KR20220066585A - Electropolishing Electrode for Coil Tube and Electropolishing Device including the same - Google Patents

Abstract

An electropolishing electrode for a coil tube according to embodiments of the present invention includes a conductive member, an outer skin member, and a reaction portion. The conductive member has flexibility and electrical conductivity. The outer skin material surrounds the conductive member and has no electrical conductivity. The reaction portion includes a conductive member with a predetermined length. The reaction portion electropolishes the inner surface of the coil tube while moving in the coil tube, which is a microtube. In addition, an electropolishing device including an electropolishing electrode for a coil tube according to other embodiments of the present invention includes the above-described electropolishing electrode for the coil tube. The electropolishing device including the electropolishing electrode for the coil tube according to the present invention, electropolishes the inner surface of the coil tube from one end to the other end of the coil tube, while slowly inserting the electropolishing electrode for the coil tube from one end to the other end of the coil tube, or slowly withdrawing the electropolishing electrode for the coil tube from one end to the other end of the coil tube. The present invention can enhance efficiency in electropolishing a metal coil tube.

Description

Electropolishing Electrode for Coil Tube and Electropolishing Device including the same

The present invention relates to an electrolytic polishing electrode for a coil tube and an electrolytic polishing apparatus including the same, and more particularly, to an electrolytic polishing electrode for a coil tube having a reaction unit suitable for electrolytic polishing of a metal coil tube, which is a tubule, and the same. It relates to an electropolishing device.

Electrolytic polishing is a method of polishing the metal surface. 1 is a view showing the principle of electrolytic polishing. When the electrolytic polishing method is described with reference to FIG. 1, in the electrolytic polishing method, the object to be polished in the electrolytic polishing solution in the treatment tank is connected to the anode (anode electrode) and the cathode (cathode electrode) is connected. The surface can be smoothed and polished by selectively dissolving the protrusions on the surface of the abrasive surface by allowing the elution of a special anode alloy or metal to occur under conditions suitable for polishing after being placed near the polishing surface in a non-contact manner.

As an electrolytic polishing solution (electrolyte), various types of electrolytes including NaNO ₃ , H ₂ SO ₄ +H ₃ PO ₄ are used. During electrolytic polishing, a thin oxide film, a passivation film, is formed on the metal surface, so corrosion resistance is greatly improved. has an increasing effect.

As such, according to the electrolytic polishing method, it is possible to improve the surface roughness by removing minute irregularities on the surface, there is no work-altered layer and work-hardened layer on the surface, the corrosion resistance is improved, and the shape of the object is limited Since there is no such thing, there is an advantage to be able to grind special shape products.

However, there is a problem in that the conventional electropolishing electrode and electrolytic polishing apparatus are suitable for a straight metal tube, and are not suitable for a coil-shaped metal tube (metal coil tube) in which one long tube is wound in multiple layers like a coil. Furthermore, when the coil-shaped metal tube has a very small diameter, there is a problem in that the electrolytic polishing efficiency of the inner surface of the metal tube is considerably low.

In addition, when using a conventional electrolytic polishing electrode and an electrolytic polishing device to electrolytically polish a coil-shaped metal tube (metal coil tube) that is a tube, there is a problem in that the electrolytic polishing takes a lot of time and cost.

Republic of Korea Patent Publication No. 10-2012-0087595 (published on August 07, 2012)

Therefore, an object of the present invention to solve the above-mentioned problems is to enable electrolytic polishing of the inner surface of a coil-shaped metal tube (metal coil tube) in which one long tube is wound in multiple layers like a coil, and electrolytic polishing processing An object of the present invention is to provide an electrolytic polishing electrode for a coil tube, which can improve efficiency, and an electrolytic polishing apparatus including the same.

In addition, an object of the present invention is to enable electrolytic polishing of the inner surface of the tube even when the diameter of the above-described coil-shaped metal tube (metal coil tube) is very small, and the electrolytic polishing processing efficiency is excellent. An object of the present invention is to provide an electrolytic polishing electrode and an electrolytic polishing apparatus including the same.

However, the problems to be solved by the present invention are not limited to the above objects, and may be variously expanded without departing from the spirit and scope of the present invention.

In order to solve the problem to be solved of the present invention, exemplary embodiments of the present invention implement the structure of various reaction parts to enable electrolytic polishing of the inner surface of a coil-shaped metal tube (metal coil tube) that is a tubule, a coil An electrolytic polishing electrode for a tube and an electrolytic polishing apparatus including the same are provided.

According to embodiments of the present invention, an electrolytic polishing electrode for a coil tube includes a conductive member, an outer skin material and a reaction unit. The conductive member has flexibility and electrical conductivity. The outer skin material surrounds the conductive member and has no electrical conductivity. The reaction unit includes a conductive member having a predetermined length. While the reaction part moves in the coil tube, which is a tubule, the inner surface of the coil tube is electrolytically polished.

According to an embodiment, the reaction unit further includes an outer skin material surrounding the conductive member having a predetermined length. A plurality of through-holes are formed in the outer skin material. A portion of the conductive member is exposed through the through hole, and the electrolyte is introduced into the plurality of through holes.

According to one embodiment, the reaction unit is formed of a portion in which the conductive member is wrapped with the outer skin material and a portion not covered with the outer skin material. A plurality of outer skin materials surrounding the conductive member in the reaction unit are plural, and adjacent outer skin materials among the plurality of outer skin materials are disposed to be spaced apart from each other by a predetermined interval.

According to an embodiment, a plurality of outer skin materials surrounding the conductive member in the reaction unit are plural, and heights of adjacent outer skin materials among the plurality of outer skin materials are the same or different.

According to an embodiment, the reaction unit includes a guide unit. The guide part is formed to protrude from the outer surface of the outer skin material surrounding the conductive member in the reaction part in a direction orthogonal to the longitudinal direction of the conductive member.

According to an embodiment, a plurality of outer skin materials surrounding the conductive member in the reaction unit are provided, and a plurality of guide parts are formed in each of the plurality of outer skin materials.

