Argon arc welding gun ceramic nozzle

Abstract

The application is a kind of argon arc welding gun ceramic nozzle, characterized by a tubular structure including three parts, a tubular ceramic nozzle thick section (41) in the upper part and a tubular ceramic nozzle thin section (43) in the lower part are connected by a circular truncated cone tubular ceramic nozzle middle section (42); wherein the diameter of the ceramic nozzle thick section (41) is greater than the diameter D of the ceramic nozzle thin section (43); the application can realize the requirement of inert gas protection for preventing oxidation of the welding joint of thick plate titanium alloy material in the form of deep U-shaped groove, and is particularly suitable for welding of easily oxidized materials with deep U-shaped groove.

Description

Technical Field

[0001] This invention relates to a ceramic nozzle for argon arc welding guns, particularly a ceramic nozzle for argon arc welding guns used for welding easily oxidized materials with deep U-shaped bevels. Background Technology

[0002] To ensure connection strength and reduce welding defects, a deep U-shaped bevel is used for the welding joint of a thick plate titanium alloy. Titanium alloy is an easily oxidized material. To prevent oxidation during the welding process, inert gas is required to fully protect the weld area. However, ordinary welding torch ceramic nozzles cannot meet the requirements for anti-oxidation inert gas protection of deep U-shaped bevel welding joints. Summary of the Invention

[0003] The purpose of this invention is to provide a ceramic nozzle for an argon arc welding gun that meets the requirements for oxidation-resistant inert gas protection for welded joints of thick titanium alloy materials with deep U-shaped bevels.

[0004] A ceramic nozzle for an argon arc welding gun is characterized by comprising a tubular structure of three parts, wherein the upper tubular ceramic nozzle coarse section 41 and the lower tubular ceramic nozzle fine section 43 are connected by a frustum-shaped tubular ceramic nozzle middle section 42; wherein the diameter of the ceramic nozzle coarse section 41 is larger than the diameter D of the ceramic nozzle fine section 43.

[0005] On the wall of the ceramic nozzle section 43, there are multiple rows of air holes 431. The diameter of each air hole 431 is A, the interval between adjacent horizontal rows or between two adjacent rows of air holes 431 is C, and the angle between the central axis of each air hole 431 and the upper outer wall is an obtuse angle B. Among them, the diameter of the air hole 431 is A = 0.08D to 0.4D, the obtuse angle is B = 140° to 160°, and the interval between two rows of air holes 431 is C = 0.2D to 0.8D.

[0006] The diameter of the air outlet 431 is A = 0.1D to 0.2D, the obtuse angle is B = 140° to 160°, and the interval distance between the two air outlets 431 is C = 0.3D to 0.4D.

[0007] The total length of the ceramic nozzle coarse section 41, ceramic nozzle middle section 42 and ceramic nozzle fine section 43 is L1, and the length of the ceramic nozzle fine section 43 is L2; ​​the range of L1 is: 50mm≤L1≤130mm; the range of L2 is: 40mm≤L2≤100mm, and L1-L2≥10mm; the diameter D of the ceramic nozzle fine section 43 is: 4mm≤D≤20mm.

[0008] This invention can meet the requirements of oxidation-resistant inert gas protection for welded joints of thick plate titanium alloy materials with deep U-groove, and is particularly suitable for welding easily oxidized materials with deep U-groove. Attached Figure Description

[0009] Figure 1 Cross-sectional view of ceramic nozzle

[0010] Figure 2 Diagram of ceramic nozzle usage

[0011] The markings in the diagram are as follows: 1 is the tungsten electrode cap, 2 is the welding torch, 3 is the switch, 4 is the ceramic nozzle, 5 is the tungsten electrode, 6 is the U-shaped bevel, 7 is the left workpiece, 8 is the right workpiece, 41 is the coarse section of the ceramic nozzle, 42 is the middle section of the ceramic nozzle, and 43 is the fine section of the ceramic nozzle. Detailed Implementation

[0012] like Figure 1 As shown, a ceramic nozzle for an argon arc welding torch is a cylindrical tube with a thicker end and a tapered transition in the middle. The thicker section has an internal thread structure and connects to the argon arc welding torch body. The outer diameter of the thinner section is D. Multiple rows of vent holes with a diameter of A are opened along the axial direction of the thinner section. The angle between the axis of the vent holes and the axis of the ceramic tube is B. The distance between each row of vent holes is C, where A = 0.1D, B = 140°~160°, and C = 0.4D. D, L1, and L2 can be adjusted appropriately according to different usage conditions.

[0013] When using, such as Figure 2 As shown, the tungsten electrode cap 1 and tungsten electrode 5 are installed on the welding torch 2, and a ceramic nozzle 4 of appropriate length L1 is installed on the welding torch 2, ensuring that the ceramic nozzle 4 can extend into the bottom of the U-shaped groove 6 formed by the left workpiece 7 and the right workpiece 8 to be welded. The switch 3 is turned on, so that the inert protective gas is discharged from the gas outlet on the ceramic nozzle 4 and the port of the ceramic nozzle 4 at the end of the tungsten electrode 5. The discharge flow rate of the inert protective gas is 20-30L / min, so as to realize the welding oxidation protection of the weld position during the welding process.

[0014] The above description is only an overview of the technical solution of this patent. In order to better understand the technical means of this patent, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this patent more obvious and easy to understand, it is described in detail with reference to the above-mentioned drawings.

Claims

1. An argon arc welding torch ceramic nozzle characterized by The tubular structure comprises three parts, a tubular ceramic nozzle thick section (41) in the upper part and a tubular ceramic nozzle thin section (43) in the lower part are connected by a circular truncated cone tubular ceramic nozzle middle section (42); wherein the diameter of the ceramic nozzle thick section (41) is larger than the diameter D of the ceramic nozzle thin section (43); On the wall of the ceramic nozzle thin section (43), there are multiple rows of air outlet holes (431), the diameter of each air outlet hole (431) is A, the interval distance between adjacent transverse rows or between adjacent two rows of air outlet holes (431) is C, and the angle between the central axis of each air outlet hole (431) and the upper outer wall is an obtuse angle B; wherein the diameter A of the air outlet hole (431) is 0.08D-0.4D, the obtuse angle B is 140°-160°, and the interval distance C between the two rows of air outlet holes (431) is 0.2D-0.8D.

2. An argon arc welding torch ceramic nozzle according to claim 1, characterized in that The diameter A of the air outlet hole (431) is 0.1D-0.2D, the obtuse angle B is 140°-160°, and the interval distance C between the two rows of air outlet holes (431) is 0.3D-0.4D.

3. An argon arc welder ceramic nozzle as defined in claim 1 wherein The total length of the ceramic nozzle thick section (41), the ceramic nozzle middle section (42) and the ceramic nozzle thin section (43) is L1, and the length of the ceramic nozzle thin section (43) is L2; the range of L1 is 50mm≤L1≤130mm; the range of L2 is 40mm≤L2≤100mm, and L1-L2≥10mm; the diameter D of the ceramic nozzle thin section (43) ranges from 4mm to 20mm.

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