JP3337701B2 - Pipe end cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube end for manufacturing a tube of a predetermined length by cutting the end of a long tube such as a cladding tube of a fuel rod mounted on a large number of nuclear fuel assemblies. It relates to a cutting device.

[0002]

2. Description of the Related Art Conventionally, when cutting the end of a cladding tube of this type, a general-purpose lathe is used, and after positioning the center of a ring-shaped chucking mechanism through the cladding tube, the chucking mechanism is cut. With the cladding fixed by
The end of the cladding tube was cut by a turning tool of the general-purpose lathe by rotating the cladding tube.

[0003]

However, when the cladding tube is cut as described above, the cladding tube is moved through the center of the chucking mechanism when the cladding tube is positioned. The amount is large, it takes time to position, and the cladding tube is easily scratched, and because the cut end of the cladding tube is not held at the time of cutting, it takes time to collect the scattered chips. There's a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to quickly and surely perform a positioning operation of a tube for cutting an end portion and to make a tube in a sound state. Tubes that can be cut with
An object of the present invention is to provide an edge cutting device. Another aspect of the present invention
The target is to easily collect the stubs generated during cutting.
To provide a pipe end cutting device capable of cutting.

[0005]

In order to achieve the above object, a first aspect of the present invention is a tube end cutting apparatus for cutting a tube end to produce a tube of a predetermined length. a tube positioning means for adjusting the position is moved in its longitudinal direction, a tube holding means for detachably holding the tube positioned outside of the tube
And rotate it around the outer circumference of the tube to cut the tube.
Cutting blade that supports the cutting blade,
Moving the cutting arm in the longitudinal direction of the
And an interlocking member for cutting the cutting blade into the tube.
It is characterized by having. Further, a second aspect of the present invention, Ju
The tube is cut using a cutting blade cut into the tube.
And a piece holding means for holding and moving the cut end .

[0006]

According to claim 1 of the pipe end cutting device of the present invention,
After adjusting the movement of the tube in the longitudinal direction by the tube positioning means, the tube is fixed by the tube holding means, and then the cutting blade is moved to the cutting position of the tube.
The tube is cut, and the cutting blade is rotated around the tube to cut the tube smoothly. According to the second aspect of the present invention, by holding the cut end of the tube by the cut holding means, the cut generated at the time of cutting is collected at a predetermined place without scattering.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIGS. 1 and 2 are front views showing a cladding tube end cutting apparatus 30 according to an embodiment of the present invention.

In the pipe end cutting device 30, the gantry 3
A base 301 is laid on the base plate 00, and a slide block 302 is mounted on the base 301 so as to be horizontally movable. A pair of stoppers 303 and 304 are provided at both ends of the guide rail of the slide block 302, and an air cylinder 306 is horizontally arranged via a bracket 305 adjacent to the stopper 304. A moving body 307 is mounted on the slide block 302, and the tip of the piston rod of the air cylinder 306 is screwed into the moving body 307. A cylindrical body 308 is attached to the moving body 307, and an air cylinder 310 is attached to a base end of the cylindrical body 308 via an attachment member 309. Further, a push rod 311 is screwed to the distal end of the piston rod of the air cylinder 310. The push rod 311 is formed inside a support shaft 312 having a base end supported by the mounting member 309. It is mounted in the mounting hole 313. Both ends of the pin 314 mounted on the tip of the push rod 311 are connected to the mounting holes 31 of the support shaft 312.
A tube guide 316 is removably screwed into the small diameter portion of the end of the support shaft 312. Furthermore, the distal end of the support shaft 312 and the tube guide 31
6 is provided with a hollow tube pushing member 317, and a pair of long holes 318 formed in the body of the tube pushing member 317 has a pin 319 attached to the distal end of the support shaft 312. Are inserted at both ends. And
A spring 320 for urging the tube pressing member 317 toward the distal end is provided between the pin 314 and the tube pressing member 317 and on the outer periphery of the support shaft 312.

A hollow rotary shaft 323 is rotatably supported between the cylindrical body 308 and the support shaft 312 via a pair of bearings 321 and 322, respectively. A pulley 324 is attached to the end. A pulley 327 mounted on a rotating shaft of a motor 326 mounted on the cylindrical body 308 via a bracket 325 is connected to the pulley 324 via a belt 328. A tapered ring 329 (an interlocking member) is provided near the tip of the rotating shaft 323 so that the key 3 can be moved in the axial direction by a predetermined distance and cannot rotate around the axis.
30 and the tapered ring 329
The tapered ring pusher 331
Are provided via a bearing 332. The moving shaft 334 of the linear motor 333 is connected to the tapering pusher 331. Further, a cutting arm 337 is provided at the tip of the rotating shaft 323 via a bearing member 335 and a bearing shaft 336 so as to be rotatable about the bearing shaft 336. , A cutting blade 339 is attached via a fixing member 338. A rotary roller 340 is provided at the base end of the cutting arm 337.
0 and the cutting arm 337 between the bearing shaft 336,
In FIG. 1, the cutting arm 337 is connected to a bearing shaft 336.
Mechanism 341 for urging clockwise around the center
Is provided. Furthermore, the taper ring 32
9 is a guide path 342 that rolls and guides the rotation roller 340.

A base 344 laid on the gantry 300
, A slide block 345 is slidably provided,
A stopper 346 is provided at one end of the guide rail of the slide block 345, and an air cylinder 348 is provided at the other end thereof via a bracket 347.
A support member 349 is provided on the slide block 345, and the tip of the piston rod of the air cylinder 348 is screwed to the support member 349. The support member 349 has a micrometer 3
50 is installed horizontally, and this micrometer 35
A contact plate 351 that contacts the end face of the cladding tube T is connected to the leading end of the zero. Then, the contact plate 351 contacting the end face of the cladding tube T is operated by the micrometer 350.
The position is finely adjusted. Further, a tube holding mechanism 352 for detachably holding the covering tube T is provided between the contact plate 351 and the tube guide 316 and the tube pressing member 317.

A series of movements in the pipe end cutting device 30 will be described with reference to FIGS. 3 to 8. First, as shown in FIG. 3, the abutment plate 351 and the tube guide 316,
In a state where the tube pressing member 317 and the cutting blade 339 are separated from each other, and the tube holding mechanism 352 is opened, the tube is fed from a direction perpendicular to its longitudinal direction by a cladding tube supply device (not shown). 4, the piston rod of the air cylinder 348 is advanced with respect to the cladding tube T, and the slide block 345 is moved to the stopper 346.
, The end surface of the cladding tube T is pushed by the contact plate 351 to stop the cladding tube T at a predetermined position. In this case, in order for the contact plate 351 to position the cladding tube T at a predetermined position, the stopper 346 and the micrometer 350 are adjusted in advance to set the forward end position of the piston rod of the air cylinder 348. deep.

Next, as shown in FIG. 5, by moving the piston rod of the air cylinder 306 forward and sliding the slide block 302 until it comes into contact with the stopper 303, the cutting blade 339 is moved to the cutting position.
The tube guide 316 is inserted inside the cladding tube T. At this time, the tube pushing member 317 located outside the tube guide 316 also moves together with the tube guide 316 until it comes into contact with the end face of the cladding tube T, but the tube pushing member 317 contacts the end face of the coating space T. When contacted, the movement is blocked and stopped in a state against the urging force of the spring 320, and only the tube guide 316 protrudes from the inside of the tube pushing member 317 and enters the cladding tube T. In this manner, by operating the air cylinder 306, the cutting blade 339 is moved to the cutting position, and at the same time, both ends of the cladding tube T are brought into contact with the abutment plate 351 and the tube pushing member 3.
17, the cladding tube T can be positioned.

In this state, as shown in FIG. 6, the tube holding mechanism 352 is operated to securely hold the cladding tube T, the piston rod of the air cylinder 310 is retracted, and the push rod 311 and the pin 314 are moved. By moving to the right, the compression of the spring 320 is released and the pressing force on the cladding tube T by the tube pushing member 317 is removed, and then the moving shaft 334 of the linear motor 333 is moved to the cladding tube T side. By moving the taper ring 329 to the distal end side via the taper ring pressing tool 331 and the bearing 332, the rotary roller 340 is lifted up along the guide path 342 of the tapered ring 329 at the distal end, and the cutting arm 337 is moved. Is rotated counterclockwise about the support shaft 336 so that the cutting blade 339 at the tip of the cutting arm 337 approaches the outer peripheral surface of the cladding tube T. While, the pulley 327 drives the motor 326, a belt 328, via the pulley 324 rotates
By rotating the shaft 323 , the cutting blade 339 is rotated around the cladding tube T. As a result, at the predetermined cutting position of the cladding tube T, the end of the cladding tube T is smoothly cut by the cutting blade 339.

Next, after stopping the rotation of the motor 326 and stopping the rotation of the cutting blade 339 around the cladding tube T, the piston rod of the air cylinder 306 is retracted as shown in FIG. By sliding the cutting blade 302 until it comes into contact with the stopper 304, the cutting blade 3
With the cut end of the cladding tube T mounted around the tube guide 316 sandwiched between the tube 39 and the tube pushing member 317, the cladding tube T is separated from the cladding tube T held by the tube holding mechanism 352. Subsequently, as shown in FIG. 8, the tube holding mechanism 352 is opened to put the cladding tube T in a free state, and the piston rod of the air cylinder 348 is retracted to move the plate 351 away from the cladding tube T. , The moving shaft 334 of the linear motor 333 is pulled away from the cladding tube T side, and the tapering pusher 331 and the bearing 332 are separated.
The tapered ring 329 is moved to the base end side via the
The rotating roller 340 is lowered along the axis 42 and the cutting arm 337 is rotated clockwise about the support shaft 336 so that the cutting blade 339 at the tip of the cutting arm 337 is moved from the outer peripheral surface of the cladding tube T. Separate. At the same time, the piston rod of the air cylinder 310 is advanced,
By pushing the tube pushing member 317 forward along the tube guide 316 through the push rod 311, the pin 314, and the spring 320, the cut end of the cladding tube T attached to the tube guide 316 is pushed out, and the collection container 353
Drop inside and collect.

As described above, the end is cut to obtain a cladding tube T having a predetermined size. In this case, since the cutting blade 339 is rotated while the cladding tube T is fixed, the cladding tube T is not scratched, and the cutting blade 339 is advanced to the cutting position. Since the cladding tube T is positioned while being sandwiched between the abutment plate 351 and the tube pushing member 317, the positioning time of the cladding tube T can be shortened, and the throughput can be improved. Further, after the cladding tube T is held at the cutting position by the tube holding mechanism 352, the push rod 311 is retracted to press the cladding tube T against the plate 351 side.
By retracting 20, the pressing force of the tube pressing member 317 on the cutting blade 339 during cutting can be eliminated. Thereby, the cutting blade 339 is formed.
The interference between the cutting edge and the cut end is eliminated, and the life of the cutting blade 339 can be extended. Further, since the cut piece is attached to the tube guide 316 and moved to a predetermined position and then discharged, the cut piece can be easily processed. Furthermore, by exchanging the tube guide 316, it is possible to easily cope with cladding tubes T having different dimensions. In the above embodiment, the spring 320 has been described as being freely mounted around the support shaft 312 between the pin 314 and the tube pushing member 317.
20 is fixed and the spring 320 is forcibly retracted together with the retraction of the pin 314, so that the spring 320 does not retreat for any reason. 317 prevents the pressing force from continuing to work,
The interference between 9 and the scrap may be completely prevented.

