Positioning device and method for welding and repairing aviation radiator

Abstract

The invention relates to the technical field of aviation maintenance, in particular to a positioning device and method for welding and repairing an aviation radiator. The device comprises a movable bottom plate, a rotating seat plate rotationally installed on the movable bottom plate, a fixing mechanism arranged on the rotating seat plate and used for fixing an aviation radiator core and a clamping mechanism used for clamping an aviation radiator half cover, and a rotating mechanism is arranged on the movable bottom plate and connected with the rotating seat plate. According to the positioning device and method for welding and repairing the aviation radiator, the lateral clamping plates provided with the positioning insertion rods are used for clamping, positioning and fixing the radiator core body at the same time, and rapid mounting, fixing and dismounting are achieved; the radiator core body is vertically fixed, so that the welding position is changed, and welding is facilitated; furthermore, the welding angle can be automatically adjusted through a rotating seat plate and a rotating mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of aviation maintenance, and in particular to a positioning device and method for welding and repairing an aviation radiator. Background Art

[0002] When repairing a certain type of aircraft air radiator product, the product line needs to be cut and separated. After the repair, argon arc welding is required to weld the two half covers to the core. Its structure is as follows Figure 1 As shown. The current repair method is to place it on the table and then manually support the welding. This repair method cannot accurately locate the relative position between the nozzle and the core, the welding accuracy is low, and the operation is inconvenient. Patent Publication No. CN213916607U discloses a positioning tool for welding and repairing an aviation radiator, the positioning tool comprises a mobile frame, two brackets symmetrically distributed on the mobile frame, a bottom plate between the upper ends of the two brackets, a positioning mechanism distributed on the left side of the bottom plate for clamping the radiator half cover, and a mounting mechanism symmetrically distributed on the front and rear sides of the bottom plate for fixing the radiator core. The two ends of the bottom plate are rotatably mounted on the two brackets through a rotating shaft, and the two brackets are correspondingly provided with an angle adjustment mechanism for adjusting the angle of the bottom plate. The positioning tool solves the problem of low positioning accuracy during welding of existing aircraft air radiators through the provided positioning blocks, clamps, mounting frames, and bolt positioning holes. Through the provided rotating shaft, worm gear reducer, hand wheel and mobile frame, the utility model can be moved and rotated to change the working angle to facilitate the welding angle and operation. However, the above-mentioned positioning tooling has some defects during actual use: first, multiple bolts need to be screwed in to fix the radiator core, and the installation and disassembly take a long time, affecting the welding efficiency; second, the radiator core is placed on its side for lateral welding. Due to the limitation of the bottom plate below, it is inconvenient to weld on the side facing downward during the welding process; third, when adjusting the welding angle, it is changed by manually turning the hand wheel, which makes the operation inconvenient and inefficient. Summary of the invention

[0003] In order to solve the above technical problems, the present invention proposes a positioning device and method for welding and repairing an aviation radiator.

[0004] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0005] A positioning device for welding and repairing an aircraft radiator comprises a movable base plate, a rotating seat plate rotatably mounted on the movable base plate, a fixing mechanism arranged on the rotating seat plate for fixing the core of the aircraft radiator, and a clamping mechanism for clamping a half cover of the aircraft radiator. The movable base plate is provided with a rotating mechanism, and the rotating mechanism is connected to the rotating seat plate.

[0006] As a further improvement of the present invention, a pushing frame is arranged on the left side of the movable bottom plate, and a pushing handle is arranged on the pushing frame.

[0007] As a further improvement of the present invention, a rotating shaft is provided at the bottom of the rotating seat plate, and the rotating seat plate is rotatably mounted on the movable base plate via the rotating shaft.

[0008] As a further improvement of the present invention, the rotating mechanism includes a transmission gear coaxially installed on the rotating shaft, a rotating gear meshingly connected to the transmission gear, and a rotating motor connected to the rotating gear, and the rotating motor is installed at the bottom of the movable base plate.

[0009] As a further improvement of the present invention, the fixing mechanism is symmetrically slidably installed on two lateral clamping plates at the front and rear sides of the rotating seat plate, a bidirectional screw rod and a driving motor are arranged at the bottom of the rotating seat plate. The bidirectional screw rod is distributed along the front and rear directions and is connected to the driving motor. The bottoms of the two lateral clamping plates are correspondingly connected to the bidirectional screw rods, and each lateral clamping plate is provided with a number of positioning rods.

[0010] A positioning method for welding and repairing an aviation radiator, using the above-mentioned positioning device for welding and repairing an aviation radiator, comprises the following steps:

[0011] Step 1: Clamp the two radiator half covers with two sets of pneumatic grippers, and then place the radiator core on the rotating base plate, with the tube sheet of the radiator core facing upwards and the flange surfaces on both sides corresponding to the two lateral clamping plates;

[0012] Step 2: Start the driving motor, and use the bidirectional screw rod to make the two side clamping plates move relative to each other, gradually fitting the flange surfaces on both sides of the radiator core. During the fitting process, the positioning rods on the side clamping plates are correspondingly inserted into the bolt holes on the flange surfaces on both sides of the radiator core;

[0013] Step 3: After the radiator core is fixed in place, the two radiator half covers are pre-installed on the tube sheet in corresponding positions, the limiting rod is pulled out from the limiting hole and the mounting hole, and then argon arc welding is performed. After one side of the welding is completed, the rotating motor is started and the rotating shaft is driven to rotate 90° through the rotating gear and the transmission gear to change the welding angle. After four rotations, the welding of one circle of the radiator half cover and the radiator core is completed;

[0014] Step 4: After welding is completed, the pneumatic gripper releases the clamping, the lateral clamping plate is reset, and the welded radiator is removed.

[0015] The beneficial effects of the present invention are:

[0016] The present invention provides a positioning device and method for welding and repairing aviation radiators. The lateral clamping plates provided with positioning plugs can clamp and position the radiator core at the same time, thereby achieving rapid installation, fixing and disassembly. The radiator core can be fixed vertically and the welding position can be changed to facilitate welding. Furthermore, automatic adjustment of the welding angle can be achieved by providing a rotating seat plate and a rotating mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0018] Figure 1 This is a schematic diagram of the aviation radiator structure;

[0019] Figure 2 It is a schematic diagram of the overall structure of the positioning device of the present invention;

[0020] Figure 3 It is a bottom view structural schematic diagram of the rotating seat plate in the positioning device of the present invention;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the lateral clamping plate in the positioning device of the present invention;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the clamping mechanism in the positioning device of the present invention;

[0023] Figure 6 It is a schematic diagram of the front cross-sectional structure of the clamping mechanism in the positioning device of the present invention;

[0024] Figure 7 It is a schematic diagram of the limiting rod structure in the positioning device of the present invention.

[0025] In the figure: 1. movable base plate; 2. rotating seat plate; 21. rotating shaft; 22. guide slot; 3. pushing frame; 31. pushing handle; 4. transmission gear; 5. rotating gear; 6. rotating motor; 7. lateral clamping plate; 71. positioning rod; 72. sliding connection; 73. connecting plate; 8. bidirectional screw rod; 9. driving motor; 10. supporting plate; 101. limiting hole; 11. pneumatic clamp; 12. L-shaped supporting frame; 121. mounting hole; 13. connecting rotating shaft; 14. limiting rod. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0027] like Figures 2 to 7As shown, a positioning device for welding and repairing an aviation radiator comprises a moving base plate 1, a rotating seat plate 2 rotatably mounted on the moving base plate 1, a fixing mechanism arranged on the rotating seat plate 2 for fixing the core of the aviation radiator, and a clamping mechanism for clamping a half cover of the aviation radiator, wherein the moving base plate 1 is provided with a rotating mechanism, and the rotating mechanism is connected to the rotating seat plate 2. A rotating shaft 21 is arranged at the bottom of the rotating seat plate 2, and the rotating seat plate 2 is rotatably mounted on the moving base plate 1 through the rotating shaft 21.

[0028] Further, a push frame 3 is provided on the left side of the movable bottom plate 1, and a push handle 31 is provided on the push frame 3. The push handle 31 enables the device to be movable.

[0029] As a further improvement of this embodiment, the rotating mechanism includes a transmission gear 4 coaxially mounted on the rotating shaft 21, a rotating gear 5 meshingly connected to the transmission gear 4, and a rotating motor 6 connected to the rotating gear 5, and the rotating motor 6 is mounted at the bottom of the movable base plate 1. Through the above structure, the device can automatically adjust the welding angle during the welding process.

[0030] As a further improvement of the present embodiment, the fixing mechanism is symmetrically slidably mounted on two lateral clamping plates 7 at the front and rear sides of the rotating seat plate 2, a bidirectional screw 8 arranged at the bottom of the rotating seat plate 2, and a driving motor 9. The bidirectional screw 8 is distributed along the front and rear directions and connected to the driving motor 9. The bottoms of the two lateral clamping plates 7 are correspondingly connected to the bidirectional screw 8, and each lateral clamping plate 7 is provided with a plurality of positioning plugs 71. Specifically, four guide slots 22 are correspondingly arranged at the front and rear sides of the rotating seat plate 2, and four sliding connection parts 72 are correspondingly fixedly connected to the bottoms of the two lateral clamping plates 7. The four sliding connection parts 72 are correspondingly slidably mounted in the four guide slots 22. A connecting plate 73 is connected between the two sliding connection parts 72 on the same side of the left and right sides, and the connecting plate 73 is correspondingly connected to the bidirectional screw 8. Through the above mechanism, the radiator core can be quickly installed, fixed or disassembled. Compared with the prior art, the installation and disassembly time is greatly shortened, and the welding efficiency is improved.

[0031] As a further improvement of this embodiment, the clamping mechanism includes a support plate 10 located directly above the rotating seat plate 2, and two sets of pneumatic grippers 11 arranged on the front and rear sides of the bottom of the support plate 10. An L-shaped support frame 12 is arranged on the left side of the movable base plate 1, and a connecting rotating shaft 13 is arranged on the upper plate surface of the support plate 10, and the support plate 10 is rotatably connected to the lower side of the top of the L-shaped support frame 12 through the connecting rotating shaft 13.

[0032] Furthermore, the support plate 10 is provided with four limiting holes 101 distributed circumferentially with the connecting rotating shaft 13 as the center, and the top right side of the L-shaped support frame 12 is provided with a mounting hole 121, and the mounting hole 121 corresponds to the limiting hole 101 located on the right side, and a limiting rod 14 inserted into the limiting hole 101 is installed in the mounting hole 121. In this embodiment, the upper rod portion of the limiting rod 14 is provided with an annular protrusion structure, which fits in the top of the L-shaped support frame 12, so that the limiting rod 14 does not fall off after being inserted into the mounting hole 121 and the limiting hole 101.

[0033] A positioning method for welding and repairing an aviation radiator, using the above-mentioned positioning device for welding and repairing an aviation radiator, comprises the following steps:

[0034] The first step: clamp the two radiator half covers by two sets of pneumatic grippers 11, and then place the radiator core on the rotating seat plate 2, with the tube sheet of the radiator core facing upward and the flange surfaces on both sides corresponding to the two lateral clamping plates 7.

[0035] Step 2: Start the driving motor 9, and use the bidirectional screw 8 to make the two lateral clamping plates 7 move relative to each other, gradually fitting the flange surfaces on both sides of the radiator core. During the fitting process, the positioning rods 71 ​​on the lateral clamping plates 7 are correspondingly inserted into the bolt holes on the flange surfaces on both sides of the radiator core.

[0036] Step 3: After the radiator core is fixed in place, the two radiator half covers are correspondingly positioned and pre-installed on the tube sheet, the limiting rod 14 is pulled out from the limiting hole 101 and the mounting hole 121, and then argon arc welding is performed. After one side of the welding is completed, the rotating motor 6 is started and the rotating shaft 21 is driven to rotate 90° through the rotating gear 5 and the transmission gear 4 to change the welding angle. After four rotations, the welding of one circle of the radiator half cover and the radiator core is completed.

[0037] Step 4: After the welding is completed, the pneumatic clamping hand 11 releases the clamping, the lateral clamping plate 7 is reset, and the welded radiator is removed.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A positioning device for welding and repairing an aviation radiator, characterized in that: The invention comprises a movable base plate (1), a rotating seat plate (2) rotatably mounted on the movable base plate (1), a fixing mechanism arranged on the rotating seat plate (2) for fixing an aviation radiator core, and a clamping mechanism for clamping an aviation radiator half cover, wherein a rotating mechanism is arranged on the movable base plate (1), and the rotating mechanism is connected to the rotating seat plate (2).

2. A positioning device for welding and repairing an aviation radiator according to claim 1, characterized in that: A pushing frame (3) is arranged on the left side of the movable bottom plate (1), and a pushing handle (31) is arranged on the pushing frame (3).

