Laser welding machine

Abstract

The utility model discloses a laser welding machine which comprises a machine body, a left-right moving device installed on the machine body, an up-down moving device installed on the left-right moving device, a laser welding head installed on the up-down moving device and two workpiece rotating disc assemblies installed on the machine body on one side of the left-right moving device side by side. The workpiece rotating disc assembly comprises a rotating disc installed on the machine body and a servo motor installed on the machine body and used for driving the rotating disc to rotate, and two workpiece clamping assemblies are arranged on the rotating disc in a crossed mode. Each workpiece clamping assembly comprises two sliding grooves formed in parallel, two fixing bases installed between the two sliding grooves and oppositely arranged, a first lead screw rotationally connected between the two fixing bases, and two sliding bases installed in the sliding grooves in a sliding mode and connected with the first lead screw in a threaded mode. The double-station welding machine has double stations and is high in welding efficiency, a workpiece can rotate by an angle, multiple parts of the workpiece can be welded conveniently, the workpiece is installed stably, and welding precision is high.

Description

Technical Field

[0001] The utility model relates to the technical field of welding machines, in particular to a laser welding machine. Background Art

[0002] Laser welding machine uses high-energy laser pulses to locally heat the material in a small area. The energy of laser radiation diffuses into the interior of the material through heat conduction, melting the material to form a specific molten pool. It is a new type of welding method. Laser welding is mainly used for welding thin-walled materials and precision parts. It can realize spot welding, butt welding, lap welding, sealing welding, etc. It has a high aspect ratio, a small weld width, a small heat-affected zone, small deformation, fast welding speed, smooth and beautiful welds, no post-welding treatment or only simple treatment, high weld quality, no pores, can be precisely controlled, small focusing spot, high positioning accuracy, and easy automation.

[0003] The existing laser welding machine can only weld one workpiece at a time. After welding is completed, it is removed and replaced with another workpiece for welding. Uninterrupted welding is not possible, resulting in low welding efficiency. The workpiece cannot rotate during welding, and only one part can be welded at a time. After the welding of that part is completed, the workpiece is removed and the angle is changed before welding another part. It is inconvenient to use and has a low degree of automation. The structure of fixing the workpiece is not stable and convenient enough, the workpiece is prone to displacement or deformation, and the welding accuracy is poor. Utility Model Content

[0004] In order to overcome at least one of the technical problems existing in the prior art, the utility model provides a laser welding machine with double working stations, which can weld alternately and has high welding efficiency. The workpiece can be rotated at an angle, which is convenient for welding multiple parts of the workpiece. The workpiece is firmly installed and not easy to shift or deform, and the welding accuracy is high.

[0005] A laser welding machine comprises a machine body, a left-right moving device installed on the machine body, an up-down moving device installed on the left-right moving device, and a laser welding head installed on the up-down moving device. Two workpiece turntable assemblies are installed side by side on the machine body on one side of the left-right moving device. The workpiece turntable assembly comprises a turntable installed on the machine body, a servo motor installed on the machine body and used to drive the turntable to rotate. Two workpiece clamping assemblies are cross-arranged on the turntable. The two workpiece clamping assemblies each comprise two parallel slide grooves, two fixed seats installed between the two slide grooves and arranged oppositely, a first screw rod rotatably connected between the two fixed seats, and two sliding seats slidably installed in the slide groove and threadedly connected to the first screw rod. Left-handed threads and right-handed threads are correspondingly arranged at both ends of the first screw rod. When the first screw rod rotates, it drives the two sliding seats to move along the slide groove to clamp or release the workpiece.

[0006] In some embodiments, a workpiece positioning portion is provided on each sliding seat, and a knob is installed on at least one end of each first screw rod.

[0007] In some embodiments, the two first screw rods are vertically arranged, and an inner concave arc surface for avoiding air is arranged along the outer wall in the middle of the two first screw rods.

[0008] In some embodiments, a swing motor is installed at one end of the up and down moving device, and the laser welding head is connected to the motor shaft of the swing motor.

[0009] In some embodiments, the left and right moving device and the up and down moving device both include two symmetrically installed slide rails, a slide seat slidably connected to the two slide rails through a slider, a nut seat installed on the slide seat, a second screw rod threadedly connected to the nut seat, and a screw rod seat rotatably connected to both ends of the second screw rod. A rotating motor is connected to one end of the second screw rod. When the rotating motor drives the second screw rod to rotate, the slide seat moves in a straight line along the slide rail.

