JPH04118104A - Method and mechanism for changing roll stand of resistance-welded tube roll forming machine - Google Patents

Abstract

PURPOSE:To easily change the forming roll and the correcting roll and to make the overhead crane or the traveling fork lift unnecessary by arranging the other roll stand truck on the off-line during the forming work of the resistance-welded tube with one set of the roll stand truck, and making the assembling work for the different diameter roll possible as parallel operating. CONSTITUTION:In the state that the sides of the forming roll stands A1, B1 are moved backward from the resistance-welded tube forming line L along on the orthogonal rail 27 and positioned on 4 points of intersecting point rails 23, the intersecting point rail 23 is turned by 90 degree, also the truck driving wheel mounted on this intersecting point rail 23 is turned by 90 degree, next, 2 stands together are saved in the saving parallel rails 26. Next, the intersecting point rail 23 is returned to the parallel direction with the orthogonal rail 27, the forming roll stands A2, B2 on the off-line are moved to the resistance-welded forming line L, and fixed to the on-line. Next, the intersecting point rail 23 is made parallel with the saving parallel rail 26, the forming roll stands A1, B1 saved to the saving parallel rail 26 are returned again on the intersecting point rail 23, the intersecting point rail 23 and the truck driving wheel 35 are turned by 90 degree at the same time, returned to the direction of orthogonal rail 27 and returned to the position of the off-line. In the returned state to this off-line, the change of the forming roll is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial field of application The present invention is directed to a continuous steel pipe manufacturing plant that continuously manufactures steel pipes, in which a roll forming machine, which is the core of an electric resistance welded pipe roll forming machine, changes the diameter of a steel pipe. The present invention relates to a stand exchange method and an exchange mechanism.

(b) Prior Art Conventionally, as described in U.S. Patent No. 4,709,845, the turret mill system has been used to create four square cylinders arranged horizontally.
The technique of arranging forming rolls for forming rolls of four different diameters on a surface is known.

However, with this method, the stand structure becomes too large for mills with steel pipe diameters of 4 mm or more, making practical design and manufacture difficult.

There is also a known method in which only one set of roll stands is installed on the ERW pipe forming line, and when changing the pipe size, the rolls on each stand are replaced one by one using an overhead crane, etc. It is said that
In this case, it takes too much time to change the rolls, causing a problem in that there is a large time loss in stopping the plant.

It is also known that a plurality of roll stands for ERW pipe forming are mounted on one bed, two sets of each are prepared, and the bed is replaced using an overhead crane or the like. However, it is the same as the conventional method in that it takes time to replace the rolls, and there is a large production loss.

In addition, a plurality of roll stands for ERW tube forming are placed on a child cart, and the child cart is further placed on a parent cart, and the roll stands can be transferred offline from above the ERW pipe forming line to the parent cart. A known method is to replace the roll stand at the off-line position by replacing the subcart, but in this case as well, the problem is that the scale of the equipment becomes large and the amount of equipment investment becomes too large. There was a problem.

(c) Problems to be Solved by the Invention The present invention provides a roll stand replacement method and replacement mechanism for an electric resistance welded pipe roll forming machine that eliminates the problems of these conventional techniques.

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

Two sets of roll stand carts placed at the same position are placed on the traveling rail, and one set of roll stand carts is placed on the ERW pipe forming line L, and during the forming operation, the other roll stand carts are moved offline. The system is arranged so that the installation work of different diameter rolls can be operated in parallel, and when changing the diameter of the ERW pipe, two sets of roll stand carts can be exchanged and run on parallel rails and right-angled rails. It is.

In addition, in the running rail on which the roll stand truck runs, a right-angled rail 27 is laid in a direction perpendicular to the ERW pipe forming line L, and a parallel rail 30 is laid in a direction parallel to the ERW pipe forming line. The two have an intersection, and the rail at the intersection is divided into a length long enough to accommodate the running wheels of the roll stand truck, and the intersection rail is divided into a right angle rail and a right angle rail by a swing drive mechanism. It is possible to rotate between parallel rails.

In addition, multiple stands of roll stands for ERW tube forming,
A roll stand cart equipped with a drive gear reducer that drives each roll is equipped with an electric motor powered by a battery power source and running wheels that are rotationally driven via a gear mechanism, and The wheels are capable of pivoting about the vertical axis of the wheel, and are provided with locking and unlocking mechanisms as required for the pivoting motion.

