A welding tool for the middle and side frames of a drone truss

Abstract

The utility model discloses a welding tool for the side frame of a drone truss, which relates to the field of drone truss welding tooling, including a chassis, on which a plurality of first supports for constraining titanium alloy tubes are arranged, and the distribution positions of the first supports on the chassis correspond to the same distribution of welding positions on the side frame; the supports are provided with ventilation grooves and ventilation pieces for passing protective gas, and the rear welding position of the tooling side frame is located at the notch of the ventilation groove, and the interior of the ventilation groove is connected to the outside through the ventilation piece. The utility model can ensure the positioning of each titanium alloy tube in the side frame, reduce welding deformation, ensure the accuracy of the support assembly, and replace bolt connection or rivet connection with welding connection, so as to achieve the purpose of reducing the weight of the drone truss.

Description

Technical Field

[0001] The utility model relates to the field of unmanned aerial vehicle truss welding tooling, in particular to a welding tooling for an unmanned aerial vehicle truss assembly. Background Art

[0002] Traditional aircraft use frame and beam structures to manufacture the load-bearing components of the aircraft fuselage to ensure that the aircraft has sufficient strength when in flight. UAVs are unmanned aircraft that are controlled by radio remote control equipment or operated by pre-programmed programs. They are smaller in size and more flexible in flight. If the UAV power system remains unchanged, the primary consideration for increasing the flight speed and flight mileage is to reduce the weight of the aircraft.

[0003] Due to the excellent comprehensive properties of titanium alloy, the alloy can work at a temperature of 300-400℃ for a long time and has a density of 4.44-4.5g / cm³. It has been widely used in the aviation and aerospace industries. It is mainly used to manufacture engine fans and compressor discs and blades, as well as important load-bearing components of UAV trusses such as beams, joints and bulkheads in aircraft structures.

[0004] The drone truss is actually the main frame of the drone fuselage, which mainly includes two side frames and a top frame, and is made of titanium alloy pipes. Since titanium alloy pipes are easily deformed during high-temperature welding, the titanium alloy pipes in the side frames are currently mostly connected by bolts or rivets, which will increase the weight of the drone truss and thus increase the weight of the drone. Therefore, exploring the realization of welding titanium alloy pipes in the side frames is a technical problem that technicians in this field need to solve. Utility Model Content

[0005] The purpose of the utility model is to provide a welding tool for the side frame of an unmanned aerial vehicle truss in response to the above-mentioned problems, which can ensure the positioning of each titanium alloy tube in the side frame, reduce welding deformation, ensure the accuracy of the support assembly, and replace bolt connection or rivet connection with welding connection, so as to achieve the purpose of reducing the weight of the unmanned aerial vehicle truss.

[0006] The technical solution adopted by the utility model is as follows: a welding tool for the side frame in the truss of an unmanned aerial vehicle, including a base frame, on which a plurality of first supports for constraining titanium alloy tubes are arranged, and the distribution positions of the first supports on the base frame correspond to the same distribution of welding positions on the side frame; a ventilation groove and a ventilation piece for passing protective gas are arranged on the support, and the rear welding position of the side frame of the tooling is located at the notch of the ventilation groove, and the interior of the ventilation groove is connected to the outside through the ventilation piece.

[0007] Furthermore, the ventilation member is a ventilation hole, one end of the ventilation hole passes through the groove wall of the ventilation groove, and the other end of the ventilation hole passes through the outer wall of the first support.

[0008] Furthermore, one end of the vent hole passing through the vent groove is close to the bottom of the vent groove.

[0009] Furthermore, the first support is provided with a plurality of arcuate grooves matching the shape and size of the titanium alloy tube, and each arcuate groove is connected with a U-shaped pressing sheet for constraining the titanium alloy tube.

[0010] Furthermore, it also includes a second support for constraining a non-welding position on the titanium alloy tube.

[0011] Furthermore, an arc-shaped groove is provided on the second support, and a U-shaped pressing sheet for constraining the titanium alloy tube is connected to the arc-shaped groove.

[0012] Furthermore, the base frame is provided with a plurality of reference holes for positioning.

[0013] Furthermore, the base frame is provided with weight-reducing holes.

[0014] Furthermore, the base frame is a frame structure formed by welding stainless steel rectangular tubes, and the frame structure matches the geometric shape of the top frame.

[0015] Furthermore, the base frame is provided with lifting ears.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0017] 1. The utility model realizes the positioning of the titanium alloy tube by means of the constraint of the first support and the mutual abutment of the titanium alloy tubes in the side frame at the welding position, reduces welding deformation, ensures the dimensional accuracy of the top frame, and replaces bolt connection or rivet connection with welding connection, thereby achieving the purpose of reducing the weight of the UAV truss;

[0018] 2. The utility model provides ventilation grooves and ventilation parts, and introduces welding shielding gas into the ventilation grooves through the ventilation parts. The shielding gas protects the welding position, thereby avoiding oxidation at the welding position of the side frame, reducing dimensional changes during subsequent heat treatment, ensuring the dimensional accuracy of the top frame, and replacing bolt connections or rivet connections with welding connections, thereby reducing the weight of the UAV truss. The ventilation grooves can also provide welding operation space for welders. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0020] Figure 1 It is a structural schematic diagram of the welding tool disclosed in the utility model;

