Laser welding device and method for aircraft silencer

Abstract

The invention provides a laser welding device for an aircraft silencer. The laser welding device comprises an integral frame, a laser welding device and a laser welding device, the positioner (4) is arranged on the integral frame; the electric / pneumatic control box (5) is arranged on the integral frame; the laser welding gun (8) is arranged on the integral frame; the clamp main body (1) is arranged on the positioner; the pneumatic pressing device is arranged on the clamp main body, and the pneumatic pressing device is used for pressing and positioning the aircraft silencer; meanwhile, the invention further provides a laser welding method for the aircraft silencer. According to the invention, the production efficiency is improved while the welding quality of product parts is ensured.

Description

Technical Field

[0001] The present application belongs to the technical field of aviation manufacturing parts process, and in particular, relates to a laser welding device and method for an aircraft muffler. Background Art

[0002] Compared with the original gas welding or electric welding methods, the laser welding process has the advantages of good welding quality, good sustainability, and low requirements for auxiliary conditions. Taking this as an opportunity, we can further improve the current production status and enhance the degree of automation of existing welding processes.

[0003] Aircraft muffler parts are a typical type of thin welding parts, with a structure such as Figure 1 As shown, it consists of an inner cylinder, an outer cylinder and a thin flange, where the annular weld is between the outer cylinder and the thin flange, which has high requirements for the welding process:

[0004] 1. The annular weld must be uniform and stable, and the welding state must be stable.

[0005] 2. Thin flanges must avoid deformation caused by welding heat and require a stable and reliable clamping device.

[0006] The current process is to use two steel sheets of the same shape and size as the thin flange as a fixture to clamp the flange, install bolts and nuts in each hole of the flange, and press the flange and the steel sheet together. Figure 2 As shown. Then the muffler parts and the fixture are placed together on a rotatable workbench. The operator completes the welding of a section of the area by manual welding, then rotates the workbench and welds another section of the area until the circumference welding is completed. This process method has the following defects:

[0007] 1. The workbench clamps the parts and cannot rotate at a uniform speed. The circumferential seam welding process cannot be completed in one go. It needs to be welded in sections, the weld is uneven, and the welding efficiency is low.

[0008] 2. The tooling used to prevent the flange from being deformed due to heat requires many bolts to connect, resulting in a long installation time and low efficiency. Summary of the invention

[0009] Purpose of the invention: The present invention overcomes the deficiencies in the prior art and provides a fixture that realizes the semi-automatic operation of the annular weld of aircraft muffler parts, while achieving the firm clamping of the thin flange, the uniform rotation of the parts during the welding operation, and the stable clamping of the laser welding gun.

[0010] In a first aspect, the present application provides a laser welding device for an aircraft muffler, the device comprising:

[0011] Overall framework;

[0012] A positioner, arranged on the overall frame;

[0013] An electric / pneumatic control box 5, arranged on the overall frame;

[0014] A laser welding gun 8, arranged on the overall frame;

[0015] A fixture body 1 is arranged on the positioner;

[0016] A pneumatic pressing device is arranged on the fixture body, and is used for pressing and positioning the aircraft muffler.

[0017] Preferably, the pneumatic pressing device is composed of an angle cylinder 3 and a pressing plate 2, and the pressing plate is connected to the angle cylinder and is used to press the peripheral flange of the aircraft silencer.

[0018] Preferably, the electric / pneumatic control box is used to control the switching of the pressing and relaxing states of the pressing plate, the rotation and stopping of the positioner, and the starting and stopping of the laser welding gun.

[0019] Preferably, the fixture body is a disc, the disc is coaxial with the three-jaw caliper on the positioner and the aircraft muffler, and the upper surface of the disc is perpendicular to the axis of the three-jaw caliper on the positioner and the aircraft muffler.

[0020] Preferably, six pneumatic clamping devices are evenly arranged on the fixture body around the aircraft silencer, and the pressure plate is powered by a rotation cylinder to switch between the clamping and relaxing states, and the rotation angle of the rotation cylinder is 90 degrees.

[0021] Preferably, the pressure plate is designed as a segmented circular ring structure. When in the clamped state, each pressure plate ring is coaxial with the aircraft silencer to clamp the circumference of the flange of the aircraft silencer. After welding is completed, the angle cylinder relaxes each pressure plate and rotates in a preset direction to release the aircraft silencer.

[0022] Preferably, the front arc radius and rear end length of the pressure plate are changed accordingly according to the changes in the diameters of the sleeve and the flange in the aircraft silencer, and the pressure plate is connected to the angle cylinder in a detachable and replaceable threaded connection.

[0023] In a second aspect, the present application also provides a laser welding method for an aircraft muffler, the method comprising:

[0024] Step 1, after the aircraft muffler is installed on the fixture body, the electric / pneumatic control box controls the pressing plate to rotate and press the aircraft muffler at the same time; the electric / pneumatic control box controls the positioner to start rotating at a uniform speed; the electric / pneumatic control box controls the laser welding gun to start running and continuously weld the weld position;

[0025] Step 2: After welding is completed, the electric / pneumatic control box controls the laser welding gun to stop running; the electric / pneumatic control box controls the positioner to stop rotating; the electric / pneumatic control box controls the pressure plate to release the aircraft muffler at the same time, and the operator removes the aircraft muffler to complete the welding process.

[0026] Preferably, each step is divided into three actions, and the three actions are automatically executed according to a preset sequence and interval time.

[0027] Beneficial technical effects of this application:

[0028] The present invention provides a tooling fixture and an operating method, which adopts an angle cylinder to control a pressure plate to realize automatic pressing of a thin flange of an aircraft muffler-type part; adopts a positioner to realize uniform rotation of a fixture body to ensure welding quality and automation; installs a system consisting of the positioner and the fixture body on an overall frame, and installs a laser welding gun and a control box for controlling the operation of the entire electrical and pneumatic systems on the frame to improve the automation and integration of the entire fixture.

[0029] Compared with the existing technical methods, the present invention improves production efficiency while ensuring the welding quality of product parts. The time for clamping and seaming product parts is shortened from the original 15 minutes / piece to 1 minute / piece, the welding speed is increased by more than 2 times, and the overall production efficiency is increased by 6 to 10 times. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of aircraft muffler parts;

[0031] Figure 2 This is a schematic diagram of an existing aircraft muffler parts fixture;

[0032] Figure 3 It is a schematic diagram of the fixture of the present invention;

[0033] Figure 4 This is a schematic diagram of the clamp body pressure plate assembly in a compressed state;

[0034] Figure 5 This is a schematic diagram of the clamp body pressure plate assembly in a relaxed state;

[0035] Figure 6 Figure 2 is the appearance diagram of the pressure plate;

[0036] Among them: 1. fixture body, 2. pressure plate, 3. angle cylinder, 4. positioner, 5. electric / pneumatic control box, 6. overall frame, 7. aircraft muffler, 8. laser welding gun, 9. fixture, 10. bolts, 11. nuts, 701. inner cylinder, 702. outer cylinder, 703. thin flange, 704. annular weld. DETAILED DESCRIPTION

[0037] See also Figures 3 to 6 , the present invention is achieved through the following technical solutions:

[0038] like Figure 3 As shown, the present application provides a jig device, wherein a positioner 4, an electric / pneumatic control box 5 and a laser welding gun 8 are installed on an overall frame 6, a jig body 1 is installed on the positioner 4, a pneumatic clamping device is installed on the jig body 1 and an aircraft muffler product part 7 (hereinafter referred to as a product part) is positioned, and the pneumatic clamping device is composed of an angle cylinder 3 and a pressing plate 2, and the pressing plate 2 is connected to the angle cylinder 3 and is used to clamp the flange around the product part 7. The electric / pneumatic control box 5 is used to control the switching of the clamping and relaxing states of the pressing plate 2, the rotation and stopping of the positioner 4, and the starting and stopping of the laser welding gun 8.

