JPH07116738A - Forming stand mechanism of resistance welded tube - Google Patents

Abstract

PURPOSE:To change a stand in a short time in the case where the diameter of a resistance welded tube is changed. CONSTITUTION:A bearing box for supporting a roll shaft fitted in a stand 1 on the drive side and a roll shaft 3 are constituted in the axial center direction in a freely fittable manner, and a roll 4 and the roll shaft 3 are supported in a horizontal condition by a stand on the operator side. A sub bed 7 is supported by a main bed 8, and the sub bed is constituted in a slidable manner in the direction of the roll shaft on the main bed, and a pushing/pulling mechanism to slide the sub bed on the main bed is provided, and a clamp mechanism to fix the sub bed to the main bed so as not to be floated is provided. A plurality of stands such as the stands on the operator side of the side roll stands in addition to the stands 2 on the operator side of the main roll stand are loaded on the sub bed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric resistance welded pipe formed by forming a strip-shaped steel plate into a tubular shape and welding the butt seams to change the diameter of the electric resistance welded pipe. Regarding stand replacement method.

[0002]

2. Description of the Related Art Conventionally, a technique relating to a mechanism for exchanging a forming stand for an electric resistance welded pipe has been publicly known. For example, it is like the technique described in Japanese Patent Laid-Open No. 5-212440. As a method of replacing the conventional ERW pipe forming stand,
There were the following two methods. The first is in the pipe making line,
This is a primitive method of removing the roll attached to the stand and replacing it with a new roll. However, in the case of this mechanism, the time during which the pipe making line is stopped for roll replacement becomes long, and the operating rate of the pipe making line decreases.

Another method is shown in FIGS.
The conventional technique as shown in FIG. 10 is a schematic view of a conventional stand mechanism, FIG. 11 is a schematic view of a state where the stand portion is removed and replaced by a crane, FIG. 12 is a side view of an actual conventional stand, and FIG.
3 is a drawing of a conventional drive shaft support device portion.

In the conventional stand exchanging mechanism shown in FIGS. 10 to 12, a detachable subbed 38 is placed on a main bed 39, and the subbed 3
The drive-side stand 1 and the operator-side stand 2 were fixed on top of 8. Therefore, in order to replace the roll, the drive side stand 1 and the operator side stand 2
It is necessary to remove all of the sub-bed 38 and the drive shaft 18
The drive shaft support device 40 is provided between the universal joints 34 and 36 for supporting the drive shafts and the universal joints 35 and 37 to support the drive shaft 18 and the drive shaft 19 so as not to hang down.
・ I had removed part 37. Bearing support bodies 32 and 33 that can support the drive shafts 18 and 19 when they are suspended are fixed to the drive shaft support device 40. As shown in FIG. By the bearing position adjusting handle 41 provided in the
The position of 3 can be moved up and down.

From the main bed 39 of the pipe making line, the stand of the main roll stand M and the assembly of rolls placed on the sub-bed 38 together are removed by an overhead crane, and a spare prepared separately offline. This is a method of replacing the main roll stand M'with a set of roll and stand assemblies. However, the drawback of this prior art is that the same set of rolls as in the pipe making line must be placed off-line, which increases the amount of investment. Also, after replacing the rolls that are offline, it is necessary to replace the rolls offline, pull out the rolls from the stand,
In order to replace the roll of another size, it is necessary to disassemble the stand again, so in the normal replacement,
The problem was that it took about one hour with just one stand. About 10 stands are required for one pipe making line, so if you are exchanging between all of these,
It takes about 10 hours, and when the lot size is getting smaller like recently, it is only necessary to change rolls offline.
A great deal of time is lost. As a result, the operating rate of the pipe making line is significantly reduced.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems of the prior art. That is, it is the same as the replacement method by sub-bed,
The number of parts to be replaced is halved compared to the conventional case, and the investment cost is reduced. In addition, the roll replacement work off-line has been reduced by 80% compared to the conventional method,
The roll of one stand can be replaced in about 15 minutes. Further, the drive shaft supporting device and the drive side stand are also used to reduce the number of parts.

[0007]

The problems to be solved by the present invention are as described above. Next, the means for solving the problems will be described. That is, according to claim 1, a roll shaft bearing bearing box 11 fitted in the drive side stand 1;
The roll shaft 3 and the roll shaft 3 are configured to be fittable in the axial center direction, and the roll shaft 4 and the roll shaft 3 are made horizontal by the operator side stand 2 in a state where the roll shaft supporting bearing box 11 and the roll shaft 3 are removed. It can be supported.

