JPH0732974B2 - Pipe end adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a pipe end refining treatment suitable for pipe end treatment of a pipe such as a nuclear fuel cladding pipe made of a zirconium alloy which requires extremely strict finishing accuracy. Regarding the device.

[Conventional technology]

It goes without saying that in the tube end finishing of the nuclear fuel cladding tube made of zirconium alloy, sufficient processing accuracy is required to satisfy the manufacturing specifications of the tube. However, on the other hand, no matter how high the accuracy of each processing method, there is a risk that the tube may be damaged during processing. In other words, it is considered that the final product accuracy and efficiency throughout the processing are more important than the accuracy and efficiency in individual processing.

From this point of view, the method disclosed in Japanese Patent Application Laid-Open No. 62-208801 is one in which a highly accurate, highly efficient and stable pipe end finishing method has been completed by a clever combination of a plurality of processes. However, a specific example of equipment arrangement is described in FIG. 1 of the publication. That is, the clamper that clamps the pipe moves in the pipe conveying direction orthogonal to the pipe axis, and the cutting machine, the end surface processing machine, the outer chamfering machine, and the inner chamfering machine are arranged along the movement path.

[Problems to be Solved by the Invention]

However, when a small-diameter long pipe is traversed by this device, the pipe end position shifts, and the crossing of the length of the final product (this crossing is ± 0.3 m for 4 m in the case of nuclear fuel cladding pipe made of zirconium alloy, for example)
m is extremely strict) sometimes cannot be satisfied. Further, in order to completely prevent the displacement in the pipe axis direction, a highly accurate clamper and its moving device are required, which causes a problem such as an increase in device cost.

In order to solve such a problem, it is an object of the present invention to provide a pipe end adjusting device capable of performing cutting to chamfering on a pipe end while the pipe is being plumbed.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the pipe end adjusting apparatus of the present invention comprises a traverse means (1) for traversing the pipe in a direction orthogonal to the pipe axis, as shown in FIGS. 1 and 2. A first idle roller row (11) and a first idle roller row (11), which are arranged in parallel in the traverse path of the pipes from the upstream side to the downstream side with an aligning conveyor (44) sandwiched therebetween, and which respectively movably support the pipes in the pipe axis direction, The second idle roller row (45) and the first and second idle roller rows (11, 45) respectively, and the charging / extracting device (12, 46) for feeding the pipe in the tube axial direction, Fixed chuck device (27,56) provided on the opposite tip sides of the first and second idle roller rows (11,45) to fix the pipe, and further provided on the tip side of the fixed chuck device (27,56) And a cutting machine, an end surface processing machine, a surface that moves in the pipe axis direction on a common bed that moves horizontally in the direction orthogonal to the pipe axis. And a pipe end processing device (39, 57) in which the central heights of the machines are equalized and are sequentially mounted in the bed moving direction, and the charging / extracting device (12) is installed on the first idle roller row (11). The pipe is loaded into the pipe end processing device (39) on the one end side by means of the loading / extracting device (46) on the second idle roller row (45), and the pipe end processing device (57) on the other end side is loaded. ), The other end of the pipe is processed, and at the same time, the charging / extracting device (4) of the second idle roller row (45) is processed.
The length of the pipe is set by a pawl (55) that pushes the rear end of the pipe provided in 6) in the loading direction of the pipe end processing device (57) and a stopper (59) that restricts the movement limit of the pawl in the loading direction. It is characterized in that it is configured to be able to.

[Action]

In the pipe end adjusting apparatus of the present invention, the pipe is traversing means 1
And is fed laterally to the first idle roller row 11, the aligning conveyor 44, and the second idle roller row 45 in order.

In the first idle roller row 11, the pipes are vertically fed by the charging / extracting device 12, and the pipe ends are fixed by the fixed chuck device 27. In this state, the pipe end machining device 39 operates to perform cutting, end face machining, and inner and outer chamfering in order on one pipe end.

When a series of processing for one pipe end is completed, the pipe end is released from the fixed chuck device 27, the charging / extracting device 12 is re-activated, the pipe end is extracted from the fixed chuck device 27, and the traverse means 11 is used. The tubes are fed transversely to the aligning conveyor 44. In the aligning conveyor 44, coarse movement of the pipe in the pipe axis direction and waiting are performed.

