JP2960395B1 - Cladding tube surface treatment equipment - Google Patents

Abstract

To provide a cladding tube surface treatment apparatus capable of automating a cladding tube surface treatment process. SOLUTION: At a cladding tube holding position, a pair of cladding tube holding devices 6 hold both ends of the cladding tube H sent out from the cladding tube feeding device 5 in a watertight state, and hold the anode member to the cladding tube H.
To the inner or outer peripheral surface of The pair of cladding tube holding devices 6 holding both ends of the cladding tube H are conveyed by the conveyance device 7 and move at a predetermined speed in the anodizing region, the cleaning region, and the drying region. Then, when reaching the cladding tube holding release position, the pair of cladding tube holding devices 6 release the cladding tube holding. This cladding tube is collected by a cladding tube collecting device (not shown).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cladding tube surface treatment apparatus for performing a surface treatment on a cladding tube used for a nuclear fuel rod by an anodic oxidation method.

[0002]

2. Description of the Related Art A cladding tube used for a nuclear fuel rod is subjected to a surface treatment to prevent corrosion. One of such surface treatment methods is a so-called anodic oxidation method. The anodic oxidation method involves immersing a cladding tube and a metal plate made of a metal different from the cladding tube in an electrolytic solution, using the cladding tube as an anode, the metal plate as a cathode, and applying a DC voltage to both electrodes. Is applied to form an oxide film on the surface of the cladding tube.

In order to carry out the anodic oxidation method, first, an operator attaches plugs to both ends of the cladding tube to prevent the electrolytic solution from entering the inside of the cladding tube, and connects an anode lead wire to the cladding tube. At the same time, the exposed portion of the lead wire is subjected to insulation treatment so that only the surface of the cladding tube contacts the electrolytic solution. Then, a direct current voltage is applied between the cladding tube and the cathode metal plate to perform anodizing treatment.

[0004] After the anodizing treatment is completed, an operator removes the anode lead wire from the cladding tube, and then immerses the cladding tube in a cleaning tank filled with a cleaning liquid to perform a cleaning operation. Then, after removing the cladding tube from the washing tank and performing drying, the plugs are removed from both ends of the cladding tube, thereby completing the surface treatment operation of the cladding tube.

[0005]

As described above, in order to perform the surface treatment of the cladding tube, a wide range of operations such as attaching / detaching the plug and the anode lead and performing insulation treatment are performed by the operator. Must be done by work.
Therefore, not only is the labor burdened by the workers large, but also the work time and the product quality are not small due to differences in the skill levels of the workers.

On the other hand, in order to improve the production efficiency and establish a mass production system, it is required to automate the surface treatment process of the cladding tube. However, each of the above manual operations by an operator is complicated to mechanize, and it has been difficult to automate the surface treatment step of the cladding tube.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cladding tube surface treatment apparatus capable of automating a cladding tube surface treatment step.

[0008]

Means for Solving the Problems As means for solving the above-mentioned problems, the invention according to claim 1 is to immerse a cladding tube in an electrolytic solution in an electrolytic cell provided with a cathode member, and to cover the cladding tube. In a cladding tube surface treatment apparatus that forms an oxide film on the surface of the cladding tube by applying a DC voltage between the cladding tube and the cathode member with the tube serving as the anode side, the cladding tube surface treatment device is disposed outside the electrolytic cell to perform surface treatment. A cladding tube feeding device for sequentially feeding cladding tubes to be performed to a predetermined position, and both ends of the cladding tube sent from the cladding tube feeding device to a predetermined position are held in a watertight state so that the electrolytic solution does not enter the inside of the cladding tube. And, having an anode member contacting the inner peripheral surface of both ends of the cladding tube,
Further, a pair of cladding tube holding devices, which are arranged in the transport device such that the cladding tube can move in the surface treatment area,
A control device that controls a feeding operation of the cladding tube feeding device, a holding operation and a holding releasing operation of the cladding tube holding device, and a conveyance operation of the conveyance device, wherein the cladding tube holding device includes a water seal. A frame member whose periphery is covered by an electric insulating coating member, and attached to the outside of the frame member, which expands and contracts in the radial direction of the coating tube,
A collet chuck type anode contactor having a contact claw capable of contacting the inner peripheral surface of the cladding tube; a water-shrinkable insulator mounted on the anode contactor and capable of expanding and contracting in a radial direction of the cladding tube together with the contact claw. A spud member that expands / contracts the contact claw and the water seal expansion / contraction insulator by an axial reciprocation operation of the cladding tube, and a spud member that is disposed inside the frame member and moves the spad member forward / backward. And a driving device.

According to a second aspect of the present invention, in the first aspect of the present invention, the spud member has a coating for guiding an open end of the coating tube toward the anode contactor when holding the coating tube. The pipe mounting guide member is attached.

According to a third aspect of the present invention, in the first or second aspect of the present invention, an anode plug connected to a DC voltage source is attached to the frame member. , Electrically connected to the anode plug via a frame member.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the spud member advancing / retracting driving device is configured such that the spud member moves even after the supply of the driving force from the driving source is stopped. Is held at the position at the time of stopping the supply of the driving force.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the water-sealing electric insulating film member is formed of urethane rubber.
It is characterized by the following.

According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the expansion / contraction insulator for water seal is any one of urethane rubber, beech N, neoprene rubber, and raw rubber. Characterized by the following.

According to a seventh aspect of the present invention, in the first aspect of the present invention, the spud member comprises:
It is characterized by being formed by Inconel.

The invention according to claim 8 is the invention according to any one of claims 2 to 7, wherein the cladding tube mounting guide member is formed of any one of Duracon, MC nylon, and high density nylon. It is characterized by the following.