According to a second aspect of the present invention, the sleeve 13 is fitted in the inner diameter portion of the bearing bearing 15 inside the roller shaft bearing bearing box 11 arranged in the drive side stand 1, and the sleeve 13 is attached to the drive shaft 18. A universal joint 23 is connected, and further, a female side spline 13a is formed on the inner diameter side of the sleeve 13, and a male side spline 14 fitted to the female side spline 13a is an end of the roll shaft 3 on the drive side stand 1 side. It is engraved on the section.

In the third aspect, the sub-bed 7 and the main bed 8 support the main bed 8 in a fixed state.
The sub bed 7 is configured to be slidable on the main bed 8 in the roll axis direction.

According to a fourth aspect of the present invention, the push-pull drive mechanism for slidingly moving the sub-bed 7 on the main bed 8 is provided.

According to a fifth aspect of the present invention, a clamp mechanism for fixing the sub-bed 7 to the main bed 8 so as not to float up is provided.

According to the sixth aspect, in addition to the operator side stand 2 of the main roll stand M, a plurality of stands such as the operator side stand of the side roll stand S are mounted on the sub-bed 7.

[0013]

[Operation] Next, the operation will be described. That is, by removing the operator side stand 2, the roll shaft, and the roll integrally, the side of the drive side stand 1 can be left, and one end of the upper roll shaft 3 and the lower roll shaft 5 has already been released. Therefore, the time required for exchanging the upper roll 4 and the lower roll 6 can be shortened to about 5 minutes for one roll and about 10 to 15 minutes for one stand.
In addition, since the female side spline 13a and the spline portion 14 are fitted and removed, the moving force of the sub bed 7 by the sub bed engaging / disengaging cylinder 10 does not affect human hands.
Between the drive side stand 1 side and the drive shafts 18 and 19 can be easily removed.

A drive side stand 1 fixed to the main bed 8 side by sliding of the sub bed 7,
Operator side stand 2 fixed to the sub bed 7 side
The roll and the roll shaft can be separated, and the roll shaft can be easily detached and removed without the need for human intervention. Further, since the push-pull drive mechanism for slidingly moving the sub-bed 7 on the main bed 8 is provided, the sub-bed engaging / disengaging cylinder 10 constituting the push-pull mechanism separates the roll shaft from the drive-side stand 1 and the sub-bed. It is possible to simultaneously engage and disengage the main bed 8 from the fixed state with respect to 7.

Further, since the clamp mechanism for fixing the sub bed 7 to the main bed 8 so as not to float up is provided, the clamp body 9 of the sub bed 7 is also operated in conjunction with the operation of the sub bed engaging / disengaging cylinder 10. It is possible to insert and remove the roll shaft and operate the sub bed 7 and the main bed 8 only by operating the sub bed engaging / disengaging cylinder 10.
Can be disengaged. Also, sub bed 7
In addition to the operator side stand 2 of the main roll stand M, a plurality of stands such as the operator side stand of the side roll stand S are placed on the upper side of the main roll stand M. Since the roll shaft side can be attached and detached, the time required to operate the crane can be shortened.

[0016]

EXAMPLES Next, examples will be described. FIG. 1 is a schematic view of a forming stand mechanism of an electric resistance welded pipe according to the present invention, FIG. 2 is a schematic view in a state where an operator side stand 2 and a roll portion are removed, and FIG.
Is a schematic diagram of a state in which the operator side stand 2 and the roll portion are lifted by a crane and replaced, FIG. 4 is a schematic diagram showing a state in which the roll is detached from the roll shaft of the operator side stand 2 in an offline state, and FIG. 1 is a schematic plan view of the state of FIG. 6, FIG. 6 is a schematic plan view of the state of FIG. 2, FIG. 7 is a side cross-sectional view of an actual ERW pipe forming stand mechanism in the state of FIG. 1, and FIG. FIG. 9 is a side sectional view of an actual ERW forming stand mechanism, and FIG. 9 is an enlarged side sectional view of the roll shaft supporting bearing boxes 11 and 12 supporting the roll shaft 3.