According to an embodiment, the guide portions adjacent to each other among the plurality of guide portions are disposed to be spaced apart from each other by a predetermined interval.

According to an exemplary embodiment, the total height of the outer skin material and the guide part surrounding the conductive member in the reaction unit is the same as or different from the total height of the outer skin material and the guide part surrounding the adjacent conductive member.

According to one embodiment, the reaction unit includes a short-circuit preventing member. The short-circuit prevention member accommodates a conductive member of a predetermined length that is not wrapped with an outer skin material.

According to one embodiment, the short-circuit prevention member is formed in a cylindrical or polygonal shape having a predetermined length, and has flexibility.

According to one embodiment, the short-circuit preventing member, one end face is blocked, the other end face is formed with a fitting hole in the center, a plurality of through-holes are formed on the outer peripheral surface in the longitudinal direction.

According to another embodiment of the present invention, an electrolytic polishing apparatus including an electrolytic polishing electrode for a coil tube includes the above-described electrolytic polishing electrode for a coil tube. The electrolytic polishing apparatus including the electrolytic polishing electrode for a coil tube of the present invention is for a coil tube while slowly inserting an electrolytic polishing electrode for a coil tube from one end to the other end of the coil tube, or from one end to the other end of the coil tube Electropolishing Electrolytic polishing the inner surface of the coil tube from one end to the other end of the coil tube while slowly withdrawing it after inserting the electrode.

Electrolytic polishing electrode for a coil tube according to embodiments of the present invention and an electrolytic polishing apparatus including the same, it is possible to electrolytically polish the inner surface of the metal coil tube while moving the structure of the reaction part in the coil-shaped metal tube (metal coil tube) It is implemented so as to be suitable for electrolytic polishing of a metal coil tube rather than a straight metal tube, thereby improving the electrolytic polishing efficiency of the metal coil tube.

In addition, even when the diameter of the metal coil tube is a very small tube, the inner surface of the tube can be electropolished and the electrolytic polishing efficiency can be improved.

In addition, it is possible to save time required for electropolishing the metal coil tube, which is a tube, and to reduce manufacturing cost.

However, the effects of the present invention are not limited to the above effects, and may be variously expanded without departing from the spirit and scope of the present invention.

1 is a view showing the principle of electrolytic polishing.
2 is a view showing a coil tube.
3 is a cross-sectional view of a first embodiment of an electropolishing electrode for a coil tube according to an embodiment of the present invention is disposed in the coil tube.
4 is a cross-sectional view taken along line AA of FIG. 3 .
5 is a cross-sectional view of a second embodiment of an electrolytically polished electrode rod for a coil tube according to embodiments of the present invention is disposed in the coil tube.
6 is a cross-sectional view taken along line BB of FIG. 5 .
7 is a cross-sectional view of a third embodiment of an electrolytically polished electrode rod for a coil tube according to embodiments of the present invention is disposed in the coil tube.
FIG. 8 is a cross-sectional view taken along CC of FIG. 7 , and (b) a cross-sectional view taken along DD of FIG. 7 .
9 is a view showing a fourth embodiment of an electrolytically polished electrode rod for a coil tube according to embodiments of the present invention.
FIG. 10 is a view showing an electrolytically polished electrode rod for a coil tube shown in FIG. 9 .
11 is a view showing the short-circuit preventing member shown in FIG.
12 is a view showing an electrolytic polishing apparatus according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Among the components of the present invention, specific descriptions thereof will be omitted so as not to obscure the gist of the present invention, which can be clearly understood by a person skilled in the art and can be easily reproduced according to the prior art.

In addition, the thickness or size of each component shown in the drawings is exaggerated, omitted, or schematically illustrated for convenience and clarity of description. In addition, the size of each component does not fully reflect the actual size.

Hereinafter, an electrolytic polishing electrode for a coil tube and an electrolytic polishing apparatus including the same according to embodiments of the present invention will be described.

2 is a view showing a coil tube.

Referring to FIG. 2 , an electrolytic polishing electrode for a coil tube according to embodiments of the present invention and an electrolytic polishing apparatus including the same are suitable for electrolytic polishing of the coil tube 100 shown in FIG. 2 . Here, the coil tube 100 means that one long tube is wound in multiple layers like a coil.

Specifically, the electrolytic polishing electrode for a coil tube according to the embodiments of the present invention and an electrolytic polishing apparatus including the same are electrolytic in a state in which one long tube (tube) wound in multiple layers like a coil is straight or similar to a straight line. Rather than polishing, electrolytic polishing can be effectively performed in the state of being wound in multiple layers like a coil.

The coil tube 100 has a hollow through-hole therein, and means a tube carrying a liquid (specifically, an electrolyte).

The coil tube 100 may be made of a metal material. The coil tube 100 includes any metal tube that requires electrolytic polishing, and specifically, the metal tube may be a stainless steel tube.

Therefore, the electrolytic polishing electrode for a coil tube according to embodiments of the present invention and an electrolytic polishing apparatus including the same may be used to electrolytically polish the metal coil tube 100 . Hereinafter, the term 'coil tube 100' naturally includes the coil tube 100 made of a metal material.

In addition, the electrolytic polishing electrode for a coil tube according to embodiments of the present invention and an electrolytic polishing apparatus including the same can be effectively applied to a tube having a very small diameter among the coil tube 100 . Specific specifications for this are shown below.

First, an electrolytic polishing electrode for a coil tube according to embodiments of the present invention will be described.

The electrolytic polishing electrode for the coil tube may be inserted into the coil tube 100 , and the inner surface of the coil tube 100 may be electrolytically polished while moving in the coil tube 100 .

The electropolished electrode rod for a coil tube may be, for example, a member, such as an electric wire, having a long length and a very small diameter compared to the length.

The length of the electropolishing electrode for the coil tube may be equal to or longer than the length of the coil tube 100 .

3 is a cross-sectional view of a first embodiment of an electrolytically polished electrode for a coil tube according to embodiments of the present invention disposed in a coil tube, and FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3 .