Due to the re-operation of the traversing means 1, the pipe is moved to the second idle roller row.
When loaded into 45, the charging / extracting device 46 operates to feed the pipe again to the fixed chuck device 56 side in the longitudinal direction. At this time, lengthening of the pipe is performed with reference to the previously processed pipe end, and after the pipe end is fixed to the fixed chuck device 56, the pipe end processing device 57 operates and the other pipe end is Cutting, edge processing, chamfering inside and outside.

When the series of processing for the other pipe end is completed, the charging / extracting device 46 is restarted to extract the pipe end from the fixed chuck device 56, and the traverse means 1 carries the pipe out of the device.

As described above, the pipe end adjusting apparatus of the present invention performs four steps of cutting, end face machining, outer chamfering, and inner chamfering, with each pipe end fixed by the fixed chuck devices 27, 56, respectively.
In the idle roller row 45, the fixed chuck device 56 can be charged on the basis of one of the pipe ends that has been subjected to the refinement processing, so that even in a high precision pipe such as a nuclear fuel cladding pipe made of a zirconium alloy. , The end position of the pipe does not deviate from the length tolerance of the final product.

〔Example〕

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

1 and 2 are a plan view and a front view of the entire apparatus, respectively.

Reference numeral 1 is a traversing means for conveying the pipe in a direction orthogonal to the pipe axis, which is a walking beam. The traversing means 1 is provided with a fixed beam 6 and a movable beam 7 laid in a direction orthogonal to the tube axis as shown in FIGS. Fixed beam 6,
A drive rotation shaft 8 and a driven rotation shaft 9 are disposed below the movable beam 7. A chain 4 is stretched via a tension sprocket 5 between a drive sprocket 2 attached to the drive rotating shaft 8 and a driven sprocket 3 attached to the driven rotating shaft 9. The chain 4 causes the eccentric rollers 10, 10 provided on the drive rotating shaft 8 and the driven rotating shaft 9 to rotate synchronously, and imparts a turning motion to the movable beam 7 so that the movable beam 7 is placed on the fixed beam 6. The pipe is conveyed in the direction orthogonal to the pipe axis.

The tube is moved by the traverse means 1 into a first row of idle rollers 11
When it reaches, the charging / extracting device 12 provided in the idle roller row 11 drives it in the pipe axis direction and conveys it to the left end in FIG.

In the charging / extracting device provided in the first idle roller row 11, a slide base 13 supported by a guide rod 15 is connected to a chain 14 driven by a motor 25 as shown in FIGS. The motor 25 is driven to move in parallel to the first idle roller row 11. On the other hand, an elevating head 16 is attached to the slide base 13 so as to be vertically movable. That is, the elevating head 16 has a vertical guide cover 17 and a tension spring 19 wound around the guide cover 17, and an elevating cylinder mounted on a fixed frame base 21.
By the operation of 20, the elevating head 16 is hooked by the metal fitting 22 at the tip thereof and can be lifted against the tension spring 19. The elevating head 16 also has a chuck portion 18 provided at its lower part with a single-acting cylinder 23 for closing the chuck and a tension spring 24 for opening the chuck. Reference numeral 26 denotes an encoder for measuring the moving distance of the pipe.

Before the tubes are loaded into the first idle roller row 11, the elevating head 16 moves up with the chuck portion 18 open.
When the tube is loaded into the loading / extracting device 12 by the traversing means 1, the elevating head 16 is lowered to close the chuck portion 18 to grip the tube, and then the chain 14 is used to idle the roller as shown in FIG. The pipe is moved in the pipe axial direction to the fixed chuck device 27 provided at the left end of the row 11.

As shown in Fig. 10, the fixed chuck device 27 has a roller at the top.
On the other hand, it has an upper chuck 31 to which an upward force is constantly applied by a spring 33 and a fixed lower chuck 32, and a roller 29 is moved by a cam 29 by the operation of a cylinder 28 when a pipe is conveyed. Press to push down the upper chuck 31,
The tube ends are fixed by the upper and lower chucks 31 and 32.