[0039] The main structure of the fixture body 1 is disc-shaped, coaxial with the three-jaw caliper on the positioner 4 and the product part 7, and the upper surface is perpendicular to the axis of the three-jaw caliper on the positioner 4 and the product part 7. Six pneumatic clamping devices are evenly arranged around the product part 7 on the fixture body 1. The pressure plate 2 is powered by the angle cylinder 3 to switch between the clamping and relaxing states. The angle of the angle cylinder 3 is 90 degrees, and the rotation direction is as follows: Figure 4 , Figure 5 shown.

[0040] The pressing plate 2 is designed as a segmented circular ring structure. When in the clamping state, the circular rings of each pressing plate 2 are coaxial with the product part 7 to clamp the circumference of the product flange. Figure 4 Turn in the indicated direction to release the middle position of the clamp.

[0041] Among them, the front arc radius and the rear end length of the pressing plate 2 (such as Figure 6 ), can be changed accordingly according to the change of the diameter of the sleeve and the flange in the product part 7, and is connected to the angle cylinder 3 by a detachable and replaceable threaded connection.

[0042] The laser welding gun 8 is fixed on the side of the overall frame 6, and the end of the welding gun adjusts the distance and angle according to the welding requirements and is aligned with the predetermined welding position.

[0043] Among them, the rotation of the positioner 4, the rotation of the angle cylinder 3 controlling the pressure plate 2 and the start of the laser welding gun 8 are controlled by the electric / pneumatic control box 5. The mutual sequencing and time intervals are determined according to the process requirements. They can be controlled separately or together.

[0044] The overall frame 6 can be installed with casters (such as Figure 3 ) Realize the flexible movement of the entire fixture, and can also be fixed in the production area without installing casters.

[0045] The present invention provides a tooling fixture and an operating method, which adopts an angle cylinder to control a pressure plate to realize automatic pressing of a thin flange of an aircraft muffler-type part; adopts a positioner to realize uniform rotation of a fixture body to ensure welding quality and automation; installs a system consisting of the positioner and the fixture body on an overall frame, and installs a laser welding gun and a control box for controlling the operation of the entire electrical and pneumatic systems on the frame to improve the automation and integration of the entire fixture.

[0046] Compared with the existing technical methods, the present invention improves production efficiency while ensuring the welding quality of product parts. The time for clamping and seaming product parts is shortened from the original 15 minutes / piece to 1 minute / piece, the welding speed is increased by more than 2 times, and the overall production efficiency is increased by 6 to 10 times.

[0047] In other embodiments of the present application, the present application provides a fixture device, such as Figure 3 As shown, the positioner 4, the electric / pneumatic control box 5 and the laser welding gun 8 are centrally mounted on the overall frame 6. The fixture body 1 is coaxially mounted on the three-jaw caliper of the positioner 4, and the six clamping assemblies are evenly arranged around the product part 7 and mounted on the fixture body 1.

[0048] The clamping assembly is composed of a rotation cylinder 3 and a pressure plate 2. The six pressure plate assemblies are pneumatically controlled. The rotation cylinder 3 drives the pressure plate 2 to perform a 90-degree rotation movement at the same time, and stops at the compression and relaxation states of the pressure plate 2 on the thin flange of the product part 703 (such as Figure 4 , Figure 5 ).

[0049] The positioner 4 is electrically controlled to drive the fixture body 1 and the product parts 7 mounted thereon to rotate at a constant speed.

[0050] The laser welding gun 8 is adjusted in angle according to the welding process requirements, and after the gun head is aligned with the welding seam position, it is fixedly mounted on the vertical pole on the side of the overall frame 6 .

[0051] In a feasible implementation, the device usage process provided by this application is as follows:

[0052] Step 1:

[0053] (1) After the product part 7 is installed in the fixture body 1, the pressing plate 2 rotates and presses the product part 7 at the same time; (2) the positioner 4 starts to rotate at a constant speed; (3) the laser welding gun 8 starts to operate and welds the weld position.

[0054] Step 2:

[0055] (1) After welding is completed, the laser welding gun 8 stops running; (2) the positioner 4 stops rotating; (3) the pressing plate 2 releases the product part 7 at the same time, and the operator removes the product part 7, completing the welding process.

[0056] Each step is divided into three actions, with an interval of about 1 second, all of which are controlled by the electric / pneumatic control box 5. The specific settings can be operated by three buttons respectively, or one button can be used to automatically run after setting the sequence and interval time.

[0057] The present invention belongs to the field of aviation manufacturing parts process technology, and relates to a welding process for annular welds of aircraft muffler parts. The present invention discloses a semi-automatic tooling and method for laser welding of aircraft mufflers. It adopts an angle cylinder to control the pressure plate to realize the automatic clamping of the thin flange of aircraft muffler parts; adopts a positioner to realize the uniform rotation of the fixture body to ensure the quality and automation of welding; the system composed of the positioner and the fixture body is installed on the overall frame, and a laser welding gun and a control box for controlling the operation of the entire electrical and pneumatic system are installed on the frame to improve the automation and integration of the entire fixture.

[0058] By means of the fixture and the method of use, the aircraft muffler parts can be improved from the original manual processing to the automated processing at a relatively low cost, which greatly improves the production efficiency while ensuring the process quality.

Claims

1. A laser welding device for aircraft muffler, characterized in that: The device comprises: Overall framework; A positioner (4) is arranged on the overall frame; An electric / pneumatic control box (5) is arranged on the overall frame; A laser welding gun (8) is arranged on the overall frame; A clamp body (1) is arranged on the positioner; A pneumatic pressing device is arranged on the fixture body, and is used for pressing and positioning the aircraft muffler.

2. The device according to claim 1, characterized in that The pneumatic pressing device is composed of an angle cylinder (3) and a pressing plate (2), wherein the pressing plate is connected to the angle cylinder and is used for pressing the peripheral flange of the aircraft silencer.

3. The device according to claim 2, characterized in that The electric / pneumatic control box is used to control the switching of the pressing and relaxing states of the pressing plate, the rotation and stopping of the positioner, and the starting and stopping of the laser welding gun.

4. The device according to claim 3, characterized in that The fixture body is a disc, which is coaxial with the three-jaw caliper on the positioner and the aircraft muffler, and the upper surface of the disc is perpendicular to the axis of the three-jaw caliper on the positioner and the aircraft muffler.

5. The device according to claim 4, characterized in that Six pneumatic clamping devices are evenly arranged on the fixture body around the aircraft muffler. The pressure plate is powered by a rotating cylinder to switch between the clamping and relaxing states. The rotating angle of the rotating cylinder is 90 degrees.

6. The device according to claim 5, characterized in that The pressure plate is designed as a segmented circular ring structure. When in the clamped state, each pressure plate ring is coaxial with the aircraft silencer to clamp the flange circumference of the aircraft silencer. After welding is completed, the angle cylinder relaxes each pressure plate and rotates in a preset direction to release the aircraft silencer.

7. The device according to claim 6, characterized in that The front arc radius and the rear end length of the pressure plate are changed accordingly according to the changes in the diameters of the sleeve and the flange in the aircraft silencer, and are connected to the angle cylinder in a detachable and replaceable threaded connection.

8. A laser welding method for aircraft muffler, characterized in that: The method comprises: Step 1, after the aircraft muffler is installed on the fixture body, the electric / pneumatic control box controls the pressing plate to rotate and press the aircraft muffler at the same time; the electric / pneumatic control box controls the positioner to start rotating at a uniform speed; the electric / pneumatic control box controls the laser welding gun to start running and continuously weld the weld position; Step 2: After welding is completed, the electric / pneumatic control box controls the laser welding gun to stop running; the electric / pneumatic control box controls the positioner to stop rotating; the electric / pneumatic control box controls the pressure plate to release the aircraft muffler at the same time, and the operator removes the aircraft muffler to complete the welding process.

9. The method according to claim 8, characterized in that Each step is divided into three actions, and the three actions are automatically executed according to the preset sequence and interval time.

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