A hand-held laser welding gun

Abstract

The application discloses a handheld laser welding gun and relates to the field of laser welding equipment, which comprises a hollow laser cylinder, a positioning assembly, a cable mounting head and a focusing assembly. The positioning assembly comprises a fixing ring and positioning claws. The fixing ring is rotationally arranged at one end of the laser cylinder. The two positioning claws are symmetrically arranged on the outer end face of the fixing ring. The cable connecting part is arranged at the end of the laser cylinder away from the positioning claws and is used for mounting a cable for generating a laser source. The focusing assembly comprises a cylindrical fixing frame and a converging lens. The cylindrical fixing frame is movably embedded in the laser cylinder, and the focusing lens is coaxially arranged in the cylindrical fixing frame. The laser cylinder is further provided with a focusing mechanism for adjusting the position of the focusing lens in the laser cylinder. A protective lens is coaxially embedded at the end of the laser cylinder close to the positioning claws. A handle is arranged on the outer sidewall of the bottom of the laser cylinder. The handheld laser welding gun has the advantages of quick focusing, accurate positioning and flexible operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of laser welding equipment, in particular to a laser welding gun. BACKGROUND

[0002] Laser welding is a kind of invented welding method, which can reduce the heat input to the minimum required amount, the heat affected zone has a small range of metallographic changes, and the deformation caused by heat conduction is also the lowest. There is no electrode pollution or damage concern, and because it is not a contact welding process, the tool wear and deformation can be minimized. The laser beam is easy to focus, align and guided by optical instruments, which can be placed at a suitable distance from the workpiece, and can be guided between the tools or obstacles around the workpiece. Other welding methods cannot be used due to the above-mentioned space limitations. The laser beam can be focused on a very small area, and small and closely spaced components can be welded. A wide range of materials can be welded, and various heterogeneous materials can be joined together. It is not affected by the magnetic field, can accurately align the welding parts, and when welding thin materials or thin wires, it will not have the problem of easy remelting like arc welding.

[0003] Laser welding can achieve spot welding, butt welding, overlay welding, sealing welding, etc. It has high depth-width ratio, small weld width, small heat affected zone, small deformation, fast welding speed, flat and beautiful weld, no need for post-welding treatment or only simple treatment, high weld quality, no pores, precise control, small focused light spot, high positioning accuracy, and easy automation. However, the existing laser welding equipment structure generally adopts an integrated laser welding gun, which has the defects of complex structure, inconvenient operation, and inability to adjust the focal length. At the same time, the existing laser welding gun cannot accurately position the welding of the male and female angle positions of the welding parts, causing welding difficulties. SUMMARY

[0004] The purpose of the present application is to solve the problems of inconvenient positioning and difficult focusing during the welding process of the existing laser welding equipment, and to provide a handheld laser welding gun with the advantages of quick focusing, accurate positioning, and flexible operation.

[0005] In order to achieve the above object, the technical scheme adopted by the present application is: a handheld laser welding gun, comprising a hollow laser barrel, a positioning assembly, a fiber cable mounting joint and a focusing assembly, the positioning assembly comprises a fixing ring and a positioning claw, the fixing ring is rotationally arranged at one end of the laser barrel, the positioning claw is symmetrically arranged on the outer end face of the fixing ring, the fiber cable mounting joint is arranged at one end of the laser barrel away from the positioning claw for mounting a fiber cable generating a laser source, the focusing assembly comprises a cylindrical fixing frame and a focusing lens, the cylindrical fixing frame is movably embedded in the laser barrel, the focusing lens is coaxially arranged in the cylindrical fixing frame, the laser barrel is further provided with a focusing mechanism for adjusting the position of the focusing lens in the laser barrel, a protective lens is coaxially embedded in the laser barrel close to the positioning claw, and a handle is arranged on the outer sidewall of the bottom of the laser barrel.

[0006] In order to further optimize the present application, the following technical schemes can be preferred:

[0007] Preferably, a conical mounting head is rotationally arranged at one end of the laser barrel corresponding to the mounting of the positioning claw.

