JPH0363444B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in a lubrication method and device for wire drawing, and more specifically; The wire drawing material 2 is inserted and fed in one direction to the introduction hole 3 of the pass line C.
At the same time, a jet jet of the fluid 7 is sprayed in the feeding direction of the wire-drawn workpiece 2 at a certain point, and at the same time the introduction hole 3 is made negative pressure by the flow of the jet jet, and outside air is introduced into the apparatus main body through the introduction hole 3. After sealing the hole 3, a jet jet of the fluid 7 is sprayed in the direction opposite to the feeding direction of the wire-drawn workpiece 2 at the outlet hole 4 portion of the pass line C, and at the same time, the flow of the jet jet closes the outlet hole. 4 was made negative pressure, outside air was allowed to flow into the device main body through the outlet hole 4, the outlet hole 4 was sealed, and the lubricant 7a contained in at least one of the fluids 7 was applied to the surface of the wire-drawn material 2. The second invention relates to a lubrication method in a wire drawing process, which is characterized in that a die B performs a wire drawing process and collects the fluid 7 ejected into the jet jet expansion space 1. ``A jet jet expansion space 1 is provided inside the device main body, and an introduction hole 3 and an outlet hole 4 that open on the outer surface of the device main body are provided in the device main body,
Jet jet passage holes 5, 5 are formed between the jet jet expansion space 1 and the introduction hole 3 and between the jet jet expansion space 1 and the outlet hole 4, so as to penetrate through the device body and on the outlet side of the device body. A pass line C is formed in which the drawn material 2 enters the installed die B, and a fluid 7 containing a lubricant 7a is ejected from at least one of the die B toward the jet jet expansion space 1 through the jet jet passage hole 5. Fluid ejection holes 8, 8 are formed at the boundary between the jet jet passage hole 5 and the introduction hole 3 and between the jet jet passage hole 5 and the outlet hole 4, respectively, so that the jet jet expansion space 1 is connected to the outer surface of the main body of the apparatus. A lubrication device for wire drawing, characterized in that a discharge hole 9 is provided which opens into the lubricant 7a, the discharge hole 9 is connected to a recovery device 24 for the lubricant 7a, and a die B is arranged facing the outlet hole 4. ”.

For wire drawing, muddy lime is applied uniformly to the surface of the wire-drawn material, and then the muddy lime is dried to form a lime film on the surface of the wire-drawn material, and this lime film is used as a lubricant. There is a dry method in which wire is drawn, a wet method in which wire is drawn while applying soapy water, mineral oil, or other lubricant directly to the die, and a method in which muddy lime is evenly applied to the surface of the wire-drawn material and left in an undried state. Generally, the surface roughness of the wire-drawn materials is different (the dry method is roughest, the wet method is intermediate, and the water method is the densest). ), so they are used differently depending on the purpose. Now, the dry method has the simplest wire drawing equipment, but it takes time and effort to pre-process the wire drawing process, such as applying lime and drying, and lime is scattered inside the factory during the wire drawing process.
The wet method has the disadvantage that it damages the working environment, the lubricant applied to the die scatters and pollutes the factory, and a fixed liquid receiver is required, making the equipment exclusive to the wet method. There is a problem that it cannot be used. In addition, although the water-drawing method produces a mirror-like finish on the surface of the wire-drawn material, the dies are subject to severe wear.
There are many practical problems. As mentioned above, each wire drawing method has its advantages and disadvantages, and the equipment is unique and cannot be easily shared, so each processing manufacturer has its own line.

The present invention has been made in view of the above-mentioned conventional situation, and an object of the present invention is to easily implement all processing methods with one device, and to avoid polluting the factory environment. An object of the present invention is to provide a lubrication method and apparatus for wire drawing that does not require any pretreatment during wire drawing.

The present invention will now be described in detail with reference to illustrative embodiments.

The wire-drawn material 2 used in the present invention is usually a wire rod, but may also be a bar material. In addition, the material is generally iron wire, but copper, aluminum, and other types may be used.

FIG. 2 shows an embodiment of the lubricant applicator A used in the present invention.
1 is fitted into the T-shaped tube 10 with the first cap nut 12, and the space sandwiched between the guide outer cylinder 11 within the T-shaped tube 10 is the jet jet expansion space 1.
This is the space into which the jet jet described later is blown into and rapidly expands.

To explain the jet jet expansion space 1,
It may be cylindrical or rectangular, or a spiral groove may be formed on the inner wall to actively form a swirling flow in the jet jet expansion space 1. Further, the shape of the jet jet expansion space 1 may be formed to have an elliptical cross section, a bowl shape, or a funnel shape in accordance with the diffusion of the jet jet.
Further, although the shape of the jet jet expansion space 1 is small in the embodiment diagram, it is of course not limited to this. If the pressure of one jet jet is high and the pressure of the other jet jet is weak, the weaker jet jet will overcome the water pressure in the jet jet expansion space 1 and flow backward. It may also be possible to prevent this from happening.

In the figure, the downwardly extending portion of the T-shaped pipe 10 is a discharge hole 9 that opens to the outside from the jet jet expansion space 1.
It is. An inner cylinder insertion hole 13 is bored in the outer half of the guide outer cylinder 11, and a guide inner cylinder 14 is screwed into the inner cylinder insertion hole 13 so as to be able to be screwed forward and backward.
The hole bottom 15 of the inner cylinder insertion hole 13 is formed in the shape of a mortar, and a jet jet passage hole 5 communicating from the hole bottom 15 into the T-tube 10 is bored in the center of the guide outer cylinder 11.

The insertion side end of the guide inner cylinder 14 is provided with a needle valve 16.
The tip of the needle valve 16 is also tapered, and the needle valve 16 and the hole bottom 15
The fluid ejection hole 8 is opened with a slight gap between the
The angle θ between the fluid ejection hole 8 and the outlet hole 3 or 4 is an acute angle of about 15 degrees to 60 degrees. The distance between the fluid ejection holes 8 is adjusted by the amount of screwing into the guide inner cylinder 14, and after adjustment, the adjusting nut 17 is tightened to fix it. The fluid 7 such as the lubricant 7a and the compressed air 7b is vigorously jetted out from the fluid jetting hole 8, becomes a jet jet, passes through the jet jet passing hole 5 at a high speed, and, as described above, enters the jet jet expansion space 1. is injected into.

Since the needle valve 16 has a considerably smaller diameter than the inner cylinder insertion hole 13, a fluid reservoir 18 is generated around the needle valve 16. Further, as another embodiment of the fluid jet hole 8, a spiral groove may be carved in the hole bottom 15 or the tapered surface of the needle valve 16, so that the fluid 7 can be spouted into the jet jet passage hole 5 while swirling. be. Further, the fluid ejection hole 8 is not limited to the ring-shaped one composed of the needle valve 16 and the tapered hole bottom 15 as described above, but small holes may be bored around a large number of jet jet passage holes 5. It's a good thing. The fluid reservoir 18 has a fluid supply hole 1 communicating with the outside.
9 is provided. Further, a nozzle 20 is fitted into the tip of the guide inner cylinder 14 to improve wear resistance, and is fixed with a second cap nut 21. The material of the nozzle 20 is selected from a material with excellent wear resistance, such as ceramics, carbide, or wear-resistant resin. Of course, the nozzle 20 may be attached by press fitting. A hole is formed at the center of the nozzle 20 and the guide inner cylinder 14 to match the outer shape of the wire-drawn material 2,
It is slightly thicker than the outer diameter (i.e., the width is such that the fluid 7 does not flow backwards due to negative pressure in the introduction hole 3 and outlet hole 4 due to the flow velocity of the jet jet flow), and slightly narrower than the jet jet passage hole 5. An introduction hole 3 and an outlet hole 4 each having an inner diameter formed in the same diameter are bored.

The fluid 7 supplied to the fluid supply hole 19 contains gas,
There are liquids and powders. In the case of liquids, there are water to support lime powder, detergents and mineral oil to perform the same role, and examples of gases are those supplied separately as shown in Figure 3. There is compressed air 7b for sucking the lime powder 7a, but when creating a non-oxidizing atmosphere, fluorocarbons, nitrogen, etc. are used. In the case of powder, as shown in FIG. 3, it is very fine dry lime powder 7a. Of course, the compressed air 7b may be loaded with lime powder 7a and supplied.

Lubricants used in the present invention include lime powder, mineral oil, and the like.

First, the case where wet wire drawing is performed using this apparatus will be explained with reference to FIGS. 1 and 2.

As shown in FIG. 1, the fluid supply hole 19 is connected to the recovery device 24 via the circulation pump 23 and the filter 22.
The discharge hole 9 is connected to the inlet of the collection device 24. Next, the wire-drawn workpiece 2 is inserted from the lead-out hole 3 to the lead-out hole 4, and fed in one direction on the pass line C at a constant speed. When the circulation pump 23 is operated at the same time as the wire-drawn material 2 is fed, the clean lubricant 7a filtered by the filter 22 flows into the fluid supply holes 1 provided before and after the lubricant applicator A.
The fluid passes through 9 and enters the fluid reservoir 18, and then is suddenly sent into the jet jet passage hole 5 from the narrow fluid jet hole 8. The lubricant 7a passes through the jet jet passage hole 5 at a rapid speed and brushes the surface of the wire-drawn workpiece 2 to clean the surface and at the same time forms a thin film of the lubricant 7a. At this time, as can be seen from the figure, the jet jets face each other and are ejected in opposite directions, so that they collide within the jet jet expansion space 1. The wire-drawn workpiece 2 on which the film of lubricant 7a has been formed in this way is then drawn into a die B and narrowed into a reduced cross-sectional shape or an irregular cross-sectional shape other than circular. In the wet method, as mentioned above, water containing lime powder, soapy water, or mineral oil is generally used as the lubricant 7a.
An appropriate lubricant 7a will be used depending on the purpose and material. At the introduction hole 3, a negative pressure is created by the flow of the lubricant image agent 7a in the jet jet passage hole 5, and a seal is formed by the outside air flowing into the introduction hole 3, so that the lubricant 7a does not leak outside from the introduction hole 3. . In addition to this effect, on the outlet hole 4 side, excess lubricant 7a is removed by the outside air sucked into the outlet hole 4.
is peeled off, and the appropriate amount and uniform application is achieved. Lubricant 7 sprayed in this way
A rapidly expands in the jet jet expansion space 1, then decelerates in the center of the jet jet expansion space 1, advances to the discharge hole 9, enters the recovery device 24, and is filtered by the filter 22. The filtered lubricant 7a accumulates at the bottom of the recovery device 24 and is recycled for reuse. The amount of lubricant 7a supplied is adjusted by a flow valve 29. Moreover, although the case where the lubricant 7a is pressurized into the fluid supply hole 19 by the circulation pump 23 is shown here, the same result can be obtained even if the lubricant 7a is sucked from the discharge hole 9. In some cases, the lubricant 7a may be mixed with the compressed air 7b and injected onto the wire drawing material 2, as shown by the imaginary line in FIG. The jet stream may be compressed air 7b. Also, the first jet jet is water, the second jet jet is fine powder lime,
After wetting the surface of the wire-drawn material 2 with water, finely powdered lime may be sprayed to form a thin lime film, which may also be used as a lubricating layer.

Incidentally, even if the cross section of the wire-drawn workpiece 2 is not circular but has an intricate shape, the jet jet is injected deep into the wire, making it possible to completely apply the lubricant 7a.

Fig. 3 shows an example in which the fluid supply hole 19 on the side of the introduction hole 3 is divided into two parts. The lubricant 7a supplied to the supply hole 19 is sucked in. Further, in FIG. 3, a guide middle cylinder 6 is screwed into the guide outer cylinder 11, and a jet jet passage hole 5 is formed in the guide middle cylinder 6. In this case, by preparing a large number of guide tubes 6 with jet jet passage holes 5 having different diameters and replacing them as appropriate, it is possible to adapt to wire rods with different diameters.

In the case of the water-drawing method, the lime-containing liquid is made into a jet jet and is sprayed onto the wire-drawn material 2.

In addition, in the case of the dry method, since the surface of the wire-drawn workpiece 2 is coated with lime powder as a lubricant in advance, the lubricant applicator A must be removed during the work. Therefore, one line can perform three types of work, and there is no need to prepare three lines as in the past.

Further, in the illustrated embodiment, the die B and the introduction hole 4 are separated from each other, but the present invention is not limited to this, and the die B and the introduction hole 4 may be closely attached or fixed as shown in FIG. A ventilation hole 25 and a drainage hole 26 for sending the lubricant 7a accumulated on the front surface of the die B to the recovery device 24 or discharging it to the outside may be provided nearby.

Since the first invention is the method described in item 1, the lubricant is used only in a closed loop and does not leak to the outside, and does not pollute the environment within the factory. In addition, since the lubricant is sprayed onto the wire-drawn material in the form of a jet jet, it is possible to not only apply the lubricant, but also to clean dust attached to the surface. Since it is a pair, the treatment is performed twice in different directions, with the jet jet in the forward direction and the jet jet in the reverse direction, making it possible to completely remove dirt that cannot be removed in the forward direction. At the same time, it has the dual effect of stripping away excess lubricant and allowing the appropriate amount of lubricant to be applied.

In the second invention, since the configuration is as described in the second item, the introduction hole and the outlet hole that coincide with the pass line are air-sealed, and the lubricant recovery device is connected to the lubricant application device. Because the lubricant is connected to the outside, the lubricant does not leak outside, allowing work to be done in a closed loop and keeping the work environment clean. Further, since a jet jet expansion space is provided inside the device main body, the injected lubricant can be easily discharged without leaking to the outside.

In addition, due to the suction effect of the jet jet flowing toward the jet jet expansion space, negative pressure is created at the introduction hole and the outlet hole, so it is possible to eliminate lubricant leakage as described above, and at the same time, there is no leakage at the outlet hole. In addition to this effect, there is an advantage that excess lubricant is stripped off by the jet jet in the opposite direction, forming a uniform coating layer.

[Brief explanation of drawings]

Fig. 1...Flow diagram of one embodiment of the present invention, Fig. 2
Figures... Longitudinal sectional view of the first embodiment of the present invention, Figure 3...
. . . Longitudinal sectional view of the second embodiment of the present invention, FIG. 4 . . . Longitudinal sectional view of the third embodiment of the present invention. A...Lubricant applicator, B...Dice, C...
Pass line, 1...Jet jet expansion space, 2...
...Surface treated material, 3...Introduction hole, 4...Output hole,
5... Jet jet passage hole, 6... Guide middle cylinder,
7...Fluid, 8...Fluid jet hole, 9...Drain hole,
θ...Angle between the fluid jet hole and the introduction or outlet hole.

Claims (1)

[Scope of Claims] 1. The wire-drawn material 2 is inserted through a pass line C formed to penetrate the apparatus main body and fed in one direction, and the wire-drawn material 2 is inserted into the introduction hole 3 portion of the pass line C. At the same time as a jet jet of the fluid 7 is sprayed in the feeding direction, the introduction hole 3 is made negative pressure by the flow of the jet jet, outside air is allowed to flow into the main body of the apparatus through the introduction hole 3, and the introduction hole 3 is sealed. After that, a jet jet of the fluid 7 is sprayed in the direction opposite to the feeding direction of the wire-drawn workpiece 2 at the outlet hole 4 portion of the pass line C, and at the same time, the flow of the jet jet blows the outlet hole 4.
is made negative pressure, outside air is allowed to flow into the device main body through the outlet hole 4, the outlet hole 4 is sealed, and the lubricant 7a contained in at least one of the fluids 7 is applied to the surface of the wire-drawn material 2. A method of lubrication in wire drawing, characterized in that wire drawing is performed with a die B and fluid 7 ejected into jet jet expansion space 1 is recovered. 2. A jet jet expansion space 1 is provided inside the device body, and an introduction hole 3 and an outlet hole 4 that open on the outer surface of the device body are provided in the device body, and the jet jet expansion space 1 and the jet jet expansion space 1 are provided in the device body. Expansion space 1
Jet jet passing holes 5, 5 are formed between the wire and the outlet hole 4 to form a pass line C that passes through the device body and the wire-drawn workpiece 2 enters the die B installed on the exit side of the device body. , the jet jet passage holes 5 are arranged so that the fluid 7 containing the lubricant 7a is jetted from at least one of them toward the jet jet expansion space 1 through the jet jet passage holes 5.
Fluid jet holes 8, 8 are formed at the boundary between the jet jet and the introduction hole 3, and between the jet jet passage hole 5 and the outlet hole 4, respectively, and a discharge hole 9 is provided which opens from the jet jet expansion space 1 to the outer surface of the device main body. A lubrication device for wire drawing, characterized in that a discharge hole 9 is connected to a recovery device 24 for lubricant 7a, and a die B is arranged facing the outlet hole 4. 3. The lubrication device for wire drawing according to claim 2, characterized in that the recovery device 24 and the fluid jet hole 8 are connected via the circulation pump 23.