JP6940063B2 - Surface treatment equipment and surface treatment method - Google Patents

Description

The present invention relates to a surface treatment apparatus and a surface treatment method for passing an electric current through a work.

As a countermeasure against corrosion and wear on the work surface, a surface treatment is performed in which an electric current is passed through the work to form a film on the work surface. Then, as the surface treatment apparatus at that time, for example, the apparatus disclosed in Patent Documents 1 to 3 is used.

Japanese Unexamined Patent Publication No. 54-24235 Japanese Unexamined Patent Publication No. 2000-110036 Japanese Unexamined Patent Publication No. 10-237697

As one of the surface treatment devices for passing an electric current through a work having holes, a male screw is inserted into the hole made in the work, and the tip of the inserted male screw is provided in the surface treatment device and is screwed to the threaded portion of the work. There is a device that fixes the device and allows current to flow through the threaded part of the screw. However, in the above-mentioned surface treatment device, when the male screw is screwed to the female screw portion, both the work and the screw are held by hand at the same time, and the hole of the work and the hole of the female screw portion are aligned. It took time.

Further, in the above surface treatment apparatus, when a current is passed through the work, the area of the contact portion between the male screw and the female screw and the area of the contact portion between the male screw and the work are small, resulting in poor energization. As a result, sparks may occur at the contact portion between the male screw and the female screw or the contact portion between the male screw and the work, and the surface treatment device or the work may be melted.

Therefore, it is an object of the present application to provide a surface treatment apparatus and a surface treatment method that realizes reliable energization of the work while reducing the work man-hours for the work attachment / detachment work.

In order to solve the above problems, in the present invention, the surface treatment apparatus is provided with a sleeve member capable of increasing the diameter.

Specifically, the present invention is a surface treatment device for passing an electric current through a work having a hole, a hanger connected to a power source, an insertion member connected to the hanger body and inserted into the hole of the work, and an insertion member. The hanger, the insertion member, and the sleeve member are conductive, comprising a sleeve member that covers the outer peripheral surface of the work and can expand the diameter to the inner peripheral surface of the hole of the work, and a diameter increasing means for expanding the diameter of the sleeve member.

With such a surface treatment device, the work can be hooked on the insertion member connected to the hanger through a hole provided in the work. When the sleeve member covering the outer peripheral surface of the insertion member is increased in diameter by the diameter increasing means, the outer peripheral surface of the sleeve member comes into contact with the inner peripheral surface of the hole of the work, and the inner peripheral surface of the hole of the work has a diameter. By keeping pushing in the direction, the work is fixed to the hanger. That is, when attaching the work, it is not necessary to hold both the work and the screw by hand at the same time, and it is not necessary to align the hole of the work with the hole of the female screw portion. Therefore, it is possible to reduce the work man-hours for attaching / detaching the workpiece. Further, since the hanger, the insertion member connected to the hanger, and the sleeve member covering the outer peripheral surface of the insertion member have conductivity, the diameter of the sleeve member is expanded, and the outer peripheral surface of the sleeve member is the inner circumference of the hole of the work. When it comes into contact with the surface, current flows from the power supply to the work through the hanger, insertion member, and sleeve member.

Further, the diameter-expanding means includes a diameter-expanding member having a tapered shape portion, and the diameter-expanding member is inserted into the inside of the sleeve member from the outside of both ends of the sleeve member, and when the diameter-expanding member is inserted, the inclined surface of the tapered shape portion is inserted. , It is a means for pushing the inner peripheral surface of the sleeve member to increase the diameter, and the diameter increasing member may have conductivity.

With such a diameter-expanding means, the sleeve member can be expanded in diameter by using the diameter-expanding member, and the work can be fixed to the hanger. Furthermore, since the diameter-expanding member has conductivity, when the diameter-expanding member is in contact with the insertion member or the hanger, a current flows through the diameter-expanding member itself, and a current flows from the diameter-expanding member to the sleeve member. It flows.