[0008] Preferably, a fixing sleeve is arranged in the fixing ring, an annular clamping groove is formed on the outer end face of the fixing ring, a clamping part one matched with the annular clamping groove is arranged on the outer end of the fixing sleeve close to the outside, and the fixing sleeve extends to the inside of the laser barrel close to the inner end and is fixed with the laser barrel.

[0009] Preferably, a pin shaft is symmetrically arranged on the outer sidewall of the fixing sleeve close to the inside, and a mounting hole for clamping the pin shaft is arranged on the inner sidewall of the laser barrel corresponding to the position of the pin shaft.

[0010] Preferably, a magnetic arc-shaped limiting through groove is symmetrically formed on the fixing ring in the axial direction, the arc-shaped limiting through groove takes the axis of the fixing ring as the center, a magnetic limiting column is arranged on the end face of the laser barrel corresponding to the position of the arc-shaped limiting through groove, the limiting column comprises a positioning part on the outside and a sliding part on the inside, the diameter of the positioning part is larger than that of the sliding part, the arc-shaped limiting through groove is matched with the outer diameter of the positioning part, a U-shaped protrusion matched with the outer diameter of the sliding part is arranged on the inner wall of the arc-shaped limiting through groove corresponding to the position of the sliding part, and the limiting column is slidingly installed in the arc-shaped limiting through groove.

[0011] Preferably, a spherical protrusion is arranged at the end position of the positioning claw.

[0012] Preferably, a spherical shell-shaped containing groove is arranged at the end position of the positioning claw, and a ball is movably arranged in the containing groove.

[0013] Preferably, the focusing mechanism comprises a rack plate, a sliding groove is formed on the outer side wall of the cylindrical fixing frame in the axial direction, the rack plate is arranged on the side wall of the sliding groove, a rotating shaft is arranged on the laser cylinder in the radial direction corresponding to the position of the sliding groove, a driving gear is arranged at one end of the rotating shaft extending into the sliding groove, the driving gear is in meshing transmission with the rack plate, and an adjusting rotating wheel is arranged at the other end of the rotating shaft extending out of the laser cylinder, the adjusting rotating wheel rotates to drive the focusing lens to move in the axial direction of the laser cylinder.

[0014] Preferably, at least two sliding guide rails are uniformly arranged on the inner side wall of the laser cylinder in the axial direction, and a sliding groove matched with the sliding guide rails is arranged on the cylindrical fixing frame corresponding to the sliding guide rails.

[0015] Preferably, the arc-shaped parts protruding outward are symmetrically arranged on both sides of the bottom of the sliding guide rail.

[0016] The present application has the following beneficial effects:

[0017] 1. The two movable positioning claws arranged on the laser cylinder can be used for positioning the male and female corner positions of the welding object during the use of the equipment, so that accurate welding can be achieved; the positioning claws are rotatably arranged on the laser cylinder through the fixing ring, which can be adjusted adaptively for different welding positions, and the operator can operate flexibly, so that the safety and convenience of the equipment operator during use are ensured, and the operator can quickly replace the positioning assembly; the ball-shaped protrusions or the form of the ball bearings arranged at the end of the positioning claw can reduce the friction, so that the surface of the welding object is not damaged.

[0018] 2. The focusing structure is arranged on the laser cylinder, and the focusing structure is arranged on the laser cylinder. Since different welding materials and different welding thicknesses are required, the laser welding focal point needs to be adjusted before welding to meet the welding requirements. Compared with the existing integrated laser welding machine, the position of the focusing lens can be adjusted by directly rotating the adjusting rotating wheel in the focusing structure, so that the operator can quickly focus during welding, so as to meet the requirements of the laser welding of the welding seam with undulating and different widths, and the present application has important market value and practical significance. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a front view of the handheld laser welding gun.

[0020] Figure 2 It is a top view of the handheld laser welding gun.

[0021] Figure 3 It is a left view of the handheld laser welding gun.

