JPS62252603A - Method for joining sheets - Google Patents

Abstract

PURPOSE:To execute easy and sure joining in the case of joining the rear end of a preceding hot rolled sheet and the front end of a succeeding sheet by driving a shape memory joint in which a shape is preliminarily memorized and heating said joint thereafter to deform the same. CONSTITUTION:The shape memory joint 1 is driven by a moving driving device 10 to the ends of the preceding sheet 2a and the succeeding sheet 2b to join said ends on the front side of a continuous finishing mill 6 of hot rolling. For example, the joint 1 is formed of a shape memory alloy to a split pin shape. Said joint 1 is formed to the strength and length at which the joint can penetrate the superposed parts of the high-temp. sheets 2a, 2b when driven thereto at an ordinary temp. The shape is preliminarily memorized to the joint in such a manner that split two leg parts 3, 3' open to the right and left under heating and that the high temp. sheets 2a, 2b can be fastened and fixed to each other by the leg parts 3, 3' and flange parts. The joint 1 is, therefore, deformed to the preliminarily memorized shape when the joint is heated to a required temp. in a rolling stage. The sheets 2a, 2b are thus surely joined.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a plate joining method that is particularly advantageous in hot joining the rear end of a leading board and the leading end of a trailing board. It is.

[Prior Art] In conventional hot rolling equipment, each slab is rolled and the plate is wound into a coil shape.

With such conventional equipment, production efficiency is said to be low because the rolling speed at the time of plate engagement and tailing is slow, and there is a time lag between the completion of rolling of the preceding material and the start of rolling of the succeeding material. There was a problem.

Therefore, in order to solve the above-mentioned drawbacks of the equipment, a method has been proposed in which the trailing end of the preceding material and the leading end of the succeeding material are overlapped and crimped using a press method, thereby enabling continuous rolling. ing.

[Problems to be Solved by the Invention] However, in the above joining method, since the overlapping portions of the plates are simply crimped together, oxidized surfaces may remain inside and the joining may not be successful. There is a risk that the joints may come apart in the middle due to the weak bonding strength of the joints, and as a result, welding work is required at the joints, making the work complicated.

In view of these circumstances, the present invention has been developed to provide a rear end of the preceding plate,
It is designed to easily, reliably, and with high strength be joined to the tip of the following plate without welding.

[Means for Solving the Problems] The present invention has been made in an attempt to solve the above-mentioned technical problem, and includes a structure in which the ends of the plates to be joined are tightened and fixed to each other by heating. The present invention relates to a plate joining method characterized in that a shape memory joint whose shape is memorized in advance so as to deform is implanted, and then the ends of the plates are joined by deforming the shape memory joint by heating.

[Function] Therefore, in the present invention, a shape memory joint whose shape is memorized in advance is driven between the ends of the plates to be joined, and then the ends of the plates are tightened and fixed by deformation due to heating of the shape memory joint. Since we are trying to join the boards by this,
When joining hot plates such as in hot rolling equipment, the shape memory joint can be deformed by the heat of the hot plate, so plates can be joined by simply driving the shape memory joint. .

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1(A) and 1(B) show an example of a shape memory joint 1 for carrying out the method of the present invention.The joint 1 has a split pin shape made of a shape memory alloy, and is It has the strength and length to penetrate the overlapping portion of the leading plate rear end 2a' and trailing plate tip 2b' of the high temperature plates 2a, 2b by driving into the overlapped part, and the high temperature plates 2a, 2b can be driven into the overlapped portion. When heated, the two broken legs 3.3' open to the left and right, and the high-temperature plates 2a and 2b can be firmly fixed together by the legs 3.3' and the flange 4. The shape is stored in advance.

FIG. 2 shows an example of hot rolling equipment to which the present invention is applied. In the hot rolling equipment, each slab is rough rolled by a rough rolling mill 5 to form a plate 2 of a required thickness. After that, it is formed into a required barrier plate 7 using a continuous finishing rolling mill 6, and further wound into a coil 9 via a shear 8.

On the front side of the continuous finishing rolling mill 6, when joining the trailing end 2a' of the leading plate 2a and the leading end 2b' of the trailing board 2b, the leading board 2a is bitten by the continuous finishing rolling mill 6 and moves. A movable driving device 10 is provided which drives the joint 1 while moving the trailing plate 2b and the shape memory joint 1 at the same speed as the moving speed of the plate 2a. - Fig. 3 shows an example of the above movable driving device 1G, which moves on the rail 12 via the wheels 11 at the same speed as the movement speed of the plates 2a and 2b using the required drive method. A driving block 16 that is moved up and down along a guide member 15 by a driving cylinder 14 is provided on the device main body 13, and the upper end (flange portion ) is provided with a clamping fitting 18 for clamping.

Furthermore, a plate 2a is provided at the bottom of the driving block 16.

The plate 2a supports the overlapping portion of the plate 2b and is driven in.

2b@ A support base 20 is provided which has a space 19 such that the lower end of the shape memory joint 1 passing therethrough does not interfere with the space 19.