[0021] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0022] Markings in the figure: 1-base frame; 11-lifting ear; 12-reference hole; 2-first support; 21-ventilation groove; 22-ventilation hole; 3-second support; 4-U-shaped pressing piece; 5-bend groove;. DETAILED DESCRIPTION

[0023] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0024] Any feature disclosed in this specification, unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0025] Example 1

[0026] like Figure 1-Figure 2 As shown, a welding tool for the side frame in the truss of an unmanned aerial vehicle is shown, and the side frame is formed by connecting a plurality of titanium alloy tubes, and the connection of the titanium alloy tubes is the connection between the ends and the ends and the connection between the ends and the sides; specifically, the titanium alloy tubes in the side frame have a bent tube and a plurality of straight tubes; the welding tool comprises a base frame 1, and a plurality of first supports 2 for constraining the titanium alloy tubes are arranged on the base frame 1, and the distribution position of the first supports 2 on the base frame 1 corresponds to the same distribution of the welding positions on the side frame, so as to realize the positioning of each titanium alloy tube; the supports are provided with ventilation grooves 21 and ventilation parts for passing protective gas, and the rear welding position of the side frame of the tooling Located at the notch of the ventilation groove 21, the interior of the ventilation groove 21 is connected to the outside through a ventilation piece, and welding shielding gas, such as argon, is introduced into the ventilation groove 21 through the ventilation piece. The shielding gas flows out from the notch of the ventilation groove 21, and a protective atmosphere is formed at the welding position of the side frame to achieve the purpose of protecting the welding position, thereby avoiding oxidation at the welding position of the side frame, reducing dimensional changes during subsequent heat treatment, ensuring the dimensional accuracy of the top frame, and replacing bolt connection or rivet connection with welding connection, so as to achieve the purpose of reducing the weight of the UAV truss. The ventilation groove 21 can also provide welding operation space for welders.

[0027] In this embodiment, the first support 2 supporting the bent pipe utilizes the shape characteristics of the bent pipe itself to achieve the positioning of the bent pipe; after positioning the bent pipe, the straight pipe connected to the bent pipe abuts against the side of the bent pipe, thereby positioning the axial direction of the straight pipe connected to the bent pipe, and the first support 2 supporting the corresponding straight pipe constrains the circumferential direction of the corresponding straight pipe, thereby achieving the positioning of the straight pipe connected to the bent pipe; the straight pipes between the straight pipes connected to the bent pipe, their two ends respectively abut against the straight pipes connected to the bent pipe, and the first support 2 supporting the corresponding straight pipe constrains the circumferential direction of the corresponding straight pipe, thereby achieving the positioning of the straight pipes between the straight pipes connected to the bent pipe; in summary, all titanium alloy tubes can be positioned, welding deformation can be reduced, the dimensional accuracy of the top frame can be ensured, and welding connection can be used instead of bolt connection or rivet connection, thereby achieving the purpose of reducing the weight of the UAV truss.

[0028] Example 2

[0029] Based on Example 1, a specific implementation method that can be implemented is further proposed.

[0030] A feasible implementation manner is that the ventilation piece is a vent hole 22, one end of the vent hole 22 passes through the groove wall of the ventilation groove 21, and the other end of the vent hole 22 passes through the outer wall of the first support 2. During welding, the vent hole 22 can be inserted by an air pipe, thereby achieving the entry of welding shielding gas into the ventilation groove 21.

[0031] In a feasible implementation manner, one end of the vent hole 22 passing through the vent groove 21 is close to the bottom of the vent groove 21, so that the welding shielding gas can replace the air in the vent groove 21 as much as possible, and the shielding gas is usually argon gas with low density, which will move upward, and close to the bottom of the vent groove 21 meets the physical properties.

[0032] Example 3

[0033] Based on any one of the implementations in Examples 1-2, a feasible implementation is further proposed.

[0034] A feasible implementation method is that the first support 2 is provided with a plurality of arc grooves matching the shape and size of the titanium alloy tube, and each arc groove is connected to a U-shaped pressing plate 4 for constraining the titanium alloy tube, so as to constrain the circumferential direction of the titanium alloy tube, prevent the titanium alloy tube from shaking in the radial direction, and ensure that the constrained position of the titanium alloy tube is stable.

[0035] Further, for the bent pipe described in Example 1, the bent pipe has a straight section and a bent section, and the first support 2 supporting the same bent pipe is distributed on the bottom plate according to the shape of the bent pipe, that is, among the multiple first supports 2 used to support the same bent pipe, there is a first support 2 for supporting the straight section and a first support 2 for supporting the bent section; the arc groove (bent groove 5) for placing the bent section on the bent pipe matches the shape of the bent section; if the bent pipe needs to move along the axial direction, the straight section needs to move along the axis of the arc groove on the corresponding first support 2, and the bent section needs to move along the axis of the arc groove on the corresponding first support 2. Due to the special-shaped structure of the bent pipe, the axes of the two arc grooves are not parallel, which will cause motion interference. That is, only by respectively supporting the straight section and the bent section on the bent pipe, in cooperation with the U-shaped pressing plate 4 installed on the corresponding first support 2, the bent pipe can be effectively constrained and positioned, thereby ensuring the welding accuracy on the bent pipe and preventing deformation of the bent pipe.

