Welding nozzle clamping structure and integrally-formed laser welding gun

Abstract

The utility model provides a welding nozzle clamping structure and an integrally-formed laser welding torsion.The welding nozzle clamping structure comprises a clamping head which is of a tubular structure, a plurality of notches are formed in the clamping head in a circumferential array and staggered mode, the two ends of the outer wall of the clamping head are conical faces, the outer portion of the clamping head is sleeved with an inner sleeve, the outer portion of the inner sleeve is sleeved with an outer sleeve, and the inner sleeve and the outer sleeve are connected in a sleeved mode. A connecting pipe is movably and coaxially installed in the chuck, and the front end of the connecting pipe coaxially communicates with a welding nozzle. According to the scheme, the welding nozzle clamping mechanism can achieve and maintain centering and fixing of the welding nozzle, safety and stability are improved to a certain degree, telescopic control over the welding nozzle can be achieved through movement of the connecting pipe in the chuck, the welding nozzle clamping mechanism can adapt to different working scenes conveniently, and practicability is high. According to the integrally-formed laser welding gun, the impact resistance, the safety, the stability and the like of the integrally-formed laser welding gun are improved to a certain extent through casting forming and detachable mounting of the collimating lens mounting part, the focusing lens mounting part and the protective lens mounting part, and later maintenance is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of laser welding, and particularly to a nozzle clamping structure and an integrally formed laser welding gun. Background Art

[0002] A laser welding gun is an optical system composed of a collimating lens, a reflecting lens, a focusing lens and a protective lens, and can focus the laser at a focal point. Through a controllable motion mechanism, some optical devices are driven to move periodically, so that the high-energy density laser quickly scans the area to be welded, and it is melted and crystallized to achieve the purpose of welding.

[0003] Most of the existing clamping structures for the nozzles of laser welding guns use pipe threads or nuts to fix the connecting pipe and the nozzle clamped by the chuck. Usually, the chuck adopts a structure that tightens and clamps towards the center at one end and has a clearance fit at the other end. When using a longer focal length for operation, the connecting pipe and the nozzle are loose or slip out, the safety is poor, the light spot deviates from the axis of the nozzle, and the nozzle cannot be adjusted and fixed in the axial direction, so it cannot adapt to different working scenarios and has great limitations. Therefore, it is necessary to make improvements. Utility Model Content

[0004] In order to solve the above deficiencies of the prior art, the present application provides a nozzle clamping structure and an integrally formed laser welding gun, which have certain improvements in safety and stability and are convenient for later maintenance.

[0005] In order to achieve the above object, the present utility model adopts the following technologies:

[0006] A nozzle clamping structure includes a chuck, which is a tubular structure. A plurality of notches are arranged in a circumferential array and staggered on the chuck. The two ends of the outer wall of the chuck are conical surfaces. An inner sleeve is sleeved outside the chuck, and an outer sleeve is sleeved outside the inner sleeve. A connecting pipe is movably installed inside the chuck coaxially, and a nozzle is coaxially communicated with the front end of the connecting pipe.

[0007] Further, a first flange is provided on the inner wall of the rear end of the inner sleeve, and the first flange cooperates with the conical surface at the rear side of the chuck.

[0008] Further, a second flange is provided on the inner wall of the front end of the outer sleeve, and the second flange cooperates with the conical surface at the front side of the chuck.

[0009] Further, a scale is marked on the outer wall of the connecting pipe.

[0010] Further, the inner sleeve is a chuck screw sleeve, the outer sleeve is a nut, and the inner sleeve and the outer sleeve are in threaded cooperation.

