KR100775577B1 - Automated welding equipment and method for the guide thimble plug of the guide thimble tube in the nuclear fuel assembly - Google Patents

Abstract

An automated welding apparatus in a nuclear fuel assembly and a method thereof are provided to improve productivity by automatically transferring a plurality of guide tubes. An automated welding apparatus in a nuclear fuel assembly includes a plug insertion unit(100), a plug supply unit, a welding unit, a processing unit, and a transferring unit. The plug insertion unit has a press(120) and an insertion unit(110). The plug supply unit has a magazine, a gripper, and an air cylinder. The welding unit has a sealing device and a welding torch unit. The processing unit has an incision instrument unit. The transferring unit has a side direction transfer unit having a cam and a driven body, and an axial direction transfer unit having a gripper. The plug supply unit, a plug insertion unit, the welding unit and the processing unit are sequentially arranged. The side direction transfer unit of the transferring unit is located between the plug supply unit and the plug insertion unit, and between the welding unit and the processing unit. The axial direction transfer unit of the transferring unit is attached to the plug insertion unit, the welding unit and the processing unit.

Description

AUTOMATTED WELDING EQUIPMENT AND METHOD FOR THE GUIDE THIMBLE PLUG OF THE GUIDE THIMBLE TUBE IN THE NUCLEAR FUEL ASSEMBLY}

1 is a plan view of the plug press

Figure 2 is a side view of the plug press

Figure 3a is a schematic cross-sectional view of the stopper and the tube before indentation

3b is a schematic cross-sectional view of the stopper and tube after indentation;

4 is a front view of the stopper supply portion

5 is a plan view of the welding portion

6 is a side view of the flange-side sealing device

7 is a cross-sectional view of the front and side of the welding chamber.

8 is a plan view of the processing unit

9 is a cross-sectional view of the stopper

10a is a schematic side view of a lateral conveying means;

10b is a schematic front view of the lateral conveying means;

10c is a front view and a side view of a gripper which is an axial feed means using a pneumatic cylinder;

10d is a side view of a gripper as an axial feed means using a motor and a pulley

11A is a side view of the stopper of the measurement unit

11b is a schematic side view of a press and measurement bundle

The present invention relates to an apparatus and a method for automatically joining a stopper to a guide tube in a manufacturing process of a guide tube which is a main component of a nuclear fuel assembly.

A fuel assembly is a collection of fuel elements that can be treated as a unit rather than as an individual when loading and withdrawing nuclear fuel into a reactor. For example, a fuel assembly for light water reactors (also called a fuel assembly) sinters uranium oxide into pellets and encapsulates about 4 m of fuel in a hollow tube of zircaloy alloy. In the number of reactors, about 230 are quadrangular bundles are provided, and a support plate is provided in which a coolant passes through the top and bottom, and a support grid is provided in the middle to maintain a gap between fuel rods.

The structure that becomes the skeleton in which fuel rods are charged in such an assembly is called a skeletal body, and the skeletal body is composed of parts such as an upper fixing body, a lower fixing body, a guide tube, and a measuring tube, which are joined by welding or mechanical methods. do. The framework is an assembly that serves to maintain the spacing between the fuel rods and to fix the fuel rods in the fuel assembly, which forms the basis of the mechanical structure of the fuel assembly.

In the skeletal body of the guide tube is an internal structural material installed in the reactor vessel for the purpose of smooth entry and exit of the control rod. Starting, stopping, and output adjustment of the reactor are achieved by entering the control rod (neutron absorber) into the core. The guide tube plays an important role, such as forming a flow path to properly position and cool the fuel properly without compromising the integrity of the fuel assembly. It also serves as a passageway for toxic rods and neutral resource rods as well as control rods.

This guide tube is connected to the lower end of the upper fixture, the control rods are introduced into the guide tube at the top of the reactor. The control rods thus entered are stopped in the guide tube without passing through the guide tube when inserted by a stopper bonded to the lower part of the guide tube. Therefore, a stopper must be attached to the guide tube.

The guide tube is structurally designed so that the inner diameter of the lower part is small for absorbing the shock so that the various equipments injected from the upper part are not damaged by the drop. This is to reduce the speed when the control rod falls. In addition, two flow path holes are provided so that the coolant can fill the inside of the guide tube.