[0010] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0012] Figure 1 It is a left-view stereoscopic structural schematic diagram of the present application;

[0013] Figure 2 It is a right-side stereoscopic structural schematic diagram of the present application;

[0014] Figure 3 It is a three-dimensional structural schematic diagram of the workpiece turntable assembly and the workpiece clamping assembly;

[0015] Figure 4 yes Figure 3 A schematic diagram of a top view structure;

[0016] Figure 5 yes Figure 4 Schematic diagram of the main structure;

[0017] Figure 6 It is a three-dimensional structural schematic diagram of a left-right moving device and an up-and-down moving device.

[0018] Reference numerals:

[0019] Body 1, left-right moving device 2, up-down moving device 3, slide rail 230, slide seat 231, nut seat 232, rotating motor 233, second screw rod 234, screw rod seat 235;

[0020] Laser welding head 4, workpiece turntable assembly 5, turntable 500, servo motor 501;

[0021] Workpiece clamping assembly 6, slide groove 600, fixed seat 601, first screw rod 602, knob 6020, inner concave arc surface 6021, sliding seat 603, workpiece positioning part 6030, left-handed thread 604, right-handed thread 605;

[0022] Metal frame 7, swing motor 8. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientations or positional relationships indicated by terms such as "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside", etc., are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Reference Figure 1-Figure 6A laser welding machine comprises a body 1, a left-right moving device 2 mounted on the body 1, an up-down moving device 3 mounted on the left-right moving device 2, and a laser welding head 4 mounted on the up-down moving device 3. Two workpiece turntable assemblies 5 are mounted side by side on the body 1 on one side of the left-right moving device 2. The workpiece turntable assembly 5 comprises a turntable 500 mounted on the body 1, a servo motor 501 mounted inside the lower end of the body 1 and used to drive the turntable 500 to rotate, and two workpiece clamping assemblies 6 are vertically arranged on the turntable 500. The two workpiece clamping assemblies 6 each comprise two parallel T-shaped slide grooves 600, a symmetrically arranged servo motor 501 mounted between the two slide grooves 600, and a servo motor 502 mounted between the two slide grooves 600. Two fixed seats 601 are arranged, a first screw rod 602 is rotatably connected between the two fixed seats 601, and two sliding seats 603 are slidably installed in the slide groove 600 and threadedly connected to the first screw rod 602. The two sliding seats 603 are located between the two fixed seats 601. Left-handed threads 604 and right-handed threads 605 are correspondingly arranged at both ends of the first screw rod 602. When the first screw rod 602 rotates, it drives the two sliding seats 603 to move along the slide groove 600, and the distance between the two sliding seats 603 can be changed, so as to clamp or release the workpiece, and it can also adapt to the fixing of workpieces of different specifications. The workpiece can be a metal frame, a metal ring or a metal product of other shapes.

[0028] When in use, the two rectangular or square metal frames 7 can be first placed in the middle area between the four sliding seats 603 in the two workpiece clamping assemblies 6, and then the two first screw rods 602 can be rotated simultaneously or successively. When the first screw rod 602 rotates clockwise, the two sliding seats 603 on the same first screw rod 602 move and approach the metal frame 7 along the slide groove 600 at the same time, and finally two or four frames of the two metal frames 7 will be clamped to prevent the metal frame 7 from shifting. Then, the laser welding head 4 is moved to the position on one of the metal frames 7 that needs to be welded, such as the joint between two frames, through the left and right moving device 2 and the up and down moving device 3. Then, the laser welding head 4 is welded at the joint to close the gap at the joint and make the joint tightly connected. After the welding of the joint is completed, the servo motor 501 drives the turntable 500 and the metal frame 7 to rotate synchronously, so that the next joint of the metal frame 7 is located below the laser welding head 4, and the four joints of the metal frame 7 are welded in sequence in the same manner as above. Then, the laser welding head 4 is moved to the top of the metal frame 7 located in another workpiece clamping assembly 6 by the left and right moving device 2 and the up and down moving device 3, and it is welded in the same manner as above. In this process, the welded metal frame 7 can be taken out, and the specific method can be as follows: the two first screw rods 602 can be rotated simultaneously or successively. When the first screw rod 602 rotates counterclockwise, the two sliding seats 603 on the same first screw rod 602 move simultaneously along the slide groove 600 in the opposite direction of the metal frame 7, and finally the two sliding seats 603 are separated from the four frames of the metal frame 7, so that the welded metal frame 7 can be taken out. The present application has two workstations, which can hold two workpieces at the same time. The two workpieces can be welded alternately, and uninterrupted work can be performed. The welding efficiency is high, and the workpieces can be rotated at an angle, which is convenient for welding multiple parts of the workpieces. The workpieces are firmly installed and not easy to shift or deform, and the welding accuracy is high.