3 to 4 , the electropolishing electrode 200 according to the first embodiment includes a conductive member 210 , an outer skin material 220 , and a reaction unit 240 .

The conductive member 210 may be formed of a metal material having electrical conductivity. Here, the electrically conductive metal material may be copper. However, it is not limited to copper, and as long as it has electrical conductivity, various metal materials may be used.

The cross-sectional shape of the conductive member 210 (shape in a direction perpendicular to the longitudinal direction of the conductive member 210) is the cross-sectional shape of the coil tube 100 (in a direction orthogonal to the longitudinal direction of the coil tube 100) can correspond to the shape of ). Specifically, when the cross-sectional shape of the coil tube 100 is a cylindrical shape, the cross-sectional shape of the conductive member 210 may be circular.

The conductive member 210, when the coil tube 100 is a tubule, must be able to be inserted into the coil tube 100, so the cross-sectional diameter of the conductive member 210 is the coil tube 100 (specifically, the coil tube ( 100) of the cross-sectional diameter of the through hole).

Since the conductive member 210 has a small cross-sectional diameter and a length equal to or longer than the length of the coil tube 100, it may have flexibility. Accordingly, the electropolished electrode 200 may move along the coil tube 100 within the coil tube 100 .

The conductive member 210 may be electrically connected to a rectifier to be described below. When electricity is supplied to the conductive member 210 , a cathode electrode may be formed on the conductive member 210 .

The outer skin material 220 may surround the conductive member 210 . Since the outer skin 220 surrounds the conductive member 210 , an electrical short between the coil tube 100 and the conductive member 210 may be prevented from being shorted.

The outer skin material 220 may be formed of a non-metal material having no electrical conductivity. Here, the non-metallic material having no electrical conductivity may be an insulating material such as PVC (polyvinyl chloride) or rubber or enamel. However, it is not limited to PVC or insulating materials such as rubber or enamel, and if there is no electrical conductivity, various non-metallic materials may be used.

Since the outer skin material 220 is formed of a non-metal material having no electrical conductivity, while the coil tube 100 (specifically, the inner surface of the coil tube 100) is electrolytically polished, the conductive member 210 is made of a metallic coil tube ( 100) (specifically, the inner surface of the coil tube 100) can prevent an electrical short in contact.

In addition, the outer skin material 220 may be formed of a flexible (可撓性) material.

The distal end 230 of the electropolishing electrode 200 is surrounded by an outer skin material 220 . This is to prevent an electrical short in which the conductive member 210 comes into contact with the coil tube 100 .

The reaction part 240 is a part in which an electrochemical action occurs among the electropolishing electrode 200 .

The reaction part 240 is formed on a part of the electrolytic polishing electrode 200 . Specifically, the reaction unit 240 is formed from one end of the electrolytic polishing electrode 200 in the longitudinal direction of the electrolytic polishing electrode 200, to a predetermined length. In addition, the reaction unit 240 includes a conductive member 210 having a predetermined length in the longitudinal direction of the conductive member 210 .

The reaction unit includes an outer skin material surrounding the conductive member of the predetermined length.

A plurality of through holes 241 may be formed in the outer skin material 220 of the reaction unit 240 .

The through-hole 241 shown in FIGS. 3 and 4 may be formed in a direction in which a central axis of the through-hole 241 is perpendicular to the longitudinal direction of the conductive member 210 . In addition, a plurality of through-holes 241 may be formed on the outer peripheral surface of the outer skin member 220 surrounding the conductive member 210 .

The plurality of through-holes 241 may have the same size or diameter as or different from each other. In addition, distances between adjacent through-holes 241 among the plurality of through-holes 241 may be the same or different from each other.

The through hole 241 is formed such that a portion of the conductive member 210 is exposed. Specifically, the through hole 241 is formed so that a portion of the conductive member 210 is exposed at the bottom of the through hole 241 . That is, the conductive member must be exposed through the through hole.

The electrolyte introduced into the coil tube 100 flows into the through hole 241 formed in the outer skin material 220 of the reaction unit 240 , and comes into contact with the conductive member 210 exposed through the through hole 241 . At this time, when the cathode electrode is formed on the conductive member 210 due to the supply of electricity and the anode electrode is formed on the anode terminal 600 connected to the outside of the coil tube 100 , the reaction unit 240 (specifically, the reaction unit 240 ) ), an electrochemical action occurs in the exposed conductive member 210), and electrolytic polishing is performed around the inner surface of the coil tube 100 where the reaction unit 240 is located.

A plurality of through holes 241 may be formed in the outer skin material 220 of the reaction unit 240 . Here, the through-hole 241 may be formed in a direction in which the central axis of the through-hole 241 is perpendicular to the longitudinal direction of the electrolytic polishing electrode 200, and may be formed obliquely at a predetermined angle. The diameter of the through hole 241 may be the same or different from the outer surface of the outer skin member 220 until the conductive member 210 is exposed.

The through hole 241 may be formed using an awl, a drill, a laser, or the like, and may be formed using various other conventional methods.

Forming the through-hole 241 in a direction orthogonal to the longitudinal direction of the electropolishing electrode 200 is because it is convenient to manufacture the through-hole 241 and it is possible to reduce the manufacturing time.

In addition, forming the through hole 241 obliquely at a predetermined angle with respect to the longitudinal direction of the electrolytic polishing electrode 200 is to allow the electrolyte to smoothly pass through the through hole 241 . If the electrolyte does not smoothly flow into the through hole 241 , an electrochemical action is insignificantly generated in the reaction unit 240 , and thus electrolytic polishing is insignificantly performed on the inner surface of the coil tube 100 . This can be prevented by forming the through hole 241 obliquely at a predetermined angle as described above.

5 is a cross-sectional view of a second embodiment of an electrolytically polished electrode rod for a coil tube according to embodiments of the present invention disposed in a coil tube, and FIG. 6 is a cross-sectional view taken along line B-B of FIG. 5 .

5 to 6 , the electropolishing electrode rod 300 according to the second embodiment includes a conductive member 310 , an outer skin material 320 , and a reaction unit 340 .

The second embodiment of the electrolytic polishing electrode 300 shown in Figs. 5 to 6 is compared with the electrolytic polishing electrode 200 of the first embodiment shown in Figs. 3 to 4, the second embodiment of the electrolytic polishing electrode rod The conductive member 310 and the outer skin member 320 of 300 are the same as the conductive member 210 and the outer skin member 220 of the electrolytic polishing electrode rod 200 according to the first embodiment. Therefore, the detailed description of the conductive member 310 and the outer skin material 320 of the electrolytic polishing electrode rod 300 according to the second embodiment is the conductive member 210 and the outer skin material of the electrolytic polishing electrode rod 200 according to the first embodiment described above. The description of 220 will be replaced, and the reaction unit 340 will be described in detail below.

The reaction unit 340 is a portion in which an electrochemical action occurs in the electropolishing electrode 300 .

The reaction part 340 is formed on a part of the electrolytic polishing electrode 300 . Specifically, the reaction part 340 is formed from one end of the electrolytic polishing electrode 300 in the longitudinal direction of the electrolytic polishing electrode 300, to a predetermined length. In addition, the reaction unit 340 includes a conductive member 310 having a predetermined length in the longitudinal direction of the conductive member 310 .

The reaction unit 340 may be formed of a portion 341 in which the conductive member 310 is wrapped with the outer skin material 320 and a portion 341 not covered with the outer skin material 320 . In other words, in the reaction unit 340 , the outer skin material 320 may be formed to partially surround the conductive member 310 . Specifically, the outer skin material 320 of the reaction unit 340 may be formed to partially surround the conductive member 310 of the reaction unit 340 rather than covering the entirety. In the reaction unit 340 , the conductive member 341 that is not wrapped with the outer skin material 320 is exposed to the outside and comes into contact with the electrolyte.

In the reaction unit 340 , the outer skin material 320 (partially) surrounding the conductive member 310 may be plural.

Among the plurality of outer skin members 320 (partially) surrounding the conductive member 310 in the reaction unit 340, adjacent outer skin members 320 may be disposed to be spaced apart from each other by a predetermined interval.

The distance between the outer skin members 320 adjacent to each other among the plurality of outer skin members 320 (partially) surrounding the conductive member 310 in the reaction unit 340 may be the same or different from each other. Here, the distance between the outer skin members 320 adjacent to each other may be the same as the length of the conductive member 341 that is not wrapped with the outer skin member 320 in the reaction unit 340 .

The length of the conductive member 341 that is not wrapped with the outer skin material 320 in the reaction unit 340 is, when the electrolytically polished electrode rod 300 moves in the coil tube 100, is wrapped with the outer skin material 320. The unsupported conductive member 341 is limited to a predetermined length so as not to contact the inner surface of the coil tube 100 . This is to prevent an electrical short in which the conductive member 341 not wrapped with the outer skin material 320 comes into contact with the inner surface of the coil tube 100 .

Among the plurality of outer skin members 320 (partially) surrounding the conductive member 310 in the reaction unit 340 , the adjacent outer skin members 320 may have the same or different heights. Specifically, the height of any one of the outer skin materials 320 among the plurality of outer skin materials 320 (partially) surrounding the conductive member 310 in the reaction unit 340 is, the one of the outer skin members 320 and It may be the same as or different from the height of the neighboring outer skin member 320 . Here, the height of the outer skin member 320 refers to the distance from the outer surface of the conductive member 310 to the outer surface of the outer skin member 320 in a direction orthogonal to the longitudinal direction of the conductive member 310 .

The height of the outer skin material 320 surrounding the conductive member 310 in the reaction unit 340 is, when the electrolytic polishing electrode rod 300 moves in the coil tube 100, the outer skin material surrounding the conductive member 310 ( Even when the 320 comes into contact with the inner surface of the coil tube 100 , the electrolyte introduced into the coil tube 100 is limited to a predetermined height enough to smoothly move along the coil tube 100 .

The electrolyte introduced into the coil tube 100 comes into contact with the conductive member 341 that is not wrapped with the outer skin material 320 in the reaction unit 340 . At this time, when the cathode electrode is formed on the conductive member 310 due to the supply of electricity and the anode electrode is formed on the anode terminal 600 connected to the outside of the coil tube 100 , the reaction unit 340 (specifically, the reaction unit 340 ) ), an electrochemical action occurs in the conductive member 341 ) that is not wrapped with the outer skin material 320 , and electrolytic polishing is performed around the inner surface of the coil tube 100 where the reaction unit 340 is located.

The reaction unit 340 is a method of peeling off (removing) a part of the outer skin material 320 from one side of the electrolytic polishing electrode rod 300 in which the entire conductive member 310 is wrapped with the outer skin material 320 at various locations. , can be formed. In addition, the outer skin material 320 is peeled off (removed) by a predetermined length from one side of the electrolytic polishing electrode rod 300 in which the entire conductive member 310 is wrapped with the outer skin material 320, and a plurality of outer skin materials of a certain size are removed. The outer skin material 320 may be formed by inserting the 320 into the peeled portion and disposing the outer skin materials 320 adjacent to each other among the plurality of outer skin materials 320 to be spaced apart from each other by a predetermined interval.

The distal end 330 of the electropolishing electrode 300 is surrounded by an outer skin material 320 . This is to prevent an electrical short in which the conductive member 310 comes into contact with the coil tube 100 .

7 is a cross-sectional view of a third embodiment of an electropolishing electrode for a coil tube according to embodiments of the present invention disposed in a coil tube, and FIG. 8 is a cross-sectional view taken along line C-C of FIG. 7, (b) is a D-D cross-sectional view of FIG.

7 to 8 , the electropolishing electrode 400 according to the third embodiment includes a conductive member 410 , an outer skin material 420 , and a reaction unit 440 .

