JP3428322B2 - Metal plate joining method and apparatus - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining a plurality of metal sheets, and more particularly to a method for hot-rolling a hot-rolled material in a short time when rolling the hot-rolled material with a rough rolling mill group and a finishing rolling mill group. The present invention relates to a method for joining hot-rolled materials that enables joining and continuous rolling.

[0002]

2. Description of the Related Art There is an extremely strong demand for continuous finish rolling in hot rolling equipment for metal sheets to improve productivity, quality and automation of operations. The key technology is the joining of hot rolled material (hereinafter referred to as bar material). In the case of cold-rolled material, the thickness of rolled material is thin, so continuous rolling is possible because it can be joined with sufficient strength by welding etc. Since it is thick and the rolling must be finished before the temperature of the rolled material decreases, the rolling speed (feeding speed of the rolled material) is higher than that of the cold rolling mill, and joining by welding is difficult.

Conventionally, many methods for joining bar materials have been proposed, such as an electric heating method, a gas heating method, a fusing method, and a friction method, but all of them have a drawback that joining takes too much time. There is. Since the rolling speed of the hot rolled material is high as described above, when the joining machine is of a traveling type, unless the joining of the bar materials is completed in a short time, the traveling distance of the joining machine becomes long and it is difficult to realize. Further, when the joining machine is a fixed type, the thickness of the bar material is usually as thick as 20 to 50 mm, so a huge looper for accumulating the bar material is required.
In the case of the conventional bar material bonding, 20 to 30 seconds is required at the shortest including preparation before bonding, sag by pressing, removal of burrs and the like. The techniques described in JP-A-4-187386 and JP-A-6-39405 are known as techniques for reducing the joining time of hot-rolled materials.

In these techniques, the end portions of the preceding rolled material and the trailing rolled material are sheared and simultaneously slid, and the rolled materials are butted against each other as necessary to oxidize the surface of the hot rolled material. The new surfaces are brought into direct contact with each other without interposing a film, and a strong metal bond can be obtained.

A method of completing the joining in a short time is not the joining of the hot rolled material, but there is, for example, the pushback blanking method described on page 455 of the proceedings of the plastic working spring lecture in H6. This is a method in which the materials to be joined are superposed, constrained by a die and a stripper, and pushed in by a punch to join the materials, and the fractured surfaces due to shearing are instantly joined together, so that high joining strength can be obtained.

[0006]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention
As a result of applying the technology described in JP-A No. 4-187386 and JP-A No. 6-39405 to hot rolled materials of various thicknesses and materials, when the rolled material is carbon steel or stainless steel and is thick, the joint strength is high. Was found to be insufficient and may fracture from the joint during rolling. The breakage during rolling damages the surface of the rolling roll and requires stopping all the lines, which is very inefficient.

The pushback blanking method is
This is an application of punching using a punch and a die, and cannot be applied to the joining of a metal plate material targeted by the present invention, particularly a hot-rolled material having a thickness of several tens of mm.

It is an object of the present invention to provide a method for joining metal sheets, particularly hot-rolled materials, which is capable of improving the above-mentioned drawbacks of the prior art and obtaining sufficient joining strength in a short time.

[0009]

According to a first aspect of the present invention for achieving the above object, in a joining apparatus for joining plate members made of a plurality of metals, the portions to be joined of the metal plates are overlapped with each other. A mechanism, at least two support bases for supporting the overlapping portion from one side of the metal plate, and a shearing blade at a position facing the supporting base with the overlapping portion interposed therebetween. And the support base is provided with a mechanism that relatively moves so as to sandwich the overlapping portion therebetween.

The mechanism for superposing the portions to be joined together is designed to move the metal plates in the vicinity of the movable shearing blades by raising and lowering the platform for supporting one of the metal sheets to be joined from below by the power of hydraulic pressure, air pressure, motor or the like. There is a mechanism of overlapping, a height of a roller base for transporting metal plates is different in the vicinity of the joining device, and when the metal plates to be joined approach each other, the metal plates inevitably overlap with each other. Whatever method is used, it suffices that the metal plates to be joined already overlap in the vicinity of the movable shear blade.

Supporting the overlapping portion from one side of the metal plate is usually supported from the direction of gravity applied to the plate material, that is, from below, but if the plate material is a magnetic body, it can also be supported from above by an electromagnet or the like. However, it is also possible to stand the metal plate vertically to the ground and support it from the side. The support base may be a cubic member, or any other material such as a triangular prism or a cylinder as long as its position and shape do not change even when the weight of the metal plate and the movable shear blade are pushed in. May be

According to the above construction, it becomes possible to join metal plates having sufficient strength in a short time. In particular, it is possible to provide a joining device suitable for joining a rolled material (referred to as a sheet bar) located between a rough rolling mill and a finish rolling mill having different rolling speeds.

In the first aspect of the present invention, it is preferable that an extension line of the relative movement locus of the shear blade intersects with one of the support bases. "The extension line of the motion locus intersects with one of the support bases" means that, for example, in the case of a movable shear blade that moves linearly,
It means that if you move the movable shear blade as it is in the direction of pushing it into the metal plate to be joined, it will hit the support base.
In other words, a part of the metal plate to be joined is sandwiched between the movable shear blade and the support table and compressed. If the movable shearing blade moves in a curved path, arrange it so that the line that extends the curve intersects the support base. With this arrangement, since the metal plates to be joined are partially compressed and stretched in the direction perpendicular to the compression direction, the new surfaces are pressed against each other, and the joint strength can be improved. it can.

In the first aspect of the invention, the shear blade has a lower end portion on the side where the extension line of the operation locus intersects the support base closer to the overlapping portion than a lower end portion on the side closer to another support base.
That is, it is preferable that the distance is close to the overlapping portion . For example, when the cross-sectional shape of the shearing blade as viewed from the side in the longitudinal direction of the metal plates to be joined is substantially fan-shaped (Fig. 3)
Is.

With such a structure, the bending angle of the metal plate to be joined becomes small, and the joining portion after joining can be easily flattened. Also, the driving force of the movable shear blade can be small.

In the first invention, the shearing blade linearly moves toward the support base, and the support base and the shearing blade overlap each other when viewed from a direction parallel to the operation straight line of the shearing blade. It is preferable that there is a part. this is,
The case where the extension line of the movement locus intersects with one of the support bases and the case where the movable shear blade linearly moves is assumed. Since the movable shear blade moves linearly, there is an effect that the structure of the joining device is simplified.

In the above invention, the overlap portion is 0.1 mm or more at the maximum in the longitudinal direction of the metal plate,
It is preferably 0 mm or less or 20% or less of the plate thickness to be joined.

[0018]

In the first invention, after the operation stroke of the shearing blade comes into contact with the upper surface of the metal plate, it is 50% or more, that is, 1/2 or more of the thickness of the upper surface of the superposed metal plates.
In, exceed the following words of the lower surface of the plate thickness of 1/2 thickness 150%
Preferably not .

