A method of manufacturing a folding rudder wing

Abstract

The application relates to a folding rudder wing manufacturing method, which comprises the following steps: providing two split workpieces, setting a reference surface and a surface to be machined; positioning by using the reference surface, clamping the split workpieces; cutting the surface to be machined to obtain a characteristic morphology; grinding the split workpieces to make the roughness of the reference surface less than 0.08 mu m; welding the two split workpieces to form a combined workpiece; and cutting the contour and hinge shaft hole of the folding rudder wing to obtain the folding rudder wing. The technical scheme of the application combines the traditional mechanical cutting process method with the diffusion brazing process, sets the split workpieces, increases the reference plane, makes the split workpieces convenient for positioning and clamping, helps to reduce the workpiece clamping difficulty, improves the machining precision, reduces the process technical requirement, improves the rudder wing production efficiency, reduces the production cost, and improves the machining precision.

Description

Technical Field

[0001] This invention belongs to the field of folding rudder manufacturing technology, and particularly relates to a method for manufacturing folding rudders. Background Technology

[0002] Control wings are part of the aerodynamic components of an aircraft. Their primary function is to reduce lift at the tail, preventing it from exceeding that at the nose, thus suppressing over-steering and maintaining stability at high speeds. Control wings typically consist of curved control surfaces, and to save assembly space, some control wings also have hinge holes, allowing them to be folded and stored. Currently, control wings are often made of titanium alloy. Due to the extremely high hardness of titanium alloy and the curved shape of the control wing surfaces, clamping and positioning the wings is difficult, resulting in extremely high machining difficulty and low precision.

[0003] In the prior art, patent document with publication number "CN117508629A" discloses a rudder wing processing method, including: 3D printing a rudder wing blank; detecting the symmetry of the process boss with respect to the central wing surface of the wing body, and detecting the outer dimensions of the process boss, the neck of the connecting shaft, and the process allowance of the bottom surface using the rear wall of the wing body as a reference; processing a first plane and a second plane using the central wing surface as a reference, wherein the symmetry of the process boss with respect to the central wing surface is within 0.08mm, and opening a positioning hole on the process boss, wherein the perpendicularity with the first plane is within 0.02mm; using the rear wall as a reference, rough machining the shaft end face and shaft root shape of the connecting shaft, as well as the bottom surface of the wing body; using the positioning hole to position and clamp the process boss on a lathe fixture, and finish machining the journal, shaft end face, internal threaded hole, and external thread of the connecting shaft; and removing the process boss. The adoption of this patented technology has improved the clamping accuracy of the rudder to a certain extent. However, due to the overly complex fixture structure and the high cost of 3D printing technology, the promotion and application of the aforementioned patented technology has been affected. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a method for manufacturing folding rudders.

[0005] This invention provides a method for manufacturing a folding rudder, comprising the following steps: Step 1: Provide two separate workpieces, and use one side of the separate workpieces as the reference surface, and the other side of the separate workpieces as the surface to be processed; Step 2: Use the reference plane for positioning and clamp the split workpiece; Step 3: Perform cutting processing on the split workpiece to obtain the characteristic morphology of the surface to be processed in Step 1; Step 4: Grind the split workpiece to make the roughness of the reference surface less than 0.08μm; Step 5: First, overlap the corresponding reference surfaces of the two separate workpieces, and then weld them together to fix the two separate workpieces into a combined workpiece. Step 6: Perform cutting machining on the assembled workpiece to obtain the outer contour of the folding rudder; Step 7: After machining the surface of the combined workpiece to obtain the hinge hole, a folding rudder is produced.

[0006] In step one, the material of the split workpiece is titanium alloy.

[0007] In step one, a guide platform is provided at the four corners of the split workpiece; in step two, when the split workpiece is clamped, the clamping force is applied to the surface of the guide platform; in step six, when the combined workpiece is machined, the guide platform is also removed.

[0008] The force-guiding platform is rectangular in shape.

[0009] In step four, the split workpiece is ground to make the flatness of the reference surface less than 0.05mm.

[0010] In step two, the feature morphology includes one or more of the following shape features: a weight-reducing groove for reducing the overall weight of the split workpiece, a reinforcing rib for increasing the structural strength of the split workpiece, an exhaust groove for guiding the airflow path on the surface of the split workpiece, and a positioning hole for connecting the split workpiece with other components.

[0011] In step five, the welding method is diffusion brazing, and the welding process is completed in a vacuum environment.

[0012] In step six, the combined workpiece is machined using wire cutting.

[0013] In step six, the outer contour of the folding rudder is a right-angled trapezoidal metal sheet.

[0014] In step seven, the machining of the combined workpiece is performed by drilling.

[0015] The beneficial effects of this invention are as follows: By combining the traditional machining process with diffusion brazing, the rudder blank is divided into two separate workpieces. By setting the separate workpieces, a reference plane is added to the surface of the blank, making it easier to position and clamp the separate workpieces. This helps to reduce the difficulty of workpiece clamping, improve the stability of workpiece clamping, and lay the foundation for improving machining accuracy. After machining the separate workpieces, the two separate workpieces are then fixed together as one piece by diffusion brazing. This reduces the technical requirements of the process, improves the production efficiency of the rudder, reduces production costs, and improves machining accuracy. Attached Figure Description

[0016] Figure 1 This is a process flow diagram of the present invention; Figure 2 This is a front view of the split-type workpiece of the present invention; Figure 3 This is a left view of the split workpiece of the present invention.

