JP2863612B2 - Roll stand replacement method and mechanism for ERW pipe roll forming machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Industrial application field The present invention relates to a continuous steel pipe manufacturing plant for continuously manufacturing steel pipes, and a roll for changing a steel pipe diameter of an ERW pipe roll forming machine as a core. The present invention relates to a stand replacement method and a replacement mechanism.

(B) Conventional technology Conventionally, a turret mill system as described in U.S. Pat.
The technique of arranging forming rolls for forming rolls of two different diameters is known.

However, in this method, a mill having a steel pipe diameter of 4 inches or more has an excessively large stand structure, which makes practical design and production difficult.

In addition, when only one set of roll stands is installed on the ERW pipe forming line, and when changing the pipe size,
It is also known to replace the rolls of each stand one by one using an overhead crane or the like, but in this case, the roll replacement work takes too much time,
The disadvantage is that the time loss of stopping the plant is large.

It is also known to mount a plurality of roll stands for forming an electric resistance welded pipe on one bed, prepare two sets of each of the roll stands, and replace the bed with an overhead crane or the like. There is, however, that the time required for the roll change operation is the same as that of the conventional method, and the production loss is large.

In addition, a plurality of roll stands for ERW pipe forming are placed on the child bogie, and the child bogies are further placed on the parent bogie, and the roll stand can be switched off-line from above the ERW pipe forming line to the parent bogie. It is known that the roll stand is replaced at the off-line position by exchanging the roll stand at the off-line position, but also in this case, the equipment scale becomes large and the capital investment amount becomes too large. There was something wrong.

(C) Problems to be Solved by the Invention The present invention provides a method and an exchange mechanism for replacing a roll stand of an electric resistance welded tube roll forming machine which eliminates the disadvantages of the prior art.

(D) Means for Solving the Problems The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

Two sets of the roll stand carts arranged at the same position are arranged on the traveling rail, and one set of the roll stand carts is placed on the ERW pipe forming line L and the other roll stand carts are taken offline during the forming operation. In the case of changing the diameter of the ERW pipe, two sets of roll stand carts can be switched on a parallel rail and a right-angle rail to run when changing the diameter of the ERW pipe. It is.

Further, in the running rail on which the roll stand cart runs, a right-angle rail 27 laid in a direction perpendicular to the ERW pipe forming line L, and a parallel rail 30 laid in a direction parallel to the ERW pipe forming line. And both have an intersection,
The rail at the intersection is divided into a length sufficient to mount the traveling wheels of the roll stand cart, and the intersection rail can be driven to turn between a right-angle rail and a parallel rail by a turning drive mechanism. It is.

In addition, an electric motor powered by a battery power source is mounted on a roll stand truck equipped with a plurality of roll stands for forming an electric resistance welded pipe, and a drive gear reducer for driving each roll. A driving wheel to be driven is installed, and the driving wheel is capable of turning around a vertical axis of the wheel, and further includes a locking and unlocking mechanism as required. Things.

In addition, the roll drive motor 1 and the primary reduction gear 2 are arranged on the fixed side stand 40,
The secondary reduction gear 4 is disposed, and the automatic shaft coupling 3 is interposed between the primary reduction gear 2 and the secondary reduction gear 4.

(E) Embodiment The problems to be solved and means to be solved by the present invention are as described above. Next, the configuration of the embodiment shown in the attached drawings will be described.

FIG. 1 is an overall plan view showing a roll stand exchange mechanism of an electric resistance welded tube roll forming machine, FIG. 2 is an enlarged plan view showing a part of a roll stand cart, FIG. 3 is a side view thereof, and FIG. 23 is a partially enlarged plan view of the right-angle rail 27 and the parallel rail 30. FIG. 5 is a front sectional view showing a rotation drive unit of the intersection rail 23, FIG. 6 is a side view thereof, and FIG. FIG. 8 is a side view of the truck drive wheel 35, and FIG.

 In FIG. 1, the entire configuration will be described.

The electric resistance welded tube roll forming machine shown in FIG. 1 illustrates a main part of a continuous steel pipe manufacturing plant.