[0011] An integrally formed laser welding torch, comprising a nozzle clamping structure, a gun body and a gun body housing. The gun body is formed by casting, and an inner sleeve is embedded at the front end of the gun body. The gun body includes a connector, a collimator mounting portion, a motor mounting portion, a reflector, a focusing lens mounting portion, a protective lens mounting portion and a connecting seat. The connecting seat is arranged at the front end of the gun body, and a wire feeding bracket is arranged at the lower end of the connecting seat. The collimator mounting portion, the focusing lens mounting portion and the protective lens mounting portion are all detachably mounted. The collimator mounting portion is used for mounting a collimator, a galvanometer motor is installed in the motor mounting portion, and the main shaft of the galvanometer motor is connected to the reflector through a bracket. The focusing lens mounting portion is used for mounting a focusing lens, and the protective lens mounting portion is used for mounting a protective lens; the connector is coaxially arranged with the collimator mounting portion, the focusing lens mounting portion is coaxially arranged with the protective lens mounting portion, the intersection of the axis of the collimator mounting portion and the axis of the focusing lens mounting portion is located on the reflecting surface of the reflector, and the reflector is arranged perpendicular to the angular bisector of the axis of the collimator mounting portion and the axis of the focusing lens mounting portion.

[0012] The beneficial effects of the present utility model are as follows: The present application provides a nozzle clamping structure and an integrally formed laser welding torch. The nozzle clamping mechanism can achieve and maintain the centering and fixing of the nozzle, improving the safety and stability to a certain extent. Moreover, the telescopic control of the nozzle can be realized by the movement of the connecting pipe in the chuck, facilitating the adaptation to different working scenarios and having strong practicability. The integrally formed laser welding torch is formed by casting, and the detachable installation of the collimator mounting portion and the protective lens mounting portion improves its impact resistance, safety and stability to a certain extent, facilitating later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are only for illustrating the selected embodiments, not all possible implementation schemes, and are not intended to limit the scope of the present utility model.

[0014] Figure 1 It is a three-dimensional view of the nozzle clamping structure of the embodiment of the present application.

[0015] Figure 2 It is a cross-sectional view of the nozzle clamping structure of the embodiment of the present application.

[0016] Figure 3 It is a schematic diagram of the chuck structure of the embodiment of the present application.

[0017] Figure 4 It is a schematic diagram of the connecting pipe structure of the embodiment of the present application.

[0018] Figure 5 It is a three-dimensional view of the overall structure of the integrally formed laser welding torch of the embodiment of the present application.

[0019] Figure 6 It is a schematic diagram of the internal structure of the integrally formed laser welding torch of the embodiment of the present application.

[0020] Figure 7 It is a schematic diagram of the installation position of the integrally formed laser welding torch mirror according to an embodiment of the present application. Specific embodiments

[0021] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the following will describe the embodiments of the present utility model in detail with reference to the accompanying drawings. However, the embodiments described herein are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0022] Embodiment 1

[0023] An embodiment of the present application provides a nozzle clamping structure, as Figures 1-4 shown, including a chuck 1, which is a tubular structure. A plurality of notches are arranged in a circumferential array and staggered on the chuck 1. The two ends of the outer wall of the chuck 1 are conical surfaces. An inner sleeve 2 is sleeved outside the chuck 1, and an outer sleeve 3 is sleeved outside the inner sleeve 2. A connecting pipe 4 is movably and coaxially installed inside the chuck 1, and a nozzle 5 is coaxially connected to the front end of the connecting pipe 4.

[0024] The fixing of the connecting pipe 4 can be realized through the chuck 1, the inner sleeve 2 and the outer sleeve 3, so that the connecting pipe 4 is coaxial with the chuck 1, and then the centering and fixing of the nozzle 5 are realized. During use, the movement of the nozzle 5 can be controlled by the movement of the connecting pipe 4 along its own axis direction, so as to realize the position adjustment at the outlet of the nozzle 5 and adapt to different welding scenarios.

[0025] Specifically, a first flange 21 is provided on the inner wall at the rear end of the inner sleeve 2, and the first flange 21 cooperates with the conical surface at the rear side of the chuck 1.

[0026] Specifically, a second flange 31 is provided on the inner wall at the front end of the outer sleeve 3, and the second flange 31 cooperates with the conical surface at the front side of the chuck 1.

