Positioner, system and laser shock peening method for laser shock peening

Abstract

The present invention relates to a positioner, a system and a laser shock peening method for laser shock peening. The rotary drive mechanism and the two roller support mechanisms are both installed on the base. The rotary drive mechanism is installed on one side of one of the roller support mechanisms. The two clamps are respectively installed on the two roller support mechanisms. The two clamps are used for clamping a workpiece. The turntable is installed on the rotary drive mechanism. One end of the universal shaft is connected to the turntable and the other end thereof is connected to one of the clamps. The turntable is used for driving the universal shaft to rotate under the condition that the rotary drive mechanism is started. The universal shaft drives the clamp and the workpiece to rotate. The present invention is applied to laser shock peening to solve the problem of difficult installation when processing large workpieces. By controlling the system to rotate the workpiece and move the optical path, the problem of complex operation when processing different regions is solved, thereby improving the processing efficiency.

Description

Technical Field

[0001] The present invention relates to the field of laser shock peening equipment, and particularly relates to a positioner for laser shock peening, a system and a laser shock peening method. Background Art

[0002] Laser shock peening technology is one of the most advanced surface strengthening technologies for metal materials at present. It uses short pulses (ns level) and high peak power density (above 109 W / cm 2 2) lasers to penetrate the constraint layer and impact the laser absorption protective film covering the metal surface, generating a high-pressure transient plasma shock wave. The shock wave pressure up to GPa generates high-strain plastic deformation on the surface layer of the metal material, forming a large residual compressive stress. At the same time, the microstructure changes greatly, which can significantly improve the surface treatment technology of the fatigue performance of metal materials such as resistance to external force damage and corrosion resistance.

[0003] During the process of laser shock peening large workpieces, different workpieces have different sizes, which are difficult to install. When machining different parts, it is necessary to change the optical path and re-adjust the light, with complex operations, cumbersome processes, and low processing efficiency.

[0004] The positioners of the prior art usually adopt a structure with an integral base, resulting in high processing costs, limited processing accuracy, and inability to meet the requirements of machining workpieces of different sizes. When adjusting the installation height of the workpiece, it is also cumbersome and complex. Summary of the Invention

[0005] In view of this, the present invention provides a positioner for laser shock peening, a system and a laser shock peening method, aiming to solve the problems existing in the prior art, such as different workpiece sizes, difficult installation, the need to change the optical path and re-adjust the light when machining different parts, complex operations, cumbersome processes, and low processing efficiency during the laser shock peening process.

[0006] Specifically, a positioner for laser shock peening includes a rotation drive mechanism, two roller support mechanisms, a base, two clamps, a turntable and a universal shaft. The rotation drive mechanism and the two roller support mechanisms are both installed on the base. The rotation drive mechanism is installed on one side of one of the roller support mechanisms. The two clamps are respectively installed on the two roller support mechanisms. The two clamps are used for clamping the workpiece. The turntable is installed on the rotation drive mechanism. One end of the universal shaft is connected to the turntable and the other end is connected to one of the clamps. The turntable is used to drive the universal shaft to rotate under the condition that the rotation drive mechanism is started, and the universal shaft drives the clamp and the workpiece to rotate.

[0007] On the basis of the above solution, the roller support mechanism includes a roller box, a support base, a lead screw, two lead screw flange seats and a roller assembly. The roller box is installed on the support base. The lead screw passes through the roller box and is used in cooperation with the two lead screw flange seats. The roller assembly is connected to the end of the lead screw flange seat away from the lead screw.

[0008] On the basis of the above solution, the roller assembly includes two roller structures. Each roller structure includes a roller, a first bearing, a roller shaft and a roller seat. The roller is installed on the roller shaft through the first bearing. The roller shaft is installed at the top of the roller seat. A groove is formed in the lower part of the roller seat for installing the lead screw flange seat.

[0009] On the basis of the above solution, it further includes two adjusting structures installed at the bottom of the roller box. Each adjusting structure includes an adjusting block, a setscrew and a screw. The adjusting block is fixed to the bottom of the roller box through the screw. A setscrew is installed inside the adjusting block, and the setscrew abuts against the side of the support base.