A continuous strip-shaped steel sheet is supplied from the ERW pipe forming line L, and the strip-shaped flat plate is gradually bent into an arc shape by six sets of rolls placed on the forming roll stands A1 and B1. And the butted portion of the cylinder is welded by a seam welding mechanism G, then the outer bead of the weld is cut off by a weld outer bead cutting mechanism E, and then cooled by a weld cooling mechanism F. Next, distortion and bending are removed by the shaping roll stands C1 and D1, and shaped into a shape close to a perfect circle. As a subsequent process of the shaping roll stands C1 and D1, a die set is disposed, and performs an operation of cutting the continuous steel pipe to a predetermined length.

The present invention, in such a continuous steel pipe manufacturing plant,
When manufacturing steel pipes of different diameters, the exchange of forming rolls and shaping rolls is easily performed.

For this purpose, six sets of forming rolls are mounted on two forming roll stands A1 and B1, and another two forming roll stands A2 and B2 to be replaced with the forming roll stands A1 and B1 are provided. It is arranged offline, and the forming roll stands A1 and B1 and the forming roll stands A2 and B2 can be replaced by running on rails.

Similarly, as for the shaping rolls, five shaping rolls are placed on two shaping roll stands C1 and D1, and the same shaping roll stands C2 and D2 are arranged on the off-line, and on the rails. Both are interchangeable.

The running rail includes a right-angle rail 27 arranged in a direction perpendicular to the ERW pipe forming line L, a parallel rail 30 arranged in a direction parallel to the ERW pipe forming line L, and a retreating parallel rail retreating at the time of replacement.
26, and an intersection rail 23 provided at the intersection of the right-angle rail 27 and the parallel rails 30 and 26.

Then, the sides of the forming roll stands A1 and B2 are retracted from the ERW tube forming line L along the right angle rail 27, and the intersection rail 23 is rotated 90 degrees while being positioned on the four intersection rails 23. The bogie drive wheel 35 on the intersection rail 23 is also 90
Then, the two units are retracted in the retracted parallel rail 26.

Next, return the intersection rail 23 to the direction parallel to the right-angle rail 27,
The off-line forming roll stands A2 and B2 are moved to the ERW tube forming line L and fixed on-line.

Next, the intersection rail 23 is made parallel to the escape parallel rail 26, and the forming roll stands A1, B1 retracted to the escape parallel rail 26 are returned to the intersection rail 23 again, and the intersection rail 23 and the bogie drive wheel 35 are returned.
At the same time, it rotates 90 degrees and returns to the direction of the right-angle rail 27, and returns to the offline position.

The forming roll is exchanged in a state where the roll is returned to the off-line position.

The same applies to the shaping roll stands C1 and D1. First, the rail moves from the right-angle rail 27 to the intersection rail 23, and the parallel rail 26 retracts.
Evacuate to the side, then off-line shaping roll stand
C2 and D2 are moved onto the ERW pipe forming line L, and then the shaping roll stands C1 and D1 on the retreating parallel rail 26 are crossed at the intersection rail.
Go back above 23, change direction, go offline,
At this position, the shaping roll for the next diameter is replaced.

Next, the shaping roll stands C1 and D1 will be described with reference to the drawings of FIGS.

Since the configuration of the forming roll stands A1 and B1 is substantially the same as the configuration of the shaping roll stands C1 and D1, the shaping roll stands C1 and D1 will be described.

The roll drive motor 1 is fixed on the fixed stand 40, and the output shaft of the roll drive motor 1 is input to the primary reduction gear 2. An automatic shaft coupling 3 is interposed on the output shaft of the primary side reduction gear 2, and is configured to transmit power to the shaping roll stand C1 by connecting and disconnecting the automatic shaft coupling 3.

The output rotation from the automatic shaft coupling 3 is controlled by the secondary reduction gear 4.
The rotation transmitted to 5.6 and reduced by the respective secondary-side reduction gears is transmitted to the shaping rolls 8, 9, and 10 as power.

The shaping rolls 8, 9, and 10 are provided with upper and lower shaping rolls, respectively, and the upper and lower rolls remove distortion and bending of the continuous steel pipe after bead welding, and shape the steel pipe into a state close to a perfect circle.

Similarly, the roll drive motor is also provided on the fixed side stand 41 side.
An output shaft of the roll drive motor 19 is transmitting power to the primary speed reducer 18. The primary speed reducer 18
Is transmitted to the secondary reduction gears 16 and 15 via the automatic coupling 17.

Power is transmitted from the secondary reduction gears 16 and 15 to the shaping rolls 11 and 12, and the shaping rolls 11 and 12 also perform shaping rolls.

13 and 14 are four-way shaping rolls each having its own drive motor.

The present invention provides a shaping roll stand C1
D1 and the forming roll stands A1 and B1 are each supported by four bogie driving wheels 35 so as to be able to drive and run on the rail.

Next, a rotation driving mechanism of the intersection rail 23 will be described with reference to FIGS.

The intersection rail 23 has a truck driving wheel 35 placed thereon, and the bogie driving wheel 35 is configured such that the bogie driving wheel 35 is stable, and a fitting recess 23a is formed in the center. The lower surface is fitted so as to be stable.

The intersection rail 23 is rotated 90 degrees by the actuator 25
And expanded and contracted by air pressure or hydraulic pressure. A rack of a pinion rack mechanism 24 is fixed to the end of the actuator 25, and the pinion in the pinion rack mechanism 24 is rotated by the rack, and the rotation is the rotation of the gear 20. The gear 20 meshes with the gear 21 of the rotating shaft 22, and rotates the rotating shaft 22. The rotating shaft 22 is an intersection rail 23
The intersection rail 23 rotates 90 degrees due to the expansion and contraction of the actuator 25.

The intersection rail 23 is disposed at four corners of the intersection of the right angle rail 27 and the parallel rail 30.

Therefore, by rotating the intersection rail 23 by 90 degrees, the state where the intersection rail 23 is connected to the right-angle rail 27 and the state where it is connected to the parallel rail 30 are switched.

Next, a drive mechanism of the bogie drive wheels 35 will be described with reference to FIGS.

The truck drive wheels 35 are rotated by the wheel drive motor 43 to move the truck.

That is, the bevel gear 28 is rotated by the wheel drive motor 43,
Power is transmitted from the bevel gear 28 to the bevel gear 29 and the shaft 31.

The bevel gears 32 and 34 at the lower end of the shaft 31 are rotated, and the bogie drive wheels 35 on the axle 33 are rotated.

The bogie drive wheel support cylinder 46 is supported by a bogie via a thrust bearing so that the bogie drive wheel 35 can rotate 90 degrees with the rotation of the intersection rail 23.

When reaching the intersection rail 23 and rotating the intersection rail 23, a stopper pin 47 is provided which can be detached so that the bogie driving wheel support cylinder 46 is freely rotatable with respect to the bogie.

The stopper pin 47 is configured to be freely protruded and stored by an actuator 46.

Stopper fitting holes 45 into which the stopper pins 47 are fitted are formed in two places at an angle of 90 degrees on the bogie driving wheel support cylinder 46. Therefore, only when rotating on the intersection rail 23, the stopper pin 47 is removed, and after the rotation, the stopper pin 47 is fitted in the stopper fitting hole 45 again.

(F) Effects of the Invention The present invention is configured as described above, and has the following effects.

As described in claim (1), two sets of roll stand carts arranged at the same position are arranged on the traveling rail, and one set of roll stand carts is formed on the ERW pipe forming line L during the forming operation. Another roll stand cart is placed off-line so that the work of assembling the rolls of different diameters can be performed in parallel, and when changing the diameter of the electric resistance welded tube, two sets of roll stand carts are connected to the parallel rail 30 and the right-angle rail 27. Since it is possible to change the rolls on and off, the exchange of the bogie is automated by sequence control, so if you finish changing the rolls of different diameters offline, simply press the exchange switch and you can easily mold The exchange of rolls and shaping rolls can be completed, eliminating the need for overhead cranes and traveling forklifts.

In the running rail on which the roll stand cart travels, a right-angle rail 27 laid in a direction perpendicular to the ERW pipe forming line L and a laying in a direction parallel to the ERW pipe forming line in claim (2). Parallel rails 30 and 26 are provided, the two having an intersection, and the rail at the intersection is divided into a sufficient length for mounting the traveling wheels of the roll stand trolley, and the intersection rail 23 Is a right angle rail 27
And can be driven to rotate between the parallel rail 30
By providing the 30 and the evacuation parallel rail 26 and the intersection rail 23, it becomes possible to move two sets of trucks back and forth, and it is possible to exchange two trucks online and offline in a state where they are arranged in a plane. It has become.

