JPH0445434B2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention prevents pressure flaws and handling flaws that occur in the wire rods when hot-rolled wire rods are conveyed in concentric coils and bundled with a binding machine. The present invention relates to a wire rod lubrication device that is prevented by lubrication treatment.

(Prior art) Hot rolled wire rods are usually manufactured using wire rod diameters of 5.5 to 18 mm.
Wire rods up to about mmφ are coiled in a laying head, and the non-concentric wire rings are continuously placed on a conveyor and cooled, then converged into concentric coils in a converging tab, and then transported to a binding machine by a hanger hook. be done. Also, the wire diameter is 19~55mmφ
The wire rods in the range are immediately wound into concentric coils using a polling winding machine, cooled using blast equipment, etc., and then conveyed to a tying machine using hanger hooks. Then, wrap the hoop and tie it with a binding machine.

During the above-mentioned binding, the contact surfaces between the wires are pressed against each other, causing pressure flaws, which remain on the product as surface flaws, and these flaws may be the starting point for problems such as breakage. In addition, due to the increase in the unit weight of coils and the size expansion of wire rods toward smaller diameters in order to improve yields, the height of the coils in binding machines has increased, making charging into existing heat treatment furnaces difficult due to the height of the furnace. There were problems such as not being able to charge the product, not being able to fit it into the customer's supply stand, and even not being able to fit it into the pickling tank.

As a countermeasure against this problem, there is a method for bundling hot rolled materials disclosed in Japanese Patent Application Laid-Open No. 151115/1983. In this method, a lubricant is applied to the rolled wire rod during the cooling transportation process or during bundling, and the wire is compressed and bundled.

(Problems to be Solved by the Invention) However, the technique disclosed in Japanese Unexamined Patent Publication No. 151115/1982 has not completely solved the above problems. The reason for this is that there is no way to efficiently and uniformly lubricate concentric tight coil wire rods.

In other words, the most popular lubrication method at present is the air atomization spray method, but since the spray cannot penetrate inside the tightly coiled wire, the area that can be lubricated is limited to the surface layer of the coil. . Furthermore, since the sprayed fume is scattered around, equipment such as an exhaust system is also required. Other methods include immersion in an aqueous solution containing a lubricant and treatment by showering. However, although these methods allow the lubricant to penetrate into the coil, the lubricant flows down and concentrates at the lower end of the coil. As a result, the lubrication thickness of the wire at the lower end of the coil becomes thicker, and the aqueous solution that adheres and stays inside the coil does not drain easily, causing water to drip down to the downstream process and making it difficult to dry. There are problems that degrade the environment.
This means that the amount of lubricant taken out by the coil increases, and even if it is partially recovered and used, filters, circulation pumps, pits to collect the aqueous solution dripping down, etc. are required, and the equipment as a whole is There is a problem of increasing size.

(Means for Solving the Problems) The wire rod lubrication device of the first invention is a device that supplies lubricant to the wire rod coils to lubricate between the rings of the wire rod coils before bundling the wire rod coils. a foamer in which foam injection nozzles are arranged along the axial direction of the wire coil, a cover that holds the injected foam between the foamer and the peripheral surface of the wire coil, and an aqueous solution containing a lubricant supplied to the foamer. and a device for supplying compressed air to the foamer.
Although the cover is mainly placed on the outside of the wire coil, it may be placed on the inside or on both the inside and outside sides. The cover placed on the outside is preferably made of a flexible material such as a vinyl sheet, rubber, or soft plastic so that the end of the cover is in close contact with the outer peripheral surface of the wire coil. Additionally, the cover may be fixedly attached to the foamer or may be removably attached.

In the wire lubricating device of the first invention, the foamer does not move, but in the device of the second invention, the foamer moves. That is, the foamer includes a plurality of foam injection nozzles arranged along the axial direction of the wire coil, and is movable along the circumferential surface of the wire coil. A brush is attached to the foamer so as to sweep the circumferential surface of the wire coil. In order to uniformly supply foam containing lubricant to the wire coil, the brush is preferably made of relatively soft plastic such as nylon. Moreover, it is equipped with a drive device that moves the foamer along the circumferential surface of the wire coil. As the drive device, an electric motor, an air motor, a hydraulic motor, etc. are used in combination with a reduction gear as appropriate. The foamer may be formed into a cylindrical shape extending along the axial direction of the wire coil, and supported rotatably around the cylindrical axis, and the brushes may be planted all over the outer periphery of the foamer.

In the first and second inventions described above, there may be one or more foamers.

The aqueous solution containing the lubricant used here is made from surfactants and water-soluble polymers. If the surfactant itself has lubricating properties, it can be foamed without adding a separate foaming agent. When the lubricant does not have foaming properties, a surfactant or a water-soluble polymer is added as a foaming agent. In addition, in situations where the temperature of the wire is high and the foam disappears quickly, it is possible to stably supply the foam for lubrication by adding a small amount of higher alcohol to the alkyl sulfate salt. can.

When a surfactant is used as a foaming agent, the surfactant adsorbs on the surface of gas and liquid, lowering the surface tension and increasing the surface viscosity, which improves the foaming properties during foam formation.
The size, uniformity, and stability of the bubble diameter are improved. Furthermore, when water-soluble polymers are used, they mainly improve the surface viscosity or surface viscoelasticity of the gas-liquid surface and form stable bubbles. In this way, when a surfactant or a water-soluble polymer is used as a foaming agent, the foam produced becomes uniform and stabilized.

The surfactant herein refers to a water-soluble organic compound that adsorbs onto the surface of gas and liquid to reduce surface activity. For example, sulfates (higher alcohol sulfate ester salts, etc.), anionic activators (fatty alcohol phosphate ester salts, etc.), cationic activators (aliphatic amine salts, etc.), nonionic activators (polyoxyethylene alkyl ethers, etc.) ), amphoteric active agents (alkyl betaines and others), etc., but are not limited thereto.

For foam generation, use one type or a mixture of two or more of these surfactants in water at a concentration of 0.001 to 40%.
It is preferable to add and use it so that

Water-soluble polymers include natural, synthetic, and semi-synthetic water-soluble polymers, such as cornstarch, starches, viscose, methylcellulose, ethylcellulose, polyacrylamide, polyacrylic acid, polyvinylpyrrolidone, polymaleic acid copolymer, and polyethyleneimine. , saponin and the like are listed as main examples, but the present invention is not limited thereto.

Regarding foam generation, one of these water-soluble polymers
It is desirable to add one or more species to water in an amount of 0.01 to 30%.

The above-mentioned surfactant and water-soluble polymer may be mixed and used in any proportion. Further, in order to improve the properties and stability of the foam, an appropriate amount of a chelating agent, builder, higher alcohol, etc. may be added to the aqueous surfactant solution or the mixture of the surfactant and water-soluble polymer.

Examples of chelating agents include aminocarboxylic acetic acids such as dihydroxyethylglycine and hydroxyethyliminodiacetic acid, oxycarboxylic acids such as sodium citrate and sodium glyconate, polycarboxylic acids, phosphonic acids such as hydroxyethane diphosphonic acid, or tribolyline. There are condensed phosphates such as acid soda and sodium pyrophosphate, and it is preferable to use one or more of them in an amount of 0.001 to 20%.
The higher alcohol is preferably a primary or secondary alcohol having 6 to 36 carbon atoms, such as hexanol, octanol, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, oleyl alcohol, or 18, 24, or 36 carbon atoms.
One or more types of Guerbet alcohols may be added in an amount of 0.5 to 30% based on the surfactant. As a builder, for example, sodium silicate, sodium sulfate,
Sodium carbonate or the like may be added in an amount of 0.1 to 30% to the above formulation.

In general, the thinner the wire diameter and the higher the packing density, the more difficult it is to lubricate the inside of the coil, but lubrication can be easily achieved by increasing the amount of water in the foam containing the lubricant and increasing the fluidity of the foam. . Conversely, the larger the diameter of the wire and the lower the packing density, the easier it is for the foam applied to the coil to drip from the lower end of the coil, so the amount of water in the foam is reduced and the amount of supply is also lowered for lubrication.

Note that it is possible to form foam using only mechanical force such as forced stirring without using any of these foaming agents, but the foam formed in this way has high surface energy and low surface viscosity, so the foam does not form easily. uniform,
Poor stability. For this reason, the lubrication conditions for the wire rod are not constant, resulting in lot runout and quality fluctuations, making it difficult to stably produce steel materials of the desired quality.