The guide tube, which should have such a structure, has a very difficult shape and is very difficult to manufacture by an automatic device. It also has to be manufactured with great precision because it plays a very important role in the reactor.

Therefore, it is necessary to attach the stopper and the like to the guide tube tube to be very precise, it takes a long time when manual work to ensure the quality. However, considering the requirements of the guide, it is inevitable to consider ways to improve productivity.

In the conventional case, the operation of joining the stopper to the guide tube tube was almost manual. This is because, as described above, the shape of the guide tube is not simple, and thus it is not easy to be joined by the automated device.

In addition, in the case of manual work, the length of the guide tube is about 4000 mm and the weight is about 2.5 kg. Thus, when a large amount of the guide tube is worked for a long time, musculoskeletal disorders may occur.

In addition, in consideration of productivity and quality, the work time is long, it is not constant, the productivity is not improved, and if the work is speeded up to improve the productivity, there is a problem that the quality is deteriorated.

Therefore, it was necessary to improve the productivity while maintaining the quality, and to achieve automation so as not to overwhelm the operator.

SUMMARY OF THE INVENTION An object of the present invention is to provide a guide tube stopper automatic joining apparatus and method capable of automating by solving the above-mentioned problems in the stop junction in the manufacturing process of the guide tube of the conventional fuel assembly. Specifically, it has the following purpose.

The present invention provides a bonding apparatus and method for automating the transfer process to prevent the occurrence of musculoskeletal disorders by transferring a large number of guide tubes without effort, and to improve the productivity by automating the entire work process by one operation. It aims to do it.

In addition, an object of the present invention is to provide a guide pipe stopper automatic joining device and a joining method that can maintain the quality and improved productivity by the precise measurement in each process to prevent the degradation of quality that can occur when the productivity is improved. do.

The present invention is a guide tube stopper automatic bonding device of the nuclear fuel assembly has the following configuration.

Stopper indentation unit 100, including a press 120 and the indentation device 110,

Plug supply unit 200, including a magazine 210, a gripper 240 and a pneumatic cylinder 250,

Welding unit 300, including the sealing device (310, 320) and the welding torch bundle 350,

Machining part 400, including a cutting tool bundle 430,

And a conveying part 500 including a lateral conveying means 510 including a cam 512 and a follower 513 and an axial conveying means 520 including a gripper 521,

The apparatus is arranged in the order of the stopper supply 200, stopper indentation 100, welding 300, processing unit 400,

The lateral direction transfer means 510 of the transfer part 500 is located between the stopper indentation part 100 and the weld part 300, the weld part 300, and the processing part 400, respectively.

The stopper indentation unit 100, the welding unit 300, the processing unit 400 is characterized in that the axial feed means 520 of the transfer unit 500, respectively.

 In addition, it further comprises a length measuring unit 600 including a measuring bundle 630 and the probe 631,

The length measuring unit 600 is characterized in that arranged after the processing unit,

It further comprises a control unit configured to include a sensor and a PLC,

The control unit is disposed between each of the above components.

In FIG. 1, the plug press-fitting part 100 includes a press-fitting device 110 formed of a press-fitting plate 111 and a pneumatic cylinder 112, and a press 120 for fixing a tube.

As shown in FIG. 2, the press-fitting device includes a press-fit plate 111 and a pneumatic cylinder 112, the press-fit plate 111 is in contact with the stopper 1 on the front and connected to the pneumatic cylinder 112 on the back, Since the press-fit plate 111 is attached to the joint 113 having the same shape as the outer shape of the stopper, the pressure of the pneumatic cylinder 112 can be transmitted to the stopper 1. The press 120 serves to fix the tube 2 so that the indentation device can press the stopper 1 into the tube 2 and uses a commercially available press that can be generally seen, and the indentation device 110. Located in front of.

By the press-fitting part 100, the stopper 1 and the tube 2 of FIG. 3A are press-fitted into the tube 2 as shown in FIG. 3B. The stopper has a jaw with an outer diameter that is almost equal to the inner diameter of the tube so that the stopper can be inserted into and fixed to the inner diameter of the tube so that when the pressure is applied to the stopper, the stopper is forcibly inserted into the tube. Since the outer diameters have the same diameter, they are firmly engaged without gaps.

The stopper supply unit 200 is illustrated in FIG. 4, and has a role of automatically supplying a stopper to be joined to the tube, and stopper magazine 210, stopper 220, fixed block 230, gripper 240 and pneumatic cylinder. And 250.

The stopper magazine 210 has a stopper inlet 211 at the top and a stopper outlet 212 at the bottom, so that when the stopper is charged at the top, the stopper is stacked in a row from the top to the bottom. The stopper 220 of the planar surface of the stopper magazine 210 blocks the stopper outlet 212, the stopper 220 is advanced by the pneumatic cylinder 221 to open and close the stopper outlet 212. Therefore, by the adjustment of the pneumatic cylinder 221 so that the stopper comes out of the stopper magazine 210 one by one.

The fixing block 230 has a groove 231 located in the lower side of the plug magazine outlet and recessed in a wedge shape, so that the stopper 1 descended by the stopper 220 into the groove 231 of the fixing block. Are accepted. The gripper is placed on the upper side of the fixed block and gripper 240 operated by the pneumatic cylinder 250 is moved to the side to leave the stopper in the press-fit position of the press-fit part 100.

The gripper 240 has two arms 241 that can move from side to side, so that the grippers 240 may be simultaneously gathered by the pneumatic pressure supplied by the pneumatic cylinder to hold the plug. The pneumatic cylinder 250 is mounted on the side of the gripper 240.

The welding part 300 serves to weld the press-fitted interlocking tube 2 and the stopper 1, as shown in FIG. 5. The welding part 300 is a flange side sealing device 310 for sealing the tube on the opposite side of the stopper in the tube, the chamber side sealing device 320 for sealing the tube on the same side as the stopper in the tube, the welding chamber 330, the tube chuck 340, the vacuum valve and argon valve, the welding torch bundle 350, the servo motor 360 is configured.

The sealing devices 310 and 320 are devices for sealing the tube as a whole on the flange side (opposite the stopper with respect to the tube) and the chamber side, respectively. Flange-side sealing device 310 is shown in Figure 6, located on the opposite side to the welding chamber 330 relative to the tube, it can be inserted into the inside of the tube at the top and the sealing ring 312 is mounted at the end It has a long sealing bar (311), the motor 313, the pulley 314, the rail 315 is installed in the lower can be pulled by the pulley to be rotated by the motor to move forward and backward along the rail. When the flange-side sealing device 310 is advanced to insert the long sealing bar 311 into the tube, the volume of the sealing ring 312 attached to the end of the sealing bar expands to seal the inside of the tube to seal the inside of the tube. .

Hereinafter, referring to FIG. 7, the chamber-side sealing device 320 is a ring-shaped component attached to the tube inlet 331 of the welding chamber, and when the sealing device is operated, the volume of the ring is expanded to wrap the outer diameter of the tube to weld it. The chamber 330 and the tube are sealed. The tube is completely sealed at both ends by the flange side and chamber side tube sealing devices.

The welding chamber 330 has a receiving space in which the tube can be welded, and has a structure having a welding torch bundle and two openings 331 and 332 through which the tube can flow in and out. The tube inlet 331 is coaxially positioned with the tube 2, and the weld torch bundle inlet 331 is positioned perpendicular to the tube so that the welding torch 351 can be welded perpendicularly to the tube.

Tube chuck 340 is a device that can rotate while holding the tube is connected to the servo motor 360 and the piping belt is a rotatable structure. The tube chuck 340 is located at the tube inlet 331 side of the welding chamber.

The vacuum valve creates a vacuum by sucking air in the sealed welding chamber and tube, and the argon valve supplies inert gas, argon gas, to the welding part to create an inert atmosphere during TIG welding.

The welding torch bundle 350 is a component including a welding torch 351 at the bottom thereof, and a pneumatic cylinder 352 is positioned at a side thereof, and the pneumatic cylinder 352 when the pneumatic cylinder 352 is operated as shown in the left side of FIG. 7. The welding rod 351 is vertically moved by the connecting rod 353 and the joint connected to the welding rod to move the welding torch 351 up and down to approach the welding torch to weld.

Servo motor 360 is a commercially available motor that is connected to the chuck by a timing belt to enable rotation of the chuck.

Machining unit 400 is a device for properly processing the entire length of the guide tube is attached to the stopper shown in Figure 8, a tool bundle comprising a stopper 410, tube chuck 420, cutting tools and tool bars 430, the servo motor 440 is included.