Further, in the diameter expanding means, the insertion member can rotate around the insertion direction, and the surface of the insertion member has a first surface portion whose distance from the central axis of rotation is longer than the length of the inner radius of the sleeve member. A second surface portion whose distance from the central axis of rotation is shorter than the length of the inner radius of the sleeve member is provided, and the first surface portion and the second surface portion are provided on the surface of the insertion member in the rotation direction. It may be provided alternately, and when the insertion member is rotated, the first surface portion may be a means for pushing the inner peripheral surface of the sleeve member to increase the diameter.

With such a diameter-expanding means, the diameter of the sleeve member can be expanded without providing the diameter-expanding member. Therefore, the number of parts can be reduced and the cost can be suppressed.

Further, the outer peripheral surface of the sleeve member may have a surface portion having the same curvature as the inner peripheral surface of the hole of the work. With such a sleeve member, the outer peripheral surface of the sleeve member and the inner peripheral surface of the hole of the work come into surface contact with each other. Therefore, the work can be reliably energized from the sleeve member, and the generation of sparks at the contact portion between the outer peripheral surface of the sleeve member and the inner peripheral surface of the work is suppressed.

Further, the inner surface near both ends of the sleeve member is provided with a tapered shape portion, and the inclination angle of the tapered shape portion may be equal to the inclination angle of the tapered shape portion of the diameter-expanding member. In the case of such a sleeve member, the tapered portion of the sleeve member and the diameter-expanding member are in surface contact with each other, and sparks occur at the contact portion between the tapered portion of the sleeve member and the tapered portion of the diameter-expanding member. Occurrence is suppressed.

Further, the sleeve member may be divided in the circumferential direction. With such a sleeve member, the outer peripheral surface is not deformed when the diameter is increased.

Further, the sleeve members may be bundled by a member having acid resistance and elasticity. Such a member having acid resistance and elasticity can be reused even when it is immersed in an acidic solution during surface treatment.

Further, the insertion direction of the insertion member may be diagonally upward with respect to the horizontal plane. With such an insertion member, when the insertion member is inserted into the hole of the work, the work does not naturally fall off from the hanger, so that the burden of the work attachment / detachment work can be reduced.

The present invention can also be grasped from the aspect of the method. That is, the present invention is, for example, a surface treatment method in which a current is passed through a work having a hole, and an insertion step in which an insertion member connected to a hanger connected to a power source is inserted into a hole in the work, and an insertion member The sleeve member that covers the outer peripheral surface and can be expanded to the inner peripheral surface of the hole of the work is provided with a diameter-expanding step in which the diameter is expanded by the diameter-expanding means, and the hanger, the insertion member, and the sleeve member have conductivity. , It may be a surface treatment method.

Further, the present invention may be, for example, a surface treatment method in which the outer peripheral surface of the sleeve member has a surface portion having the same curvature as the inner peripheral surface of the hole of the work.

The above-mentioned surface treatment apparatus and surface treatment method can reduce the man-hours for the work attachment / detachment work and can realize reliable energization of the work.

FIG. 1 is a configuration diagram of a surface treatment apparatus according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line AA showing a cross section of the insertion portion of FIG. FIG. 3 is a structural explanatory view of the sleeve and the diameter-expanding member. FIG. 4 is a diagram showing an outline of hooking the work on the hanger. FIG. 5 is an explanatory view when fixing the work to the hanger. FIG. 6 is a cross-sectional view taken along the line BB showing the movement of the sleeve of FIG. 4 when the diameter of the sleeve is expanded in the first hole of the work. (A) is the state of the sleeve in the first hole before twisting the male thread type shaft, and (B) is the state of the expanded sleeve in the first hole after twisting the male thread type shaft. Indicates the state. FIG. 7 is an overall configuration diagram when the surface treatment apparatus according to the present invention is used for anodizing treatment. FIG. 8 shows a modified example of a sleeve having alternating grooves. FIG. 9 is a cross-sectional view of a structure in which the head of a male screw type shaft is connected to a hanger. FIG. 10 is a schematic view of inserting the diameter-expanding member inside the sleeve using a lever. FIG. 11 is a partially enlarged view of the surface treatment apparatus according to the second embodiment of the present invention. FIG. 12 is a cross-sectional view taken along the line CC of FIG. (A) is a cross-sectional view before the sleeve diameter is expanded, and (B) is a cross-sectional view after the sleeve diameter is expanded. FIG. 13 is a configuration diagram when the head of the male screw type shaft is connected to the hanger.

