Positioning and clamping device for machining of aircraft components

Abstract

This invention discloses a positioning and clamping device for machining aircraft parts, belonging to the technical field of parts processing equipment. The positioning and clamping device for machining aircraft parts includes a bracket, a clamping mechanism, and an angle adjustment mechanism for driving the clamping mechanism to rotate in a vertical plane. It also includes: a support part, comprising a support body with multiple vertically oriented sliding cavities, each cavity containing a slidably connected support rod, the top end of each support rod abutting the lower end face of the workpiece; and a lifting part, comprising a cylinder and a hydraulic piston, the hydraulic piston being slidably connected to the inner cavity of the cylinder, the support body being connected to the hydraulic piston, and the hydraulic piston having a fluid passage hole, one end of which communicates with the multiple sliding cavities, and the other end of which communicates with the inner cavity of the cylinder. This positioning and clamping device for machining aircraft parts, after adjusting the pitch angle of the workpiece, can prevent problems such as workpiece shaking, bending deformation, or displacement, ensuring workpiece machining accuracy.

Description

Technical Field

[0001] This invention relates to the field of parts processing equipment technology, and specifically to a positioning and clamping device for processing aircraft parts. Background Technology

[0002] An aircraft is composed of various parts, among which the fuselage frame, as the main load-bearing component, has a significant impact on the overall performance of the aircraft. The fuselage frame consists of many structural components, which require positioning and clamping devices for machining during the machining process. Many bulkheads used on aircraft have structures such as inclined surfaces and oblique holes; therefore, the pitch angle of the workpiece needs to be adjusted as needed according to the machining requirements during the machining process.

[0003] Chinese utility model patent CN 213225275 U discloses a mechanically automated machining flipping device, including a base, a motor, and an electric push rod. A transmission shaft is fixedly connected to the output shaft of the motor, and a clamping assembly is connected to the transmission shaft. A support assembly is connected to the base, and the support assembly consists of a support plate, a fixed column, and a lifting column. This device can support the workpiece after it has been flipped, thereby improving the machining accuracy of the workpiece.

[0004] However, the aforementioned clamping devices can only support the workpiece after it has been flipped over. They are not effective in supporting workpieces that require oblique holes or beveled surfaces on their upper surfaces. Furthermore, these clamping devices support the workpiece through a support plate, which has a limited contact range with the workpiece. This results in limited stability and reliability of the workpiece support, making the workpiece prone to shaking, bending, deformation, or displacement during processing, thus affecting the workpiece's processing accuracy. Summary of the Invention

[0005] The purpose of this invention is to overcome the problems in the prior art and provide a positioning and clamping device for machining aircraft parts. After the pitch angle of the workpiece is adjusted, it can provide multi-point support for the workpiece, thereby preventing the workpiece from shaking, bending, deforming or shifting when the vertical milling machine drills oblique holes or mills oblique surfaces on the upper surface of the workpiece, and ensuring the machining accuracy of the workpiece.

[0006] This invention provides a positioning and clamping device for machining aircraft parts, including a bracket, a clamping mechanism, and an angle adjustment mechanism for driving the clamping mechanism to rotate in a vertical plane, and further including:

[0007] A support part is provided below the clamping mechanism. The support part includes a support body, which has multiple vertical sliding cavities. A support rod is slidably connected in each sliding cavity, and the top end of each support rod abuts against the lower end face of the workpiece.

[0008] The lifting unit includes a cylinder and a hydraulic piston. The cylinder is connected to a bracket, and the hydraulic piston is slidably connected to the inner cavity of the cylinder. The support body is connected to the hydraulic piston. The hydraulic piston is provided with a fluid passage hole. One end of the fluid passage hole is connected to multiple sliding cavities, and the other end of the fluid passage hole is connected to the inner cavity of the cylinder. The inner cavity of the cylinder is connected to a hydraulic control circuit.

