JPH0248110A - Tube end fine finishing processor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tube end finishing device suitable for tube end treatment of tubes such as Zircaloy clad tubes that require extremely strict finishing accuracy.

[Conventional technology]

Needless to say, finishing the end of a Zircaloy clad tube requires sufficient machining accuracy to satisfy the tube manufacturing specifications. However, on the other hand, no matter how precise the individual processing method is, it is inappropriate if there is a risk of damaging the pipe during processing. In other words, final product accuracy and efficiency throughout the entire process are considered more important than pursuing accuracy and efficiency in each individual process.

From this point of view, there is a method disclosed in Japanese Patent Application Laid-Open No. 62208801, which has completed a highly accurate, highly efficient, and stable pipe end finishing method through a clever combination of multiple processes. , the specific equipment layout is described in the same publication No. 1. That is, a clamper that clamps the tube moves in a forward conveyance direction perpendicular to the tube axis, and a cutting machine, an end face processing machine, an external chamfering machine, and an internal chamfering machine are arranged along the moving path.

[Problems to be Solved by the Invention] However, when a small-diameter long tube is fed horizontally using this device, the tube end position shifts, and the length tolerance of the final product (this tolerance is, for example, 4 m for Zircaloy-clad tubes) In some cases, it may not be possible to satisfy the extremely strict requirement of ±0.3 mm. Furthermore, in order to completely prevent displacement in the tube axis direction, a clamper and a moving device for the clamper must be of high precision, which causes problems such as an increase in device cost.

SUMMARY OF THE INVENTION In order to solve this problem, it is an object of the present invention to provide a tube end finishing device that can cut and chamfer the tube end while the tube is clamped.

[Means to solve the problem]

In order to achieve the above object, the tube end finishing device of the present invention includes a traversing means 1 for traversing the tube in a direction perpendicular to the tube axis, and A first idle roller row 11, an aligning conveyor 44, a second idle roller row 45, and a first idle roller row 11, an aligning conveyor 44, and a second idle roller row 45 are arranged in parallel from the upstream side to the downstream side in the traverse path. Second idle roller row 1
A charging/extracting device 12.46 is provided in each of the first and second tubes, and feeds the tube in the axial direction of the tube. Fixed chuck devices 27.56 provided at opposite ends of the second idle roller rows 11, 45, and a common bed provided following both fixed chuck devices 27.56 and horizontally movable in a direction perpendicular to the tube axis. A tube end processing device 39.57 is provided on top of the bed, in which a cutting machine, an end face processing machine, and a chamfering machine that move in the direction of the pipe axis are mounted in order in the bed movement direction with their center heights being equal.

[Function] In the pipe end finishing device of the present invention, the pipe is moved by the traverse means 1.
The rollers are laterally fed and sent to the first idle roller row 11, the aligning conveyor 44, and the second idle roller row 45 in this order.

In the first idle roller row 11, the tube is fed vertically by a charging and extracting device 12, and the tube end is fixed to a fixed chunk device 2.
Fixed by 7. In this state, the tube end processing device 39 operates to sequentially perform cutting, end surface processing, and internal and external chamfering on one tube end.

When the series of processing for one tube end is completed, the tube end is released from the fixed chuck device 27, and the charging/extracting device 12 is reactivated to extract the tube end from the fixed chuck device 27.
The tube is traversed by the traversing means 11 to the aligning conveyor 44. In the aligning conveyor 44, rough movement of the tube in the tube axis direction and waiting are performed.

When the tube is carried into the second idle roller row 45 by reactivation of the traversing means 1, the charging/extracting device 46 is activated and again vertically feeds the tube to the fixed chuck device 56. At this time, the length of the tube is determined based on the previously processed tube end,
After the tube end is fixed to the fixed chuck device 56, the tube end processing device 57 is operated to perform cutting, end surface processing, and internal and external chamfering on the other tube end.

When the series of processing for the other tube end is completed, the charging/extracting device 46 is operated again to extract the tube end from the fixed chuck device 56, and the tube is carried out of the device by the traversing means 1.

In this way, the tube end finishing device of the present invention performs the four steps of cutting, end face processing, outer chamfering, and inner chamfering with each tube end fixed by the fixed chuck device 27. Since charging into the fixed chuck 56 can be carried out based on one end of the tube that has undergone precision processing in the roller row 45, the position of the end of the tube can be misaligned even in high-precision tubes such as Zircaloy-coated tubes. The final product will not fall outside of the length tolerance.

[Example] Hereinafter, an example of the present invention will be specifically described based on the drawings.

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

Reference numeral 1 denotes a traversing means for conveying the tube in a direction perpendicular to the tube axis, which is a walking beam. As shown in FIGS. 3 to 5, this traversing means 1 includes a fixed beam 6 and a movable beam 7, which are laid in a direction perpendicular to the tube axis. Fixed bee J, 6
, below the movable beam 7 is a driving rotation shaft 8 and a driven rotation shaft 9.
is installed. A chain 4 is stretched between a driving sprocket 2 attached to a driving rotating shaft 8 and a driven sprocket 3 attached to a driven rotating shaft 9 via a tension sprocket 5. Eccentric rollers 10, 10 provided on the driving rotation shaft 8 and the driven rotation shaft 9, respectively, are rotated in synchronism by the chain 4, and by giving a turning motion to the movable beam 7, the movable beam 7 is placed on the fixed beam 6. The pipe is conveyed in a direction perpendicular to the pipe axis.

The tube is moved by the traversing means 1 to the first aitro roller row 11
When the tube reaches this point, it is driven in the tube axis direction by the charging/extracting device 12 provided on the idle roller row 11, and is conveyed to the left end in FIG.

As shown in FIGS. 6 to 9, the charging/extracting device provided in the first idle roller row 11 has a slite hese 13 supported by a guide rod 15 coupled to a chain 14 driven by a motor 25. It has a structure in which it moves parallel to the first idle roller row 11 by driving the motor 25. On the other hand, an elevating head 16 is attached to the slide/seat 13 so as to be movable up and down. That is, the elevating bed 16 has a vertical guide bar 17 and the guide bar 17.
It has a tension spring 19 connected to the fixed frame 21.
When the lifting cylinder 20 installed on
It is now possible to rise against 9. The lifting head 16 also has a single-acting cylinder 2 for opening the chunk at its lower part.
3 and a chuck portion 18 equipped with a tension spring 24 for opening the chunk. Note that 26 indicates an encoder for measuring the moving distance of the tube.

Before the tube is inserted into the first idle roller row 11, the elevating head 16 is elevated with the chuck portion 18 open. The tube is moved by the traversing means 1 to the charging and extracting device t.
12, the elevating bed 16 is lowered, and after closing the chunk part 18 and gripping the tube, the chain 14
The tube is moved in the tube axis direction to a fixed chuck device 27 provided at the left end of the first idle roller row 11.

As shown in FIG. 10, the fixed chunk device 27 is equipped with a roller 30 at the top, and has an upper chuck 31 to which an upward force is constantly applied by a spring 33, and a fixed lower chuck 32, so that the tube can be conveyed. When the cylinder 28 is operated, the cam 29 presses the roller 30 to push down the upper chuck 31, and the upper and lower chucks 31 and 32 fix the tube ends.

When the tube ends are fixed with the upper and lower chucks 31 and 32, a tube end processing device 3 is provided following the fixing chuck device 27.
At 9, one tube end is processed.

The tube end processing device 39 is shown in FIGS. 11, 12 and 14.15.
What is not shown in the figure (a common head 34 that moves horizontally in a direction perpendicular to the tube axis, and a cutting machine 3 that moves forward and backward in the tube axis direction on top of the common head 34)
5, an end face processing machine 36, an external chamfering machine 37, and an internal chamfering machine 38 are provided.

These devices have their center heights equal to 71-34.
These are mounted on the top and are driven in sequence to perform cutting, end face processing, external chamfering, and internal chamfering on one tube end. 70 is a motor that drives the head 34 in a direction perpendicular to the tube axis on a pedestal 71; 40 and 42 are mounted with a sleight head 41 on which an external chamfering machine 37 and an internal chamfering machine 38 are mounted; a cutting machine 35; and an end face processing machine 36. These are a cylinder and a motor that move the slide head 43 in the tube axis direction.

In addition, a cutting machine 35, an end face processing machine 36, an external chamfering machine 37
The inner surface chamfering machines 38 may be placed on independent sleight hesses, and the respective slight hesses may be prevented from moving in the tube axis direction by a cylinder or a motor.

The first eye roller row 11 is driven by the motor 70.
The cutting machine 35 is located on the extension line of the cutting machine 35.
is advanced toward the pipe from the retracted position by the drive of the motor 42, and then cutting is performed. When cutting is completed, the cutting machine 35 is moved backward, and the end face processing machine 36 is positioned on the extension line of the first idle roller row 11 by driving the motor 70. The end face processing machine 36 located on the extension line of the first eye roller row 11 moves forward toward the tube by the drive of the motor 42, performs end face processing, and then retreats. Thereafter, the outer chamfering machine 37 and the inner chamfering machine 38 are driven in the same manner.

The operation of each device is explained in detail in Japanese Patent Laid-Open No. 62-208801.

When the pipe end processing device 39 completes each process such as cutting on one end, the fixed chuck 27 releases the pipe, and the chuck part 18 of the charging/extracting device 12 grips the pipe again, as described above. It is moved in the opposite direction to return to the state it was in when it was charged into the charging/extracting device 12.

When the original state is restored, the chuck portion 18 is opened and the elevating bed 16 is raised upward by the elevating cylinder 20. Cha.

The tube released from the restraint by the ridge portion 18 moves to the traversing means 1.
The tube is then transported laterally to a second idle roller row 45 via an aligning conveyor 44 that controls the - time standby and coarse movement in the tube axis direction.

As shown in FIG. 13, the charging/extracting device 46 provided in the second idle roller row 45 includes a chain 48 driven by a motor 47, and upper and lower ronds 49 connected to the chain 48. 50, the guide 51 of these upper and lower ronds 49 and 50, the claw 55 for pushing the tube end attached to the lower rond 50, and the lower rod 50 that restricts the protrusion limit toward the tube end processing device 57 side. It has a stopper 59, a slide head 52 similar to the charging/extracting device 12, an elevating bed 53, and an elevating cylinder 54, respectively.

The pipe carried into the second idle roller row 45 has one end of the pipe that has been subjected to fine processing placed in the claw 55 of the charging/extracting device 46.
, and the tube end is inserted into the fixed chuck device 56 provided at the end of the second idle roller row 45 on the right side of the figure. Then, a stopper 59 provided on the lower rod 50 comes into contact with the guide 51, and the claw 55 stops. The position of the stopper 59 is adjusted so that the dimension between the stop position of the claw 55 and the end face machining end position of the tube end machining device 57 becomes a predetermined product length. The stopping position of the pipe is determined based on the end face of the pipe.

Further, the moving tube is pressed down from above by the pressing bed 73 shown in FIG. 2, and the tube end is prevented from moving due to inertia and separating from the claw 55.

The claw 55 allows the tube end to be fixed to the fixed chunk device 27.
When the tube end is inserted into the fixed chuck device 56 similar to the above, and the tube end is gripped by the fixed chuck device 56, in this state, the tube having the same structure as the tube end processing device 39 provided on the side of the fixed chuck device 56 is The end processing device 57 performs cutting, end face processing, external chamfering, and internal chamfering. When these processes are completed, the grip of the tube by the fixed chuck device 56 is released, and the tube is gripped by the chunk portion of the elevating hend 53 and returned to the original state where it was loaded into the charging/extracting device 46. Thereafter, the tube is released from the restriction imposed by the chunk part number and is discharged by the traversing means 1 to the outside of the tube end finishing apparatus of the present invention.

In the second idle roller row 45, when moving the tube to the fixed chuck device 56 as described above, the tube end is pressed by the claw 55, so there is no slip between the claw 55 and the tube, and the finishing is finished. The length of the tube is accurately determined based on the one end of the tube that has been completed. Also number 1. In the second idle roller row 11.45, various processes such as cutting are performed with the tube ends fixed by fixed chuck devices 27.56. Therefore, even in high-precision tubes such as Zircaloy-clad tubes, the tube end position will not deviate and the length tolerance of the final product will not be exceeded, and as a whole the tube end can be finished with high precision, stably, and efficiently.

(Effects of the Invention) The pipe end finishing device of the present invention performs the four steps of cutting, end face processing, external chamfering, and internal chamfering while the pipe end is fixed, and also performs the pipe finishing process based on the finished pipe end. Because the length can be measured, even for high-precision pipes such as Zircaloy-clad pipes, the end position of the end product will not shift and the length tolerance of the final product will not be exceeded, making it possible to finish the ends of the end product with high precision and stability. It also has a great economic effect due to the prevention of defective products, and has a great effect on improving finishing accuracy and reducing manufacturing costs. Also, 1st. Since the tube end treatment can be performed simultaneously in parallel with the second idle roller row, efficiency is also significantly improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIGS.
The figures are a plan view and a side view of the entire device, Figures 3, 4 and 5 are left side views, a top view and a right side view of the traversing means, and Figures 6, 7 and 8 are views of the traversing means. 9 is a front view showing the open state of the chuck section, FIG. 10 is a side view of the fixed chuck device, and FIG. Figures 11 and 12 are a plan view and a side view of the pipe end processing device, Figure 13 is a side view of the charging/extracting device installed in the second idle roller row, and Figure 14 is the cutting machine and end face processing machine. No. 15E is an enlarged plan view of the external chamfering machine and the internal chamfering machine. 1: traverse means, 11: first idle roller row, 12.
46: Charging extraction device, 27, 56: Fixed chunk device,
35: Cutting machine, 36: End face processing machine, 37. 38 Chamfering machine, 39: Pipe end processing device, 44z aligning conveyor, 45: Second idle roller row.

Claims (1)

[Claims] 1. Traversing means (1
), a first idle roller row (11), an aligning conveyor (44), and a second idle roller row (45) arranged in parallel from the upstream side to the downstream side in the traverse path of the pipe,
A charging/extracting device (12) provided in each of the first and second idle roller rows (11, 45) and feeding the tube in the tube axis direction.
, 46) and the first and second idle roller rows (11, 4
5) fixed chuck device (27,
56), and a cutting machine, end face processing machine, and chamfering machine that move in the direction of the tube axis on a common bed that is installed following both fixed chuck devices (27, 56) and moves horizontally in a direction perpendicular to the tube axis. and pipe end processing devices (39, 57) mounted in order in the bed movement direction with their center heights being equal.