[0017]

As described above, according to the first aspect of the present invention,
In a tube end cutting apparatus for cutting a tube end to produce a tube of a predetermined length, a tube positioning means for adjusting the position by moving the tube in the longitudinal direction, and detachably holding the tube Means for holding the tube and an outer periphery of the tube positioned outside the tube
A cutting blade that rotates around and cuts the tube, and a cutting blade
The cutting arm that supports the
The cutting arm is linked to the tube by linking the cutting arm
Since is obtained; and a coupling member to cut, after moving adjusting tube in its longitudinal direction by a tube positioning means, the tube is fixed by the tube holding means, then, write off the cutting blade to the cutting position of the tube
By rotating the cutting blade along the circumference of the tube to cut the tube smoothly, the operation of positioning the tube for cutting the end can be performed quickly and reliably, and the tube can be sounded. Can be cut in state.

Further, the second aspect of the present invention is to cut into a tube.
Cut the cut end of the tube using the cutting blade
Since the piece holding means for holding and moving is provided, by holding the cut end of the tube by the piece holding means, the piece generated at the time of cutting does not scatter, and this piece is placed in a predetermined place. It can be easily collected.

[Brief description of the drawings]

FIG. 1 is a front view showing a left half of a pipe end cutting device according to an embodiment of the present invention.

FIG. 2 is a front view showing a right half of the pipe end cutting device according to one embodiment of the present invention.

FIG. 3 is an explanatory view showing an initial state (cladding tube receiving) state of the pipe end cutting device according to one embodiment of the present invention.

FIG. 4 is an explanatory diagram showing advance of the plate.

FIG. 5 is an explanatory view showing advance of the cutting device.

FIG. 6 is an explanatory view showing a holding and cutting operation of the cladding tube.

FIG. 7 is an explanatory view showing retreat of the cutting device.

FIG. 8 is an explanatory view showing release of holding of the cladding tube, retraction of the plate, and discharge operation of a cut end.

[Explanation of symbols]

 T Coated tube (tube) 30 Tube end cutting device 316 Tube guide (cut end holding means) 339 Cutting blade 351 Applicable plate (tube positioning means) 352 Tube holding mechanism (tube holding means)

──────────────────────────────────────────────────続 き Continuing on the front page (72) Katsumori Suzuki, Inventor Katsumori Suzuki, Tokai-mura, Naka-gun, Ibaraki Prefecture 622 1 Tokai Works, Mitsubishi Nuclear Fuel Co., Ltd. (72) Inventor Shinichiro Nakahara, Tokai-mura, Naka-gun, Ibaraki 622 Ishikawa 1 Mitsubishi Nuclear Fuel Co., Ltd. Tokai Works (72) Inventor Jun Kido 1-14-16 Kudankita, Chiyoda-ku, Tokyo Techno-Otenai Co., Ltd. (72) Inventor Koichi Nemoto 1, Kudankita 1-Chiyoda-ku, Tokyo 14-16 Techno Oteuchi Co., Ltd. (56) References JP-A-58-132411 (JP, A) JP-A-58-113414 (JP, U) JP-A-61-99421 (JP, U) JP-A-56 −72616 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B23D 21/04 B26D 3/16

Claims (2)

(57) [Claims] 1. A tube end cutting device for manufacturing a tube of a predetermined length by cutting an end of the tube, a tube positioning means for adjusting a position by moving the tube in a longitudinal direction thereof, and attaching and detaching the tube. Tube holding means for holding as possible , located outside the tube and
Cut around the outer circumference of the tube to cut the tube
A cutting blade, a cutting arm for supporting the cutting blade,
Moving the cutting arm in the longitudinal direction of the
And an interlocking member for cutting the cutting blade into the tube . 2. Using a cutting blade cut into a tube.
The tube end cutting device according to claim 1, further comprising cutting end holding means for holding and moving the cut end of the tube.