Flange welding tool for unmanned aerial vehicle engine muffler air inlet pipe

Abstract

The utility model discloses unmanned aerial vehicle engine silencer air inlet pipe flange welding frock, including bottom plate, flange positioning, flange clamping, back gas hole positioning and exhaust pipe positioning, the bottom plate is rectangle board, the flange positioning includes backing plate, positioning plate, center column and locating post, the flange clamping includes support, pressing plate, cylinder I, support plate I, the support is U shape, is fixed on the bottom plate of backing plate left side, back gas hole positioning includes support plate II, cylinder II and back gas hole plug, exhaust pipe positioning includes support plate III, cylinder III and air inlet pipe plug, the utility model discloses unmanned aerial vehicle engine silencer air inlet pipe flange welding frock's beneficial technical effects are accurate with flange and air inlet pipe are positioned and clamped, guarantee the product after welding can satisfy all design requirements simultaneously.

Description

Technical Field

[0001] This utility model relates to a welding technology for the air intake flange of a drone engine muffler, and particularly to a welding fixture for the air intake flange of a drone engine muffler. Background Technology

[0002] The drone engine muffler intake pipe is an irregularly shaped pipe with a three-dimensional curve along its entire axis. It has two straight segments, one long and one short, at each end. The angle between the planes of the axes of these two straight segments is α degrees. A flange is welded to the end of the shorter straight segment for connection to the intake pipe. Additionally, a return air hole is provided on the pipe wall above the shorter straight segment for connection to the return air pipe. The angle between the axis of the return air pipe and the plane of the shorter straight segment's end is β degrees, and the angle between the axis and the line connecting the return air pipe to the center of the flange bolt hole is γ degrees (see Appendix). Figure 1-6 In the diagram, a is the intake pipe, b is the flange, and c is the return air port. According to relevant technical requirements, the welded flange plane needs to be parallel to the end face of the short straight section of the intake pipe. At the same time, all the above angles must meet the design requirements.

[0003] The existing welding method for the intake pipe flange of the drone engine muffler uses a simple clamp to hold and weld the flange and intake pipe. Due to vibration and deformation during welding, it is difficult for the welded product to meet the above design requirements at the same time.

[0004] Clearly, the existing welding method for the intake flange of the muffler of a drone engine has problems such as difficulty in meeting all design requirements at the same time. Summary of the Invention

[0005] To address the problem that existing welding methods for the intake pipe flange of UAV engine mufflers are difficult to meet all design requirements simultaneously, this utility model proposes a welding fixture for the intake pipe flange of UAV engine mufflers.

[0006] This utility model relates to a welding fixture for the intake pipe flange of a drone engine muffler, comprising a base plate, flange positioning, flange clamping, return air hole positioning, and exhaust pipe positioning. The base plate is rectangular. The flange positioning includes a pad, a positioning plate, a center post, and positioning pins. The pad is rectangular and fixed to the center of the base plate. The positioning plate has the same shape as the flange and is fixed to the center of the pad. The diameter of the center post matches the inner hole of the short straight section of the intake pipe and is vertically fixed to the geometric center of the positioning plate. Two positioning pins have outer diameters matching the flange bolt holes and are vertically fixed to the positioning plate corresponding to the flange bolt holes. The flange clamping mechanism includes a support, a pressure plate, cylinder I, and support plate I. The support is U-shaped and fixed to the base plate on the left side of the pad. The pressure plate is L-shaped, with its bend hinged within the U-shaped opening of the support. The L-shaped pressure plate has a U-shaped opening on one side facing the pad, forming two pressure feet; the other side is hinged to the end of the piston of cylinder I. The rear end of cylinder I is hinged to support plate I. Support plate I is fixed to the left side of the base plate. The return air hole positioning mechanism includes support plate II, cylinder II, and a return air hole plug. Support plate II is fixed to the right side of the base plate, and the angle between the vertical line of support plate II and the surface of the base plate is β degrees. The angle between the line connecting the two positioning posts and the cylinder II is γ degrees; the cylinder II is fixed to the outside of the support plate II, and its piston passes through the support plate II and points towards the positioning plate; the diameter of the return air hole plug matches the return air hole of the intake pipe and is fixed to the end of the piston of cylinder II; the exhaust pipe positioning includes support plate III, cylinder III, and intake pipe plug; the support plate III is bent and vertically fixed to the base plate behind the pad; the angle between the perpendicular line of the bent section of the support plate III and the perpendicular line of the base plate is α degrees; the cylinder III is fixed to the outside of the bent section of the support plate III, and the piston of cylinder III passes through the bent section of the support plate III and points towards the pad; the intake pipe plug is fixed to the end of the piston of cylinder III. A step with a diameter matching the inner hole of the long straight section of the intake pipe is provided at the front end of the intake pipe plug; wherein, the fixed position and height of the support and cylinder I are such that after the piston of cylinder I extends, the two pressure feet at the front end of the pressure plate just press against the two ends of the flange placed on the positioning plate; the fixed position and height of the support plate II are such that after the piston of cylinder II extends, the return air hole plug just enters the return air hole of the intake pipe placed on the positioning plate; the fixed position and height of the support plate III are such that after the piston of cylinder III extends, the step of the intake pipe plug just enters the inner hole of the long straight section of the intake pipe placed on the positioning plate.