[0022] Figure 4Figure 1 is a right view of the handheld laser welding gun in Example 1;

[0023] Figure 5 Figure 2 is a side view of the positioning assembly in Example 1;

[0024] Figure 6 Figure 3 is a schematic view of another structure of the end of the positioning claw at A;

[0025] Figure 7 Figure 4 is a schematic view of the structure at B in enlarged scale

[0026] Figure 8 Figure 5 is a schematic view of the structure at C in enlarged scale;

[0027] Figure 9 Figure 6 is a schematic view of the handheld laser welding gun in use when welding a female corner;

[0028] Figure 10 Figure 7 is a schematic view of the handheld laser welding gun in use when welding a male corner;

[0029] Figure 11 Figure 8 is a right view of the handheld laser welding gun in Example 2;

[0030] Figure 12 Figure 9 is a schematic view of the internal structure of the positioning assembly in Example 2.

[0031] Wherein, 1-laser barrel, 2-optical cable connecting part, 3-tapered mounting head, 4-fixing ring, 5-positioning claw, 6-spherical protrusion, 7-adjusting rotating wheel, 8-focusing lens, 9-barrel-shaped fixing frame, 10-sliding groove, 11-sliding guide rail, 12-sliding slot, 13-arc-shaped part, 14-engaging slot, 15-fixing sleeve, 16-engaging part I, 17-engaging part II, 18-pivot, 19-mounting hole, 20-limiting column, 21-limiting slot, 22-protective mirror, 23-handle, 24-spherical shell-shaped accommodating groove, 25-U-shaped protrusion, 27-rolling ball, 201-positioning part, 202-sliding part, 701-adjusting rotating wheel, 702-rotating shaft, 703-driving gear, 704-rack plate. DETAILED DESCRIPTION

[0032] In the description of the present application, it is also necessary to point out that, unless otherwise explicitly specified and limited, the terms "arrange", "mount", "connect", "join" should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1

[0035] like Figures 1-10 As shown, a handheld laser welding gun includes a hollow laser tube 1, a positioning component, an optical cable mounting head 2, and a focusing component. The positioning component includes a fixing ring 4 and a positioning claw 5. The fixing ring is rotatably mounted on the end of the laser tube. A magnetic arc-shaped limiting groove 25 is symmetrically formed along the axial direction on the fixing ring. The arc-shaped limiting groove 25 is centered on the axis of the fixing ring. Magnetic limiting posts are installed on the end face of the laser tube corresponding to the positions of the arc-shaped limiting grooves. The fixing ring is fixed by the cooperation of the magnetic limiting posts and the arc-shaped limiting grooves 25, ensuring that... The positional stability of the fixed ring during the use of the laser welding gun; the limiting post 20 includes a positioning part 201 on the outer side and a sliding part 202 on the inner side. The diameter of the positioning part is larger than the diameter of the sliding part. The arc-shaped limiting groove matches the outer diameter of the positioning part. The inner wall of the arc-shaped limiting groove is equipped with a U-shaped protrusion 25 that matches the outer diameter of the sliding part at the position of the sliding part. The limiting post is slidably installed in the arc-shaped limiting groove 21. The rotation angle of the fixed ring is limited by the cooperation of the limiting post 20 and the limiting groove 21, thereby improving the flexibility and safety of the device.

[0036] Two positioning claws 5 are symmetrically mounted on the outer end face of the fixing ring. The positioning claws can be parallel straight rods or installed close to the axis of the laser cylinder to ensure positioning of the workpiece to be welded. To ensure optimal positioning, in this embodiment, inwardly snapping bent rods are used. This ensures precise positioning during the welding process by reducing the distance between the ends of the positioning claws without affecting laser emission. A conical mounting head 3 is screwed onto one end of the laser cylinder corresponding to the mounting claw. The conical mounting head 3 facilitates alignment by the operator during operation. A spherical protrusion 6 is installed at the end of the positioning claw 5 to prevent damage to the workpiece to be welded, enabling precise, point-to-point welding. Furthermore, such as... Figure 6As shown, the positioning claw end is provided with a spherical shell accommodating groove 24, and a ball 27 is installed in the spherical shell accommodating groove 24, which replaces the spherical protrusion 6, and can prevent the positioning claw from damaging the welding object, and can achieve the functions of positioning and precise welding; on the other hand, the ball can roll with the welding product during the welding process to reduce the friction and provide convenience for the operator. A protective mirror 22 is coaxially embedded in the laser barrel near the end of the positioning claw, which prevents dust from entering the inside; a handle 23 is installed on the outer wall of the bottom of the laser barrel, and the operator can operate by holding the handle, which improves the comfort of the operator.

