Laser welding equipment

Abstract

The utility model discloses laser welding equipment. The laser welding equipment comprises a positioning unit, a pressing unit, an XY-axis moving unit and a laser welding unit, the positioning unit is used for positioning a to-be-welded workpiece below the pressing unit, and the pressing unit is used for pressing and fixing the to-be-welded workpiece; the XY-axis moving unit comprises a first moving guide rail and a second moving guide rail, the moving directions of the first moving guide rail and the second moving guide rail are perpendicular to each other, and the second moving guide rail is erected above the first moving guide rail; the positioning unit and the pressing unit are arranged on the first movement guide rail, and the laser welding unit is arranged on the second movement guide rail. According to the laser welding equipment, a workpiece to be welded can be accurately positioned and pressed, the workpiece is accurately moved through the XY-axis moving unit, and welding operation is completed through the laser welding unit; accurate positioning, stable pressing, accurate moving and efficient welding of the workpiece are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to laser processing technical field especially relates to a laser welding equipment. BACKGROUND

[0002] Laser welding is a kind of high-efficiency precision welding method using high-energy density laser beam as heat source, and is one of important aspects of laser processing technology application.Laser is focused on the surface of part through lens, and the heat generated by laser beam melts plastic contact surface, and then thermoplastic sheet, film or molded parts are bonded together.The specific process is as follows, laser welding uses transmission welding principle, and selects infrared laser as welding heat source.For the laser of 800nm-1100nm waveband, the absorption rate of most transparent or colored thermoplastic is low, so the energy loss of laser through plastic is less.The upper and lower materials must meet certain requirements: the upper material can transmit laser to the maximum extent, and the lower material can absorb laser to the maximum extent.Laser transmits through the upper material and reaches the surface of the lower material, and the lower material absorbs laser to generate a large amount of heat, and the heat melts the upper material through heat conduction to form a weld under the action of clamping force.However, the traditional laser welding equipment often has problems such as inaccurate positioning, unstable pressing, inflexible movement, etc., which affects the precision and efficiency of welding.Therefore, it is of great significance to develop a laser welding equipment that can automatically position, stably press, accurately move and efficiently weld. SUMMARY

[0003] The utility model discloses a laser welding equipment to solve the problem in the background art, to achieve the above object, the utility model provides the following technical scheme:

[0004] A laser welding equipment, comprising a positioning unit, a pressing unit, an XY-axis moving unit and a laser welding unit, the positioning unit is used to position the workpiece to be welded below the pressing unit, and the pressing unit is used to press and fix the workpiece to be welded, the XY-axis moving unit comprises a first movement guide rail and a second movement guide rail, the movement directions of which are perpendicular to each other, and the second movement guide rail is erected above the first guide rail, the positioning unit and the pressing unit are arranged on the first movement guide rail, and the laser welding unit is arranged on the second movement guide rail.

[0005] Further, the positioning unit comprises a base, a moving device and a positioning piece, the positioning piece is used to position the workpiece to be welded, the positioning piece is arranged on the moving device, the moving device is arranged on the base, and the pressing unit is erected above the base, and the workpiece to be welded is moved to the lower side of the pressing unit through the moving device.

[0006] Further, the pressing unit comprises a lifting device and a pressing plate, the lifting device is used for driving the pressing plate to lift and fall; a transparent glass is arranged in the pressing plate, and the positioning unit positions the workpiece to be welded below the transparent glass, so that the laser passes through the transparent glass to weld.

[0007] Further, the pressing plate is further provided with a pop-up device, and the pop-up device is used for driving the workpiece to be welded to separate from the transparent glass.

[0008] Further, the pop-up device comprises a mounting assembly, a telescopic piece and a compression spring; the mounting assembly is mounted in the transparent glass; the telescopic piece is slidingly connected in the mounting assembly, and the compression spring is connected between the telescopic piece and the mounting assembly; the pre-tightening force of the compression spring drives one end of the telescopic piece to extend below the transparent glass, so as to drive the workpiece to be welded to separate from the transparent glass.

[0009] Further, the pop-up device further comprises a limiting piece, the limiting piece is arranged above the transparent glass and connected with the telescopic piece, so as to limit the telescopic piece to completely pop up outside the transparent glass.

[0010] Further, the mounting assembly comprises a mounting nut and a hollow screw rod, the mounting nut is fixed in the transparent glass, and the hollow screw rod is threadedly connected in the mounting nut; the telescopic piece and the compression spring are arranged in the hollow screw rod.

[0011] The laser welding equipment has the advantages that: the laser welding equipment has compact and reasonable overall structure, the connection between the components is stable and reliable, and the long-term stable operation of the equipment is ensured; the workpiece to be welded can be accurately positioned and pressed, the workpiece is accurately moved through the XY axis moving unit, and the welding operation is completed through the laser welding unit; the workpiece to be welded is accurately positioned, stably pressed, accurately moved and efficiently welded, and the welding is more firm and the sealing effect of the welding position is better than that of the traditional ultrasonic welding mode. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structural schematic view of the utility model.

[0013] Figure 2 It is a structural schematic view of the positioning unit and the pressing unit.

[0014] Figure 3 It is a sectional view of the positioning unit and the pressing unit.

[0015] Figure 4 It is a structural schematic view of the pop-up device. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model will be described in further detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.

[0017] As shown in Figures 1 to 3 A laser welding device, comprising a positioning unit 100, a pressing unit 200, an XY axis moving unit 300 and a laser welding unit 400. The positioning unit 100 is used to position the workpiece to be welded 500 below the pressing unit 200; the pressing unit 200 is used to press and fix the workpiece to be welded 500 to prevent the workpiece from moving or deforming during the welding process; and a laser beam is used to emit the laser beam to the workpiece to be welded 500 for welding. The laser welding unit 400 guides the laser beam to the workpiece to be welded 500 through optical elements such as optical fibers or mirrors, realizing efficient and accurate welding operation. Through the cooperative work of the positioning unit 100 and the pressing unit 200, accurate positioning and stable pressing of the workpiece to be welded 500 are realized, and the precision and stability of the welding are improved. The XY axis moving unit 300 comprises a first movement guide rail 310 and a second movement guide rail 320 which are perpendicular to each other in the movement direction, and the second movement guide rail 320 is erected above the first movement guide rail 310 to form a moving system in a two-dimensional plane. The first movement guide rail 310 moves along the Y-axis direction, and the second movement guide rail 320 moves along the X-axis direction above the first movement guide rail 310. The positioning unit 100 and the pressing unit 200 are arranged on the first movement guide rail 310, and the laser welding unit 400 is arranged on the second movement guide rail 320. This design enables the laser welding unit 400 to move accurately in a two-dimensional plane relative to the workpiece to be welded 500. Through program control, the XY axis moving unit 300 drives the laser welding unit 400 and the workpiece to be welded 500 to move in the XY axis coordinate system, so that the laser welding point forms a trajectory consistent with the welding contour, meeting the demand of complex welding path.

[0018] The laser welding device has the advantages of compact and reasonable overall structure, stable and reliable connection between components, ensuring long-term stable operation of the device, accurate positioning and pressing of the workpiece to be welded, accurate movement of the workpiece through the XY axis moving unit, and completion of the welding operation by the laser welding unit. The laser welding device realizes accurate positioning, stable pressing, accurate movement and efficient welding of the workpiece to be welded, and is more firm than the traditional ultrasonic welding method, and has better sealing effect at the welding position.

[0019] The specific structure of each unit of the laser welding device is as follows:

[0020] As shown in Figure 2 and Figure 3As shown in the figure, the positioning unit 100 of the embodiment includes a base 110, a moving device 120 and a positioning piece 130; the positioning piece 130 is arranged on the moving device 120, and the positioning piece 130 is used for placing the workpiece 500 to be welded and ensuring the stability and accuracy of the workpiece during the movement. The base 110 serves as a support structure, the moving device 120 is arranged on the base 110, and the pressing unit 200 is arranged above the base 110. The moving device 120 adopts a cylinder structure, and the workpiece 500 to be welded is moved to below the pressing unit 200 by the moving device 120.

[0021] As shown in the figure, Figure 2 The pressing unit 200 of the embodiment includes a lifting device 210 and a pressing plate 220. The lifting device 210 adopts a cylinder structure and is used for driving the pressing plate 220 to lift. The transparent glass 230 is arranged in the pressing plate 220, and the positioning unit 100 positions the workpiece 500 to be welded below the transparent glass 230. After the workpiece 500 to be welded is moved to below the pressing unit 200, the lifting device 210 is used for driving the pressing plate 220 to descend, so that the transparent glass 230 is pressed on the workpiece 500 to be welded, thereby enabling the laser emitted by the laser welding unit 400 to penetrate the transparent glass 230 and directly irradiate the workpiece for welding.

[0022] As shown in the figure, Figure 3 And Figure 4 The pressing plate 220 of the embodiment further includes a pop-up device 600. The pop-up device 600 is used for driving the workpiece 500 to be welded to separate from the transparent glass 230. Specifically, the pop-up device 600 includes a mounting assembly 610, a telescopic piece 620 and a compression spring 630. The mounting assembly 610 is mounted in the transparent glass 230. The telescopic piece 620 is slidingly connected in the mounting assembly 610. The compression spring 630 is connected between the telescopic piece 620 and the mounting assembly 610. The pre-tightening force of the compression spring 630 drives one end of the telescopic piece 620 to extend below the transparent glass 230. When the welding is completed, the telescopic piece 620 pushes the workpiece to descend and pop up under the action of the spring force, thereby realizing the separation from the transparent glass 230. The design of the pop-up device 600 facilitates the quick removal of the workpiece after the welding is completed, thereby improving the automation degree and operation convenience of the equipment. In addition, the pop-up device 600 further includes a limiting piece 640. The limiting piece 640 is arranged above the transparent glass 230 and connected with the telescopic piece 620, so as to limit the telescopic piece 620 from completely popping out of the transparent glass 230, thereby preventing the telescopic piece 620 from being damaged or affecting the normal operation of the equipment.

[0023] As shown in the figure, Figure 4As shown, the mounting assembly 610 of the present embodiment comprises a mounting nut 611 fixed in the transparent glass 230 and a hollow screw 612 threadedly connected to the mounting nut 611, and the telescopic member 620 and the compression spring 630 are arranged in the hollow screw 612. This structure facilitates the installation and adjustment of the position and pre-tightening force of the pop-up device 600.

[0024] The above merely provides the preferred but not limiting embodiments of the present application, and the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A laser welding apparatus characterized by comprising: The application relates to a laser welding device, which comprises a positioning unit (100), a pressing unit (200), an XY-axis moving unit (300) and a laser welding unit (400); the positioning unit (100) is used for positioning a workpiece (500) to be welded below the pressing unit (200); the pressing unit (200) is used for tightly fixing the workpiece (500) to be welded; the XY-axis moving unit (300) comprises a first moving guide rail (310) and a second moving guide rail (320) which are perpendicular to each other in the moving direction; the second moving guide rail (320) is arranged above the first moving guide rail (310); the positioning unit (100) and the pressing unit (200) are arranged on the first moving guide rail (310), and the laser welding unit (400) is arranged on the second moving guide rail (320).

2. The laser welding apparatus according to claim 1, characterized by, The positioning unit (100) comprises a base (110), a moving device (120) and a positioning member (130); the positioning member (130) is used for positioning the workpiece (500) to be welded; the positioning member (130) is arranged on the moving device (120); the moving device (120) is arranged on the base (110); the pressing unit (200) is arranged above the base (110); the workpiece (500) to be welded is moved to below the pressing unit (200) by the moving device (120).

3. The laser welding apparatus of claim 1, wherein, The pressing unit (200) comprises a lifting device (210) and a pressing plate (220); the lifting device (210) is used for driving the pressing plate (220) to lift; a transparent glass (230) is arranged in the pressing plate (220); the positioning unit (100) positions the workpiece (500) to be welded below the transparent glass (230) so that the laser passes through the transparent glass (230) to perform welding.

4. The laser welding apparatus of claim 3, wherein, The pressing plate (220) is further provided with a pop-up device (600); the pop-up device (600) is used for driving the workpiece (500) to be welded to separate from the transparent glass (230).

5. The laser welding apparatus of claim 4, wherein, The pop-up device (600) comprises a mounting assembly (610), a telescopic member (620) and a compression spring (630); the mounting assembly (610) is mounted in the transparent glass (230); the telescopic member (620) is slidingly connected in the mounting assembly (610); the compression spring (630) is connected between the telescopic member (620) and the mounting assembly (610); the pre-tightening force of the compression spring (630) drives one end of the telescopic member (620) to extend below the transparent glass (230) so as to drive the workpiece (500) to be welded to separate from the transparent glass (230).

6. The laser welding apparatus of claim 5, wherein, The pop-up device (600) further comprises a limiting member (640); the limiting member (640) is arranged above the transparent glass (230) and connected with the telescopic member (620) so as to limit the telescopic member (620) from completely popping out of the transparent glass (230).

7. The laser welding apparatus of claim 6, wherein, The mounting assembly (610) comprises a mounting nut (611) fixed in the transparent glass (230) and a hollow screw rod (612) threaded in the mounting nut (611), and the telescopic member (620) and the compression spring (630) are arranged in the hollow screw rod (612).

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