According to a ninth aspect of the present invention, a coating tube is immersed in an electrolytic solution in an electrolytic cell provided with a cathode member, and a DC voltage is applied between the coating tube and the cathode member with the coating tube serving as an anode. In a cladding tube surface treatment device that forms an oxide film on the surface of the cladding tube by applying a coating tube, a cladding tube feeding device that is disposed outside the electrolytic cell and sequentially sends cladding tubes to be subjected to surface treatment to predetermined positions, An anode member that holds both ends of the cladding tube that has been sent to the predetermined position from the cladding tube feeding device in a watertight state so that the electrolytic solution does not enter the inside of the cladding tube, and contacts the outer peripheral surfaces of both ends of the cladding tube. A pair of cladding tube holding devices, a feeding operation of the cladding tube feeding device, and the cladding tube holding device, which are further disposed on a transport device so that the cladding tubes can move in the surface treatment region. Holding operation and holding A release device, and a control device for controlling the transfer operation of the transfer device, the cladding tube holding device, a frame member whose periphery is covered by a water seal electrical insulating coating member, and the frame member ,
A housing member mounted so as to protrude outside thereof and holding the end of the cladding tube; a slider member slidably disposed inside the housing member and having a conductive knife-type anode contactor; A water sealing insulator mounted on the housing member so as to cover the outer peripheral surface of the cladding tube, and the slider member is moved forward and backward in the axial direction of the cladding tube to form a conductive knife type anode contactor and the water sealing member. A slider member advance / retreat drive device for bringing the insulator into contact with the outer peripheral surface of the cladding tube.

According to a tenth aspect of the present invention, a coating tube is immersed in an electrolytic solution in an electrolytic cell provided with a cathode member, and a DC voltage is applied between the coating tube and the cathode member with the coating tube serving as an anode. In a cladding tube surface treatment device that forms an oxide film on the surface of the cladding tube by applying a coating tube, the cladding tube feeding device that is disposed outside the electrolytic cell and sequentially sends the cladding tube to be subjected to the surface treatment to a predetermined position, An anode member that holds both ends of the cladding tube that has been sent to the predetermined position from the cladding tube feeding device in a watertight state so that the electrolytic solution does not enter the inside of the cladding tube, and contacts the outer peripheral surfaces of both ends of the cladding tube. Have
Further, a pair of cladding tube holding devices, which are arranged in the transport device such that the cladding tube can move in the surface treatment area,
A control device that controls a feeding operation of the cladding tube feeding device, a holding operation and a holding releasing operation of the cladding tube holding device, and a conveyance operation of the conveyance device, wherein the cladding tube holding device includes a water seal. A frame member whose periphery is covered by an electrical insulating coating member for use, a housing member attached to the frame member so as to protrude outside thereof, and holding an end of the cladding tube; and a housing member inside the housing member. A collet chuck type anode contactor disposed therein, having a hollow portion communicating with a fluid supply source, mounted on the housing member so as to cover an outer peripheral surface of the cladding tube, and supplying fluid to the hollow portion; The collet chuck type anode contactor is brought into contact with the outer peripheral surface of the cladding tube by an expanding operation in the case where the outer peripheral surface of the cladding tube is kept in a watertight state. And having a use scaling insulator body.

[0018]

[0019]

[0020]

[0021]

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of the present embodiment,
FIG. 2 is a view taken in the direction of arrows AA in FIG. In FIG. 1, an electrolytic cell 1 is provided in an anodizing region, and a cleaning tank 2 is provided in a cleaning region adjacent to the anodizing region. The electrolytic bath 1 is filled with the electrolytic solution 3, and the cleaning bath 2 installed adjacent to the electrolytic bath 1 is filled with the cleaning liquid 4.

A coating tube H is provided on the upper side of one end of the electrolytic cell 1.
Are sequentially provided in a state of holding at multiple points. Further, a pair of right and left transfer devices 7 (not shown in FIG. 1, for example,
Only shown in FIG. ) Are installed, and a plurality of sets of a pair of cladding tube holding devices 6 are arranged on the side surfaces of the pair of right and left transfer devices 7.

After the cladding tube H is held by the cladding tube holding device 6 at the cladding tube holding position, the conveyance device 7 conveys the cladding tube H along the path indicated by the arrow Y1 to a downstream adjacent process region, ie, a positive oxidation treatment region. After passing through the cleaning processing area and the drying area, the holding is released at the cladding tube holding releasing position. Then, the cladding tube holding device 6 having released the cladding tube H is returned to the cladding tube holding position by the transport device 7 along the return path Y2 located above the path Y1. The height when the cladding tube holding device 6 holding the cladding tube H moves along the path Y1 is maintained at h1 so that the cladding tube H is immersed in the electrolytic solution 3 and the cleaning solution 4. However, the cladding tube holding device 6 which does not hold the cladding tube H does not need to be immersed in the electrolytic solution 3 and the cleaning solution 4, so that the height h2 is maintained higher than h1. It has become.

In FIG. 2, a pair of cladding tube holding devices 6
Can be moved in a direction in which they can be separated and approached from each other by the transport device 7 supported by the support customers 10. Then, both ends of the cladding tube H sent out from the cladding tube feeding device 5 are held at predetermined holding positions. In FIG. 2, reference numeral 6A indicates the position of the cladding tube holding device 6 which moves along the return path Y2 in FIG. 1. However, as indicated by reference numeral 6B, this return path Y2 is a forward path. It is also possible to provide it at the same height as Y1 but outside of it.

The control of the feeding operation of the cladding tube feeding device 5, the holding operation and the holding releasing operation of the cladding tube holding device 6, and the carrying operation of the carrying device 7 are performed by a control device (not shown). It has become.