[0029] In some embodiments, a workpiece positioning portion 6030 is provided on each sliding seat 603, which may be an L-shaped notch or a U-shaped groove to prevent the workpiece from sliding and achieve a better positioning effect. A knob 6020 is installed on at least one end of each first screw rod 602, and the first screw rod 602 is rotated by the knob 6020, which is more convenient and labor-saving.

[0030] In some embodiments, the two first screw rods 602 are vertically arranged, and an inner concave arc surface 6021 for avoiding air is arranged along the outer wall in the middle of the two first screw rods 602, which can make the two first screw rods 602 rotate freely to avoid mutual interference.

[0031] In some embodiments, a swing motor 8 is installed at one end of the up and down moving device 3, and the laser welding head 4 is connected to the motor shaft of the swing motor 8. The swing motor 8 can make the laser welding head 4 swing left and right, so that different angles are formed between the laser welding head 4 and the workpiece, thereby facilitating welding of different parts of the workpiece, such as the front, side, etc.

[0032] In some embodiments, the left-right moving device 2 and the up-down moving device 3 both include two symmetrically installed slide rails 230, a slide seat 231 slidably connected to the two slide rails 230 through a slider, a nut seat 232 installed on the slide seat 231, a second screw rod 234 threadedly connected to the nut seat 232, and a screw rod seat 235 rotatably connected to both ends of the second screw rod 234. A rotating motor 233 is connected to one end of the second screw rod 234. When the rotating motor 233 drives the second screw rod 234 to rotate, the slide seat 231 moves linearly along the slide rails 230; the two slide rails 230 in the left-right moving device 2 are installed in parallel on the top plane of the fuselage 1, and the two slide rails 230 in the up-down moving device 3 are installed in parallel on the side of the slide seat 231 in the left-right moving device 2. The swing motor 8 is installed on the slide seat 231 in the up-down moving device 3. With the above structure, the left-right movement and up-down movement of the swing motor 8 and the laser welding head 4 can be realized. The structure is relatively simple and stable, and it is easy to use.

[0033] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. Although the embodiments of the utility model have been shown and described, ordinary technicians in this field can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and purpose of the utility model. The scope of the utility model is defined by the claims and their equivalents.

Claims

1. A laser welding machine, comprising a body, a left-right moving device mounted on the body, an up-down moving device mounted on the left-right moving device, and a laser welding head mounted on the up-down moving device, wherein: Two workpiece turntable assemblies are installed side by side on the body of one side of the left and right moving device, the workpiece turntable assembly includes a turntable installed on the body, a servo motor installed on the body and used to drive the turntable to rotate, and two workpiece clamping assemblies are cross-arranged on the turntable. The two workpiece clamping assemblies include two parallel sliding grooves, two fixed seats installed between the two sliding grooves and opposite to each other, a first screw rod rotatably connected between the two fixed seats, and two sliding seats slidably installed in the sliding groove and threadedly connected to the first screw rod. Left-handed threads and right-handed threads are correspondingly arranged at both ends of the first screw rod. When the first screw rod rotates, it drives the two sliding seats to move along the sliding groove to clamp or release the workpiece.

2. The laser welding machine according to claim 1, characterized in that: A workpiece positioning portion is arranged on each sliding seat, and a knob is installed on at least one end of each first screw rod.

3. The laser welding machine according to claim 2, characterized in that: The two first screw rods are vertically arranged, and an inner concave arc surface for avoiding air is arranged along the outer wall in the middle of the two first screw rods.

4. The laser welding machine according to any one of claims 1 to 3, characterized in that: A swing motor is installed at one end of the up-and-down moving device, and the laser welding head is connected to the motor shaft of the swing motor.

5. The laser welding machine according to claim 1, characterized in that: The left and right moving device and the up and down moving device both include two symmetrically installed slide rails, a slide seat slidably connected to the two slide rails through a slider, a nut seat installed on the slide seat, a second screw rod threadedly connected to the nut seat, and a screw rod seat rotatably connected to both ends of the second screw rod. A rotating motor is connected to one end of the second screw rod. When the rotating motor drives the second screw rod to rotate, the slide seat moves linearly along the slide rail.

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