JP3084860B2 - Rolled material cutting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cutting the end of a rolled material when welding the rear end of the preceding rolled material and the tip of the succeeding rolled material in a hot rolling line. .

[0002]

2. Description of the Related Art FIG. 6 shows a conventional example of this type of apparatus.
This is a type called a drumshaft. A pair of upper and lower rotatable drums 3 and 3 are held by a drum chuck 2 provided in a housing 1, and the drums 3 and 3 are synchronized with the transfer of the rolled material 4. The rolling material 4 is configured to be cut by a pair of knives 5 and 5 attached to each of the drums 3 and 3 while the rolling material 4 is passed between the drums 3 and 3 while being rotated. is there. In the case of the illustrated example, since the cutting is performed while transferring the rolled material 4 in the rolling direction (right side), the upper drum 3 is rotated counterclockwise and the lower drum 3 is rotated clockwise. Has become. Reference numeral 6 denotes a pressing mechanism for moving the drums 3, 3 up and down in order to adjust the interval between the drums 3, 3 according to the thickness of the rolled material 4. For example, a wedge or a screw is used. Have been.

[0003]

By the way, the shape of the cut surface by the above-mentioned apparatus is determined by the shapes of the knives 5 and 5 and the rolled material 4.
Is determined by the sheet thickness of the rolled material 4, the transfer speed of the rolled material 4 and the rotation speed of the drums 3 and 3 synchronized therewith. In any case, when cutting is performed under the same conditions, FIGS. Usually, the shape of the cut surface is asymmetrical on both sides of the cutting position as shown in FIG. FIG. 7 shows a state in which the rear end portion of the preceding rolled material 41 is cut. In this case, the new rear end surface 41a formed by cutting has a convex curved surface, but the front end surface of the chip 40 to be discarded. 40a is a relatively flat surface. FIG. 8 shows a state in which the leading end portion of the succeeding rolled material 42 is cut. In this case, the new leading end surface 42a formed by the cutting becomes a relatively flat surface, but the cut end to be discarded. The rear end surface 43a of the waste 43 has a convex curved surface. 7 and 8 indicate the direction in which the rolled materials 41 and 42 are transferred and the direction in which the knives 5 and 5 rotate.

For this reason, in the case of the above-mentioned conventional apparatus, the rear end face 4 of the preceding rolled material 41 cut as shown in FIG.
1a and the succeeding rolled material 42 cut as shown in FIG.
However, when they are butted against each other for welding, the end face 42a has an irregular gap between them as shown in FIG. It is not always easy to weld the rolled materials 41 and 42 in such a state, and there are some difficulties in terms of welding reliability, and effective improvement measures have been demanded.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a rear end portion of a preceding rolled material and a front end portion of a subsequent rolled material are cut into a shape which can be welded to each other so as to connect the preceding rolled material and the subsequent rolled material. Material cutting device comprising a pair of upper and lower drums provided with a knife for cutting the rear end of the preceding rolled material.
Location and a next strip cutting device after consisting also a pair of upper and lower drums with a knife for cutting the tip of the trailing rolled material is provided side by side along the transfer direction of the rolled material, the prior
The rotation directions of the upper and lower drums in the material cutting device are opposite to each other
And attached to those drums
Of the knives are reversed with respect to each other,
The rotation directions of the upper and lower drums in the
Along with the drum attached to those drums
The directions of the hooks are reversed with each other.
The rotation direction of the upper drum and the
Orientation of the knife that is
Direction of rotation of the side drum and attached to that drum
And the direction of the knife is reversed.
Rotation direction of lower drum and mounting on that drum
The direction of the knife that is set is determined by the following material cutting device.
Rotation direction of the lower drum and the
Characterized in that the directions of the knives are opposite to each other .

[0006]

In the apparatus according to the present invention, the rear end of the preceding rolled material and the front end of the succeeding rolled material are cut by different pairs of drum knives, respectively, and the transfer direction of the rolled material and the drum movement at that time are cut. By setting the rotation directions to be opposite to each other, the form of cutting at the end of each rolled material becomes the same, and the cut surface becomes symmetrical.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. 1 and 2 show a state in which the rear end of the preceding rolled material 41 is cut by the apparatus according to the embodiment, and FIGS. 3 and 4 show a state in which the front end of the subsequent rolled material 42 is cut by the same apparatus. FIG. 5 shows a state in which a new rear end face 41a of the preceding rolled material 41 formed by cutting and a new front end face 42a of the succeeding rolled material 42 abut against each other.

The apparatus of this embodiment has a configuration in which a preceding material cutting device and a following material cutting device are arranged side by side along the direction of transport of the rolled material 4. That is, in FIGS. 1 and 3, reference numeral 11 is a housing, and 13A and 13A are preceding materials.
A pair of upstream drums constituting the cutting device, 12A
Is a drum chuck 13B, which rotatably holds it.
13B is a downstream pair of doors constituting the trailing material cutting device.
Ram, 12B is a drum chuck that holds it rotatably.
It is. Knives 15A, 15A, 15B, 15B are respectively attached to the drums 13A, 13A, 13B, 13B, and a pair of knives 15A, 15A on the upstream side are attached.
The direction of the pair of knives 15B, 15B on the downstream side is reversed. That is, the knives 15B, 15B attached to the pair of drums 13B, 13B on the downstream side are
The direction of B is exactly the same as that of the conventional one shown in FIG. 6, but the directions of the knives 15A and 15A attached to the pair of drums 13A and 13A on the upstream side are opposite to those. The rotation directions of the pair of upstream drums 13A, 13A and the rotation of the pair of downstream drums 15B, 15B are set to be opposite to each other. In addition,
The interval between the drums is determined by the pressing mechanism 1 according to the thickness of the rolled material 4.
What is adjustable by 6, 16 is the same as the conventional one.

