JPS58122109A - Method for connecting material to be hot-rolled - Google Patents

Abstract

PURPOSE:To remarkably improve connecting efficiency, by constituting a traveling connector with the preceding traveling connector and the succeeding traveling connector. CONSTITUTION:In a roughing mill 1, the tail end part of the preceding material 5 to be rolled moves in the inside of the preceding traveling connector A started previously, and when the end part arrives at the clamping position, a lower clamp supporting plate 20 is raised to raise the upper surfaces of projections 19 and 19' used for clamping to the upper side above a pass line by driving cylinders 22 and 22' used for driving a clamp. On the other hand, the heading end part of the succeeding material 5' to be rolled is cut by a crop shear 8 to enter the succeeding traveling connector B, and begins to move in rapid acceleration. And the upper surface of projections 19 and 19' used for clamping are raised to the upper side above the pass line to make both materials 5 and 5' abut onto each other by driving the cylinders 22 and 22' used for driving the clamp. In said state, both materials 5 and 5' are bitten by a group of finish mills 2 by applying an electric current on the upper and lower supporting plates 16 and 20, respectively.

Description

[Detailed description of the invention] The present invention relates to a method for connecting hot rolled materials.

In conventional hot rolling lines, rolling materials are rolled one by one by discontinuous rolling, in which rough rolling and finishing rolling are performed. Therefore, each rolled material had to be smoothly bitten by the upper and lower rolls of the rough rolling mill group and the finishing rolling mill group, respectively, and it was necessary to adjust the tip shape and plate thickness of each rolled material. After finish rolling of the tip, it was necessary to reduce the speed in order to smoothly pass the sheet to the coiler. Furthermore, there is a space between the preceding rolled material and the subsequent rolled material, where no rolling work is performed, resulting in the problem of low effective utilization of equipment and poor production efficiency.

Therefore, the present patent applicant sequentially lowered each roller of the conveying roller table 3 installed between the rough rolling mill group 1 and the finishing rolling mill group 2 shown in FIG. The leading rolled material 5 and the trailing rolled material 5' are connected while being rolled, and after the connecting machine 4 has passed, the valley rollers are raised to their original positions and the rolled materials are conveyed. In the figure, 6 is a heating furnace, 7 is a coiler, and 8 is a crop shear.

Although the above-mentioned invention has been able to solve various problems in discontinuous rolling, it is necessary to raise and lower all the rollers in the running range of the rolling connector, which requires large-scale equipment. In the above method, since it is necessary to start the run of the running joint machine together with the rear end of the preceding rolled material, there is a distance of several meters between the trailing rolled material and the running joint machine.
In order to smoothly pass the tip of the trailing rolled material, the pitch of each roller must be 1 m or less, and a large number of rollers are required.

Therefore, the inventors of the present invention have conducted extensive research in order to eliminate the above-mentioned drawbacks of the conventional technology by increasing the pitch of each roller, and have found that the problem can be solved by dividing the running connector into two parts. This is what was discovered and proposed as the present invention.

The method of the present invention will be explained in detail based on the embodiment shown in FIG.

Since the configurations of the two connecting machines A and B are the same and each member is arranged in symmetrical positions, the one connecting machine B between the trailing running
is constructed as shown in FIGS. 4 and 5. That is, the wheels 13 are mounted on the rails 12 and 12' installed on the lower surface of both legs 11 and 11' of the portal-shaped traveling frame 10 and on the outer side and lower side of the transport roller table 3. --- is rotatably attached to four places 0 and both legs 11, 11
Clamp guides 14 and 1 on the path line advancing side of '
4' is fixed in the vertical direction.

Both clamp guides 14, 14' have a lower surface 2 on the upper side.
The upper clamp support plate 16 protruding from the clamping protrusions 15 and 15'i is fitted in such a way that it can be raised and lowered, and the traveling frame 10
Clamp drive cylinder 18, 1' attached to the top plate 17 of
It is designed to be driven by 8'. Further, on the lower side of both clamp guides 14 and 14', a clamping protrusion 19 is provided on the upper surface.
．． A clamp drive cylinder 22 is fitted with a lower clamp support plate 20 having a protruding portion 19′ and is attached to support plates 21 and 21/ that are protruded from the inner surface of the lower part of both legs 11 and 11′.
, 227. 2 in Figure 4
3 and 25' are fixed rollers supported by both legs 11 and 11/.

Since the other configurations are the same as those in FIG.
0 indicates a fixed roller, and 3-1 to 3-n each indicate a lifting roller.

