JP2002018717A - Method of treating surface of long-sized product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of treating the surface of a long-sized product even without skill, causing no environmental problem. SOLUTION: This method of treating the surface of the long-sized product includes a process of fitting powder and grain in a container, constituting the inside of the container to allow the long-sized product to pass through and bringing the surface of the long-sized product into contact with the powder and grain by passing the long-sized product through the inside of the container; and a process of discharging fine powder produced from the contact and from the mutual contact of the powder and grain, or/and foreign matters chipped from a workpiece surface, to the outside of the container, with gas flow flowing through the inside of the container.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a surface treatment method for long products such as corners and irregular shapes. In particular,
The present invention relates to a method for applying a surface treatment such as surface roughening, surface polishing, hairline treatment, and foreign matter removal to a long product using a granular material.

[0002]

2. Description of the Related Art Conventionally, surface grinding is generally performed using a cutting tool, a grinding wheel, a brush, a belt sander, or the like.
Since it is extremely difficult to keep the cutting conditions of the work constant, it is extremely difficult to continuously perform the outer circumference of a long linear product having a small sectional dimension of the work. This is known (see, for example, Japanese Patent No. 2857279). However, the pickling method can remove the surface layer of the work without being limited by the cross-sectional shape and dimensions, but has a problem in that waste treatment and environmental measures are expensive. Further, the pickling operation has problems such as requiring skill. On the other hand, in the peeling method, the surface layer of the material is cut out with a cutting tool such as a die. At that time, tension is applied to the work due to cutting resistance, and the work may be disconnected. You.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a surface treatment method for a long product which does not cause environmental problems and requires no skill. And

[0004]

Means for Solving the Problems In order to achieve the above object, a surface treatment method according to the present invention comprises filling a granular material into a container and passing a long product through the container. A step of passing the long product through the container to bring the surface of the long product into contact with the powder and granules; and, by a gas flow flowing through the container, the fine powder and / or the work generated by the mutual contact of the powder and the granules and the contact. Discharging the foreign matter shaved off from the surface to the outside of the container. Advantageous Effects of Invention The surface treatment method for long products according to the present invention has an advantage that it does not require skill of an operator and is environmentally friendly.

Here, the shape of the powder used in the present invention is not limited. When the powder has a polygonal shape, its corners are suitable for removing foreign substances and hairline treatment. Further, when the powder is spherical, it is particularly suitable for surface polishing. Further, the powder used in the present invention,
The size of the wire is not limited, but if the size of the wire is 0.02 to 2.5 mm in converted particle size, it is easy to put it in a container. Further, it is excellent in removing foreign substances on the surface. The size of the granular material is determined by a correlation with the surface treatment purpose of the wire, the diameter of the wire, and the like.
Further, the cutting allowance can be easily changed by changing the contact length between the granular material and the long product. Further, the granules may be a mixture of different types of granules. For example,
The particle size may be a mixture of a small particle size and a large particle size, or a mixture of three or more types of particle sizes. Further, for example, a mixture of a powder having a polygonal shape and a spherical shape may be mixed. As for the material, a soft and elastic powder or granule may be mixed with a polygonal granule having high hardness.

[0006] The container used in the present invention may be of any size, shape, and material as long as it can hold the powder and granules. However, in the case where the wire is continuously processed, it is desirable that there be a pair of openings before and after or above and below the container so that a long product can penetrate through the granular material. This is because the efficiency of surface treatment can be improved by continuous operation. Further, when pressure is applied to the granular material, the strength of the container needs to be increased accordingly. In this case, even if a chamber such as a chamber is provided in the container, the container itself may have an expandable and contractable structure. Further, a low-temperature inert gas or the like may be added to the inside of the container to prevent heating of the granular material.

In the present invention, a long product refers to a long product having a cross-sectional shape such as a circle, a corner, or an irregular shape. The material is
Materials such as steel, light alloys and composite materials are not limited. In addition, the long product suitable for the present invention has the same cross-sectional shape, and
There is no step surface in the axial direction. In particular, when pressure is applied, in the case of a long product having a step surface in the axial direction, powder particles accumulate in the concave portion in the shaded portion in the traveling direction,
This is because surface treatment cannot be performed.

[0008] In the present invention, it is possible to pass a plurality of long products at a time through the container containing the powdery material. In this case, two or more pairs of openings are provided in the container.