[0007] Furthermore, a triangular reinforcing rib I is provided between the base plate and the support plate II.

[0008] Furthermore, a triangular reinforcing rib II is provided between the base plate and the support plate III.

[0009] The beneficial technical effect of this utility model of welding fixture for the intake pipe flange of UAV engine muffler is that it can accurately position and clamp the flange and intake pipe, ensuring that the welded product can meet all design requirements at the same time. Attached Figure Description

[0010] Appendix Figure 1 This is a 3D schematic diagram of the intake flange of the muffler of a drone engine before and after welding.

[0011] Appendix Figure 2 This is a 3D schematic diagram of the air intake pipe of a drone engine muffler;

[0012] Appendix Figure 3 This is a 3D schematic diagram of the air intake pipe of the drone engine muffler from another angle;

[0013] Appendix Figure 4 This is a cross-sectional schematic diagram of the air intake pipe of the drone engine muffler;

[0014] Appendix Figure 5 This is a partial cross-sectional view of the air intake pipe of the drone engine muffler;

[0015] Appendix Figure 6 This is a 3D schematic diagram of the intake pipe and flange of the drone engine muffler;

[0016] Appendix Figure 7 This is a three-dimensional schematic diagram of the welding fixture for the intake pipe flange of the unmanned aerial vehicle engine muffler according to this utility model;

[0017] Appendix Figure 8 This is a three-dimensional schematic diagram of the flange positioning and flange clamping of the welding fixture of this utility model;

[0018] Appendix Figure 9 This is a three-dimensional schematic diagram of the positioning of the return air hole and the exhaust pipe of the welding fixture of this utility model;

[0019] Appendix Figure 10 This is a three-dimensional schematic diagram of the welding fixture clamping state of this utility model.

[0020] In the diagram, a is the intake pipe, b is the flange, c is the return air hole, and A is the intake pipe and flange; 1 is the base plate, 1-1 is triangular reinforcing rib I, and 1-2 is triangular reinforcing rib II; 2 is the flange positioning, 2-1 is the pad, 2-2 is the positioning plate, 2-3 is the center column, and 2-4 is the positioning column; 3 is the flange clamping, 3-1 is the support, 3-2 is the pressure plate, 3-3 is cylinder I, and 3-4 is the support plate I; 4 is the return air hole positioning, 4-1 is the support plate II, 4-2 is the cylinder II, and 4-3 is the return air hole plug; 5 is the intake pipe positioning, 5-1 is the support plate III, 5-2 is the cylinder III, and 5-3 is the intake pipe plug.