[0009] Preferably, the support body has a vertical sliding hole in the middle, the diameter of which is smaller than the diameter of the sliding cavity. A sliding rod is provided inside the sliding hole, and a plug is connected to the bottom end of the sliding rod. The plug is slidably connected to the sliding hole in a sealing manner. A limiting barrier is provided at the top of the sliding hole to prevent the plug from falling out of the sliding hole. The bottom end of the sliding hole is connected to the liquid passage hole, and the top end of the sliding rod abuts against the lower end face of the workpiece. When the sliding rod pushes the plug to the bottom end of the sliding hole, the plug blocks the connection between the liquid passage hole and the multiple sliding cavities.

[0010] Preferably, the upper end face of the support is parallel to the horizontal plane, each sliding cavity on the support has the same structure, and each support rod has the same structure. When the top end of the support rod on the left side of the slide rod is on the same plane as the upper end face of the support, and the bottom end of the support rod on the right side of the slide rod slides to the highest position in the sliding cavity, the plug can block the connection between the liquid passage hole and multiple sliding cavities.

[0011] Preferably, the top of the support rod is hinged to a top block, and the top of the top block has an arc-shaped surface.

[0012] Preferably, a hydraulic sensor is also provided between the cylinder and the hydraulic control circuit. The hydraulic sensor is used to detect the real-time hydraulic value of the cylinder's inner cavity. The hydraulic sensor is electrically connected to a controller, which is electrically connected to the hydraulic control circuit. The controller has a preset maximum hydraulic threshold. The controller compares the real-time hydraulic value with the maximum hydraulic threshold and controls the hydraulic control circuit to operate according to the comparison result so that the real-time hydraulic value of the cylinder's inner cavity is equal to the maximum hydraulic threshold.

[0013] Preferably, the angle adjustment mechanism includes a rotating shaft and a first power device. The rotating shaft is horizontally arranged and pivotally connected to the support shaft. One end of the rotating shaft is connected to the first power device, and the other end of the rotating shaft is connected to the clamping mechanism.

[0014] Preferably, the angle adjustment mechanism further includes a fork structure, with an arc-shaped slide rail between the two fork arms of the fork structure. The arc-shaped slide rail is vertically arranged, and the rotating shaft is parallel to the plane of the arc-shaped slide rail. The rotating shaft is pivotally connected to one fork arm of the fork structure. A sliding sleeve is provided on the bracket, and the arc-shaped slide rail is slidably connected inside the sliding sleeve. An arc-shaped rack is provided on the arc-shaped slide rail, and a second power device is toothed on the arc-shaped rack.

[0015] Preferably, the clamping mechanism includes a connecting sleeve, a threaded rod, a first clamping block, and a second clamping block. The connecting sleeve is coaxially arranged with the rotating shaft and pivotally connected to another fork arm of the fork structure. The first clamping block is connected to the rotating shaft. The connecting sleeve has an internal threaded hole, and the threaded rod is connected to the internal threaded hole. The second clamping block is fixedly connected to the threaded rod and is used to apply a clamping force toward the first clamping block to the workpiece.

[0016] Preferably, the cylinder body is pivotally connected to the support shaft, a connecting plate is connected to the cylinder body, the sliding sleeve is fixed to both sides of the connecting plate, and a gear is also provided outside the cylinder body, the gear is also geared to a third power device.

[0017] Preferably, the sliding cavity is provided with a wear-resistant coating.

[0018] Compared with the prior art, the beneficial effects of the present invention are: the positioning and clamping device for aircraft parts processing of the present invention can provide multi-point support for the lower end face of the workpiece after the pitch angle of the workpiece is adjusted, thereby improving the stability and reliability of the workpiece support, preventing the workpiece from shaking, bending deformation or displacement when drilling or milling inclined surfaces, and ensuring the accuracy of workpiece processing.