[0017] In the figure: 1-Separated workpiece, 2-Reference surface, 3-Surface to be machined, 4-Guide table, 5-Feature morphology. Detailed Implementation

[0018] The technical solution of the present invention will be further described below with reference to the accompanying drawings, but the scope of protection claimed is not limited thereto; This invention provides a method for manufacturing folding rudders, such as... Figures 1 to 3 As shown, it includes the following steps: Step 1: Provide two separate workpieces 1, and use one side of the separate workpiece 1 as the reference surface 2, and the other side of the separate workpiece 1 as the surface to be processed 3. Step 2: Use datum plane 2 for positioning and clamp the split workpiece 1; Step 3: Perform cutting machining on the split workpiece 1, and obtain the characteristic morphology 5 of the surface to be machined in step 1 3; Step 4: Grind the split workpiece 1 to make the roughness of the reference surface 2 less than 0.08μm; Step 5: First, overlap the corresponding reference surfaces 2 of the two separate workpieces 1, and then weld them together to fix the two separate workpieces 1 into a combined workpiece. Step 6: Perform cutting and machining on the assembled workpiece to obtain the outline of the folding rudder. Step 7: After machining the surface of the combined workpiece to obtain the hinge hole, the folding rudder is produced.

[0019] The technical solution of this invention combines traditional machining processes with diffusion brazing. By dividing the rudder blank into two separate workpieces, a reference plane is added to the surface of the blank, making it easier to position and clamp the separate workpieces. This helps reduce the difficulty of workpiece clamping, improves workpiece clamping stability, and lays the foundation for improving machining accuracy. After machining the separate workpieces, the diffusion brazing process is used to fix the separate workpieces together as one unit, reducing the technical requirements of the process, improving the production efficiency of the rudder, reducing production costs, and improving machining accuracy.

[0020] Specifically, in step one, the material of the split workpiece 1 is titanium alloy. In step one, guide tables 4 are also provided at the four corners of the split workpiece 1; in step two, when the split workpiece 1 is clamped, the clamping force acts on the surface of the guide table 4; in step six, when the combined workpiece is machined, the guide table 4 is also removed. Preferably, the guide table 4 is rectangular. By using the technical solution of this invention, by setting several guide tables on the surface of the split workpiece, the split workpiece is easier to clamp and position, and the split workpiece can maintain a stable positioning position and posture during the machining process, which helps to improve the machining accuracy.

[0021] In addition, in step four, grinding the split workpiece 1 further reduces the flatness of the reference surface 2 to less than 0.05 mm. By employing the technical solution of this invention, grinding the reference surface 2 improves its flatness and roughness accuracy. When the two split workpieces are welded together, the overall machining accuracy of the rudder can be improved.

[0022] Specifically, in step two, feature morphology 5 includes one or more shape features such as a weight-reducing groove for reducing the overall weight of the split workpiece 1, a reinforcing rib for increasing the structural strength of the split workpiece 1, an exhaust groove for guiding the airflow path on the surface of the split workpiece 1, and a positioning hole for connecting the split workpiece 1 with other components.

[0023] Furthermore, in step five, the welding method is diffusion brazing, and the welding process is completed in a vacuum environment. In step six, the machining of the assembled workpiece is performed using wire cutting. In step six, the outer contour of the folding rudder is a right-angled trapezoidal metal sheet. In step seven, the machining of the assembled workpiece is performed using drilling.

Claims

1. A method for manufacturing a folding rudder, characterized in that: Includes the following steps: Step 1: Provide two separate workpieces (1), and use one side of the separate workpiece (1) as the reference surface (2), and the other side of the separate workpiece (1) as the surface to be processed (3). Step 2: Use the reference surface (2) for positioning and clamp the split workpiece (1); Step 3: Perform cutting processing on the split workpiece (1) to obtain the characteristic morphology (5) of the surface to be processed (3) in step 1; Step 4: Grind the split workpiece (1) to make the roughness of the reference surface (2) less than 0.08μm; Step 5: First, overlap the corresponding reference surfaces (2) of the two separate workpieces (1) and then weld them together to form a combined workpiece. Step 6: Perform cutting machining on the assembled workpiece to obtain the outer contour of the folding rudder; Step 7: After machining the surface of the combined workpiece to obtain the hinge hole, a folding rudder is produced.

2. The method for manufacturing a folding rudder as described in claim 1, characterized in that: In step one, the material of the split workpiece (1) is titanium alloy.

3. The method for manufacturing a folding rudder as described in claim 1, characterized in that: In step one, a guide platform (4) is provided at the four corners of the split workpiece (1); in step two, when the split workpiece (1) is clamped, the clamping force is applied to the surface of the guide platform (4); in step six, when the combined workpiece is cut, the guide platform (4) is also removed.

4. The method for manufacturing a folding rudder as described in claim 3, characterized in that: The force-guiding platform (4) is rectangular in shape.

5. The method for manufacturing a folding rudder as described in claim 1, characterized in that: In step four, the split workpiece (1) is ground, and the flatness of the reference surface (2) is made less than 0.05 mm.

6. The method for manufacturing a folding rudder as described in claim 1, characterized in that: In step two, the feature morphology (5) includes one or more shape features such as a weight-reducing groove for reducing the overall weight of the split workpiece (1), a reinforcing rib for increasing the structural strength of the split workpiece (1), an exhaust groove for guiding the airflow path on the surface of the split workpiece (1), and a positioning hole for connecting the split workpiece (1) with other components.

7. A method for manufacturing a folding rudder as described in claim 1, characterized in that: In step five, the welding method is diffusion brazing, and the welding process is completed in a vacuum environment.

8. A method for manufacturing a folding rudder as described in claim 1, characterized in that: In step six, the combined workpiece is machined using wire cutting.

9. A method for manufacturing a folding rudder as described in claim 1, characterized in that: In step six, the outer contour of the folding rudder is a right-angled trapezoidal metal sheet.

10. A method for manufacturing a folding rudder as described in claim 1, characterized in that: In step seven, the machining of the combined workpiece is performed by drilling.

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