JPH07276089A - Method for manufacturing wire for arc welding - Google Patents

Abstract

(57) [Summary] [Purpose] The surface of the arc welding wire does not have any flaws and can be drawn smoothly and with high efficiency. Even when using a long conduit cable and welding under high current welding conditions. An object of the present invention is to provide a method of manufacturing a wire for arc welding having a good wire feeding property. [Composition] In the manufacturing process of arc welding wire, 1 of ester or animal and vegetable oil consisting of fatty acid and alcohol
Wire drawing using a lubricant in which one or more kinds of one or two kinds and one or more kinds of inorganic or anhydrous lubricants are mixed, and then cleaning adjustment of the lubricant adhered by the wire drawing with a water-soluble lubricant It is characterized by doing. In addition, the lubricant used for wire drawing is one of ester consisting of fatty acid and alcohol or animal and vegetable oil.
It is characterized in that it is a lubricant obtained by mixing 45 to 55% of one or two or more inorganic or anhydrous lubricants in one or two kinds. Further, it is characterized in that the lubricant adhered with a water-soluble lubricant is washed and adjusted to 50 to 500 mg per 10 kg of the wire.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an arc welding wire, and more particularly to a method for manufacturing an arc welding wire having excellent wire drawability and excellent feedability during use (during welding). Is.

[0002]

2. Description of the Related Art For gas shielded arc welding 0.8-2.
The most common method for producing 0 mm thin wire is to draw the wire after wire filling or flux filling to a diameter of 2 to 4 mm with a roller or hole die, annealing process, pickling process, plating process, and final process. This is a method in which the step of drawing with a hole die to the size diameter is sequentially performed by selecting it according to the shape and physical properties of the product. The step of wire drawing to the final size diameter is generally carried out by wet wire drawing with a smooth surface and good color tone. However, since a water-soluble lubricant is generally used in wet wire drawing, the wire surface film is thin when passing through the die and the wire's slipperiness is somewhat poor, so scratches are likely to occur on the wire surface and the surface reduction rate per die cannot be increased. However, since it is necessary to use a lot of dice, there is a problem in terms of efficiency.

On the other hand, in dry drawing, the surface reduction rate can be increased by using metal soap or the like as a lubricant, but a lubricant removal treatment (eg, baking treatment) is required after the wire drawing. Inorganic or anhydrous lubricants that do not require baking treatment have a problem in that it is difficult to apply the lubricant evenly to the wire surface, causing flaws on the wire surface. In addition, these arc welding wires are becoming more automated and more efficient, and the welding conditions at higher currents are being adopted. As a result, the wire feeding speed is necessarily high. Become. In addition, depending on the target structure, welding is often performed in narrow spaces, and from the viewpoint of ease of use at these locations, the conduit cable from the feed roller of the wire feeder of the welder to the welding torch is used. Tends to be bent and used.

When the conduit cable is bent and used in this manner, the friction resistance increases when the wire passes through the conduit tube in the conduit cable, which hinders the feeding of the wire during welding and causes an unstable arc. As a result, the problem that welding becomes impossible occurs. Conventionally, for the problems of wire drawability at the time of manufacturing these arc welding wires and feedability at the time of welding, for example, JP-B-58-4639.
JP-A-5-237, which discloses a method of wet drawing a higher fatty acid and an alkali metal salt of a higher fatty acid with a lubricant diluted with a volatile solvent and applying an appropriate amount of the lubricant to the wire surface.
31 discloses polytetrafluoroethylene, molybdenum disulfide,
Various methods have been proposed, such as wire drawing with a lubricant made of graphite or the like and a method of applying the lubricant.

However, even in these methods, as described above, the work efficiency is poor in wet drawing, and in dry drawing, a baking treatment is required and it is difficult to evenly apply a lubricant to the wire surface. There may be scratches on the surface. In addition, the improvement of the wire feedability when using a long conduit cable at the time of welding and welding under high current welding conditions is still insufficient at present.

[0006]

SUMMARY OF THE INVENTION Therefore, according to the present invention, a baking process is not necessary, a flaw is not generated on the wire surface, smooth wire can be drawn with high efficiency, and a long conduit cable is used for high current welding. It is an object of the present invention to provide a method for manufacturing an arc welding wire that has good feedability even when welding under conditions.

[0007]

In order to achieve the above-mentioned object, the inventors of the present invention have studied various wire manufacturing methods, and as a result, in the above-mentioned step, ester or animal / vegetable oil was used in the wire drawing step up to the final size diameter. Wire drawing with a lubricant mixed with an inorganic or anhydrous lubricant and then adjusting the amount of lubricant adhered by wire drawing with a water-soluble lubricant by cleaning the wire surface without baking It has been found that the wire can be drawn smoothly and efficiently without causing flaws, and that even when welding is performed under high current welding conditions using a long conduit cable, the feedability is extremely good. is there.

That is, the gist of the present invention is to
In the manufacturing process of arc welding wire, one or two of ester or animal and vegetable oil consisting of fatty acid and alcohol
Wire drawing using a lubricant prepared by mixing one or more kinds of seeds and inorganic or anhydrous lubricants, and then cleaning and adjusting the lubricant adhered by the wire drawing with a water-soluble lubricant. It is a method for producing a characteristic arc welding wire.

As the lubricant used for wire drawing, 45 to 55% of one or two kinds of ester or animal or vegetable oil consisting of fatty acid and alcohol and one or more kinds of inorganic or anhydrous lubricant are mixed. It is characterized by being a lubricant. Furthermore, the lubricant adhered with a water-soluble lubricant is used for the wire 1
It is characterized by a washing adjustment to 50 to 500 mg per 0 kg. The arc welding wire referred to in the present invention is Si-M.
The target is a steel wire containing n-type, Mo, Ti, Al, etc. and a flux-cored wire containing various fluxes, alloys and deoxidizers. Wire diameter is 0.8-2.0mm
Is.

[0010]

[Effect] The lubricant is made uniform by drawing with a lubricant prepared by mixing one or two kinds of ester or animal or vegetable oil consisting of fatty acid and alcohol and one or more kinds of inorganic substance or anhydrous lubricant. In addition, even if the area reduction rate during wire drawing is increased, the wire surface does not become smooth and does not occur. Also, since a large amount of the lubricant that adheres during wire drawing is cleaned and adjusted with a water-soluble lubricant, an appropriate amount of lubricant adheres evenly to the wire surface during welding, and the conduit cable is long and high current welding is performed. Even under the conditions, the wire feedability is good and the arc is stable. The fatty acids referred to in the present invention are animal and plant fatty acids, and the animal and vegetable oils are lard, sheep oil, liver oil, palm oil, rapeseed oil, olive oil and the like.

The lubricant mixed with the ester of fatty acid and alcohol or the animal or vegetable oil is an inorganic or anhydrous lubricant. An organic lubricant requires baking treatment. Inorganic or anhydrous lubricants
Any lubricant containing an appropriate amount of a lubricant such as ethylene tetrafluoride, molybdenum disulfide, and graphite, which is generally used in dry wire drawing, which improves wire drawability and wire feedability during welding, may be used. A preferred mixture of one or more inorganic or anhydrous lubricants mixed with one or two of esters or animal and vegetable oils consisting of fatty acids and alcohols is 45 to 5
5%.

If the content of one or more of the inorganic or anhydrous lubricants is less than 45%, the amount of the inorganic or anhydrous lubricant adhered to the wire surface is small and a flaw is generated on the wire surface during wire drawing. . On the other hand, if one or more of the inorganic or anhydrous lubricant exceeds 55%, the ester or animal or vegetable oil consisting of fatty acid and alcohol will not be uniformly mixed with the inorganic or anhydrous lubricant, and the wire surface On the surface of the wire during wire drawing, and the wire feedability during welding becomes poor.