Further, at least one of the plates 2a and 2b is supported by a support roller 21 that can be raised and lowered in order to overlap the front and rear ends thereof. In addition, in the illustrated case, since the support stands 20 are provided before and after the moving direction of the main body 13, when the driving is completed and the main body 13 is moved in the opposite direction to return to its original position, the lower end of the joint 1 that has penetrated The support stand 20 will interfere with this. To prevent this, support roller 2
1 may be used to lift the plates 2a and 2b, or the support base 20 may be moved up and down and lowered. If the space 19 is provided, the problem of interference will not occur.

The above-mentioned movable driving device 10 moves the shape memory joint 1 to the plates 2a, 2 while moving together with the movement of the plates 2a, 2b.
When the shape memory joint 1 is driven into the overlapped portion of the shape memory joint 1, it is heated by the high temperature from the plates 2a, 21), and when the required temperature is reached, the shape memory joint 1 is memorized in advance as shown in Fig. 1 (B). The plates 2a, 2b can be firmly joined together by being deformed into a shape such that the plates 2a, 2b can be reliably and continuously supplied to the continuity 1 rolling mill 6.

FIG. 4(8)(B) shows another example of the shape memory joint 1, which has a straight pin shape at room temperature and is heated by being driven into the plates 2a and 2b. The shape is stored in advance so that the upper end 1' and the lower end 1'' are bent into, for example, a mouth shape and the plates 2a and 2b are tightened and fixed.

FIGS. 5(A), 5(B), and 5(C) show still another example of the shape memory joint 1, in which driving legs 22, 22' with a required spacing are connected at the connecting part. At room temperature, the connecting portion 23 has a linear shape as shown in FIG. As shown in FIG. 5 (to), the shape is stored in advance so that it can be bent, and therefore the plates 2a and 2b are joined by the action of reducing the distance. In this case, as shown in FIG. 4(C), the plate 2a
, 2b can be joined by a butting method.

Moreover, FIG. 6^(B) shows yet another example of the shape memory joint 1, which is different from the joints shown in FIG. 5(A'), (B), and (C) in this case by heating Driving leg 22゜22
The shape of the driving legs 22 and 22' is preliminarily memorized so that the driving legs 22 and 22' are bent inward, thereby reducing the distance between the driving legs 22 and 22', thereby joining the plates 2a and 2b.

7(A) and 7(B) show a heating device 24 that heats the joint end surfaces of the plates 2a and 2b by electric high-frequency heating, high-temperature gas jetting, etc. before carrying out the joining method shown in FIG. 6.
After that, the shape memory joint 1 is implanted to perform the joining. According to this method,
The melt adhesion of the joint surfaces by heating and the tightening and fixing by the shape memory joint 1 make it possible to form a very strong joint. Further, the method of preheating the joint surfaces of the plates 2a and 2b can be carried out in any combination with other embodiments.

Note that the present invention is not limited to the above embodiments, and even if the plates 2a and 2b do not have a high temperature, the plate 2a and 2b may be
, 2b or when heating a portion of the shape memory joint, the plates can be joined; the shape of the shape memory joint can be changed in various ways other than those shown; and other modifications within the scope of the vehicle invention. Of course, various changes may be made.

[Effects of the Invention] As described above, according to the plate joining method of the present invention, a shape memory joint whose shape is memorized in advance so as to be changed into a desired shape by heating is inserted between the plates to be joined to perform the joining. Therefore, when joining high-temperature plates or plates that will be heated later, just by driving a shape memory joint, the plates can be naturally tightened and fixed together by the rapid heating deformation, making it easy and fast. An excellent effect can be achieved that enables reliable joining.

[Brief explanation of drawings]

Fig. 1) is an explanatory diagram showing an example of a shape memory joint for implementing the method of the present invention, Fig. 2 is an explanatory diagram showing an example of hot rolling equipment to which the present invention is applied, and Fig. 3 is an explanatory diagram showing an example of hot rolling equipment to which the present invention is applied. An explanatory diagram showing an example of a shape memory joint driving device applied to Fig. 2, and Fig. 4 (
△) (B) is an explanatory diagram showing another example of a shape memory joint, the fifth
Figures (A), (B), and (C) are explanatory diagrams showing still another example of a shape memory joint, Figure 6 (B) is an explanatory diagram showing yet another example of a shape memory joint, and Figure 7 (H )(B) is an explanatory view showing an example in which a means for heating the joint surfaces of the plates is used in addition to the example in FIG. 6a). 1 is a shape memory joint, 1' is an upper end, 1'' is a lower end, 2a, 2b is a high temperature plate, 3.3' is a leg part, 4 is a flange part, 6 is a continuous finishing rolling machine, 10 is a moving driving device, 14 is a driving cylinder, 15 is a guide member, 16 is a driving block, 17 is a gripping cylinder, 18 is a clamp fitting, 20 is a support base, 21
is a support roller, 22.22' is a driving leg, 23 is a connection part,
24 indicates a heating device.

Claims (1)

[Claims] 1) A shape memory joint whose shape is memorized in advance so as to be deformed by heating into a shape that tightens and fixes the plates to each other is inserted between the ends of the plates to be joined, and then the shape memory joint is deformed by heating. A board joining method characterized by joining board ends to each other.