Structure and method for prolonging service life of protective lens of laser welding machine

Abstract

The invention discloses a structure and method for prolonging the service life of a protective lens of a laser welding machine, the structure comprises a gun head and a gas nozzle, the protective lens is arranged in the gun head, the gun head is connected with a coaxial gas guide assembly, the gas nozzle is connected with the coaxial gas guide assembly, a coaxial gas channel is arranged in the gun head, and the coaxial gas channel is communicated with the coaxial gas guide assembly. An air inlet is formed in the gun head, an upper air blowing assembly and a lower air blowing assembly are arranged on the side face of the coaxial air guiding assembly, the upper air blowing assembly horizontally blows air into the coaxial air guiding assembly, and the lower air blowing assembly blows air into the air nozzle. Through three-way blowing, the service life of the protection lens is effectively prolonged, the production effect is improved, and the cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of laser welding machines, in particular to a structure and method for extending the service life of a protective lens of a handheld laser welding machine. Background Art

[0002] The handheld laser welding heads currently used in the market are divided into single-swing handheld heads and double-swing handheld heads. The double-swing handheld heads can control the swing of two motors at the same time, and the welding modes can be point-shaped, line-shaped, circle-shaped, double O-shaped, triangle-shaped, 8-shaped, etc. In the face of different welding needs, different welding methods need to be used, such as switching to circle-shaped, double O-shaped, 8-shaped and other welding modes. In order to meet the process requirements, the welding gun will weld the workpiece surface vertically. During the welding process, the welding slag is very easy to splash onto the protective lens, causing the protective lens to burn frequently. Although the protective lens is a consumable product, frequent damage and replacement will not only affect production efficiency, but also increase production costs. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a structure and method for extending the service life of a protective lens of a laser welding machine.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A structure for extending the service life of a protective lens of a laser welding machine comprises a gun head and an air nozzle, wherein the protective lens is installed in the gun head, the gun head is connected to a coaxial air guide component, the air nozzle is connected to the coaxial air guide component, a coaxial gas channel is arranged in the gun head, the coaxial gas channel is connected to the coaxial air guide component, an air inlet is arranged on the gun head, an upper air blowing component and a lower air blowing component are arranged on the side of the coaxial air guide component, the upper air blowing component blows air horizontally into the coaxial air guide component, and the lower air blowing component blows air into the air nozzle.

[0006] The coaxial gas guide assembly includes a coaxial mounting seat, a clamping seat, a locking sleeve and a calibrated tube. The coaxial mounting seat is connected to the gun head, the locking sleeve is locked and installed with the coaxial mounting seat, the clamping seat passes through the locking sleeve and is connected to the coaxial mounting seat, the upper end of the calibrated tube extends into the locking sleeve and is installed and connected with the clamping seat, and the gas nozzle is connected to the calibrated tube.

[0007] An air guide ring is arranged in the gun head, and the air guide ring faces the coaxial mounting seat.

[0008] An insulating plate is arranged between the coaxial mounting seat and the gun head.

[0009] The upper air blowing assembly includes a wind knife bracket, a double wind knife component and an upper air pipe joint. The wind knife bracket is connected to the gun head, the double wind knife component is installed on the wind knife bracket, the air pipe joint is connected to the double wind knife component, the double wind knife component has two air outlets, and the side wall of the scale tube is provided with an open groove, and the air outlet corresponds to the open groove.

[0010] The two air outlets of the double-air blade are arranged up and down.

[0011] The lower air blowing assembly comprises a lower air pipe joint, and an air inlet hole is arranged on the side wall of the air nozzle, and the lower air pipe joint is connected with the air inlet hole of the air nozzle.

[0012] A method for extending the service life of a protective lens of a laser welding machine comprises the following steps:

[0013] The laser is emitted from the gun head and out of the air nozzle to perform the welding operation;

[0014] Set up three-way air blowing, namely coaxial air blowing, upper side air blowing and positive side air blowing;

[0015] Coaxial blowing: gas is input from the gun head, and the gas is blown out from the gun head. The gas gathers on the protective lens from top to bottom and then blows out through the air nozzle, which has the effect of dust removal and cooling the protective lens;

[0016] Upper side blowing: Blow air directly toward the graduated tube, and blow air from the opening slot of the graduated tube. The upper side blowing is located below the protective lens to prevent the welding slag generated during welding from splashing upward onto the protective lens.