In addition, the roll drive motor 1 and the primary speed reducer 2 are arranged on the fixed side stand 40, and the two are placed on the side of the roll stand cart.
A secondary reduction gear 4 is arranged, and an 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 by the present invention and the means for solving them are as described above.Next, the structure of the embodiment shown in the attached drawings will be explained.

Fig. 1 is an overall plan view showing the roll stand exchange mechanism of an ERW pipe roll forming machine, Fig. 2 is an enlarged plan view showing the roll stand cart, Fig. 3 is a side view, and Fig. 4 is an intersection rail. 23, the right angle rail 27, and the parallel rail 300. Fig. 5 is a front cross-sectional view showing the rotation of the intersection rail 23 and the drive section. Fig. 6 is a side view of the intersection rail 23. Fig. 7 is a side view of the roll stand cart. The front sectional view of the truck drive wheel 35 and FIG. 8 are also side views.

Referring to FIG. 1, the overall configuration will be explained.

The ERW pipe roll forming machine shown in FIG. 1 illustrates the main parts of a continuous copper pipe manufacturing plant.

A continuous strip steel plate is supplied from the ERW pipe forming line L, and six sets of rolls placed on the forming roll stand Al-B10 gradually bend the strip plate into an arc shape, and finally the butt part is bent. The butt portions of the cylinders are welded by a seam welding mechanism G, the welded part outer bead is cut and removed by a welded part outer bead cutting mechanism E, and then cooled by a welded part cooling mechanism F, Next, distortion and deflection are removed using shaping roll stands C1 and Dl, and the shape is shaped into a nearly perfect circle. The shaping roll stand C1・
A die set is arranged as a subsequent process of Dl,
It functions to cut continuous steel pipes into predetermined lengths.

In such a continuous steel pipe manufacturing plant, the present invention allows the forming rolls and shaping rolls to be easily replaced when manufacturing steel pipes of different diameters.

For this purpose, six sets of forming rolls are placed on two forming roll stands A1 and B1, and two forming roll stands A2 and B2 are placed to replace the forming roll stands A1 and B1. Placed offline, forming roll stands A1/B1 and forming roll stands A2/
B2 can be replaced by running on rails.

Similarly, for the shaping roll, a 5Mi shaping roll is placed on two shaping roll stands C1 and Dl, and the same shaping roll stands C2 and B2 are placed above the offline line, and the shaping roll is placed on the rail. The two are interchangeable.

The running rails include a right-angled 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, a retractable parallel rail 26 that is retracted at the time of replacement, and a right-angled rail 27 arranged in a direction perpendicular to the ERW pipe forming line L; 27 and an intersection rail 23 provided at the intersection of parallel rails 30 and 26'.

Then, the side of the forming roll stand AI/B1 is retreated from the ERW pipe forming line L along the right angle rail 27, and is positioned above the intersection rail 23 at four points, and the intersection rail 2
3 is rotated 90 degrees, the bogie drive wheels 35 riding on the intersection rail 23 are also rotated 90 degrees, and then both vehicles are retreated into the evacuation parallel rails 26.

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

Next, the intersection rail 23 is made parallel to the evacuation parallel rail 26, and the forming roll stands A1 and B are retracted to the evacuation parallel rail 26.
1 again onto the intersection rail 23, rotate the intersection rail 23 and the bogie drive wheel 35 by 90 degrees at the same time, and move the right angle rail 27.
direction and return it to the offline position.

The forming roll is replaced in the state where it is returned to the off-line position.

The same goes for the shaping roll stands C1 and Dl, which first move from the right angle rail 27 to the top of the intersection rail 23, retreat to the evacuation parallel rail 26 side, and then move the shaping roll stands C2 and B2 on the offline side to the ERW pipe. Move onto the forming line L, and then move to the forming roll stand C1 above the evacuation parallel rail 26.
- Dl is returned to the top of the intersection rail 23, the direction is changed, and it is returned offline, and at this position the shaping roll for the next diameter is replaced.

Next, the shaping roll stands C1 and Dl will be explained based on the drawings of FIGS. 2 and 3.