[0021] The welding fixture for the intake pipe flange of the UAV engine muffler of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. Detailed Implementation

[0022] See appendix Figure 7-10As shown in the figure, the welding fixture for the intake pipe flange of the UAV engine muffler of this utility model includes a base plate 1, a flange positioning 2, a flange clamping 3, a return air hole positioning 4, and an exhaust pipe positioning 5. The base plate is a rectangular plate. The flange positioning includes a pad 2-1, a positioning plate 2-2, a center post 2-3, and a positioning post 2-4. The pad is a rectangular plate and is fixed in the middle of the base plate. The positioning plate has the same shape as the flange and is fixed in the middle of the pad. The diameter of the center post matches the inner hole of the short straight section of the intake pipe and is vertically fixed at the geometric center of the positioning plate. There are two positioning posts, and their outer diameters match the flange bolt holes and are vertically fixed. The positions corresponding to the flange bolt holes on the positioning plate; the flange clamping includes a support 3-1, a pressure plate 3-2, a cylinder I 3-3, and a support plate I 3-4; the support is U-shaped and fixed to the base plate on the left side of the pad; the pressure plate is L-shaped, with its bend hinged to the U-shaped opening of the support; the L-shaped pressure plate has a U-shaped opening on the side facing the pad, forming two pressure feet, and the other side is hinged to the end of the piston of cylinder I; the rear end of cylinder I is hinged to support plate I; support plate I is fixed to the left side of the base plate; the return air hole positioning includes support plate II 4-1, cylinder II 4-2, and a return air hole plug 4-3; support plate II is fixed to the right side of the base plate, and The perpendicular line of support plate II forms an angle of β degrees with the surface of the base plate and an angle of γ degrees with the line connecting the two positioning posts; cylinder II is fixed to the outside of support plate II, and its piston passes through support plate II and points towards the positioning plate; the diameter of the return air hole plug matches the return air hole of the intake pipe and is fixed to the end of the piston of cylinder II; the exhaust pipe positioning includes support plate III 5-1, cylinder III 5-2, and intake pipe plug 5-3; support plate III is bent and vertically fixed to the base plate behind the pad; the perpendicular line of the bent section of support plate III forms an angle of α degrees with the perpendicular line of the base plate; cylinder III is fixed to the outside of the bent section of support plate III, and the piston of cylinder III passes through the bent section of support plate III and points towards the pad; the exhaust pipe positioning includes support plate III 5-1, cylinder III 5-2, and intake pipe plug 5-3; support plate III is bent and vertically fixed to the base plate behind the pad; the perpendicular line of the bent section of support plate III forms an angle of α degrees with the vertical line of the base plate; cylinder III is fixed to the outside of the bent section of support plate III, and its piston passes through the bent section of support plate III and points towards the pad; the exhaust pipe positioning includes support plate III 5-1, cylinder III 5-2, and cylinder III 5-3 ... The air pipe plug is fixed to the end of the piston of cylinder III. A step with a diameter matching the inner hole of the long straight section of the air pipe is provided at the front end of the air pipe plug. The fixed position and height of the support and cylinder I are such that after the piston of cylinder I extends, the two pressure feet at the front end of the pressure plate just press against the two ends of the flange placed on the positioning plate. The fixed position and height of the support plate II are such that after the piston of cylinder II extends, the return air hole plug just enters the return air hole of the air pipe placed on the positioning plate. The fixed position and height of the support plate III are such that after the piston of cylinder III extends, the step of the air pipe plug just enters the inner hole of the long straight section of the air pipe placed on the positioning plate.In practical use, the two bolt holes of the flange are fitted onto the positioning pins manually or with a robotic arm, while the flange is placed on the positioning plate. Cylinder I is activated, pushing the pressure foot at the front of the pressure plate to clamp the two ends of the flange, thus achieving flange positioning and clamping. The short straight section of the intake pipe is then fitted onto the center pin manually or with a robotic arm. Since the inner hole of the short straight section of the intake pipe matches the center pin, the intake pipe is initially positioned. Cylinder II is activated, pushing the return air plug into the return air hole of the intake pipe. Cylinder III is activated, pushing the step of the intake pipe plug into the inner hole of the long straight section of the intake pipe, thus achieving intake pipe positioning and clamping. Under these conditions, whether welding manually or mechanically, even with slight vibration or deformation, the stable clamping ensures good welding quality, guaranteeing that the welded product meets all design requirements simultaneously, especially the design requirements for the three included angles.