In the present invention, the metal plate is deformed by operating the shear blade or the support base, and
Join without cutting . Relative motion stroke of shear blade
Is 50% or more of the plate thickness of the upper surface, that is, a thickness of 1/2 or more , 15
It is preferably 0% or less, that is, not more than 1/2 of the plate thickness of the lower surface . This configuration bonding strength is large, it can be provided already no joining machine a small energy and required for bonding.

In the first invention, the joining device may include a mechanism capable of moving on the rail. In the rolling material joining machine installed between the rough rolling mill and the finishing rolling mill, the rolling material is configured by completing the joining while moving the joining machine according to the feeding speed of the hot rolling material. The so-called looper, which adjusts the feed rate by bending, becomes unnecessary. That is, the structure of the continuous rolling facility is simplified.

In the first aspect of the invention, the supporting bases may have a concave shape in which they are connected to each other. This structure simplifies the structure of the device and reduces the device cost.

In the first invention, the metal plate is preferably a hot rolled material. It is preferable that the temperature of the metal plates to be joined is higher to some extent because the metal plates can be easily deformed, the energy required for joining can be reduced, and the joining strength can be improved. In the case of a cold rolled material, it is necessary to heat before joining, but in the case of joining a hot rolled material, a heating mechanism is unnecessary or can be simplified.

In the first aspect of the invention, the cross-sectional shape of the blade to be pushed in as seen from the lateral side in the longitudinal direction of the plate of the shear blade is a trapezoidal polygonal shape, and the contact area with the plate of the blade changes continuously. The angle at which the blade first contacts the plate in the longitudinal direction with respect to the plate may be approximately 0 degrees.

This portion may be a straight line or a circular arc. In the case of an arc shape, the angle of the tangent line may be 0 degree with the plate. Further, the angle in the direction perpendicular to the plate of the part that first contacts the plate of the blade affects the life of the blade during operation, and is therefore preferably 90 degrees or more. Further, it is desirable that the rear end of the shearing blade bites into the overlapping portion of the plates when it is finally pushed. By doing so, the portion corresponding to the rear end of the shearing blade of the overlapping portion of the lower plate bites into the concave portion of the support base, and a large pressing force can be generated.

The shape of the concave portion of the supporting base has a great influence on the bonding strength. The shape of the support table facing the portion of the shearing blade that comes into contact with the sheet bar first may be a shape along the movement locus of the shearing blade, but a shape crossing the extension line of the movement locus is more preferable. For example, when the relative motion locus of the shear blade is a straight line locus perpendicular to the seat bar, the slant blade is inclined not in the vertical direction but in the motion direction of the shear blade. It is preferable that the edge angle of the upper portion of the support table that is in contact with the plate material is smaller than 90 degrees, and that the deeper the recesses, the larger the longitudinal interval. By doing this, the recessed part completely self-locks and supports the deformed part of the lower part of the overlapped material when the shearing blade is pressed into the material, realizing a larger pressing pressure load during deformation joining it can. Further, it is desirable that the support table corresponding to the portion of the shearing blade which comes into contact with the material at the end has a shape in which the lower plate bites at the end of the pushing of the shearing blade. Usually, the shape may follow the movement locus of the shear blade, but the shape that wraps with the shear blade is preferable.

Next, the operating conditions of the shear blade will be described. In this joining method, the pushing speed of the shear blade into the material has a great influence on the joining strength. When the speed is low, the scale is less likely to be divided, and the scale is deformed together with the base material and is likely to remain in a wide range in the bonded surface after bonding, and it is difficult to secure the cleanliness of the bonded surface. 5 mm
/ S or more is preferable, and 50 mm / s or more is more preferable.

The joining surface in the joining method of the present invention is a part of the lap surface at the start of joining, that is, immediately before the shearing blade is pushed into the material, so that it is in the longitudinal direction of the sheet bar. Is deformed, and finally becomes an oblique direction with an angle from the plate thickness direction of the bar.
This angle changes depending on the joining conditions such as the amount of lap between the shearing blade and the support and the stroke of pushing into the plate, but it affects the rolling process after joining. The larger the angle from the plate thickness direction, that is, the more inclined the joint surface, the more the joint fracture during rolling can be prevented, and stable operation can be obtained.

One of the methods for ensuring the strength at the time of inserting the joint by rolling is to increase the joint area. For this purpose, the cross-sectional shape of the shear blade and the seat bar of the support base viewed from the up-down direction, that is, the shape of the seat bar in the plate width direction may be formed into a corrugated shape. For example, the corrugated irregularities are angled at
When it is formed in a triangular shape of degree, it is 1.
4-fold, 2-fold compared with the case of the straight line in the case of forming the corner of 60 ° triangular, 1.57 times compared with the case of the straight line in the case of forming a semi-circular shape, when formed in rectangular shape In addition, it is possible to obtain a joint area increased by the total length of the unevenness. In this case, in order to shorten the joint portion in the longitudinal direction of the sheet bar, the depth of the unevenness may be reduced and the number thereof may be increased.

Since the sheet bar usually has a plate width of 1000 mm or more, when rolled, the elongation at the central part of the plate width becomes large especially at the rear end. Therefore, the joint portion is easily cracked when the end portion of the plate width is rolled. In order to prevent this, it is desirable that the joint surfaces at both ends of the plate width form a joint surface projecting in the traveling direction of the sheet bar from the joint surface at the center of the plate width. That is, it is preferable that the shape of the shearing blade and the support base when viewed from above or below in the longitudinal direction of the plate is V-shaped with both ends protruding in the traveling direction of the sheet bar. As a concrete shape, an inverted triangle, a semicircle, an ellipse, or the like may be appropriately selected with respect to the traveling direction. If the above-mentioned corrugated shape is superimposed on this V-shaped shape, the effect of increasing the joint area is also increased, and more reliable and stable operation can be obtained.

In the joining of the hot rolled materials, the purpose is to join and join the front and rear ends of the bar, and to smoothly carry out the finish rolling in the post process. The overlapping portion (hereinafter referred to as crop) needs to be eliminated. Ease of removal depends on the shape of the shear blade and the support. Also, the joining conditions such as the lap amount and the pushing stroke to the plate, particularly the pushing stroke amount have a great influence.

As described above, the joining surface in this joining method has a shape having an angle in the plate thickness direction. Although the crop is cut, the connecting portion between the crop and the joint remains due to the amount of pushing stroke. As a method of dividing the crop, it is possible to momentarily push the crop in the length or width direction of the plate, pry it with something like a claw, or select an appropriate method. It is preferable to control the joining conditions so that the thickness is 5 mm or less in the plate thickness direction. From this point of view, the pushing stroke is at least not less than the plate thickness, preferably 1.
It is better to double or more. If it is 1.2 times or more, the joint residual strength becomes small, and at the same time, the plastic flow deformation rate of the joint becomes large, so that the joint strength also increases. It is also preferable to descale only the joining portion and leave the scale of the overlapping portion other than the joining portion attached, because the crop breaking force becomes small. On the contrary, in order to improve the crop splitting property, a method of applying an inert material such as ceramic powder in advance on the overlapping surfaces other than the bonding portion before bonding may be adopted. In this case, a step of removing the applied material from the surface of the joining bar after the crop division may be necessary.

The crop division requires special measures when joining metal plates having different plate thicknesses and joining materials having different plate widths.
When joining different plate thicknesses, it is advisable to set the push stroke according to the push stroke on the thick side. By doing so, the thin plate crop has almost no connection remaining and is cut at the time of joining. It is efficient if there is a control system that can detect the thickness of the plates to be joined and automatically adjust the stroke. Also,
In the case of joining metal plates of different widths, a method of cutting the widths with a shear in the process up to joining after stacking, a shearing blade,
It is necessary to divide the support base in the width direction and to apply a pushing stroke for the plate thickness in advance in the operating direction for the portion that corresponds to the width portion.

As described above, according to the joining method of the present invention, the scale on the surface of the metal plate is divided to form a new surface and the joining is performed while ensuring the cleanliness. Reduce the joint area of. In order to increase the bonding strength, improve the probability of successful bonding, and ensure reliable operability, it is desirable to descale the surfaces of the metal plates before stacking. As a descaling method, there are various means such as mechanical cutting or grinding with a rotary cutter or a broach, injection of high-pressure water, injection of an acetylene gas burner, and the like. It is preferable to select and use an efficient means in a short time. Here, descaling does not necessarily need to cover the entire overlapping surface. As described above, it is preferable that the descaling is performed only in the local region that is deformed and becomes the joint surface. As a concrete numerical value, it is most preferable to limit the descaling to a region of 10 to 30 mm in the longitudinal direction.

The present joining method is basically solid-phase joining and utilizes plastic flow deformation. Temperature, cleanliness and pressure are important for bonding. As described above, the hot rolled material has a temperature of 800 to 1000 ° C., but it is preferable to include a heating mechanism or a temperature adjusting mechanism in order to obtain stable bonding strength. The joint strength can be improved by raising the temperature. In addition, if the temperature is adjusted, it is possible to always join under a constant condition, and the reliability of the joining machine is improved.

According to a second aspect of the present invention, in a hot rolling facility, an intermediate coiler for winding a metal plate, a leveler for flattening the metal plate coming out of the intermediate coiler,
A joining machine for superposing and joining the metal plates coming out of the leveler, a cropping device for dividing the crops produced during the joining, and a finishing mill for smoothing the surface of the metal plates,
A hot rolling facility is provided, wherein the joining machine is the joining apparatus according to claim 1. By applying the first invention of the present invention to the joining machine of the hot rolling equipment having the above-mentioned configuration, the time required for joining is short, so that the total length of the rolling equipment can be shortened. You can omit the looper. Since sufficient joining strength can be obtained, the joining portion is not broken during rolling and the surface of the rolling roll is not damaged. The effect such as can be obtained.

According to the third aspect of the present invention, after at least two metal plates are superposed, a shearing force is applied to at least a part of the superposed portions of the metal plates in the plate thickness direction of the metal plates. In addition, there is provided a metal plate joining method, characterized in that the metal plates are joined to the sheared surfaces of the overlapping portion while generating a pressing force that pushes the sheared surfaces together. As a method of extending the metal plates to be joined in the longitudinal direction, simply apply tensile stress in the longitudinal direction, but if the points of action to which the stress is applied are too far apart, a large deformation rate cannot be obtained. It is preferable to shorten the distance between the points and increase the deformation rate.
The longitudinal direction is used as a word for the thickness direction.
That is, it is not necessary to extend in parallel to the longitudinal direction,
The extension direction may be offset in the thickness direction (the vertical direction of the metal plates to be joined). A strong joint can be achieved by simultaneously extending the metal sheets to be joined and pressing the extended portions in a direction substantially perpendicular to the extending direction . The greater the deformation rate, the higher the cleanliness of the joint surface and the greater the joint strength. The magnitude of the deformation rate may be controlled by the absolute value of the required bonding strength. In joining hot rolled materials, the cleanliness of the joining surface is important. By stretching the metal plate to be bonded so as to have a very large deformation rate as in the present invention, the oxide formed on the surface of the hot-rolled material is divided and peeled off, and a clean new surface appears. A strong metallurgical bond can be obtained by pressing the new surfaces so as to sandwich them. The generated clean surface is also covered with the oxide film in a short time in the atmosphere.Therefore, by stretching the metal plate and at the same time applying a pressing force to sandwich it, the generated new surface does not touch the atmosphere. Is most desirable. There are many variations in a specific joining method depending on how to extend the metal to be joined and how to apply a force to push the stretched portion so as to sandwich the stretched portion. The following are variations of the present invention.

After the two metal plates are superposed, the thickness of the metal plates is adjusted from the vertical direction of the superposed parts of the metal plates while restraining the metal plates of the superposed parts so as not to move in the longitudinal direction of the metal plates. A method in which pressure is applied to all of the metal plates in the overlapped parts, which are almost parallel to the direction, by simultaneously applying pressure.

In this case, a part of the overlapped metal plates to which the sandwiching pressure is applied generates a force that moves in the longitudinal direction of the metal plates in an attempt to extend. On the other hand, since the metal plate is constrained so as not to move in the longitudinal direction, a pressure parallel to the longitudinal direction of the metal plate is generated. The generated pressure that is parallel to the longitudinal direction of the metal plate serves as a force for pressing the stretched portion so as to sandwich the extended portion according to the principle of the present invention. That is, it is possible to simultaneously extend the metal plates to be joined by one operation of applying pressure to sandwich the overlapped portions of the metal plates and apply pressure to sandwich the extended portions. As a method of applying "pressure between the vertical direction of the overlapping portions of the metal plates and a part of the metal plates in the overlapped portions of the metal plates in a direction substantially parallel to the thickness direction", it is possible to use an object such as a facing press machine. However, in this case, since the degree of extension of the metal plate cannot be increased so much, it is preferable to alternately make the cutting blades face each other and make the cutting blades approach each other like scissors. Imagine this when you cut a very elastic rubber sheet with scissors. Even if the cutting blades of the scissors try to cut the rubber, the rubber is so elastic that it just stretches and does not cut well. Similarly, when a part of the overlapping portions of the metal plates is pressed from above and below by the alternating shearing blades, the metal plates undergo plastic flow and a large deformation rate is caused. What shape of shear blade is used to sandwich and press the overlapping part of the metal plate,
It is adjusted according to the amount of pressure applied and the required joint strength. The simplest means for restraining the metal plate from moving in the longitudinal direction is to use a clamp to mechanically restrain it by frictional force. However, if restrained, the effect of the present invention can be obtained. It is also possible to use electromagnetic force, for example.