The configuration of the shaping roll stands A1 and B1 is substantially the same as that of the shaping roll stands C1 and Dl, so the shaping roll stands C1 and Dl will be explained.

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

The output rotation from the automatic shaft coupling 3 is secondary side reduction @4.5
- The rotation transmitted to the rollers 6 and decelerated by the respective secondary speed reducers transmits power to the shaping rolls 8, 9, and 10.

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

Similarly, a roll drive motor 19 is also arranged on the side of the fixed stand 41 , and the output shaft of the roll drive motor 19 transmits power to the primary speed reducer 18 . The rotation of the primary speed reducer 18 is transmitted to the secondary speed reducers 16 and 15 via the automatic shaft coupling 17.

Power is transmitted from the secondary reducers 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 separately equipped with its own drive motor.

The present invention provides a shaping roll stand C1 configured as described above.
Dl and forming roll stands A1 and B1, respectively, 4
The bogie drive wheels 35 support the bogie so that it can run on the rails.

Next, the rotation drive mechanism of the intersection rail 23 will be explained with reference to FIGS. 4, 5, and 6.

The intersection rail 23 has a fitting recess 23a in the center on which the bogie drive wheel 35 is placed, and the bogie drive wheel 35 is stabilized.
The bogie drive wheel 3 is installed in this fitting recess 23a.
The lower surface of 5 is fitted to stabilize the structure.

The actuator 25 rotates the intersection rail 23 by 90 degrees, and is expanded and contracted by pneumatic or hydraulic pressure. A rank of the pinion rack mechanism 24 is fixed to the tip of the actuator 25, and the rank allows the pinion
A pinion within the rack mechanism 24 is rotated, and this 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 rotation shaft 22 is fixed to the intersection rail 23, and the expansion and contraction of the actuator 25 causes the intersection rail 23 to rotate 90 degrees.

The intersection rails 23 are arranged at the 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, it can be switched between a state where it is connected to the right angle rail 27 and a state where it is connected to the parallel rail 30.

Next, referring to FIGS. 7 and 8, the drive mechanism of the truck drive wheels 35 will be explained.

The wheel drive motor 43 rotates the truck drive wheels 35 to move the truck.

That is, the bevel gear 28 is rotated by the wheel drive electric motor 43, and 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 truck drive wheel 35 on the axle 33 is rotated.

A bogie drive wheel support cylinder 46 is supported by the bogie via a thrust bearing so that the bogie drive wheel 35 can rotate 90 degrees as the intersection rail 230 rotates.

Then, when reaching the top of the intersection rail 23 and rotating the intersection rail 23, a stopper pin 47 is provided which can be removed so that the bogie drive wheel support tube 46 can freely rotate relative to the bogie.

The stopper bin 47 is configured to be able to be protruded and stored by an actuator 46.

Stopper fitting holes 45 into which the stopper pins 47 fit are formed at two locations on the bogie drive wheel support cylinder 46 at an angle of 90 degrees.

Therefore, the stopper pin 47 is removed only when rotating on the intersection rail 23, and then the stopper pin 47 is fitted into the stopper fitting hole 45 again after rotation.

(F) Effects of the Invention Since the present invention is constructed as described above, it has the following effects.

As shown in claim 11, 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 placed on the electric resistance welding pipe forming line L, and during the forming operation, other A roll stand cart is placed offline to enable parallel operation of installing rolls of different diameters.
When changing the diameter of the ERW pipe, two sets of roll stand carts can be exchanged and run on the parallel rail 30 and the right angle rail 27, so the changing of the carts is automated by sequence control. By completing the reassembly of rolls with different diameters offline, the exchange of forming rolls and shaping rolls can be completed simply by pressing the exchange switch, eliminating the need for overhead cranes or traveling forklifts. .

As claimed in claim (2), in the running rail on which the roll stand cart runs, there is a right angle rail 27 laid in a direction perpendicular to the ERW tube forming line L, and a right angle rail 27 laid in a direction parallel to the ERW tube forming line. provided with parallel rails 30 and 26,
The two have an intersection, and the rail at the intersection is divided into a length long enough for the traveling wheels of the roll stand truck to be placed, and the intersection rail 23 is parallel to the right angle rail 27 by a turning drive mechanism. Since it is possible to rotate between the rails 30,
By providing the parallel rails 30, the evacuation parallel rails 26, and the intersection rails 23, it becomes possible to exchange two sets of bogies, and it is possible to exchange the two bogies on-line and off-line while they are arranged in a plane. It became possible.

