroke groove; 22. Threaded block; 23. First servo motor; 24. First worm gear; 25. First worm wheel; 26. Hydraulic cylinder; 27. Lifting frame; 3. Mounting plate; 31. Rotating rod; 32. Rectangular rod; 33. First support; 34. First support rod; 35. Second support; 36. Telescopic sleeve; 37. Return spring; 38. Third support; 39. Second support rod; 310. Fourth support; 311. Arc-shaped inner support plate; 312. Second worm wheel; 313. Second servo motor; 314. Second worm gear. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] Example

[0028] like Figure 1-4 As shown, this utility model provides a technical solution: a clamping fixture for processing aviation aluminum alloy tubular castings, including a processing table 1, a moving mechanism is provided inside the processing table 1, and an inner support mechanism is provided above it. The moving mechanism is used to realize the lateral movement of the inner support mechanism; a hydraulic cylinder 26 and a lifting frame 27 cooperate to adjust the height of the tubular casting; the inner support mechanism provides internal support and fixation and angle adjustment for the tubular casting.

[0029] The machining table 1 is made of sturdy metal material, which has good stability and load-bearing capacity. The two ends of the bidirectional lead screw 2 are rotatably connected to the inner walls of both sides of the machining table 1 through high-precision bearings, ensuring that the bidirectional lead screw 2 can rotate smoothly. The upper end of the machining table 1 is machined to have symmetrically distributed stroke grooves 21. The inner wall of the stroke groove 21 is connected to the threaded block 22 through a sliding fit. The inner wall of the threaded block 22 is connected to the outside of the bidirectional lead screw 2 through a thread. This connection method can convert the rotation of the bidirectional lead screw 2 into the linear motion of the threaded block 22.

[0030] The inner top wall of the processing table 1 is fixed with screws to install the first servo motor 23. The output shaft of the first servo motor 23 is fixedly connected to the first worm gear 24 through a coupling. The coupling can ensure stable power transmission. The outside of the bidirectional lead screw 2 is fixedly sleeved with the first worm wheel 25 through interference fit or key connection. The tooth surface of the first worm wheel 25 and the outer surface of the first worm gear 24 are precisely meshed to achieve reliable meshing.

[0031] The upper end of the processing table 1 is fixed with screws and symmetrically distributed hydraulic cylinders 26. One end of the piston rod of the hydraulic cylinder 26 is fixedly connected to the lifting frame 27 by welding or bolting. This connection method can ensure that the hydraulic cylinder 26 can stably drive the lifting frame 27 to move up and down.

[0032] The lower ends of the two mounting plates 3 are fixedly connected to the upper ends of the two threaded blocks 22 by welding or bolting. The inner wall of the mounting plate 3 is rotatably connected to the rotating rod 31 by a high-precision bearing to ensure that the rotating rod 31 can rotate flexibly.

[0033] One end of the rotating rod 31 is fixedly connected to a rectangular rod 32 by welding or keying. The outside of the rectangular rod 32 is fixedly connected to a first support 33 arranged in a ring array by welding or bolting. The inner wall of the first support 33 is hinged to the first support rod 34 by a pin, so that the first support rod 34 can rotate around the pin.

[0034] One end of the first support rod 34 is hinged to the second support 35 via a pin. The outside of the rectangular rod 32 is connected to the telescopic sleeve 36 by a movable sleeve connection. A return spring 37 is fixedly connected to one side of the inner wall of the telescopic sleeve 36 by welding or bonding. One end of the return spring 37 is fixedly connected to one end of the rectangular rod 32, which allows the telescopic sleeve 36 to return to its original position when no external force is applied. The outside of the telescopic sleeve 36 is fixedly connected to a third support 38 arranged in a ring array by welding or bolting.

[0035] The inner wall of the third support 38 is hinged to the second support rod 39 by a pin. One end of the second support rod 39 is hinged to the fourth support 310 by a pin. The upper ends of the fourth support 310 and the second support 35 are both fixedly connected with arc-shaped inner support plates 311 by welding or bolting, which are used to contact the inner wall of the tubular casting and provide support.

[0036] The other end of the rotating rod 31 is fixedly sleeved with a second worm gear 312 by an interference fit or key connection. The second servo motor 313 is installed on one side of the mounting plate 3 by screws. The output shaft of the second servo motor 313 is fixedly connected to the second worm 314 by a coupling. The outer surface of the second worm 314 and the tooth surface of the second worm gear 312 are precisely meshed to achieve reliable meshing.

[0037] The working process of this utility model:

[0038] Step 1: Before processing the tubular casting, place the tubular component on the lifting frame 27, start the hydraulic cylinder 26, extend the piston rod of the hydraulic cylinder 26, and drive the lifting frame 27 and the tubular component to rise. By controlling the stroke of the hydraulic cylinder 26, the tubular component can be raised to a suitable height to provide a suitable height position for subsequent processing operations, ensuring that the processing equipment can accurately process the tubular component. Start the first servo motor 23, and the output shaft of the first servo motor 23 drives the first worm gear 24 to rotate. The first worm gear 24 meshes with the first worm wheel 25, causing the bidirectional lead screw 2 to rotate. Since the bidirectional lead screw 2 is threadedly connected to the threaded block 22, the threaded block 22 slides in the stroke groove 21, thereby driving the mounting plate 3 and the inner support mechanism to move laterally. By controlling the rotation angle and time of the first servo motor 23, the inner support mechanism can be accurately moved to a suitable position inside the tubular component, making it convenient and quick to complete the positioning of the inner support mechanism.

