A laser-arc hybrid welding system

Abstract

The application discloses a laser-arc hybrid welding system, laser is divided into left and right two paths through laser access pipe, collimating mirror, focusing mirror to conical mirror, the upper half of the left and right two paths is reflected by the first plane mirror and is shot from the bottom through hole of the protection frame, the lower half of the left and right two paths is reflected by the second plane mirror, third plane mirror and inverted conical mirror and is shot from the bottom through hole of the protection frame, forming two annular light beams; the mechanical hand is used for driving the parallel light beam output by the annular light beam generator and the arc formed by the arc welding device to fuse the same position, thereby simultaneously carrying out laser welding and arc welding on the workpiece.The application has the advantages that since the light beam formed by the annular light beam generator is a straight light beam, no matter how far the annular light beam generator is from the welding point position, as long as the light beam irradiation angles are the same, the formed light circles at the welding point are the same, if a certain range of angles is irradiated, such as the irradiation angle is 30 DEG to 60 DEG, the formed light circle sizes are also roughly the same, which does not require high positioning accuracy of the mechanical hand, so that the whole product cost is low.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser printing, in particular to a laser-arc composite wire melting system. BACKGROUND

[0002] The laser-arc composite wire feeding head can be applied to wire filling welding and additive manufacturing fields. Among them, the laser-arc composite wire filling welding has been widely used in industry. The laser-arc composite wire filling welding combines the advantages of laser wire filling welding and arc wire filling welding, and has the advantages of high energy utilization rate, large welding penetration, high welding speed, stable welding process, small welding deformation, and easy realization of welding of high reflectivity materials.

[0003] The laser-arc composite wire feeding head is divided into a side wire feeding type and a coaxial wire feeding type according to different wire feeding modes. For the side wire feeding type head, when used for wire filling welding or additive manufacturing, since the laser, arc and wire are not coaxial, the scanning direction has a great influence on the quality and stability of welding or forming, and the scanning has directionality. This type of head is only suitable for simple reciprocating scanning, and for complex scanning paths, such as the partition and cross scanning methods frequently used in the additive manufacturing process, there are great problems; for the coaxial wire feeding type, the wire is used as the electrode of the consumable arc welding, and the laser, arc and wire have a coaxial relationship, and can be scanned in any direction, with high processing flexibility, which is convenient for ensuring the processing quality and stability.

[0004] The authorized announcement No. CN111230303B discloses a laser-arc composite coaxial wire melting device, which reflects laser by driving motor high-speed rotation plane mirror, and forms a circumferential motion track of laser through the annular mirror for wire melting. However, since the device is internally provided with a driving motor, according to its structure, since the laser surrounds the driving motor, the driving motor cannot be driven by external power supply, and if the built-in power supply is used, the power supply needs to be frequently disassembled and replaced. Since it is in the condition of high-speed rotation. SUMMARY

[0005] The purpose of the present application is to provide a laser-arc composite wire melting system to solve the problems existing in the traditional coaxial wire melting head in the background art.

[0006] To achieve the above purpose, the present application provides the following technical scheme:

[0007] A laser-arc hybrid welding system comprises a manipulator, a ring-shaped light beam generator and an arc welding device; the ring-shaped light beam generator comprises a laser access pipe, a collimating mirror, a focusing mirror, a protective frame, a conical mirror, a first plane mirror, a second plane mirror, a third plane mirror and an inverted conical mirror; the laser access pipe, the collimating mirror, the focusing mirror and the protective frame are sequentially fixed and connected; the conical mirror is located directly above the inverted conical mirror; the conical mirror and the inverted conical mirror are coaxially arranged and coaxial with incident laser; the first plane mirror is arranged on the upper left and right sides of the protective frame; the second plane mirror and the third plane mirror are arranged on the upper and lower left and right sides of the protective frame; the first plane mirror is located above the second plane mirror and the reflection surfaces of the two are spatially uninterrupted; the laser passes through the laser access pipe, the collimating mirror, the focusing mirror and the conical mirror and is divided into two paths; the upper half of the left and right paths is reflected by the first plane mirror and emitted from the bottom through hole of the protective frame; the lower half of the left and right paths is reflected by the second plane mirror, the third plane mirror and the inverted conical mirror and emitted from the bottom through hole of the protective frame, forming two ring-shaped light beams; the manipulator is used to drive the parallel light beams output by the ring-shaped light beam generator and the arc formed by the arc welding device to melt the wire at the same position, so as to simultaneously perform laser welding and arc welding on the workpiece.

[0008] Compared with the prior art, the present application has the following advantages:

[0009] (1) Since the light beam formed by the ring-shaped light beam generator is a straight light beam, no matter how far the ring-shaped light beam generator is from the welding point position, as long as the light beam irradiation angle is the same, the formed light circle at the welding point is the same, and if a certain range of angles is irradiated, such as an irradiation angle of 30°-60°, the size of the formed light circle is also approximately the same, which does not require high positioning accuracy of the manipulator, so that the overall product cost is low.

[0010] (2) The light beam has a short overall travel from input to output and does not undergo transformation, the light beam energy loss is small, the available laser power is high, and the overall structure is simple and low in cost.

[0011] (3) The ring-shaped light beam generator outputs two ring-shaped light beams, which can appropriately increase the area of one-time processing. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the laser-arc hybrid welding system of the present application.

[0013] Figure 2 It is a schematic diagram of the structure of the ring-shaped light beam generator of the present application.

[0014] In the figure: 1, manipulator; 2, annular light beam generator; 21, laser access pipe; 22, collimating mirror; 23, focusing mirror; 24, protective frame; 25, supporting bottom plate; 26, conical mirror; 27, annular mirror; 28, fan-shaped opening; 29, connecting baffle; 3, electric arc welding device; 31, electric arc power supply; 32, electric arc welding torch; 33, wire; 34, electric arc; 4, workpiece. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

[0016] Please refer to Figure 1 and Figure 2 , the present application provides a laser-arc hybrid welding system, comprising a manipulator 1, an annular light beam generator 2 and an electric arc welding device 3; the annular light beam generator 2 comprises a laser access pipe 21, a collimating mirror 22, a focusing mirror 23, a protective frame 24, a conical mirror 25, a first plane mirror 26, a second plane mirror 27, a third plane mirror 28 and an inverted conical mirror 29; the laser access pipe 21, the collimating mirror 22, the focusing mirror 23 and the protective frame 24 are sequentially fixed and connected, the conical mirror 26 is located directly above the inverted conical mirror 29, the conical mirror 26 and the inverted conical mirror 29 are coaxially arranged and coaxial with the incident laser, the first plane mirror 26 is arranged on the left and right sides of the upper part of the protective frame 24, the second plane mirror 27 and the third plane mirror 28 are arranged on the left and right sides of the upper and lower parts of the protective frame 24, the first plane mirror 26 is located above the second plane mirror 27 and the reflecting surfaces of the two are not interrupted in space (the reflecting surfaces do not overlap and there is no reflecting gap between the two, i.e. the laser is reflected by the first plane mirror 26 or the second plane mirror 27), the laser passes through the laser access pipe 21, the collimating mirror 22, the focusing mirror 23 and the conical mirror 25 and is divided into two paths, the upper half of the left and right paths is reflected by the first plane mirror 26 and emitted from the bottom through hole 241 of the protective frame 24, and the lower half of the left and right paths is reflected by the second plane mirror 27, the third plane mirror 28 and the inverted conical mirror 29 and emitted from the bottom through hole 241 of the protective frame 24, forming two annular light beams; the manipulator 1 is used to drive the parallel light beams output by the annular light beam generator 2 and the electric arc 34 formed by the electric arc welding device 3 (the electric arc welding device comprises an electric arc power supply 31, an electric arc welding torch 32 and a wire 33) to melt the wire at the same position, so as to simultaneously perform laser welding and electric arc welding on the workpiece 4.

[0017] In the present application, the light beam formed by the annular light beam generator 2 is a straight light beam, so no matter how far the annular light beam generator 2 is from the welding point position, as long as the light beam irradiation angle is the same, the formed light circle at the welding point is the same, and if the angle within a certain range is irradiated, such as the irradiation angle is 30°-60°, the size of the formed light circle is also approximately the same, which does not require high positioning accuracy of the manipulator.

[0018] In the present application, the light beam output by the annular light beam generator 2 is two annular lights, which can appropriately increase the area of one-time processing.

[0019] 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 replacements for part of the 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 laser-arc hybrid welding system, characterized by: The utility model relates to a laser-electric arc hybrid welding device, which comprises a mechanical arm (1), a ring-shaped light beam generator (2) and an electric arc welding device (3); the ring-shaped light beam generator (2) comprises a laser access pipe (21), a collimating mirror (22), a focusing mirror (23), a protective frame (24), a conical mirror (25), a first plane mirror (26), a second plane mirror (27), a third plane mirror (28) and an inverted conical mirror (29); the laser access pipe (21), the collimating mirror (22), the focusing mirror (23) and the protective frame (24) are sequentially fixed and connected; the conical mirror (25) is located directly above the inverted conical mirror (29); the conical mirror (25) and the inverted conical mirror (29) are coaxially arranged and coaxial with the incident laser; the first plane mirror (26) is arranged on the left and right sides of the upper part of the protective frame (24); the second plane mirror (27) and the third plane mirror (28) are arranged on the left and right sides of the upper and lower parts of the protective frame (24); the first plane mirror (26) is located above the second plane mirror (27) and the reflecting surfaces of the two are not interrupted in space; the reflecting surfaces of the first plane mirror (26) and the second plane mirror (27) are not overlapped, and there is no reflecting gap between the two; the laser is reflected by the first plane mirror (26) or the second plane mirror (27); the laser passes through the laser access pipe (21), the collimating mirror (22), the focusing mirror (23) and the conical mirror (25) and is divided into two paths; the upper half of the left and right paths is reflected by the first plane mirror (26) and emitted from the bottom through hole (241) of the protective frame (24); the lower half of the left and right paths is reflected by the second plane mirror (27), the third plane mirror (28) and the inverted conical mirror (29) and emitted from the bottom through hole (241) of the protective frame (24), forming two ring-shaped light beams; the mechanical arm (1) is used to drive the parallel light beams output by the ring-shaped light beam generator (2) and the electric arc (34) formed by the electric arc welding device (3) to melt the wire at the same position, so that the workpiece (4) is simultaneously subjected to laser welding and electric arc welding.

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