(Function) The wire lubrication device of the present invention is used as a device that supplies lubricant to the wire coil to lubricate between the rings of the wire coil before bundling the wire coil. Foam containing lubricant is injected from a foam injection nozzle of a foamer toward the circumferential surface of the wire coil. The foam supplied to the circumferential surface of the wire coil enters between the rings of the wire coil, but if the bubbles are simply sprayed, some of the foam may not enter between the rings and slide down the circumferential surface of the wire coil.

Therefore, in the wire lubricating device of the first aspect of the invention, the supplied foam is held by the cover between the foamer and the circumferential surface of the wire coil, and is prevented from slipping off.
Therefore, most of the supplied foam enters between the rings and acts as a lubricant. Of course, since the lubricant is in the form of foam, it will not scatter around even if it is sprayed.

Moreover, in the wire rod lubrication device of the second invention, the foamer is moved along the circumferential surface of the wire rod coil, that is, rotated around the wire rod coil axis. While moving the foamer, foam is supplied to the circumferential surface of the wire coil. Therefore, a smaller amount of foam is supplied to a narrower area than in the device of the first invention. This further reduces losses due to flowing down of the supplied foam. In addition, since the foamer is equipped with a brush that sweeps the circumferential surface of the wire coil, foam can be uniformly supplied to the circumferential surface of the wire coil, and the foam can also be delivered to the inside of the wire coil in a short time. can be penetrated.

Further, in a rotatable cylindrical foamer in which a brush is implanted over the entire outer periphery, the foamer revolves around the wire coil axis and also rotates around the cylindrical axis. Therefore, the foam is more uniformly supplied to the circumferential surface of the wire coil.

(Embodiment) FIG. 1 shows an embodiment of the first invention, and is a perspective view of a lubricating device.

The lubricating device 11 mainly includes a foamer 12 and a cover 1.
9, 29, a lubricant supply tank 31 and an air tank 35.

The foamer 12 consists of a main foamer 14 and an auxiliary foamer 24. The main foamer 14 has a cylindrical main body 15 and a plurality of foam injection nozzles 17 at the bottom.
are arranged along the cylinder axis direction. The main body 25 of the auxiliary foamer 24 also has a cylindrical shape, and its diameter is considerably smaller than that of the main foamer 14. A plurality of foam injection nozzles 27 are arranged on the side of the auxiliary foamer main body 25 along the cylinder axis direction. Main foamer body 15 and auxiliary foamer body 25
It is equipped with an aqueous lubricant solution injection nozzle and a metal net (not shown) inside, and the aqueous solution injected from the nozzle is mixed with compressed air and foams as it passes through the net.

The main foamer body 15 is arranged so that the vinyl cover 19 is distributed by the main foamer body 15.
It hangs down from both sides of the main foamer body 15.
is fixed to. Further, a cover 29 made of a plastic plate is attached laterally from the outer peripheral surface of the auxiliary foamer 24.

A lubricant supply tank 31 is connected to the main foamer body 15 via a stop valve 32 and a supply pipe 33 . The lubricant supply tank 31 contains an aqueous solution containing a lubricant. The aqueous solution in this example was prepared by dissolving a fatty acid complex amine salt and an alcoholic amine in water so that the respective concentrations were about 0.1 wt%.

Furthermore, an air tank 35 is provided in the main foamer main body 15.
are connected by a supply pipe 37 via a stop plate 36. The air tank 35 is filled with compressed air by a compressor (not shown).

Similarly, a lubricant supply tank 31 and an air tank 35 are also connected to the auxiliary foamer main body 24.

Next, a method for lubricating a wire coil using the apparatus configured as described above will be described.

In a production line for hot-rolled wire rods, steel materials are heated to a predetermined temperature in a heating furnace, passed through a rough rolling mill and an intermediate rolling mill, and processed into wire rods of predetermined dimensions and diameters in a high-speed block mill. The wire is then wound into a non-concentric coil wire using a laying head winding machine, cooled uniformly to a predetermined temperature in a regulating cooling line, and then bound with hoops by an automatic binding machine for the next processing step. be transported. Lubrication of the wire rod coil is performed immediately before the above-mentioned bundling.

As shown in FIG. 1, the wire coil 1 is suspended from a hanger hook 5 and positioned directly below the main foamer 14. At this time, the lower end of the cover 19 is in contact with the outer peripheral surface of the wire coil 1. Further, the auxiliary foamer 24 is located inside the wire coil. Next, the stop valve 32 is opened and the aqueous solution containing the lubricant is poured into the main foamer 14.
and auxiliary foamer 24 about 5/mim each.
At the same time, the stop valve 36 is opened to blow compressed air into both the foamers 14 and 24 at a rate of about 250/mim. The aqueous solution foams in both the foamers 14 and 24 to become foam, and the nozzles 17 and 24 of both the foamers 14 and 24
27 to the outside of the wire coil 1 and toward the inner circumferential surface. The foam is held by the covers 19 and 29 and enters the gap between the rings of the wire coil 1 from the outer and inner circumferential surfaces of the wire coil. The bubbles that have entered the wire uniformly adhere to the surface of the wire and act as a lubricant. Once the foam has sufficiently spread over the wire,
The supply of aqueous solution and compressed air to both foamers 14, 24 is stopped. The wire rod coil 1 thus lubricated with foam is immediately dried by the hot rolling residual heat of the wire rod itself, and then compressed and bound by a binding machine.

FIG. 2 shows an embodiment of the second invention, and is a perspective view of a lubricating device. Note that in FIG. 2, the lubricant supply tank and air tank are the same as those in FIG. 1, so they are omitted.

The lubricating device 41 has two outer foamers 44 and two inner foamers 54 each having cylindrical bodies 45 and 55.
Each book is provided. The outer foamer main body 45 is provided with a plurality of nozzles 47, and a nylon brush 49 is attached along the axial direction of the cylinder. Similarly, the internal foamer 54 also has a nozzle 57 and a brush 5.
It is equipped with 9.

A supply pipe 61 made of a fork-shaped double pipe is connected to one end of the main bodies 45, 55 of the outer and inner foamers 44, 54. A main pipe 62 of the supply pipe 61 is rotatably supported, and is rotationally driven by a motor 64 via a reduction gear 66 . Further, a rotary joint 68 is connected to the main pipe 62 of the supply pipe 61 . An aqueous solution containing a lubricant and compressed air are supplied to the supply pipe 61 from the lubricant supply tank and the air tank via the rotary joint 68.

In the apparatus configured as described above, the wire coil 1 is moved so that the brush 49 of the outer foamer 44 contacts the outer peripheral surface of the wire rod coil 1, and the brush 59 of the inner foamer 54 contacts the inner peripheral surface. Hang and hold on a hanger hook (not shown). and,
An aqueous solution containing a lubricant and compressed air are supplied to both the foamers 44 and 54, and the supply pipe 61 is rotated while spraying foam from the nozzles 47 and 57. Since the brushes 49 and 59 slide on the circumferential surface of the wire coil,
The foam supplied to the peripheral surface enters between the rings of the wire coil 1 without dripping and lubricates the wire.

FIG. 3 shows another embodiment of the second invention, and is a front view of a lubricating device 71. In FIG. 3, the rotary drive device, rotary joint, lubricant supply tank, and air tank are the same as those in FIG. 2, so they are omitted.

The main bodies 77 of the outer and inner foamers 73, 75 are rotatably attached to a supply pipe 83 made of a fork-shaped double pipe so as to maintain airtightness. outside,
The inner foamers 73 and 75 are connected to the main body 7 as shown in FIG.
A nozzle 79 is arranged over the entire surface of 7, and a brush 81 is also implanted. A rotary drive device similar to that shown in FIG. 2 is operatively connected to the supply pipe 83, and an aqueous solution containing a lubricant and compressed air are supplied through the rotary joint.

The apparatus of this embodiment is operated in the same manner as the apparatus of FIG. 2 above. When the supply pipe 83 is rotated around the coil axis, the brush 81 slides on the circumferential surface of the wire coil. At this time, the main body 7 of the outer and inner foamers 73, 75
7 rotates due to friction between the brush 81 and the circumferential surface of the wire coil. In this embodiment, the outer and inner foamers 7
Since the main body 77 of No. 3, 75 supplies foam to the surface of the wire rod coil while rotating, the wire rod is lubricated more uniformly. In addition, the brush gets hardly caught between the wire rings, and the life of the brush is greatly extended.

In addition, in the above-mentioned lubrication treatment, the lower the foaming ratio (foam volume ()/aqueous solution volume ()), that is, the higher the water content in the foam, the lower the viscosity of the foam. For this reason, the foam drips down the surface of the wire and does not adhere to the surface of the wire, making it impossible to obtain a sufficient lubrication effect. On the other hand, when the viscosity is increased, the fluidity of the foam deteriorates, making it difficult to completely fill the gaps between the rings of the wire coil with the foam. Therefore, a foaming ratio suitable for lubrication of the wire rod is selected. Alternatively, a method of simply injecting foam from the outside of the wire coil may be considered, but in this method, a large amount of foam becomes ineffective as the foam slides down or bounces off the surface of the wire coil. In addition, in order to prevent dripping from the bottom end of the wire coil, the foaming ratio of the foam is increased (>50 times).
Then, the permeability of the foam into the inside of the wire coil becomes poor, and the flaw reduction effect decreases.

(Effects of the Invention) In this invention, the foam supplied to the circumferential surface of the wire coil is held by a cover or a brush, which prevents the foam from slipping off and allows foam with a high expansion ratio to be deposited inside the wire coil in a short time. can be penetrated. Therefore, there is very little lubricant dripping from the lower end of the coil, resulting in high coating efficiency and further improved flaw reduction rate. In particular, in the case of a device in which the brush moves along the circumferential surface of the wire coil, the lubricant can be applied uniformly to the wire.

Compared to the wire rod coils lubricated by the most popular air atomization spray method and compressed and bundled, the foam-lubricated wire coils produced by the device of the present invention are
During compression binding, the inside is evenly lubricated with foam. Therefore, compression flaws during binding can be significantly reduced, and the height of the coil can also be reduced. With this, troubles such as breakage caused by compression flaws can be completely eliminated. Furthermore, even if we increase the unit weight of coils or increase the size of wire rods to smaller diameters, it is difficult to charge them into existing heat treatment furnaces, or to process them after bundling at supply stands and pickling tanks at customers. This can be carried out without causing any trouble due to the height of the coil. Furthermore, there is no dripping of aqueous solution or generation of fumes, and there is no need for treatment equipment for lubricant dripping from the lower part of the coil or treatment equipment for spattered lubricant.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a lubricating device showing an embodiment of the first invention, FIG. 2 is a perspective view of a lubricating device showing an embodiment of the second invention, and FIGS. 3 is a front view of a lubricating device, and FIG. 4 is a perspective view of a foamer equipped with a brush. 1... Wire coil, 11, 41, 71... Lubricating device, 12, 14, 24, 44, 54, 73, 7
5... Foaming machine, 17, 27, 47, 57, 79...
... Nozzle, 19, 29 ... Nozzle, 31 ... Lubricant supply tank, 33, 36, 61, 83 ... Supply pipe, 35 ... Air tank, 49, 59, 81 ...
brush.

Claims (1)

[Claims] 1. In an apparatus for supplying lubricant to a wire coil to lubricate between rings of the wire coil before bundling the wire coil, a plurality of foam injection nozzles are arranged along the axial direction of the wire coil. a cover for holding the injected foam between the foamer and the peripheral surface of the wire rod coil, a device for supplying an aqueous solution containing a lubricant to the foamer, and a device for supplying compressed air to the foamer. A wire lubricating device characterized by comprising: 2. In a device that supplies lubricant to the wire coil to lubricate between the rings of the wire coil before bundling the wire coil, a plurality of foam injection nozzles are arranged along the axial direction of the wire coil, and spray foam on the circumferential surface of the wire coil. a foamer movably supported along the foamer; a brush attached to the foamer so as to sweep the peripheral surface of the wire coil; a drive device that moves the foamer along the peripheral surface of the wire coil; A wire lubricating device comprising a device for supplying an aqueous solution containing a lubricant and a device for supplying compressed air to a foamer. 3. The foamer has a cylindrical shape extending along the axial direction of the wire coil, is rotatably supported around the cylindrical axis, and the brush is planted all over the outer periphery of the foamer. A wire lubricating device according to claim 2.