As a general example of the above construction, "the restraining means is at least two pairs of clamps for sandwiching the metal plate from above and below, and the sandwiching pressure applying means is a pressure equal to or higher than the yield stress of the metal plate. It is a pair of shearing blades that face each other with the metal plate added.

One of the pair of shear blades is a fixed blade and the other is a movable blade, and one of the two pairs of clamps facing the movable blade is also used as the fixed blade. Becomes simple.

In the above structure, the largest factor that determines the absolute value of the bonding strength is the degree of extension of the metal plate. That is, the greater the stroke of the shear blade, the greater the degree of extension. When joining ferrous materials,
In order to obtain a generally required bonding strength, it is preferable to have a stroke of 50% or more of the plate thickness of the metal plate after contacting the upper surface of the metal plate.

Further, in order to improve the bonding strength,
It is preferable that a part of extension lines of the motion loci of the pair of shear blades overlap each other. The overlap means, for example, that there is a portion that overlaps a part of the lower shear blade when viewed from directly above the upper shear blade. With this configuration,
The pressing force applied to the joint surface when the metal plate is extended becomes large, and as a result, the joint strength becomes large. When joining iron-based materials, it is desirable that the overlap portion is 0.1 mm or more at the maximum with respect to the longitudinal direction of the metal plates to be joined in order to obtain generally required joining strength. However, if it is larger than 10 mm, there is a high possibility that the metal plate is rolled and cracks occur at the end portions of the metal plate. The above numerical values serve as a reference for determining the size of the overlapping portion, and the most preferable size of the overlapping portion may be experimentally determined based on this. Although it is called a shearing blade, it is not necessarily a blade and the expression of a pressing jig may be used.

Also in the joining device, one of the pair of pressure jigs is fixed and the other is movable, and one of the clamps facing the movable pressure jig of the two pairs of clamps is used. One can also be used as the fixed blade.

In the above structure, even if the movable pressing jig has a rectangular parallelepiped shape, there is no problem from the viewpoint of joining. However, when considering the flattening of the joined part after joining, the shape of the pressing jig is such that the height of the portion near the joined part of the upper joined metal plate is the lowest, and the joining of the upper joined metal plate is The part farther than the part should be higher. That is, the shape of the pressing jig viewed from the lateral direction is preferably a fan shape, a trapezoidal shape, or the like, and the sides connecting the above two corners are preferably smooth curves.

The overlapped portion of the metal plates is not a stack of metal plates to be simply joined, but two metal plates are butted and a third metal plate is placed at the butted part. You may comprise. Although this method makes the joining process more complicated than the above, it has advantages that the flattening step after joining can be omitted, and the amount of scrap material (crops) generated during joining is reduced.

As a variation of the joining device, the clamps arranged above and below the metal plate are linked so that the two pairs of clamps are also used as the pair of pressing jigs, and the two pairs of clamps are parallel to each other. It can also be arranged to move to. The basic configuration of the present invention is composed of two jigs and a pair of shear blades, for a total of six jigs, but each jig can have the same function. In this case, the effect of the present invention can be obtained with a total of four jigs. The feature is that the clamps arranged above and below are linked to each other, and the upper and lower clamps are operated simultaneously and in parallel at the time of joining, whereby the metal to be joined can be extended, sandwiched and pressed. However, since a large stress is applied to the link mechanism, it is necessary to devise a link rod of sufficient strength and the pivot part that connects each clamp and each clamp, so it is suitable for the metal to be joined such as aluminum and copper with low yield stress. It is believed that

The above joining apparatus is applied to a hot rolling facility, an intermediate coiler for winding a metal sheet, a leveler for flattening the metal sheet coming out of the intermediate coiler, and a metal sheet coming out of the leveler are superposed and joined. It is most desirable to use it as a hot-rolling facility that consists of a joining machine, a cropping device that divides the crops generated during joining, and a finishing mill that smoothes the surface of the metal sheet.

More specifically, the present invention will be described in more detail. The preceding bar material and the following bar material are superposed on the line of the hot rolling equipment, and the shearing blade is subjected to a stress so that a part of the superposed part is sufficiently plastically flow deformed. Set the lap amount of to a specific value,
By arranging the upper and lower shear blades and pressing at least one of the upper or lower shear blades from the top to the bottom or from the bottom to the top in the plate thickness direction, the two bar members are plastically flow-deformed and the upper bar member and the lower bar member are The bar material surface is pressure bonded. The arrangement of the shearing blades shown in FIG. 3 shows an example in which the upper shearing blade is pushed. Here, if the pushing depth (D) of the shear blade is set to be equal to or more than the plate thickness, it is possible to separate the residual material portion that does not contribute to the crimping in the deformation process (cropping division), and equipment for crop division is not necessarily introduced. do not have to. The bonding atmosphere may be the air or a non-oxidizing atmosphere such as a vacuum. Considering the bonding mechanism, it is clear that better bonding results can be obtained if the present invention can be carried out in a non-oxidizing atmosphere.

The key to the practical use of the joining of the sheet bar materials is the ability to join in a short time, and attention should be paid to the fact that the joining strength should be such that it does not break in the next rolling step. The present invention is realized by omitting unnecessary steps. That is, as described above, the present invention has upper and lower shear blades having a lap set such that the leading bar material and the trailing bar material are superposed and the superposed portion is pushed by the shearing blade to sufficiently cause plastic flow deformation. Placed in between, further clamped to constrain the metal plate, at least one of the upper or lower shear blades is moved in the plate thickness direction from top to bottom or from bottom to top to deform at least two bar members, Further, the upper bar material and the lower bar material surface are pressure-bonded to each other by pressure bonding. Whether or not they are joined here depends on whether or not sufficient plastic flow deformation is applied to the metal plates and whether or not the pressing force required for adhesion is applied. In other words, when plastic flow deformation occurs, the oxide film on the surface of the bar material cannot withstand the deformation and separates and separates from the metal plate surface, which promotes cleaning of the joint surface and is pressed while cleaning. Therefore, it is firmly joined. Further, when the surfaces of the bar materials are slid in the deformation process, the activation of the joint surface is further promoted and the joint strength is improved. Normally, it has been confirmed that the indentation speed of the shearing blade is about 1 mm / s even in the air, and that bonding that can withstand rolling can be achieved, but when the bar material (mild steel) temperature is 800 ° C, the indentation speed is When it is deformed at a high speed of 500 mm / s or more, frictional heat is generated to the extent that the surfaces of both bar materials become molten or semi-molten due to the above-mentioned sliding action, and the dispersion of the oxide film on the surface is promoted. Performance is further improved. Higher pressing speed promotes activation of the joint surface even if the joint surface does not melt, and is very effective for improving joint strength.

In order to obtain a joint that can withstand rolling, it is necessary to exert sufficient pressing force during plastic flow deformation and the joining process to achieve close contact. As a result of various experiments with the joining method of FIG. 18, the inventors set the position of the lower shear blade inside the moving region of the upper shear blade as shown in FIG. According to the above, it was discovered that a pressing force is generated between the joint surfaces of the bar materials, and the adhesion is further promoted. That pressing force is generated with the plastic flow deformation by adjusting the position of the upper and lower shear blade, junction will have a bonding strength to withstand rolling.

The shape of the shearing blade is important in order to generate a larger pressing force in the process of pushing in the shearing blade.
For example, in the shape shown in FIG. 22, if the radius of the tip is R240 mm, a large pressing force can be generated. On the other hand, when the tip shape is 12 degrees as in the case of FIG. 15, the pressing force is smaller than that of the shape shown in FIG. The pressing force needs to be changed depending on the material of the metal plate to be joined, but the pressing force can be changed by changing the shape of the shear blade in this way. Furthermore, the shape of the shear blade in the plate width direction is also important. As shown in FIG. 16, the straight shape allows joining over the entire width, but requires a large pushing force. Experience shows that if the edge portions of the plates are strongly joined, they can withstand rolling, so they need not be joined over the entire width.

The present invention was made by observing the bonding process in detail as described above.

According to the present invention, since the front end and the rear end of the bar material can be joined, the bar material can be made continuous. Moreover, since it is a very simple method that does not require new heating energy, it is also a method with excellent maintainability of equipment. Further, since the present joining method is basically solid phase diffusion joining, burrs and the like do not occur at the joining portion, so the joining time is basically dependent on the magnitude of the pushing speed. Eg 1
It can be understood that the present invention is a method capable of short-time bonding, considering a speed of 00 mm / s or the like. Furthermore, it has been confirmed that a strong joining can be achieved by setting the indentation depth to 0.7 t or more, which is the thickness of the bar material. However, in order to perform the crop division of the remaining material at the same time as the joining, the indentation depth is It is better to make it thicker or more. In this case, the equipment for dividing the crop is not necessarily required. Therefore, the present invention is an optimum method as a joining method for continuous bar materials.

[0055]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 shows the principle of the present invention.
This figure is a view of the plate material viewed from the lateral direction. The ends of the two plates to be joined are overlapped. Clamp to fix the overlapping parts of the plate material from above and below. afterwards,
Lower the shear blade from above. The extension region of the movement locus of the shear blade and the lower clamp (which may also be referred to as the lower shear blade) have a lap portion indicated by hatching.
In the present invention, this is referred to as a sandwiching and pressing portion. This part is pressed from the up and down direction, but since the metal plate to be joined located between the clamps is constrained, there is only a lateral escape area for the pressure, and the pressure increases as the shearing blade descends. . By this pressure, the metal of the pressed portion is pushed out in the longitudinal direction of the metal plate. As a result, the metal of the pressing portion undergoes plastic deformation flow. In this case, the pressure of the pressing portion causes a large plastic deformation of the metal plate without separating it. The plastic deformation rate at this time is stroke / lap × 1
It depends on the lapping amount of the shear blade, but if the lapping amount is 2 mm, the plate thickness of 20 mm is 20 mm or more / 2 mm x 1
00 causes a portion of 1000% or more (for example, near the first contact point between the upper shearing blade and the upper metal plate). It is difficult to obtain such a high deformation rate by ordinary processing, and it is possible only by the sandwiching pressing of the present invention.
Lower the shear blade until the upper and lower surfaces of the upper and lower plates match, and then stop. Even at this stage, cut scraps and plate materials to be joined are not separated. In the present invention,
In this way, by firmly pressing the plastically deformed portions of the upper and lower metal plate members together, a strong joint can be obtained. It is considered that this is because the surface of the plastically deforming part is very active, and a strong pressing force (in this case, the stress parallel to the longitudinal direction of the metal plate material) provides a strong metal bond. .

On the other hand, in the conventional method, since the main purpose is to shear the metal plate, there is no lap portion as in the present invention. This is the same arrangement of shear blades as a shear for shearing a metal plate or the like. In this case, since there is no portion sandwiched by the metal plates, sufficient pressure is not generated. That is, in this configuration, since sufficient plastic flow deformation as in the present invention does not occur, there is a problem that the bonding strength is weak. Further, since plastic flow deformation does not occur, the metal plate joined to the crop is often cut and separated at the time of joining.

An embodiment of the present invention based on this principle will be shown below.

(Embodiment 1) FIG. 1 shows a basic configuration of equipment suitable for carrying out the present invention. 1 is the leading bar material,
2 is a trailing bar material. A device 3 is provided for stacking the trailing bar material on the leading bar material. The stacking is performed by operating the elevator 4 to set the trailing bar material on the preceding bar material by the position adjuster 6 incorporated in the stacking and joining machine 5 to set the upper and lower shear blade positions together with the matching amount. Between the upper and lower shear blades, there is a wrap required to give sufficient plastic flow deformation. Next, after both rolled materials are clamped by the clamp mechanism 7, the upper shearing blade 8 is pushed toward the lower shearing blade 9 by 2/3 or more of the plate thickness of the bar material to give plastic flow deformation and to join and to cut the crop. The machine 10 cuts the crop, and the leveling roll 11 flattens the bar material to complete a series of joining processes. Simultaneously with the joining, the bar material is conveyed to the finish rolling mill. If step 14 for removing the oxide film on the surface of the bar material is added before joining, more stable joining becomes possible.

The equipment shown in FIG. 1 has a width of 1200 mm and a thickness of 2
To carry out continuous hot rolling of 0 mm bar material (mild steel), 1
After stacking the leading and trailing bar materials at 000 ° C and clamping the bar materials, the leading and trailing bar materials are pressed at a pushing speed of 100 mm / s in the direction of the plate thickness with the upper shear blade having the shape shown in FIG. The plastic flow deformation was performed to complete the joining, then the crop was divided, and the bar material bent due to the deformation was passed through a leveling roll to flatten the joining, thereby completing the joining. The lap between the upper and lower shear blades is 1.5 mm. The indentation depth was 22 mm. The display of the lapping amount here indicates that the positions of the upper shearing blade and the lower shearing blade have the relationship shown in FIG. That is, it indicates that the lower shear blade is within the moving position of the upper shear blade . In the following, the bonding machine 5 according to the embodiment
The joining principle by the method will be described with reference to FIGS. FIG. 4 shows the joining process, and FIG. 5 shows the details of the crimping process during plastic flow deformation. The symbol Lg is a lap between the upper and lower shear blades. Place the overlapping part of the leading bar material and the trailing bar material between the upper and lower shearing blades and clamp them so that they do not move during the plastic flow deformation process, then the upper shearing blade (lower shearing blade depending on the mechanism). Press to deform the leading and trailing bars. During the deformation process, the oxide film is divided and separated. Further, the pressing force acts between the joint surfaces during the deformation process to bring them into close contact with each other, and the residual materials 12 and 13 are divided by the crop. Therefore, in the present example, the crop cutting machine was not operated and was conveyed to the leveling roll to perform the flattening process.

