Drilling and boring clamp for three-dimensional woven thrust paddle assembly part

Abstract

The utility model provides a drilling and boring clamp for a three-dimensional woven thrust paddle assembly part. The clamp comprises a bottom plate support, a plurality of boring holes and a plurality of boring holes, the pressing supporting seat is arranged on the bottom plate supporting seat, the pressing supporting seat is used for pressing a root sleeve of a three-dimensional woven thrust paddle blade, and the pressing supporting seat is matched with the root sleeve; the molded surface supporting seat is arranged on the bottom plate supporting seat, the molded surface supporting seat is used for supporting the three-dimensional woven thrust paddle blade, and the molded surface supporting seat is matched with the molded surface of the three-dimensional woven thrust paddle blade; according to the tool, the pressing device and the positioning device are ingeniously separated, meanwhile, the posture of the part is adjusted and corrected twice, and the problems that in the clamping process of the irregular curved surface paddle, the part is difficult to position and clamp, and deformation is likely to happen are solved through the specific profile design.

Description

Technical Field

[0001] This application belongs to the field of tooling and fixture technology, and in particular relates to a drilling and boring fixture for a three-dimensional braided thrust propeller blade assembly. Background Technology

[0002] The three-dimensional braided thrust rotor blade assembly is an important part of the tail thrust rotor blade of a certain high-speed helicopter. It consists of composite blades and root sleeves that are injection molded together. The composite part adopts three-dimensional braiding, and the root sleeve is machined from titanium alloy. The value of a single piece is extremely high.

[0003] The composite material of this assembly is an irregular continuous curved surface, and the root sleeve is an elliptical curved surface. There is no stable and quick clamping and straightening to align the position, which requires extremely high operator skills. During the clamping process, it comes into contact with the conventional pressure plate in the form of points or lines, which makes it very easy to deform. In addition, the machining positions of this part are distributed on different planes, and the positional and dimensional accuracy requirements are high, making it extremely difficult to process. Utility Model Content

[0004] Purpose of the application: To solve the problems of lack of a plane for clamping the blade assembly of a three-dimensional braided thruster, difficulty in controlling the posture of the parts during clamping, and difficulty in establishing a coordinate system, while reducing the deformation generated during the clamping process, ensuring the required dimensional and positional accuracy of the parts, and improving the efficiency of the clamping and straightening of the machining coordinate system.

[0005] This application provides a drilling and boring fixture for a three-dimensional braided thrust propeller blade assembly, the fixture comprising:

[0006] Base plate support;

[0007] A clamping support is provided on the base plate support. The clamping support is used to clamp the root sleeve of the three-dimensional braided thrust propeller blade. The clamping support is adapted to the root sleeve.

[0008] A profile support base is provided on the base plate support. The profile support base is used to support the blades of the three-dimensional woven thrust propeller. The profile support base is adapted to the profile of the blades of the three-dimensional woven thrust propeller.

[0009] Preferably, the clamp further includes:

[0010] The positioning plate has mounting holes and is used to straighten and align the blades of the three-dimensional woven thrust propeller to achieve precise positioning.

[0011] A positioning stud is provided in the mounting hole, and the positioning stud is connected to the internal thread of the root sleeve of the three-dimensional braided thrust propeller blade.

[0012] A diamond-shaped positioning pin is provided on the positioning plate, and the diamond-shaped positioning pin can be inserted into the double-hole insertion port at the root of the three-dimensional woven thrust propeller blade.

[0013] Preferably, the clamp further includes:

[0014] A clamping screw, one end of which is connected to the clamping support base;

[0015] A profiled clamping block is connected to the other end of the clamping screw;

[0016] The profiled clamping block and the clamping support form a space for installing the root sleeve of the three-dimensional woven thrust propeller blade.

[0017] Preferably, the clamp further includes:

[0018] A clamping nut is used to lock the profile clamping block.

[0019] Preferably, the profile support is a support plate adapted to the profile of the three-dimensional woven thrust propeller blade.

[0020] Preferably, the profiled clamping block is adapted to the root sleeve.

[0021] The beneficial technical effects of this application are as follows:

[0022] The tooling in this application cleverly separates the pressing device and the positioning device, and adjusts and calibrates the part's posture twice. Through a specific surface design, it solves the problems of difficult part positioning, clamping, and easy deformation during the clamping of irregular curved blades. It adopts a special support base that fits the blade and sleeve to quickly complete the coarse positioning of the part's posture. Then, it uses positioning plates, positioning studs, and diamond positioning pins to fine-tune the part's posture, keeping the clamping error within a very small range, ensuring the machining accuracy of the part, and greatly reducing the time for clamping, straightening, and aligning the part, thus improving production efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the three-dimensional woven thrust propeller blade assembly provided in the embodiments of this application;

[0024] Figure 2 This is a schematic diagram of the fixture structure provided in the embodiments of this application;

[0025] Figure 3 The fixture provided in this application embodiment is used Figure 1 ;

[0026] Figure 4 The fixture provided in this application embodiment is used Figure 2 . Detailed Implementation

[0027] Please see Figure 1 The left end of the part provided in this application is a root sleeve made of titanium alloy. The outer cylinder of the sleeve is an elliptical curved surface, the inner hole has internal threads, and the fork has a pair of shoulder bushings. The right end is a composite blade part, which is an irregular continuous twisted curved surface. The machining part mainly involves boring and milling the end face of the shoulder bushing A of the root sleeve at the left end, milling the plane of the oil injection hole B and drilling the bottom hole of the oil injection hole B, and milling the end face C of the root sleeve to make up the allowance.

[0028] Please see Figure 2 The application provides a profile support 1, a base plate support 2, a clamping support 3, a clamping screw 4, a profile clamping block 5, a clamping nut 6, a diamond-shaped positioning pin 7, a positioning stud 8, and a positioning plate 9. The base plate support 2 is fixed to the machine tool worktable by a pressure plate. The profile support 1 and the clamping support 3 are fixed to a specific distance from the base plate support 2 by bolts. The clamping screw 4 is connected to one side of the clamping support 3 and the profile clamping block 5. The part is placed on the profile support 1 and the clamping support 3, the root sleeve is placed on the clamping support 3, and the composite blade part is placed on the profile support 1. The profile clamping block 5 is then used to press down the root sleeve of the part. The clamping nut 6 is tightened, but not completely. This completes the initial positioning of the part. The positioning stud 8 is screwed into the threaded hole of the root sleeve. The positioning plate 9 is placed on the positioning stud 8. The diamond positioning pin 7 is inserted through the positioning plate 9 into the shoulder bushing hole. The positioning plate is straightened, the part posture is adjusted, and the coordinate system is set. The positioning plate 9, the positioning stud 8, and the diamond positioning pin 7 are removed. Finally, the program is called to complete the machining of the part bushing hole, oil injection hole, and end face.

[0029] Please see Figure 3 The clamping scheme provided in this application involves placing the part parallel to the axis on the worktable, with oil injection holes evenly distributed on the left and right sides, facilitating one-time clamping and processing on a vertical five-axis CNC machine tool. The root sleeve of the part is placed at the clamping support 3, and the composite blade part is placed at the profile support 1, suspending the part for easy processing. The profile clamping block 5 is pressed against the root sleeve of the part by the clamping screw 4 and the clamping nut 6. The clamping nut 6 is slightly tightened, and the positioning stud 8 is screwed into the internal thread of the root sleeve. The positioning plate 9 is embedded into the smooth part of the positioning stud 8. The diamond positioning pin 7 is inserted through the positioning plate 9 into the hole of the shoulder bushing 7 at the fork of the root sleeve. Then, the positioning plate 9 is straightened to adjust the posture of the part. After aligning the coordinate system, the clamping nut 6 is tightened.

[0030] Please see Figure 4 The fixture provided in this application removes the positioning plate 9, positioning stud 8 and diamond positioning pin 7, and finally calls the program to complete the machining of the part bushing hole, oil injection hole and end face.

[0031] Unlike conventional fixtures, the tooling in this application cleverly separates the pressing device and the positioning device, and simultaneously adjusts and calibrates the part's posture twice. Through a specific adaptable surface design, it solves the problems of difficult part positioning, clamping, and easy deformation during the clamping of irregular curved blades. It adopts a special support base that fits the blade and sleeve to quickly complete the coarse positioning of the part's posture, and then uses a positioning plate, positioning studs, and diamond positioning pins to accurately position the part's posture, so that the clamping error is controlled within a very small range, ensuring the machining accuracy of the part, while greatly reducing the time for clamping, straightening, and aligning the part, thus improving production efficiency.

Claims

1. A drilling and boring fixture for a three-dimensional woven thrust propeller blade assembly, characterized in that, The clamp includes: Base plate support; A clamping support is provided on the base plate support. The clamping support is used to clamp the root sleeve of the three-dimensional braided thrust propeller blade. The clamping support is adapted to the root sleeve. A profile support base is provided on the base plate support. The profile support base is used to support the blades of the three-dimensional woven thrust propeller. The profile support base is adapted to the profile of the blades of the three-dimensional woven thrust propeller.

2. The clamp according to claim 1, characterized in that, The clamp also includes: The positioning plate has mounting holes and is used to straighten and align the blades of the three-dimensional woven thrust propeller to achieve precise positioning. A positioning stud is provided in the mounting hole, and the positioning stud is threadedly connected to the root sleeve of the three-dimensional braided thrust propeller blade. A diamond-shaped positioning pin is provided on the positioning plate, and the diamond-shaped positioning pin can be inserted into the double-hole insertion port at the root of the three-dimensional woven thrust propeller blade.

3. The clamp according to claim 2, characterized in that, The clamp also includes: A clamping screw, one end of which is connected to the clamping support base; A profiled clamping block is connected to the other end of the clamping screw; The profiled clamping block and the clamping support form a space for installing the root sleeve of the three-dimensional woven thrust propeller blade.

4. The clamp according to claim 3, characterized in that, The clamp also includes: A clamping nut is used to lock the profile clamping block.

5. The clamp according to claim 4, characterized in that, The profile support base is a support plate adapted to the profile of the three-dimensional woven thrust propeller blade.

6. The clamp according to claim 5, characterized in that, The profile clamping block is adapted to the root sleeve.

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