JPS6365384B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an electrostatic oil applicator for forming a thin oil film on the outer peripheral surface of a wire, such as a welding wire.

In recent years, welding wire has been manufactured using static electricity to form a thin oil film of oil particles on the outer surface of the wire for purposes such as rust prevention and lubrication to ensure good feeding to the welding machine before winding it onto a winding drum in the final forming process. It is painted on.

The reason for applying a thin oil film using static electricity is
It is difficult to form a uniform thin oil film on the outer circumferential surface of the wire with conventional lubricating devices that pass through oil-impregnated fibers, and frictional resistance with the wire guide etc. when feeding the wire to the welding machine is difficult. If you try to form a uniform oil film, the amount of oil applied will increase and the oil will adhere to the feed rollers of the welding machine, causing slips and making it impossible to feed. There are disadvantages such as run-off and increased diffusible hydrogen in the weld metal, resulting in poor welding.In contrast, electrostatic oiling can form a thin, uniform oil film with a small amount.
This is because it has the advantage of requiring only a small amount of oil consumption.

By the way, since the conventional electrostatic oil applicator is used by being incorporated into a wire rod production line, the surface of the wire rod carried into the electrostatic oil applicator is free from iron scraps, iron oxide powder, etc.
Other dust adheres and is introduced into the electrostatic oil applicator and mixes with the oil in the equipment, contaminating and deteriorating the oil, and clogging the atomizing nozzle that atomizes the oil. However, the impurity-containing oil agent was applied to the wire rod, resulting in inconveniences such as product defects.

The inventors of the present invention have conducted various experiments regarding the entry route of impurities such as iron scraps and dust, and have found that in addition to dust, etc. that adheres to the wire rod and is carried into the main body of the oil applicator, there are also It has been found that charred substances obtained by carbonizing the oil agent mix into the oil agent and promote staining and deterioration of the oil agent.

In addition, the lubricant is most often contaminated by dust attached to the wire near the guide on the carry-in side where the wire is introduced into the lubricating device, but there is almost no contamination of the lubricant from the middle to the carry-out side. It was confirmed.

In view of the above, an object of the present invention is to provide a novel electrostatic lubrication device for wire rods, which can eliminate the disadvantages of the conventional devices by using a collection mechanism to recover impurity-containing oil in the electrostatic lubrication device. Our goal is to provide the following.

Another object of the present invention is to provide an electrostatic oil applicator equipped with a recovery mechanism capable of recovering all impurity-containing oil.

Still another object of the present invention is to provide an electrostatic oil applicator equipped with a recovery mechanism that separates and collects the impurity-containing oil flowing down from the vicinity of the carry-in guide body from the almost clean oil flowing down from other parts. .

According to the present invention, in an electrostatic oil applicator that applies electrically charged atomized oil particles to a wire rod that is transported at a required speed, a liquid oil agent is atomized in the lower part of the oil applicator main body. An atomizing nozzle is provided, and an ionizer is provided above the atomizing nozzle to charge the atomized oil particles conveyed by the conveying air. A recovery mechanism is provided to collect impurity-containing oil particles that are deposited on the wall surface and flow down within the oil applicator body from among the atomized oil particles that have passed through the ionizer while being guided by the body and the discharge-side guide body. Provided is an electrostatic lubrication device for a wire rod, characterized in that:

Further, according to the present invention, there is provided an electrostatic oil applicator, characterized in that the recovery mechanism is configured to recover all the flowing oil deposited on the wall surface and flowing down within the oil applicator main body. .

Further, according to the present invention, there is provided an electrostatic oil application device, wherein the recovery mechanism is configured to recover only the impurity-containing oil agent near the carry-in guide body.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 is a longitudinal sectional view showing an embodiment of an electrostatic oil applicator in which the oil recovery mechanism according to the present invention is configured to recover all atomized oil, and FIG. It is a sectional view on the A line.

In the figure, reference numeral 1 denotes a grounded oil applicator main body through which a welding wire 2 is horizontally carried in and out through a carry-in guide 3 and a carry-out guide 4, and an oil storage tank 5 in which a liquid lubricant is stored in the lower part. is formed.
Each of the guide bodies 3 and 4 has a cylindrical shape with a guide hole 6 bored in the center and a slot 7 that communicates with the guide hole 6 and extends to a part of the outer peripheral surface. They are fixed to left and right side plates 8 and 9 of the oil applicator main body 1, respectively.

Reference numeral 10 indicates a large number of atomizing nozzles arranged in parallel along the front plate 11 above the oil storage tank 5. The oil agent is sucked through the suction strainer 13, and the oil agent is atomized and sprayed.

Reference numeral 15 denotes a conveying air introduction pipe connected to a blower (not shown), through which a flow rate of conveying air proportional to the transfer speed of the welding wire 2 from the blower is introduced into the lubricating device main body 1. . 16 is the introduction pipe 15
It is a round plate disposed on the upper part of the oil applicator main body 1, which extends obliquely forward and downward from the rear plate 17 of the oil applicator main body 1, and is used to collect relatively coarse particles among the oil particles atomized from the atomizing nozzle 10. It is regulated to prevent it from being directly transported into the ionizer, which will be described later. The full plate 16 is usually made of a flat plate, but a breathable plate such as a punched medal may also be used.

Reference numeral 18 denotes an ionizer disposed above the baffle plate 16 at a required interval, and is fixed to the front plate 11 of the oil applicator main body 1 and has a long hole 19 parallel to the welding wire 2. A base plate 2 consisting of a horizontal plate 20 and an inclined plate 22 having an oil hole 21 extending downward from the rear edge and fixed to the rear plate 17.
It is installed vertically on 3. The ionizer 18 includes a pair of atomized oil guide walls 24 and 2 that guide atomized oil particles supplied through a lower slit-shaped elongated hole 19.
4, and an ionizer electrode 25 stretched in two stages, upper and lower, between both guide walls 24, 24,
The high voltage applied to the ionizer electrode 25 charges the atomized oil particles passing between the guide walls. The distance between the atomized oil guide walls 24, 24 becomes gradually narrower as it goes upward, and a slit-shaped oil particle spout 26 is formed at the upper end of the atomized oil guide walls 24, 24 close to and facing the welding wire 2. Moreover, both ends between the guide walls 24, 24 are sealed. However, oil particles with a coarse particle size are removed by the ionizer 18.
Dust is collected and captured in the welding wire 2, and only charged oil particles with extremely fine particle diameters are sprayed intensively onto the welding wire 2 without leaking to the sides.

28 is a convection hood disposed to cover the upper part of the ionizer 18 and the welding wire 2,
A demister 3 is formed to have an inverted U-shape in cross section, and its central upper portion is disposed on the top plate 29 of the oil applicator main body 1.
0 is attached to the lower surface of the mounting plate 31 that accommodates the oil, and both lower edges thereof are inclined to widen to form an oil particle passage 32 between them and the inclined wall 24' of the atomized oil guide wall 24. There is.

Reference numeral 33 is a driving electrode stretched above and parallel to the welding wire 2 in the convection hood 28, and the oil agent is convected by applying a high voltage of the same polarity as the ionizer electrode. Wire 2 for welding particles
It is for depositing on top. Reference numeral 34 denotes an inverted V-shaped hood that prevents the oil agent disposed at the mounting portion of the driving electrode 33 from dripping onto the welding wire 2 .

In FIGS. 1 and 2, reference numeral 36 denotes a recovery mechanism for recovering impurity-containing oil, and the space between the oil storage tank 5 and the atomizing nozzle 10 is hermetically partitioned by a horizontal partition plate 37. The upper part is used as a collection tank 38 for the flowing oil agent. In the recovery tank 38, the relatively large-diameter particles of the atomized oil particles injected from the atomization nozzle 10 adhere to the rear plate 17 and flow down; the atomized oil particles are conveyed by the conveying air. When the oil is applied, each inner wall of the oil applicator main body 1, the buttful plate 1
Oil agent that adheres to the surface of 6, the inner surface of the ionizer 18, etc. and flows down; the ionizer electrode 25 and the chasing electrode 3
The lubricant particles charged with 3 are deposited on the inner wall of the oil applicator main body 1, the outer surface of the ionizer 18, the inner and outer surfaces of the convection hood 28, and all of the flowing lubricant particles are collected. The oil collected in the recovery tank 38 is purified through a circulation path 41 that includes a filter 39 and a pump 40, and then returned to the oil storage tank 5. Reference numeral 42 denotes a vent hole formed in the upper part of the oil storage tank 5 and having a filter for taking in outside air.

Next, the operation of the above device of the present invention will be explained. First, the welding wire 2 is inserted into the oil applicator main body 1 through the carry-in side guide body 3 and the carry-out side guide body 4.

Next, compressed air is supplied to each atomization nozzle 10 to atomize the oil agent into fine particles, and at the same time, conveyance air is supplied into the oil applicator main body 1 through the conveyance air introduction pipe 15, and at the same time, the ionizer electrode 25 and A required high voltage is applied to each of the embedded electrodes 33.

When the welding wire 2 is transported at a required speed in this state, relatively fine particles among the oil particles atomized by the atomization nozzle 10 are transferred to the transport air introduced from the transport air introduction pipe 15 and Atomization nozzle 1
The compressed air introduced through the oil applicator body 1 is introduced into the ionizer 18 through the elongated hole 19 through the passage between the baffle plate 16 and the front plate 11 of the oil applicator main body 1.

The relatively fine oil particles introduced into the ionizer 18 are uniformly charged by the ionizer electrode 25 and some are collected on the atomized oil guide wall 24 . The ultrafine oil particles remaining without being collected are intensively sprayed onto the welding wire 2 from the spout 26 between the atomized oil guide walls 24 and 24, and together with the action of the driving electrode 33, the welding wire The oil is efficiently and uniformly deposited on the welding wire 2, and an extremely thin oil film is formed on the welding wire 2.

Among the charged oil particles injected from the ionizer 18, the charged oil particles remaining without being applied to the welding wire 2 are introduced into the convection hood 28, and are once raised inside the convection hood 28 by the carrier airflow. It descends again along the inner wall toward the welding wire 2 side. At this time, the oil particles are recharged by the driving electrode 33, and the descending charged particles increase the density of the charged oil particles in the vicinity of the welding wire 2 and stably maintain it at a required value. Accelerates the deposition of charged oil particles on the upper surface side of No. 2.

Thereafter, surplus oil particles that have not been deposited on the welding wire 2 pass through a passage 32, and are discharged to the outside through a demister 30, except for those deposited on the inner wall of the oil applicator main body 1, the outer wall of the ionizer 18, and the convection hood 28. is discharged into a device (not shown).

The oil mixed with impurities deposited on each wall surface in the oil application device 1 flows down each wall surface, drips through the oil passage hole 21 of the inclined plate 22 and the baffle plate 16, and is collected in the collection tank 38. The recovery tank 38 also collects the oil deposited on the inner surface of the ionizer 18 and the atomized oil atomized by the atomization nozzle 10 that collides with the rear plate 17 and flows down. The impurity-containing oil collected in the collection tank 38 is purified by the filter 39 one after another or every time a required amount is collected, and returned to the oil storage tank 5.

According to the above-described apparatus of the present invention, the collection mechanism recovers all the impurity-containing oil mixed with dust attached to the wire rod, so that it is possible to completely prevent impurities from entering the oil storage tank. Therefore, the oil in the oil storage tank can be maintained in a clean state for a long period of time, and contamination and deterioration of the oil, clogging of the atomization nozzle, product defects, etc. can be prevented.

Next, another embodiment of the present invention will be described based on the drawings.

FIG. 3 is a vertical cross-sectional view showing an embodiment of the electrostatic oil application device in which the oil collection mechanism according to the present invention is configured to collect only the impurity-containing oil in the vicinity of the guide member on the carry-in side; The figure is a sectional view taken along line AA. In the figure, parts corresponding to the configurations in FIGS. 1 and 2 are denoted by the same reference numerals, and detailed description thereof will be omitted.

According to this example, the recovery mechanism 36 includes a recovery tank 14 formed by partitioning the left side of the oil tank 5, that is, the entrance side of the welding wire 2 by the partition wall 43, and the partition wall 4.
3 and an inclined plate 45 extending upwardly to the right from the upper edge of the baffle plate 16 and facing the lower surface of the front edge of the buttful plate 16. In the collection tank 44, dust adhering to the welding wire 2 near the carry-in guide body 3 flows down from the floating position along the inner wall of the oil applicator main body 1 and the outer wall of the ionizer 18, and further flows down through the passage of the inclined plate 22. Oil hole 2
1 and the upper surface of the full plate 16 to the oil storage tank 5.
The impurity-containing oil dripping toward the tank is collected, and is returned to the oil storage tank 5 through a circulation path 41 interposed with a filter 39 and a pump 40 as necessary, or is discharged to the outside through a drain valve 46.

According to the above-described apparatus of the present invention, since the impurity-containing oil mixed with dust adhering to the wire is separated from other almost clean oil by the collection mechanism and collected, impurities are collected in the oil storage tank. Contamination can be prevented as much as possible, and the oil in the oil storage tank can therefore be maintained in a clean state for a long period of time, preventing contamination and deterioration of the oil, clogging of the atomization nozzle, product defects, etc. can do.

In the above embodiment, only a part of the embodiment of the present invention has been described, and the separation and recovery of the impurity-containing oil agent is carried out using the buffer plate 1 as shown in FIGS. 5 and 6.
For example, gutters 47 and 47' are formed on the lower surface of the front edge of the left side of the oil applicator 6 in correspondence with the recovery tanks 38 and 34, and the impurity-containing oil collected in these gutters 47 and 47' is carried out to the outside of the oil applicator main body 1. The oil may be led out and returned to the oil storage tank 5 through a circulation path 41 interposed with a filter 39 and a pump 40 as necessary.
It is also possible to omit the second oil passage hole 21 and use the upper surface side of the inclined plate 22 as a collection tank. Furthermore, the horizontal plate 20 is tilted in the same way as the inclined plate 22, and the ionizer 18
It is also possible to form recovery tanks on both sides of the tank.

Furthermore, the installation position of the oil recovery mechanism in the present invention is not limited to the installation positions of the above-mentioned embodiments, but can be selected at any position within the oil application device, or can be divided or provided in multiple stages. It may be a fixed type or a detachable type.

Further, the present invention is applicable not only to welding wire but also to forming an oil film on any other wire rod.

As described above, according to the present invention, since the impurity-containing oil mixed with dust attached to the wire is collected by the collection mechanism, it is possible to prevent impurities from entering the oil storage tank as much as possible. is possible,
Therefore, the oil in the oil storage tank can be maintained in a clean state for a long period of time, which has the effect of preventing contamination and deterioration of the oil, clogging of the atomizing nozzle, product defects, etc.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view showing an example of the device of the present invention, Fig. 2 is a cross-sectional view taken along the line A--A, Figs.
The figure is a sectional view showing another embodiment of the device of the present invention.
6 and 6 are cross-sectional views showing still another embodiment of the device of the present invention. DESCRIPTION OF SYMBOLS 1...Oil applicator main body, 2...Welding wire, 3...Introduction side guide body, 4...Export side guide body, 5...Oil storage tank, 1
0...Atomization nozzle, 18...Ionizer, 36...Recovery mechanism.

Claims (1)

[Scope of Claims] 1. In an electrostatic oil applicator that applies electrically charged atomized oil particles to a wire rod that is transported at a required speed, a mist that atomizes a liquid oil agent is provided in the lower part of the oil applicator main body. An atomizing nozzle is disposed, and an ionizer is disposed above the atomizing nozzle to charge the atomized oil particles conveyed by the conveying air. A collection mechanism is provided for collecting impurity-containing oil particles that are deposited on a wall surface and flow down within the oil applicator main body from among the atomized oil particles that have been guided and transferred by the discharge side guide and have passed through the ionizer. An electrostatic oil coating device for wire rods. 2. The device according to claim 1, wherein the recovery mechanism is configured to recover all the flowing oil deposited on the wall surface and flowing down within the oil application device main body. 3. The device according to claim 1, wherein the recovery mechanism is configured to recover only the impurity-containing oil near the carry-in guide.