[0039] Step two: Continue rotating the bidirectional lead screw 2 to move the two telescopic sleeves 36 relative to each other. When the telescopic sleeves 36 penetrate the pipe fitting and come into contact with each other, the movement of the telescopic sleeves 36 drives the second support 35 and the fourth support 310 to move via the first support rod 34 and the second support rod 39. The movement of the second support 35 and the fourth support 310 causes the arc-shaped inner support plate 311 to expand outward and come into close contact with the inner wall of the pipe fitting. Depending on the inner diameter of the pipe fitting, the arc-shaped inner support plate 311 can adaptively adjust its support range to achieve stable internal support and fixation of the pipe fitting, effectively preventing damage to the pipe fitting during processing. When the processing angle of the pipe needs to be adjusted, the second servo motor 313 is started. The output shaft of the second servo motor 313 drives the second worm gear 314 to rotate. The second worm gear 314 meshes with the second worm wheel 312, causing the rotating rod 31 to rotate. The rotation of the rotating rod 31 then drives the rectangular rod 32, the telescopic sleeve 36, and the arc-shaped inner support plate 311 to rotate, thereby realizing the rotation adjustment of the pipe. By controlling the rotation angle and speed of the second servo motor 313, the processing angle of the pipe can be adjusted accurately and quickly. Compared with manual operation, this greatly reduces labor intensity and improves processing efficiency.

[0040] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clamping fixture for machining aerospace aluminum alloy tubular castings, comprising a machining table (1), characterized in that: The processing table (1) is equipped with a moving mechanism, which includes a bidirectional lead screw (2). The two ends of the bidirectional lead screw (2) are rotatably connected to the inner walls of both sides of the processing table (1). The upper end of the processing table (1) is provided with symmetrically distributed stroke grooves (21). The inner wall of the stroke groove (21) is slidably connected with a threaded block (22). The inner wall of the threaded block (22) is connected to the external thread of the bidirectional lead screw (2). The inner top wall of the processing table (1) is fixedly installed with a first servo motor (23). The output shaft of the first servo motor (23) is fixedly installed with a first worm (24) through a coupling. The outer side of the bidirectional lead screw (2) is fixedly sleeved with a first worm wheel (25). The tooth surface of the first worm wheel (25) meshes with the outer surface of the first worm (24). An internal support mechanism is provided above the processing table (1).

2. The clamping fixture for machining aerospace aluminum alloy tubular castings according to claim 1, characterized in that: The upper end of the processing table (1) is fixedly installed with symmetrically distributed hydraulic cylinders (26), and one end of the piston rod of each of the two hydraulic cylinders (26) is fixedly connected to a lifting frame (27).

3. The clamping fixture for machining aerospace aluminum alloy tubular castings according to claim 1, characterized in that: The inner support mechanism includes mounting plates (3), the lower ends of the two mounting plates (3) are fixedly connected to the upper ends of the two threaded blocks (22) respectively, and the inner wall of the mounting plate (3) is rotatably connected to a rotating rod (31) through a bearing.

4. The clamping fixture for machining aerospace aluminum alloy tubular castings according to claim 3, characterized in that: One end of the rotating rod (31) is fixedly connected to a rectangular rod (32), and the outside of the rectangular rod (32) is fixedly connected to a first support (33) arranged in a ring array. The inner wall of the first support (33) is hinged to a first support rod (34) by a pin.

5. The clamping fixture for machining aerospace aluminum alloy tubular castings according to claim 4, characterized in that: One end of the first support rod (34) is hinged to a second support (35) via a pin. A telescopic sleeve (36) is movably sleeved on the outside of the rectangular rod (32). A return spring (37) is fixedly connected to the inner wall of one side of the telescopic sleeve (36). One end of the return spring (37) is fixedly connected to one end of the rectangular rod (32). A third support (38) arranged in a ring array is fixedly connected to the outside of the telescopic sleeve (36).

6. The clamping fixture for machining aerospace aluminum alloy tubular castings according to claim 5, characterized in that: The inner wall of the third support (38) is hinged to a second support rod (39) by a pin. One end of the second support rod (39) is hinged to a fourth support (310) by a pin. The upper ends of the fourth support (310) and the second support (35) are both fixedly connected to an arc-shaped inner support plate (311).

7. The clamping fixture for machining aerospace aluminum alloy tubular castings according to claim 3, characterized in that: The other end of the rotating rod (31) is externally fixedly sleeved with a second worm gear (312). A second servo motor (313) is fixedly installed on one side of the mounting plate (3). The output shaft of the second servo motor (313) is fixedly installed with a second worm (314) through a coupling. The outer surface of the second worm (314) meshes with the tooth surface of the second worm gear (312).

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