[0019] By using slide rods and stoppers, each slide cavity is isolated when each support rod abuts against the lower end face of the workpiece. The stoppers then maintain pressure in each cavity, ensuring a constant supporting force applied by each support rod to the workpiece. This prevents workpiece wobbling during processing and further guarantees machining accuracy. The support section of this device has a large support angle, allowing the entire clamping device to stably support workpieces with a wider range of pitch angles. Multiple support rods apply supporting force to the workpiece surface through their top blocks, enhancing the reliability of workpiece support and further improving workpiece stability and machining accuracy. A hydraulic sensor monitors the real-time hydraulic value of the cylinder's inner cavity, and a controller controls this value to prevent excessive pressure from the hydraulic piston on the support section, thus preventing workpiece deformation due to excessive support force and further ensuring machining accuracy. The arc-shaped slide rail allows the device's angle adjustment mechanism to adjust the workpiece's pitch angle in different directions, adapting to various machining needs and expanding the device's application range. The clamping mechanism of this device can ensure that the workpiece is always clamped when the angle adjustment mechanism adjusts the workpiece pitch angle. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2This is a schematic diagram of the structure in the first working state of the present invention;

[0022] Figure 3 This is a schematic diagram of the AA surface structure in the first working state of the present invention;

[0023] Figure 4 This is a schematic diagram of the AA surface structure in the second working state of the present invention;

[0024] Figure 5 This is a schematic diagram of the AA surface structure in the third working state of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the support part of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Workpiece, 101. Support, 102. Fork structure, 103. Arc-shaped slide rail, 104. Arc-shaped rack, 105. Sliding sleeve, 106. Second power unit, 107. Rotating shaft, 108. Connecting sleeve, 109. First power unit, 110. First clamping block, 2. Angle adjustment mechanism, 201. Support body, 202. Cylinder body, 203. Hydraulic piston, 3. Lifting part, 301. Fluid passage hole, 302. Top block, 303. Sliding cavity, 304. Support rod, 4. Support part, 401. Gear, 402. Third power unit, 403. Connecting plate, 5. Hydraulic sensor, 6. Clamping mechanism, 601. Threaded rod, 602. Second clamping block, 701. Sliding hole, 702. Sliding rod, 703. Plug. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-6 The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] like Figure 1-6As shown, the present invention provides a positioning and clamping device for machining aircraft parts, including a bracket 101, a clamping mechanism 6, and an angle adjustment mechanism 2 for driving the clamping mechanism 6 to rotate in a vertical plane. It also includes a support portion and a lifting portion 3. The support portion is located below the clamping mechanism 6. The support portion includes a support body 201, which has multiple vertical sliding cavities 303. Each sliding cavity 303 has a support rod 304 slidably connected within it, and the top end of each support rod 304 abuts against... The lifting part 3 includes a cylinder 202 and a hydraulic piston 203. The cylinder 202 is connected to the bracket 101. The hydraulic piston 203 is slidably connected to the inner cavity of the cylinder 202. The support body 201 is connected to the hydraulic piston 203. The hydraulic piston 203 is provided with a fluid passage hole 301. One end of the fluid passage hole 301 is connected to a plurality of sliding cavities 303. The other end of the fluid passage hole 301 is connected to the inner cavity of the cylinder 202. The inner cavity of the cylinder 202 is connected to a hydraulic control circuit.

[0030] The working principle of the above embodiments is briefly described below:

[0031] In use, the workpiece 1 to be processed is clamped onto the clamping mechanism 6, and the overall position of the device is adjusted so that workpiece 1 is below the milling machine. Then, the lifting unit 3 is controlled to rise, thereby driving the support unit 4 to rise. The support unit 4 applies a vertical supporting force to the workpiece 1 clamped on the clamping mechanism 6, thus resisting the feed force applied to the workpiece 1 by the milling machine's cutter head, preventing the workpiece 1 from bending, deforming, or shifting during processing. The upper surface of the workpiece 1 is processed using the milling machine's cutter head. After the upper surface of the workpiece 1 is processed, the milling machine's cutter head is reset, and the lifting unit 3 is controlled to descend, disengaging the support unit 4 from the workpiece 1. Then, the angle adjustment mechanism 2 is activated, driving the workpiece 1 to rotate in the vertical plane, thereby adjusting the pitch angle of the workpiece 1. After the pitch angle of workpiece 1 is adjusted, the lifting part 3 is raised, and the lifting part 3 drives the support part 4 to support workpiece 1 again. This allows the workpiece 1 to be effectively supported again when it is processed again after the pitch angle of workpiece 1 is adjusted. This resists the feed force applied to workpiece 1 by the milling machine cutter head, preventing workpiece 1 from shaking, bending, deforming or shifting during processing, thereby improving the processing accuracy of workpiece 1.

[0032] During this process, after the pitch angle of workpiece 1 is adjusted, there is a certain angle between the lower end face of workpiece 1 and the horizontal plane. Hydraulic oil is injected into the inner cavity of cylinder 202 through the hydraulic control circuit. The hydraulic oil in the inner cavity of cylinder 202 enters multiple sliding cavities 303 of support body 201 through the fluid passage 301, thereby squeezing the support rods 304 in each sliding cavity 303 upwards. When each support rod 304 moves to the top of the sliding cavity 303, the support rod 304 no longer moves relative to the sliding cavity 303. At this time, the hydraulic oil in the inner cavity of cylinder 202 pushes the hydraulic piston 203 upwards. The hydraulic piston 203 drives the support body 201 to move upwards, thereby driving multiple support rods 304 to move upwards until the support rods 304 abut against the lower end face of workpiece 1. The support rod 304 that first abuts against the lower end face of workpiece 1 will squeeze the hydraulic oil in the slide cavity 303 where it is located. This hydraulic oil flows back into the fluid passage 301, and then back into the inner cavity of the cylinder 202, until the hydraulic piston 203 pushes all the support rods 304 to abut against the lower end face of workpiece 1, and controls the hydraulic control circuit to stop supplying oil. At this time, by using multiple support rods 304 to provide multi-point support for the lower end face of workpiece 1 at the same time, the stability and reliability of the support for workpiece 1 can be improved, thereby further preventing workpiece 1 from shaking, bending, deforming or shifting during processing.

[0033] The positioning and clamping device for aircraft component machining of the present invention can support the workpiece 1 after the pitch angle of the workpiece 1 is adjusted. This prevents the workpiece 1 from shaking, bending, deforming, or shifting when the vertical milling machine drills inclined holes or mills inclined surfaces on the upper surface of the workpiece 1, ensuring the machining accuracy of the workpiece 1. Furthermore, this device utilizes multiple support rods 304 to simultaneously provide multi-point support to the lower end face of the workpiece 1, improving the stability and reliability of the support and further preventing the workpiece 1 from shaking, bending, deforming, or shifting during machining.

[0034] Based on the above embodiments, in order to prevent workpiece 1 from shaking during processing, thereby further ensuring the processing accuracy of workpiece 1.

[0035] like Figure 1-6 As shown, the support body 201 has a vertical sliding hole 701 in the middle. The diameter of the sliding hole 701 is smaller than the diameter of the sliding cavity 303. A sliding rod 702 is provided in the sliding hole 701. A plug 703 is connected to the bottom end of the sliding rod 702. The plug 703 is slidably connected to the sliding hole 701. A limiting barrier is provided at the top of the sliding hole 701 to prevent the plug 703 from coming out of the sliding hole 701. The bottom end of the sliding hole 701 is connected to the liquid passage hole 301. The top end of the sliding rod 702 abuts against the lower end face of the workpiece 1. When the sliding rod 702 pushes the plug 703 to the bottom end of the sliding hole 701, the plug 703 blocks the connection between the liquid passage hole 301 and the multiple sliding cavities 303.