Hereinafter, embodiments of the present invention will be described. The embodiments shown below are examples of embodiments of the present invention, and the technical scope of the present invention is not limited to the following embodiments.

<First Embodiment>
FIG. 1 is a block diagram of a surface treatment apparatus according to an embodiment of the present invention. The surface treatment apparatus 100 is used for surface treatment such as anodizing treatment and plating treatment in which an electric current is passed. The surface treatment device 100 shown in FIG. 1 includes a hanger 1 connected to a power source, an insertion portion 4 connected to the hanger 1 and inserted into the first hole 3 of the work 2 to fix the work 2, and a second work 2. It is provided with a guide pin 6 to be inserted into the hole 5. Here, the insertion portion 4 is connected to the hanger 1 so that the insertion direction into the work 2 is obliquely upward with respect to the horizontal plane.

FIG. 2 is a cross-sectional view taken along the line AA showing a cross section of the insertion portion 4 of FIG. As shown in FIG. 2, the insertion portion 4 is a male screw type shaft 9 that penetrates the sleeve 7, the diameter-expanding members 8A and 8B existing on the outside of both ends of the sleeve 7, and the sleeve 7 and the diameter-expanding members 8A and 8B. , And a female thread type shaft 10 that is connected to the hanger 1 and screwed with the thread at the tip of the male thread type shaft 9. The female screw type shaft 10 and the hanger 1 may be integrally configured. Further, the hanger 1, the sleeve 7, the diameter-expanding members 8A and 8B, the male thread type shaft 9, and the female thread type shaft 10 have conductivity.

FIG. 3 is a structural explanatory view of the sleeve 7 and the diameter-expanding members 8A and 8B. The sleeve 7 is divided into, for example, three in the circumferential direction. The number of divisions may be any number. Then, the divided sleeves 7 are bundled by the ring-shaped members 11A and 11B. The ring-shaped members 11A and 11B are made of, for example, a fluororubber material and have acid resistance and elasticity. When bundling the sleeves 7, the ring-shaped members 11A and 11B are fitted into the recessed portions 12A and 12B provided in the sleeve 7. Further, both ends of the sleeve 7 and the tips of the diameter-expanding members 8A and 8B are tapered with the same inclination angle. Further, the curvature of the outer peripheral surface of the sleeve 7 is equal to the curvature of the inner peripheral surface of the first hole 3 of the work 2.

Next, a fixing procedure for fixing the work 2 to the hanger 1 will be described. FIG. 4 is a diagram showing an outline of hooking the work 2 on the hanger 1. Further, FIG. 5 is a diagram illustrating the movements of the sleeve 7 and the diameter-expanding members 8A and 8B when the male screw type shaft 9 is twisted and the work 2 is fixed to the hanger 1. When fixing the work 2 to the hanger 1, first, as shown in FIG. 4, the first hole 3 of the work 2 is fitted to the male screw type shaft 9, and the second hole 5 of the work 2 is fitted to the guide pin 6. .. After that, the work 2 is moved toward the hanger 1 until the male screw type shaft 9 penetrates the first hole 3 and the sleeve 7 is located inside the first hole 3. Finally, as shown in FIG. 5, the screw type shaft 9 is screwed onto the female screw type shaft 10. When the male thread type shaft 9 is twisted, the diameter expanding members 8A and 8B in contact with the male thread type shaft 9 and the female thread type shaft 10, respectively, are inserted into the sleeve 7. At this time, the tapered inclined surfaces of the diameter-expanding members 8A and 8B push the inner peripheral surface of the sleeve 7 in the radial direction to expand the diameter of the sleeve 7. FIG. 6 is a cross-sectional view taken along the line BB showing the movement of the sleeve 7 of FIG. 4 when the diameter of the sleeve 7 is expanded in the first hole 3 of the work 2. (A) is the state of the sleeve 7 in the first hole 3 before twisting the male thread type shaft 9, and (B) is in the first hole 3 after twisting the male thread type shaft 9. The state of the expanded sleeve 7 is shown. The diameter of the sleeve 7 is expanded from the state of FIG. 6A while keeping the curvature of the outer peripheral surface constant as shown in FIG. 6B, and the outer peripheral surface of the sleeve 7 is inside the first hole 3. It comes into contact with the peripheral surface and stops. At the time of contact, the curvature of the outer peripheral surface of the sleeve 7 is equal to the curvature of the inner peripheral surface of the first hole 3, so that the entire outer peripheral surface of the sleeve 7 is in surface contact with the first hole 3. Then, the sleeve 7 keeps pushing the inner peripheral surface of the first hole 3 in the radial direction to fix the work 2. The magnitude of the pressure at the time of fixing may be controlled by determining the number of times the shaft 9 is twisted in advance, or may be controlled by using a torque wrench when twisting the shaft 9. The work 2 can be fixed to the hanger 1 by the procedure as described above.

With such a surface treatment device 100, when fixing the work, it is not necessary to hold both the work and the screw by hand at the same time, and it is also necessary to align the hole of the work with the hole of the female screw portion. No. That is, the work man-hours for fixing the work can be reduced. Further, since the insertion portion 4 is connected to the hanger 1 so that the insertion direction is diagonally upward with respect to the horizontal plane, the work 2 hooked on the insertion portion 4 and the guide pin 6 during the fixing work is naturally from the hanger 1. Will not drop out. Therefore, the work load is further reduced.

Next, an example in which a current is passed through the work 2 to perform surface treatment will be described. FIG. 7 is an overall configuration diagram when the surface treatment apparatus 100 according to the present invention is used for, for example, anodizing. The hanger 1 is connected to the anode of the power supply device 13, and the work 2 is immersed in an electrolytic solution 15 such as sulfuric acid or oxalic acid in the electrolytic cell 14. Then, for example, a hanger 17 for suspending the lead plate 16 is connected to the cathode of the power supply device 13. The lead plate 16 is also immersed in the electrolytic solution 15. When the power of the power supply device 13 is turned on, a current flows to the work 2 through the hanger 1, the female screw type shaft 10, the diameter-expanding member 8A, and the sleeve 7. Further, a current flows from the female thread type shaft 10 to the sleeve 7 even if it passes through the male thread type shaft 9 and the diameter expanding member 8B. Then, the metal atoms constituting the work 2 become metal ions in the vicinity of the surface of the work 2, and chemically react with the oxygen ions existing in the electrolytic solution 15 to form an oxide film on the surface of the work 2.

Therefore, if such a surface treatment device 100 is used for the anodizing treatment, the entire outer peripheral surface of the sleeve 7 and the first hole 3 of the work 2 are in surface contact with each other when a current is passed through the work 2. , The work 2 can be reliably energized. Therefore, the generation of sparks between the sleeve 7 and the work 2 is suppressed.

Further, when the sleeve 7 is expanded in diameter, the tapered surface of the inner peripheral surface thereof is pushed in the radial direction by the tapered surfaces of the diameter expanding members 8A and 8B. The inclination angle of the tapered surface of the members 8A and 8B is the same. Therefore, the sleeve 7 and the diameter-expanding members 8A and 8B are in surface contact with each other. Therefore, the generation of sparks between the sleeve 7 and the diameter-expanding members 8A and 8B is also suppressed. Further, the hanger 1 and the female screw type shaft 10, the female screw type shaft 10 and the diameter expanding member 8A, and the male screw type shaft 9 and the diameter expanding member 8B may be provided so as to be in surface contact with each other. Sparks between the hanger 1 and the female thread type shaft 10, the female thread type shaft 10 and the diameter-expanding member 8A, and the male-thread type shaft 9 and the diameter-expanding member 8B are also suppressed.

FIG. 8 shows a modified example of the sleeve 7. The sleeve may have staggered grooves 18 as shown in FIG. Although such a sleeve 7A is not divided in the circumferential direction, the diameter is expanded by inserting the diameter-expanding members 8A and 8B from both ends, and both ends of the sleeve 7A are expanded by the diameter-expanding members 8A and 8B. Since the plurality of parts to be formed come into contact with the inner peripheral surface of the first hole 3 of the work 2, the work 2 can be reliably energized. Therefore, the generation of sparks between the sleeve 7A and the work 2 is suppressed. With such a sleeve 7A, the ring-shaped members 11A and 11B are not required, and the cost can be reduced.

