Integrated variable-focus laser cladding gun head

Abstract

The integrated variable-focus laser cladding gun head comprises a spliced gun body shell, a gun head body is installed on one side of the spliced gun body shell, and an optical module, an adjustable collimation assembly, a beam expanding assembly, a focusing assembly and a protection assembly are sequentially installed on one side of the spliced gun body shell; the adjustable collimation assembly comprises a box body installed on one side of the spliced gun body shell and a shell body installed on one side of the box body. Compared with the prior art, through the arrangement of the variable-focus assembly, the adjustable collimation assembly is integrated on the laser cladding gun head body, and the position of the collimation lens group can be adjusted under the cooperation of a plurality of parts in the adjustable collimation assembly, so that the size of a laser cladding light spot can be conveniently adjusted; and an integrated mode is adopted, so that the overall occupied area of the device is effectively reduced, and the convenience and applicability of the device are improved while the space utilization rate is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cladding processing devices, and in particular to an integrated variable-focus laser cladding gun head. Background Art

[0002] Laser cladding technology refers to a process in which selected coating materials are placed on the surface of the coated substrate in the form of different fillers. After laser irradiation, the selected coating materials and a thin layer on the substrate surface are melted simultaneously, and then quickly solidified to form a surface coating with extremely low dilution and metallurgical bonding with the substrate material, thereby significantly improving the wear resistance, corrosion resistance, heat resistance, oxidation resistance and electrical properties of the substrate material surface.

[0003] The existing laser cladding gun head still has certain shortcomings: the laser cladding gun head is inconvenient to disassemble and assemble, and when a component is damaged, the entire device needs to be replaced, the replacement and maintenance costs are high, and it is not convenient to adjust and control the size of the laser cladding spot, which is inconvenient to use. Therefore, it is necessary to design an assembled and integrated variable-focus laser cladding gun head with adjustable function. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art laser cladding gun head that is inconvenient to disassemble and assemble, and inconvenient to adjust and control the size of the laser cladding spot, one of the objectives of the present invention is to provide an integrated variable-focus laser cladding gun head.

[0005] One of the purposes of the present invention is achieved by the following technical solution: an integrated variable focus laser cladding gun head, comprising a spliced gun body shell: a gun head body is mounted on one side of the spliced gun body shell, an optical module, an adjustable collimator assembly, a beam expander assembly, a focusing assembly and a protective assembly are mounted on one side of the spliced gun body shell in sequence; the adjustable collimator assembly comprises a box mounted on one side of the spliced gun body shell, a shell mounted on one side of the box body, a slide groove provided on one side wall of the box body, a collimator lens group slidably connected to the inner wall of the slide groove, a support seat mounted on one side of the collimator lens group, a slide seat mounted on the inner wall of the support seat, a threaded sleeve fixed in the middle of the support seat, a threaded screw threadedly connected to the inner wall of the threaded sleeve, and a stepper motor arranged at one end of the threaded screw, the threaded screw being fixed at the output end of the stepper motor. The adjustable collimator assembly facilitates the adjustment of the position of the collimator lens group, thereby achieving the purpose of adjusting the size of the laser cladding spot, and the spliced gun body shell can be used to adjust the length of the gun body shell according to actual use requirements, making it easy to use.

[0006] According to the integrated variable-focus laser cladding gun head, a cover plate is screwed onto one side wall of the box, so as to close the box and protect the adjustable collimation assembly.

[0007] According to the integrated variable-focus laser cladding gun head, a fixing seat is screwed onto the inner wall of one side of the housing, the support seat is slidably connected to one side of the fixing seat, a blocking plate is screwed onto one side of the fixing seat, a through hole is formed in the middle of the blocking plate, a supporting sleeve is mounted on the inner wall of the through hole, and the threaded screw is rotatably connected to the inner wall of the supporting sleeve. This facilitates controlling the maximum travel of the sliding seat, and thus the movement range of the collimating lens assembly.

[0008] According to the integrated variable-focus laser cladding gun head, the outer wall of the spliced gun body housing is provided with mounting slots in a rectangular array. The beam expander assembly includes a mounting housing and a beam expander lens mounted in the middle of the mounting housing. The mounting housing is screwed between the focusing assembly and the housing. This facilitates installation and removal of the beam expander assembly and replacement of the beam expander lens.

[0009] According to the integrated variable-focus laser cladding gun head, the structure of the focusing assembly is the same as that of the beam expander assembly. The focusing assembly differs from the beam expander assembly in that the composition of the focusing lens is different from that of the beam expander lens. This facilitates installation and removal of the focusing assembly and improves the uniformity of the beam spot.

[0010] According to the integrated variable-focus laser cladding gun head, the protective assembly includes a first protective housing and a second protective housing, a mounting plate screwed between the first and second protective housings, and a protective lens mounted on the mounting plate. The protective assembly is provided in two sets, one mounted between the optical module and the housing, and the other between the focusing assembly and the spliced gun body housing. This facilitates installation, removal, and replacement of the protective assembly, and the protective assembly can isolate molten pool splashes and dust.

[0011] According to the integrated variable-focus laser cladding gun head, a pull block is fixedly connected to one side of the mounting plate, which facilitates the removal and installation of the two sets of protective components from the spliced gun body shell and is easy to use.

[0012] According to the integrated variable-focus laser cladding gun head, the center lines of the adjustable collimator, the beam expander, the focusing assembly, and the protective assembly are all aligned, facilitating laser cladding and ensuring quality, thereby preventing the laser beam from deviating from the laser cladding path.

[0013] According to the integrated variable-focus laser cladding gun head, a base is installed on the lower surface of the spliced gun body shell to facilitate supporting the stability of the spliced gun body shell.

[0014] The above scheme has the following beneficial effects:

[0015] 1. Through the setting of the variable focus component, compared with the existing technology, this device integrates an adjustable collimation component on the laser cladding gun head body, which can adjust the position of the collimation lens group with the cooperation of multiple components in the adjustable collimation component, so that the size of the laser cladding spot can be easily adjusted. In addition, the integrated design of this device effectively reduces the overall footprint of the device, thereby improving space utilization while enhancing the convenience and applicability of the device.

[0016] 2. Compared with the prior art, this device can adjust the overall length of the device according to actual needs by setting up a spliced gun body shell, an adjustable collimation component, a beam expansion component, a focusing component and a protection component. Compared with the integrated laser cladding gun body, the focusing component, the adjustable collimation component, the beam expansion component and the protection component are assembled with the spliced gun body shell, which is convenient for disassembly, replacement and assembly, and effectively reduces the subsequent maintenance cost.

[0017] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0019] Figure 1 This is a schematic diagram of the overall structure of an integrated variable-focus laser cladding gun head of the present invention;

[0020] Figure 2 This is a schematic diagram of the overall top view structure of an integrated variable-focus laser cladding gun head of the present invention;

[0021] Figure 3 This is an exploded view of the overall structure of an integrated variable-focus laser cladding gun head of the present invention;

[0022] Figure 4 This is a structural schematic diagram of a beam expansion component of an integrated variable-focus laser cladding gun head of the present invention;

[0023] Figure 5 This is a structural schematic diagram of an adjustable collimation component of an integrated variable-focus laser cladding gun head of the present invention;

[0024] Figure 6 This is a schematic structural diagram of a blocking plate of an integrated variable-focus laser cladding gun head according to the present invention;

[0025] Figure 7 This is a structural schematic diagram of a threaded screw of an integrated variable-focus laser cladding gun head of the present invention;

[0026] Figure 8 The figure is a schematic structural diagram of a box body of an integrated variable-focus laser cladding gun head according to the present invention.

[0027] Legend:

[0028] 1. Spliced gun body shell; 2. Gun head body; 3. Optical module; 4. Adjustable collimation assembly; 41. Box; 42. Shell; 43. Slide; 44. Collimation lens group; 45. Support seat; 46. Slide; 47. Threaded sleeve; 48. Threaded screw; 49. Stepper motor; 5. Beam expansion assembly; 51. Mounting shell; 52. Beam expansion lens; 6. Focusing assembly; 7. Protection assembly; 71. Protective shell 1; 72. Protective shell 2; 73. Mounting plate; 74. Protective lens; 8. Cover; 9. Fixed seat; 10. Blocking plate; 11. Through hole; 12. Support sleeve; 13. Mounting slot; 14. Pull block; 15. Base. DETAILED DESCRIPTION

[0029] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be understood as a limitation on the scope of protection of the present invention.

[0030] Reference Figures 1-8An integrated variable-focus laser cladding gun head includes a spliced gun body shell 1: a gun head body 2 is installed on one side of the spliced gun body shell 1, an optical module 3, an adjustable collimator assembly 4, a beam expander assembly 5, a focusing assembly 6 and a protective assembly 7 are installed on one side of the spliced gun body shell 1 in sequence, and the adjustable collimator assembly 4 includes a box body 41 installed on one side of the spliced gun body shell 1, a shell 42 installed on one side of the box body 41, a slide groove 43 opened on the side wall of one side of the box body 41, a collimator lens group 44 slidably connected to the inner wall of the slide groove 43, and a collimator lens group 44 installed on one side of the collimator lens group 44. The support seat 45, the slide seat 46 installed on the inner wall of the support seat 45, the threaded sleeve 47 fixed to the middle of the support seat 45, the threaded screw 48 threadedly connected to the inner wall of the threaded sleeve 47 and the stepping motor 49 provided at one end of the threaded screw 48, the threaded screw 48 is fixed to the output end of the stepping motor 49, the side wall of one side of the box body 41 is screwed with a cover plate 8, the inner wall of one side of the box body 41 is screwed with a fixing seat 9, the support seat 45 is slidably connected to one side of the fixing seat 9, and the fixing seat 9 is screwed with a blocking plate 10 on one side. A through hole 11 is opened in the middle of the blocking plate 10, and the through hole The inner wall of the gun body 11 is provided with a support sleeve 12, and the threaded screw 48 is rotatably connected to the inner wall of the support sleeve 12. The outer wall of the spliced gun body shell 1 is provided with a mounting groove 13 in a rectangular array. The beam expansion assembly 5 includes a mounting shell 51 and a beam expansion lens 52 mounted in the middle of the mounting shell 51. The mounting shell 51 is mounted between the focusing assembly 6 and the housing 42 by screws. The structure of the focusing assembly 6 is the same as that of the beam expansion assembly 5. The structure of the focusing assembly 6 is different from that of the beam expansion assembly 5 in that the composition of the focusing lens is different from that of the beam expansion lens 52. The protective assembly 7 includes a protective Shell 1 71 and protective shell 2 72, a mounting plate 73 screwed between protective shell 1 71 and protective shell 2 72, a protective lens 74 mounted on the mounting plate 73, there are two groups of protective components 7, the two groups of protective components 7 are respectively installed between the optical module 3 and the shell 42, and between the focusing component 6 and the spliced gun body shell 1, a pull block 14 is fixedly connected to one side of the mounting plate 73, the center lines of the adjustable collimation component 4, the beam expansion component 5, the focusing component 6 and the protective component 7 are all in a straight line, and a base 15 is installed on the lower surface of the spliced gun body shell 1.

[0031] The beam expander lens 52 of the beam expander assembly 5 is a combination of a convex lens and a concave lens, the focusing lens is a combination of multiple convex lenses, the collimating lens group 44 of the adjustable collimating assembly 4 is a convex lens, and the protective lens 74 of the protective assembly 7 is a plane mirror. The spliced gun body shell 1, the adjustable collimating assembly 4, the beam expander assembly 5, the focusing assembly 6, the protective assembly 7 and the gun head body 2 adopt an assembled and assembled structure. When one of the components is damaged, it can be easily removed and replaced. Compared with the integrated laser cladding gun head, the device adopts an assemblable structure to facilitate the replacement of damaged components, thereby reducing maintenance costs and being easy to use. The spliced gun body shell 1 can adjust the length of the gun head body 2 according to actual use requirements (processing requirements) to meet different processing requirements; the device also integrates an adjustable collimating assembly 4 to adjust the position of the collimating lens group 44 to achieve the purpose of changing the size of the laser cladding spot, thereby improving the convenience of the device.

[0032] Working principle: By screwing multiple screws into the holes in the mounting slots 13, multiple spliced gun body shells 1 are assembled with the optical module 3, the adjustable collimating assembly 4, the beam expanding assembly 5, the focusing assembly 6, the protective assembly 7 and the gun head body 2. The laser beam is emitted through the optical module 3, and the laser beam passes through the protective lens 74 to reach the collimating lens group 44 of the adjustable collimating assembly 4. The collimating lens group 44 converts the laser beam from a divergent state into a parallel beam. After passing through the collimating lens group 44, the parallel beam is transmitted to the beam expanding lens 52 of the beam expanding assembly 5. The beam expanding lens 52 It receives parallel light and amplifies the diameter of the incident laser beam in proportion, thereby reducing the power density of the laser beam and improving the quality of the laser beam. The laser beam then reaches the focusing lens of the focusing assembly 6 and is focused by multiple focusing lenses. After being focused, the laser beam passes through the protective lens 74 of the protective assembly 7 and is emitted from the gun head body 2, thereby achieving the purpose of laser cladding. The protective assembly 7 can prevent the molten pool from splashing and dust from entering the spliced gun body shell 1 and affecting the operation of its internal optical system (adjustable collimation assembly 4, focusing assembly 6, beam expansion assembly 5);

[0033] The stepper motor 49 is installed inside the box 41 to ensure the operation stability of the stepper motor 49. The stepper motor 49 is communicated with an external motor driver, and the external motor driver is communicated with an external PLC controller (Programmable Logic Controller). The operation of the stepper motor 49 is remotely controlled by the external PLC controller, and the start, precise adjustment and shutdown of the stepper motor 49 are controlled by the PLC controller. The control logic is that the PLC controller outputs pulses (frequency, number of pulses) and direction (forward / reverse) signals, and the stepper driver converts the output signal of the PLC controller into motor winding current. The stepper motor 49 rotates a fixed angle every time it receives a pulse. The rotation of the stepper motor 49 drives the threaded screw 48 to rotate, and the threaded screw 48 converts the rotational motion into linear motion, that is, the parameters are set by the external PLC controller to achieve precise movement of the collimating lens group 44. This control logic is a relatively mature motor control logic, and thus it will not be described in detail.

[0034] When it is necessary to adjust the position of the collimating lens group 44 according to actual needs to change the size of the laser cladding spot, the stepper motor 49 is driven by the external PLC controller to start and drive the threaded screw 48 to rotate on the inner wall of the support sleeve 12. The diameter of the support sleeve 12 is larger than the diameter of the threaded screw 48. The support sleeve 12 plays a role in preventing the threaded screw 48 from falling. The threaded screw 48 rotates and drives the threaded sleeve 47 to move on its outer wall. The threaded sleeve 47 moves to drive the slide 46 and the support seat 45 to move, so that the support seat 45 moves and drives the collimating lens group 44 to slide. The inner wall of the groove 43 moves, thereby adjusting the position of the collimating lens group 44. By adjusting the position of the collimating lens group 44, the size of the laser cladding spot is changed. When the collimating lens group 44 is close to one side of the laser beam (optical module 3), the spot becomes larger. When the collimating lens group 44 is away from one side of the laser beam (optical module 3), the spot becomes smaller, thereby meeting different laser cladding processing requirements, thereby effectively improving the convenience and applicability of the device. In addition, the device adopts an integrated design with a small volume, thereby reducing the overall footprint of the device and effectively improving space utilization.