Referring to Figure 9, the stopper 410 serves to position the tube to stop at the machining position, it is located on the opposite side to the cutting tool relative to the tube on the workbench. The stopper 410 has a pneumatic cylinder 411 attached to the bottom to move up and down, and a small sliding rail 413 to allow the stop bar 412 to move slightly in the axial direction of the tube. It is formed and connected to the pneumatic cylinder, and includes a stop bar (412) protruding round to engage the tube. The stop bar 412 protrudes toward the tube side.

The chuck 420 and the spindle motor, the cutting tool bundle 430 including the cutting tool is the same as the components mounted on a general lathe, and thus the detailed description and illustration are not shown. However, the chuck 420 fixes the tube, rotates by biting the tube by the rotation of the spindle motor, and the cutting tool is advanced by the servo motor to the tube side during the injection of nitrogen gas, which acts as a cooling machine, to process the tube. I'm going to the rescue. However, it is preferable that the device automatically inputs a CNC program to perform precise work.

The transfer part 500 serves to move the tube to each device, and the lateral transfer means 510 for moving the tube in the axial and vertical sides of the tube and the axial transfer means 520 for the axial movement of the tube. )

The lateral conveying means 510 is shown in Figs. 10a and 10b, the motor 511 installed on the lower part of the workbench, the cam 512 connected to the shaft of the motor, the follower 513 in contact with the cam surface and interlocked with the cam It consists of a cam device consisting of, and a plurality of parallel and unidirectionally inclined plate and tube guide 514 made by simply arranged in the advancing direction of the tube. 10A is a schematic side view of the lateral transfer means 510, and FIG. 10B is a schematic front view.

In FIG. 10B, the follower 513 contacts the cam surface with the roller 515 and moves up and down between the top dead center and the bottom dead center by the rotation of the cam. The follower has a number of blocks 514 connected to the follower. The number and location of the blocks depends on the action of processing the tube in each device, and what is shown in FIG. 10B is just one embodiment. The block moves up and down according to the movement of the follower.

The number and shape of the stages of the tube guide 514 also depend on the action of processing the tube in the respective devices, and only one embodiment is shown in FIG. 10B.

Axial conveying means 520 is shown in Figure 10c, each of which is coupled to the body by a hinge (bearing to enable rotational movement of the two objects by surface contact) 523, the hinge by the pneumatic axis It is composed of a gripper 521 having an arm 522 branched to the left and right rotational movement, a pneumatic cylinder for transmitting pneumatic pressure to the arm of the gripper, and a pneumatic cylinder 524 for movement of the gripper connected to the lower part of the gripper body. . However, the configuration for the movement of the gripper is not necessarily made of a pneumatic cylinder, but may be composed of a motor 525 and a pulley 526 as shown in FIG. In this case, the pulley 526 connected to the chain by the motor is rotated by controlling the rotation of the motor 525 to move the gripper connected to the pulley and the chain.

The left and right arms 522 of the gripper move simultaneously and move up and down together. Thus, the arm of the gripper that rotates and rises at the same time can grasp the tube. In addition, the arm rotated down at the same time is able to place the tube.

The transfer part 500 is located between each component and each component. Lateral transfer means 510 is positioned between the plug indentation part 100 and the welding part 300, the welding part 300, and the processing part 400, respectively, and the plug indentation part 100, the welding part 300, and the processing part ( Axial feed means 520 are respectively mounted to 400.

Measuring unit 600 is shown as a welded portion in Figure 8, after welding the stopper is a device for measuring the length of the final tube after processing for the entire length. The apparatus comprises a stopper 610, a fixed press 620, a measuring bundle 630 and a probe 631.

The stopper 610 is illustrated in FIG. 11A, and has an accommodating part 611 that receives and fixes one end of the tube on the top thereof and is fixed to the side opposite to the measurement bundle 630 based on the tube.

In the measuring unit 600, the stopper is stopped by the stopper by the axial feed means 520, and the fixed press 620 presses and fixes the stopped tube. Then, in the direction opposite to the stopper 610, the measuring bundle 630 is advanced toward the tube by the pneumatic cylinder 632, and the measuring probe 631 attached to the measuring bundle measures the length.

The controller is connected to the above devices and controls the operation of the devices, and includes a programmable logic controller (PLC) having a control program that receives signals from the proximity sensor and the optical sensor and sends signals to the devices. Consists of PLC refers to the control means and controls the automated process by the built-in program. The control unit used general control devices used in the automation device, and thus not illustrated.