When the pipe ends are fixed by the upper and lower chucks 31 and 32, one pipe end is processed by the pipe end processing device 39 provided subsequently by the fixed chuck device 27.

The pipe end processing device 39 is a common bed 34 that horizontally moves in a direction orthogonal to the pipe axis as shown in FIGS. 11, 12 and 14, 15.
And a cutting machine 35 that moves back and forth in the pipe axis direction, and an end surface processing machine
36, an outer chamfering machine 37, and an inner chamfering machine 38.
These devices are mounted on the bed 34 with their center heights being equal, and they are sequentially driven to perform cutting, end face machining, outer chamfering, and inner chamfering on one pipe end. 70 is a motor for driving the bed 34 in the direction perpendicular to the pipe axis on the pedestal 71, 40 and 42 are an external chamfering machine 37, a slide base 41 on which an internal chamfering machine 38 is mounted, a cutting machine 35, and an end surface processing machine 36. A cylinder and a motor for moving the mounted slide base 43 in the tube axis direction.

Note that the cutting machine 35, the end surface processing machine 36, the outer chamfering machine 37, and the inner chamfering machine 38 are mounted on independent slide bases, and each slide base is moved in the pipe axis direction by a cylinder or a motor. Good.

By driving the motor 70, the cutting machine 35 is positioned on the extension line of the first idle roller row 11, and the cutting machine 35 is driven by the motor 42.
The cutting is performed after advancing from the retracted position toward the pipe by driving. When the cutting is completed, the cutting machine 35 is retracted and the motor 70
The end surface processing machine 35 is positioned on the extension line of the first idle roller row 11 by driving. The end surface processing machine 36 located on the extension line of the first idle roller row 11 advances toward the pipe by the drive of the motor 42, performs the end surface processing, and then moves backward. Thereafter, similarly, the outer chamfering machine 37 and the inner chamfering machine 38 are driven. The operation of each device is described in detail in JP-A-62-208801.

When each processing at the time of cutting the one end side by the pipe end processing device 39 is completed, the gripping of the pipe by the fixed chuck 27 is released, and the pipe is gripped by the chuck portion 18 of the charging and extracting device 12 again and the above-mentioned is performed. Then, it is moved in the opposite direction to the state in which the charging / extracting device 12 was charged, and the state is restored. When the original state is restored, the chuck portion 18 opens and the lifting cylinder 20 lifts the lifting head 16 upward. The tube released from the restraint by the chuck portion 18 is laterally fed by the traverse means 1 and is transferred to the second idle roller row 45 via the aligning conveyor 44 which temporarily holds and coarsely moves in the axial direction of the tube.

Charge extraction device 46 provided in the third idle roller row 45
Is a chain 48 driven by a motor 47 as shown in FIG. 13, upper and lower rods 49, 50 connected to the chain 48, and guides 51 for these upper and lower rods 49, 50.
A claw 55 for pushing the pipe end attached to the lower rod 50, a stopper 59 for restricting the protruding limit of the lower rod 50 to the pipe end processing device 57 side, and a slide base similar to the charging / extracting device 12 52, a lifting head 53, and a lifting cylinder 54, respectively.

The tube carried into the second idle roller row 45 was provided at the end of the second idle roller row 45, with one of the tube ends subjected to the trimming process being pushed by the claw 55 of the charging and extracting device 46. The tube end is inserted into the fixed chuck device 56 on the right side of the drawing. Then, the stopper 59 provided on the lower rod 50 comes into contact with the guide 51 to stop the claw 55. Since the position of the stopper 59 is adjusted so that the dimension between the stop position of the claw 55 and the end surface processing end position of the pipe end processing device 57 becomes a predetermined product length,
The stop position of the pipe is determined on the basis of the one end face subjected to the trimming process. Further, the pressing head 73 shown in FIG. 2 prevents the moving tube from being pressed from above, and prevents the tube from moving by inertia and separating the tube end from the claw 55.