[0017] Blowing from the lower side: Blow the shielding gas into the gas nozzle, and the shielding gas will be blown downward from the gas nozzle to the welding position. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the decomposition structure of the present invention;

[0019] Figure 2 Schematic diagram of gas flow in the present invention. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below, examples of which 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.

[0021] In the description of the present invention, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like are involved, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] like Figure 1 and 2 As shown, a structure for extending the service life of the protective lens of a laser welding machine includes a gun head and an air nozzle, the gun head is equipped with a protective lens, the gun head is connected to a coaxial air guide assembly, the air nozzle is connected to the coaxial air guide assembly, a coaxial gas channel is provided in the gun head, the coaxial gas channel is connected to the coaxial air guide assembly, an air inlet is provided on the gun head, an upper air blowing assembly and a lower air blowing assembly are provided on the side of the coaxial air guide assembly, the upper air blowing assembly blows horizontally toward the inside of the coaxial air guide assembly, and the lower air blowing assembly blows toward the inside of the air nozzle, forming a three-way air blowing, which plays a protective role during the welding process. The air nozzle is made of copper.

[0024] The coaxial gas guide assembly includes a coaxial mounting seat, a holder, a locking sleeve and a graduated tube. The coaxial mounting seat is connected to the gun head. The locking sleeve is locked and installed with the coaxial mounting seat. The holder passes through the locking sleeve and is connected to the coaxial mounting seat. The upper end of the graduated tube extends into the locking sleeve and is installed and connected with the holder. The gas nozzle is connected to the graduated tube. An air guide ring is arranged in the gun head. The air guide ring faces the coaxial mounting seat. Through the air guide ring, the gas in the gun head has guiding properties. A hollow channel is formed inside the coaxial mounting seat to facilitate gas circulation. An insulating plate is arranged between the coaxial mounting seat and the gun head to prevent electrical conduction.

[0025] The upper air blowing assembly includes an air knife bracket, a double air knife and an upper air pipe joint, the air knife bracket is connected to the gun head, the double air knife is mounted on the air knife bracket, the upper air pipe joint is connected to the double air knife, the double air knife has two air outlets, the side wall of the scale tube is provided with an open slot, and the air outlets correspond to the open slots. The two air outlets of the double air knife are arranged up and down. The lower air blowing assembly includes a lower air pipe joint, the side wall of the air nozzle is provided with an air inlet, and the lower air pipe joint is connected to the air inlet of the air nozzle.

[0026] During the specific assembly: install the air guide ring 2 into the gun head 1, install the insulating plate 3 and the coaxial mounting seat 4 into the gun head 1 in turn, and lock them with screws; insert the holder 5 into the coaxial mounting seat 4, insert the calibrated tube 12 into the locking sleeve 6, and then use the internal thread of the locking sleeve 6 and the external thread of the coaxial mounting seat 4 to lock them. Before locking, pay attention to the direction of the opening groove of the calibrated tube and adjust it to the 0 size of the calibrated tube. Install the air nozzle 11 into the calibrated tube 12, and install the lower air pipe joint 10 on the side of the air nozzle 11; the wind knife bracket 7 is installed on the coaxial mounting seat 4 and locked with screws, the double air knife component 8 is installed on the wind knife bracket 7 with screws, and the upper air pipe joint 9 is installed on the side of the double air knife component 8. The upper air pipe joint 9 and the lower air pipe joint 10 are respectively connected to the external air pipe to realize gas supply. Three air flow paths: one is a coaxial blowing device, and the air flow is set inside the gun, so that the air flow converges to the center of the protective lens and then blows out from the air nozzle, so as to achieve the effect of dust removal and cooling the lens; the second is a double air knife blowing device connected in parallel, which prevents and blocks the welding slag from flying from the inner cavity to the protective lens from the bottom to the top during welding, so as to extend the life of the protective lens; the third is to connect the air pipe to the side of the copper nozzle, so that the air flow is blown downward from the inner cavity of the copper nozzle, which can ensure that the inert air flow is always aimed at the weld position, and has a good anti-oxidation and burning effect.