Further, the female screw type shaft 10 and the diameter expanding member 8A may be integrally configured. With such a structure, the number of parts can be further reduced, and the cost can be reduced.

Further, the male screw type shaft may be twisted from the back side of the hanger 1 on the side opposite to the side where the head of the male screw type shaft is connected to the hanger 1 and the work 2 is connected. FIG. 9 shows a cross-sectional view of the vicinity of the insertion portion when the male screw type shaft is twisted from the back side of the hanger 1. As shown in FIG. 9, the surface treatment device 100 includes a sleeve 7, a diameter-expanding member 8B, and ring-shaped members 11A and 11B. Further, a male thread type shaft 9A and a nut 19 screwed into the thread at the tip of the male thread type shaft 9A are provided. Further, instead of the diameter-expanding member 8A, the diameter-expanding member 8C that comes into surface contact with the hanger 1 is provided. The tip of the diameter-expanding member 8C is tapered in the same manner as the diameter-expanding member 8A. Then, by twisting the head of the male screw type shaft 9A, the diameter-expanding members 8B and 8C are inserted inside the sleeve 7, the sleeve 7 is expanded in diameter, and the work 2 is fixed.

Further, the diameter-expanding member may be inserted inside the sleeve 7 by using a lever without twisting the male screw type shaft. FIG. 10 is a schematic view of inserting the diameter-expanding member inside the sleeve 7 using a lever. In this case, the surface treatment device 100 has, for example, a male screw type shaft 9B having a hole in the head portion and an eccentric cam that wraps the head portion of the male screw type shaft 9B from the outside. A lever 20 having a hole at the center of rotation, and a fixing pin 21 which is inserted from the outside of the lever 20 into the hole of the lever 20 and the hole of the head portion of the male screw type shaft 9B to fix the male screw type shaft 9B to the lever 20. A nut 19A screwed into the thread at the tip of the male screw type shaft 9B is provided. Further, the sleeve 7 and the diameter-expanding members 8B and 8C are provided.

When the handle of the lever 20 is rotated, the male screw type shaft 9B connected to the eccentric cam of the lever 20 is pulled in the direction of the hanger 1, and the nut 19A screwed into the male screw type shaft 9B accordingly. Also moves in the direction of hanger 1. Therefore, the diameter-expanding members 8B and 8C are inserted inside the sleeve 7, and the sleeve 7 is expanded in diameter until it comes into contact with the inner peripheral surface of the first hole 3 of the work 2. With such a surface treatment device 100, the work 2 can be easily fixed to the hanger 1.

<Second embodiment>
Next, the surface treatment apparatus according to the second embodiment of the present invention will be described. FIG. 11 is a partially enlarged view of the surface treatment device 101 according to the second embodiment. The surface treatment device 101 is used for surface treatment such as anodizing treatment and plating treatment in which an electric current is passed. The surface treatment device 101 includes a male screw type shaft 9C, a sleeve 7B in which a part of the sleeve 7 is cut, and a case 22 that fits in the cut portion of the sleeve 7B. However, the curvature of the outer peripheral surface of the sleeve 7B is equal to the curvature of the inner peripheral surface of the first hole 3 of the work 2 as in the sleeve 7. Further, the sleeve 7B may or may not have a tapered shape at both ends thereof. Further, the surface treatment device 101 includes a hanger 1 connected to the power supply provided in the surface treatment device 100 of the first embodiment, a female screw type shaft 10 connected to the hanger 1, and a second hole 5 of the work 2. A guide pin 6 to be inserted into the ring and ring-shaped members 11A and 11B are provided. Then, as in the first embodiment, the insertion portion inserted into the first hole 3 of the work 2 is connected to the hanger 1 so that the insertion direction into the work 2 is obliquely upward with respect to the horizontal plane. Further, the female screw type shaft 10 may be integrally configured with the hanger. Further, the hanger 1, the sleeve 7B, the male thread type shaft 9C, and the female thread type shaft 10 have conductivity. However, the diameter-expanding members 8A, 8B, and 8C provided in the first embodiment are not provided in the second embodiment.