[0036] During the support of workpiece 1, the hydraulic control circuit supplies hydraulic oil into the inner cavity of cylinder 202. The hydraulic oil enters the fluid passage 301 and then the sliding cavity 303 and sliding hole 701. Since the diameter of the sliding hole 701 is smaller than the diameter of the sliding cavity 303, the hydraulic oil first pushes the plug 703 upwards, thereby pushing the slide rod 702 upwards until the plug 703 contacts the limiting stop at the top of the sliding hole 701. Under the action of the limiting stop, the plug 703 and slide rod 702 stop rising. Then, the hydraulic oil in the sliding cavity 303 pushes the support rod 304 upwards until the support rod 304 reaches its highest position within the sliding cavity 303. During the upward movement of the support body 201 driven by the hydraulic piston 203, when the tops of the multiple support rods 304 abut against the lower end face of the workpiece 1, as the hydraulic piston 203 continues to drive the support body 201 upward, the workpiece 1 applies a downward squeezing force to the multiple support rods 304, thereby squeezing the hydraulic oil in the multiple sliding cavities 303 into the fluid passage hole 301 and flowing back into the inner cavity of the cylinder 202, until the top of the slide rod 702 abuts against the lower end face of the workpiece 1, the workpiece 1 applies a downward squeezing force to the slide rod 702, and the slide rod 702 drives the plug 703 to move downward relative to the sliding hole 701, until the plug 703 moves to the bottom of the sliding hole 701 and blocks the fluid passage hole 301. At this time, each slide cavity 303 is in an isolated state, and the support rod 304 cannot move downward relative to the slide cavity 303. At this time, under the action of the reaction force of the workpiece 1, the hydraulic piston 203 cannot continue to move upward. Thus, when multiple support rods 304 abut against the lower end face of the workpiece 1, the hydraulic control circuit automatically stops supplying oil to the entire support part. Furthermore, due to the blocking effect of the plug 703, each slide cavity 303 is in an isolated state. Since the hydraulic control circuit is not closed at this time, pressure is maintained on each slide cavity 303, thereby ensuring that the supporting force applied by each support rod 304 to the workpiece 1 is constant, preventing the workpiece 1 from shaking during processing, and further ensuring the processing accuracy of the workpiece 1.

[0037] As a preferred option, such as Figure 5 and 6As shown, the upper surface of the support 201 is parallel to the horizontal plane. Each sliding cavity 303 on the support 201 has the same structure, and each support rod 304 has the same structure. When the top end of the support rod 304 on the left side of the slide rod 702 is on the same plane as the upper surface of the support 201, and the bottom end of the support rod 304 on the right side of the slide rod 702 slides to the highest position within the sliding cavity 303, the plug 703 can block the communication between the liquid passage 301 and the multiple sliding cavities 303. This is achieved by setting each sliding cavity 303 and each slide rod 304 to have the same structure. The hydraulic control circuit controls the movement of the hydraulic piston 203, support rod 304, and slide rod 702, so that when the top of the support rod 304 on the left side of the slide rod 702 is on the same plane as the upper end surface of the support body 201, and the bottom of the support rod 304 on the right side of the slide rod 702 slides to the highest position in the slide cavity 303, the plug block 703 can block the connection between the liquid passage 301 and the multiple slide cavities 303, so that the entire support part has the maximum support angle, thereby enabling the entire clamping device to stably support the workpiece 1 with a wider range of pitch angles.

[0038] As a preferred option, such as Figure 1-6 As shown, a top block 302 is hinged to the top of the support rod 304, and the top of the top block 302 has an arc-shaped surface. By setting a top block 302 at the top of each support rod 304, and since the top block 302 is hinged to the top of the support rod 304 and has an arc-shaped surface at its top, multiple support rods 304 apply a supporting force to the surface of the workpiece 1 through the top blocks 302, which can improve the reliability of the support for the workpiece 1, further improve the stability of the workpiece 1 during processing, and improve the processing accuracy of the workpiece 1.