Hereinafter, the operation of the above components of the present invention will be described through embodiments.

The tube 2 to press the stopper is rolled down the side along the inclined surface of the inclined tube guide 515. The tube stops at the stage between the tube guides and is detected by the proximity sensor installed at the stage.

When the tube is detected in the above, the motor 511 connected to the cam 512 mounted on the lower side of the work table is operated and the cam 512 rotates. The follower 513 in contact with the cam rises from the bottom dead center to the top dead center, and when it reaches the top dead center, the block 514 connected with the follower rises at the same time to lift the tube stopped at the end of the tube guide. Raise the stage.

The tube (2) raised in the unit rolls down the inclined surface of the tube guide and is blocked by the block 514 that has not yet descended. When the cam 512 rotates to reach the bottom dead center, the follower 513 and the block 514 The lowering, the tube is accommodated in the groove which is a receiving space formed between the inclined surface and the end.

The received tube is detected by the proximity sensor, the gripper 520 is operated to grasp the tube, at the same time the stopper 220 located at the bottom of the magazine in the magazine 210 of the guide tube plug supply is applied to the pneumatic cylinder 221 Take the stopper outlet 212 to open and close the stopper 1 from the magazine one by one.

Guide plug stopper gripper 240 catches the stopper when the stopper 1, which has come out one by one, is received and stopped in the wedge-shaped recess 231 in the block 230. The guide tube stopper gripper 240 moving by the pneumatic cylinder 250 by the pneumatic pressure to hold the stopper (1) to move horizontally to move up and down again to transfer the stopper to the indentation position to place the stopper.

The tube is moved forward to the press-fitted position and then stopped, and the press 120 descends to press the tube to firmly fix the tube 2. In the fixed tube, the press-fit device 110 moves forward like the stopper 1 fitted to the joint 112 connected to the push-in plate 111 to align the stopper with the tube, and then continuously advances the stopper 1 to the tube (2). Press in).

When the stopper 1 is press-fitted (2), the press-in apparatus 110 is reversed, the press 120 is raised, and the gripper 521 holding the tube is reversed and before the tube is transferred in the axial direction. Transfer to position and release tube.

The tube (2) is moved up the stage by the operation of the cam device, the tube guide 515 is transported in the lateral direction and conveyed to the next device. The conveyed tube is received in the groove formed at the end as described above, and the gripper grasps the tube and advances the tube to the welding position.

The chuck bunch 340 grasps and fixes the tube stopped at the welding position, and the flange-side sealing device 310 of the tube is advanced toward the tube and the sealing bar 311 enters the tube. The flange side sealing device 310 and the chamber side sealing device 320 operate to seal the inside of the tube, and the vacuum valve operates to bring the inside of the tube into a vacuum state.

The argon gas is injected from the argon gas valve into the vacuum of the welding chamber 330 and the tube, and the bundle of the welding torch 350 descends. At the same time, the servo motor 360 is rotated so that the chuck bundle 340 connected to the servo motor is rotated by the timing belt, so that the tube 2 is rotated and the indentation portion of the tube and the stopper is welded.

When the welding is completed and the tube is cooled, the servomotor is stopped and the weld torch bundle is raised. The chuck is released, the sealing devices 310 and 320 release the sealing, and the flange side sealing device 310 is separated from the tube and retracted.

The gripper grasps the tube 2, which is free to move, moves backwards to the position before welding, and the gripper is released. The cam device then operates to transfer the tube to the next device in the same manner as described above.

The tube received in the groove formed at the end of the tube guide of the next device is held by the gripper to advance the tube. The stopper 410 located on the flange-side extension line of the tube is raised, the tube is reversed again by the gripper 521, and comes into close contact with the stopper 410 and stopped.

The chuck 420 grasps and stops the stopped tube. When the tube is fixed, the chuck rotates, nitrogen gas is injected, and the tool bundle 430 processes the entire length according to the CNC program.

When the processing is completed, nitrogen gas injection stops, and the rotation of the chuck also stops. When the gripper grabs the tube and moves forward, and the stopper 410 is lowered, the gripper reverses again, transfers the tube to its original position and releases the tube, and the tube is transferred to the next device by the cam device.

The conveyed tube makes the tube close to the stopper 610 by reversing the tube until the gripper 521 is fixed and fixed to the stopper 610. At this time, the stationary press 620 is fixed to the stationary tube is lowered and firmly fixed, the measurement bundle 630 is advanced to the tube side. Then the measuring probe 631 in the measuring bundle 630 is operated to measure the length of the tube.

When the measurement is completed, the measurement bundle 630 is reversed. At this time, if the measured result is out of the allowable range, the device is stopped and until the appropriate action is taken. On the contrary, if the measured result is within the allowable range, the tube is transferred to the original position and the work is completed and transferred to the stacked stock pile.

The present invention also relates to a method for automatically guiding a stopper of a guide tube of a fuel assembly.

Plug indentation process made in the indentation apparatus 110 for supplying and indenting the stopper to be welded to the tube to one end of the tube,

Plug welding process made in the welding portion 300 for welding the press-fitted plug to the tube,

Length processing process made in the processing unit 400 for processing the entire length of the welded tube,

The length measuring process made in the measuring part 600 is performed in order.

Stopper indentation process is a process of pressing the stopper into the tube one by one when the tube is supplied to combine. In this process, the tube is press-fitted by pressing the stopper into the tube with a press-fit device 110 which presses the tube and pressurizes it by a pneumatic cylinder.

The stopper welding process is a step of welding and joining a part press-fitted and joined in the welding chamber 330 when the stopper tube is press-fitted. This process is welded by an interference fit welding method by indentation. Thus, the inner jaw is created by the press-fit method inside the tube. However, because the position of the stopper corresponds to the end of the tube, even if the inner jaw does not affect the control rod to be inserted into the guide tube does not require a separate processing process.

The length machining process is a process in which the entire length of the guide tube is processed to an appropriate length to be put in the nuclear fuel assembly in the processing unit 400 after the stopper is completed. This process is automatically cut by CNC, and the guide tube tube supplied is automatically transferred to the CNC machining equipment.

The length measuring process measures the length of the tube supplied to the length measuring part 600. The length of the tube after the length machining process after the stopper welding is measured by the measuring probe 631. When the measured length is within the allowable value, the process proceeds to the next process. However, when the measured length exceeds the allowable value, the process is stopped. When the operator takes action to remove the incorrectly processed tube, the work is resumed.

Each of the above processes is performed in the order of a plug indentation step, a plug welding step, a length machining step, and a length measurement step.

The present invention is not necessarily limited to the above devices and process steps. The same result can be achieved with devices that perform similar actions. What is shown in the present invention is only one embodiment containing the technical idea of the present invention.

Below is a look at the effect of the present invention achieved by the present invention.

The present invention has automated the transfer process to transfer a large number of guide tube tubes effortlessly, and improved productivity by automating the entire work process by one operation. As a result, a large number of guide tube tubes can be joined with a stopper, and can prevent musculoskeletal disorders that can occur in an operator.

In addition, the present invention can achieve an optimized production process by precisely measuring in each process to prevent the degradation of quality that can occur when the productivity is improved to maintain the productivity and quality by automation.

Claims (13)

Stopper indentation unit 100, including a press 120 and the indentation device 110, Plug supply unit 200, including a magazine 210, a gripper 240 and a pneumatic cylinder 250, Welding unit 300, including the sealing device (310, 320) and the welding torch bundle 350, Machining part 400, including a cutting tool bundle 430, And a conveying part 500 including a lateral conveying means 510 including a cam 512 and a follower 513 and an axial conveying means 520 including a gripper 521, The apparatus is arranged in the order of the stopper supply 200, stopper indentation 100, welding 300, processing unit 400, The lateral direction transfer means 510 of the transfer part 500 is located between the stopper indentation part 100 and the weld part 300, the weld part 300, and the processing part 400, respectively. Guide plug stopper automatic joining device of the nuclear fuel assembly, characterized in that the stopper indentation unit 100, the welding unit 300, the processing unit 400, the axial feed means 520 of the transfer unit 500, respectively. The method of claim 1, Further comprising a length measuring unit 600 including a measuring bundle 630 and a probe 631, The length measuring unit 600 is a guide pipe stopper automatic bonding device for a nuclear fuel assembly, characterized in that arranged after the processing unit. The method according to claim 1 or 2, A guide tube stopper automatic bonding device for a nuclear fuel assembly, characterized in that further comprising a control unit including a sensor and a PLC. The method of claim 1, The stopper indentation unit 100 is a press-fit device 110 consisting of a press-fit plate 111 and a pneumatic cylinder 112 connected to the back of the press-press plate 111, Located in the front of the indentation device 110 and guide tube stopper automatic joining device comprising a press (120) for fixing the tube. The method of claim 1, The stopper supply unit 200 is a stopper magazine 210 having an inlet 211 and an outlet 212, a stopper 220 mounted to open and close an outlet 212 at the bottom of the magazine, and a fixed block located at the bottom of the stopper ( 230), gripper 240, guide pipe stopper automatic bonding device, characterized in that comprises a pneumatic cylinder (250). The method of claim 1, The welding part 300 is a flange-side sealing device 310 located in the front of the welding chamber 330, the chamber-side sealing device 320 attached to the tube inlet in the front of the welding chamber 330, the welding chamber 330 ), A tube chuck 340 installed before the chamber-side sealing device on the front side of the welding chamber, a weld torch bundle 350 connected to the upper surface of the welding chamber 330, and a servo motor 360 installed on the side of the welding chamber. Guide plug stopper automatic bonding device, characterized in that made. The method of claim 1, The processing unit 400 is a tool bundle 430 including a stopper 410 installed at the front end of the cutting table, a tube chuck 420 installed at the front of the tool bundle, a cutting tool and a tool post located at the rear of the cutting table. , Guide pipe stopper automatic bonding device comprising a servo motor 440 located on the rear of the tool bundle. The method of claim 1, The transfer part 500 is composed of a lateral transfer means 510 for the transfer in the lateral direction of the tube and the axial transfer means 520 for the axial transfer of the tube, The side conveying means 510 is a cam device composed of a cam 512 for moving the tubes one by one to the next process and a motor 511 and a follower body 513 which is in contact with the cam, and a plurality of parallel paths of the tubes. And it comprises a tube guide 515 made of only one plate inclined in the advancing direction of the tube, The axial feed means 520 is a nuclear fuel assembly characterized in that it comprises a gripper 521 for holding the tube consisting of the body and the arm to move forward and backward in the axial direction, pneumatic cylinder 524 for moving forward and backward of the gripper Guide plug auto splicer. The method of claim 1, The transfer part 500 is composed of a lateral transfer means 510 for the transfer in the lateral direction of the tube and the axial transfer means 520 for the axial transfer of the tube, The side conveying means 510 is a cam device composed of a cam 512 for moving the tubes one by one to the next process and a motor 511 and a follower body 513 which is in contact with the cam, and a plurality of parallel paths of the tubes. And it comprises a tube guide 515 made of only one plate inclined in the advancing direction of the tube, The axial feed means 520 is connected to the gripper 521, the gripper 521 to move forward and backward in the axial direction by holding the tube consisting of the body and the arm pulley 526 and the motor 525 to move forward and backward of the gripper Guide pipe stopper automatic bonding device for a nuclear fuel assembly characterized in that it comprises a). The method of claim 6, The flange-side sealing device 310 may be inserted into the inside of the tube on the front and includes a sealing bar 311 is mounted to the sealing ring 312 at the end and the motor 313 and the motor 313 at the bottom Connected pulley 314), characterized in that comprises a rail 315, The chamber side sealing device 320 is a guide pipe stopper automatic splicing apparatus, characterized in that consisting of a ring which is attached to the tube inlet of the welding chamber and the volume increases. The method of claim 6, The welding torch bundle 350 has a welding torch 351 in the center portion, a pneumatic cylinder 352 installed on the side of the welding torch bundle, a connecting rod 353 connected to one side of the middle portion of the welding torch and the other side of the pneumatic cylinder. Guide pipe stopper automatic bonding device for a nuclear fuel assembly characterized in that comprises a Stopper indentation process made in the indentation apparatus for supplying and injecting the stopper to be welded to the tube to one end of the tube, Plug welding process made in the welding part for welding the press-fitted plug to the tube, A method of automatically joining a guide tube stopper for a nuclear fuel assembly, characterized in that a length machining step is performed in sequence in a machining portion for processing the entire length of a welded tube. The method of claim 12, After the processing process is made further comprises a length measuring process, The length measuring process is to proceed to the next step if the length after the processing is allowed, but if the length exceeds the tolerance, the guide tube stopper automatic joining method of the nuclear fuel assembly characterized in that the process.

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