[0027] A method for extending the service life of a protective lens of a laser welding machine comprises the following steps:

[0028] The laser is emitted from the gun head and out of the air nozzle to perform the welding operation;

[0029] Set up three-way air blowing, namely coaxial air blowing, upper side air blowing and positive side air blowing;

[0030] Coaxial blowing: gas is input from the gun head, and the gas is blown out from the gun head. The gas gathers on the protective lens from top to bottom and then blows out through the air nozzle, which has the effect of dust removal and cooling the protective lens;

[0031] Upper side blowing: Blow air directly toward the graduated tube, and blow air from the opening slot of the graduated tube. The upper side blowing is located below the protective lens to prevent the welding slag generated during welding from splashing upward onto the protective lens.

[0032] Blowing from the lower side: Blow the shielding gas into the gas nozzle, and the shielding gas will be blown downward from the gas nozzle to the welding position.

[0033] It should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A structure for extending the service life of a protective lens of a laser welding machine, characterized in that: It includes a gun head and an air nozzle, a protective lens is installed in the gun head, the gun head is connected to the coaxial air guide assembly, the air nozzle is connected to the coaxial air guide assembly, a coaxial gas channel is arranged in the gun head, the coaxial gas channel is connected to the coaxial air guide assembly, an air inlet is arranged on the gun head, an upper air blowing assembly and a lower air blowing assembly are arranged on the side of the coaxial air guide assembly, the upper air blowing assembly blows air horizontally toward the coaxial air guide assembly, and the lower air blowing assembly blows air toward the air nozzle.

2. The structure for extending the service life of the protective lens of a laser welding machine according to claim 1, characterized in that: The coaxial gas guide assembly includes a coaxial mounting seat, a clamping seat, a locking sleeve and a calibrated tube. The coaxial mounting seat is connected to the gun head, the locking sleeve is locked and installed with the coaxial mounting seat, the clamping seat passes through the locking sleeve and is connected to the coaxial mounting seat, the upper end of the calibrated tube extends into the locking sleeve and is installed and connected with the clamping seat, and the gas nozzle is connected to the calibrated tube.

3. The structure for extending the service life of the protective lens of a laser welding machine according to claim 2 is characterized in that: An air guide ring is arranged in the gun head, and the air guide ring faces the coaxial mounting seat.

4. The structure for extending the service life of the protective lens of a laser welding machine according to claim 3 is characterized in that: An insulating plate is arranged between the coaxial mounting seat and the gun head.

5. The structure for extending the service life of the protective lens of a laser welding machine according to claim 4, characterized in that: The upper air blowing assembly includes a wind knife bracket, a double wind knife component and an upper air pipe joint. The wind knife bracket is connected to the gun head, the double wind knife component is installed on the wind knife bracket, the air pipe joint is connected to the double wind knife component, the double wind knife component has two air outlets, and the side wall of the scale tube is provided with an open groove, and the air outlet corresponds to the open groove.

6. The structure for extending the service life of the protective lens of a laser welding machine according to claim 5, characterized in that: The two air outlets of the double-air blade are arranged up and down.

7. The structure for extending the service life of the protective lens of a laser welding machine according to claim 6, characterized in that: The lower air blowing assembly comprises a lower air pipe joint, and an air inlet hole is arranged on the side wall of the air nozzle, and the lower air pipe joint is connected with the air inlet hole of the air nozzle.

8. A method for extending the service life of a protective lens of a laser welding machine according to claim 7, characterized in that: The following steps are involved: The laser is emitted from the gun head and out of the air nozzle to perform the welding operation; Set up three-way air blowing, namely coaxial air blowing, upper side air blowing and positive side air blowing; Coaxial blowing: gas is input from the gun head, and the gas is blown out from the gun head. The gas gathers on the protective lens from top to bottom and then blows out through the air nozzle, which has the effect of dust removal and cooling the protective lens; Upper side blowing: Blow air directly toward the graduated tube, and blow air from the opening slot of the graduated tube. The upper side blowing is located below the protective lens to prevent the welding slag generated during welding from splashing upward onto the protective lens. Blowing from the lower side: Blow the shielding gas into the gas nozzle, and the shielding gas will be blown downward from the gas nozzle to the welding position.

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