A mobile optical path type laser shock peening device

Abstract

The application relates to the technical field of laser impact equipment, in particular to a mobile light path type laser impact strengthening equipment. The mobile light path type laser impact strengthening equipment comprises a hollow pipe, a laser generator installed at the top end of the hollow pipe, and a plurality of connecting pieces installed at the top end of the hollow pipe; a suspension arm rotatably installed at the bottom end of the hollow pipe, a first sliding groove formed in the suspension arm, a cross arm slidably installed in the first sliding groove, a second sliding groove formed in the cross arm, a hanging frame slidably installed on the second sliding groove, and high-vibration mirror pieces one, two and three respectively installed on the suspension arm, the cross arm and the hanging frame to reflect the laser emitted by the hollow pipe. The suspension arm is axially rotatably arranged on the hollow pipe, the cross arm is slidably arranged on the suspension arm and can move laterally, and the hanging frame is radially arranged on the cross arm. The light path is moved through the high-vibration mirror pieces, and the flexibility of the laser impact is improved.

Description

Technical Field

[0001] This invention relates to the field of laser shock equipment technology, and in particular to a mobile optical path type laser shock strengthening device. Background Technology

[0002] Laser shock peening is a surface modification technique that uses a high-energy pulsed laser beam to irradiate a metal surface, inducing a high-intensity compressive stress shock wave to achieve surface plastic deformation. Its principle is to generate transient pressure exceeding the material's yield strength (typically 1-3 GPa) through a plasma detonation wave under the action of a confining layer, forming a residual compressive stress layer with a depth of 1-2 mm and a nanoscale grain refinement structure on the metal surface. This technique features non-contact processing, minimal impact on surface roughness (change of approximately 0.5 μm), and adaptability to complex geometries. Compared to traditional shot peening, it can improve fatigue life by 5-10 times.

[0003] Currently available laser strengthening equipment uses a fixed optical path and performs laser processing by moving the workpiece. This makes it difficult to move large workpieces (such as the metal surface of fan blades or welded joints of components), and requires the design of complex tooling and moving devices to control the displacement of the workpiece for laser shock strengthening. This makes the laser shock strengthening equipment inflexible.

[0004] Therefore, it is necessary to provide a new mobile optical path laser shock enhancement device to solve the above-mentioned technical problems. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a mobile optical path laser shock enhancement device.

[0006] The mobile optical path laser shock enhancement device provided by the present invention includes a hollow tube and a laser generator installed at the top of the hollow tube. The laser beam emitted by the laser generator can be emitted along the axis of the hollow tube, and a plurality of connecting plates are installed at the top of the hollow tube.

[0007] A suspension arm is rotatably mounted on the bottom end of the hollow tube. A first sliding groove is provided inside the suspension arm, and a cross brace is slidably mounted on the first sliding groove. A second sliding groove is provided on the cross brace, and a suspension frame is slidably mounted on the second sliding groove. High-vibration mirrors one, two, and three reflecting the laser emitted from the hollow tube are respectively mounted on the suspension arm, the cross brace, and the suspension frame. A laser tube for receiving the laser reflected by the three high-vibration mirrors is mounted at the bottom end of the suspension frame. A focusing lens for adjusting the size of the laser spot is slidably mounted inside the laser tube. A drive component one for driving the suspension arm to rotate around the hollow tube is mounted on the hollow tube. A drive component two for driving the cross brace to slide along the first sliding groove is mounted on the suspension arm. A drive component three for driving the suspension frame to slide along the second sliding groove is mounted on the cross brace.

[0008] Preferably, a connecting plate is installed on each of the connecting pieces, and a ring is installed on the connecting plate. The ring is coaxially arranged with the hollow tube, and an L-shaped tie rod is fixedly installed on one end of the cantilever arm facing the ring. The L-shaped tie rod is slidably engaged with the upper surface of the ring.

[0009] Preferably, the bottom end of the L-shaped pull rod is fitted with a number of balls, and the ring has grooves that roll with the balls.

