Workpiece fixing and supporting device for aerospace metal shell processing

Abstract

The utility model relates to the technical field of aerospace metal, and disclose a kind of workpiece fixed support device for aerospace metal shell processing, including base, the top of base is fixedly installed with support piece, the top of support piece is fixedly installed with cross bar, the both ends of one side of cross bar are equipped with shell, the side of shell is arrayed and is equipped with contact head, one end of contact head is fixedly installed with the slide bar that is penetrated to shell interior, the surface of slide bar is sleeved with air bag, the recessed and protruding structure of workpiece surface can be made by the setting of contact head spring is compressed, contact head can be retracted along axial direction, so that contact head self-adapting is attached curved surface. When the contact head of array distribution is all contacted with workpiece surface, form multiple-point flexible support network, ensure that each part of workpiece is accurately positioned, and the contact head of array distribution can be independently telescopic, adapt to the ups and downs of workpiece surface, compared with traditional rigid fixture, the efficiency of adaptation is effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of aerospace metal technology, and specifically relates to a workpiece fixing support device for processing aerospace metal shells. Background Technology

[0002] Aerospace metal shells, such as titanium alloy engine casings and aluminum alloy spacecraft skins, are characterized by high precision, thin walls, and complex structures (wall thickness is usually 1-5mm, and form and position tolerance is ≤0.05mm). Their processing requires multiple steps such as milling, drilling, and welding. The stability and adjustability of the workpiece fixing support directly affect the processing quality and efficiency.

[0003] In existing technologies, rigid clamps such as vises and pressure plates are typically used to fix and support metal shells, which presents the following stress concentration problems: The clamping force on thin-walled parts is prone to deformation, resulting in dimensional deviations after machining; and the applicability is poor: a single clamp is only suitable for workpieces of a specific shape, and the entire clamp must be disassembled when changing products, resulting in long changeover times and low processing efficiency. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a workpiece fixing and support device for aerospace metal shell processing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a workpiece fixing support device for aerospace metal shell processing, comprising a base, a support member fixedly installed on the top of the base, a crossbar fixedly installed on the top of the support member, a shell provided at both ends of one side of the crossbar, contact heads arranged in an array on one side of the shell, a sliding rod fixedly installed at one end of the contact head penetrating into the shell, an air bladder sleeved on the surface of the sliding rod, a connecting pipe connecting two adjacent air bladders to each other, a screw rotatably connected to the inside of the crossbar through a bearing, threaded blocks fixedly connected to the shell at both ends of the surface of the screw, and a bevel gear fixedly sleeved on the surface of the screw.

[0006] Preferably, the slide rod and the outer shell are slidably connected to each other, and the central airbag located at the top of the inner shell is connected to a pipe that extends through to the top of the outer shell.

[0007] Preferably, a vacuum pump is provided on the top of the housing, the air inlet of the vacuum pump is connected to the pipe, and a fixing device is fixedly sleeved on the surface of the vacuum pump and fixedly connected to the top of the housing.

[0008] Preferably, both ends of the airbag are connected to sliding sealing rings that are sleeved on the surface of the slide rod, and the sliding sealing rings and the slide rod are slidably connected to each other.

[0009] Preferably, a connecting plate is fixedly installed at one end of the slide rod, and a spring that is fixedly connected to the inside of the outer casing is fixedly installed on one side of the connecting plate.

[0010] Preferably, the top and bottom of the threaded block are fixedly installed with sliders, and the inside of the crossbar is provided with a groove for sliding with the sliders.

[0011] Preferably, a second bevel gear meshes with the surface of the first bevel gear, and a shaft extending through to the other side of the crossbar is fixedly sleeved inside the second bevel gear.

[0012] Preferably, a fixing plate is fixedly installed on the other side of the crossbar, and a rotating motor is fixedly installed on the top of the fixing plate. The output end of the rotating motor is fixedly connected to the shaft through a coupling.

[0013] In summary, this utility model has the following beneficial effects:

[0014] 1. In use, this utility model involves placing a metal workpiece between two housings and then operating a rotating motor. The motor drives the shaft and bevel gear two to rotate, which in turn drives bevel gear one and the screw to rotate. The screw's rotation is achieved through the reverse thread design at both ends, allowing the two threaded blocks to move in opposite directions. This design expands the device's adaptability to metal workpieces of different sizes, ensuring its flexibility of use.

[0015] 2. In this invention, the contact head allows the uneven structure of the workpiece surface to compress the spring, and the contact head can retract axially, enabling it to adaptively conform to the curved surface. When all the arrayed contact heads are in contact with the workpiece surface, a multi-point flexible support network is formed, ensuring precise positioning of all parts of the workpiece. Furthermore, the arrayed contact heads can extend and retract independently to adapt to the undulations of the workpiece surface, effectively improving the fitting efficiency compared to traditional rigid fixtures.