An electric motor which uses a battery power source as a power source on a roll stand truck on which a plurality of stands of a roll stand for forming an electric resistance welded tube and a drive gear reducer for driving each roll are provided, as claimed in claim (3). A traveling wheel that is rotationally driven through a gear mechanism is installed, and the traveling wheel enables a turning operation around a vertical axis of the wheel. Therefore, the turning operation is further locked if necessary. And unlocking, so that the bogie drive wheel 35 can revolve at the intersection rail 23, and at other positions it can be locked to prevent movement and vibration. Thus, it can be fixed on the sewing tube forming line L with less vibration.

As in claim (4), the roll drive motor 1 and the primary reduction gear 2 are arranged on the fixed stand 40, the secondary reduction gear 4 is arranged on the side of the roll stand cart, and the primary reduction gear 2 is arranged.
Since the automatic coupling 3 was interposed between the secondary reduction gear 4 and
The automatic coupling 3 is driven by an actuator, and the operation of this actuator is incorporated in the same sequence control as that of the operation of the bogie, so that simply by pressing the exchange switch, the exchange of the roll and the detachment of the power transmission system are automatically performed. You can do it.

[Brief description of the drawings]

FIG. 1 is an overall plan view showing a roll stand exchange mechanism of an electric resistance welded tube roll forming machine, FIG. 2 is an enlarged plan view showing a part of a roll stand cart, FIG. 3 is a side view thereof, and FIG. 23 is a partially enlarged plan view of the right-angle rail 27 and the parallel rail 30. FIG. 5 is a front sectional view showing a rotation drive unit of the intersection rail 23, FIG. 6 is a side view thereof, and FIG. FIG. 8 is a side view of the truck drive wheel 35, and FIG. A1 · B1 · · · Forming roll stand C1 · D1 · · · Shaping roll stand 1 · · · · Roll drive motor 2 · · · · primary speed reducer 3 · · · · automatic shaft coupling 4,5,6 · · · secondary speed reducer 8,9 , 10 …… Shaping roll 23 …… Intersection rail 26 …… Escape parallel rail 27 …… Right angle rail 35 …… Bogie drive wheel

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-289919 (JP, A) JP-A-61-289918 (JP, A) JP-A-59-147712 (JP, A) 143002 (JP, A) US Patent 4,709,845 (US, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B21B 31/08 B60S 13/02 B61F 3/04 B21C 37/08

Claims (4)

(57) [Claims] 1. Two sets of roll stand carts arranged at the same position are arranged on a traveling rail at a time, and one set of roll stand carts is formed on an ERW pipe forming line L during a forming operation.
Other roll stand carts are placed off-line, and the work of incorporating rolls of different diameters can be performed in parallel.When changing the diameter of the ERW pipe, two sets of roll stand carts must be connected to a parallel rail and a right-angle rail. A method for replacing a roll stand of an electric resistance welded tube roll forming machine, characterized in that the roll stand can be replaced and run. 2. A running rail on which a roll stand carriage travels, wherein a right-angle rail laid in a direction perpendicular to the ERW pipe forming line L and a parallel rail laid in a direction parallel to the ERW pipe forming line. And both have an intersection,
The rail at the intersection is divided into a length sufficient to mount the traveling wheels of the roll stand bogie, and the intersection rail 23 can be driven to turn between the right-angle rail 27 and the parallel rail 30 by a turning drive mechanism. A roll stand exchange mechanism for an ERW pipe roll forming machine. 3. An electric motor using a battery power source as a power source, and a gear mechanism on a roll stand carriage on which a plurality of roll stands for forming an electric resistance welded tube, a drive gear reducer for driving each roll are mounted. A traveling wheel, which is rotatably driven through the wheel, and the traveling wheel enables a turning operation around a vertical axis of the wheel, and further, the turning operation can be performed by a locking and unlocking mechanism as required. The roll stand exchange mechanism of the ERW pipe roll forming machine, characterized in that it is attached. 4. A roll drive motor 1 and a primary reduction gear 2 are arranged on a fixed stand 40, and a secondary reduction gear 4 is arranged on a side of a roll stand cart. A roll stand exchange mechanism for an electric resistance welded tube roll forming machine, wherein the automatic shaft coupling 3 is interposed between the side reduction gears 4.