[0010] Preferably, the bottom ends of the suspension arm and the cross arm are respectively equipped with a protective cover one and a protective cover two, and the protective cover one and the protective cover two are provided with through slots through which the laser light path passes.

[0011] Preferably, a light-emitting lens is provided inside the laser tube below the focusing lens, and the bottom end of the laser tube is connected to a jet tube, which is connected to an inert gas through a conduit.

[0012] Preferably, the drive component one includes a fixed gear fixedly mounted on the suspension arm and a motor fixedly mounted on one side of the hollow tube, wherein the output shaft of the motor one is fixedly mounted on a transmission gear meshing with the fixed gear.

[0013] Preferably, the second driving component includes a lead screw 1 rotatably mounted in the first slide groove, the sliding end of the cross arm extending into the first slide groove is provided with a threaded through hole that is threadedly connected to the lead screw 1, and a second motor 2 that drives the lead screw 1 to rotate is fixedly mounted on one end of the suspension arm.

[0014] Preferably, a diagonal brace is installed on the cross brace arm, one end of the diagonal brace is fixedly connected to the sliding end of the cross brace arm that extends into the first sliding groove, and the other end of the diagonal brace is fixedly connected to the end of the cross brace arm that is away from the suspension arm.

[0015] Preferably, two side plates are symmetrically installed on the side of the suspension arm facing the cross arm, and a support rod is fixedly installed between the two side plates. The inclined plate has a rod hole through which the support rod passes.

[0016] Preferably, the driving component three includes a lead screw two rotatably mounted in the second slide groove, a threaded through hole for threaded connection with the lead screw two at one end of the suspension bracket extending into the second slide groove, and a motor three for driving the lead screw two to rotate mounted on the cross arm.

[0017] Compared with related technologies, the mobile optical path laser shock enhancement device provided by the present invention has the following beneficial effects:

[0018] 1. The laser optical path of the present invention can rotate axially along the hollow tube and move laterally along the suspension arm following the cross arm. Then, when the suspension frame moves along the cross arm, it moves radially, thereby realizing the movable optical path and thus realizing the flexible movement of the laser to perform efficient impact strengthening on the workpiece.

[0019] 2. In order to improve the stability of the optical path movement in this invention, when the cantilever arm rotates around the hollow tube, it uses an L-shaped tie rod to slide synchronously on the ring, thereby improving the stability of the cantilever arm movement. The cross arm, with the cooperation of the inclined plate and the support rod, reduces swaying during movement, thereby improving the stability of the optical path movement end. Attached Figure Description

[0020] Figure 1 A schematic diagram of a preferred embodiment of the mobile optical path laser shock enhancement device provided by the present invention;

[0021] Figure 2 This is a schematic diagram of the mobile optical path laser shock enhancement device provided by the present invention from another perspective.

[0022] Figure 3 A schematic diagram of a hollow tube with a cantilever arm and auxiliary components provided by the present invention;

[0023] Figure 4 A schematic diagram of a structure in which a cross brace is mounted on a suspension arm provided by the present invention;

[0024] Figure 5 Another structural schematic diagram of the cross arm mounted on the suspension arm provided by the present invention;

[0025] Figure 6 A schematic diagram of the optical path structure of the mobile optical path laser shock enhancement device provided by the present invention;

[0026] Figure 7 This is a cross-sectional view of the laser tube provided by the present invention.

[0027] Figure 8 The bottom view of the mobile optical path laser shock strengthening device provided by the present invention.