3. A positioning device for welding and repairing an aviation radiator according to claim 1, characterized in that: A rotating shaft (21) is provided at the bottom of the rotating seat plate (2), and the rotating seat plate (2) is rotatably mounted on the movable base plate (1) via the rotating shaft (21).

4. A positioning device for welding and repairing an aviation radiator according to claim 3, characterized in that: The rotating mechanism comprises a transmission gear (4) coaxially mounted on the rotating shaft (21), a rotating gear (5) meshingly connected to the transmission gear (4), and a rotating motor (6) connected to the rotating gear (5); the rotating motor (6) is mounted at the bottom of the movable base plate (1).

5. A positioning device for welding and repairing an aviation radiator according to claim 1, characterized in that: The fixing mechanism is symmetrically slidably mounted on two lateral clamping plates (7) at the front and rear sides of the rotating seat plate (2), a bidirectional screw rod (8) and a driving motor (9) arranged at the bottom of the rotating seat plate (2); the bidirectional screw rod (8) is distributed along the front and rear directions and is connected to the driving motor (9); the bottoms of the two lateral clamping plates (7) are correspondingly connected to the bidirectional screw rod (8); and each lateral clamping plate (7) is provided with a plurality of positioning rods (71).

6. A positioning device for welding and repairing an aviation radiator according to claim 5, characterized in that: Four guide slots (22) are correspondingly arranged at the front and rear sides of the rotating seat plate (2); four sliding connection parts (72) are correspondingly fixedly connected to the bottoms of the two lateral clamping plates (7); the four sliding connection parts (72) are correspondingly slidably installed in the four guide slots (22); a connecting plate (73) is connected between the two sliding connection parts (72) on the same left and right sides; the connecting plate (73) is correspondingly connected to the bidirectional screw rod (8).

7. A positioning device for welding and repairing an aviation radiator according to claim 1, characterized in that: The clamping mechanism comprises a support plate (10) located directly above the rotating seat plate (2), and two groups of pneumatic grippers (11) arranged on the front and rear sides of the bottom of the support plate (10).

8. A positioning device for welding and repairing an aviation radiator according to claim 7, characterized in that: An L-shaped support frame (12) is arranged on the left side of the movable base plate (1), and a connecting rotation shaft (13) is arranged on the upper plate surface of the support plate (10), and the support plate (10) is rotatably connected to the lower side of the top of the L-shaped support frame (12) via the connecting rotation shaft (13).

9. A positioning device for welding and repairing an aviation radiator according to claim 8, characterized in that: The support plate (10) is provided with four limiting holes (101) distributed in a circumferential direction with the connecting rotating shaft (13) as the center, and a mounting hole (121) is provided on the right side of the top of the L-shaped support frame (12), the mounting hole (121) corresponds to the limiting hole (101) located on the right side in upper and lower positions, and a limiting rod (14) inserted into the limiting hole (101) is installed in the mounting hole (121).

10. A positioning method for welding and repairing an aviation radiator, characterized in that: The positioning device for welding and repairing an aviation radiator according to any one of claims 1 to 9 comprises the following steps: The first step is to clamp the two radiator half covers by two sets of pneumatic grippers (11), and then place the radiator core on the rotating seat plate (2), with the tube sheet of the radiator core facing upward and the flange surfaces on both sides corresponding to the two lateral clamping plates (7); Step 2: Start the driving motor (9) and use the bidirectional screw rod (8) to make the two side clamping plates (7) move relative to each other and gradually fit the flange surfaces on both sides of the radiator core. During the fitting process, the positioning rods (71) on the side clamping plates (7) are correspondingly inserted into the bolt holes on the flange surfaces on both sides of the radiator core. Step 3: After the radiator core is fixed in place, the two radiator half covers are pre-installed on the tube sheet in a corresponding position, the limiting rod (14) is pulled out from the limiting hole (101) and the mounting hole (121), and then argon arc welding is performed. After one side of the welding is completed, the rotating motor (6) is started and the rotating shaft (21) is driven to rotate 90° through the rotating gear (5) and the transmission gear (4) to change the welding angle. After four rotations, the welding of one circle of the radiator half cover and the radiator core is completed; Step 4: After the welding is completed, the pneumatic clamp (11) releases the clamping, the lateral clamping plate (7) is reset, and the welded radiator is removed.

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