The connecting machines A and B are constructed as described above, and after the rear end of the preceding rolled material 5 leaving the rough rolling mill group 1 is cut by the crop shear 8, it is cut in order to increase the acceleration time. , move the preceding running connecting machine AV:J that has been started in advance. When the rear end of the preceding rolled material 5 reaches the crank position, the clamp drive cylinders 22 and 227 are driven to raise the lower clamp support plate 20 and the clamp protrusion 19
, 19/ is raised to some extent above the pass line.Meanwhile, the clamp drive cylinders 18 and 187 are also fully driven, and the upper clamp support plate 16 is lowered to clamp the rear end of the previously rolled material 5. It is held between the protrusions 15 and 157.

On the other hand, the leading end of the trailing rolled material 5' passes through the rough rolling mill group 1, is cut by a crop shear 8, and enters the trailing rolling connecting machine B. When the leading end of the trailing rolled material 5' enters, the trailing running connection m%B trailing rolled material 5' is immediately
Start moving by rapidly accelerating to match the speed of movement. Then, when synchronized, the clamp drive cylinder 22
, 22' raise the upper surfaces of the clamping protrusions 19 and 197 to a level slightly above the pass line, and then the trailing rolled material 5 is
', and at the same time drives the clamp drive cylinder 18°18' to clamp the protrusions 15, 15'.
is lowered to clamp the tip. Then, the trailing inter-running connecting machine B is accelerated to catch up with the preceding inter-running connecting machine 5, and the inter-rolled materials 5 and 5' are butted together. In this state, the pre-rolled material 5 is finished! : E is inserted into the rolling mill group 2, and the trailing rolled material 5' is inserted into the rough rolling mill group 1 and subjected to rolling work. In this state, while the running connectors A and B run, for example, current is applied to the upper and lower clamp support plates 16 and 20, respectively, to connect them in the same manner as in the prior art.

In addition, each elevator opening of the conveyance roller table 3 - Ra - 3-1 -
-,! -3=n is lowered in advance so as not to interfere with the running of both connecting machines A and B, and after passing, it is raised to the current position to support the rolled material.

Furthermore, when the measuring rolled material 5.degree. 5' is in the butted state, the two running connecting devices A and B may be in a state in which there is a gap between them or in a state in which they are in contact with each other.

After the gauging rolled materials 5, 5/ are connected, the double running joint connecting machine A
, B, respectively, clamp drive cylinders 18° 18' and 22
, 227 to drive the upper and lower clamp support plates 16 and 20 in the opposite direction to open the clamps and uncouple them from the gauging rolled materials 5 and 5', and return both running connecting machines A and B to their original positions. Return to At this time, each lifting roller 5-1, 512. -11 descends in the same way as when moving forward, but at the point where there are no rollers after descending, the rolled material is supported by fixed rollers 25 and 237 installed in running connections A and BK respectively. There is no possibility that the paper or rolled material will bend during the process.

The present invention is constructed as described above, and has a pre-rolled material 5.
After passing through the rough rolling mill group 1, the preceding rolling connecting machine A starts running together with the preceding rolling material 5, and there is a distance of ! between it and the following rolling material 5'. However, in the present invention, since the trailing running connecting machine B is present, the tip of the trailing rolled material 5' is connected to the lifting roller 5-1.5 of the conveying roller table 3. -2, + + - There is no possibility that it will bend downward and threading will become impossible. As a result, there is no need to set the pitch between the lifting rollers to about 1m as in the past, and the rolling material can be rolled! ! ! It is possible to set the pitch to 5m without any problem.

Therefore, the equipment cost is greatly reduced, and the lifting rollers can be easily controlled.

[Brief explanation of the drawing]

Figure 1 is a layout diagram showing the method of connecting hot-rolled materials in the earlier application;
The figure is a layout diagram of an embodiment of the method for connecting hot rolled materials according to the present invention, FIG. 3 is a layout diagram when connecting rolled materials, FIG. 4 is a side view of the trailing running connecting machine, and FIG. A front view taken along the v-v line in FIG. 4 is shown, respectively. In addition, in the figure, A is a connecting machine between leading running, B is a connecting machine between trailing running, and 3.
is the conveyor roller table, 3-1゜3-2 + ---
5-n is a lifting roller, 5 is a preceding rolling material, and 5' is a trailing rolling material. Patent applicant: Kawasaki Steel Corporation

Claims (1)

[Claims] In a method of connecting a leading rolled material and a trailing rolled material with a running connecting machine that can pass by independently lowering each elevating roller of a conveying roller table, the running connecting machine is connected to a leading running connecting machine and a trailing running connecting machine. The leading running connecting machine clamps the rear end of the preceding rolled material, the trailing running joining machine clamps the leading end of the trailing rolled material, and the trailing running joining machine clamps the leading end of the rolling material. A method for connecting hot-rolled materials, characterized in that internally rolled materials are butted and connected by catching up with each other.