[0036] A feasible implementation method is that the U-shaped pressing sheet 4 is symmetrically provided with fixing holes for connecting with the support, and the U-shaped pressing sheet 4 is detachably connected to the support through a connecting piece passing through the fixing holes, thereby realizing a detachable connection between the U-shaped pressing sheet 4 and the support; the connecting piece is preferably a connecting screw; thereby facilitating the placement of the titanium alloy tube in the corresponding arc groove.

[0037] Example 4

[0038] Based on any one of the implementations in Examples 1-3, a feasible implementation is further proposed.

[0039] A feasible implementation method also includes a second support 3 for constraining non-welding positions on the titanium alloy tube, which has a supporting and restraining function; for the titanium alloy tube, its wire diameter is relatively large, the first support 2 supports the end of the titanium alloy tube, and the second support 3 supports other positions of the titanium alloy tube to ensure the straightness of the titanium alloy tube during tooling and after welding, effectively prevent bending deformation, and ensure the dimensional accuracy of the top frame.

[0040] Furthermore, an arc groove is provided on the second support 3, and a U-shaped pressing plate 4 for constraining the titanium alloy tube is connected to the arc groove, so as to constrain the circumferential direction of the titanium alloy tube, prevent the titanium alloy tube from shaking in the radial direction, and ensure that the constrained position of the titanium alloy tube is stable.

[0041] In a feasible implementation manner, a plurality of reference holes 12 for positioning are provided on the base frame 1. The reference holes 12 are used as a positioning basis for the subsequent assembly of the side frame into the UAV truss to ensure the accuracy of the subsequent assembly of the UAV truss.

[0042] Example 5

[0043] Based on any one of the implementations in Examples 1-4, a feasible implementation is further proposed.

[0044] In a feasible implementation manner, the base frame 1 is provided with weight-reducing holes to reduce the weight of the base frame 1 and facilitate transportation; in particular, when performing heat treatment with tooling, the difficulty of loading the furnace is reduced.

[0045] Furthermore, a feasible implementation manner is that the base frame 1 is a frame structure formed by welding stainless steel rectangular tubes, the frame structure matches the geometric shape of the top frame, and the hollow holes in the frame structure can be weight-reducing holes; stainless steel rectangular tubes are used, which are light in weight and have high resistance to thermal deformation, and when the top frame is subjected to heat treatment with tooling, the size and precision of the top frame can be effectively prevented from changing.

[0046] In a feasible implementation manner, the base frame 1 is provided with lifting ears 11 to facilitate lifting.

[0047] The present invention is not limited to the above-mentioned specific implementation modes, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A welding tool for the side frame of a drone truss, characterized by: The invention comprises a base frame (1), wherein a plurality of first supports (2) for restraining titanium alloy tubes are arranged on the base frame (1), and the distribution positions of the first supports (2) on the base frame (1) correspond to the same distribution positions of welding positions on the side frame; the supports are provided with ventilation grooves (21) and ventilation pieces for allowing the introduction of protective gas, and the rear welding position of the tooling side frame is located at the notch of the ventilation groove (21), and the interior of the ventilation groove (21) is connected to the outside through the ventilation piece.

2. The welding tool according to claim 1, characterized in that: The venting member is a vent hole (22), one end of the vent hole (22) passes through the groove wall of the vent groove (21), and the other end of the vent hole (22) passes through the outer wall of the first support (2).

3. The welding tool according to claim 2, characterized in that: One end of the vent hole (22) passing through the vent groove (21) is close to the bottom of the vent groove (21).

4. The welding tool according to claim 1, characterized in that: The first support (2) is provided with a plurality of arc-shaped grooves matching the shape and size of the titanium alloy tube, and each arc-shaped groove is connected to a U-shaped pressing sheet (4) for constraining the titanium alloy tube.

5. The welding tool according to claim 1, characterized in that: It also includes a second support (3) for constraining a non-welding position on the titanium alloy tube.

6. The welding tool according to claim 5, characterized in that: The second support (3) is provided with an arc-shaped groove, and the arc-shaped groove is connected to a U-shaped pressing sheet (4) for constraining the titanium alloy tube.

7. The welding tool according to any one of claims 1 to 6, characterized in that: The base frame (1) is provided with a plurality of reference holes (12) for positioning.

8. The welding tool according to any one of claims 1 to 6, characterized in that: The base frame (1) is provided with weight-reducing holes.

9. The welding tool according to claim 8, characterized in that: The bottom frame (1) is a frame structure formed by welding stainless steel rectangular tubes, and the frame structure matches the geometric shape of the top frame.

10. The welding tool according to any one of claims 1 to 6, characterized in that: The base frame (1) is provided with a lifting lug (11).

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