FIG. 3 is a sectional view showing the configuration of the cladding tube holding device 6. As shown in FIG. In this figure, a cladding tube holding device 6 is attached to a base member 7 a of a transport device 7. The frame member 8, which is one member of the cladding tube holding device 6,
It has a bottom plate portion 8a, a side wall portion 8c rising from the bottom plate portion 8a, and a flange portion 8b extending horizontally from an upper portion of the side wall portion 8c. Most of the periphery of the frame member 8 is covered with a water seal electrical insulating coating member 9 formed of urethane rubber, and the bottom plate portion 8a of the frame member 8 is interposed via the water seal electrical insulating coating member 9. It is attached to the base member 7a. An opening 9a is formed in the upper part of the water-sealing electric insulating film member 9. Therefore, the electric insulating coating member 9 for water seal is used.
Inside is a closed space that is almost boat-shaped.

On the bottom plate portion 8a of the frame member 8, a spud member reciprocating driving device 1 for reciprocating the driving rod 12 is provided.
1 is provided. This spud member advance / retreat drive device 1
1 is a device that can hold the spud member at the position at the time of stopping the supply of the driving force even after the supply of the driving force from the driving source is stopped, and is configured by an air actuator or an external operation lever or the like. is there. In this embodiment,
A spud member advance / retreat drive device 11 is constituted by the air actuator.

A connector 13 communicating with a compressed air supply source (not shown) such as a compressor is attached to the flange portion 8b of the frame member 8. The connector 13 is connected to the connector 13 via an air hose 14 and an air hose 15. The compressed air is sent to the spud member advance / retreat drive device 11. This spud member advance / retreat drive device 11
For example, when compressed air is sent from the air hose 14, the drive rod 12 is advanced and the air hose 15
When compressed air is sent from the drive rod 12, the drive rod 12 is retracted.

An anode plug 2 connected to a DC voltage source (not shown) is provided on the flange portion 8b of the frame member 8.
The frame member 8 is electrically connected to a DC voltage source via the anode plug 22.

A collet chuck type anode contactor 16 is attached to the lower portion of the side wall portion 8c of the frame member 8 of the cladding tube holding device 6 so as to protrude outward. The collet chuck type anode contactor 16 is used for water sealing. It protrudes to the side through the electric insulating film member 9. The open end of the cladding tube H is pressed against the surface of the insulating sleeve 17 mounted on the water-sealing electrical insulating coating member 9 so as to include the collet chuck type anode contactor 16. I have.

FIG. 4 is an enlarged view of a part of FIG. 3, and is a cutaway sectional view showing a mounting structure of the collet chuck type anode contactor 16 and its peripheral components. In this figure, a mounting screw hole 8 is provided in the frame member 8.
A base end of a collet chuck type anode contactor 16 having a substantially cylindrical shape and having a hollow portion formed inside is screwed into the mounting screw hole 8d. The tip of the collet chuck type anode contactor 16 is attached to the mounting screw hole 8.
hole 9 of the electrically insulating coating member 9 for water seal adjacent to d.
b, it protrudes toward the outside of the water-insulating electrical insulating coating member 9, and a plurality of contact claws 16a are formed at the tip thereof. The contact claw 16a is formed radially on the outer peripheral surface of the distal end, and has a sharp top. Collet chuck type anode contactor 1
A plurality of slits are provided along the axial direction at and near the tip end of 6, and like a collet chuck, the contact claw 16a and its vicinity are perpendicular to the axial direction, that is, in the radial direction. It can be expanded and reduced. The collet chuck type anode contactor 16 also has an annular projection 16b and an inner tapered portion 1 on its inner peripheral surface.
6c, and an outer tapered portion 16d is formed in front of the contact claw 16a.

An insulating sleeve 17 made of urethane rubber is mounted on the outer side of the collet chuck type anode contactor 16 and behind the contact claw 16a. The hole 9b is closed by contacting the surface of the insulating film member 9. And
On the surface of the flange portion 17a opposite to the hole 9b side,
The open end faces of the cladding tube H are in contact with each other. In addition,
At this time, the force at which the opening end face of the cladding tube H contacts the flange portion 17a is an appropriate force that does not cause buckling of the cladding tube H.

Further outside the body of the insulating sleeve 17, a doughnut-shaped water seal expansion / contraction made of urethane rubber, beech N, neoprene rubber, or raw rubber, which can be freely expanded and reduced. An insulator 18 is mounted. FIG. 4 shows a state in which the collet chuck type anode contactor 16 and the expansion / contraction insulator 18 for water seal are reduced, and the sharp top of the contact claw 16a and the outer peripheral surface of the expansion / contraction insulator 18 for water seal. Are clad tubes H
Are spaced apart from the inner peripheral surface of the.

A substantially cylindrical spud member 19 is slidably disposed in the hollow portion of the collet chuck type anode contactor 16. The base end of the spud member 19 is connected to the drive rod 12 of the spud member advance / retreat drive device 11 via a connection pin 20. And the spud member 19
A collet chuck type anode contactor 1
Annular groove 19a having a shape that fits with the projection 16b
And an expanded tapered portion 19b located in front of the groove 19a.
And a screw portion 19c located at the tip end. In this embodiment, as the material of the spud member 19, Inconel having excellent elasticity is used.

A threaded portion 19c at the tip of the spud member 19 is threaded with a cladding tube mounting guide member 21 having a substantially truncated conical shape and made of any one of Duracon, MC nylon and high-density nylon. Is being worn. On the outer peripheral surface of the cladding tube mounting guide member 21, a guide taper portion 21a having a gradually increasing diameter is formed to guide the cladding tube H to the water sealing electric insulating film member 9 side. The outer tapered portion 1 at the tip of the collet chuck type anode contactor 16 is provided on the back side of the guide tapered portion 21a.
A reduced tapered portion 21b is formed so as to uniformly contact 6d.