The third embodiment of the electropolishing electrode 400 shown in Figs. 7 to 8 is compared to the electrolytic grinding electrode 200 of the first embodiment shown in Figs. The conductive member 410 and the outer skin member 420 of 400 are the same as the conductive member 210 and the outer skin member 220 of the electrolytic polishing electrode 200 according to the first embodiment. Therefore, the detailed description of the conductive member 410 and the outer skin material 420 of the electrolytically polished electrode rod 400, which is the third embodiment, is the conductive member 210 and the outer skin material of the electrolytically polished electrode rod 200 of the first embodiment described above. It is replaced with the description of 220 , and the reaction unit 440 will be described in detail below.

The reaction unit 440 is a portion in which an electrochemical action occurs among the electropolishing electrode 400 .

The reaction part 440 is formed on a part of the electrolytic polishing electrode 400 . Specifically, the reaction part 440 is formed from one end of the electrolytic polishing electrode 400 in the longitudinal direction of the electrolytic polishing electrode 400, to a predetermined length. In addition, the reaction unit 440 includes a conductive member 410 having a predetermined length in the longitudinal direction of the conductive member 410 .

The reaction unit 440 may be formed of a portion in which the conductive member 410 is wrapped with the outer skin material 420 and a portion 441 not covered with the outer skin material 420 . In other words, in the reaction unit 440 , the outer skin material 420 may be formed to partially surround the conductive member 410 . Specifically, the outer skin material 420 of the reaction unit 440 may be formed to partially cover the conductive member 410 of the reaction unit 440 rather than covering the entirety. In the reaction unit 440 , the conductive member 441 that is not wrapped with the outer skin material 420 is exposed to the outside and comes into contact with the electrolyte.

In the reaction unit 440 , the outer skin material 420 (partially) surrounding the conductive member 410 may be plural.

Among the plurality of outer skin materials 420 (partially) surrounding the conductive member 410 in the reaction unit 440, adjacent outer skin members 420 may be disposed to be spaced apart from each other by a predetermined interval.

The distance between the outer skin members 420 adjacent to each other among the plurality of outer skin members 420 (partially) surrounding the conductive member 410 in the reaction unit 440 may be the same or different from each other. Here, the distance between the outer skin members 420 adjacent to each other may be the same as the length of the conductive member 441 that is not wrapped with the outer skin member 420 in the reaction unit 440 .

The length of the conductive member 441 that is not wrapped with the outer skin material 420 in the reaction unit 440 is, when the electrolytic polishing electrode 400 is moved in the coil tube 100, is wrapped with the outer skin material 420. The unsupported conductive member 441 is limited to a predetermined length so as not to contact the inner surface of the coil tube 100 . This is to prevent an electrical short in which the conductive member 441 not wrapped with the outer skin material 420 comes into contact with the inner surface of the coil tube 100 .

The reaction unit 440 may include guide units 421 and 422 . Specifically, the reaction unit 440 protrudes in a direction orthogonal to the longitudinal direction of the conducting member 410 from the outer surface of the outer skin material 420 (partially) surrounding the conducting member 410 in the reaction unit 440. It may include guide portions 421 and 422 formed by being. The guide parts 421 and 422 exist only in the reaction part 440 of the electropolishing electrode 400 .

In the present invention, the outer skin material 420 (partially) surrounding the conductive member 410 in the reaction unit 440, and guide portions 421 and 422 formed to protrude from the outer surface of the outer skin material 420, It is called 'outer skin material 420 including guide parts 421 and 422 (or outer skin material 420 including guide parts 421 and 422)'. Here, when the guide parts 421 and 422 are fastened to the conductive member 410 so that the outer skin member 420 surrounds the conductive member 410 , the conductive member 410 is formed from the outer surface of the outer skin member 420 . It may be formed to protrude in a direction orthogonal to the longitudinal direction.

The guide portions 421 and 422 may be integrally formed with the outer skin material 420 , and the material of the guide portions 421 and 422 may be the same as that of the outer skin material 420 .

A plurality of guide parts 421 and 422 may be formed on each of the plurality of outer skin materials 420 (partially) surrounding the conductive member 410 in the reaction part 440 (refer to FIG. 8 ).

The guide parts 421 and 422 adjacent to each other among the plurality of guide parts 421 and 422 may be disposed to be spaced apart from each other by a predetermined interval. Specifically, any one of the guide portions 421 and 422 of the plurality of guide portions 421 and 422 and the guide portions 421 and 422 adjacent to the one of the guide portions 421 and 422 are separated by a predetermined interval. may be spaced apart from each other. Therefore, a predetermined space may be formed between the guide portions 421 and 422 adjacent to each other, and the electrolyte may move into the space.

The distance between the guide parts 421 and 422 adjacent to each other among the plurality of guide parts 421 and 422 may be the same or different from each other. Accordingly, the predetermined space formed between the adjacent guide parts 421 and 422 may be the same or different from each other.

The upper surfaces of the guide parts 421 and 422 may be in contact with the inner surface of the coil tube 100 . Here, the strength of the contact is very weak, and the electrolytic polishing electrode 400 may move in the coil tube 100 in a state in which the upper surfaces of the guide parts 421 and 422 are in contact with the inner surfaces of the coil tube 100 . In other words, the upper surfaces of the guide parts 421 and 422 may slide along the inner surface of the coil tube 100 while in contact with the inner surface of the coil tube 100 .

Referring back to FIG. 7 , the entire height of the outer skin material 420 surrounding the conductive member 410 in the reaction unit 440 and the guide portions 421 and 422 formed to protrude from the outer surface of the outer skin material 420 ( M) may be equal to or slightly smaller than the distance from the outer surface of the conductive member 410 to the inner surface of the coil tube 100 in a direction orthogonal to the longitudinal direction of the conductive member 410 . Here, the total height M of the outer skin member 420 and the guide parts 421 and 422 is the guide parts 421 and 422 from the outer surface of the conductive member 410 in a direction orthogonal to the longitudinal direction of the conductive member 410. is the distance to the top surface of

The total height M of the outer skin material 420 and the guide parts 421 and 422 surrounding the conductive member 410 in the reaction unit 440 is the outer skin material 420 surrounding the neighboring conductive member 410. and the total height of the guide portions 421 and 422 may be the same as or different from each other.