A procedure for cutting the end of the rolled material 4 by the apparatus having the above configuration will be described. First, in order to cut the rear end portion of the preceding rolled material 41, the rear end portion of the preceding rolled material 41 is passed through the drums 13A, 13A, and then returned to the opposite direction (left side in the figure). Cutting is performed by the knives 15A, 15A of 13A, 13A. In this case, the rotation direction of the upper drum 15A is clockwise, and the rotation direction of the lower drum 15A is counterclockwise.

When cutting is performed in this manner, as shown in FIG. 2, a new rear end surface 41a of the preceding rolled material 41 becomes a relatively flat surface, and a front end surface 40a of the chip 40 becomes a convex curved surface. This is the same as the procedure for cutting the rear end of the preceding rolled material 41 by the conventional apparatus shown in FIG. 6 (see FIG. 7) (however, the transport direction of the preceding rolled material 41 is opposite to that in the conventional case). is there).

The preceding rolled material 41 whose rear end has been cut as described above is transported again forward and passed through the present apparatus, and then the leading end of the succeeding rolled material 42 is cut. As shown in FIGS. 3 and 4, the downstream rolled material 42 is transported forward in the rolling direction while the downstream pair of drums 13 is moved.
B, 13B are performed by knives 15B, 15B. The procedure at this time is no different from the procedure for cutting the leading end of the trailing rolled material 42 by the conventional apparatus (see FIG. 8), and a new tip surface of the trailing rolled material 42 formed in this manner is not changed. 42a is a relatively flat surface.

In the above-described procedure, when the rear end of the preceding rolled material 41 is cut, and when the front end of the subsequent rolled material 42 is cut, the transport direction and the rotation direction of the drum are opposite to each other. As is clear from FIGS. 2 and 4, the rear end of the preceding rolled material 41 and the front end of the succeeding rolled material 42 are cut under exactly the same conditions except that the left and right sides are reversed. As a result, as a result, the rear end face 41a of the newly formed preceding rolled material 41 and the front end face 42a of the succeeding rolled material 42
Is symmetrical.

Therefore, as shown in FIG.
When the two new leading end surfaces 42a are brought into contact with the new trailing end surface 41a of the preceding rolled material 41, those end surfaces are left-right symmetric, so that left-right symmetrical gaps are formed vertically. Therefore, the welding of the portion can be performed easily and reliably, and as a result, not only the workability can be improved, but also the reliability of the welding can be improved, and the quality can be improved.

In the above embodiment, two pairs of drums 13 are used.
Although A, 13A, 13B, and 13B are installed in the common housing 11, each pair of drums may be installed in a separate housing, and the housings may be provided side by side along the rolling line. Further, the apparatus according to the present invention can be applied not only to a stationary type, but also to a cutting operation while running in synchronization with the transfer of a rolled material, that is, a cutting operation between runs. It is.

[0015]

As has been described in detail above, the apparatus of the present invention has a structure in which the direction of rotation of the drum and the direction of the knife are mutually different.
Equipped with a leading material cutting device and a succeeding material cutting device
Since the leading end of the preceding rolled material and the leading end of the succeeding rolled material are separately cut by the leading material cutting device and the trailing material cutting device , the ends of each rolled material are the same. It is possible to cut under the conditions, new end faces formed by cutting can be made symmetrical, and as a result, welding of these end faces can be performed easily and reliably The effect is as follows.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a state where a cutting device according to an embodiment of the present invention has cut a rear end of a preceding rolled material.

FIG. 2 is an enlarged view of a main part in the same state.

FIG. 3 is a schematic configuration diagram showing a state where the apparatus cuts a leading end portion of a succeeding rolled material.

FIG. 4 is an enlarged view of a main part in the same state.

FIG. 5 is a view showing a state in which a preceding rolled material and a succeeding rolled material cut by the same device are butted to be welded.

FIG. 6 is a schematic configuration diagram of a conventional cutting device.

FIG. 7 is an enlarged view showing a state where a rear end portion of a preceding rolled material is cut by the apparatus.

FIG. 8 is an enlarged view showing a state in which the leading end of a succeeding rolled material is cut by the same device.

FIG. 9 is a diagram showing a state in which a preceding rolled material and a succeeding rolled material cut by the same device are butted.

[Explanation of symbols]

 13A, 13B Drum 15A, 15B Knife 41 Lead rolled material 42 Trailing rolled material

Claims (1)

(57) [Claims] An apparatus for cutting a rear end portion of a preceding rolled material and a front end portion of a subsequent rolled material into a shape that can be welded to each other so as to connect the preceding rolled material and the following rolled material. A pair of upper and lower with a knife for cutting the rear end of the rolled material
A pair of upper and lower drums each having a leading material cutting device comprising a drum and a knife for cutting the leading end of the succeeding rolled material.
And a following material cutting device formed of a drum is arranged side by side along the transfer direction of the rolled material, and the rotation direction of the upper and lower drums in the preceding material cutting device is
They are inverted and attached to their drums
The directions of the knives being cut are reversed with each other, and the rotation directions of the upper and lower drums in the following material cutting device are
They are inverted and attached to their drums
The directions of the knives being cut are opposite to each other, and the rotation direction of the upper drum in the preceding material cutting device is
The direction of the knife attached to the drum is
The direction of rotation of the upper drum and the
The direction of the knife attached to the drum and the opposite
Is, the rotation direction of the lower drum in the preceding material cutting device
The direction of the knife attached to the drum is
Rotation direction of lower drum and its
The direction of the knife attached to the drum and the opposite
An apparatus for cutting a rolled material.