Next, the operation of the present embodiment configured as described above will be described. In FIG. 1, a pair of cladding tube holding devices 6 that are to hold the cladding tube H from now on are conveyed by the conveying device 7 and temporarily stop at the cladding tube holding position below the cladding tube feeding device 5. At this time, as shown in FIG. 2, the pair of cladding tube holding devices 6 are separated from each other so that the distance between the cladding tube holding devices 6 is sufficiently larger than the length of the cladding tube H. Then, the cladding tube H descends from the cladding tube feeding device 5 while being suspended by a suspending member (not shown), and descends to a height set as a holding height of the pair of cladding tube holding devices 6. At that point, the lowering operation stops.

Next, the pair of cladding tube holding devices 6 move in a direction approaching each other. At this time, due to the function of the guide taper portion 21a of the cladding tube mounting guide member 21 shown in FIG. 4, the axis of the cladding tube H gradually approaching and the axis of the collet chuck type anode contactor 16 are slightly moved. Can be smoothly sent out toward the water-insulating coating member 9 for water sealing, and the collet chuck type anode contactor 16 and the water seal The expansion / contraction insulator 18 can be inserted.

Thus, the pair of cladding tube holding devices 6
When moving in a direction approaching each other by a predetermined distance,
Both end surfaces of the cladding tube H come into contact with the pair of cladding tube holding devices 6. FIG. 4 shows a state near the end surface of the cladding tube H in the cladding tube holding device 6 at this time, and the end surface of the cladding tube H is in contact with the flange portion 17 a of the insulating sleeve 17. After this state, the suspension member of the cladding tube feeding device 5 is lifted to the original position,
Next, a suspension of the cladding tube H to be sent out is prepared.

As shown in FIG. 4, both end surfaces of the cladding tube H are
When held by the pair of cladding tube holding devices 6, compressed air is sent from the compressed air supply source to the spud member advance / retreat drive device 11 via the connector 13 and the air hose 14 shown in FIG. Then, the spud member advance / retreat drive device 11
The drive rod 12 is moved forward by a predetermined distance. As a result, the spud member 19 slides in the hollow portion of the collet chuck type anode contactor 16 and moves forward. When the spud member 19 advances in the hollow portion of the collet chuck type anode contactor 16, the expanded tapered portion 19b pushes the annular projection 16b, which has been in contact therewith, outward and through, and the inner tapered portion located in front of it. 16c, the vicinity of the tip of the collet chuck type anode contactor 16 is expanded. FIG. 5 shows the state at this time.

As shown in FIG. 5, the expanded tapered portion 19b
Is in contact with the inner tapered portion 16 c, and the tip of the collet chuck type anode contactor 16 is expanded by the spud member 19. Therefore, the sharp top portion of the contact claw 16a and the outer peripheral surface of the water seal expansion / contraction insulator 18 are pressed against the inner peripheral surface of the cladding tube H with a certain pressing force or more. In addition, due to the forward movement of the spud member 19, the outer tapered portion 16d of the collet chuck type anode contactor 16 and the reduced tapered portion 21b of the cladding tube mounting guide member 21 which are in contact with each other in the state of FIG. Has become.

In the state shown in FIG. 5, the end surface of the cladding tube H is in contact with the flange portion 17a of the insulating sleeve 17, and the outer peripheral surface of the water sealing expansion / contraction insulator 18 is expanded. It is pressed against the inner peripheral surface. Therefore, both ends of the cladding tube H are held in a watertight state by the pair of cladding tube holding devices 6, and in this state,
Even if the coating tube H is immersed in the electrolytic solution 3 and the cleaning solution 4, the electrolytic solution 3 and the cleaning solution 4 do not enter the inside of the coating tube H.

After holding both ends of the cladding tube H in a water-tight state as shown in FIG. 5, the pair of cladding tube holding devices 6 leave the cladding tube holding position shown in FIG. The tube H is fed into the electrolytic cell 1 so as to have a height so as to be immersed in the electrolytic solution 3, and thereafter is conveyed at a slow predetermined speed through the anodizing region in the electrolytic cell 1. Then, when the above-described DC voltage source is turned on, the cladding tube H in which the contact claw 16a of the collet chuck type anode contactor 16 is in contact with the inner peripheral surface becomes the anode side, and is disposed in the electrolytic cell 1. The anodizing treatment is performed with the metal plate (not shown) on the cathode side, and an oxide film is formed on the surface of the cladding tube H.

When the anodic oxidation treatment is completed in this way, the transport device 7 subsequently guides the pair of cladding tube holding devices 6 and the cladding tubes H held by the cladding tube holding device 6 into the cleaning tank 2 to set the cleaning processing region in a predetermined area. Convey at speed. Next, after the transport device 7 finishes transporting the pair of cladding tube holding devices 6 and the cladding tubes H held by the pair in the cleaning processing area, they lift them up from the cleaning tank 2 and transport the drying area at a predetermined speed. Let it.
Then, after completing the transport in the drying area, the transport device 7 temporarily stops the pair of cladding tube holding devices 6 at the cladding tube holding release position.

When the pair of cladding tube holding devices 6 is temporarily stopped, compressed air is sent from a compressed air supply source (not shown) to the spud member advance / retreat driving device 11 via the connector 13 and the air hose 15 shown in FIG. It is. Then, the spud member advance / retreat drive device 11 is driven by the drive rod 12
Is moved backward by a predetermined distance. As a result, the spud member 19 slides and retreats in the hollow portion of the collet chuck type anode contactor 16. When the spud member 19 retreats in the hollow portion of the collet chuck type anode contactor 16, the reduced taper portion 21b of the cladding tube mounting guide member 21 which has been located in front of the outer taper portion 16d hits the outer taper portion 16d. Touch By the contact between the reduced tapered portion 21b and the outer tapered portion 16d, the tip of the collet chuck type anode contactor 16 is reduced so as to be narrowed down. The contraction of the contact claw 1
6a and the water seal expansion / contraction insulator 18 are separated from the inner peripheral surface of the cladding tube H which has been in contact therewith.

Contact claw 16a and expansion / contraction insulator 1 for water seal
After the separation of the cladding tube H from the inner peripheral surface of the cladding tube H, the pair of cladding tube holding devices 6 move by a predetermined distance in a direction in which they are separated from each other, and release the cladding tube H from being held. At this time, a cladding tube recovery device (not shown) disposed at the cladding tube holding release position
Is already waiting, and the collecting member moves the cladding tube H released from being held by the cladding tube holding device 6 to a predetermined location. The pair of cladding tube holding devices 6 from which the cladding tubes H have been removed are transported again along the return path Y2 toward the original cladding tube holding position by the conveying device 7, and the same operation as described above is repeated.

According to the cladding tube surface treatment apparatus according to the present embodiment described above, the expandable and contractable contact claw 16a is inserted near the end of the cladding tube H, and this is brought into contact with the inner peripheral surface of the cladding tube H. The contact claw 16a is waterproofed by the expandable and contractable insulator 18 for water seal, so that the cladding tube H side is used as the anode side for electrical connection for anodizing. Pre-processing work such as work and connection disconnection work can be automated. Therefore, it is not necessary to manually attach / detach a lead wire or perform an insulation work, etc., as in the conventional case, and it is possible to greatly reduce the labor of the worker, and to prevent accidents during the work of the worker. Can be eliminated, which can contribute to the improvement of safety at the work site.

Further, by employing the above-mentioned cladding tube surface treatment apparatus, the work time required for the surface treatment of the cladding tube can be shortened. For example, the time required for the pre-processing work such as the connection / removal work of the lead wire by the manual operation of the conventional worker was about 7 minutes per clad tube, but the clad tube surface treatment apparatus according to the present embodiment. When is used, the time is reduced to about 0.5 minutes. Further, by automating the above-mentioned pre-processing work, it is possible to eliminate variations in product quality which have not been caused to a considerable extent in the past.

Then, a plurality of pairs of clad tube holding devices 6 provided with the constituent members such as the above-mentioned contact claws 16a and water sealing expansion / contraction insulators 18 are mounted on the transporting device 7, and these are continuously anodized. Since the processing area, cleaning area, drying area, etc. can be moved, it is possible to quickly shift to each step such as the anodizing step, cleaning step, drying step, etc., and establish a mass production system. Can be. By employing the cladding surface treatment apparatus according to the present embodiment, the tact time in each step can be suppressed to about 0.5 minutes per cladding tube.

By the way, the configuration shown in FIGS.
The anode member (collet chuck type anode contactor 16) is brought into contact with the inner peripheral surface of the cladding tube H. As shown in FIG. 6 or 8, the anode member is brought into contact with the outer peripheral surface. You can also.

FIG. 6 is a cutaway sectional view showing a structure in which a conductive knife-type anode contactor as an anode member contacts the outer peripheral surface of the cladding tube H, and FIG. 7 is a view taken along the line BB of FIG. is there.
In these figures, the periphery of a frame member 8 is covered with an electric insulating coating member 9 for water sealing, and a flange 23a of a housing member 23
4 fixed. A substantially cylindrical slider member 25 is slidably disposed in the inner space of the housing member 23, and its end is connected to a slider member (not shown) via a connecting pin 20 and a drive rod 12. It is connected to a drive. This slider member advance / retreat drive device is the spud member advance / retreat drive device 1 described in FIG.
1 has a configuration similar to that of FIG.

A hole 25a is formed inside the slider member 25, and a plurality of conductive knife-type anode contactors 26 are radially provided on the peripheral surface of the hole 25a (see FIG. 7). An annular groove 25 is formed on the outer peripheral surface of the slider member 25.
b is formed, and an O-ring 2 is formed in the annular groove 25b.
8 is attached. Therefore, water tightness inside the frame member 8, that is, inside the cladding tube holding device 6 is ensured.

An annular projection 23b is formed on the housing member 23. A water seal having a substantially V-shaped cross section is provided between the annular projection 23b and the distal end 25c of the slider member 25. Insulator 27 is provided. Then, the annular protrusion 23 that comes into contact with the water seal insulator 27 is formed.
b and each contact surface of the tip portion 25c are made of a water seal insulator 2.
7, so as to uniformly contact the corresponding contact surfaces. Note that the slider member 25 is formed of a conductive material, and the slider member 25 is connected to an anode terminal 30 of a DC voltage source (not shown) by a lead wire 29.
In addition, a cladding tube mounting guide tapered surface 23c is formed on the front surface of the annular projection 23b of the housing member 23.

Next, the operation of FIG. 6 will be described. At first, the slider member 25 is positioned at a position higher than the position shown in FIG.
And the end of the cladding tube H enters the inside of the housing member 23 in this state. At this time, the cladding tube H is smoothly guided by the cladding tube mounting guide tapered surface 23c formed on the front surface of the annular projection 23b.

Next, the slider member advance / retreat drive device operates, and the slider member 25 is driven to the side approaching the cladding tube H. Then, the distal end portion 25c of the slider member 25 is connected to the water seal insulator 27 by the annular protrusion 2 of the housing member 23.
3b. Then, the substantially V-shaped cross section of the water seal insulator 27 is deformed toward the center side by the pressing, so that the inner peripheral surface of the water seal insulator 27 strongly adheres to the outer peripheral surface of the cladding tube H. . Therefore, watertightness on the outer peripheral surface of the cladding tube H is ensured. At this time, the plurality of conductive knife type anode contactors 26 provided in the holes 25a of the slider member 25 come into contact with the outer peripheral surface of the cladding tube H. Therefore, the cladding tube H is electrically connected to the anode terminal 30 of the DC voltage source, and the cladding tube H becomes the anode side, so that the anodizing treatment can be performed.

FIG. 8 is a sectional view showing a structure in which a collet chuck type anode contactor 34 as an anode member contacts the outer peripheral surface of the cladding tube H, and FIG. 9 is a view taken in the direction of arrows CC in FIG. . In these figures, the periphery of the frame member 8 is covered with a water seal electrical insulating film member 9, and a flange 31 a of a housing member 31 is fixed to the frame member 8 with bolts 24.

An annular protrusion 31b is formed on the distal end side of the housing member 31, and a cladding tube mounting guide taper surface 31c is formed on the front surface of the annular protrusion 31b.
A screw portion 31 d is provided on the rear end side of the housing member 31.
Is formed, and the screw portion 32a of the boss member 32 is screwed into the screw portion 31d, whereby the housing member 3 is formed.
The boss member 32 is fixed to 1. An annular groove 32b is formed in the boss member 32, and an O-ring 33 is mounted in the annular groove 32b. Therefore, water tightness inside the frame member 8, that is, inside the cladding tube holding device 6 is ensured.

The boss member 32 is integrally formed with a collet chuck type anode contactor 34 as an anode member. In the collet chuck type anode contactor 34, a plurality of contact claws 34a capable of contacting the outer peripheral surface of the cladding tube H are formed radially, and a bent projection 34b is also formed.

The housing member 31 has an inner wall 31e, and a bag-shaped water sealing expansion / contraction insulator 35 having a hollow portion 35a is attached to the inner wall 31e by adhesion. A tube 36 is connected to a front portion of the water seal expansion / contraction insulator 35, and the hollow portion 35a is connected to a fluid supply source (air supply source in this embodiment) (not shown) through the tube 36. Communicating. A groove 31f is formed in the annular protrusion 31b of the housing member 31, and the vicinity of the connection portion of the tube 36 is housed in the groove 31f.

The contact claw 3 is attached to the water-sealing insulating insulator 35.
A concave portion 35b having a shape corresponding to the shape of 4a is formed, and a pressing piece 37 is attached to a position facing the bent protrusion 34b at the rear of the water seal expansion / contraction insulator 35.

Next, the operation of FIG. 8 will be described. Initially,
No air is supplied into the hollow portion 35a of the water seal expansion / contraction insulator 35, and the collet chuck type anode contactor 34
The contact claw 34a is separated from the outer peripheral surface of the cladding tube H, unlike the state shown in the figure. In this state, the end of the cladding tube H enters the inside of the housing member 31. At this time, the cladding tube H is smoothly guided by the cladding tube mounting guide taper surface 31c formed on the front surface of the annular projection 31b. Done in At this time, since the vicinity of the connection portion of the tube 36 is housed in the groove 31f formed in the annular projection 31b, the presence of the tube 36 may hinder the guiding operation of the cladding tube mounting guide tapered surface 31c. There is no.

Then, the air from the air supply source is supplied to the hollow portion 35 of the water seal expansion / contraction insulator 35 through the tube 36.
It is sent into a. Then, the expansion / contraction insulator 3 for the water seal
5 is expanded (expanded) as a whole, and the inner peripheral surface of the water sealing expansion / contraction insulator 35 is strongly adhered to the outer peripheral surface of the cladding tube H, so that water tightness on the outer peripheral surface of the cladding tube H is ensured.

At this time, the expansion / contraction insulator 3 for water sealing is used.
Due to the expansion of 5, the pressing piece 37 moves toward the bent protrusion 34b, and presses the bent protrusion 34b. The contact claw 34a is brought into contact with the outer peripheral surface of the cladding tube H by the pressing of the bent projection 34b. At this time, a concave portion 35b having a shape corresponding to the shape of the contact claw 34a is formed in the water seal expansion / contraction insulator 35, and the contact claw 34a is housed in the concave portion 35b. The seal expansion / contraction insulator 35 is effectively prevented from being damaged by the contact claw 34a.

The present invention broadly includes the following embodiments in addition to the above-described embodiments. (1) In the above embodiment, for example, it is assumed that both collet chuck type anode contactors 16 of the pair of cladding tube holding devices 6 shown in FIG. 4 function as anode members at the time of anodizing treatment. However, only one of them may function as an anode member, and the other collet chuck type anode contactor 16 may function only to keep the end of the cladding tube H watertight. That is, only one anode plug 22 (see FIG. 3) of the pair of cladding tube holding devices 6 may be connected to a DC voltage source by a lead wire, and the other anode plug 22 may not be connected to a lead wire. It is possible. The same applies to the conductive knife type anode contactor 26 and the collet chuck type anode contactor 34 shown in FIGS. 6 and 8.

(2) In the above-described embodiment, the case has been described where the spud member advance / retreat drive device 11 and the slider member advance / retreat drive device are constituted by air actuators. However, the spud member is driven by an electric actuator or an external mechanical mechanism such as a cam. The forward / backward drive device 11 may be configured.

(3) In the above embodiment, the current / voltage control in the anodizing step is not specifically described. However, each of a plurality of sets of a pair of cladding tube holding devices 6 provided on the transfer device 7 , Individual current / voltage control can be performed.

(4) In the above embodiment, the withstand current value of the member through which the direct current flows is not described, but it is preferable to use a member having a withstand current value of at least 20 A or more. The value of the direct current flowing through these members varies depending on the type, concentration, temperature, electrode state, etc. of the electrolytic solution. Therefore, these members are required to have a withstand current value of about 20 A or more. In addition,
The upper limit of the direct current is limited by the safety device.

(5) Electrolysis tank 1 and cleaning tank 2 in FIG.
Is about 20 centimeters deep. And the height of the frame member 8 of the cladding tube holding device 6 may be about 30 cm.

(6) In the above embodiment, urethane rubber is used as the material of the electric insulating coating member 9 for water seal and the insulating sleeve 17, but depending on the type and concentration of the anodic oxidation treatment liquid, Various materials that do not dissolve, are not brittle, have insulating properties higher than that of a semiconductor, and have a long life can be selected and used. For example, in an approximately 1% aqueous solution of potassium hydroxide used for general purposes, a wide range of materials such as raw rubber and polyethylene resin can be used in addition to urethane rubber. However, no matter which material is used, these water sealing electric insulating coating members 9 are used.
The insulating sleeve 17 is required to have a shape that is easy to clean in order to avoid leakage due to the wetting of the electrolytic solution 3 and not to cause conduction due to dirt. In addition, some of the materials formed of these materials have been subjected to a scratch prevention treatment or an antistatic treatment, but since such materials include those that conduct electricity to the surface layer portion, Excluded from selection.

[0070]

As described above, according to the present invention, both ends of the cladding tube are held in a water-tight state by a pair of cladding tube holding devices having an anode member which comes into contact with the inner peripheral surface of the cladding tube. Since the holding can be released after the treatment is completed, and the pair of clad tube holding devices can be moved from one side of the electrolytic cell to the other side by the transfer device, the anodic oxidation is performed. It is possible to automate pre-processing operations such as an electrical connection operation and a connection disconnection operation for performing a process, and to establish a mass production system.

Therefore, by automating the pre-processing work, the labor of the worker can be greatly reduced, the safety can be ensured, and the variation in the product quality which has occurred to a considerable extent in the past can be eliminated. it can.

[Brief description of the drawings]

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

FIG. 2 is a view taken in the direction of arrows AA in FIG. 1;

FIG. 3 is a sectional view showing a configuration of the cladding tube holding device 6 in FIG. 1 or FIG. 2;

FIG. 4 is an enlarged view of a part of FIG. 3, showing a collet chuck type anode contactor 16 which is in contact with an inner peripheral surface of an end portion of a cladding tube H, and a mounting structure of components around the collet chuck type anode contactor 16; The cutaway sectional view shown.

FIG. 5 shows a state where the spud member 19 and the cladding tube mounting guide member 21 in FIG. 4 perform a forward movement.
FIG. 3 is a cutaway sectional view showing a mounting structure of a collet chuck type anode contactor 16 and components around it.

FIG. 6 shows a conductive knife type anode contactor 26 as an anode member.
FIG. 3 is a cutaway sectional view showing a structure in which a contact is made with the outer peripheral surface of the cladding tube H.

FIG. 7 is a view taken in the direction of arrows BB in FIG. 6;

FIG. 8 is a cross-sectional view showing a structure in which a collet chuck type anode contactor as an anode member contacts an outer peripheral surface of a cladding tube H;

9 is a view taken in the direction of arrows CC in FIG. 8;

[Explanation of symbols]

 H Coating tube 1 Electrolysis tank 2 Cleaning tank 3 Electrolytic solution 4 Cleaning solution 5 Coating tube feeding device 6 Coating tube holding device 7 Transport device 8 Frame member 8a Bottom plate portion 8b Flange portion 8c Side wall portion 8d Mounting screw hole 9 Electric insulating film for water seal Member 9a Opening 9b Hole 10 Support leg 11 Spud member reciprocating drive 12 Drive rod 13 Connector 14 Air hose 15 Air hose 16 Collet chuck type anode contactor 16a Contact claw 16b Projection 16c Inner taper 16d Outer taper 17 Insulation sleeve 17a Flange Reference Signs List 18 expansion / contraction insulator for water seal 19 spud member 19a groove 19b expansion taper portion 19c screw portion 20 connection pin 21 cladding tube mounting guide member 21a guide taper portion 21b reduction taper portion 22 anode plug 23 housing member 23a flange 23b annular protrusion 3c Cladding tube mounting guide tapered surface 24 Bolt 25 Slider member 25a Hole 25b Annular groove 25c Tip 26 Conductive knife type contactor 27 Water seal insulator 28 O-ring 29 Lead wire 30 Anode terminal 31 Housing member 31a Flange 31b Ring Projection portion 31c Cladding tube mounting guide tapered surface 31d Screw portion 31e Inner wall 31f Groove 32 Boss member 32a Screw portion 32b Annular groove 33 O-ring 34 Collet chuck type anode contactor 34a Contact claw 34b Bending protrusion 35 Water-sealing expansion / contraction insulator 35a Hollow part 35b Concave part 36 Tube 37 Pressing piece

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Katsuhiro Fukawa 2-3-1 Kawakawa, Yokosuka City, Kanagawa Prefecture, Japan JF Service Engineering Co., Ltd. (56) References JP-A-59-208099 (JP, A) JP-A-51-121441 (JP, A) JP-B-57-61840 (JP, B2) (58) Fields investigated (Int. Cl. ⁶ , DB name) C25D 17/06-17 / 08 C25D 7/04 C25D 11/00 303

Claims (10)

(57) [Claims] A coating tube is immersed in an electrolytic solution in an electrolytic cell provided with a cathode member, and a coating is performed by applying a DC voltage between the coating tube and the cathode member with the coating tube serving as an anode. In a cladding tube surface treatment device for forming an oxide film on the surface of a tube, a cladding tube feeding device which is disposed outside the electrolytic cell and sequentially sends a cladding tube to be subjected to surface treatment to a predetermined position; and An anode member that holds both ends of the cladding tube that has been sent to the predetermined position in a watertight state so that the electrolytic solution does not enter the inside of the cladding tube, and that contacts the inner peripheral surfaces of both ends of the cladding tube, Further, a pair of cladding tube holding devices, which are disposed in the transport device so that the cladding tubes can move in the surface treatment region, a feeding operation of the cladding tube feeding device, a holding operation and a holding of the cladding tube holding device, Release operation and before A control device for controlling a transfer operation of the transfer device, wherein the cladding tube holding device is attached to the outside of the frame member, a frame member whose periphery is covered by a water seal electric insulating coating member, A collet chuck type anode contactor having a contact claw that can expand and contract in the radial direction of the cladding tube and contact the inner peripheral surface of the cladding tube; A water seal expandable / contractible insulator, a spud member that expands / contracts the contact claw and the water seal expandable / contractible insulator by an axial movement of the cladding tube, A cladding tube surface treatment device, comprising: a spud member advance / retreat drive device for moving the spud member forward / backward. 2. The spud member is provided with a cladding tube mounting guide member for guiding an open end of the cladding tube toward the anode contactor when holding the cladding tube. The cladding tube surface treatment apparatus according to claim 1. 3. An anode plug connected to a DC voltage source is attached to the frame member, and the collet chuck type anode contactor is electrically connected to the anode plug via a frame member. The cladding tube surface treatment apparatus according to claim 1 or 2, wherein: 4. The spud member advancing / retracting drive device holds the spud member at the position at the time of stopping the supply of the driving force even after the supply of the driving force from the driving source is stopped. The cladding tube surface treatment apparatus according to claim 1. 5. The cladding tube surface treatment apparatus according to claim 1, wherein said water sealing electric insulating film member is made of urethane rubber. 6. The water-sealable expansion / contraction insulator is made of any one of urethane rubber, beech N, neoprene rubber, and raw rubber. A coating tube surface treatment apparatus as described in the above. 7. The cladding tube surface treatment apparatus according to claim 1, wherein the spud member is formed of Inconel. 8. The cladding surface treatment according to claim 2, wherein said cladding tube mounting guide member is formed of any one of Duracon, MC nylon, and high-density nylon. apparatus. 9. A coating tube is immersed in an electrolytic solution in an electrolytic cell provided with a cathode member, and the coating tube is used as an anode to apply a DC voltage between the coating tube and the cathode member. In a cladding tube surface treatment device for forming an oxide film on the surface of a tube, a cladding tube feeding device which is disposed outside the electrolytic cell and sequentially sends a cladding tube to be subjected to surface treatment to a predetermined position; and An anode member that holds both ends of the cladding tube that has been sent to the predetermined position in a watertight state so that the electrolytic solution does not enter the inside of the cladding tube, and that contacts the outer peripheral surfaces of both ends of the cladding tube, A pair of cladding tube holding devices, which are disposed in a transport device so that the cladding tubes can move in the surface treatment region, a feeding operation of the cladding tube feeding device, a holding operation of the cladding tube holding device, and a holding release. Action, as well as before A control device for controlling a transfer operation of the transfer device, wherein the cladding tube holding device includes: a frame member whose periphery is covered by a water seal electrical insulating coating member; A housing member mounted to hold the end of the cladding tube; a slider member slidably disposed inside the housing member and having a conductive knife-type anode contactor; An insulator for water seal mounted on the housing member so as to cover an outer peripheral surface, and the slider member is moved forward and backward in the axial direction of the cladding tube,
A cladding tube surface treatment device, comprising: a conductive knife type anode contactor; and a slider member advance / retreat drive device for bringing the water seal insulator into contact with the outer peripheral surface of the cladding tube. 10. A coating tube is immersed in an electrolytic solution in an electrolytic cell provided with a cathode member, and the coating tube is used as an anode side to apply a DC voltage between the coating tube and the cathode member. In a cladding tube surface treatment device for forming an oxide film on the surface of a tube, a cladding tube feeding device that is disposed outside the electrolytic cell and sequentially sends a cladding tube to be subjected to surface treatment to a predetermined position; An anode member that holds both ends of the cladding tube that has been sent to the predetermined position in a watertight state so that the electrolytic solution does not enter the inside of the cladding tube, and that contacts the outer peripheral surfaces of both ends of the cladding tube, A pair of cladding tube holding devices, which are disposed in a transport device so that the cladding tubes can move in the surface treatment region, a feeding operation of the cladding tube feeding device, a holding operation of the cladding tube holding device, and a holding release. Operation, and A control device for controlling a transfer operation of the transfer device, wherein the cladding tube holding device includes: a frame member whose periphery is covered by a water seal electric insulating coating member; A housing member mounted so as to project and hold an end of the cladding tube; a collet chuck type anode contactor disposed inside the housing member; and a hollow portion communicating with a fluid supply source. Attached to the housing member to cover the outer peripheral surface of the cladding tube,
A water sealing expansion / contraction insulator for bringing the collet chuck type anode contactor into contact with the outer peripheral surface of the cladding tube by an expanding operation when a fluid is supplied to the hollow portion and holding the outer peripheral surface of the cladding tube in a watertight state. A cladding surface treatment apparatus comprising: a body;