The reaction unit 440 includes a plurality of 'outer skin materials 420 including guide parts 421 and 422' of a certain size, and after the last 'outer skin material 420 including guide parts 422' The thickness (m) of the outer skin material 420 is smaller than the overall height (M) of the outer skin material 420 and the guide parts 421 and 422 surrounding the conductive member 410 . This is to allow the electrolyte to move smoothly within the coil tube 100 .

The electrolyte introduced into the coil tube 100 passes through a predetermined space formed between the guide parts 421 and 422 adjacent to each other of the reaction unit 440, and is not wrapped in the outer skin material 420 in the reaction unit 440. It comes into contact with the non-conducting member 441 . At this time, when the cathode electrode is formed on the conductive member 410 due to the supply of electricity and the anode electrode is formed on the anode terminal 600 connected to the outside of the coil tube 100 , the reaction unit 440 (specifically, the reaction unit 440 ) ), an electrochemical action occurs in the conductive member 441 ) that is not wrapped with the outer skin material 420 , and electrolytic polishing is performed around the inner surface of the coil tube 100 where the reaction unit 440 is located.

The reaction unit 440 peels off (removes) the outer skin material 420 by a predetermined length from one side of the electrolytic polishing electrode rod 400 in which the entire conductive member 410 is wrapped with the outer skin material 420, and has a predetermined size. A plurality of 'outer skin material 420 including guide parts 421 and 422' of )' may be formed by arranging adjacent 'outer skin members 420 including guide parts 421 and 422' to be spaced apart from each other by a predetermined distance.

The front end 430 of the electropolishing electrode 400 is wrapped with an outer skin material. This is to prevent an electrical short in which the conductive member contacts the coil tube 100 .

9 is a view showing a fourth embodiment of an electrolytic polishing electrode for a coil tube according to embodiments of the present invention, FIG. 10 is a view showing an electrolytic polishing electrode for a coil tube shown in FIG. 9, and FIG. It is a view showing the short-circuit preventing member shown in 9.

9 to 11 , the electropolishing electrode rod 500 according to the fourth embodiment includes a conductive member 510 , an outer skin material 520 , and a reaction unit.

The fourth embodiment of the electropolishing electrode 500 shown in FIGS. 9 to 11 is compared to the electrolytic polishing electrode 200 of the first embodiment shown in FIGS. 3 to 4 , the electrolytic polishing electrode of the fourth embodiment. The conductive member 510 and the outer skin member 520 of 500 are the same as the conductive member 210 and the outer skin member 220 of the electrolytic polishing electrode rod 200 according to the first embodiment. Therefore, the detailed description of the conductive member 510 and the outer skin material 520 of the electrolytic polishing electrode rod 500, which is the fourth embodiment, is the conductive member 210 and the outer skin material of the electrolytic polishing electrode rod 200 according to the first embodiment described above. It is replaced with the description of 220, and the reaction part will be described in detail below.

The reaction part is a part in which an electrochemical action occurs in the electropolishing electrode 500 .

The reaction unit is formed on a part of the electropolishing electrode 500 . Specifically, the reaction part is formed from one end of the electrolytic polishing electrode 500 in the longitudinal direction of the electrolytic polishing electrode 500 to a predetermined length. In addition, the reaction unit includes a conductive member 510 having a predetermined length in the longitudinal direction of the conductive member 510 .

The reaction part is a part corresponding to the conductive member 510 of a predetermined length not wrapped with the outer skin material 520 from one end of the electrolytic polishing electrode rod 500 in the longitudinal direction of the electrolytic polishing electrode rod 500, and the reaction part It includes a short-circuit prevention member 530 for accommodating the conductive member 510 of a predetermined length that is not wrapped with the above-described outer skin member 520 .

Specifically, from one end of the electropolishing electrode 500, a predetermined length in the longitudinal direction of the electrolytic polishing electrode 500 is not wrapped with the outer skin material 520, and this part is where the conductive member 510 is exposed to the outside. exposed and may come into contact with the electrolyte.

A fastening groove 521 may be formed on one side of the outer skin material 520 surrounding the conductive member 510 in the electrolytic polishing electrode rod 500 . The fastening groove 521 may be formed in a direction perpendicular to the longitudinal direction of the electropolishing electrode 500 . The fastening portion 534 of the short-circuit preventing member 530 may be inserted into the fastening groove 521 .

The short-circuit prevention member 530 may be formed in a cylindrical or polygonal shape having a predetermined length. Here, the predetermined length may be longer than the length of the conductive member 510 that is not wrapped with the outer skin material 520 in the electropolishing electrode 500 .

The short-circuit prevention member 530 can accommodate the conductive member 510 that is not wrapped with the above-described outer skin material 520 , and one end surface 531 of the short-circuit prevention member 530 is blocked, and the other end surface 532 is closed. ) has a fitting hole 533 formed in the center. The end forming the fitting hole 533 in the other end surface 532 of the short-circuit prevention member 530 is called a fastening part 534, and the fastening part 534 is in the fastening groove 521 formed in the outer skin member 520. is inserted

The reason why the end surface 531 of one side of the short-circuit prevention member 530 is blocked is to prevent an electrical short in which the conductive member 510 accommodated in the short-circuit prevention member 530 comes into contact with the inner surface of the coil tube 100 .

The short-circuit prevention member 530 may have a plurality of through-holes 535 formed on the outer peripheral surface in the longitudinal direction. The shape of the through hole 535 is not limited to a specific shape, and the size of the through hole 535 is not limited to a specific size as long as the electrolyte can move.

The short-circuit prevention member 530 may be formed of a non-metal material having no electrical conductivity. Here, the non-metallic material having no electrical conductivity may be an insulating material such as PVC or rubber or enamel. However, it is not limited to PVC or insulating materials such as rubber or enamel, and if there is no electrical conductivity, various non-metallic materials may be used.

Since the short-circuit prevention member 530 is formed of a non-metallic material without electrical conductivity, during electrolytic polishing of the coil tube 100 (specifically, the inner surface of the coil tube 100), the conductive member in the short-circuit prevention member 530 ( It is possible to prevent an electrical short in which the 510 comes into contact with the metallic coil tube 100 (specifically, the inner surface of the coil tube 100 ).

In addition, the short-circuit prevention member 530 may have flexibility so that the electrolytic polishing electrode 500 can move within the coil tube 100 . Specifically, it may be formed of a flexible material.

The electrolyte introduced into the coil tube 100 passes through the plurality of through-holes 535 formed in the short-circuit prevention member 530 of the reaction unit, and conducts not wrapped with the outer skin material 520 in the short-circuit prevention member 530 . It comes into contact with the member 510 . At this time, when the cathode electrode is formed on the conductive member 510 due to the supply of electricity and the anode electrode is formed on the anode terminal 600 connected to the outside of the coil tube 100 , the reaction unit (specifically, the outer skin material 520 of the reaction unit) ), an electrochemical action occurs in the conductive member 510 ), and electrolytic polishing is performed around the inner surface of the coil tube 100 where the reaction part is located.

In the reaction unit, the outer skin material 520 is peeled off (removed) by a predetermined length from one side of the electrolytic polishing electrode rod 500 in which the entire conductive member 510 is wrapped with the outer skin material 520, and the outer skin material 520 is removed. A method of inserting the removed conductive member 510 into the fitting hole 533 of the short-circuit preventing member 530, and inserting the conductive member 510 from which the outer skin material 520 is removed into the short-circuit preventing member 530. , can be formed. At this time, by applying a predetermined force to the fastening groove 521 formed in the outer skin material 520, the fastening part 534 formed on the other end surface of the short-circuit preventing member 530 is fitted, the short-circuit preventing member 530 is electropolished electrode rod ( 500) can be fixed.

Hereinafter, an electrolytic polishing apparatus including the electrolytic polishing electrode rods 200, 300, 400, and 500 for a coil tube according to the above-described embodiments of the present invention will be described.

According to other embodiments of the present invention, an electrolytic polishing apparatus including an electrolytic polishing electrode for a coil tube is an electrolytic polishing electrode for a coil tube according to the first to fourth embodiments described above (200, 300, 400, 500). includes

12 is a view showing an electrolytic polishing apparatus according to another embodiment of the present invention.

Referring to FIG. 12 , an electrolytic polishing apparatus including an electrolytic polishing electrode 200, 300, 400, and 500 for a coil tube according to other embodiments of the present invention is an anode terminal 600, a rectifier , a winding machine, an electrolyte supply tank, an electrolyte recovery tank, a pump and a valve.

The rectifier may be electrically connected to the anode terminal 600 and the electrolytically polished electrode rods 200, 300, 400, and 500 for the coil tube, and the anode terminal 600 and the electrolytically polished electrode rod for the coil tube 200, 300, 400 , 500) can be supplied with electricity.

One or more anode terminals 600 may be electrically connected to the coil tube 100 .

When electricity is supplied to the anode terminal 600 from the rectifier, an anode electrode may be formed in the anode terminal 600 . And, when electricity is supplied to the conductive members 210, 310, 410, and 510 of the electrolytically polished electrode rods 200, 300, 400, and 500 for the coil tube from the rectifier, the conductive members 210, 310, 410, and 510 are included. A cathode electrode is formed in the reaction part.

Electropolishing electrode rods 200, 300, 400, and 500 for coil tube may be installed in the winding machine.

Using a winding machine, the electrolytically polished electrode rods 200 , 300 , 400 , and 500 for the coil tube may be inserted or removed from one end of the coil tube 100 to the other end. By controlling the rotation speed of the winding machine, it is possible to control the moving speed of the electropolishing electrode rods 200, 300, 400, and 500 for the coil tube.

The electrolyte supply tank is a reservoir for accommodating the electrolyte. The electrolyte discharged from the electrolyte supply tank may be introduced into the coil tube 100 .

The electrolyte supply tank may be connected to one end of the coil tube 100 by an electrolyte supply line, and the other end of the coil tube 100 and the electrolyte recovery tank may be connected to each other by an electrolyte recovery line.

The electrolyte discharged from the electrolyte supply tank moves along the electrolyte supply line and flows into one end of the coil tube 100 , and the electrolyte introduced into the coil tube 100 moves along the coil tube 100 and moves along the coil tube 100 . The electrolyte discharged to the other end of the coil tube 100 moves along the electrolyte recovery line and flows into the electrolyte recovery tank.

A pump and a valve may be disposed in the electrolyte supply line connecting the electrolyte supply tank and the coil tube 100 . Here, the valve may be a flow control valve and/or an on/off valve.

By the operation of the pump, the electrolyte stored in the electrolyte supply tank may move to the coil tube 100 . The flow control valve may control the flow rate of the electrolyte flowing into the coil tube 100 . The opening/closing valve may open and close the electrolyte supply line to supply or block the electrolyte to the coil tube 100 .

The operating principle of the electrolytic polishing apparatus including the electrolytic polishing electrode rods 200, 300, 400, and 500 for a coil tube according to other embodiments of the present invention will be briefly described as follows.

Electrolytic polishing for coil tube from one end to the other end of the coil tube 100 while slowly inserting the electrode electrode 200, 300, 400, 500 for electrolytic polishing for the coil tube from one end to the other end of the coil tube 100 After inserting the electrodes 200 , 300 , 400 , and 500 , the inner surface of the coil tube 100 may be electrolytically polished from one end of the coil tube 100 to the other end while slowly withdrawing it. During the electrolytic polishing of the inner surface of the coil tube 100 from one end to the other end of the coil tube 100 using the above-described electropolishing electrode rods 200, 300, 400, and 500 for the coil tube, pump operation and valve The cathode electrode is applied to the conductive members 210, 310, 410, 510 of the electrolytic polishing electrode rods 200, 300, 400, 500 for the coil tube by controlling the electrolyte to flow in the coil tube 100, and supplying electricity from the rectifier. It should be in a state in which the anode electrode is formed on the anode terminal 600 connected to the outside of the coil tube 100 .