As claimed in claim (3), a roll stand truck equipped with a plurality of roll stands for ERW tube forming and a drive gear reducer for driving each roll is equipped with an electric motor powered by a battery power source; A running wheel that is rotatably driven via a gear mechanism is installed, and the running wheel is capable of turning around the vertical axis of the wheel, so that the turning movement can be locked if necessary. Since it is configured to be locked and unlocked, the bogie drive wheels 35 can revolve around the intersection rail 23, and can be locked at other positions to prevent movement and vibration. Even on the sewing tube forming line L, it is now possible to fix the tube in a state with little vibration.

As in claim (4), the roll drive motor 1 and the primary speed reducer 2 are arranged on the fixed stand 40, the secondary speed reducer 4 is arranged on the side of the roll stand cart, and the primary speed reducer 2 and Since the automatic shaft coupling 3 is interposed between the secondary reducer 4, the automatic shaft coupling 3 is driven by an actuator, and the operation of this actuator is incorporated into the same sequence control as the operation control of the truck. Just by pressing the exchange switch, rolls can be exchanged and the power transmission system can be attached and detached automatically.

[Brief explanation of drawings]

Fig. 1 is an overall plan view showing the roll stand exchange mechanism of an ERW pipe roll forming machine, Fig. 2 is an enlarged plan view showing the roll stand cart, Fig. 3 is a side view, and Fig. 4 is an intersection rail. 23, right angle rails 27, and parallel rails 30, FIG. 5 is a front sectional view showing the rotation drive section of the intersection rail 23, FIG. 6 is a side view, and FIG. 7 is a side view of the roll stand truck. The front sectional view of the truck drive wheel 35 and FIG. 8 are also side views. AI・B1・・Forming roll stand C1・Dl・・
...Orthopedic roll stand...Roll drive motor 2...Primary side reduction gear 3...Automatic shaft coupling 4.5.6...Secondary side reduction gear 8, 9. 10... Shaping roll 23... Intersection rail 26... Evacuation parallel rail 27... Right angle rail 35... Bogie drive wheel

Claims (4)

[Claims] (1) Two sets of roll stand carts placed at the same position are placed on the traveling rail, and one set of roll stand carts is on the ERW pipe forming line L during forming operation while the other roll stand carts is placed offline, allowing work to assemble rolls of different diameters in parallel, and when changing the diameter of ERW pipes, two sets of roll stand carts can be exchanged and run on parallel rails and right-angled rails. A method for replacing a roll stand of an ERW tube roll forming machine. (2) In the running rail on which the roll stand truck runs, a right-angled rail is laid in a direction perpendicular to the ERW pipe forming line L, and a parallel rail is laid in a direction parallel to the ERW pipe forming line. , the two have an intersection, and the rail at the intersection is divided into a length long enough for the traveling wheels of the roll stand truck to be placed, and the intersection rail 23 is divided into a right angle rail by a turning drive mechanism. 27 and parallel rails 30. A roll stand exchange mechanism for an electric resistance welded pipe roll forming machine, characterized in that it is capable of rotating between the rails 27 and 30. (3) A roll stand cart equipped with multiple stands of roll stands for ERW tube forming and a driving gear reducer that drives each roll is connected to a motor powered by a battery power source and a gear mechanism. A running wheel is provided which is rotatably driven by the wheel, and the running wheel is capable of turning movement about the vertical axis of the wheel, and further includes a locking and unlocking mechanism for the turning movement as necessary. A roll stand exchange mechanism for an ERW tube roll forming machine characterized by being attached. (4) The roll drive motor 1 is mounted on the fixed side stand 40.
and the primary side reducer 2 are arranged, the secondary side reducer 4 is arranged on the side of the roll stand truck, and the automatic shaft coupling 3 is interposed between the primary side reducer 2 and the secondary side reducer 4. A roll stand exchange mechanism for an ERW pipe roll forming machine featuring: