WO2023283986A1

WO2023283986A1 - Flexible gas protection apparatus for laser welding

Info

Publication number: WO2023283986A1
Application number: PCT/CN2021/107807
Authority: WO
Inventors: 许飞; 李侠; 唐建波; 徐志萍; 符春红
Original assignee: 蓝达合智能装备(苏州)有限公司
Priority date: 2021-07-14
Filing date: 2021-07-22
Publication date: 2023-01-19
Also published as: DE212021000159U1; CN216138340U

Abstract

Disclosed in the present utility model is a flexible gas protection apparatus for laser welding, the flexible gas protection apparatus comprising a flexible gas supply box, wherein a gas supply pipe is mounted on a side wall of the flexible gas supply box; a first split-type gas box is provided on a side of the flexible gas supply box, and a second split-type gas box is provided on the side of the first split-type gas box that is away from the flexible gas supply box; both the first split-type gas box and the second split-type gas box are provided with a gas inlet on one side, and provided with a gas outlet on the side that is away from the gas inlet; and the end of the gas supply pipe that is away from the flexible gas supply box is fixedly connected to the gas inlet on one side of the first split-type gas box. The device can fit with a molded surface of a workpiece after the workpiece is welded, fully protects the surface of a welding seam with a flexible gas to improve the welding quality, and effectively removes the vapor cloud formed above a welding region to reduce the light energy loss during laser welding in order to improve the coupling between the light energy and the welding workpiece.

Description

A flexible gas shielding device for laser welding

technical field

The utility model relates to a flexible gas protection device, in particular to a flexible gas protection device for laser welding, which belongs to the technical field of welding processing.

Background technique

Laser welding is a process in which a high-power focused laser beam is used as a heat source, and the laser beam is directly irradiated onto the surface of the material. Through the interaction between the laser and the material, the material is melted and connected to form an excellent welded joint. The steam cloud and Liquid droplets on the incident path of the laser beam will have a shielding effect on the laser beam, resulting in a large amount of light energy loss, thereby affecting the welding quality. Therefore, improvements are made to address the above problems.

technical problem

The purpose of this utility model is to provide a flexible gas protection device for laser welding in order to solve the above problems, which can fit the workpiece surface after the workpiece is welded, and the flexible gas can fully protect the surface of the weld seam, improve the welding quality, and effectively remove The steam cloud formed above the welding area reduces the loss of light energy during laser welding and improves the coupling of light energy to the welding workpiece.

technical solution

The utility model achieves the above object through the following technical scheme, a flexible gas protection equipment for laser welding, including a flexible gas supply box, a gas supply pipe is installed on the side wall of the flexible gas supply box, and the flexible gas supply box A first split-type gas box is arranged on the side of the box, and a second split-type gas box is arranged on the side of the first split-type gas box away from the flexible gas supply box. The first split-type gas box and the second split-type gas box One side of the one-piece air box is provided with an air inlet, and the side of the first split air box and the second split air box away from the air inlet is provided with an air outlet, and the air supply pipe is far away from the flexible gas supply One end of the box is fixedly connected to the air inlet on one side of the first split-type air box, and an output Air pipe, the side of the second split-type gas tank away from the first split-type gas tank is provided with a connector, the bottom of the connector is fixed with a laser welding head, and the top of the connector is fixed with a welding wiring pipe, so A protective cover is sleeved on the outside of the connecting head, a splash guard is fixedly connected to the bottom of the protective cover, and an exhaust pipe is fixedly connected to the air outlet on one side of the second split air box, and the exhaust pipe is far away from the second One end of the split air box penetrates the outer wall of the fixed protective cover and extends to the inside of the protective cover. Fixed rods are fixed on both sides of the bottom of the connector, and an air injection pipe is fixed on the end of the fixed rod far away from the connector. The top of the pipe runs through the lower surface of the fixed exhaust pipe.

Preferably, in order to ensure the stability of the connection between the first split air box and the second split air box, connecting rods are symmetrically arranged between the first split air box and the second split air box, and the connecting rods The two ends of each are respectively fixed to the side walls of the first split air box and the second split air box by bolts.

Preferably, in order to fit the surface of the workpiece, the flexible gas can fully protect the surface of the weld seam and improve the welding quality, and the bottoms of the first split gas box and the second split gas box are fixed with protective covers, and the The lower surfaces of the first split-type air box and the second split-type air box are respectively provided with a plurality of outlets at intervals.

Preferably, in order to facilitate the discharge of the flexible gas, air guide ports are opened on both sides of the top of the protective cover, and the height of the protective cover is greater than the combined height of the connecting head and the laser welding head.

Beneficial effect

The beneficial effects of the utility model are: by setting the blower outlet and the protective cover, the workpiece can be fitted with the workpiece surface after welding, the flexible gas can fully protect the surface of the weld seam, and the welding quality can be improved; the first split type can be guaranteed by setting the connecting rod The stability of the connection between the gas box and the second split gas box, by setting a protective cover and a splash guard, prevents metal vapor and liquid droplets from splashing out, improving the safety performance of welding, and by setting a gas guide port to facilitate the discharge of flexible gas , by setting up symmetrical air jet pipes, the steam cloud formed above the welding area can be effectively removed, the light energy loss during laser welding can be reduced, and the coupling between light energy and welding workpiece can be improved.

Description of drawings

Fig. 1 is the front view of the utility model.

Fig. 2 is the bottom view of the first split air box in the utility model.

In the figure: 1. The flexible gas supply box; 2. The gas supply pipe; 3. The first split type gas box; 4. The second split type gas box; 5. The air inlet; 6. The gas outlet; 7. The gas delivery pipe; 8. Connecting head; 9. Laser welding head; 10. Welding wiring pipe; 11. Protective cover; 12. Splash shield; 13. Exhaust pipe; 14. Fixing rod; 15. Jet pipe; 16. Connecting rod; 17 , protective cover; 18, outlet; 19, air guide port.

Embodiments of the present invention

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Figure 1-2, a flexible gas protection device for laser welding, including a flexible gas supply box 1, a gas supply pipe 2 is installed on the side wall of the flexible gas supply box 1, and the flexible gas supply box 1 A first split-type gas box 3 is arranged on the side of the box 1, and a second split-type gas box 4 is arranged on the side away from the flexible gas supply box 1 of the first split-type gas box 3. One side of the box 3 and the second split air box 4 is provided with an air inlet 5, and the side of the first split air box 3 and the second split air box 4 away from the air inlet 5 is provided with an outlet. Air port 6, the end of the air supply pipe 2 away from the flexible gas supply box 1 is fixedly connected to the air inlet 5 on the side of the first split air box 3, the air outlet 6 on the side of the first split air box 3 and An air delivery pipe 7 is fixedly connected between the air inlets 5 on one side of the second split air box 4, and a connecting head 8 is provided on the side of the second split air box 4 away from the first split air box 3, so that A laser welding head 9 is fixedly connected to the bottom of the connecting head 8, a welding wiring pipe 10 is fixedly connected to the top of the connecting head 8, a protective cover 11 is sleeved on the outside of the connecting head 8, and a protective cover 11 is fixedly connected to the bottom of the protective cover 11. Splash cover 12, the air outlet 6 on one side of the second split air box 4 is fixedly connected with an exhaust pipe 13, and the end of the exhaust pipe 13 away from the second split air box 4 runs through the fixed protective cover 11 The outer wall extends to the inside of the protective cover 11. Fixed rods 14 are fixedly connected to both sides of the bottom of the connecting head 8. An air injection pipe 15 is fixedly connected to the end of the fixed rod 14 away from the connecting head 8. The top of the air injection pipe 15 runs through the solid. Connect the exhaust pipe 13 lower surface.

As a preferred technical solution of the present utility model, connecting rods 16 are arranged symmetrically between the first split air box 3 and the second split air tank 4, and both ends of the connecting rod 16 are respectively fixed by bolts. Connect the first split air box 3 and the second split air box 4 side walls.