In the present invention, it is also possible to make the container expandable and contractable so that pressure is applied to the granular material so that a long product can pass therethrough. The magnitude of the pressure in this case is determined by the purpose of the surface treatment, the diameter of the long product, the size of the granular material, and the like. For example, in the case of surface roughening and hairline processing,
In the case where a polygonal particle of 0.02 to 2.5 mm is used and the converted diameter is 0.02 mm or more, it is preferable to set the force for pressing the particle to a surface pressure of 2000 Pa to 300 MPa. It is. When the pressure is lower than this pressure, it takes a long time for efficient surface treatment. When the pressure is higher than this pressure, problems such as an increase in the size of the device structure occur. Further, for example,
An oxide scale formed on the surface of a long product by the surface treatment;
No pressure is required in the case of a process for removing rust, adhesion or generated foreign matter. There is an advantage that the processing speed increases when pressure is applied.

Further, in the present invention, the surface treatment method can be repeated a plurality of times. In this case, two containers may be arranged in parallel. For example, it is possible to remove foreign matter attached when passing through the first container when passing through the second container. Also, for example, it is possible to reduce the surface roughness of a long product having large irregularities when passing through the first container when passing through the second container.
When such parallel containers are used, the size, shape, material, and the like of the powder and granules to be put in the container may be appropriately changed. Further, a plurality of powders may be mixed.

Further, the surface treatment in the present invention includes surface roughening, surface polishing, hairline treatment, treatment for removing oxide scale, rust, adhered or formed foreign matter generated on the surface of a long product, and the like.

[0012]

Embodiment 1 Hereinafter, an embodiment of the invention will be described with reference to the drawings. FIG. 1 is an example showing an embodiment of the present invention.

In FIG. 1, the side walls 2, 2 of the container 1 have work passing ports 3A, 3C, and have a converted particle size of 0.02 to 2.5.
a seal 5 made of a rubber plate (or brush) for efficiently preventing leakage of the powder 4 inside the work passage openings 3A, 3B, 3C filled with the powder 4 having a polygonal shape of 2 mm. There are five.

The container 1 includes a telescopic chamber chamber 6, a pressurizing chamber 7, which can pressurize the chamber chamber 6 from the outside, a loading chamber 8, and an air suction chamber 9. The chamber 6 and the loading chamber 8 are separated by a partition plate 10A having a work passage 3D, and the chamber 6 and the air suction chamber 9 are separated by a partition 10B having a work passage 3B. Is provided with the seal 5 described above.

The carry-in chamber 8 is communicably connected to a fine powder separating device (not shown) by a pipe 11A, and receives a supply of grindable particles from the fine powder separating device via this. The air suction chamber 9 is communicably connected to the fine powder separation device by a pipe 11B.
The lower part of the sedimentation box 12 communicates with a fine powder separation device (not shown). The ceiling 12A or the side wall 12B of the sedimentation box has a duct 13 communicating with a dust collector (not shown) communicating with a high-pressure blower (not shown).

The chamber 6 is made of an expandable and contractable material and shape. In the embodiment of the present invention, the material of the chamber chamber is rubber, and the shape thereof is a pipe shape or a plate shape. The pressurizing chamber 7 is made of rubber which can be expanded and contracted by pressurizing gas or liquid, and communicates with a pressurizing pump (not shown) via a pipe 13. In the embodiment, the chamber chamber 6 and the pressurizing chamber 7 have a single structure inside the container 1, but a plurality of chamber chambers and a plurality of pressurizing chambers 7 may be used alternately.

Hereinafter, description will be made with reference to FIGS. FIG. 2 shows an AA cross section of the container 1 before pressurization. FIG. 3 is a cross section after pressurization. The work W is in a container filled with the granular material 4, and allows the pressurized liquid or air to flow into the pressurizing chamber 7 to expand the pressurizing chamber 7. This expansion pressurizes the chamber 6 filled with the granular material 4 from the outside, and also pressurizes the surface of the granular material 4 and the work W via the expandable and contractible chamber chamber 6.

Hereinafter, the operation of the embodiment configured as described above will be described. In this state, the work W
Is driven by the driving operation of the work transport device (not shown) and passes through the pressurized granular material 4. At this time, the surface of the work W is hooked and polished by the polygonal and abrasive powder 4. Part of the granular material 4 moves in the direction of the partition plate 10B of the chamber 6 with the movement of the work W,
Most of it is kept in the chamber 6 by the seal 5, and a part is sucked into the air suction chamber 9 together with the suction air from the gap between the seal 5 and the work W.

The suction air is supplied by a dust collector (not shown).
It enters through the gap of the seal 5 at the work passage 3A of the container 1,
The air is sucked into the air suction chamber 9 from the work passage opening 3D of the entrance side partition plate 10A of the loading chamber 8, the chamber chamber 6, the inside of the granular material 4, and the work passage port 3B of the exit side partition plate 10B of the chamber room 6. That is, when the suction air passes through the granular material 4 in the chamber 6, the fine powder generated by the abrasion and the foreign matter and fine powder scraped off from the surface of the work W are also moved in the flow direction. Carry it in.

The powder and granules 4 carried into the air suction chamber 9,
Fine powder, foreign matter scraped off from the work, fine powder, etc., ride on the air and enter the sedimentation box 12 through the pipe 11B.

When the work W passes through the carry-in chamber 8, the powder 4 supplied from the fine-powder separation device via the pipe 11A is continuously contacted with the suction force and the suction air described above. To guide and supply. Chamber room 6
The powdered particles that come into contact with the workpiece W move at a speed lower than the transport speed of the workpiece W in the workpiece traveling direction while grinding or polishing the surface of the workpiece W. As described above, since the powder 4 circulates through the fine powder separator, the carry-in chamber 8 of the container 1, the chamber 6, the air suction chamber 9, the settling box 12, and the fine powder separator, the grinding or polishing by the powder is continuously performed. I can do it.

Since the fine powder of the granular material is collected by a dust collector (not shown), the total volume of the circulating granular material is reduced. There is a granular material supply device (not shown) for adjusting the amount, and a proper amount of new granular material is appropriately supplied from this device, so that the entire circulation capacity can be maintained.

Even when soft and elastic powder and granules are mixed with the powder and granules, the structure and operation are not changed.
When the granules are mixed with the granules, there is an advantage that the pressure is transmitted well and the surface of the work is uniformly pressed.

The apparatus for carrying out the surface treatment method of the present invention does not require a device for rotating a cutting tool, a grindstone, a brush or the like at a high speed, and does not generate harmful vibration. Further, since the surface treatment method according to the present invention has low noise, a soundproof box or the like is not required, and the apparatus can be extremely compact.

[0025]

As is clear from the above description, the present invention wraps the entire circumference of a continuous long product having the same cross-sectional shape with a polygonal powder having a surface hardness higher than that of the long product. Contact the surface of the long product with the granular material (selectively press),
Hold. In this state, only the long product is moved and the surface of the long product is ground, so the surface treatment can be performed faster and at lower cost compared to the method of grinding using tools such as a tool, whetstone and brush. it can. Furthermore, because it is a method of surface treatment with powder and granules without using a tool, whetstone, brush, etc.,
There is no limitation on the cross-sectional size of a long object having the same cross-sectional shape, and surface treatment can be performed even on a small-sized object that could not be handled by a processing method using a conventional cutting tool. As an incidental effect, since it is not necessary to rotate or reciprocate the blade or the like, power and the like can be significantly reduced. This surface treatment method has remarkable effects on energy saving, safety, running cost and environment.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view taken along the line AA before pressurization, showing the embodiment of the present invention.

FIG. 3 is a schematic cross-sectional view taken along the line AA after pressurization, showing the embodiment of the present invention.

[Explanation of symbols]

 1 Container 2 Side wall 3A, 3B Work passage port 4 Granular material 5 Seal 6 Chamber room 7 Pressurizing room 8 Carry-in room 9 Air suction room 10 Partition plate 11 Pipe 12 Settling box 13 Duct W work

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) B24C 11/00 B24C 11/00 Z

Claims (11)

[Claims] 1. A structure in which a granular material is filled in a container and a long product can pass through the container, and the long product passes through the container to contact the surface of the long product with the granular material. And a step of discharging fine particles or / and foreign matter shaved off from the surface of the workpiece by the gas flow flowing through the container to the outside of the container, and
A surface treatment method for a long product, comprising: 2. The method according to claim 1, wherein the granular material has a polygonal shape. 3. The method according to claim 1, wherein the size of the powder or granule is 0.1 in converted particle size.
The surface treatment method for a long product according to claim 1 or 2, wherein the length is from 02 to 2.5 mm. 4. The powder material according to claim 1, wherein the powder material is a mixture of different types of powder material.
The surface treatment method for a long product according to any one of the above. 5. The method according to claim 1, wherein a plurality of the long products are allowed to pass through a container containing the powder or granules at a time. Surface treatment method for long products. 6. The surface treatment method for a long product according to claim 1, wherein a pressure is applied to the granular material in the container to allow the long product to pass therethrough. 7. A surface treatment method for a long product, wherein the method according to claim 1 is repeated a plurality of times. 8. The surface treatment method for a long product according to claim 5, wherein the surface treatment is surface roughening. 9. The surface treatment method for a long product according to claim 5, wherein the surface treatment is surface polishing. 10. The surface treatment method for a long product according to claim 5, wherein the surface treatment is a hairline treatment. 11. The surface treatment according to claim 1, wherein the surface treatment is a treatment for removing oxide scale, rust, adhered or formed foreign matter generated on the surface of the long product. Surface treatment method for a long product according to the above.