[0027] Under the combined action of the cooperation between the conical surface at the rear side of the chuck 1 and the first flange 21, and the cooperation between the conical surface at the front side of the chuck 1 and the second flange 31, the first flange 21 and the second flange 31 push the two ends of the chuck 1 to shrink towards the center, enhancing the tightening force of the inner sleeve 2 and the outer sleeve 3 on the chuck 1, and further realizing the centering and fixing of the connecting pipe 1 and the nozzle 5; avoiding the situation that the connecting pipe 4 and the nozzle 5 slip out of the chuck 1 during use, or the clamping force of the chuck 1 on the connecting pipe 4 and the nozzle 5 is insufficient, resulting in misalignment and shaking, effectively improving the safety and stability of the nozzle clamping structure.

[0028] Specifically, a scale is marked on the outer wall of the connecting pipe 4. When it is necessary to change the position of the nozzle 5 according to different welding scenarios, the movement of the connecting pipe 4 in the chuck 1 can be adjusted more precisely with the assistance of the scale marked on the outer wall of the connecting pipe 4.

[0029] Specifically, the inner sleeve 2 is a chuck screw sleeve, and the outer sleeve 3 is a nut. The inner sleeve 2 and the outer sleeve 3 are in threaded cooperation.

[0030] Embodiment 2

[0031] An embodiment of the present application provides an integrally formed laser welding torch 6, as Figures 5-7 shown, which includes a nozzle clamping structure, a gun body 6, and a gun body housing that cooperates with the gun body 6. The gun body 6 is formed by casting. The integrally formed gun body 6 by casting has stronger impact resistance, lighter weight, lower processing cost, and improved safety and stability. The inner sleeve 2 is embedded at the front end of the gun body 6.

[0032] Specifically, the gun body 6 includes a joint 61, a collimator mirror mounting portion 62, a motor mounting portion 63, a reflector mirror 64, a focusing mirror mounting portion 65, a protective mirror mounting portion 66, and a connecting seat 67. The connecting seat 67 is provided at the front end of the gun body 6. A wire feeding bracket 671 is provided at the lower end of the connecting seat 67. The wire feeding bracket 671 is used for delivering the welding wire. The collimator mirror mounting portion 62, the focusing mirror mounting portion 65, and the protective mirror mounting portion 66 are all detachably mounted, which is convenient for replacing the lenses later and is beneficial to the maintenance of the welding torch. The collimator mirror mounting portion 62 is used for mounting the collimator mirror. A galvanometer motor 631 is installed in the motor mounting portion 63. The main shaft of the galvanometer motor 631 is connected to the reflector mirror 64 through a bracket 632. The focusing mirror mounting portion 65 is used for mounting the focusing mirror, and the protective mirror mounting portion 66 is used for mounting the protective mirror.

[0033] The joint 61 and the collimator mirror mounting portion 62 are coaxially arranged. The focusing mirror mounting portion 65 and the protective mirror mounting portion 66 are coaxially arranged. The intersection of the axis of the collimator mirror mounting portion 62 and the axis of the focusing mirror mounting portion 65 is located on the reflection surface of the reflector mirror 64, and the reflector mirror 64 is perpendicular to the angular bisector of the axis of the collimator mirror mounting portion 62 and the axis of the focusing mirror mounting portion 65. To ensure that when the reflector mirror 64 is stationary, the laser output from the welding torch at the nozzle 5 is located on the axis of the nozzle 5, so that when the staff uses the welding torch, it conforms to the habit of conventional centering operation. At the same time, it is ensured that the parallel light beam output from the collimator mirror can be completely received by the focusing mirror and the protective mirror after being reflected by the reflector mirror 64, and is focused into a point at the focal length of the nozzle 5 under the action of the focusing mirror and the protective mirror, avoiding the problem of damage to the gun body 6 caused by laser deviation and improving the safety and stability of the welding torch.