[0039] As a preferred option, such as Figure 1-6As shown, a hydraulic sensor 5 is also provided between the cylinder 202 and the hydraulic control circuit. The hydraulic sensor 5 is used to detect the real-time hydraulic value of the inner cavity of the cylinder 202. The hydraulic sensor 5 is electrically connected to a controller, which is electrically connected to the hydraulic control circuit. The controller has a preset maximum hydraulic threshold. The controller compares the real-time hydraulic value with the maximum hydraulic threshold. The controller controls the hydraulic control circuit to operate according to the comparison result so that the real-time hydraulic value of the inner cavity of the cylinder 202 is equal to the maximum hydraulic threshold. After the plug 703 blocks the fluid passage 301, the real-time hydraulic value inside the cylinder 202 increases. The hydraulic sensor 5 detects the real-time hydraulic value inside the cylinder 202. When the real-time hydraulic value inside the cylinder 202 rises to the highest hydraulic threshold, the controller controls the hydraulic control circuit to close, thereby keeping the hydraulic value inside the cylinder 202 at the highest hydraulic threshold. This prevents the hydraulic piston 203 from applying excessive pressure to the support part 4, which would cause the multiple support rods 304 to apply excessive support force to the workpiece 1. This prevents the workpiece 1 from deforming due to excessive support force, and further ensures the machining accuracy of the workpiece 1.

[0040] As a preferred option, such as Figure 2 As shown, the angle adjustment mechanism 2 includes a rotating shaft 107 and a first power device 109. The rotating shaft 107 is horizontally positioned and pivotally connected to the support 101. One end of the rotating shaft 107 is connected to the first power device 109, and the other end is connected to the clamping mechanism 6. When adjusting the pitch angle of the workpiece 1, the first power device 109 is controlled to rotate, driving the rotating shaft 107 to rotate, thereby driving the clamping mechanism 6 to rotate in the vertical plane, thus adjusting the pitch angle of the workpiece 1. When adjusting the pitch angle of the workpiece 1, the angle adjustment mechanism 2 of this device allows the clamping mechanism 6 to rotate with the workpiece 1, ensuring that the clamping mechanism 6 always clamps the workpiece 1 during the pitch angle adjustment process. This avoids repeated positioning errors caused by repeated clamping of the workpiece 1, further ensuring the machining accuracy of the workpiece 1.

[0041] As a preferred option, such as Figure 1-5As shown, the angle adjustment mechanism 2 further includes a fork structure 102. An arc-shaped slide rail 103 is provided between the two fork arms of the fork structure 102. The arc-shaped slide rail 103 is vertically arranged. The rotating shaft 107 is parallel to the plane where the arc-shaped slide rail 103 is located. The rotating shaft 107 is pivotally connected to one fork arm of the fork structure 102. A sliding sleeve 105 is provided on the bracket 101. The arc-shaped slide rail 103 is slidably connected in the sliding sleeve 105. An arc-shaped rack 104 is provided on the arc-shaped slide rail 103. A second power device 106 is toothed on the arc-shaped rack 104. By setting an arc-shaped slide rail 103, the second power device 106 drives the arc-shaped slide rail 103 to slide within the sliding sleeve 105 via an arc-shaped rack 104. Since the rotating shaft 107 is parallel to the plane containing the arc-shaped slide rail 103, the fork arm rotates in a vertical plane under the drive of the arc-shaped slide rail 103, and the vertical plane containing the rotation direction of the fork arm is perpendicular to the vertical plane containing the rotation direction of the rotating shaft 107. Through the arc-shaped slide rail 103, the angle adjustment mechanism 2 of this device can adjust the pitch angle of the workpiece 1 in different directions, thereby adapting to more processing needs and expanding the application range of this device.

[0042] As a preferred option, such as Figure 2 As shown, the clamping mechanism 6 includes a connecting sleeve 108, a threaded rod 601, a first clamping block 110, and a second clamping block 602. The connecting sleeve 108 is coaxially arranged with the rotating shaft 107 and is pivotally connected to another fork arm of the fork structure 102. The first clamping block 110 is connected to the rotating shaft 107. The connecting sleeve 108 is provided with an internal threaded hole, and the threaded rod 601 is connected to the internal threaded hole. The second clamping block 602 is fixedly connected to the threaded rod 601 and is used to apply a clamping force toward the first clamping block 110 to the workpiece 1. The connecting sleeve 108 is pivotally connected to another fork arm of the fork structure 102 via an angular contact ball bearing or a tapered roller bearing. By rotating the threaded rod 601, the threaded rod 601 rotates relative to the connecting sleeve 108. Under the action of the internal threaded hole, the position of the second clamping block 602 relative to the first clamping block 110 is adjusted, thereby clamping or releasing the workpiece 1. Since the thread has a self-locking function, it can ensure the reliability of the clamping mechanism 6 in clamping the workpiece 1, thereby ensuring the machining accuracy of the workpiece 1. Furthermore, since the clamping mechanism 6 is connected to the connecting sleeve 108, and the connecting sleeve 108 is coaxially arranged with the rotating shaft 107, when the rotating shaft 107 drives the first clamping block 110 to rotate, thereby driving the workpiece 1 to rotate, the second clamping block 602 can also rotate with it. Therefore, when the angle adjustment mechanism 2 adjusts the pitch angle of the workpiece 1, it can ensure that the workpiece 1 is always in a clamped state.

[0043] As a preferred option, such as Figure 1-6As shown, the cylinder 202 is pivotally connected to the bracket 101. A gear 401 is also provided outside the cylinder 202, and the gear 401 is also meshed with a third power device 402. By providing the gear 401, the third power device 402 drives the cylinder 202 to rotate in the horizontal plane, thereby driving the connecting plate 403 to rotate, which in turn drives the sliding sleeve 105 to rotate, thus driving the entire fork structure 102 to rotate, and ultimately driving the workpiece 1 to rotate in the horizontal plane. This enhances the functionality and expands the applicability of the device.

[0044] As a preferred option, such as Figure 6 As shown, the sliding cavity 303 is provided with a wear-resistant coating. By providing a wear-resistant coating inside the sliding cavity 303, the wear resistance of the sliding cavity 303 can be improved, thereby increasing the service life of the entire device.

[0045] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning and clamping device for machining aircraft parts, comprising a bracket (101), a clamping mechanism (6), and an angle adjustment mechanism (2) for driving the clamping mechanism (6) to rotate in a vertical plane, characterized in that, Also includes: A support part is provided below the clamping mechanism (6). The support part includes a support body (201). The support body (201) is provided with multiple vertical sliding cavities (303). A support rod (304) is slidably connected in each sliding cavity (303). The top end of each support rod (304) abuts against the lower end face of the workpiece (1). The lifting unit (3) includes a cylinder (202) and a hydraulic piston (203). The cylinder (202) is connected to the bracket (101). The hydraulic piston (203) is slidably connected to the inner cavity of the cylinder (202). The support body (201) is connected to the hydraulic piston (203). The hydraulic piston (203) is provided with a liquid passage hole (301). One end of the liquid passage hole (301) is connected to multiple sliding cavities (303). The other end of the liquid passage hole (301) is connected to the inner cavity of the cylinder (202). The inner cavity of the cylinder (202) is connected to a hydraulic control circuit. The support (201) has a vertical sliding hole (701) in the middle. The diameter of the sliding hole (701) is smaller than the diameter of the sliding cavity (303). A sliding rod (702) is provided in the sliding hole (701). A plug (703) is connected to the bottom end of the sliding rod (702). The plug (703) is slidably connected to the sliding hole (701). A limiting barrier is provided at the top of the sliding hole (701). The limiting barrier is used to prevent the plug (703) from coming out of the sliding hole (701). The bottom end of the sliding hole (701) is connected to the liquid passage hole (301). The top end of the sliding rod (702) abuts against the lower end face of the workpiece (1). When the sliding rod (702) pushes the plug (703) to the bottom end of the sliding hole (701), the plug (703) blocks the connection between the liquid passage hole (301) and the multiple sliding cavities (303). The upper surface of the support (201) is parallel to the horizontal plane. Each sliding cavity (303) on the support (201) has the same structure, and each support rod (304) has the same structure. When the top of the support rod (304) on the left side of the slide rod (702) is on the same plane as the upper surface of the support (201), and the bottom of the support rod (304) on the right side of the slide rod (702) slides to the highest position in the sliding cavity (303), the plug (703) can block the connection between the liquid passage (301) and the multiple sliding cavities (303).

2. The positioning and clamping device for machining aircraft parts as described in claim 1, characterized in that, The top of the support rod (304) is hinged to a top block (302), and the top of the top block (302) has an arc-shaped surface.

3. The positioning and clamping device for machining aircraft parts as described in claim 1, characterized in that, A hydraulic sensor (5) is also provided between the cylinder (202) and the hydraulic control circuit. The hydraulic sensor (5) is used to detect the real-time hydraulic value of the inner cavity of the cylinder (202). The hydraulic sensor (5) is electrically connected to a controller. The controller is electrically connected to the hydraulic control circuit. The controller has a preset maximum hydraulic threshold. The controller compares the real-time hydraulic value with the maximum hydraulic threshold. The controller controls the hydraulic control circuit to operate according to the comparison result so that the real-time hydraulic value of the inner cavity of the cylinder (202) is equal to the maximum hydraulic threshold.

4. The positioning and clamping device for machining aircraft parts as described in claim 1, characterized in that, The angle adjustment mechanism (2) includes a rotating shaft (107) and a first power device (109). The rotating shaft (107) is horizontally arranged and pivotally connected to the support (101). One end of the rotating shaft (107) is connected to the first power device (109), and the other end of the rotating shaft (107) is connected to the clamping mechanism (6).

5. The positioning and clamping device for machining aircraft parts as described in claim 4, characterized in that, The angle adjustment mechanism (2) further includes a fork structure (102), with an arc-shaped slide rail (103) between the two fork arms of the fork structure (102). The arc-shaped slide rail (103) is vertically arranged, and the rotating shaft (107) is parallel to the plane of the arc-shaped slide rail (103). The rotating shaft (107) is pivotally connected to one fork arm of the fork structure (102). The bracket (101) is provided with a sliding sleeve (105), and the arc-shaped slide rail (103) is slidably connected in the sliding sleeve (105). The arc-shaped slide rail (103) is provided with an arc-shaped rack (104), and a second power device (106) is toothed on the arc-shaped rack (104).

6. The positioning and clamping device for machining aircraft parts as described in claim 1, characterized in that, in, The clamping mechanism (6) includes a connecting sleeve (108), a threaded rod (601), a first clamping block (110), and a second clamping block (602). The connecting sleeve (108) is coaxially arranged with the rotating shaft (107). The connecting sleeve (108) is pivotally connected to another fork arm of the fork structure (102). The first clamping block (110) is connected to the rotating shaft (107). The connecting sleeve (108) is provided with an internal threaded hole. The threaded rod (601) is connected to the internal threaded hole. The second clamping block (602) is fixedly connected to the threaded rod (601). The second clamping block (602) is used to apply a clamping force toward the first clamping block (110) to the workpiece (1).

7. The positioning and clamping device for machining aircraft parts as described in claim 6, characterized in that, The cylinder (202) is pivotally connected to the bracket (101), and a connecting plate (403) is connected to the cylinder (202). The sliding sleeve (105) is fixed to both sides of the connecting plate (403). A gear (401) is also provided outside the cylinder (202), and the gear (401) is also connected to a third power device (402).

8. The positioning and clamping device for machining aircraft parts as described in claim 1, characterized in that, The sliding cavity (303) is provided with a wear-resistant coating.

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