FIG. 6 shows an example of the joining work sequence and the elapsed time by the joining machine 5. Stacking, clamp closing, vertical shear blade closing, plastic flow deformation (joining), clamp opening, shear blade opening,
The total time required for bonding was 3 seconds in the order of cropping and flattening. The net joining time, that is, the time required for plastic flow deformation is 0.2 seconds in this embodiment,
The present invention can be said to be an optimal method for shortening the joining time, which is the key to practical use. It has been stated that the positional relationship between the lap between the upper shearing blade and the lower shearing blade and the upper and lower shearing blades is important in order to divide and separate the oxide film and to exert a pressing force on the joint surface. Will be further explained using.
FIG. 7 is a diagram showing the relationship between the plate thickness of the bar material, the lap, the positional relationship between the upper and lower shear blades, and the bonding strength. The joining atmosphere is air and the temperature of the bar material is about 1000.degree. Here, the joining strength is a value obtained by obtaining the joining area from the fracture surface of the test piece after the tensile test and dividing the breaking load by the joining area. Pushing speed is 0.
It is 1 m / s. The indentation depth was the thickness of the plate. The plus and the minus added to the lap amount indicate the positional relationship between the upper and lower shear blades as described above. Minus is the upper shear blade
It shows that there is a lower shear blade outside of the moving direction of.
The joint strength is large in the case of plus lap plate thickness 20 mm
The rolling resistance was 0.1 mm or more, and the rolling resistance was 0.3 mm or more in the case of 30 mm. For plate thickness 20 mm, -3 mm, 30
In the case of mm, the maximum strength was shown at -6 mm. The appropriate lapping amount changes depending on the plate thickness, but within the plate thickness range of the applicable bar material is 0.5
It has been found that a bond strength that can withstand rolling can be obtained by limiting the range to 15 mm.

FIG. 8 shows the relationship between the indentation rate and the bonding strength. This is the case when the plate thickness is 20 mm. The lap is 5 mm. The pushing speed is 0.1 m / s. It is shown that if the thickness is about ⅔ or more of the plate thickness, the strength of 250 MPa or more, which is the rolling resistance, can be obtained. The same tendency was exhibited when the plate thickness was 30 mm. The rolling resistance here is a value clarified as a result of examining the relationship between the strength of the joint and the rolling property.

FIG. 9 shows the relationship between the bonding strength and the pushing speed. The lap is fixed at 5 mm and the plate thickness is 20 and 30 mm.
Within the experimental range, the bond strength tends to increase with increasing speed from 0.001 to 0.4 m / s. At 0.5 m / s or higher, an increase in strength became clearly visible. The reason for this increase is that the joint surface is melted by the sliding action in the plastic flow deformation process. That is, the dispersion of the oxide film and the improvement of the bonding rate due to the liquid phase intervene.

However, it is not necessary to increase the pushing speed for obtaining the strength to withstand rolling as shown in FIG.
Is shown, and an appropriate pushing speed may be selected within the constraints of joining time and deviceization.

FIG. 10 is a diagram showing the relationship between the bar material temperature, the deformation rate (Va), and the presence or absence of melting of the joint surface. Figure 1
If the deformation speed is 0.5 m / s or more from 0 to 800 ° C, the higher the bar material temperature, the higher the bar material temperature. / S. This result is common to the bar materials having a bar material melting start temperature of 1400 ° C. or higher, but the lower the bar material melting start temperature, the larger the melting depth and the higher the melting ratio. Note that FIG.
The presence or absence of melting is determined by 60% at the center of the bar material thickness.
It is done depending on whether it is melted or not. The melting depth is a value determined from the metal structure after corrosion of the cross section and
The determination of the melting ratio is similarly made from the metal structure.

Even if the welding is carried out at such a pushing speed that a molten portion is present, the amount of the molten material is small, so that the welding can be surely carried out without generating burrs.

As described above, according to the present embodiment, the leading bar member and the trailing bar member are superposed, clamped, and the lap between the upper shearing blade and the lower shearing blade is adjusted to ⅔ of the plate thickness. By plastic deformation, strong joining can be achieved, and depending on the indentation depth, it is also possible to split the crop during the plastic flow process, and unnecessary residual material can be processed at a stretch, and finish rolling can be continuous with the hot rolling equipment to improve productivity and yield. And the automation of operations can be realized.

Although the present invention is mainly composed of iron-based materials, it can be applied and developed even if the applied material changes. For example, the present invention can be applied to a material covered with a strong oxide film such as an aluminum alloy. It has been confirmed that since the deformation performance and the properties of the oxide film are different from those of iron-based materials, the amount of lapping is suppressed to be smaller than that of iron-based materials, and plastic flow deformation that is greater than that of iron-based materials causes strong bonding. As mentioned above, it is possible to expand to non-ferrous lines.

The increase in the amount of lap in the present invention means that
It means that the edge of the sheared upper plate member is pressed against the lower plate member to be deformed. That is, as the length of the lap portion is larger, the pressing force when the upper plate member and the lower plate member are sliding is larger, and the plastic deformation amount of both plate members is larger. If the wrap has a positive value, the sheared surface edges of the upper and lower plate materials will slide to some extent during shearing, and the new surfaces of both will contact and be joined, but the pressing force and plastic deformation will be small, resulting in As a result, insufficient bonding strength can be obtained. The required amount of lap depends on the type and thickness of the plates to be joined.

The feature in FIG. 2 is the shape of the upper shear blade. It suffices that the upper shearing blade slides on the shearing surface, and deforming the other portions results in energy loss. Conventionally, a method has been used in which the height of the upper plate member is shifted downward so that the heights of the upper plate member and the lower plate member are on the same plane. In the present invention,
Without changing the clamp position of the upper and lower plate materials, the shape of the shear blade is oblique when viewed from the lateral direction, that is, the height of the upper plate material and the lower plate material are on the same surface at the joining surface of the upper plate material, and at the clamp part of the upper plate material, the plate material is Use a shearing blade whose shape does not change the holding position. As a result, the structure of the joining machine can be simplified and energy loss can be reduced as compared with the case where the mounting position of the upper plate member is changed.

(Embodiment 2) With the same basic construction of equipment as in Embodiment 1, the shear blade and the clamp were shaped as shown in FIG. The clamp mechanism 7 and the lower shear blade 9 are inclined in parallel. With this configuration, the clamp mechanism 7 and the lower shear blade 9 are arranged so that a large pressing force is generated on the joint surface in the process of pushing the shear blade 8 from above the metal plate 2. The shear blade 9 was tilted in parallel. Even in this case, the upper shearing blade 8 and the lower shearing blade 9 are provided with a lap portion so that a sandwiching pressure is generated.
Since a large pressing force is generated on the joint surface, the joint strength increases and the shape of the joint after joining is flattened.
The effect that the leveling process after joining can also be omitted is obtained.

Example 3 As shown in FIG. 12, the upper shearing blade 8 and the lower shearing blade 9 were parallel links. In this configuration, by lowering the upper shear blade 8, a force for sandwiching the metal plates 1 and 2 with the lower shear blade is generated. Plastic flow occurs due to the sandwiching, and the joining can be performed according to the same principle as in the first embodiment. Even with this configuration, the metal plate after joining is flattened, so that the leveling step after joining can be omitted.

(Embodiment 4) As shown in FIG. 13, by pushing the upper shearing blade 8 obliquely against the metal plate, a force for sandwiching the metal plate is generated, and plastic flow can be caused. Even with this configuration, the metal plate after joining is flattened.

(Embodiment 5) As shown in FIG. 14, two metal plates to be joined are abutted and cut at their ends so that they can be joined, and then abutted together. A high temperature metal plate or a metal plate 2'prepared in advance is placed and the shearing blade is pushed from the upper surface or the lower surface to join. Although pre-treatment such as cropping and cutting for butting is increased, the leveling step can be omitted. In this case, even if there is no overlap between the upper shearing blade 8 and the lower shearing blade 9, a high pressure is generated on the metal plate due to the wedge effect, and sufficient plastic flow deformation occurs. Also, instead of using three metal plates, two metal plates can be superposed on each other for joining.

That is, according to the present invention, a clamping pressure (which may be called a confinement pressure) is applied to a very small part of the metal plate to be joined regardless of the arrangement of the shearing blades, so that the metal plate is deformed at a rate higher than the normal plastic deformation rate. By raising the strength, a strong bonding strength is obtained.

Example 6 FIG. 17 shows an overall view of the hot rolling apparatus of the present invention. Since the speed of the finishing mill after the joining machine is higher than the speed of the continuous casting machine, in order to match the speed of the line, an intermediate coiler is provided between the rough rolling machine 20 for the rolled material coming out of the continuous casting machine and the joining machine. A device for adjusting the winding speed of the metal plate , called 15, is required. After that, the winding coil attached to the metal plate is flattened by the leveler 16 by the intermediate coiler and then joined by the joining machine. The splicing machine has a structure for splicing while traveling on rails. When the joining machine of the present invention is used, cutting scraps called crops come out, so a crop treatment 17 for removing the crops is performed, and finishing mills 18, 19 are used.
Through the product. Since the welding speed of the welding machine of the present invention is 3 seconds or less, the traveling distance of the welding machine can be shortened. This allows the distance between the intermediate coiler and the finishing mill to be 65 m or less. Thereby, the continuous hot rolling equipment can be made very compact.

(Embodiment 7) FIG. 18 shows the basic construction of the joining machine of the present invention. 21 is an upper shear blade, 25 is a lower shear blade, 25
The lower shear blade is divided into 22 material-supporting lower shear blades and 24 material-supporting lower shear blades, which are connected by a lap adjusting mechanism of 23. Reference numeral 27 is a leading seat bar, and 26 is a trailing seat bar. FIG. 19 is an example of a basic configuration when the joining machine of the present invention is applied to continuous equipment for hot rolling. Reference numeral 27 is a leading seat bar, and 26 is a trailing seat bar. The oxide film on the surface of the bar material is removed by using the descaler 31 before stacking. An elevating device 32 for stacking the following bar material on the preceding bar material is provided. After overlapping, they are heated to a predetermined temperature by the heating mechanism 33. Shearing blade 2 under the joining machine 28
The space between the concave portions 5 has an upper shearing blade 21 and a necessary wrap in order to give sufficient plastic flow deformation. The bar material is pressed into a plate having a thickness greater than that of the bar material so as to be plastically flow-deformed and bonded, and the crop processing device 34 divides the crop into pieces, which are then conveyed to the finish rolling mill 35.

A bar material (mild steel) having a width of 1500 mm and a thickness of 30 mm was continuously hot-rolled by the equipment shown in FIG. 1
The bar material at a temperature of 000 ° C and that at a temperature of 900 ° C were superposed after partial descaling by high-pressure water injection, the superposed portion was heated to 950 ° C, and then fed to the joining machine.
The structure of the joining machine is as shown in FIG. Here, the lap amounts of the upper shearing blade, the lower shearing blade on the joining surface side, and the material supporting lower shearing blade were adjusted to 3 mm and 0 mm, respectively. The upper shear blade is shown in Figure 1.
The circular arc shape as shown in FIG. 8 was set to R240. The blade length in the longitudinal direction of the bar is 100 mm, and the blade width is 16
It is 00 mm. Both lower shear blade recesses are perpendicular to the bar stock. The upper shear blade was pressed in the direction of the plate thickness at a pressing speed of 300 mm / s to be 1.2 times the bar thickness, that is, 36 mm, and the joining was completed by plastically deforming the preceding and following bar materials. At this time, the portion corresponding to the final contact portion of the upper blade of the lower bar material has a shape that bites into the material supporting lower shear blade by about 5 mm. Next, the nail was pushed into the crop and scraped up to cut the crop to complete the joining. When this was sent to a finish rolling mill, continuous rolling could be performed without breaking the joint during rolling. FIG. 20 shows the above steps for each step. In this embodiment, the time required from the partial descaling 31 to the crop division 34 in FIG. 20 was 5 seconds. In addition, when the joining test of the simulated bar material was performed in the process of FIG. 20 until the end of the crop division, the test piece was cut out from the joined portion and the tensile test was performed, and the same strength as the base material was obtained.

(Embodiment 8) Using the joining apparatus of Embodiment 7, the lap amounts of the upper shear blade, the lower shear blade on the joint surface side, and the material supporting lower shear blade are 1.5 mm , 0 mm and 0 . Welding experiments were performed by adjusting to 5 mm and 0 mm and 5 mm and 0 mm. In all cases, good bonding strength was obtained.
Also, the lap amount between the upper shear blade and the lower shear blade on the joint surface side is 3 mm.
And wrap it with the shear blade under the material support -3 mm,-
Joining experiments were performed by changing the thickness to 1.5 mm and 1.5 mm. In all cases, good bonding strength was obtained.

The lapping amount of each of the upper shearing blade, the lower shearing blade on the joining surface side, and the material supporting lower shearing blade was 3 mm and 0 mm, and the pushing speed of the upper shearing blade was 5 mm / s, 10 mm / s, 50 mm.
/ S, 100 mm / s, and 500 mm / s were changed, and the joining experiment was performed. Good bonding strength was obtained in all cases, but the bonding strength increased as the indentation speed increased.

Under the same conditions as in Example 7, a lower shear blade was pushed upward by 36 mm to perform a joining experiment. The same joining strength as in Example 7 was obtained.

