JPS59193772A - Anti-sticking agent for spatter - Google Patents

Abstract

PURPOSE:To prevent stably spatters from sticking on a nozzle for welding under a welding condition of high current by coating an anti-sticking agent for spatter consisting essentially of molybdenum disulfide on the mouth part of the nozzle in the stage of electric welding. CONSTITUTION:An anti-sticking agent for spatter to be provided by coating or spraying on the mouth part of a nozzle for welding is constituted essentially of molybdenum disulfide. The molybdenum disulfide of both dry and paste types are equally effective.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention prevents spatter generated during electric welding from reaching the nozzle.
This invention relates to a sputter adhesion prevention agent that prevents M.

Conventionally, this type of spatter adhesion prevention agent has been silicon-based, and the spatter adhesion prevention agent is sprayed onto the welding nozzle (
Although this spatter adhesion prevention agent is effective to some extent, it does not cause any inconvenience under low current conditions when used in carbon gas welding nozzles, but when used in high current There is no effect at all under the value condition. For example, current: 180A, voltage: 22V, shield gas: CO21
When welding the entire circumference of a diameter 750 mm with fillet fillet at 80 minutes and Air 8 Z/minute, if welded the entire circumference continuously for 79 minutes and 15 seconds per revolution, the nozzle (1 )
As shown in FIG.

Spacks adhering to the periphery of the gas outlet (3) for the shielding gas of the nozzle (1) can be easily removed by the action of a silicone-based spatter adhesion inhibitor when welding lengths of the above-mentioned extent. If the welding length exceeds 2 or more, the shielding gas outlet (3) will be blocked by the spackle (2), resulting in poor welding.

Third, by protecting the nozzle that is placed under high temperature conditions with a base material that has excellent heat resistance, it is possible to obtain a sufficient effect of preventing NI adhesion even under high current welding conditions. The task is to make it happen.

The technical means of the present invention for solving the above problems is to use molybdenum disulfide as the main ingredient.

According to the above technical means of the present invention, the lubricating activity of molybdenum disulfide prevents the adhesion of soot to the nozzle, but its heat resistance is about 450'C, which is higher than that of silicon, etc. Moreover, its lubricating activity is stable under high temperature conditions, and its anti-adhesion effect is stable even under high current welding conditions.

This effect is shown in the drawings. If the nozzle is in the state shown in Fig. 1 before use, and the entire fillet weld is made for one circumference with a diameter of 750 mm under the same conditions as described above, the nozzle will be in the state shown in Fig. 3. It has been kept in a good condition, and there is hardly any snow or dirt attached to it.

Further, when two layers were fillet welded continuously, the adhesion of spatter was only as shown in Fig. 4, and there was no adhesion of slits or ivy that would cause a change in welding performance.

As described above, according to the above-mentioned configuration of this month, the adhesion of sock and debris is extremely reduced compared to the conventional one, and continuous welding for a long time is possible. In particular, the welding work is done by Robo-7.
This effect is particularly significant in today's welding practices, which tend to be more automated and automated. In other words, automation of welding can be further promoted.

Next, to explain in more detail about the molybdenum disulfide used in this ffil=M, there are two types of molybdenum disulfide, a dry type and a paste type, and almost the same effect was obtained with both.

In particular, the dry type has a remarkable effect when applied inside the nozzle, and because it is non-sticky, there is very little residual residue that sticks to the inside.

The paste quiz has the characteristic that the amount of spack adhesion is extremely small in the initial stage.On the other hand, with the dry type, even if there is a certain amount of spack adhesion in the initial stage (=tM), there is no further increase in the amount of spack adhesion. They have the characteristic of being difficult to form. Both have the effect of suppressing the adhesion of snow over a long period of time. All of these results were obtained through experiments. This experiment was carried out using the present invention, and the results also demonstrate the remarkableness of the effects of the present invention.

The effect of the anti-spack agent is more pronounced as the coating thickness increases, but in order to increase the coating thickness, the tip of the nozzle (1) must be connected to the gas outlet as shown in Figure 5. (
3) It is effective to make the end face of the peripheral wall uneven to increase the surface area of that part.

Furthermore, in the paste quiz, nozzle (1
) It is more effective to carve vertical grooves f4), t4] on either or both of the inner and outer walls of the gas outlet (3), and even if the molybdenum disulfide layer peels off and disappears, the Molybdenum disulfide is replenished from the vertical groove, and the effect of preventing spatter adhesion can be obtained for a longer period of time. This method of forming vertical grooves is also useful in the case of other liquid spack adhesion inhibitors, and it is also possible to provide a storage section for the inhibitor near the nozzle and continuously replenish the vertical grooves from there.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an unused nozzle, Fig. 2 is a perspective view of a conventional nozzle with spatter adhering to it, and Figs. Figure 5 is a perspective view of the nozzle improvement plan after use when an inhibitor is used.
... Spatter (3) ... Gas outlet agent Patent attorney Yoshihiro Sakagami Figure 3 Figure 1 Yu 2 Figure 443-

Claims (1)

[Claims] Spack 44 anti-adhesive agent whose main ingredient is molybdenum disulfide, which is applied or sprayed onto the mouth of a welding nozzle to prevent the adhesion of spatter generated during welding.