[0037] The optical cable mounting head 2 is installed at the end of the laser barrel away from the positioning claw for connecting the optical cable line for generating the laser source, and the optical cable line provides the laser source of the laser welding gun; the focusing assembly includes a cylindrical fixed frame 9 and a converging lens 8, the cylindrical fixed frame is movably embedded in the laser barrel, and the converging lens 8 is coaxially installed in the cylindrical fixed frame 9; the laser barrel is also provided with a focusing mechanism for adjusting the position of the converging lens in the laser barrel, the focusing mechanism includes a rack plate, a sliding groove 10 is formed on the outer wall of the cylindrical fixed frame in the axial direction, the rack plate is installed on the side wall of the sliding groove 10, a rotating shaft 702 is installed on the laser barrel in the radial direction corresponding to the position of the sliding groove, one end of the rotating shaft 702 extends into the sliding groove and is provided with a driving gear 703, the driving gear is engaged with the rack plate for transmission, the other end of the rotating shaft 702 extends out of the laser barrel and is provided with an adjusting knob 701, the driving gear 703 is driven to rotate by the rotation of the adjusting knob, the driving gear is engaged with the rack plate 704 for transmission, and then the converging lens is driven to move along the axial direction of the laser barrel; in order to ensure the stability during the laser welding process, a positioning nut for fixing the position of the adjusting knob is installed on the outer wall of the laser barrel; four sliding rails are uniformly installed on the inner wall of the laser barrel in the axial direction, and a sliding groove 12 matched with the sliding rail 11 is installed on the cylindrical fixed frame corresponding to the sliding rail 11, arc-shaped parts 13 protruding outward are symmetrically installed on both sides of the bottom of the sliding rail, the sliding stability of the focusing assembly in the laser barrel is ensured by the sliding rail with the arc-shaped part matched with the sliding groove, and the phenomenon of rotation deviation of the focusing assembly is prevented; the laser welding gun directly rotates the adjusting knob to adjust the position of the converging lens through the focusing structure, which is convenient for personnel to quickly focus and operate, and can meet the focusing requirements of the welding seam with undulating and variable width, which has important market value and practical significance.

[0038] The working process of the embodiment is as follows: because it is difficult to position the welding position of the female and male corners during welding, the positioning claw in the embodiment can quickly position and guide the welding position, when welding the male corner position of the product; the end of the positioning claw in the positioning assembly is clamped on the welding pieces on both sides of the weld, the laser welding gun is aimed at the welding position by holding the handle, the focal length is adjusted according to the requirements of the welding conditions by adjusting the adjusting knob on the laser cylinder, and the spherical protrusions or balls on the positioning claw are slid on the surface of the welding piece during welding, so that the male corner position of the product can be accurately positioned; when the male corner position of the product is welded; the laser welding machine with one positioning claw can be replaced, the end of the positioning claw in the positioning assembly is supported at the welding position, the laser welding gun is aimed at the welding position by holding the handle, the focal length is adjusted according to the requirements of the welding conditions by adjusting the adjusting knob on the laser cylinder, and the spherical protrusions or balls on the positioning claw are slid on the welding position of the welding piece during welding, so that the female corner position of the product can be accurately positioned, and the positioning assembly can be freely rotated by a certain angle, so that the product can be continuously and accurately welded during welding, and the welding efficiency is improved.

[0039] Embodiment 2

[0040] As shown in Figures 1-3 , Figures 9-12 The difference between the embodiment 2 and the embodiment 1 is that the fixing mode of the positioning assembly on the laser cylinder is different, and the different mounting modes will be described below; the fixing sleeve 15 is mounted in the fixing ring 4, the annular clamping groove 14 is formed on the outer end face of the fixing ring, the clamping part one 16 matched with the annular clamping groove 14 is mounted on the one end of the fixing sleeve close to the outer side, the pin shafts are symmetrically mounted on the outer side wall close to the inner side of the fixing sleeve, and the mounting holes 19 for clamping the pin shafts 18 are mounted on the inner side wall of the laser cylinder corresponding to the positions of the pin shafts; the one end of the fixing sleeve close to the inner side is the clamping part two 17, the clamping part two extends into the laser cylinder and is fixed with the laser cylinder through the pin shaft 18, on the one hand, the fixing ring can be rotatably fixed on the laser cylinder to ensure the stability during use, and on the other hand, the fixing ring can be freely rotated without limitation, and the fixing ring can be freely adjusted in position along with the product during the working process of the equipment.