[0028] Numbered in the diagram: 1. Hollow tube; 2. Laser generator; 3. Connecting piece; 31. Connecting plate; 32. Ring; 301. Groove; 4. Suspension arm; 41. High-vibration mirror lens one; 42. Side plate; 43. Support rod; 44. L-shaped tie rod; 441. Ball bearing; 45. Protective cover one; 451. Infrared positioning laser; 401. First slide groove; 5. Horizontal support arm; 51. High-vibration mirror lens two; 52. Inclined tie plate; 53. Protective cover two; 501. Second slide groove; 6. Suspension frame; 61. High-vibration mirror lens three; 62. Laser tube; 63. Focusing lens; 64. Light-emitting lens; 65. Jet tube; 7. Drive component one; 71. Fixed gear; 72. Motor one; 73. Transmission gear; 8. Drive component two; 81. Lead screw one; 82. Motor two; 9. Drive component three; 91. Lead screw two; 92. Motor three. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0030] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0031] Please see Figures 1 to 8 The present invention provides a mobile optical path laser shock strengthening device, which includes a hollow tube 1 and a laser generator 2 installed at the top of the hollow tube 1. The laser light emitted by the laser generator 2 can be emitted along the axis of the hollow tube 1, and a plurality of connecting pieces 3 are installed at the top of the hollow tube 1.

[0032] In an embodiment of the present invention, please refer to Figures 1 to 8 It also includes a suspension arm 4, rotatably mounted on the bottom end of the hollow tube 1. A first sliding groove 401 is formed inside the suspension arm 4, and a cross brace 5 is slidably mounted on the first sliding groove 401. A second sliding groove 501 is formed on the cross brace 5, and a suspension frame 6 is slidably mounted on the second sliding groove 501. High-voltage mirrors 41, 51, and 61, respectively, are mounted on the suspension arm 4, the cross brace 5, and the suspension frame 6 to reflect the laser emitted from the hollow tube 1. A laser tube 62 is installed at the bottom of the frame 6 to receive the laser reflected by the high-vibration mirror 61. A focusing mirror 63 for adjusting the size of the laser spot is slidably installed inside the laser tube 62. A drive component 7 for driving the suspension arm 4 to rotate around the hollow tube 1 is installed on the hollow tube 1. A drive component 8 for driving the cross arm 5 to slide along the first slide groove 401 is installed on the suspension arm 4. A drive component 9 for driving the suspension frame 6 to slide along the second slide groove 501 is installed on the cross arm 5.

[0033] It should be noted that during use, the equipment is fixed to the laser worktable via connecting piece 3, or connected to a robotic arm. Then, the control device for controlling the laser equipment's impact operation is electrically connected to the entire equipment. After connection, the workpiece is placed at the bottom of the laser shock strengthening equipment. Then, according to the part of the workpiece that needs to be impact strengthened, drive component 1 7, drive component 2 8, and drive component 3 9 are controlled to drive. The suspension arm 4 rotates axially around the hollow tube 1, and the cross arm 5 slides along the suspension arm 4 to achieve lateral movement around the hollow tube 1. The suspension frame 6 slides along the cross arm 5 to achieve radial movement around the hollow tube 1. The laser tube 62 moves with the suspension frame 6, thereby performing moving laser shock strengthening on the workpiece. When the laser tube 62 moves, the entire laser beam path follows the rotation of the high-vibration mirror 1 41, is directed towards the high-vibration mirror 2 51, passes through the high-vibration mirror 2 51, is directed towards the high-vibration mirror 3 61, and then towards the laser tube 62. After the focusing lens 63 adjusts the spot size, the laser beam is emitted from the laser tube 62 to perform laser shock strengthening on the workpiece.

[0034] It is worth noting that the entire laser beam path here is as follows: emitted from the laser generator 2, it is vertically directed along the axis of the hollow tube 1 towards the high-voltage mirror 41 (the beam path always follows the axis of the hollow tube 1), then reflected by the high-voltage mirror 41 to the horizontal direction towards the high-voltage mirror 51 (the beam path rotates circumferentially around the axis of the hollow tube 1), then reflected again by the high-voltage mirror 51 to the horizontal direction towards the high-voltage mirror 61 (the beam path moves along the direction of the cantilever arm 4, lengthening or shortening). Finally, it is reflected again by the high-voltage mirror 61 to the vertical direction towards the laser tube 62 (the beam path moves along the direction of the horizontal support arm 5, lengthening or shortening).