FIG. 12 is a cross-sectional view taken along the line CC of FIG. FIG. 12A shows a cross-sectional view before the sleeve diameter is expanded, and FIG. 12B shows a cross-sectional view after the sleeve diameter is expanded. As shown in FIG. 12A, in the male thread type shaft 9C, the first surface portion 23 whose distance from the center is longer than the length of the inner radius of the sleeve 7B and the distance from the center are the inner radius of the sleeve 7B. A second surface portion 24, which is shorter than the length of the above, is provided, and the first surface portion 23 and the second surface portion 24 are provided alternately in the rotation direction of the male screw type shaft 9C. Here, the first surface portion 23 and the second surface portion 24 are provided at, for example, three places each, but the number thereof may be appropriately designed.

The fixing procedure for fixing the work 2 to the hanger 1 is the same as that in the first embodiment. However, in the case of the second embodiment, the diameter of the first surface portion 23 is rotated by twisting the male screw type shaft 9C instead of expanding the diameter of the sleeve by the diameter increasing member, and the inner peripheral surface of the sleeve 7B has a diameter. Pushing in the direction, the sleeve 7B is expanded in diameter to the inner peripheral surface of the first hole 3 of the work 2. In this way, the work 2 is fixed to the hanger 1.

With such a surface treatment device 101, the sleeve 7B can be expanded in diameter and the work 2 can be fixed to the hanger 1 without using the diameter-expanding member. Therefore, the number of parts can be reduced and the cost can be reduced.

Further, as in the first embodiment, when fixing the work, it is not necessary to hold both the work and the screw by hand at the same time, and it is not necessary to align the hole of the work with the hole of the female screw portion. .. That is, the work man-hours for fixing the work can be reduced. Further, since the insertion portion is connected to the hanger 1 so that the insertion direction is diagonally upward with respect to the horizontal plane, the insertion portion and the work 2 hooked on the guide pin 6 naturally fall off from the hanger 1 during the fixing work. There is nothing to do. Therefore, the work load is further reduced.

Further, the surface treatment device 101 according to the second embodiment can be used for the anodizing treatment in the same manner as the surface treatment device 100 according to the first embodiment. When used for anodizing, the entire outer peripheral surface of the sleeve 7B when the sleeve 7B is expanded and the first hole 3 of the work 2 are in surface contact with each other, so that a current flows reliably through the work 2 and the sleeve 7B and the work are used. Spark generation between 2 and 2 is suppressed.

Further, since the sleeve 7B comes into contact with a plurality of first surface portions 23 of the male screw type shaft 9C when the diameter is expanded, spark generation between the sleeve 7B and the male screw type shaft 9C is also suppressed.

Further, the hanger 1 and the female screw type shaft 10 may be provided so as to be in surface contact with each other, and in this case, the generation of sparks between the hanger 1 and the female screw type shaft 10 is suppressed.

Further, the male screw type shaft may be twisted from the back side of the hanger 1 on the side opposite to the side where the head of the male screw type shaft is connected to the hanger 1 and the work 2 is connected. FIG. 13 shows a configuration diagram in which the head of the male screw type shaft is connected to the hanger 1. In this case, the surface treatment device 101 includes a male thread type shaft 9D and a nut 19B screwed into the thread at the tip of the male thread type shaft 9D. Further, the sleeve 7B, the ring-shaped members 11A and 11B, and the case 22 are provided. Further, on the surface of the male thread type shaft 9D, the distance from the center of rotation to the first surface portion whose distance from the center of rotation is longer than the length of the inner radius of the sleeve 7B, as in the case of the male thread type shaft 9C, and the distance from the center of rotation. The second surface portion, which is shorter than the length of the inner radius of the sleeve 7B, is provided alternately in the rotation direction thereof. Here, the first surface portion and the second surface portion are provided at, for example, three places each, but the number thereof may be appropriately designed. Then, by twisting the head of the male screw type shaft 9D, the shaft 9D pushes the inner peripheral surface of the sleeve 7B in the radial direction, and the sleeve 7B is expanded to the inner peripheral surface of the first hole 3 of the work 2. .. In this way, the work 2 is fixed to the hanger 1.