The step of wire drawing using a lubricant prepared by mixing an ester consisting of fatty acids and alcohols or animal and vegetable oils with inorganic substances or anhydrous lubricants is carried out after the plating treatment or, if no plating treatment is carried out, after the annealing or the wire diameter. When the thickness is 4.0 mm or less, the lubricant is uniformly attached, and thus the wire drawability becomes good. Further, even if wet drawing is performed after the drawing, the wire can be drawn while the lubricant is still adhered, and therefore the wire drawability and the wire feeding property during welding are good. The die used for wire drawing is preferably a rotary die because the lubricant adheres more uniformly thereto.

The water-soluble lubricant used is a mixture of water with an appropriate amount of potassium soap, fluororesin, boric acid, polyether polyol, and the like. Water-soluble lubricant is 600mg in wire drawing
A part of the above-mentioned ester or animal / vegetable oil inorganic or anhydrous lubricant adhered in large amounts is washed off and left on the wire surface in an appropriate amount and uniformly to improve the wire feeding property during welding. The amount of lubricant to be left is preferably adjusted to 50 to 500 mg / 10 kg of wire, 50 mg / wire 1
If it is less than 0 kg, the wire feedability during welding will be poor and 50
If the amount exceeds 0 mg / 10 kg of wire, lubricant will accumulate on the tip, causing arc breakage and tip clogging.

An example of the cleaning method using the water-soluble lubricant is shown in FIG. In the figure, 3 is a water-soluble lubricant, 1 is a nozzle for ejecting the lubricant, 2 is a valve for adjusting the ejection pressure, P
Is a pump for circulating the water-soluble lubricant. The amount of the lubricant adhered to the surface of the wire 5 by wire drawing is adjusted by the number of nozzles 1 and the jet pressure with the water-soluble lubricant 3 ejected from the nozzle 1, and the water adhered by the friction heat of the skin path wire 4 is adsorbed. Are removed.

[0016]

[Example] YGW11 specified in JIS G3312
Solid wire, Y specified in JIS G3313
FW24 seamless flux-cored wire (flux filling rate 14%) is drawn and plated into two diameters of 2.6 mm and 3.0 mm. Each 1000 kg was drawn by the method and passed through a skin pass, and the wire drawability at that time was examined and a spooled wire was obtained. In addition, adjustment of the wire surface residual amount of ester or animal and vegetable oil and inorganic or anhydrous lubricant,
The number of nozzles (2 to 4) for ejecting the water-soluble lubricant and the strength of the pressure were used to remove the adhered water by frictional heat of skin pass wire drawing.

The wire feedability was examined using the apparatus shown in FIG. That is, for the purpose of increasing the feeding resistance, a test wire pulled out from a spool 7 is fed by a feeding motor 8 to a 6 m conduit cable 6 provided with two loops of 200 mm in diameter, fed to a torch 9, and each wire is fed. Welded 10 kg. The welding conditions at that time are as follows. Welding current: 300 A Welding voltage: 28-30 V Welding speed: 30 cm / min Shielding gas: CO ₂ 20 liters / min Welding method: Bead on plate

The wire feedability was examined by measuring the armature current of the feed motor 8. The wire feedability becomes defective when the armature current exceeds 3.5 A, and the arc becomes unstable. The results are shown in Table 1.

[0019]

[Table 1]

[0020]

[Table 2]

In Table 1, No. 1 to 5 are production examples of the wire for arc welding according to the present invention, No. 6 to 10 are comparative examples. No. according to the present invention. 1, 3 and No. No. 4 is drawn with a lubricant prepared by mixing an ester or animal or vegetable oil with an inorganic or anhydrous lubricant in an appropriate amount, and then washed and adjusted with a water-soluble lubricant to remove the lubricant attached by the wire drawing. Sometimes the surface was flawless and good, the armature current of the feed motor was low even during welding, and the arc was stable, which was a very satisfactory result. No. No. 2 has a slightly large amount of inorganic or anhydrous lubricant, and No. In No. 5, since the mixing amount of the inorganic substance or anhydrous lubricant was slightly small, the arc became a little unstable during welding, but the others were good results.