[0034] During application, the fiber head of the laser is coaxially connected to the optical path through the connector 61. The laser emitted from the laser passes through the collimating mirror perpendicular to the axis of the optical path. The parallel beam emitted after being collimated by the collimating mirror irradiates on the reflecting mirror 64 at a fixed incident angle. The beam reflected by the reflecting mirror 64 passes vertically through the focusing mirror and the protective mirror, and is focused into a point at the focal length of the welding nozzle 5 and then output. During this process, the galvanometer motor 631 drives the reflecting mirror 64 to reciprocate. The swing of the reflecting mirror 64 makes the movement trajectory of the output laser be an arc segment that is nearly a straight line. The laser scanning length is controlled by the swing amplitude of the galvanometer motor 631, so that welds with different widths can be welded.

[0035] During application, the above is only the preferred embodiment of the present application and is not used to limit the present application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application.

Claims

1. A welding tip clamping structure, characterized in that, It includes a chuck (1), which is a tubular structure. A plurality of notches are arranged in a circumferential array and staggered on the chuck (1). The two ends of the outer wall of the chuck (1) are conical surfaces. An inner sleeve (2) is sleeved outside the chuck (1), and an outer sleeve (3) is sleeved outside the inner sleeve (2). A connecting pipe (4) is movably and coaxially installed inside the chuck (1), and a welding nozzle (5) is coaxially connected to the front end of the connecting pipe (4).

2. The welding tip clamping structure according to claim 1, characterized in that, A first flange (21) is provided on the inner wall at the rear end of the inner sleeve (2), and the first flange (21) cooperates with the conical surface at the rear side of the chuck (1).

3. The welding tip clamping structure according to claim 1, characterized in that, A second flange (31) is provided on the inner wall at the front end of the outer sleeve (3), and the second flange (31) cooperates with the conical surface at the front side of the chuck (1).

4. A welding tip clamping structure according to claim 1, characterized in that, Scales are marked on the outer wall of the connecting pipe (4).

5. A welding tip clamping structure according to claim 1, characterized in that, The inner sleeve (2) is a chuck screw sleeve, and the outer sleeve (3) is a nut. The inner sleeve (2) and the outer sleeve (3) are in threaded cooperation.

6. An integrally formed laser welding torch, characterized in that, It includes a welding nozzle clamping structure according to any one of claims 1-5.

7. The one-piece laser welding torch according to claim 6, wherein, It further includes a gun body (6) and a gun body housing that cooperates with the gun body (6). The gun body (6) is formed by casting, and the inner sleeve (2) is embedded at the front end of the gun body (6).

8. The one-piece laser welding torch according to claim 7, characterized in that, The gun body (6) includes a joint (61), a collimator mounting part (62), a motor mounting part (63), a reflector (64), a focusing lens mounting part (65), a protective lens mounting part (66), and a connecting seat (67). The connecting seat (67) is provided at the front end of the gun body (6). A wire feeding bracket (671) is provided at the lower end of the connecting seat (67). The collimator mounting part (62), the focusing lens mounting part (65), and the protective lens mounting part (66) are all detachably mounted. The collimator mounting part (62) is used to mount a collimator. A galvanometer motor (631) is installed inside the motor mounting part (63). The main shaft of the galvanometer motor (631) is connected to the reflector (64) through a bracket (632). The focusing lens mounting part (65) is used to mount a focusing lens, and the protective lens mounting part (66) is used to mount a protective lens; the joint (61) is coaxially arranged with the collimator mounting part (62), the focusing lens mounting part (65) is coaxially arranged with the protective lens mounting part (66), the intersection of the axis of the collimator mounting part (62) and the axis of the focusing lens mounting part (65) is located on the reflecting surface of the reflector (64), and the reflector (64) is arranged perpendicular to the angular bisector of the axis of the collimator mounting part (62) and the axis of the focusing lens mounting part (65).

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