JPH0562001B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention mainly relates to running joining of strip-shaped rolled materials (hereinafter referred to as sheet bars) supplied to a finishing rolling mill in a continuous hot rolling line. It is related to the device.

<Conventional technology> In a conventional hot rolling line, the rolled material (slab) is heated to the required rolling temperature in a heating furnace, rolled one by one in a rough rolling mill and a finishing mill, and then rolled into a coil shape in a coiler. Discontinuous rolling (batch rolling)
was going there. Therefore, the work involved adjusting the shape of the tail end of the running sheet bar and the head end of the trailing sheet bar that are supplied to the finishing rolling mill, as well as fitting each sheet bar between the rolls (work rolls) of the finishing rolling mill row. There was a problem that the effective utilization of equipment was reduced and production efficiency was poor.

Therefore, in order to solve this problem, as in the hot rolling line shown in the schematic arrangement diagram in FIG. The tail end of sheet bar 3a and the head end of trailing sheet bar 3b are joined by a joining device 4, rolled by a finishing mill 2, cooled to a required winding temperature by a cooling device 7, and then divided by a shear 8. A continuous rolling method has been proposed in which the material is wound alternately with two coilers 10a and 10b.

Here, as the joining device 4, a fixed type welding machine or the like is usually used. In addition, in the figure, 5 is an intermediate roller table, 6 is a run-out table, and 9a
and 9b indicate coiler pinch rolls, and arrow Z indicates the sheet passing direction (rolling direction) of the sheet bars 3a, 3b.

With the above configuration, when joining the leading sheet bar 3a and the trailing sheet bar 3b, the threading speed is stopped, and the clamping device (not shown) of the joining device 4 joins both sheet bars 3a and 3b. It was necessary to fix and weld the end portions, and it was not possible to prevent a decrease in production efficiency due to temporary interruption of the rolling operation for each joining operation.

<Problems to be Solved by the Invention> In order to prevent this, it is possible to make the joining device 4 a traveling type, but in this case, the traveling speed of the traveling joining device and the speed of the leading and trailing sheet bars must be adjusted. Since perfect matching with the conveyance speed cannot be expected, the leading sheet bar 3a and the trailing sheet bar 3
There was a problem in that a gap was formed between the joint edge of b and the joint edge could not be completely joined, and the effect of continuous rolling could not be fully demonstrated.

The present invention has been made in view of the current situation, and is capable of reliably joining the tail end of the traveling sheet bar 3a and the head end of the trailing sheet bar while self-running in synchronization with the sheet passing speed of the sheet bar during rolling. The object of the present invention is to provide a running joining device for strip-shaped plate materials in a continuous hot rolling line.

<Means for solving the problems> The configuration of the present invention to achieve the above object is to provide a front traveling bogie that can run on its own in synchronization with the threading speed of the strip-shaped plates in a continuous rolling line for strip-shaped plates. and a rear traveling bogie, a coupling device that connects the two traveling bogies so that the inter-vehicle distance between the two traveling bogies can be freely adjusted; a clamping device capable of individually and detachably clamping the head end edge of the leading strip material and the trailing end edge of the leading strip material; The present invention is characterized in that it is equipped with a welding machine that joins the head edges of the strip-shaped plate materials to each other.

<Function> With the above configuration, the preceding seat bar 3
This means that the joint edges of the seat bar 3a and the trailing seat bar 3b can be reliably joined in a state where they are crimped to each other so that no gap occurs between the joining edges.

<Example> Hereinafter, an example of the present invention will be described in FIG. 1, which is a partially sectional front view, and FIG. 2, which is a plan view of FIG. The third figure is
The explanation will be made based on the drawings and FIG. 4, which is a sectional view taken along line BB in FIG. 1.

As shown in the figure, the apparatus of the present invention includes a front (finishing mill side) traveling carriage 11, a rear (roughing rolling mill side) traveling carriage 11', a coupling device 12, a traveling drive device 13, a joining machine 14, and a clamping device 15. ,1
It consists of 5' main members.

The traveling carts 11, 11' are composed of frames 17, 17' with wheels 16, and an intermediate roller table 5.
It is possible to run forward and backward in the sheet passing direction Z along the rails 19 provided along the bases 18 on both sides of the intermediate roller table 5. In addition, both traveling trolleys 1
1 and 11' are connected via a coupling device 12 consisting of a pair of cylinders 12a and rods 12b attached to the left and right sides of frames 17 and 17' so that the distance between the bogies can be freely adjusted. It is possible to run on its own by means of a traveling drive device 13 attached to a truck (in the illustrated case, the front traveling truck 11). Although a cylinder is used as the coupling device 12 in the illustrated case, it may be a screw jack or the like, and in short, any device may be used as long as it has a function of freely adjusting the distance between the carts.

As shown in the figure, the traveling drive device 13 drives a pair of pinions 25, 25 attached to both sides of the frame 17 via drive shafts 22, 23, bevel gears 24a, 24b, and 24a', 24b' by a motor 20 and a speed reducer 21. By driving the pinions 25, 25 and rolling on the pair of racks 26, 26 on the base 18, both the carriages 11, 11' can be made to travel by themselves.

The welding machine 14 is a plurality of wire-type welding machines arranged in the width direction of the sheet bar 3, and is connected to both traveling carts 11,
Welding center (wire center) approximately in the middle of 11'
Frame 17 of front traveling truck 11 so that
is installed on.

Next, the clamp devices 15 and 15' have almost the same structure and are installed on the front traveling truck 11 and the rear traveling truck 11', respectively, and are installed oppositely on both the left and right sides with the seat bar 3 in between, and in the board width direction. It consists of a pair of clamp frames 27a and 27b that are movable in opposite directions to each other, a moving drive device 28 for the clamp frames 27a and 27b, and a plurality of presser rods 31 that are attached to the clamp frames 27a and 27b so as to be movable up and down via cylinders 29 and levers 30. ing.

The clamp frames 27a and 27b are connected to the truck frame 1 via the wheels 32 on the upper part of the clamp frames 27a and 27b, respectively.
7, 17' is supported on the upper rail 33 and moves along the guide beam 17a of the bogie frame 17, 17', and the lower end thereof has a plurality of claws 34 projecting inwardly (seat bar side). Provided in the direction of the plate,
The seat bar 3 is held between the claw 34 and the presser rod 31.
Both ends of a and 3b can be clamped and fixed vertically.
Further, the lower end surfaces of the clamp frames 27a and 27b are attached to the upper surface of the intermediate roller table 5 so as to provide an appropriate gap. The movement drive device 28 for the clamp frames 27a, 27b is composed of a motor 35, bevel gears 36a, 36b, and threaded shafts 38, 38 with a pair of left and right opposite screw nuts 37a, 37b, respectively.

Next, the operation of the apparatus of the present invention having the above configuration will be explained.

First, the running welding device is placed on standby at a predetermined position on the intermediate roller table 5, for example, at an appropriate position _X0 on the upstream side of the welding device 4 shown in FIG. At this _position Also, presser rod 3
Set the lifts No. 1 to their upper limit positions. In this state, the speed control device (not shown) controls the sheet passing speed of the trailing sheet bar 3b so that its head edge comes into contact with, or almost comes into contact with, the tail end edge of the leading sheet bar 3a. Seat bar 3a
Synchronize with the threading speed of In this state, the joining position of the sheet bars 3a, 3b during sheet passing is detected by a position sensor (not shown) installed at least upstream of the standby position _X0 , and the traveling drive motor 20 is controlled based on the signal. While running the traveling carts 11, 11' by themselves, synchronizing the threading speed of both sheet bars 3a, 3b, and aligning the welding center X of the welding machine 14 with the joining edges of both sheet bars 3a, 3b. Make it match. In this state, the clamping device 15,1
5' motor 35 and presser rod lifting/lowering cylinder 2
9 and the respective corresponding seat bars 3a
Both ends of the tail end portion and the head end portion of the clamp frames 27a, 27b and the presser rod 31 are clamped and fixed, and the connecting cylinder 1
2a is activated to press the joining edges of both seat bars 3a and 3b together, thereby eliminating gaps caused by running speed errors between the two seat bars. In this state, the joining machine 14 is operated to join both sheet bars 3a and 3b.

After joining is completed, reverse the above procedure to attach clamp device 1.
5 and 15' are released, both traveling carriages 11 and 11' are moved back to the standby position _X0 , and are put on standby in preparation for the next joining operation. Thereafter, the joining of the sheet bars 3 can be repeated using the same procedure.

<Effects of the Invention> As described above, according to the present invention, the two running carts, front and rear, arranged in the sheet bar passing direction, are synchronized with the sheet passing speed of the sheet bar that is supplied to the finishing rolling mill. While the vehicle is running on its own, the tail end of the leading seat bar and the head end of the trailing seat bar are individually fixed by clamp devices attached to both traveling vehicles, and both seats are secured by a connecting device. Since the sheet bars are connected to each other in a crimped state so that no gap occurs at the joining edges of the bars, reliable joining can always be achieved and the joining condition can be improved. Therefore, by using the present invention, the original functions of a continuous rolling line can be fully exhibited, which greatly contributes to improving productivity.

[Brief explanation of drawings]

1 to 4 show one embodiment of the present invention, in which FIG. 1 is a partially sectional front view, FIG. 2 is a plan view of FIG. 1, and FIG. A-A in Figure 1
4 is a sectional view taken along the line BB in FIG. 1, and FIG. 5 is a schematic arrangement diagram of a conventional continuous hot rolling line. Also, in the figures, 3, 3a, 3b are seat bars, 11 is a front traveling truck, 11' is a rear traveling truck, 12 is a coupling device, 13 is a traveling drive device, 14
1 is a welding machine, 15 and 15' are clamp devices, and Z is a direction of sheet threading.

Claims (1)

[Claims] 1. In a continuous rolling line for strip plate materials, a front traveling bogie and a rear traveling bogie that can run on their own in synchronization with the threading speed of the strip plate material, and a connection that connects the two traveling bogies so that the inter-vehicle distance between the two traveling bogies can be freely adjusted. a clamping device that is attached to each of the two traveling carriages and is capable of individually and detachably clamping the tail end edge of the leading strip-shaped plate material and the head end edge of the trailing strip-shaped plate material, respectively; The invention is characterized in that it is equipped with a welding machine that is installed on either one of the traveling carts and that is located approximately in the middle of the two, and that joins together the tail end edge of the preceding strip material and the head end edge of the trailing strip material material. A running joining device for strip-shaped plate materials.