[0035] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the scope of the present invention.

Claims

1. An integrated variable focus laser cladding gun head, characterized in that: It comprises a spliced gun body shell (1): a gun head body (2) is installed on one side of the spliced gun body shell (1), and an optical module (3), an adjustable collimating component (4), a beam expanding component (5), a focusing component (6) and a protective component (7) are installed in sequence on one side of the spliced gun body shell (1); The adjustable collimation assembly (4) includes a box (41) installed on one side of the spliced gun body shell (1), a shell (42) installed on one side of the box (41), a slide groove (43) opened on the side wall of one side of the box (41), a collimating lens group (44) slidably connected to the inner wall of the slide groove (43), a support seat (45) installed on one side of the collimating lens group (44), a slide seat (46) installed on the inner wall of the support seat (45), a threaded sleeve (47) fixed in the middle of the support seat (45), a threaded screw (48) threadedly connected to the inner wall of the threaded sleeve (47), and a stepping motor (49) arranged at one end of the threaded screw (48), wherein the threaded screw (48) is fixed at the output end of the stepping motor (49).

2. The integrated variable focus laser cladding gun head according to claim 1, characterized in that: A cover plate (8) is screwed onto one side wall of the box body (41).

3. The integrated variable focus laser cladding gun head according to claim 2, characterized in that: A fixing seat (9) is screwed onto the inner wall of one side of the box body (41), the support seat (45) is slidably connected to one side of the fixing seat (9), a blocking plate (10) is screwed onto one side of the fixing seat (9), a through hole (11) is provided in the middle of the blocking plate (10), a supporting sleeve (12) is installed on the inner wall of the through hole (11), and the threaded screw (48) is rotatably connected to the inner wall of the supporting sleeve (12).

4. The integrated variable focus laser cladding gun head according to claim 1, characterized in that: The outer wall of the spliced gun body shell (1) is provided with mounting grooves (13) in a rectangular array. The beam expansion assembly (5) comprises a mounting shell (51) and a beam expansion lens (52) mounted in the middle of the mounting shell (51). The mounting shell (51) is mounted between the focusing assembly (6) and the housing (42) by screws.

5. The integrated variable focus laser cladding gun head according to claim 4, characterized in that: The structure of the focusing assembly (6) is the same as that of the beam expanding assembly (5), and the structure of the focusing assembly (6) is different from that of the beam expanding assembly (5) in that the composition of the focusing lens is different from that of the beam expanding lens (52).

6. The integrated variable focus laser cladding gun head according to claim 1, characterized in that: The protective assembly (7) includes a protective shell 1 (71) and a protective shell 2 (72), a mounting plate (73) screwed between the protective shell 1 (71) and the protective shell 2 (72), and a protective lens (74) mounted on the mounting plate (73). The number of the protective assembly (7) is two groups, and the two groups of the protective assembly (7) are respectively mounted between the optical module (3) and the shell (42), and between the focusing assembly (6) and the spliced gun body shell (1).

7. The integrated variable focus laser cladding gun head according to claim 6, characterized in that: A pull block (14) is fixedly connected to one side of the mounting plate (73).

8. The integrated variable focus laser cladding gun head according to claim 1, characterized in that: The center lines of the adjustable collimating component (4), the beam expanding component (5), the focusing component (6), and the protective component (7) are all on a straight line.

9. The integrated variable focus laser cladding gun head according to claim 1, characterized in that: A base (15) is mounted on the lower surface of the spliced gun body shell (1).

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