JPS61176482A - Joining method of metallic plate - Google Patents

Abstract

PURPOSE:To join strongly without descaling due to the new surface caused by shearing coming in contact each other and being pressure-welded by overlapping two pieces of metallic plates and by shearing by the stroke of less than the plate thickness of the thinner part and further by applying compression force at right angles with the sheared face. CONSTITUTION:The overlapped part of both rolled stocks 1, 2 is located between the upper and lower shearing edges 3, 4 and sheared with the action of shearing forces A, B by the stroke in such degree as not being completely cut by the shearing edges 3, 4. Namely it is sheared by the stroke of less than the plate thickness of the thinner part. Then new surfaces 1a, 2a are caused on the sheared face and these new faces 1a, 2a come into contact each other without touching the air and are strongly joined. Therefore there is no necessity for descaling. In such case, by applying as per the arrow mark the force in the right angles direction against the sheared face on the rolled stocks 1, 2 so as to pressure-weld the sheared face each other, both rolled stocks 1, 2 are joined more strongly. Thereafter both rolled stocks 1, 2 are bit into a rolling mill as they are and rolled in succession.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention relates to a method of joining two metal plates, for example in the field of hot rolling, where the trailing end of a leading rolled material and the leading end of a trailing rolled material are bonded together. This invention relates to a method of joining parts to make them continuous.

[Prior Art] As a method for joining hot-rolled materials, a method is known in which the rear end of a preceding rolled material and the leading end of a subsequent rolled material are pressed against each other and joined together.

[Problems to be Solved by the Invention] However, in this case, since oxide scale is likely to occur on the surface of the hot rolled material, there is a problem that the required bonding strength is difficult to obtain.

An object of the present invention is to provide a method for joining metal plates that can prevent the generation of scale and achieve strong joining.

[Means for Solving the Problems] The metal plate joining method of the present invention involves overlapping two metal plates, positioning the overlapping portion between upper and lower shear blades, and using these shear blades to It is characterized by shearing only a stroke within the thickness of the thinner of the two metal plates. Further, the second invention is characterized in that after the above operation is completed, a force is applied to the metal plates in a direction perpendicular to the sheared surfaces so that the sheared surfaces of both metal plates are brought into pressure contact with each other. There is.

[Operation] In the method of the present invention, when the shearing blade is moved by a stroke within the thickness of the thinner plate, the metal plate is sheared by the amount corresponding to the stroke, but is not divided. Moreover, a new surface is generated on the sheared surface.

In this case, since both metal plates are overlapped and sheared, some of the new surfaces of each metal plate face each other, and as soon as they are generated, they come into contact without being exposed to air, and the effects of friction and other forces during shearing are also added. The two are strongly bonded. Further, at that time, a stronger bond can be achieved by applying a compressive force to both newly formed surfaces.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 3.

This example is an example of joining hot rolled materials,
In the figure, 1 is a leading rolled material, and 2 is a trailing rolled material, both of which are on the hot rolling line.

In this joining method, first, as shown in Fig. 1, circularly rolled materials are used.
, 2 to be joined, and position the overlapped portion between the upper and lower shearing blades 3.4, and then move the ends of the arrows A and 2 in FIG. Shear it by acting like H. That is, only the stroke within the thickness of the thinner plate is sheared. FIG. 2 shows the state after the operation.

Then, new surfaces 1a and 2a are generated on the sheared surface, and these new surfaces 1a and 2a come into contact with each other and are strongly bonded without coming into contact with air. Therefore, there is no need to remove scale. At that time, as shown in Fig. 3, a force is applied to the rolled material 1.2 in the direction perpendicular to the sheared surfaces in the direction of the arrow so that the sheared surfaces come into pressure contact with each other, thereby making it more solid. The circularly rolled materials 112 are joined. 5.6 is a holding jig. Thereafter, continuous rolling can be carried out by inserting these rolled materials 1.2 into a rolling mill as they are.

In the above embodiments, the case where hot-rolled materials are joined is taken as an example, but the present invention can also be applied to the case where cold-rolled materials are joined.

[Effects of the Invention] According to the present invention, by stacking two metal plates and shearing the stroke within the thickness of the thinner one, it is possible to generate a new surface on the sheared surface without being separated, and These new surfaces can be brought into contact with each other without being exposed to air.・For this reason, both new surfaces are strongly bonded to each other due to the effects of friction during shearing, and both metal plates are joined.

Therefore, metal plates can be firmly joined without removing scale. Furthermore, by applying a compressive force to the sheared surface, an extremely strong bond can be achieved.

[Brief explanation of drawings]

1 to 3 are side views sequentially showing the steps of an embodiment of the present invention. l... Leading rolled material, 2... Following rolling material, 3
......Upper first blade, 4...Lower shearing blade.

Claims (2)

[Claims] (1) Overlap two metal plates, position the overlapping part between the upper and lower shear blades, and use these shear blades to
A method for joining metal plates, characterized in that shearing is performed by a stroke within the thickness of the thinner of the two metal plates. (2) Overlap two metal plates, position the overlapping part between the upper and lower shear blades, and use these shear blades to
Shearing is performed by a stroke within the thickness of the thinner of the two metal plates, and a force is applied to the metal plate in a direction perpendicular to the shear plane so that the shear planes of both metal plates come into pressure contact with each other. A method for joining metal plates, characterized by: