Laser ultrasonic stress regulation and control equipment

Abstract

The utility model relates to the technical field of stress regulation and control, in particular to laser ultrasonic stress regulation and control equipment which comprises a workbench, and the workbench is provided with a laser for emitting laser to the surface of a workpiece so as to regulate and control residual stress of the workpiece and a water spraying pipe for spraying water to the surface of the workpiece. When the residual stress of the workpiece is regulated and controlled, the surface of the workpiece is directly irradiated with laser through the laser to regulate and control the residual stress of the workpiece, the surface of the workpiece is continuously sprayed with water through the water spraying pipe to form a water film (water restraint layer) on the outer surface of the workpiece, and the laser is irradiated to the outer surface of the workpiece through the laser to control the residual stress of the workpiece. Therefore, the intensity of laser ultrasound is improved, the duration of laser ultrasound on the workpiece is prolonged, and the efficiency of regulating and controlling the residual stress of the workpiece is improved.

Description

Technical Field

[0001] The present application relates to the technical field of stress regulation, and in particular to a laser ultrasonic stress regulation device. Background Art

[0002] Metal components undergo welding, casting, forging, machining and other processes, which cause internal lattice deformation and inevitably produce residual stress, greatly reducing the ultimate strength and fatigue strength of the components, and may even cause cracks and brittle fractures. In addition, due to the relaxation of residual stress during processing and use, the parts are deformed, greatly affecting the size, position accuracy and overall performance of the components. Therefore, it is necessary to regulate the residual stress of the components so that the residual stress of the components is at a more appropriate value.

[0003] The methods for reducing residual stress mainly include annealing, mechanical treatment, shot peening, ultrasound, explosion method, etc. Among them, in the ultrasonic method, the transducer that generates ultrasound needs to be manually installed and fixed at a specified position on the workpiece surface. Especially when the outer surface of the workpiece is a curved surface, the fixing method of the transducer is more troublesome, resulting in a decrease in the efficiency of regulating the residual stress of the workpiece, so further improvement is needed. Utility Model Content

[0004] In order to improve the efficiency of regulating the residual stress of a workpiece, the present application provides a laser ultrasonic stress regulation device.

[0005] The laser ultrasonic stress control device provided in this application adopts the following technical solution:

[0006] A laser ultrasonic stress regulating device comprises a workbench, wherein the workbench is provided with a laser for emitting laser to a workpiece surface to regulate the residual stress of the workpiece and a water spraying pipe for spraying water to the workpiece surface.

[0007] By adopting the above technical scheme, when the residual stress of the workpiece is regulated, the laser is directly irradiated on the surface of the workpiece through the laser to regulate the residual stress of the workpiece, and the workpiece surface is continuously sprayed with water through a water pipe to form a water film (water confinement layer) on the outer surface of the workpiece, and the laser is irradiated on the outer surface of the workpiece through the laser, thereby increasing the intensity of the laser ultrasound and the duration of the laser ultrasound on the workpiece, thereby improving the efficiency of the residual stress regulation of the workpiece.

[0008] Preferably, the water spray pipe is a bamboo tube or a metal shaped hose.

[0009] By adopting the above technical solution, the bamboo tube or metal shaped hose has the performance of self-shaping after adjustment, which makes it easy to adjust the direction and position of the water outlet of the water spray pipe according to the working conditions, and facilitates water spraying operations at various positions of the workpiece.

[0010] Preferably, the workbench is provided with a mounting plate, the mounting plate has a liquid flow channel, a water inlet hole connected to the liquid flow channel is opened on one side of the mounting plate, a water outlet hole connected to the liquid flow channel is opened on the other side of the mounting plate, one end of the water spray pipe is connected to the water outlet hole, the mounting plate is provided with a water supply pipe connected to the water inlet hole, and the water supply pipe is externally connected to a water supply component.

[0011] By adopting the above technical solution, the mounting plate provides a mounting carrier for the water spray pipe and the water supply pipe, the water supply component continuously supplies water to the liquid flow channel through the water supply pipe, and water flows into the water spray pipe through the water outlet hole.

[0012] Preferably, the water inlet and outlet are both threaded holes, one end of the water spray pipe is coaxially fixedly connected with a threaded sleeve threadedly connected to the water outlet, and the end of the water supply pipe is fixedly connected with a pipe joint threadedly connected to the water inlet.

[0013] By adopting the above technical solution, the detachable connection of the water spray pipe, the mounting plate and the water supply pipe is achieved through the threaded sleeve and the pipe joint, which is convenient for maintenance and installation.

[0014] Preferably, the mounting plate is provided with a laser opening for the laser emitted by the laser to pass through, and the mounting plate is provided with a focusing head connected to the laser opening for focusing the laser.

[0015] By adopting the above technical solution, the mounting plate provides a mounting carrier for the focusing head, and the focusing head focuses the laser emitted by the laser to improve the energy density of the laser, thereby improving the regulation efficiency of the residual stress of the component.

[0016] Preferably, the workbench is provided with a first mechanical arm, the mounting plate is arranged at the free end of the first mechanical arm, and the water supply pipe is a hose.

[0017] By adopting the above technical solution, the free end of the first robot arm moves, driving the water spray pipe and the focusing head to move freely in three-dimensional space, thereby improving the degree of freedom of the water spray pipe and the focusing head, so as to perform all-round water spraying and stress control operations on the workpiece.

[0018] Preferably, the laser is fixedly connected to the workbench, and a light guide arm is connected between the laser and the mounting plate for guiding the laser emitted by the laser to the laser opening.

[0019] By adopting the above technical solution, the laser emitted by the laser is guided by the light guide arm and enters the laser port, and is focused by the focusing head and then emitted to the surface of the workpiece.

[0020] Preferably, the workbench is provided with a second robotic arm, the free end of the second robotic arm is provided with a claw plate for clamping and fixing the workpiece, the laser is fixedly connected to the workbench, the mounting plate is fixedly connected to the outer wall of the laser, and the light outlet of the laser is connected to the laser through port.

[0021] By adopting the above technical solution, after the workpiece is clamped and fixed on the second robotic arm by the claw plate, the free end of the second robotic arm drives the workpiece to move freely in three-dimensional space, thereby switching the relative position of the workpiece and the mounting plate, so that the water spray pipe and focusing head on the mounting plate can perform all-round water spraying and stress regulation operations on the workpiece.

[0022] Preferably, it also includes a control panel located at one side of the workbench, and the control panel is detachably connected to the workbench through a connecting component.

[0023] By adopting the above technical solution, the control panel and the workbench are detachably connected via a connecting assembly, which facilitates the fixing and separation of the control panel and the workbench according to different working conditions.

[0024] In summary, the utility model has the following beneficial effects:

[0025] 1. When regulating the residual stress of the workpiece, the laser is directly irradiated on the workpiece surface by the laser to regulate the residual stress of the workpiece, and the water is continuously sprayed on the workpiece surface by the water spray pipe to form a water film (water constraint layer) on the outer surface of the workpiece, and the laser is irradiated on the outer surface of the workpiece by the laser, thereby increasing the intensity of the laser ultrasound and the duration of the laser ultrasound on the workpiece, and improving the efficiency of the residual stress regulation of the workpiece;

[0026] 2. The free end of the first robot arm moves to drive the water spray pipe and the focusing head to move freely in three-dimensional space, thereby increasing the degree of freedom of the water spray pipe and the focusing head to perform all-round water spraying and stress control operations on the workpiece;

[0027] 3. After the workpiece is clamped and fixed on the second robotic arm by the claw plate, the free end of the second robotic arm drives the workpiece to move freely in three-dimensional space, thereby switching the relative position of the workpiece and the mounting plate, so that the water spray pipe and focusing head on the mounting plate can spray water and regulate stress on the workpiece in all directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of a laser ultrasonic stress regulation device in Example 1;

[0029] Figure 2 is a schematic diagram of the structure of the connection assembly in Example 1;

[0030] Figure 3 is a schematic diagram of the installation position of the mounting plate in Example 1;

[0031] Figure 4 is a schematic diagram of the connection structure of the water spray pipe, the water supply pipe and the mounting plate in Example 1;

[0032] Figure 5 It is a schematic diagram of the installation position of the mounting plate in Example 2.

[0033] In the figure, 10, workbench; 101, moving wheel; 102, lifting ring; 20, control panel; 30, connecting assembly; 301, connecting plate; 302, connecting seat; 1, first robotic arm; 2, mounting plate; 21, liquid flow channel; 22, water inlet hole; 23, water outlet hole; 24, laser port; 3, laser; 31, light guide arm; 4, water spray pipe; 41, screw sleeve; 5, water supply pipe; 51, pipe joint; 6, focusing head; 7, camera; 8, second robotic arm; 9, claw plate. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-5 This application is described in further detail.

[0035] Embodiment 1:

[0036] The present application embodiment discloses a laser ultrasonic stress control device, referring to Figure 1 , including a workbench 10 and a control panel 20 located on one side of the workbench 10 , the lower end surfaces of the workbench 10 and the control panel 20 are rotatably connected with moving wheels 101 , and the outer side wall of the workbench 10 is provided with a hanging ring 102 .

[0037] Reference Figure 1 , Figure 2 The control panel 20 is detachably connected to the workbench 10 through the connection assembly 30. In this embodiment, the upper end surface of the control panel 20 is higher than the upper end surface of the workbench 10. The connection assembly 30 includes a connection plate 301 located below the workbench 10 and the operation table and a connection seat 302 arranged on one side of the upper end surface of the workbench 10. The upper end surface of the connection plate 301 abuts against the lower end surfaces of the workbench 10 and the control panel 20. Both ends of the connection plate 301 are bolted to the lower end surfaces of the workbench 10 and the control panel 20. The lower end surface of the connection seat 302 abuts against the upper end surface of the workbench 10, and one side of the connection seat 302 abuts against the side wall of the control panel 20. The connection seat 302 is bolted to the workbench 10 and the control panel 20.

[0038] The workbench 10 is provided with a first robotic arm 1, a mounting plate 2 and a laser 3. In this embodiment, the base of the first robotic arm 1 is fixedly connected to the upper end surface of the workbench 10, the mounting plate 2 is fixedly connected to the free end of the first robotic arm 1 by bolts, and the laser 3 is fixedly connected to the upper end surface of the workbench 10 and is located on one side of the first robotic arm 1.

[0039] Reference Figure 3 , Figure 4The mounting plate 2 is provided with a water spray pipe 4 for spraying water on the surface of the workpiece. The water spray pipe 4 is a bamboo tube or a metal shaped hose. In this embodiment, the water spray pipe 4 is a metal shaped hose. Specifically, the mounting plate 2 has a liquid flow channel 21. The length direction of the liquid flow channel 21 is parallel to the width direction of the mounting plate 2. One side of the mounting plate 2 is provided with a water inlet 22 connected to the liquid flow channel 21. The other side of the mounting plate 2 is provided with a water outlet 23 connected to the liquid flow channel 21. The water inlet 22 and the water outlet 23 are both threaded holes. One end of the water spray pipe 4 is coaxially fixedly connected with a screw sleeve 41 threadedly connected to the water outlet 23. The mounting plate 2 is provided with a water supply pipe 5 connected to the water inlet 22. The end of the water supply pipe 5 is fixedly connected with a pipe joint 51 threadedly connected to the water inlet 22. The water supply pipe 5 is externally connected with a water supply part, which is a water supply box (not shown in the figure). The water supply box can be fixedly connected to the side wall of the workbench 10.

[0040] The mounting plate 2 is provided with a laser opening 24 through its thickness direction for the laser emitted by the laser 3 to pass through. The mounting plate 2 is provided with a focusing head 6 connected to the laser opening 24 to focus the laser. Specifically, the focusing head 6 can be locked to the mounting plate 2 by threaded engagement. In this embodiment, a light guide arm 31 is connected between the laser 3 and the mounting plate 2 for guiding the laser emitted by the laser 3 to the laser opening 24. The light guide arm 31 is used in conjunction with the first mechanical arm 1. The light guide arm 31 can cooperate with the movement of the following mechanical arm. The light inlet of the light guide arm 31 is connected to the light emitting port of the laser 3, and the light outlet of the light guide arm 31 is connected to the laser opening 24. The mounting plate 2 is fixedly connected with a camera 7. Specifically, the camera 7 is an industrial camera for photographing the workpiece.

[0041] The implementation principle of a laser ultrasonic stress regulation device in an embodiment of the present application is as follows: a workpiece is placed on the ground, and when the residual stress of the workpiece is regulated, the robot arm and the light guide arm 31 cooperate to realize the free movement of the mounting plate 2 relative to the workpiece in three-dimensional space, thereby increasing the degree of freedom of the water spray pipe 4 and the focusing head 6. The water spray pipe 4 is used to continuously spray water on the surface of the workpiece to form a water film (water constraint layer) on the outer surface of the workpiece. At the same time, the laser 3 is started, and the laser emitted by the laser 3 is transmitted through the light guide arm 31 and emitted into the laser port 24. After being focused by the focusing head 6, it is emitted to the surface of the workpiece, thereby increasing the intensity of the laser ultrasound and increasing the duration of the laser ultrasound on the workpiece, thereby improving the efficiency of residual stress regulation.

[0042] When residual stress detection is required for a workpiece at a higher position, the connecting plate 301 and the connecting seat 302 are unlocked to release the fixed restrictions of the workbench 10 and the control console 20, and the lifting rope is tied to the lifting ring 102. The lifting equipment lifts the workbench 10 through the lifting rope to perform residual stress control operations on the workpiece located at a high place.

[0043] Embodiment 2:

[0044] Reference Figure 5 The workbench 10 is provided with a second mechanical arm 8. The second mechanical arm 8 has the same structure as the first mechanical arm 1. The difference from the embodiment 1 is that the free end of the second mechanical arm 8 is fixedly connected with a clamping plate 9 for clamping and fixing the workpiece. Specifically, when the workpiece is a cylinder, the clamping plate 9 can adopt a pneumatic three-jaw chuck, and when the workpiece is a block, the clamping plate 9 can adopt a pneumatic two-jaw chuck or a pneumatic four-jaw chuck. The mounting plate 2 is fixedly connected to the side wall of the laser 3, and the light-emitting port of the laser 3 is directly connected to the laser port 24.

[0045] After the workpiece is clamped and fixed on the second robotic arm 8 by the claw plate 9, the free end of the second robotic arm 8 drives the workpiece to move freely in three-dimensional space relative to the mounting plate 2, thereby switching the relative position of the workpiece and the mounting plate 2, so that the water spray pipe 4 and focusing head 6 on the mounting plate 2 can perform all-round water spraying and stress regulation operations on the workpiece.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A laser ultrasonic stress control device, characterized in that: The invention comprises a workbench (10), wherein the workbench (10) is provided with a laser (3) for emitting laser light to a workpiece surface to regulate the residual stress of the workpiece, and a water spray pipe (4) for spraying water to the workpiece surface; the water spray pipe (4) is a bamboo tube or a metal shaped hose; the workbench (10) is provided with a mounting plate (2), the mounting plate (2) has a liquid flow channel (21), one side of the mounting plate (2) is provided with a water inlet hole (22) connected to the liquid flow channel (21), the other side of the mounting plate (2) is provided with a water outlet hole (23) connected to the liquid flow channel (21), one end of the water spray pipe (4) is connected to the water outlet hole (23), the mounting plate (2) is provided with a water supply pipe (5) connected to the water inlet hole (22), and the water supply pipe (5) is externally connected to a water supply member.

2. The laser ultrasonic stress control device according to claim 1, characterized in that: The water inlet hole (22) and the water outlet hole (23) are both threaded holes, one end of the water spray pipe (4) is coaxially fixedly connected to a threaded sleeve (41) threadedly connected to the water outlet hole (23), and the end of the water supply pipe (5) is fixedly connected to a pipe joint (51) threadedly connected to the water inlet hole (22).

3. The laser ultrasonic stress control device according to claim 1, characterized in that: The mounting plate (2) is provided with a laser opening (24) for the laser light emitted by the laser device (3) to pass through, and the mounting plate (2) is provided with a focusing head (6) which is connected to the laser opening (24) for focusing the laser light.

4. The laser ultrasonic stress control device according to claim 3, characterized in that: The workbench (10) is provided with a first mechanical arm (1), the mounting plate (2) is arranged at the free end of the first mechanical arm (1), and the water supply pipe (5) is a hose.

5. The laser ultrasonic stress control device according to claim 4, characterized in that: The laser (3) is fixedly connected to the workbench (10), and a light guide arm (31) is connected between the laser (3) and the mounting plate (2) and is used to guide laser light emitted by the laser (3) to the laser opening (24).

6. The laser ultrasonic stress control device according to claim 3, characterized in that: The workbench (10) is provided with a second mechanical arm (8), and a claw plate (9) for clamping and fixing a workpiece is provided at the free end of the second mechanical arm (8); the laser (3) is fixedly connected to the workbench (10), the mounting plate (2) is fixedly connected to the outer wall of the laser (3), and the light outlet of the laser (3) is connected to the laser opening (24).

7. The laser ultrasonic stress control device according to claim 1, characterized in that: It also includes a control panel (20) located on one side of the workbench (10), wherein the control panel (20) is detachably connected to the workbench (10) via a connection assembly (30).

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