Long and straight welding seam laser wire distance measuring device for robot laser-arc hybrid welding

Abstract

The utility model belongs to the technical field of welding, and discloses a robot laser-arc hybrid welding long straight welding seam laser wire distance measuring device which comprises a vertical pipe (2) and a laser wire distance measuring ruler (5). The top end of the vertical pipe (2) is fixed on the welding gun (3) through the tightening pipe hoop (1), and the bottom end of the vertical pipe (2) is fixedly connected with the optical fiber distance measuring scale (5); the light wire distance measuring ruler (5) is of a right-angle structure and comprises a bottom plate and a vertical part, the bottom plate is arranged at the position, to be welded, of base metal, and the vertical part of the bottom plate is connected with the vertical pipe (2); the bottom plate and the vertical part of the light filament distance measuring ruler (5) are provided with scales. The device can be applied to the robot laser-arc hybrid welding process of long and straight welding seams or annular welding seams, the programming efficiency is improved, the welding wire is in direct contact with a to-be-welded part in the programming process, the laser wire distance is measured in real time, and the posture of a welding gun of a robot can be adjusted in time according to deformation of a welded workpiece.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding, and in particular relates to a device for measuring the optical wire distance of a long straight weld seam of a robot laser arc hybrid welding. Background Art

[0002] When using a robot for laser arc hybrid welding of long, straight welds, the distance between the welding wire and the center of the laser spot directly affects weld formation. As the wire stickout length increases and the wire distance decreases, the laser welding heat source and the arc heat source become increasingly concentrated, making it more likely to burn through the weld. When the laser welding heat source and the arc heat source completely overlap, arc breakage can occur. When the wire stickout length decreases and the wire distance increases, defects such as lack of fusion and incomplete penetration can occur in the weld.

[0003] Due to the influence of workpiece deformation and assembly quality, during the programming process of the robot's long straight weld, it is necessary to use a ruler to continuously measure the extension length of the welding wire to control the distance between the welding wire and the center of the laser spot to ensure the welding quality. The programming efficiency is low during the operation.

[0004] In order to ensure that the wire distance can be varied within the range allowed by the process when the robot laser arc hybrid welding is used to weld long straight welds, a long straight weld robot laser arc hybrid welding wire distance measuring device is needed. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the programming efficiency is low when a robot is used to perform a laser arc hybrid welding process to weld long straight welds, and a ruler is needed to continuously measure the extended length of the welding wire to control the distance between the welding wire and the center of the laser spot to ensure the welding quality.

[0006] In order to solve the above technical problems, the specific technical solutions of the present utility model are as follows:

[0007] A device for measuring the wire distance of a long straight weld seam using a robot laser arc hybrid welding machine comprises a vertical tube 2 and a wire distance measuring ruler 5; the top end of the vertical tube 2 is fixed to a welding gun 3 by tightening a pipe clamp 1, and the bottom end of the vertical tube 2 is fixedly connected to the wire distance measuring ruler 5; the wire distance measuring ruler 5 is a right-angle structure, comprising a base plate and a vertical portion, the base plate being arranged at a position of the parent material to be welded, and the vertical portion being connected to the vertical tube 2; both the base plate and the vertical portion of the wire distance measuring ruler 5 are marked with scales; the scale on the vertical portion of the wire distance measuring ruler 5 is used to measure the dry extension length of the welding wire, and the scale on the base plate is used to measure the distance between the welding wire and the center of the laser spot; a through hole 503 is provided at the 0 scale line of the base plate of the wire distance measuring ruler 5 for the welding wire 7 to pass through, and the position of the through hole 503 corresponds to the position of the conductive nozzle of the welding gun.

[0008] Among them, the diameter of the welding wire is 1.2mm.

[0009] The diameter of the through hole 503 is 1.3 mm.

[0010] The top end of the vertical pipe 2 is fixed to the tightening pipe clamp 1 through a bolt and nut connector.

[0011] Wherein, the tightening pipe clamp 1 is sleeved on the welding gun 3.

[0012] The utility model has the following advantages: it can be applied to the robot laser arc hybrid welding process of long straight welds or circular welds, improves programming efficiency, during the programming process the welding wire directly contacts the part to be welded and the wire distance is measured in real time, the robot's welding gun posture can be adjusted in time according to the deformation of the workpiece to be welded, solves the problem of changes in the wire extension length due to workpiece deformation or assembly quality, and avoids welding defects such as lack of fusion, lack of penetration, and burn-through in the weld caused by changes in the wire distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the internal structure diagram of the welding protection and temperature control device housing;

[0014] Explanation of the markings in the figure: 1- pipe clamp; 2- vertical pipe; 3- welding gun; 4- nut; 5- wire distance measuring ruler; 501- welding wire dry extension measuring ruler; 502- welding wire and laser spot center measuring ruler; 503-Φ1.3 through hole; 6- bolt; 7- welding wire; 8- laser welding gun; 9- laser beam; 10- base material; 11- position to be welded. DETAILED DESCRIPTION

[0015] In order to better understand the purpose, structure and function of the present invention, the present invention is described in further detail below with reference to the accompanying drawings.

[0016] like Figure 1 As shown, the robot laser arc hybrid welding long straight weld light wire distance measuring device of this embodiment includes a pipe clamp, a vertical pipe, a welding gun, a nut, a light wire distance measuring ruler, a welding wire dry extension measuring ruler, a welding wire and laser spot center measuring ruler, a Φ1.3 through hole, a bolt, a welding wire, a laser welding gun, a laser beam, a base material, and a welding groove. The specific structural principle diagram is shown in FIG. Figure 1 shown.

[0017] Connect the vertical pipe 2 and the welding gun 3 by tightening the pipe clamp 1. The vertical pipe 2 is made of a Φ4 steel pipe and a through hole is punched at the tail end. A nut 4 is welded on one side of the through hole. Insert the side of the light wire distance measuring ruler 5 for measuring the length of the welding wire extension into the vertical pipe 2. After adjusting the height of the welding wire dry extension measuring ruler 501 and the Φ1.3 through hole 503, tighten the bolt 6 in the nut 4 to achieve the connection between the light wire distance measuring ruler 5 and the welding gun 3.

[0018] The wire distance measuring ruler 5 is at a right angle, and the length dimensions are marked on both sides using a laser marking machine. The welding wire dry extension measuring ruler 501 is used to measure the welding wire dry extension length, and the welding wire and laser spot center measuring ruler 502 is used to measure the distance between the welding wire and the laser spot center. The side for measuring the welding wire dry extension length is a cylinder. When in use, the dry extension length of the welding wire 7 is controlled by observing the scale on the cylinder. The side for measuring the welding wire and the center of the laser spot is a flat rectangular parallelepiped, and a Φ1.3 through hole 503 is punched in the direction of the 0 scale line, which can allow the Φ1.2 welding wire 7 to pass through. During installation, the Φ1.3 through hole 503 should be adjusted to be perpendicular to the conductive nozzle of the welding gun to reduce welding defects caused by the bending of the welding wire 7 and inaccurate measurement of the dry extension length and wire distance.

[0019] During robot programming, the welding wire 7 passes through the Φ1.3 through-hole 503 on the wire distance measuring ruler 5 and contacts the position 11 of the to-be-welded portion of the base material 10. By moving the robot, when the height of the to-be-welded position 11 changes, the robot can be controlled in real time to make adjustments, so that the robot's welding wire 7 dry extension length and the wire distance are maintained at a fixed value. When the robot programming is completed for automated welding, the bolt 6 is loosened and the wire distance measuring ruler 5 is removed to perform automated welding by the robot, thereby improving the programming efficiency and welding quality of the welding robot.

[0020] The key points of this utility model:

[0021] 1. The wire distance measuring ruler can measure the wire extension length and the distance between the wire and the center of the laser spot in real time.

[0022] 2. In order to reduce the influence of the curvature of the welding wire on the measurement of the wire distance, a Φ1.3 through hole is punched on the side of the wire distance measuring ruler for measuring the distance between the welding wire and the center of the laser spot. When installing the measuring ruler, the Φ1.3 through hole must be perpendicular to the conductive nozzle.

[0023] 3. During the robot programming process, the welding wire directly contacts the part to be welded on the welding test plate. When the height of the workpiece to be welded changes, the programmer can control the robot to make adjustments in real time to keep the robot's wire distance at a fixed value.

[0024] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make several modifications and improvements without departing from the principles of the present invention, and these modifications and improvements should also be considered to fall within the scope of protection of the present invention.

Claims

1. A robot laser arc hybrid welding long straight weld wire distance measuring device, characterized in that: It comprises a vertical tube (2) and a light wire distance measuring ruler (5); The top end of the vertical tube (2) is fixed to the welding gun (3) by tightening the tube clamp (1), and the bottom end of the vertical tube (2) is fixedly connected to the optical wire distance measuring ruler (5); The optical wire distance measuring ruler (5) is a right-angle structure, comprising a base plate and a vertical portion, wherein the base plate is arranged at a position of the parent material to be welded, and the vertical portion is connected to the vertical pipe (2); both the base plate and the vertical portion of the optical wire distance measuring ruler (5) are provided with scales; the scale of the vertical portion of the optical wire distance measuring ruler (5) is used to measure the dry extension length of the welding wire, and the scale of the base plate is used to measure the distance between the welding wire and the center of the laser spot; A through hole (503) is provided at the 0 scale line of the bottom plate of the light wire distance measuring ruler (5) for the welding wire (7) to pass through, and the position of the through hole (503) corresponds to the position of the conductive nozzle of the welding gun.

2. The device for measuring the optical wire distance of a long straight weld seam of a robot laser arc hybrid welding machine according to claim 1 is characterized in that: The diameter of the welding wire is 1.2mm.

3. The device for measuring the optical wire distance of a long straight weld seam of a robot laser arc hybrid welding machine according to claim 2, characterized in that: The through hole diameter is 1.3 mm.

4. The device for measuring the optical wire distance of a long straight weld seam of a robot laser arc hybrid welding machine according to claim 1, characterized in that: The top end of the vertical pipe is fixed to the tightening pipe clamp by means of bolt and nut connectors.

5. The device for measuring the optical wire distance of a long straight weld seam of a robot laser arc hybrid welding machine according to claim 4, characterized in that: Tighten the pipe clamp onto the welding gun.

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