Suspension annular air knife structure for laser welding

Abstract

The utility model relates to a suspension annular air knife structure for laser welding, which comprises a welding gun body, a laser mechanism and a welding mechanism, the laser mechanism is internally provided with a light path cavity, and the welding mechanism is internally provided with a welding cavity; the laser assembly is arranged in the laser mechanism, the laser assembly comprises a reflecting mirror assembly and a focusing mirror assembly, and the reflecting mirror assembly and the focusing mirror assembly are sequentially arranged in the light path cavity in the transmission direction of the light beams in the light path cavity; the light inlet assembly is arranged at the upper end of the welding gun body, and the light inlet assembly communicates with the light path cavity; the air pipe assembly is connected to the side wall of the welding gun body, an annular connecting piece is arranged in the welding cavity, the annular connecting piece and the inner wall of the welding gun body surround and form a closed space, the air pipe assembly communicates with the closed space through a connector, a plurality of sets of connecting air holes penetrating through the end face are formed in the upper end of the annular connecting piece, and the annular connecting piece is arranged below the focusing lens assembly. By means of the structure, impurities on the focus lens assembly in the welding gun are removed, the welding precision of products is improved, and meanwhile the service life of the laser assembly is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of laser welding, in particular to a suspended annular air knife structure for laser welding. Background Art

[0002] Laser welding is a highly efficient and precise welding method that utilizes a high-energy-density laser beam as a heat source. It is a key application of laser material processing technology and is applicable to welding jewelry, cathode ray tubes, sensors, aluminum alloys, laptop casings, mobile phone batteries, molds, electrical accessories, stainless steel products, and zinc alloy crafts. One of its core components is the focusing lens assembly. The focusing lens assembly plays a crucial role in the laser welding process, which exposes it to harsh working environments. Spatter, soot, and other impurities generated during welding can adhere to the lens surface, shortening its service life.

[0003] Therefore, there is an urgent need to provide a laser-welded suspended annular air knife structure to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and defects of the existing technology and provide a suspended annular air knife structure for laser welding, which completes the removal of impurities on the focusing mirror assembly in the welding gun, improves the welding accuracy of the product, and prolongs the service life of the laser assembly.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A laser welding suspended annular air knife structure, characterized by comprising:

[0007] The welding gun body includes a laser mechanism and a welding mechanism, wherein the laser mechanism is provided with an optical path cavity, and the welding mechanism is provided with a welding cavity;

[0008] A laser assembly is provided in the laser mechanism, the laser assembly comprising a reflector assembly and a focusing mirror assembly, and the reflector assembly and the focusing mirror assembly are sequentially arranged in the optical path cavity along the transmission direction of the light beam in the optical path cavity; the reflector assembly is used to vertically reflect the light beam out of the optical path cavity, and the focusing mirror assembly is used to focus the light beam vertically reflected by the reflector assembly to form a light spot for welding;

[0009] A light input assembly is provided at the upper end of the welding gun body, and the light input assembly is communicated with the light path cavity to input the light beam into the light path cavity;

[0010] The gas pipe assembly is connected to the side wall of the welding gun body, the annular connecting piece is arranged in the welding cavity, the annular connecting piece is surrounded by the inner wall of the welding gun body to form a closed space, the gas pipe assembly is communicated with the closed space through the interface, and the upper end of the annular connecting piece is provided with a plurality of groups of connecting air holes penetrating the end face, and the annular connecting piece is arranged below the focusing mirror assembly.

[0011] Optionally, the annular connecting piece is movably connected to the inner wall of the welding gun body, a blank gap is arranged at the connecting position of the annular connecting piece and the inner wall of the welding gun body, and a sealing assembly is arranged below the annular connecting piece, so as to isolate the welding cavity from the outside.

[0012] Optionally, the annular connecting piece has a connecting position and a suspended position, when the annular connecting piece is in the connecting position, the annular connecting piece is connected to the inner wall of the welding gun body; when the annular connecting piece is in the suspended position, a blank gap is formed between the annular connecting piece and the inner wall of the welding gun body.

[0013] Optionally, the mirror assembly comprises an X-axis mirror, an X-axis motor, a Y-axis mirror and a Y-axis motor, the X-axis mirror is connected to the rotating shaft of the X-axis motor, and the Y-axis mirror is connected to the rotating shaft of the Y-axis motor; the X-axis mirror is arranged directly below the light inlet assembly, the X-axis motor is used to drive the X-axis mirror to rotate at an angle along the X-axis, and the Y-axis mirror is used to drive the Y-axis mirror to rotate at an angle along the Y-axis.

[0014] Optionally, the laser assembly further comprises a beam combining mirror assembly, the beam combining mirror assembly is arranged in the light path cavity and adjacent to the Y-axis mirror; the beam combining mirror assembly is used to adjust the diameter and divergence angle of the laser beam.

[0015] Optionally, the lens of the focusing mirror assembly is a focusing convex lens, and the focusing convex lens is detachably connected to the inner wall of the welding gun body.

[0016] Optionally, a plurality of groups of the gas pipe assemblies are arranged, the plurality of groups of the gas pipe assemblies are communicated with the closed space through the interface, and one end of the gas pipe assembly is connected to the fan assembly.

[0017] Compared with the prior art, the welding gun body has the beneficial effects that:

[0018] In the utility model, the suspended annular air knife structure of laser welding includes a welding gun body, a laser assembly, a light-inlet assembly and an air pipe assembly; the welding gun body includes a laser mechanism and a welding mechanism, wherein the laser mechanism is arranged at the upper end of the welding mechanism, and is used to provide the welding mechanism with a laser beam for welding; an optical path cavity is provided in the laser mechanism, and a welding cavity is provided in the welding mechanism; the laser assembly is arranged in the laser mechanism, and includes a reflector assembly and a focusing mirror assembly, and the reflector assembly and the focusing mirror assembly are sequentially arranged in the optical path cavity along the transmission direction of the light beam in the optical path cavity; the focusing mirror assembly is used to focus the light beam vertically reflected by the reflector assembly to form a light spot for welding; the light-inlet assembly is arranged at the upper end of the welding gun The upper end of the main body; the air pipe assembly is connected to the side wall of the welding gun body, and an annular connector is provided in the welding cavity. The annular connector and the inner wall of the welding gun body are surrounded to form a closed space. The air pipe assembly is connected to the closed space through an interface, and the upper end of the annular connector is provided with a plurality of groups of connecting air holes that penetrate the end face. The annular connector is arranged below the focusing lens assembly, that is, by blowing air into the air pipe assembly, an air knife is formed to enter the welding gun body. Through the connecting air holes, the air knife moves upward to complete the removal of impurities or dust on the focusing lens assembly; through the arrangement of the above-mentioned components, the impurities on the focusing lens assembly in the welding gun are removed, the welding accuracy of the product is improved, and the service life of the laser assembly is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the utility model.

[0020] Figure 2 for Figure 1 Schematic cross-sectional view along direction A.

[0021] Figure 3 for Figure 2 A partial enlarged view of the middle BB.

[0022] Figure 4 It is a partial perspective view of the present utility model.

[0023] The above drawings include the following reference numerals:

[0024] 1. Welding gun body, 11. Optical path cavity, 12. Welding cavity, 2. Laser assembly, 21. Reflector assembly, 211. X-axis reflector, 212. X-axis motor, 213. Y-axis reflector, 214. Y-axis motor, 22. Focusing mirror assembly, 23. Beam combining mirror assembly, 3. Light inlet assembly, 41. Air pipe assembly, 42. Ring connector, 43. Interface. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below with reference to the embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0026] The technical solution of the utility model proposes a laser-welded suspended annular air knife structure.

[0027] Reference Figures 1 to 4 , in this embodiment, including:

[0028] The welding gun body 1 includes a laser mechanism and a welding mechanism. The laser mechanism is provided with an optical path cavity 11, and the welding mechanism is provided with a welding cavity 12.

[0029] The laser assembly 2 is provided in the laser mechanism and includes a reflector assembly 21 and a focusing mirror assembly 22. The reflector assembly 21 and the focusing mirror assembly 22 are sequentially arranged in the optical path cavity 11 along the transmission direction of the light beam in the optical path cavity 11. The reflector assembly 21 is used to vertically reflect the light beam out of the optical path cavity 11, and the focusing mirror assembly 22 is used to focus the light beam vertically reflected by the reflector assembly 21 to form a light spot for welding.

[0030] The light input assembly 3 is provided at the upper end of the welding gun body 1 and is in communication with the optical path cavity 11 for inputting the light beam into the optical path cavity 11;

[0031] The air pipe assembly 41 is connected to the side wall of the welding gun body 1. An annular connector 42 is provided in the welding cavity 12. The annular connector 42 and the inner wall of the welding gun body 1 surround and form a closed space. The air pipe assembly 41 is connected to the closed space through the interface 43. The upper end of the annular connector 42 is provided with several groups of connecting air holes that pass through the end surface. The annular connector 42 is arranged below the focusing lens assembly 22.

[0032] Optionally, in this embodiment, the suspended annular air knife structure of the laser welding includes a welding gun body 1, a laser assembly 2, a light input assembly 3 and an air pipe assembly 41; the welding gun body 1 includes a laser mechanism and a welding mechanism, wherein the laser mechanism is arranged at the upper end of the welding mechanism, and the laser mechanism is used to provide the welding mechanism with a laser beam for welding; an optical path cavity 11 is provided in the laser mechanism, and a welding cavity 12 is provided in the welding mechanism; the laser assembly 2 is provided in the laser mechanism, and includes a reflector assembly 21 and a focusing mirror assembly 22, and the reflector assembly 21 and the focusing mirror assembly 22 are sequentially arranged in the optical path cavity 11 along the transmission direction of the light beam in the optical path cavity 11; the reflector assembly 21 is used to reflect the light beam vertically out of the optical path cavity 11, and to reflect the light beam entering the optical path cavity 11 to achieve the purpose of light beam steering and reflection; the focusing mirror assembly 22 is used to focus the light beam after vertical reflection by the reflector assembly 21 to form a light spot for welding, that is, by adjusting the curvature and position of the lens, the light beam is finally focused on one point, which can be used during welding A higher temperature is generated during the welding process, thereby improving welding efficiency and quality; the light inlet component 3 is provided at the upper end of the welding gun body 1, and the light inlet component 3 is connected to the optical path cavity 11, for inputting the light beam into the optical path cavity 11; the air pipe component 41 is connected to the side wall of the welding gun body 1, and the welding cavity 12 is provided with an annular connector 42, the annular connector 42 and the inner wall of the welding gun body 1 are surrounded to form a closed space, the air pipe component 41 is connected to the closed space through the interface 43, and the upper end of the annular connector 42 is provided with a plurality of groups of through The connecting air hole on the end face, the annular connecting part 42 is arranged below the focusing lens assembly 22, that is, by blowing air into the air pipe assembly 41, an air knife is formed to enter the welding gun body 1, and the air knife moves upward through the connecting air hole to complete the removal of impurities or dust on the focusing lens assembly 22, thereby improving the accuracy and service life of the focusing lens assembly 22; through the setting of the above-mentioned components, the impurities on the focusing lens assembly 22 in the welding gun are removed, the welding accuracy of the product is improved, and the service life of the laser assembly 2 is extended.

[0033] In the embodiment, the annular connecting piece 42 is movably connected to the inner wall of the welding gun body 1, and a blank gap is arranged at the connecting position of the annular connecting piece 42 and the inner wall of the welding gun body 1, and a sealing assembly is arranged below the annular connecting piece 42, which is used to isolate the welding cavity 12 from the outside. Further, in the embodiment, the annular connecting piece 42 has a connecting position and a suspended position. Since the blank gap is arranged at the connecting position of the annular connecting piece 42 and the inner wall of the welding gun body 1, when the annular connecting piece 42 is in the connecting position, that is, the laser welding machine does not perform welding work, the annular connecting piece 42 is connected to the inner wall of the welding gun body 1, and the air pipe assembly 41 does not perform air blowing. When the annular connecting piece 42 is in the suspended position, that is, the laser welding machine performs welding work, the sealing assembly is closed to prevent impurities generated during welding from affecting the focusing mirror assembly 22, but part of the impurities may still enter the welding cavity 12, and the air pipe assembly 41 performs air blowing. Under the influence of the air knife, the blank gap exists between the annular connecting piece 42 and the inner wall of the welding gun body 1, and the air knife removes the impurities on the focusing mirror assembly 22 through the interface 43.

[0034] In the embodiment, the mirror assembly 21 includes an X-axis mirror, an X-axis motor, a Y-axis mirror and a Y-axis motor. The X-axis mirror is connected to the rotating shaft of the X-axis motor, and the Y-axis mirror is connected to the rotating shaft of the Y-axis motor. The X-axis mirror is arranged directly below the light inlet assembly 3, the X-axis motor is used to drive the X-axis mirror to rotate at an angle along the X-axis, and the Y-axis mirror is used to drive the Y-axis mirror to rotate at an angle along the Y-axis. The mirror is driven to rotate by the motor, so that the mirror can move quickly and be positioned, thereby meeting the complex welding task.

[0035] In the embodiment, the laser assembly 2 further includes a beam combiner assembly 23. The beam combiner assembly 23 is arranged in the light path cavity 11 and adjacent to the Y-axis mirror, and is used to adjust the diameter and divergence angle of the laser beam. During the laser welding process, the beam combiner can expand the laser beam from the initial small diameter to the required large diameter, or can converge the laser beam from the large divergence angle to the small angle. This adjustment function is crucial for achieving accurate welding depth and width, and can also ensure that the laser beam uniformly irradiates the workpiece surface during the welding process, thereby improving the welding quality.

[0036] In the embodiment, the air pipe assembly 41 is provided in multiple groups, and the multiple groups of air pipe assemblies 41 are connected to the sealed space through the interface 43. One end of the air pipe assembly 41 is connected to the fan assembly, and the fan assembly is used to provide wind power to form an air knife to remove the impurities on the focusing mirror assembly 22.

[0037] In the embodiment, the focusing lens assembly 22 is a focusing convex lens, which is detachably connected to the inner wall of the welding gun body 1, so that the focusing convex lens can be conveniently replaced.

[0038] The above-described embodiments only express the implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A laser welding suspended annular air knife structure, characterized in that: include: The welding gun body includes a laser mechanism and a welding mechanism, wherein the laser mechanism is provided with an optical path cavity, and the welding mechanism is provided with a welding cavity; A laser assembly is provided in the laser mechanism, the laser assembly comprising a reflector assembly and a focusing mirror assembly, and the reflector assembly and the focusing mirror assembly are sequentially arranged in the optical path cavity along the transmission direction of the light beam in the optical path cavity; the reflector assembly is used to vertically reflect the light beam out of the optical path cavity, and the focusing mirror assembly is used to focus the light beam vertically reflected by the reflector assembly to form a light spot for welding; A light input assembly is provided at the upper end of the welding gun body, and the light input assembly is communicated with the light path cavity to input the light beam into the light path cavity; The air pipe assembly is connected to the side wall of the welding gun body. An annular connector is provided in the welding cavity. The annular connector and the inner wall of the welding gun body surround and form a closed space. The air pipe assembly is connected to the closed space through an interface, and the upper end of the annular connector is provided with several groups of connecting air holes that penetrate the end surface. The annular connector is arranged below the focusing lens assembly.

2. The laser welding suspended annular air knife structure according to claim 1, characterized in that: The annular connector is movably connected to the inner wall of the welding gun body. A blank gap is provided at the connection between the annular connector and the inner wall of the welding gun body, and a closing component is provided below the annular connector to isolate the welding cavity from the outside world.

3. The laser welding suspended annular air knife structure according to claim 2, characterized in that: The annular connector has a connection position and a suspension position. When the annular connector is in the connection position, the annular connector maintains connection with the inner wall of the welding gun body; when the annular connector is in the suspension position, there is a blank gap between the annular connector and the inner wall of the welding gun body.

4. The laser welding suspended annular air knife structure according to claim 1, characterized in that: The reflector assembly includes an X-axis reflector, an X-axis motor, a Y-axis reflector and a Y-axis motor. The X-axis reflector is connected to the rotating shaft of the X-axis motor, and the Y-axis reflector is connected to the rotating shaft of the Y-axis motor. The X-axis reflector is arranged directly below the light input assembly. The X-axis motor is used to drive the X-axis reflector to rotate along the X-axis, and the Y-axis reflector is used to drive the Y-axis reflector to rotate along the Y-axis.

5. The laser welding suspended annular air knife structure according to claim 4, characterized in that: The laser assembly further includes a beam combining mirror assembly, which is disposed in the optical path cavity and adjacent to the Y-axis reflector; the beam combining mirror assembly is used to adjust the diameter and divergence angle of the laser beam.

6. The laser welding suspended annular air knife structure according to claim 1, characterized in that: The lens of the focusing lens assembly is a focusing convex lens, and the focusing convex lens is detachably connected to the inner wall of the welding gun body.

7. The laser welding suspended annular air knife structure according to claim 1, characterized in that: The air pipe assembly is provided with multiple groups, and the multiple groups of air pipe assemblies are connected to the enclosed space through interfaces, and one end of the air pipe assembly is connected to the fan assembly.

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