[0041] Finally, it should be noted that: the above only describes the preferred embodiments of the present application and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement for some technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A handheld laser welding gun, characterized in that: The laser assembly includes a hollow laser cylinder, a positioning component, an optical cable mounting connector, and a focusing component. The positioning component includes a fixing ring and positioning claws. The fixing ring is rotatably positioned at the end of the laser cylinder. Two positioning claws are symmetrically arranged on the outer end face of the fixing ring. The optical cable mounting connector is located at the end of the laser cylinder opposite to the positioning claws and is used to install the optical cable that generates the laser source. The focusing component includes a cylindrical fixing frame and a focusing lens. The cylindrical fixing frame is movably embedded within the laser cylinder, and the focusing lens is coaxially disposed within the cylindrical fixing frame. The laser cylinder also has a focusing mechanism for adjusting the position of the focusing lens within the laser cylinder. A protective lens is coaxially embedded at the end of the laser cylinder near the positioning claws. A handle is provided on the bottom outer wall of the laser cylinder. The positioning claws employ inwardly snapping bent rods, which ensure precise positioning during the welding process by reducing the distance between the ends of the positioning claws without affecting laser emission. The fixed ring is symmetrically provided with magnetic arc-shaped limiting grooves along its axial direction. The arc-shaped limiting grooves are centered on the axis of the fixed ring. A magnetic limiting post is provided on the end face of the laser cylinder corresponding to the position of the arc-shaped limiting groove. The limiting post includes a positioning part on the outer side and a sliding part on the inner side. The diameter of the positioning part is larger than the diameter of the sliding part. The arc-shaped limiting groove mates with the outer diameter of the positioning part. A U-shaped protrusion is provided on the inner wall of the arc-shaped limiting groove corresponding to the position of the sliding part, and mates with the outer diameter of the sliding part. The limiting post is slidably installed within the arc-shaped limiting groove. The focusing mechanism includes a rack plate, and the cylindrical fixing frame... A sliding groove is provided along the axial direction on the outer wall. The rack plate is set on one side wall of the sliding groove. A rotating shaft is arranged radially on the laser cylinder corresponding to the position of the sliding groove. One end of the rotating shaft extends into the sliding groove and is provided with a drive gear. The drive gear meshes with the rack plate for transmission. The other end of the rotating shaft extends out of the laser cylinder and is provided with an adjusting wheel. The rotation of the adjusting wheel drives the focusing lens to move along the axial direction of the laser cylinder. When welding the product at the yang corner position, the ends of the positioning claws in the positioning assembly are respectively clamped on the welded parts on both sides of the weld. During the welding process, the spherical protrusions or balls on the positioning claws slide against the surface of the welded parts. When welding the inside corner of a product, replace the laser welding gun with one positioning claw. By holding the end of the positioning claw in the positioning component against the weld position, the ball-shaped protrusion or ball on the positioning claw slides against the weld position of the welded part during the welding process. This ensures accurate positioning at the inside corner of the product. At the same time, the positioning component can rotate freely at a certain angle, thus enabling continuous and accurate welding during the welding process and improving welding efficiency.

2. The handheld laser welding gun according to claim 1, characterized in that: A conical mounting head is screwed onto one end of the laser cylinder corresponding to the mounting positioning claw.

3. The handheld laser welding gun according to claim 1, characterized in that: At least two sliding guide rails are evenly distributed along the axial direction on the inner side wall of the laser cylinder, and the cylindrical fixing frame is provided with a sliding groove that cooperates with the sliding guide rail.

4. A handheld laser welding gun according to claim 3, characterized in that: The bottom of the sliding guide rail has symmetrically arranged outwardly protruding arc-shaped parts on both sides.

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