[0010] On the basis of the above solution, the lead screw is a double-threaded lead screw with opposite thread directions on both sides;

[0011] The two lead screw flange seats are respectively located at the threads with opposite directions.

[0012] On the basis of the above solution, it further includes two bearing mounts and two second bearings. The two bearing mounts are installed on both sides of the roller box. The two second bearings are sleeved at both ends of the lead screw and are respectively installed in the two bearing mounts.

[0013] On the basis of the above solution, sliding rails are installed on the base in parallel. A slider for cooperating with the sliding rails is provided at the bottom of the support base.

[0014] On the basis of the above solution, it further includes handwheels installed at both ends of the lead screw. The handwheels are fixedly connected to the lead screw.

[0015] A laser shock peening system uses the above-mentioned positioner for laser shock peening and further includes a laser, a light guiding device, a water purification device, a water confinement layer loading device and a control system. The light guiding device guides and focuses the laser emitted by the laser onto the surface of the workpiece. The water purification device is connected to the water confinement layer loading device through a water pipe. The water confinement layer loading device loads the water confinement layer onto the surface of the workpiece. The control system is communicatively connected to the rotation drive mechanism, the light guiding device, the water confinement layer loading device and the laser.

[0016] A laser shock peening method uses the above-mentioned positioner for laser shock peening;

[0017] When laser shock peening a workpiece, place the workpiece on the roller support mechanism through a fixture. Rotate the handwheel, and the lead screw rotates to drive the lead screw flange seat to move, thereby changing the roller seat spacing to adjust the installation height of the workpiece;

[0018] By adjusting the setscrew, move the roller box in the horizontal direction, thereby adjusting the position of the workpiece in the horizontal direction;

[0019] Drive the rotary drive mechanism to drive the turntable to rotate. The turntable drives the universal shaft to rotate. The universal shaft drives the fixture to rotate, and the fixture drives the workpiece to rotate. Control the light guiding device to move the light spot through the control system, thereby automatically machining different areas of the workpiece.

[0020] Compared with the prior art, the advantages of the present invention are as follows:

[0021] A positioner for laser shock peening according to the present invention, when laser shock peening a workpiece, place the workpiece on the roller support mechanism through a fixture. One end flange of the fixture is connected to the free end of the universal shaft. Adjust the installation height of the workpiece by adjusting the roller spacing at both ends; drive the rotary drive mechanism to drive the turntable to rotate. The turntable drives the universal shaft to rotate. The universal shaft drives the fixture to rotate, and the fixture drives the workpiece to rotate. Move the light guiding device through the control system to move the light spot, thereby automatically operating and machining different areas of the workpiece;

[0022] The lead screw adopts a double-start lead screw design. The fixture is placed between two rollers. Rotate the handwheel, and the double-start lead screw rotates to drive the lead screw flange seat to move relatively, thereby changing the roller seat spacing to achieve the purpose of adjusting the installation height of the workpiece; the adjusting block is installed and fixed on the bottom side of the roller box through screws. A setscrew is installed inside the adjusting block and abuts against both sides of the support base. By adjusting the setscrew, move the roller box and the rollers left and right, thereby adjusting the position of the workpiece in the left and right directions;

[0023] Adopt the universal shaft connection method, which is convenient for installation and ensures that power can be transmitted smoothly and reliably to drive the workpiece to rotate even when the angle and distance between the two axes of the turntable and the workpiece change;

[0024] A sliding guide rail is installed on the base, which is convenient for adjusting the distance between the two roller support mechanisms. Moreover, the base adopts a structure separated into two parts, which can meet the straightness requirement in machining, save machining costs, and on the other hand, can meet the use requirements of workpieces of different lengths, with a wider range of use;

[0025] The light guiding device uses a three-axis guide device to change the optical path. Combined with the operation of the control system, when laser shock peening the workpiece, by operating the control system, the optical path can be moved to change the position of the light spot, thereby machining different areas;

[0026] The present invention applies a positioner to the field of laser shock peening, which can solve the problems of complex clamping and cumbersome operation when processing different parts of large workpieces; the structure of the present invention is reasonable, the operation is simple, and it is convenient to use, realizing the quickness and convenience as well as the firm clamping when installing large workpieces; during laser shock peening, through automatic control, it is more efficient and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered as a limitation to the present invention.

[0028] Figure 1 It is a schematic structural diagram of the positioner for laser shock peening of the present invention;

[0029] Figure 2 is Figure 1 a schematic structural diagram of the roller support mechanism in

[0030] Figure 3 is Figure 2 an enlarged view of the adjustment structure in

[0031] Figure 4 It is a schematic structural diagram of a laser shock peening system in Embodiment 2.

[0032] In the figure: 1 - Rotary drive mechanism;

[0033] 2 - Roller support mechanism, 210 - Roller box, 220 - Support base, 230 - Lead screw, 240 - Lead screw flange seat, 250 - Roller assembly, 251 - Roller, 252 - First bearing, 253 - Roller shaft, 254 - Roller seat, 260 - Adjustment structure, 261 - Adjustment block, 262 - Set screw, 263 - Screw;

[0034] 3 - Base, 4 - Fixture, 5 - Turntable, 6 - Universal shaft, 7 - Bearing mounting seat, 8 - Second bearing, 9 - Slide rail, 10 - Handwheel, 11 - Laser, 12 - Light guiding device, 13 - Water purification device, 14 - Water confinement layer loading device, 15 - Control system. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be fully conveyed to those skilled in the art. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0036] Embodiment 1

[0037] As Figures 1-3 shown, a positioner for laser shock peening includes a rotary drive mechanism 1, two roller support mechanisms 2, a base 3, two fixtures 4, a turntable 5, and a universal shaft 6. The rotary drive mechanism 1 and the two roller support mechanisms 2 are both installed on the base 3. The rotary drive mechanism 1 is installed on one side of one of the roller support mechanisms 2. The two fixtures 4 are respectively installed on the two roller support mechanisms 2. The two fixtures 4 are used to clamp the workpiece. The turntable 5 is installed on the rotary drive mechanism 1. One end of the universal shaft 6 is connected to the turntable 5 and the other end is connected to one of the fixtures 4. The turntable 5 is used to drive the universal shaft 6 to rotate under the condition that the rotary drive mechanism 1 is started. The universal shaft 6 drives the fixture 4 to rotate, thereby driving the workpiece to rotate.

[0038] As Figure 1 shown, the turntable 5 is installed on the rotary drive mechanism 1. One end of the universal shaft 6 is connected to the turntable 5 and the other end is connected to the flange on the fixture 4. The workpiece is placed on the roller support mechanism 2 through the fixture 4. The fixture 4 is installed on the side end face of the workpiece by screws. The use of the universal shaft 6 ensures that power can still be reliably transmitted to drive the workpiece to rotate when the angle and distance between the turntable 5 and the fixture 4 change.

[0039] Preferably, the turntable 5 and the fixture 4 of the positioner are connected by a universal shaft 6.

[0040] As Figure 2 shown, the roller support mechanism 2 includes a roller box 210, a support base 220, a lead screw 230, two lead screw flange seats 240, and a roller assembly 250. The roller box 210 is installed on the support base 220. The lead screw 230 passes through the roller box 210 and is used in cooperation with the two lead screw flange seats 240. The roller assembly 250 is connected to the end of the lead screw flange seat 240 away from the lead screw 230.

[0041] Specifically, the roller assembly 250 includes two roller structures. The roller structure includes a roller 251, a first bearing 252, a roller shaft 253, and a roller seat 254. The roller 251 is mounted on the roller shaft 253 through the first bearing 252. The roller shaft 253 is mounted on the top of the roller seat 254. A groove is formed in the lower part of the roller seat 254 for mounting a lead screw flange seat 240. The lead screw flange seat 240 is fixedly connected in the groove by screws.

[0042] The roller 251 is mounted on the roller shaft 253 through the first bearing 252, and the roller shaft 253 is mounted on the roller seat 254. When the workpiece rotates, the roller 251 rotates following it through the first bearing 252, reducing the resistance during the rotation of the workpiece and the wear of the rotating part.

[0043] Specifically, it further includes two bearing mounts 7 and two second bearings 8. The two bearing mounts 7 are mounted on both sides of the roller box 210. The two second bearings 8 are sleeved on both ends of the lead screw 230 and respectively mounted in the two bearing mounts 7.

[0044] In this structure, the roller 251 is mounted on the roller seat 254 through the roller shaft 253. The upper end of the lead screw flange seat 240 is mounted in the groove of the roller seat 254, and the lower end is mounted on the lead screw 230 through a threaded hole. Both ends of the lead screw 230 are mounted on the roller box 210 through the second bearings 8 and the bearing mounts 7. The roller box 210 is mounted on the support base 220.

[0045] As Figure 3 shown, it further includes two adjusting structures 260 mounted at the bottom of the roller box 210. The adjusting structure 260 includes an adjusting block 261, a setscrew 262, and a screw 263. The adjusting block 261 is fixed to the bottom of the roller box 210 by the screw 263. A setscrew 262 is installed inside the adjusting block 261. The adjusting block 261 is mounted at the bottom of the roller box 210 by the screw 263. The setscrew 262 abuts against the side of the support base 220.

[0046] Preferably, the screw 263 is an internal hexagonal screw.

[0047] Specifically, the lead screw 230 is a double - threaded lead screw 230 with opposite thread directions on both sides;

[0048] The two lead screw flange seats 240 are respectively located at the threads with opposite directions. One lead screw flange seat 240 is installed at each of the opposite - threaded parts to drive the relative movement of the roller 251.

[0049] Specifically, sliding rails 9 are installed on the base 3 in parallel. The bottom of the support base 220 is provided with sliders that cooperate with the sliding rails 9.

[0050] A sliding guide rail 9 is installed on the positioner base 3, which facilitates adjusting the distance between the two roller support mechanisms 2. Preferably, the base 3 adopts a structure separated into two parts, which can meet the straightness requirement in processing, save processing costs, and on the other hand, can meet the usage requirements of workpieces of different lengths, with a wider range of applications.

[0051] Preferably, it further includes handwheels 10 installed at both ends of the lead screw 230. The handwheels 10 are fixedly connected to the lead screw 230, which facilitates manual rotation.

[0052] Embodiment 2

[0053] As Figure 4 shown, a laser shock peening system uses the positioner for laser shock peening, and further includes a laser 11, a light guiding device 12, a water purification device 13, a water confinement layer loading device 14, and a control system 15. The light guiding device 12 guides and focuses the laser emitted by the laser 11 onto the surface of the workpiece. The water purification device 13 is connected to the water confinement layer loading device 14 through a water pipe. The water confinement layer loading device 14 loads the water confinement layer onto the surface of the workpiece. The control system 15 is communicatively connected to the rotation driving mechanism 1, the light guiding device 12, the water confinement layer loading device 14, and the laser 11.

[0054] Preferably, the light guiding device 12 uses a rail device adjustable in three directions of X, Y, and Z. The light guiding device 12 changes the light path by using the three-axis rail device and is operated in combination with the control system 15. When laser shock peening the workpiece, by operating the control system 15, the light path can be moved to change the position of the light spot, so as to process different areas.

[0055] Preferably, the water confinement layer loading device 14 is fixed by a magnetic adsorption method. During the process of laser shock peening the workpiece, the water purification device 13 is connected to the water confinement layer loading device 14. The water confinement layer loading device 14 loads the water confinement layer onto the surface of the workpiece, and it is convenient and fast to change the loading position of the water confinement layer according to different processing positions.

[0056] Other components of the laser shock peening system are all conventional components of the laser shock peening system, which will not be elaborated here.

[0057] Embodiment 3

[0058] A laser shock peening method uses the positioner for laser shock peening;

[0059] When laser shock peening the workpiece, the workpiece is placed on the roller support mechanism 2 through the fixture 4. The handwheel 10 is rotated, and the lead screw 230 rotates to drive the lead screw flange seat 240 to move, thereby changing the distance between the roller seats 254 to adjust the installation height of the workpiece.

[0060] By adjusting the setscrew 262, the roller box 210 is moved in the horizontal direction, thereby adjusting the position of the workpiece in the horizontal direction;

[0061] Drive the rotary drive mechanism 1 to drive the turntable 5 to rotate. The turntable 5 drives the universal shaft 6 to rotate. The universal shaft 6 drives the fixture 4 to rotate, and the fixture 4 drives the workpiece to rotate. Control the movement of the light guide device 12 through the control system 15 to move the light spot, thereby automatically operating to process different areas of the workpiece.

[0062] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A positioner for laser shock peening, characterized in that, it includes a rotary drive mechanism, two roller support mechanisms, a base, two fixtures, a turntable and a universal shaft. The rotary drive mechanism and the two roller support mechanisms are both installed on the base. The rotary drive mechanism is installed on one side of one of the roller support mechanisms. The two fixtures are respectively installed on the two roller support mechanisms. The two fixtures are used for clamping workpieces. The turntable is installed on the rotary drive mechanism. One end of the universal shaft is connected to the turntable and the other end is connected to one of the fixtures; The roller support mechanism includes a roller box, a support base, a lead screw, two lead screw flange seats and a roller assembly. The roller box is installed on the support base. The lead screw passes through the roller box and is used in cooperation with the two lead screw flange seats. The roller assembly is connected to the end of the lead screw flange seat away from the lead screw; The roller assembly includes two roller structures. The roller structure includes a roller, a first bearing, a roller shaft and a roller seat. The roller is installed on the roller shaft through the first bearing. The roller shaft is installed on the top of the roller seat. A groove is formed in the lower part of the roller seat for installing the lead screw flange seat; Parallel sliding guides are installed on the base. Sliders matching the sliding guides are provided at the bottom of the support base.

2. The positioner for laser shock peening according to claim 1, characterized in that, it further includes two adjusting structures installed at the bottom of the roller box. The adjusting structure includes an adjusting block, a setscrew and a screw. The adjusting block is fixed to the bottom of the roller box through the screw. A setscrew is installed inside the adjusting block and the setscrew abuts against the side of the support base.

3. The positioner for laser shock peening according to claim 1, characterized in that, the lead screw is a double-threaded lead screw with opposite thread directions on both sides; the two lead screw flange seats are respectively located at the threads with opposite directions.

4. The positioner for laser shock peening according to claim 1, characterized in that, it further includes two bearing mounts and two second bearings. The two bearing mounts are installed on both sides of the roller box. The two second bearings are sleeved on both ends of the lead screw and are respectively installed in the two bearing mounts.

5. The positioner for laser shock peening according to claim 1, characterized in that, it further includes handwheels installed at both ends of the lead screw. The handwheels are fixedly connected to the lead screw.

6. A laser shock peening system using the positioner for laser shock peening according to any one of claims 1-5, characterized in that, it further includes a laser, a light guiding device, a water purification device, a water confinement layer loading device and a control system. The light guiding device guides and focuses the laser emitted by the laser onto the surface of the workpiece. The water purification device is connected to the water confinement layer loading device through a water pipe. The water confinement layer loading device loads the water confinement layer onto the surface of the workpiece. The control system is communicatively connected to the rotary drive mechanism, the light guiding device, the water confinement layer loading device and the laser.

7. A laser shock peening method, characterized in that, the positioner for laser shock peening according to any one of claims 1-5 is adopted; When laser shock peening a workpiece, place the workpiece on the roller support mechanism through a fixture. Rotate the handwheel, and the lead screw rotates to drive the movement of the lead screw flange seat, thereby changing the roller seat spacing to adjust the installation height of the workpiece; By adjusting the setscrew, move the roller box in the horizontal direction, thereby adjusting the position of the workpiece in the horizontal direction; Drive the rotation drive mechanism to drive the turntable to rotate. The turntable drives the universal shaft to rotate. The universal shaft drives the fixture to rotate, and the fixture drives the workpiece to rotate. Control the movement of the light guiding device through the control system to move the light spot, thereby automatically operating and machining different areas of the workpiece.

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