In the comparative example, No. In No. 6, since no inorganic substance or anhydrous lubricant was mixed, wet drawing was performed with ester and palm oil, and since the number of dies was small, many flaws were generated on the wire surface. Therefore, welding was stopped. No.
Since No. 7 contained no ester or animal or vegetable oil, the inorganic substance or anhydrous lubricant did not uniformly adhere to the wire surface, and a flaw was generated on the wire surface during wire drawing. In addition, the lubricant did not remain uniformly on the wire surface even after cleaning with the water-soluble lubricant, and the armature current of the feed motor during welding was high and the arc became unstable.

No. In No. 8, since the amount of the inorganic or anhydrous lubricant mixed was small, the amount of the lubricant adhered to the wire surface during wire drawing was small, and the wire surface was flawed during wire drawing. In addition, since the residual lubricant was reduced by adjusting with a water-soluble lubricant, the armature current of the feed motor during welding was high and the arc was unstable. No. In the case of No. 9, a large amount of inorganic or anhydrous lubricant was mixed, so that it could be uniformly mixed with palm oil, and the amount of adhesion to the wire surface was non-uniform during wire drawing, causing flaws on the wire surface. Further, the residual lubricant could not be adjusted with the water-soluble lubricant, and the armature current of the feed motor during welding was high and the arc was unstable. No. No. 10 is a water-soluble lubricant, which does not adjust the amount of residual lubricant by cleaning the lubricant attached during wire drawing in the previous process, so the amount of residual lubricant is large and the chip accumulates lubricant, causing arc breakage. And chip clogging also occurred.

[0024]

EFFECTS OF THE INVENTION According to the method for manufacturing an arc welding wire of the present invention, it is possible to smoothly and highly efficiently draw a wire without causing flaws on the wire surface, and to leave the lubricant on the wire surface in an appropriate amount and uniformly. Since it is possible to use a long conduit cable and good feedability can be obtained even when welding with high current, it greatly contributes to the productivity of arc welding wire and the improvement of welding efficiency. is there.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example of an apparatus for cleaning a lubricant adhered by wire drawing in a previous step with a water-soluble lubricant of the present invention.

FIG. 2 is an explanatory view showing a welding device used in an embodiment of the present invention.

[Explanation of symbols]

 1 Nozzle 2 Valve 3 Water-soluble lubricant 4 Skin path wire drawing 5 Wire 6 Conduit cable 7 Spool 8 Feed motor 9 Torch P Pump

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication C10M 105: 32 101: 04 125: 22 131: 04 125: 02) C10N 10:12 40:32 ( 72) Inventor Kazutaka Kurahashi 7-6-1 Higashi Narashino, Narashino City, Chiba Narashino Factory of Nittetsu Welding Co., Ltd.

Claims (3)

[Claims] 1. A process for producing a wire for arc welding, wherein one or two esters or animal or vegetable oils consisting of fatty acids and alcohols and one of inorganic or anhydrous lubricants are used.
Wire drawing using a lubricant that is a mixture of two or more kinds,
Next, a method for producing an arc welding wire, which comprises cleaning and adjusting a lubricant adhered by wire drawing with a water-soluble lubricant. 2. The lubricant used for wire drawing is a mixture of one or two kinds of esters or animal and vegetable oils composed of fatty acids and alcohols, and one or more kinds of inorganic or anhydrous lubricants in an amount of 45 to 55%. The method for manufacturing an arc welding wire according to claim 1, wherein the method is a lubricant. 3. The method for producing an arc welding wire according to claim 1 or 2, wherein the lubricant adhered with a water-soluble lubricant is washed and adjusted to 50 to 500 mg per 10 kg of the wire.