As a preferred technical solution of the present utility model, the bottoms of the first split air box 3 and the second split air box 4 are fixedly connected with a protective cover 17, and the first split air box 3 and the second split air box The lower surface of the split air box 4 is evenly spaced with a plurality of outlets 18 .

As a preferred technical solution of the present invention, air guide ports 19 are provided on both sides of the top of the protective cover 11 , and the height of the protective cover 11 is greater than the combined height of the connecting head 8 and the laser welding head 9 .

When the utility model is in use, first, the splash guard 12 and the protective cover 11 can be pressed tightly on the workpiece to be welded, which can prevent metal vapor and liquid droplets from splashing out, improve the safety performance of welding, and start the laser welding head 9. The laser beam generated by the laser welding head 9 is irradiated on the workpiece, and the surface of the welded workpiece absorbs a large amount of heat to melt rapidly and further vaporize, forming a steam cloud above the welded workpiece, and then start the flexible gas supply box 1, and the flexible gas passes through The air jet pipe 15 is sprayed out, and the airflow generated by the flexible gas blows away the steam cloud, reduces the loss of light energy during laser welding, improves the coupling of light energy and the welding workpiece, and finally the protective cover 17 can be attached to the surface of the workpiece, from the blowing The flexible gas discharged from the outlet 18 fully protects the surface of the weld to improve the welding quality.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

Industrial Applicability

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims

A flexible gas protection device for laser welding, comprising a flexible gas supply box (1), characterized in that a gas supply pipe (2) is installed on the side wall of the flexible gas supply box (1), and the flexible gas supply box (1) A first split-type gas box (3) is arranged on the side of the gas box (1), and a second split-type gas box is arranged on the side far from the flexible gas supply box (1) of the first split-type gas box (3) (4), the first split air tank (3) and the second split air tank (4) are provided with an air inlet (5) on one side, the first split air tank (3) and the second split air tank (4) The side of the two-split air box (4) away from the air inlet (5) is provided with an air outlet (6), and the end of the air supply pipe (2) away from the flexible gas supply box (1) is fixed to the first The air inlet (5) on the side of the split air box (3), the air outlet (6) on the side of the first split air box (3) and the air inlet on the side of the second split air box (4) An air pipe (7) is fixedly connected between the air ports (5), and a connector (8) is provided on the side of the second split air tank (4) away from the first split air tank (3). The bottom of the connector (8) is fixed with a laser welding head (9), the top of the connector (8) is fixed with a welding wiring pipe (10), and the outer side of the connector (8) is sleeved with a protective cover (11) , a splash guard (12) is fixedly connected to the bottom of the protective cover (11), and an exhaust pipe (13) is fixedly connected to the air outlet (6) on one side of the second split air box (4). The end of the exhaust pipe (13) away from the second split air box (4) penetrates the outer wall of the fixed protective cover (11) and extends to the inside of the protective cover (11), and the two sides of the bottom of the connector (8) are fixed There is a fixed rod (14), and the end of the fixed rod (14) away from the connector (8) is fixed with an air injection pipe (15), and the top of the air injection pipe (15) runs through the lower surface of the fixed exhaust pipe (13) .
A flexible gas shielding device for laser welding according to claim 1, characterized in that connecting rods ( 16), both ends of the connecting rod (16) are respectively fixed to the side walls of the first split air box (3) and the second split air box (4) by bolts.
A flexible gas shielding device for laser welding according to claim 1, characterized in that: the bottoms of the first split-type gas box (3) and the second split-type gas box (4) are fixedly connected with protective covers (17).
A flexible gas shielding device for laser welding according to claim 1, characterized in that: the lower surfaces of the first split-type gas box (3) and the second split-type gas box (4) are separated by several Blow outlet (18).
A flexible gas shielding device for laser welding according to claim 1, characterized in that: there are gas guide ports (19) on both sides of the top of the shield (11), and the height of the shield (11) is greater than that of the connection Combined height of head (8) and laser welding head (9).