The pipe end is inserted into the fixed chuck device 56 similar to the fixed chuck device 27 by the claw 55, and when the pipe end is gripped by the fixed chuck device 56, the pipe end portion is provided on the fixed chuck device 56 side in this state. Cutting, end surface processing, outer chamfering, and inner chamfering are performed by the pipe end processing device 57 having the same configuration as the pipe end processing device 39. When each of these processes is completed, the grip of the pipe by the fixed chuck device 56 is released,
The tube is grasped by the chuck portion of the elevating head 53 and returned to the original state loaded in the loading / extracting device 46. After that, the pipe is released from the restraint by the chuck portion and is discharged to the outside of the pipe end adjusting apparatus of the present invention by the traverse means 1.

In the second idle roller row 45, when the pipe is moved to the fixed chuck device 56 as described above, the pipe end is pressed by the pawl 55, so that there is no slip between the pawl 55 and the pipe, and the finishing is completed. The length of the pipe is accurately measured based on the end of one of the pipes. Further, in the first and second idle roller rows 11 and 45, each processing such as cutting is performed while the tube ends are fixed by the fixed chuck devices 27 and 56. Therefore, even in a high-precision tube such as a nuclear fuel cladding tube made of a zirconium alloy, the tube end position does not deviate and the length tolerance of the final product is not deviated, and the tube end finish as a whole can be performed with high accuracy, stability, and efficiency. .

(Effects of the Invention) The pipe end adjusting device of the present invention performs four steps of cutting, end face machining, outer chamfering, and inner chamfering with the pipe end fixed, and the pipe end is treated with the finished pipe end as a reference. Since the length can be set, even in high precision pipes such as nuclear fuel cladding pipes made of zirconium alloy, the pipe end position does not deviate and the length tolerance of the final product is not deviated. In addition, it is performed stably, the economic effect associated with the prevention of defective products is great, and it has a great effect on improving the finishing accuracy and reducing the manufacturing cost. Also, the first and second
Since the tube ends can be simultaneously processed in parallel by the idle roller rows, the efficiency is remarkably excellent.

[Brief description of drawings]

The drawings show an embodiment of the present invention.
The figures are plan views and side views of the entire apparatus, FIGS. 3, 4, and 5 are left side views, plan views and right side views of the traversing means, and FIGS. 6, 7, and 8 are 1 is a plan view, a side view and a front view of the charging / extracting device provided in the idle roller row, FIG. 9 is a front view showing an opened state of the chuck portion, FIG. 10 is a side view of the fixed chuck device, 11 and 12 are a plan view and a side view of the pipe end processing device, FIG. 13 is a side view of the charging and extracting device provided in the second idle roller row, and FIG. 14 is a cutting machine and an end surface processing machine. FIG. 15 is an enlarged plan view of the outer chamfering machine and the inner chamfering machine of FIG. 1: Traversing means, 11: First idle roller row, 12, 46: Charge extraction device, 27, 56: Fixed chuck device, 35: Cutting machine, 36: End surface processing machine, 37, 38: Chamfering machine, 39: Pipe end processing device, 44: Aligning conveyor, 45: Second idle roller row.

Claims (1)

[Claims] 1. A traverse means (1) for traversing a pipe in a direction orthogonal to a pipe axis, and a traverse path of the pipe which is arranged in parallel from the upstream side to the downstream side of the aligning conveyor (44), respectively. A first idle roller row (11) and a second idle roller row (45) that support the pipe so as to be movable in the pipe axis direction.
And the first and second idle roller rows (11, 45) respectively, and the loading / extracting device (1
2,46), a fixed chuck device (27,56) that is provided on opposite tip ends of the first and second idle roller rows (11,45) to fix the pipe, and a fixed chuck device (27,56). ) Further on the tip side, and a cutting machine, an end surface processing machine, and a chamfering machine that move in the pipe axis direction on a common bed that moves horizontally in the direction orthogonal to the pipe axis, make their center heights equal Equipped with a pipe end processing device (39, 57) mounted in order in the moving direction,
Charge extraction device (12) on the first idle roller row (11)
The pipe is loaded into the pipe end processing device (39) on the one end side by means of the loading / extracting device (46) on the second idle roller row (45), and the pipe end processing device (57) on the other end side is loaded. ),
A claw (55) for processing the other end side of the pipe, and for pushing the pipe rear end of the charging / extracting device (46) of the second idle roller row (45) in the loading direction of the pipe end processing device (57). And a stopper (59) for restricting the movement limit of the claw in the loading direction, so that the length of the pipe can be extended.