[0023] As one of the preferred technical solutions, triangular reinforcing ribs I1-1 are provided between the base plate and the support plate II; triangular reinforcing ribs II1-2 are provided between the base plate and the support plate III. This further increases the strength and rigidity of the welding fixture support plate, thus further ensuring welding quality.

[0024] Obviously, the beneficial technical effect of this utility model of welding fixture for the intake pipe flange of the UAV engine muffler is that it can accurately position and clamp the flange and the intake pipe, ensuring that the welded product can meet all design requirements at the same time.

Claims

1. A welding fixture for the air intake flange of a drone engine muffler, characterized in that, This welding fixture includes a base plate, flange positioning, flange clamping, return air port positioning, and exhaust pipe positioning. The base plate is a rectangular plate. The flange positioning includes a gasket, a positioning plate, a center post, and positioning pins. The gasket is a rectangular plate fixed in the middle of the base plate. The positioning plate has the same shape as the flange and is fixed in the middle of the gasket. The diameter of the center post matches the inner hole of the short straight section of the intake pipe and is vertically fixed at the geometric center of the positioning plate. There are two positioning pins, and their outer diameters match the flange bolt holes. They are vertically fixed on the positioning plate at the positions corresponding to the flange bolt holes. The flange clamping includes a support. The system comprises a pressure plate, cylinder I, and support plate I; the support is U-shaped and fixed to the base plate on the left side of the pad; the pressure plate is L-shaped, with its bend hinged within the U-shaped opening of the support; the L-shaped pressure plate has a U-shaped opening on one side facing the pad, forming two pressure feet, and the other side is hinged to the end of the piston of cylinder I; the rear end of cylinder I is hinged to support plate I; support plate I is fixed to the left side of the base plate; the air return hole positioning includes support plate II, cylinder II, and air return hole plug; support plate II is fixed to the right side of the base plate, and the angle between the vertical line of support plate II and the surface of the base plate is β degrees, and the line connecting the two positioning posts... The included angle is γ degrees; cylinder II is fixed to the outside of support plate II, and its piston passes through support plate II and points towards the positioning plate; the diameter of the return air hole plug matches the return air hole of the intake pipe and is fixed to the end of the piston of cylinder II; the exhaust pipe positioning includes support plate III, cylinder III, and intake pipe plug; support plate III is bent and vertically fixed to the base plate behind the pad plate; the angle between the perpendicular line of the bent section of support plate III and the perpendicular line of the base plate is α degrees; cylinder III is fixed to the outside of the bent section of support plate III, and the piston of cylinder III passes through the bent section of support plate III and points towards the pad plate; the intake pipe plug is fixed to the end of the piston of cylinder III, and in the intake... The front end of the pipe plug is provided with a step whose diameter matches the inner hole of the long straight section of the intake pipe; wherein, the fixed position and height of the support and cylinder I are such that after the piston of cylinder I extends, the two pressure feet at the front end of the pressure plate just press against the two ends of the flange placed on the positioning plate; the fixed position and height of the support plate II are such that after the piston of cylinder II extends, the return air hole plug just enters the return air hole of the intake pipe placed on the positioning plate; the fixed position and height of the support plate III are such that after the piston of cylinder III extends, the step of the intake pipe plug just enters the inner hole of the long straight section of the intake pipe placed on the positioning plate.

2. The welding fixture for the intake flange of the UAV engine muffler according to claim 1, characterized in that, A triangular reinforcing rib I is provided between the base plate and the support plate II.

3. The welding fixture for the intake flange of the UAV engine muffler according to claim 1 or 2, characterized in that, A triangular reinforcing rib II is provided between the base plate and the support plate Ⅲ.

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