In FIGS. 1, 5, and 7, the subbed 7
A description will be given of a stand state in which the electric resistance welded pipe can be formed in a mounted state in which is fixed to the main bed 8. The motor shaft of the drive motor 28 is the input shaft 2 of the distribution gearbox 21.
It is connected to 2. Inside the distribution gear box 21, the driving force of the upper roll 4 and the driving force of the lower roll 6 are branched. An upper shaft 42 and a lower shaft 43 are projected from the distribution gear box 21, and the drive shaft 18 is connected to the upper shaft 42 via a universal joint 24.
The upper roll shaft 3 is connected to the other end of the drive shaft 18 via a universal joint 23. The portion of the sleeve 13 that constitutes the universal joint 23 is supported by the drive-side stand 1, and the bearing box 1 for roll shaft support is provided.
The bearing is supported by the first bearing 15.

The sleeve 13, which is a part of the universal joint 23, has a female spline 13a therein and a guide funnel portion 13 as shown in detail in FIG.
b is configured. The guide funnel portion 13b guides the spline portion 14 at the end portion of the upper roll shaft 3 to mesh with the female side spline 13a. The other end of the upper roll shaft 3 is bearing-supported by a roll shaft bearing bearing box 12 of the operator side stand 2. Inside the roller shaft bearing housing 12, the shaft end of the upper roll shaft 3 has a shaft end fixing body 17
Is fitted and fixed to the bearing 16 in an attracted state.

The upper roll shaft 3 is supported in a cantilevered state on the operator side stand 2 by a roll shaft bearing bearing box 11, and the operator side stand 2 is pulled to remove the spline portion 14 of the upper roll shaft 3. Even when the portion is pulled out from the female side spline 13a, the weight of the upper roll 4 and the upper roll shaft 3 prevents the upper roll shaft 3 from hanging down. When pushing the operator side stand 2 together with the sub bed 7 and pulling out the part of the spline portion 14 from the female side spline 13a, the end portion of the upper roll shaft 3 on the operator side stand 2 side may be removed inside the bearing bearing 16. So that the shaft end fixing body 17 prevents the roll shaft bearing bearing box 1
2 and the bearing 16 are integrated.

The lower drive shaft 19 is connected to the lower shaft 43 protruding from the distribution gearbox 21 via a universal joint 25. A universal joint 26 is connected to the right end of the lower drive shaft 19,
The universal joint 26 also includes a sleeve 13, a female side spline 13a, and a guide funnel portion 13b. Further, the lower roll shaft 5 supporting the lower roll 6 is also provided with the spline portion 14, and the right end of the lower roll shaft 5 has a shaft end fixing body 17 similarly to the right end of the upper roll shaft 3. And a bearing box 12 for supporting the roll shaft.

The upper roll shaft 3 and the upper roll 4 can adjust the gap between the lower roll shaft 5 and the lower roll 6, and when the strip-shaped steel sheet is first passed or the pressing force of the roll is adjusted. Used in case. The gap adjusting mechanism includes a gap adjusting motor, a gap adjusting drive shaft 30, and a gap adjusting support shaft 31. The gap adjusting drive shaft 3
0 and the gap adjusting support shaft 31 also form a spline fitting portion. When the operator-side stand 2 is detached and slid to the right, the gap adjusting drive shaft 30 and the gap adjusting support shaft 31 are fitted. It is configured so that it can be separated from each other.

The gap adjusting drive shaft 30 and the gap adjusting support shaft 3
The rotation of 1 is converted into the vertical force of the bearing boxes 11 and 12 for supporting the roll shaft via the bevel gear box provided on the upper part of the drive side stand 1 and the operator side stand 2, and the upper roll shaft 3 and the upper roll are rotated. The position of 4 can be adjusted up and down. The gap adjusting drive shaft 30 and the gap adjusting support shaft 31 are also made detachable so that the operator side stand 2 can be easily attached and detached except the drive side stand 1. I was able to do it.

Next, the construction of the sub-bed engaging / disengaging cylinder 10 and the clamp body 9 will be described with reference to FIGS. 2, 3, 5, and 6. A sub bed engagement / disengagement cylinder 10 having a fixed cylinder side is provided on the main bed 8 side, and a clamp body 9 is fixed to the piston side of the sub bed engagement / disengagement cylinder 10. The clamp body 9 has an engaging wedge portion 9a and an engaging protrusion portion 9b.
Is configured. When the sub-bed engagement / disengagement cylinder 10 extends, the engagement protrusion 9b pushes the left end of the sub-bed 7 and pushes the right side. When the sub-bed engaging / disengaging cylinder 10 is contracted, the engaging wedge portion 9a of the clamp body 9 is engaged, and the sub-bed 7 is pushed toward the engaging protrusions 8a and 8a of the main bed 8,
With the sub-bed 7 pressed against the engaging projections 8a, 8a, the engaging wedge 9a rides on the engaging wedge 7a and is fastened in the engaged state. Therefore, the engaging wedge portion 9a is configured to engage with the engaging wedge portion 7a of the sub bed 7 to prevent the sub bed 7 from rising. When the clamp body 9 including the engaging wedge portion 9a and the engaging protrusion portion 9b is slid to the right in FIG. 2 by the sub-bed engaging / disengaging cylinder 10, the engaging wedge portion 9a and the engaging wedge portion 7a are engaged with each other. When the mated state is released, the engaging projection 9b further pushes the sub bed 7 to slide the entire sub bed 7 to the right on the main bed 8.

When the sub bed engaging / disengaging cylinder 10 is extended, the engaging projection 9b pushes the sub bed 7 and the operator side stand 2 moves, whereby the upper roll shaft 3
And the upper roll 4 comes out from the female side spline 13a on the drive side stand 1 side. Similarly, the lower roll shaft 5 and the lower roll 6 are pulled out from the female side spline 13a toward the drive side stand 1. The condition is illustrated in FIGS. 2 and 6. From this state, a wire 51 is hung on the hook 50 of the sub-bed 7 and lifted by the crane. As shown in FIG. 5, not only the main roll stand M but also the side roll stand S1 and the side roll stand S2 can be simultaneously placed on the stand, and a plurality of stands can be detached integrally. You can do it.

Lower roll shaft 5 moved by the crane
For the operator side stand 2 and the roll, first, the fixing nuts 52, 52 screwed onto the upper roll shaft 3 and the lower roll shaft 5 are removed. By simply removing the fixing nut 52, the upper roll 4 and the lower roll 6 can be removed from the upper roll shaft 3 and the lower roll shaft 5. The removal and attachment of the roll is done with a crane,
Since the part of the drive side stand 1 has already been removed,
It can be done with a simple work of about 10 to 15 minutes per stand.

[0026]

Since the present invention is constructed as described above, it has the following effects. That is, as in claim 1,
The roll shaft bearing bearing box 11 fitted in the drive side stand 1 and the roll shaft 3 are configured to be freely fit in the axial center direction, and the roll 4 and the roll shaft 3 are kept horizontal by the operator side stand 2. Since the operator side stand 2, the roll shaft and the roll can be integrally removed, the side of the drive side stand 1 can be left.
Since one end of the upper roll shaft 3 and the lower roll shaft 5 has already been released, the time required for replacing the upper roll 4 and the lower roll 6 is about 5 minutes for one roll and about 10 to 15 minutes for one stand. It can be done in a short time.

A sleeve 13 is fitted in the inner diameter portion of the bearing bearing 15 inside the roller shaft supporting bearing box 11 arranged in the drive side stand 1 as in claim 2, and the sleeve 13 is attached to the drive shaft 18. A universal joint 23 is connected, and further, a female side spline 13a is formed on the inner diameter side of the sleeve 13, and a male side spline 14 fitted to the female side spline 13a is an end of the roll shaft 3 on the drive side stand 1 side. Since it is engraved on the part, it is a fitting / disengagement between the female side spline 13a and the spline part 14. Therefore, the moving force of the sub bed 7 by the sub bed engagement / disengagement cylinder 10 can easily drive the human body without being affected. It is possible to remove between the side of the side stand 1 and the drive shafts 18 and 19.

Since the sub-bed 7 and the main bed 8 support the main bed 8 and the sub-bed 7 is slidable in the roll axis direction on the main bed 8 in a fixed state, By sliding the sub-bed 7, the drive-side stand 1 fixed to the main bed 8 side, the operator-side stand 2 fixed to the sub-bed 7 side, the roll and the roll shaft can be separated,
Easily release the roll shaft without the need for human intervention,
I was able to remove it.

Since the push-pull drive mechanism for slidingly moving the sub-bed 7 on the main bed 8 is provided, the sub-bed engagement / disengagement cylinder 10 constituting the push-pull mechanism allows the roll shaft and the drive side to move. Thus, the stand 1 could be separated and the main bed 8 could be engaged and disengaged from the sub-bed 7 at the same time.