With such a surface treatment device 101, the diameter of the sleeve can be expanded and the work 2 can be fixed to the hanger 1 without using the diameter-expanding member. Therefore, the number of parts can be reduced and the cost can be reduced. Further, when a current is passed through the hanger 1, since the entire outer peripheral surface of the sleeve 7B and the first hole 3 of the work 2 are in surface contact with each other, the current surely flows through the work 2 and the sleeve 7B and the work are surely passed. Spark generation between 2 and 2 is suppressed.

Further, since the sleeve 7B comes into contact with a plurality of first surface portions of the male screw type shaft 9D when the diameter is increased, spark generation between the sleeve 7B and the male screw type shaft 9D is also suppressed.

1 ... Hanger; 2 ... Work; 3 ... First hole; 4 ... Insertion part; 5 ... Second hole; 6 ... Guide pin; 7, 7A, 7B ... Sleeve; 8A, 8B , 8C ... Diameter expansion member; 9, 9A, 9B, 9C, 9D ... Male thread type shaft; 10 ... Female thread type shaft; 11A, 11B ... Ring-shaped member; 12A, 12B ... Ring-shaped member Recessed part to be fitted; 13 ... Power supply device; 14 ... Electrolytic cell; 15 ... Electrolyte solution; 16 ... Lead plate; 17 ... Hanger for hanging the lead plate; 18 ... Alternating grooves; 19, 19A, 19B ... Nut; 20 ... Lever; 21 ... Fixing pin; 22 ... Case; 23 ... First surface; 24 ... Second surface; 100, 101 ... Surface treatment device

Claims (9)

A surface treatment device that allows an electric current to flow through a workpiece with holes.
With the hanger connected to the power supply,
An insertion member that is connected to the hanger body and inserted into the hole of the work.
A sleeve member that covers the outer peripheral surface of the insertion member and can expand the diameter to the inner peripheral surface of the hole of the work.
A diameter-expanding means for expanding the diameter of the sleeve member is provided.
Wherein said hanger insertion member and the sleeve member may have a conductive,
The sleeve member has an outer peripheral surface that can come into surface contact with the inner peripheral surface in a state where the diameter is expanded to the inner peripheral surface by the diameter increasing means.
Surface treatment equipment. The diameter-expanding means includes a diameter-expanding member having a tapered shape portion.
The diameter-expanding member is inserted into the inside of the sleeve member from the outside of both ends of the sleeve member.
The inclined surface of the tapered shape portion pushes the inner peripheral surface of the sleeve member to expand the diameter at the time of insertion.
The diameter-expanding member has conductivity.
The surface treatment apparatus according to claim 1. The outer peripheral surface of the sleeve member, the inner peripheral surface and the curvature of the hole of the workpiece have equal surface portion,
The surface treatment apparatus according to claim 1 or 2. Inner surface said radially enlarged member of both ends of the sleeve member contacts is provided with a tapered portion,
The inclination angle of the tapered shape portion is equal to the inclination angle of the tapered shape portion of the diameter-expanding member.
The surface treatment apparatus according to claim 2. The sleeve member is divided in the circumferential direction.
The surface treatment apparatus according to any one of claims 1 to 4. The sleeve member is bundled by a member made of a fluororubber material.
The surface treatment apparatus according to claim 5. The insertion direction of the insertion member is obliquely upward with respect to the horizontal plane.
The surface treatment apparatus according to any one of claims 1 to 6. A surface treatment method in which an electric current is passed through a workpiece having holes.
In the insertion process in which the insertion member connected to the hanger connected to the power supply is inserted into the hole of the work,
A sleeve member that covers the outer peripheral surface of the insertion member and can be expanded to the inner peripheral surface of the hole of the work is provided with a diameter-expanding step in which the diameter is expanded by the diameter-expanding means.
Wherein said hanger insertion member and the sleeve member may have a conductive,
The sleeve member has an outer peripheral surface that can make surface contact with the inner peripheral surface in a state where the diameter is expanded to the inner peripheral surface in the diameter expansion step.
Surface treatment method. The outer peripheral surface of the sleeve member, the inner peripheral surface and the curvature of the hole of the workpiece have equal surface portion,
The surface treatment method according to claim 8.

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