JP2004009102A - Device for changing electric resistance welded tube forming roll - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently perform roll changing with simple structure when changing the rolls of a four-roll forming stand on an electric resistance welded tube manufacturing line. <P>SOLUTION: The reduction mechanisms of the upper roll 10 of the four-roll forming stand on the electric resistance welded tube manufacturing line are made freely attachably and detachably in the intermediate part, the support part of a horizontal jack for supporting side rolls 30 are mounted to yokes which are movable in the upper side and a pulling device 15 for drawing out the assembly of four upper, lower, right and left rolls aside at a time after pulling up these yokes. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a device for exchanging an electric resistance welded steel tube forming roll. More specifically, the present invention relates to an apparatus for forming a raw pipe, replacing a fin pass roll, a sizer roll, and the like in a process of manufacturing an electric resistance welded steel pipe.
[0002]
[Prior art]
Conventionally, in order to replace the forming rolls of the ERW steel pipe production line, the rolling device of each roll is disassembled from the outside, and each roll is taken out. Such an exchange operation requires a lot of manpower and a long operation time, and is inefficient. For this reason, there is a technique for improving the structure of the roll stand so that the roll assembly can be integrally pulled out. For example, there is a technique in which a roll stand is composed of an inner stand and an outer stand, and the inner stand is pulled out to the side or upward. In such a case, the structure of the roll stand becomes complicated and expensive, and a heavy-load crane is required for extracting the roll stand upward. Further, in such a technique, there is a problem that the re-arrangement work outside the line requires a long time, and as a result, it does not contribute to the improvement of the work efficiency.
[0003]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide an electric-resistance-welded steel tube forming roll changing device capable of efficiently performing the roll changing with a simple structure.
[0004]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a four-roll forming stand for an electric resistance welded steel pipe production line in which a lowering device for an upper roll can be detachably attached at an intermediate portion to support a side jack for supporting a side roll. The part is attached to a yoke that can be moved upward, and after moving the yoke to the roll changing position, a bogie is provided that simultaneously pulls out the four roll assemblies vertically and horizontally while supporting the lower roll. This is a device for replacing an ERW steel pipe forming roll.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. As an example, an embodiment in which the present invention is applied to a fin pass stand will be described. 1 is a front view showing the embodiment, FIG. 2 is a side view thereof, FIG. 3 is a view taken along the line AA in FIG. 1, and FIG. 4 is an explanatory view showing a state of being extracted to the side.
[0006]
The fin pass roll stand 1 includes an upper roll 10, a lower roll 20, and two side rolls 30 for a total of four rolls.
[0007]
The exchange device for an electric resistance welded steel tube forming roll according to the present invention is formed so that the pressing-down device 11 of the upper roll 10 of the fin pass roll stand 1 can be separated at the intermediate portion 12.
[0008]
As shown in FIG. 3, a tip metal fitting 32 of a lateral jack 31 supporting the side roll 30 is attached to a yoke 33, and the yoke 33 is movable upward. The yoke 33 allows the frame 2 of the roll stand to support the reaction force of the jack by the claw 34. The yoke 33 is pulled up by a pulling rod 36 (see FIG. 1) hanging down from a side roll yoke elevating jack 35 mounted on the top frame 13. The lifting rod 36 is connected to the yoke 33 via a connecting portion 37. The yoke 33 is formed so that the tip fitting 32 and the claw 34 of the horizontal jack 31 can slide in the vertical direction. When the yoke 33 is moved upward by the side roll yoke elevating jack 35, the restraint of the side roll 30 by the yoke is released, and the side roll 30 can be moved to the side. As shown in FIG. 4, the yoke 33 on the roll withdrawal side has a large stroke for lifting and retracting the yoke 33 upward from the upper roll, and a guide rod 39 for guiding the yoke 33 upward. The yoke 33 is attached to an ear 38. The yoke 33 on the side opposite to the roll drawing side is pulled up to a height that does not hinder the drawing of the side roll 30.
[0009]
FIG. 4 shows that after the yoke 33 is pulled up by the side roll yoke elevating jack 35, the elevating jacks (not shown) of the upper roll axle box and the left and right roll axle boxes are operated, the lower roll is placed on the axle box, and the bogie 60 is moved. The roll assembly 3 is composed of an upper roll 10, a lower roll 20, and two side rolls 30, and the roll assembly 3 is formed by a drawer 15 in the frame 2 of the roll stand. 3 shows a state where it is extracted to the state shown by the solid line on the left side of the figure.
[0010]
According to one example, conventionally, it took 70 minutes to disassemble the roll stand, but in the present embodiment, it was reduced to 10 minutes. As shown in FIG. 4, it is easy to replace the roll in this state with the roll assembly 3 pulled out from the roll stand 1 to the side. When assembling the roll assembly 3 into the roll stand 1, a reverse process to the above removal process may be performed.
[0011]
【The invention's effect】
Since the ERW steel tube forming roll changing device of the present invention is configured as described above, it is possible to easily and efficiently perform the roll changing with a simple structure.
[Brief description of the drawings]
FIG. 1 is a front view of a fin pass roll stand.
FIG. 2 is a side view of a fin pass roll stand.
FIG. 3 is a plan view of the side roll support section (a view taken along the line AA in FIG. 1).
FIG. 4 is an explanatory view showing a state where a roll assembly is extracted.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fin pass roll stand 2 Frame 3 Assembly 4 Arrow 10 Upper roll 11 Press-down device 12 Intermediate part 13 Top frame 14 Rail 15 Pull-out device 20 Lower roll 30 Side roll 31 Horizontal jack 32 Tip fitting 33 Yoke 34 Claw 35 Side roll yoke lifting jack 36 lifting rod 37 connecting part 38 ear 39 guide rod 60 cart

Claims (1)

The lowering device of the upper roll of the 4-roll forming stand of the ERW pipe manufacturing line is made detachable at the middle part, the support of the horizontal jack supporting the side roll is attached to the upwardly movable yoke, and the yoke is replaced at the roll exchange position. A roll exchanging device for forming an electric resistance welded steel pipe, comprising: a bogie for extracting an assembly of four rolls of upper, lower, left and right sides at a time while supporting the lower roll after moving to a position.

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