Since the clamp mechanism for fixing the sub-bed 7 to the main bed 8 so as not to float is provided as in claim 5, the clamp body 9 of the sub-bed 7 is also interlocked with the operation of the sub-bed engaging / disengaging cylinder 10. It is possible to work by doing so, and only by operating the sub-bed engaging / disengaging cylinder 10, the roll shaft can be fitted / disengaged and the sub-bed 7 and the main bed 8 can be disengaged.

As in claim 6, on the sub-bed 7,
In addition to the operator side stand 2 of the main roll stand M, a plurality of stands such as the operator side stand of the side roll stand S are placed, so that one sub bed 7
By detaching, the roll shafts of a plurality of stands can be detached at the same time, and therefore the time required to operate the crane can be shortened.

[Brief description of drawings]

FIG. 1 is a schematic view of a forming stand mechanism for an electric resistance welded pipe of the present invention.

FIG. 2 is a schematic view of a state where an operator side stand 2 and a roll portion are removed.

FIG. 3 is a schematic view of a state where the operator side stand 2 and rolls are lifted by a crane and replaced.

FIG. 4 is an operator's stand 2 offline.
FIG. 6 is a schematic view showing a state in which the roll is detached from the roll shaft of FIG.

5 is a schematic plan view of the state of FIG. 1. FIG.

FIG. 6 is a schematic plan view of the state of FIG.

FIG. 7 is a side sectional view of an actual electric resistance welded pipe forming stand mechanism in the state of FIG. 1;

FIG. 8 is a side sectional view of an actual electric resistance welded pipe forming stand mechanism in the state of FIG. 2;

FIG. 9: Roll shaft bearing bearing box 1 supporting the roll shaft 3
1 and 12 are enlarged side sectional views.

FIG. 10 is a schematic view of a conventional stand mechanism.

FIG. 11 is a schematic diagram showing a state in which the stand portion is removed and replaced by a crane.

FIG. 12 is a side view of an actual conventional stand.

FIG. 13 is a view of a conventional drive shaft support device portion.

[Explanation of symbols]

 M Main roll stand S1, S2 Side roll stand 1 Drive side stand 2 Operator side stand 3 Upper roll shaft 4 Upper roll 5 Lower roll shaft 6 Lower roll 7 Subbed 8 Mainbed 9 Clamping body 10 Subbed engaging / disengaging cylinder 11, 12 Roll shaft Bearing bearing box 13 Sleeve 13a Female side spline 13b Guide funnel part 14 Spline part 15,16 Bearing bearing 17 Shaft end fixed body

Claims (6)

[Claims] 1. A roll shaft bearing bearing box 11 fitted in a drive side stand 1 and a roll shaft 3 are configured to be freely fitted in the axial center direction, and the roll shaft bearing bearing box 11 and the roll shaft are arranged. In the state where 3 and 3 are removed, the roll 4 and the roll shaft 3 are
A forming stand mechanism for an electric resistance welded pipe, which can be supported horizontally by an operator side stand 2. 2. A forming stand mechanism for an electric resistance welded pipe according to claim 1, wherein a sleeve 13 is fitted to an inner diameter portion of a bearing bearing 15 inside the roll shaft supporting bearing box 11 arranged in the drive side stand 1. The universal joint 23 of the drive shaft 18 is coupled to the sleeve 13, and the female side spline 13a is engraved on the inner diameter side of the sleeve 13, and the male side spline 14 fitted to the female side spline 13a is formed. A forming stand mechanism for an electric resistance welded pipe, which is engraved at an end of the roll shaft 3 on the drive side stand 1 side. 3. A forming stand mechanism for an electric resistance welded pipe according to claim 1, which is supported by a sub-bed 7 and a main bed 8, and the main bed 8 is fixed, the sub-bed 7 is on the main bed 8, and a roll shaft is provided. A forming stand mechanism for electric resistance welded pipes, which is configured to be slidable in any direction. 4. The forming stand mechanism for an electric resistance welded pipe according to claim 3, further comprising a push-pull drive mechanism for slidingly moving the sub-bed 7 on the main bed 8. mechanism. 5. The electric resistance welded pipe forming stand according to claim 3, further comprising a clamp mechanism for fixing the sub bed 7 to the main bed 8 so that the sub bed 7 does not float up. mechanism. 6. On the sub-bed 7 according to claim 3,
In addition to the operator side stand 2 of the main roll stand M, a plurality of stands such as an operator side stand of the side roll stand S are mounted, and a forming stand mechanism for an electric resistance welded pipe.