[0016] 3. This utility model solves the problems of difficult clamping and low precision caused by the complex structure of aerospace metal shells through the innovative design of the contact head and the self-adaptive negative pressure airbag locking mechanism, while also possessing the advantages of flexible adaptation and rigid support. Its efficient clamping process, positioning accuracy, and vibration resistance significantly improve the processing quality and production efficiency of high-end equipment manufacturing, and it is suitable for processing various types of aerospace parts. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is an exploded view of the crossbar and support components of this utility model;

[0019] Figure 3 This is an enlarged schematic diagram of the screw and housing of this utility model in use.

[0020] Figure 4 This is an enlarged schematic diagram showing the contact head, slide bar, and vacuum pump used in conjunction with this utility model.

[0021] Reference numerals in the attached drawings: 1. Base; 101. Support; 102. Crossbar; 2. Housing; 201. Contact head; 202. Slide rod; 203. Airbag; 204. Connecting plate; 205. Sliding sealing ring; 206. Spring; 207. Connecting pipe; 208. Pipe; 3. Vacuum pump; 301. Fixing ring; 4. Screw; 401. Threaded block; 402. Slider; 403. Bevel gear one; 404. Bevel gear two; 405. Shaft; 406. Rotating motor; 407. Fixing plate; 408. Slide groove. Detailed Implementation

[0022] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0023] The specific embodiments of this utility model are described below with reference to the accompanying drawings:

[0024] refer to Figures 1-4A workpiece fixing support device for aerospace metal shell processing includes a base 1, a support member 101 fixedly installed on the top of the base 1, a crossbar 102 fixedly installed on the top of the support member 101, a shell 2 at both ends of one side of the crossbar 102, contact heads 201 arranged in an array on one side of the shell 2, a slide rod 202 fixedly installed at one end of the contact head 201 and extending into the shell 2, an air bladder 203 sleeved on the surface of the slide rod 202, a connecting pipe 207 connecting two adjacent air bladders 203 to each other, a screw 4 rotatably connected to the inside of the crossbar 102 through a bearing, threaded blocks 401 fixedly connected to the shell 2 at both ends of the surface of the screw 4, and a bevel gear fixedly sleeved on the surface of the screw 4. In this invention, the contact head 201 can be arranged so that the concave and convex structure of the workpiece surface pushes the contact head 201 to compress the spring 206, and the contact head 201 can retract axially, so that the contact head 201 adaptively conforms to the curved surface. When all the arrayed contact heads 201 are in contact with the workpiece surface, a multi-point flexible support network is formed, ensuring precise positioning of all parts of the workpiece. Furthermore, the arrayed contact heads 201 can extend and retract independently to adapt to the unevenness of the workpiece surface, effectively improving the fitting efficiency compared to traditional rigid clamps. Through the innovative design of the contact heads 201 and the self-adaptive negative pressure airbag 203 locking mechanism, the problems of difficult clamping and low precision caused by the complex structure of aerospace metal shells are solved, combining the advantages of flexible adaptation and rigid support. Its efficient clamping process, positioning accuracy, and vibration resistance significantly improve the processing quality and production efficiency of high-end equipment manufacturing, making it suitable for processing various types of aerospace components.

[0025] The slide bar 202 is slidably connected to the outer shell 2. The central airbag 203 located at the top of the outer shell 2 is connected to a pipe 208 that runs through to the top of the outer shell 2. The sliding connection allows the slide bar 202 to slide smoothly inside the outer shell 2. The pipe 208 will cooperate with the airbag 203 to adjust the positive and negative air pressure.

[0026] A vacuum pump 3 is provided on the top of the outer casing 2. The air inlet of the vacuum pump 3 is connected to the pipe 208. A fixing ring 301 is fixedly sleeved on the surface of the vacuum pump 3 and fixedly connected to the top of the outer casing 2. The operation of the vacuum pump 3 will adjust the positive and negative air extraction inside the pipe 208. The fixing ring 301 will cooperate with the vacuum pump 3 for support and fixation.

[0027] Both ends of the airbag 203 are connected to a sliding sealing ring 205 that is sleeved on the surface of the slide rod 202. The sliding sealing ring 205 and the slide rod 202 are slidably connected to each other. The sliding sealing ring 205 can ensure the seal between the airbag 203 and the slide rod 202, while also ensuring low friction between them, so that the slide rod 202 can slide smoothly inside the sliding sealing ring 205.

[0028] A connecting plate 204 is fixedly installed at one end of the slide rod 202. A spring 206, which is fixedly connected to the inside of the outer casing 2, is fixedly installed on one side of the connecting plate 204. The movement of the slide rod 202 will drive the connecting plate 204 to move, thereby causing the spring 206 to contract and extend.

[0029] The top and bottom of the threaded block 401 are fixedly installed with sliders 402. The inside of the crossbar 102 is provided with a groove 408 for sliding with the slider 402. The sliding connection between the slider 402 and the groove 408 will cooperate with the threaded block 401 to realize the movement guidance inside the crossbar 102.

[0030] The surface of bevel gear 403 meshes with bevel gear 404. Inside bevel gear 404, a shaft 405 is fixedly sleeved, extending to the other side of crossbar 102. The rotation of shaft 405 will drive bevel gear 404 to rotate, thereby realizing the rotation of bevel gear 403.

[0031] A fixing plate 407 is fixedly installed on the other side of the crossbar 102. A rotating motor 406 is fixedly installed on the top of the fixing plate 407. The output end of the rotating motor 406 is fixedly connected to the shaft 405 through a coupling. The fixing plate 407 will support and fix the rotating motor 406. The operation of the rotating motor 406 will drive the shaft 405 to rotate.

[0032] Brief description of usage: In the initial state of use, the airbag 203 is under positive pressure. A metal workpiece is placed between the two outer shells 2, and then the rotating motor 406 is activated. The operation of the rotating motor 406 drives the shaft 405 and the second bevel gear 404 to rotate. At this time, the second bevel gear 404 drives the first bevel gear 403 and the screw 4 to rotate. The rotation of the screw 4 achieves the reverse movement of the two threaded blocks 401 through the reverse thread design at both ends. At this time, the outer shells 2 approach each other and contact the workpiece surface. The irregular shape of the workpiece surface causes the contact head 201 to be compressed during contact, causing the spring 206 to contract. After the arrayed contact heads 201 have successively contacted and engaged with parts of different unevenness, the vacuum pump 3 is activated. The operation of the vacuum pump 3 creates negative pressure to extract air from inside the airbag 203 through the pipe 208 and connecting pipe 207. The airbag 203 will compress the surface of the slide bar 202, causing the slide bar 202 to be limited and fixed inside the airbag 203. At this time, the workpiece can be clamped and fixed by the fixed support device, which facilitates the subsequent processing operation of the workpiece. When it is necessary to disassemble the workpiece, the workpiece can be removed by reverse extraction by the vacuum pump 3 to create positive pressure inside the airbag 203, and then moving the two outer shells 2 away.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A workpiece fixing support device for aerospace metal shell processing, comprising a base (1), characterized in that: A support member (101) is fixedly installed on the top of the base (1). A contact head (201) is arranged in an array on one side of the support member (101). A rod (102) is fixed at one end of the contact head (201). Both ends of one side of the crossbar (102) are provided with a shell (2). A slide rod (202) is installed in the shell (2) and penetrates into the shell (2). An air bladder (203) is sleeved on the surface of the slide rod (202). A connecting tube (207) is connected between two adjacent air bladders (203). A screw (4) is rotatably connected to the inside of the crossbar (102) through a bearing. Both ends of the surface of the screw (4) are threadedly connected to a threaded block (401) that is fixedly connected to the shell (2). A bevel gear (403) is fixedly sleeved on the surface of the screw (4).

2. The workpiece fixing and support device for aerospace metal shell processing according to claim 1, characterized in that: The slide bar (202) is slidably connected to the outer shell (2), and the central airbag (203) located at the top of the inner shell (2) is connected to a pipe (208) that extends through to the top of the outer shell (2).

3. The workpiece fixing and support device for aerospace metal shell processing according to claim 2, characterized in that: The top of the outer shell (2) is provided with a vacuum pump (3), the air inlet of the vacuum pump (3) is connected to the pipe (208), and a fixing ring (301) is fixedly sleeved on the surface of the vacuum pump (3) and fixedly connected to the top of the outer shell (2).

4. The workpiece fixing and support device for aerospace metal shell processing according to claim 1, characterized in that: Both ends of the airbag (203) are connected to a sliding sealing ring (205) sleeved on the surface of the slide rod (202), and the sliding sealing ring (205) and the slide rod (202) are slidably connected to each other.

5. The workpiece fixing and support device for aerospace metal shell processing according to claim 1, characterized in that: A connecting plate (204) is fixedly installed at one end of the slide rod (202), and a spring (206) that is fixedly connected to the inside of the outer shell (2) is fixedly installed on one side of the connecting plate (204).

6. The workpiece fixing and support device for aerospace metal shell processing according to claim 1, characterized in that: The top and bottom of the threaded block (401) are both fixedly installed with sliders (402), and the inside of the crossbar (102) is provided with a groove (408) for sliding with the sliders (402).

7. The workpiece fixing and support device for aerospace metal shell processing according to claim 1, characterized in that: The surface of the first bevel gear (403) is meshed with the second bevel gear (404), and the inside of the second bevel gear (404) is fixedly sleeved with a shaft (405) that extends to the other side of the crossbar (102).

8. The workpiece fixing and support device for aerospace metal shell processing according to claim 7, characterized in that: A fixing plate (407) is fixedly installed on the other side of the crossbar (102), and a rotating motor (406) is fixedly installed on the top of the fixing plate (407). The output end of the rotating motor (406) is fixedly connected to the shaft (405) through a coupling.

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