Therefore, the electrolytic polishing electrode for a coil tube according to embodiments of the present invention and an electrolytic polishing apparatus including the same are suitable for electrolytic polishing of the metallic coil tube 100 .

In addition, the electrolytic polishing electrode for a coil tube according to embodiments of the present invention and an electrolytic polishing apparatus including the same can be effectively applied to a tube having a small diameter among the coil tube 100 . In particular, it is possible to effectively perform electrolytic polishing for the specifications shown in [Table 1] below.

coil tube
outside diameter coil tube
thickness Cross-sectional diameter of electropolished electrode Diameter of the through hole formed in the outer skin material of the reaction part of the electropolishing electrode rod (Example 1) 1/8''
(3.175mm) 0.02''
(0.5mm) 0.7mm 0.5mm 3/16''
(4.76mm) 0.035''
(0.89mm) 1mm 0.7mm

The electrolytic polishing electrode rod for a coil tube according to the above-described embodiments of the present invention and an electrolytic polishing apparatus including the same are implemented to enable electrolytic polishing of the inner surface of the metal coil tube while moving the structure of the reaction part in the metal coil tube, It is suitable for electrolytic polishing of a metal coil tube rather than a straight metal tube, and the electrolytic polishing efficiency of the metal coil tube can be improved.

In addition, even when the diameter of the metal coil tube is a very small tube, the inner surface of the tube can be electrolytically polished and the electrolytic polishing efficiency can be improved.

In addition, it is possible to save time required for electropolishing the metal coil tube, which is a tube, and to reduce manufacturing cost.

Features, structures, effects, etc. described in the above embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, features, structures, effects, etc. illustrated in each embodiment can be combined or modified for other embodiments by those of ordinary skill in the art to which the embodiments belong. Accordingly, the contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

In addition, although the embodiment has been mainly described in the above, this is only an example and does not limit the present invention, and those of ordinary skill in the art to which the present invention pertains in the range that does not deviate from the essential characteristics of the present embodiment. It will be appreciated that various modifications and applications not illustrated are possible. That is, each component specifically shown in the embodiment can be implemented by modification. And differences related to such modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

100: coil tube
200, 300, 400, 500: Electropolished electrode rod for coil tube
210, 310, 410, 510: conductive member
220, 320, 420, 520: outer skin material
240, 340, 440: reaction unit
530: short-circuit prevention member
600: cathode terminal

Claims (12)

a conductive member having flexibility and electrical conductivity;
an outer skin material surrounding the conductive member and having no electrical conductivity; and
Including; a reaction unit including the conductive member of a predetermined length;
An electrolytic polishing electrode for a coil tube, which electrolytically polishes the inner surface of the coil tube while the reaction part moves within the coil tube, which is a tubule. The method of claim 1,
The reaction unit further comprises the outer skin material surrounding the conductive member of the predetermined length,
A plurality of through-holes are formed in the outer skin material,
A portion of the conductive member is exposed through the through-hole, and the electrolyte is introduced into the plurality of through-holes, an electrolytic polishing electrode for a coil tube. The method of claim 1,
The reaction part is formed of a portion in which the conductive member is wrapped with the outer skin material and a portion not covered with the outer skin material,
A plurality of outer skin materials surrounding the conductive member in the reaction unit are plural, and adjacent outer skin materials among the plurality of outer skin materials are disposed to be spaced apart from each other by a predetermined interval. 4. The method of claim 3,
A plurality of outer skin materials surrounding the conductive member in the reaction unit are plural, and the heights of adjacent outer skin materials among the plurality of outer skin materials are the same or different, the electropolishing electrode rod for a coil tube. 4. The method of claim 3,
The reaction part includes a guide part,
The guide part is formed to protrude from the outer surface of the outer skin material surrounding the conductive member in the reaction part in a direction orthogonal to the longitudinal direction of the conductive member. 6. The method of claim 5,
In the reaction unit, the plurality of outer skin materials surrounding the conductive member are plural, and a plurality of guide portions are formed in each of the plurality of outer skin materials. 7. The method of claim 6,
Adjacent guide portions of the plurality of guide portions are disposed to be spaced apart from each other at a predetermined interval, an electrolytic polishing electrode for a coil tube. 4. The method of claim 3,
The total height of the outer skin material and the guide part surrounding the conductive member in the reaction part is the same as or different from the total height of the outer skin material and the guide part surrounding the neighboring conductive member, the electrolytic polishing electrode for a coil tube. The method of claim 1,
The reaction unit includes a short-circuit prevention member,
The short-circuit prevention member accommodates the conductive member of a predetermined length not wrapped with the outer skin material, an electrolytic polishing electrode for a coil tube. 10. The method of claim 9,
The short-circuit prevention member is formed in a cylindrical or polygonal shape having a predetermined length, and having flexibility, an electrolytic polishing electrode for a coil tube. 11. The method of claim 10,
The short-circuit prevention member, one end face is blocked, the other end face is formed with a fitting hole in the center, a plurality of through holes are formed on the outer peripheral surface in the longitudinal direction, an electrolytic polishing electrode for a coil tube. An electrolytic polishing apparatus comprising the electrolytic polishing electrode for a coil tube according to any one of claims 1 to 11,
one or more anode terminals electrically connected to the coil tube; and
and a rectifier for supplying electricity to the anode terminal to form an anode electrode on the anode terminal, and supplying electricity to a conductive member of the electrolytic polishing electrode for the coil tube to form a cathode electrode in the reaction unit; and ,
While slowly inserting the electrolytic polishing electrode for the coil tube from one end to the other end of the coil tube, or inserting the electrolytic polishing electrode for the coil tube from one end to the other end of the coil tube and then slowly withdrawing it, the coil tube An electrolytic polishing apparatus comprising an electrolytic polishing electrode for a coil tube, which electrolytically polishes the inner surface of the coil tube from one end to the other end of the.

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