JPH0641973U - Gas welding nozzle - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a nozzle for gas welding, which can prevent spatter from depositing on a cylinder tip and can be used for a long period of time. [Structure] The tip of the cylindrical nozzle body 1 is tapered to a tapered portion 3
Formed on.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a gas welding nozzle capable of performing high-quality gas welding for a long period of time by preventing spatter deposited and deposited on the surface from falling into the welding surface.

[0002]

[Prior art]

 The cylindrical gas welding nozzle that is generally used for gas welding, the spatter generated during welding is deposited on the surface of the nozzle body, and after about 1 week of use, the inside of the nozzle begins to become blocked and the gas is supplied smoothly. There was a drawback that you wouldn't let go. Therefore, a nozzle for gas welding has been developed in which a special plating layer is formed on the surface of the nozzle body to make it difficult for spatter to adhere to the surface.

However, no matter what kind of surface treatment is applied to the cylindrical nozzle body, it is unavoidable that spatter is deposited and deposited on the surface, but spatter is deposited on the tip of the cylinder. However, there is a problem in that the deposited and deposited spatter suddenly drops into the welding surface to generate bubbles and irregularities, which may lead to poor quality such as poor appearance or poor welding.

[0004]

[Problems to be solved by the device]

 The present invention solves the above-mentioned conventional problems so that spatter is less likely to be welded to the tip of the nozzle body, and even if the welded spatter falls into the welding surface, there is a deterioration in quality such as poor appearance and poor welding. It was completed for the purpose of providing a nozzle for gas welding that does not generate gas.

[0005]

[Means for Solving the Problems]

 The gas welding nozzle of the present invention made to solve the above-mentioned problems is characterized in that the tip of the cylindrical nozzle body is formed in a tapered portion.

[0006]

【Example】

 The present invention will now be described in detail with reference to the illustrated embodiment. In the figure, 1 is a cylindrical nozzle body made of chrome copper alloy, and 2 is a part or front part of the inner surface and outer surface of the nozzle body so that the spatter generated during welding does not easily adhere to the surface of the nozzle body. The formed electroless plating layer is an electroless plating layer containing lead and zirconium which is particularly excellent in performance in the examples. In order to form such an electroless plating layer 2 containing lead and zirconium, first, the nodule body 1 made of a chromium copper alloy is pretreated with a pretreatment solution containing sulfuric acid as a main component, A method of immersing in an electroless plating solution containing zirconium acetate, sodium hyposulfite, sodium thiosulfate, and lead acetate can be adopted. In the composition of this electroless plating solution, zirconium acetate and lead acetate are basic components for depositing the electroless plating layer 2 containing lead and zirconium. Sodium hyposulfite is a component for activating the reaction, and sodium thiosulfate is a component for improving the compatibility of lead and zirconium. However, it goes without saying that the composition of the electroless plating solution is not limited to this.

Such a non-magnetic electroless plating layer 2 containing lead and zirconium may have a thickness of, for example, about 10 to 15 μm, and even inside the nozzle body 1 made of a chromium-copper alloy. It adheres firmly in a diffused state, and there is no risk of peeling during use. Lead in the electroless plating layer 2 has a role of improving the lubricity of the surface, and zirconium has a role of supplementing the high temperature hardness which is insufficient with lead alone.

Further, a tapered taper portion 3 whose end edge is thinner than the wall thickness of the nozzle body 1 is formed at the tip of the cylinder of the nozzle body 1. This was because it was found that spatter generated during welding was most likely to adhere to the edge portion of the nozzle body 1, so that the area of the edge portion was made as small as possible. If the thickness of the main body 1 is equal to the thickness of the body 1, when spatter that is deposited and deposited little by little suddenly drops into the welding surface, the volume of the spatter is small and bubbles or irregularities are generated, resulting in poor appearance or poor welding quality This is to effectively prevent the occurrence of. The reason why the spatter that drops into the welding surface does not generate bubbles or unevenness is that the volume is so small that it is completely melted by the high-temperature welding gas and evenly melts into the welding surface. is there.

As shown in FIG. 2, it is necessary to process such a tapered end taper portion 3 of the tube end so that the thickness (d) at the tip end portion is 2 mm or less, preferably about 1 mm. Besides being formed on the outside of the nozzle body 1 as in the example, it may be formed on the inside as shown in FIG. The nozzle body 1 shown in this embodiment is made of metallic copper which is excellent in workability and strength unlike ceramics and the like, and thus the surface of the cylindrical nozzle body 1 does not contain lead and zirconium. In the case where the electroplated layer 2 is formed, not only the welding of spatters is significantly reduced, but also when the precise tapered taper portion 3 as described above is formed, the tube tip is less likely to be damaged and is not damaged during use. It is particularly preferable because it is easy to handle during use and has durability.

[0010]

[Action]

 The structure of the nozzle body 1 is the same as that of the conventional gas welding nozzle of this kind in that the gas welding tip is mounted inside and the gas welding is performed according to the usual method. Since the tapered taper 3 is formed on the tip of the cylinder, welding of the spatter on the tip of the cylinder is prevented as much as possible, and even if spatter is slightly welded and drops into the welding surface, it is small in volume. It does not cause quality deterioration such as poor appearance or poor welding. Such a gas welding nozzle of the present invention has almost no welding of spatter, and even if spatter deposited on the cylinder tip falls into the welding surface, it does not deteriorate the quality of welding and can be used for cleaning treatment. It was proved that it could be used continuously for more than 6 months without maintenance, and the excellent effect of the present invention was confirmed.

[0011]

[Effect of device]

 As is clear from the above description, the present invention prevents spatters from depositing and depositing on the tip of the nozzle body as much as possible, and even if the spatters that have deposited fall into the welding surface, there is a poor appearance and welding defects. It is possible to carry out stable gas welding for a long period of time without causing the deterioration of the quality. Therefore, the present invention eliminates the conventional problems, and has an extremely great practical value in combination with the advantage that the structure is simple and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a main part in the embodiment of the present invention.

FIG. 3 is an enlarged cross-sectional view of a main part in another embodiment of the present invention.

[Explanation of symbols]

 1 Nozzle body 2 Electroless plating layer 3 Tapered taper surface

Claims (2)

[Scope of utility model registration request] 1. A nozzle for gas welding, characterized in that a cylindrical tip of a cylindrical nozzle body (1) is formed in a tapered portion (3). 2. The cylindrical nozzle body (1) is formed by forming an electroless plating layer (2) containing lead and zirconium on the surface of the cylindrical nozzle body (1) made of copper. The described gas welding nozzle.