[0035] Furthermore, in order to improve the stability of the optical path movement, a connecting plate 31 is installed on each of the connecting pieces 3, and a ring 32 is installed on the connecting plate 31. The ring 32 is coaxially arranged with the hollow tube 1, and an L-shaped tie rod 44 is fixedly installed on one end of the cantilever arm 4 facing the ring 32. The L-shaped tie rod 44 slides with the upper surface of the ring 32.

[0036] The bottom end of the L-shaped tie rod 44 is fitted with several balls 441, and the ring 32 has a groove 301 that rolls with the balls 441. When the drive component 7 drives the suspension arm 4 to rotate around the hollow tube 1, the L-shaped tie rod 44 slides synchronously in the groove 301 with the balls 441, thereby improving the rotational stability of the overall suspension arm 4, thus improving the stability of the laser optical path movement, and reducing the overall sliding friction by using the balls 441 to improve its rotational response speed.

[0037] In an embodiment of the present invention, please refer to Figure 1The bottom ends of the suspension arm 4 and the cross arm 5 are respectively equipped with a protective cover 45 and a protective cover 53, and the protective cover 45 and the protective cover 53 are provided with through slots through which the laser light path passes.

[0038] It should be noted that protective shield 1 45 and protective shield 2 53 are used here to protect the moving optical path and prevent external impurities from interfering with the moving optical path.

[0039] It should also be noted that: an infrared positioning laser 451, coaxially arranged with the hollow tube 1, is installed at the bottom of the protective cover 45. It is used to position the workpiece by laser beam during laser shock strengthening, which facilitates automatic laser shock programming in the later stage and realizes rapid and automated laser shock operation.

[0040] In an embodiment of the present invention, please refer to Figures 1 to 8 The laser tube 62 has a light-emitting lens 64 located below the focusing lens 63, and the bottom end of the laser tube 62 is connected to a jet tube 65, which is connected to an inert gas through a conduit.

[0041] It should be noted that after the laser is adjusted by the focusing lens 63, it is emitted from the light-emitting lens 64. When it is emitted, since the workpiece needs to be water-cooled during the laser shock strengthening operation, in order to prevent the airflow generated by the high temperature from entering the laser tube 62, an inert gas with the same frequency as the laser pulse is injected into the jet tube 65. At the same time as the laser shock, the airflow is dispersed, thereby improving the effect of laser shock strengthening.

[0042] It should also be noted that the laser tube 62 is equipped with an electric lever for moving the focusing lens 63, thereby adjusting the size of the laser spot directed towards the light-emitting lens 64.

[0043] In an embodiment of the present invention, please refer to Figures 1 to 8 The drive component 7 includes a fixed gear 71 fixedly mounted on the suspension arm 4 and a motor 72 fixedly mounted on one side of the hollow tube 1. The output shaft of the motor 72 is fixedly mounted on a transmission gear 73 that meshes with the fixed gear 71.

[0044] The second driving component 8 includes a lead screw 81 rotatably mounted on the first slide groove 401, the sliding end of the cross arm 5 extending into the first slide groove 401 is provided with a threaded through hole that is threadedly connected to the lead screw 81, and a second motor 82 that drives the lead screw 81 to rotate is fixedly mounted on one end of the suspension arm 4.

[0045] The driving component 39 includes a lead screw 291 rotatably mounted on the second slide groove 501, and the end of the suspension bracket 6 extending into the second slide groove 501 is provided with a threaded through hole that is threadedly connected to the lead screw 291. The cross arm 5 is equipped with a motor 392 that drives the lead screw 291 to rotate.

[0046] When the drive unit is in use, the transmission gear 73 is driven to rotate by the first motor 72. The transmission gear 73 meshes with the fixed gear 71, thereby driving the suspension arm 4 to rotate around the hollow tube 1. Then, the second motor 82 is controlled to drive the lead screw 81 to rotate, thereby driving the cross arm 5 to slide along the first slide groove 401. Then, the third motor 92 is controlled to drive the lead screw 91 to rotate, thereby driving the suspension frame 6 to slide along the second slide groove 501, thereby realizing the movement of the optical path for laser shock strengthening. The movement of the optical path realizes the movement of the laser shock point. By combining these three degrees of freedom, the workpiece can be subjected to efficient shock strengthening operations, which can improve the overall efficiency of the shock strengthening operation.

[0047] Furthermore, in order to improve the moving stability of the cross brace 5, a diagonal brace 52 is installed on the cross brace 5. One end of the diagonal brace 52 is fixedly connected to the sliding end of the cross brace 5 that extends into the first sliding groove 401, and the other end of the diagonal brace 52 is fixedly connected to the end of the cross brace 5 that is away from the suspension arm 4.

[0048] Two side plates 42 are symmetrically installed on the side of the cantilever arm 4 facing the cross arm 5. A support rod 43 is fixedly installed between the two side plates 42. The inclined plate 52 has a rod hole through which the support rod 43 passes. In this way, while the cross arm 5 slides along the first sliding groove 401, the inclined plate 52 increases the cross bracing strength of the entire cross arm 5. With the support of the support rod 43, the sliding stability of the entire cross arm 5 is improved, thereby improving the stability of the optical path movement.

[0049] Working principle of a mobile optical path type laser shock enhancement device:

[0050] In use, the equipment is fixed to the laser worktable via connecting piece 3 or connected to a robotic arm. Then, the control device for controlling the laser equipment's impact operation is electrically connected to the entire equipment. After connection, the workpiece is placed at the bottom of the laser shock strengthening equipment. Then, according to the part of the workpiece that needs to be impact strengthened, drive component 1 7, drive component 2 8, and drive component 3 9 are controlled to drive. The suspension arm 4 rotates axially around the hollow tube 1, and the cross arm 5 slides along the suspension arm 4 to achieve lateral movement around the hollow tube 1. The suspension frame 6 slides along the cross arm 5 to achieve radial movement around the hollow tube 1. The laser tube 62 moves with the suspension frame 6, thereby performing moving laser shock strengthening on the workpiece. When the laser tube 62 moves, the entire laser beam path follows the rotation of the high-vibration mirror 1 41, is directed towards the high-vibration mirror 2 51, passes through the high-vibration mirror 2 51, is directed towards the high-vibration mirror 3 61, and then is directed towards the laser tube 62. After the focusing lens 63 adjusts the spot size, the laser beam is emitted from the laser tube 62 to perform laser shock strengthening on the workpiece.

[0051] Furthermore, in order to improve the stability of the optical path movement, when the drive component 7 drives the suspension arm 4 to rotate around the hollow tube 1, the L-shaped tie rod 44 slides synchronously in the groove 301 using the ball bearings 441, thereby improving the overall rotational stability of the suspension arm 4, thus improving the stability of the laser optical path movement. The ball bearings 441 are used to reduce the overall sliding friction and improve its rotational response speed. The cross bracing strength of the entire cross bracing arm 5 is improved by the inclined plate 52, and the support rod 43 is used to improve the sliding stability of the entire cross bracing arm 5, thereby improving the stability of the optical path movement.

[0052] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A mobile optical path type laser shock peening device, comprising: Hollow tube (1), and laser generator (2) installed at the top of hollow tube (1), the laser beam emitted by the laser generator (2) can be emitted along the axis of hollow tube (1), and a number of connecting pieces (3) are installed at the top of hollow tube (1). Its features are, Also includes: A suspension arm (4) is rotatably mounted on the bottom end of the hollow tube (1). A first sliding groove (401) is provided inside the suspension arm (4). A cross brace (5) is slidably mounted on the first sliding groove (401). A second sliding groove (501) is provided on the cross brace (5). A suspension frame (6) is slidably mounted on the second sliding groove (501). High-voltage mirrors one (41), two (51), and three (61) that reflect the laser emitted from the hollow tube (1) are respectively mounted on the suspension arm (4), the cross brace (5), and the suspension frame (6). The bottom end of 6) is equipped with a laser tube (62) that receives the laser reflected by the high-vibration mirror three (61). A focusing lens (63) for adjusting the size of the laser spot is slidably installed inside the laser tube (62). A drive component one (7) is installed on the hollow tube (1) to drive the suspension arm (4) to rotate around the hollow tube (1). A drive component two (8) is installed on the suspension arm (4) to drive the cross arm (5) to slide along the first slide groove (401). A drive component three (9) is installed on the cross arm (5) to drive the suspension frame (6) to slide along the second slide groove (501).

2. The mobile optical path laser shock blasting device according to claim 1, characterized in that, A connecting plate (31) is installed on each of the connecting pieces (3), and a ring (32) is installed on the connecting plate (31). The ring (32) is coaxially arranged with the hollow tube (1). An L-shaped tie rod (44) is fixedly installed on one end of the suspension arm (4) facing the ring (32). The L-shaped tie rod (44) slides with the upper surface of the ring (32).

3. The mobile optical path laser shock peening device according to claim 2, characterized in that, The bottom end of the L-shaped pull rod (44) is fitted with several balls (441), and the ring (32) has a groove (301) that rolls with the balls (441).

4. The mobile optical path laser shock peening device according to claim 1, characterized in that, The bottom ends of the suspension arm (4) and the cross arm (5) are respectively equipped with a protective cover one (45) and a protective cover two (53), and the protective cover one (45) and the protective cover two (53) are provided with through slots through which the laser light path passes.

5. The mobile optical path laser shock blasting device according to claim 1, characterized in that, The laser tube (62) has a light-emitting lens (64) located below the focusing lens (63), and the bottom end of the laser tube (62) is connected to a jet tube (65), which is connected to an inert gas through a conduit.

6. The mobile optical path laser shock blasting device according to claim 1, characterized in that, The drive unit 1 (7) includes a fixed gear (71) fixedly mounted on the suspension arm (4) and a motor 1 (72) fixedly mounted on one side of the hollow tube (1). The output shaft of the motor 1 (72) is fixedly mounted on a transmission gear (73) that meshes with the fixed gear (71).

7. The mobile optical path laser shock blasting device according to claim 1, characterized in that, The second driving component (8) includes a lead screw (81) rotatably mounted on the first slide groove (401), and the sliding end of the cross arm (5) extending into the first slide groove (401) is provided with a threaded through hole that is threadedly connected to the lead screw (81). One end of the suspension arm (4) is fixedly mounted with a second motor (82) that drives the lead screw (81) to rotate.

8. The mobile optical path laser shock blasting device according to claim 7, characterized in that, A diagonal brace (52) is installed on the cross brace (5). One end of the diagonal brace (52) is fixedly connected to the sliding end of the cross brace (5) that extends into the first sliding groove (401). The other end of the diagonal brace (52) is fixedly connected to the end of the cross brace (5) that is away from the suspension arm (4).

9. The mobile optical path laser shock blasting device according to claim 8, characterized in that, Two side plates (42) are symmetrically installed on one side of the suspension arm (4) facing the cross arm (5), and a support rod (43) is fixedly installed between the two side plates (42). The inclined plate (52) has a rod hole through which the support rod (43) passes.

10. The mobile optical path laser shock blasting device according to claim 1, characterized in that, The driving component three (9) includes a lead screw two (91) rotatably mounted on the second slide groove (501), and the end of the suspension bracket (6) extending into the second slide groove (501) is provided with a threaded through hole that is threadedly connected to the lead screw two (91). The cross arm (5) is equipped with a motor three (92) that drives the lead screw two (91) to rotate.

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