(Embodiment 9) The shape of the lower shear blade on the joint surface side of the joint device of the seventh embodiment is inclined to the upper shear blade side as shown in FIG. The angle was 5 degrees from the vertical direction. Using this joining machine, a joining test of a 30t mild steel simulated bar material was conducted. The lap amount, pushing stroke, and pushing speed were the same as in Example 7. The strength of the joint is 350MP
With a, higher strength than that of Example 7 was obtained. Further, the joining experiment was conducted by changing the angle of the lower shear blade on the joining surface side to 10, 15 and 20 degrees, but it was observed that the joining strength tended to increase as the angle increased.

(Embodiment 10) As shown in FIG. 22, the shape of the upper shearing blade of the joining apparatus of Embodiment 7 was inclined to the joining surface side lower shearing blade side. The angle was 15 degrees from the vertical direction. Using this joining machine, a joining test of a 30t mild steel simulated bar material was conducted. The lap amount, pushing stroke, and pushing speed were the same as in Example 7. Bonding strength higher than that of Example 7 was obtained.

(Embodiment 11) In the joining apparatus of Embodiment 7, the shape of the lower shear blade is shown in FIG.
As shown in, and a shape inclined Me oblique. The angle was 15 degrees from the traveling direction of the bar. The upper shearing blade had a shape in which a line inclined by 15 degrees from the vertical direction was the starting point of the arc, and the tangent line at the starting point of the arc was 0 degrees with the bar. Using this joining machine, a joining test of a 30t mild steel simulated bar material was conducted . Press to write <br/> only stroke 38mm, it was pushing speed 300mm / s. Sufficient bond strength was obtained to withstand rolling.

(Embodiment 12) As shown in FIG. 24, the upper shearing blade of the joining apparatus of Embodiment 7 was made to draw an arcuate trajectory centering on the joining portion side. Using this joining machine, a joining test of a 30t mild steel simulated bar material was conducted. The amount of lap, the pushing stroke (vertical direction), and the pushing speed were the same as in Example 7. The bonding strength similar to that in Example 7 was obtained.

(Embodiment 13) As shown in FIG. 25, the upper shearing blade of the joining apparatus of Embodiment 7 was designed to draw an arcuate trajectory centered on the side opposite to the joining portion. In this case, the lower shear blade was the same as in Example 7. Using this joining machine, a joining test of a 30t mild steel simulated bar material was conducted. The lap amount, the pushing stroke (vertical direction), and the pushing speed were the same as those in the first embodiment. The bonding strength similar to that in Example 7 was obtained.

(Embodiment 14) In the joining apparatus of Embodiment 7, as shown in FIG. 26, the upper shearing blade is divided into three in the plate width direction, and the shearing blades at both ends can project below the central portion. The mechanism was added. 100mm at each end, 14 at the center
The width was set to 00 mm. Using this device, the plate width is 1400 mm
And 1500 mm plates were joined. The plate thickness is 30 mm. The protrusion height was adjusted to 30 mm in advance, and the pushing stroke was the same 36 mm for the three parts. Sufficient bonding strength was obtained and the crop could be easily removed as in Example 7.

(Example 15) Using the joining apparatus of Example 7, sheet bars having plate thicknesses of 20 mm and 30 mm were joined. Both board widths are 1500 mm. The amount of lap was the same as in Example 7. The pushing stroke is 36mm, that is,
The stroke was set to 1.2 times the thick plate thickness. Example 7
Bonding strength similar to that obtained was obtained.

(Example 16) As shown in Fig. 27, the shape of the upper shearing blade of the joining device of Example 7 is such that 1/3 of the length of the blade in the longitudinal direction of the seat bar is a straight line parallel to the seat bar, and The subsequent portion was a straight line having an angle of 10 degrees from the seat bar, and the final contact portion was formed by an arc of R30. Using this joining machine, a joining test of a 30t mild steel simulated bar material was conducted. The lap amount, pushing stroke, and pushing speed were the same as in Example 7. Bonding strength higher than that of Example 7 was obtained.

(Embodiment 17) As shown in FIG. 28, the shape of the upper shearing blade of the joining apparatus of Embodiment 7 was changed to a multi-step arc shape in the seat bar longitudinal direction. R1 to R36 in the figure
0, R2 is R120, R3 is R80, and R4 is R30, and the shapes are smooth curves. Using this joining machine, a joining test of a 30t mild steel simulated bar material was conducted. The lap amount, pushing stroke, and pushing speed were the same as in Example 7. Bonding strength higher than that of Example 7 was obtained.

(Embodiment 18) As shown in FIG. 29, the shape of the upper shearing blade of the joining apparatus of Embodiment 7 is such that the contact start portion with the seat bar is not the joint portion but is displaced to the rear portion in the traveling direction of the sheet bar. Shaped. The lower part of the upper tool has an arc shape,
R240 mm. The starting point of the arc is a line inclined by 10 degrees from the vertical direction of the bar. Using this joining machine, a joining test of a 30t mild steel simulated bar material was conducted. The pushing stroke was 40 mm, and the other joining conditions were the same as in Example 7.
High bonding strength equivalent to that of Example 7 was obtained.

(Example 19) The shape of the upper shearing blade of the joining device of Example 7 as viewed from the upper surface of the sheet bar was formed into a corrugated shape as shown in FIG. As for the shape of the bar side as viewed from the lateral direction of the bar, the part corresponding to the corrugation was a straight line parallel to the bar, and the other part was formed with an arc. The shape of the lower shear blade viewed from above is the same wave shape as the upper blade. Using this joining machine, the same sheet bars as in Example 7 were joined. The joining conditions such as stroke and lap amount are the same as in the case of the seventh embodiment. Bonding strength higher than that of Example 7 was obtained.

[0092] (Embodiment 20) FIG. 31 a shape viewed from a sheet bar of the upper surface direction of the upper shearing blade of the bonding apparatus of Example 7, curve shape, as shown in FIG. 32,
The wave shape is configured by a rectangular shape. As for the shape of the bar side as viewed from the lateral direction of the bar, the part corresponding to the corrugation was a straight line parallel to the bar, and the other part was formed with an arc. The shape of the lower shear blade viewed from above is the same wave shape as the upper blade. Using this joining machine, the same sheet bars as in Example 7 were joined. The joining conditions such as stroke and lap amount are the same as in the case of the seventh embodiment. Bonding strength higher than that of Example 7 was obtained.

(Example 21) The shape of the upper shearing blade of the joining device of Example 7 as seen from the upper surface of the sheet bar was V-shaped with its end protruding in the direction of advance of the bar as shown in FIG. As for the shape of the bar side as viewed from the lateral direction of the bar, a straight line parallel to the bar was formed up to a portion corresponding to the bottom of the V-shape, and the other portions were formed by arcs. The shape of the lower blade was adjusted to the shape of the upper blade. Using this joining machine, the same sheet bars as in Example 7 were joined under the same joining conditions as in Example 7. When finish rolling was carried out thereafter, the edge cracked portion after rolling became smaller than in the case of Example 7.

(Embodiment 22) As shown in FIG. 34, the shape of the upper shear blade of the joining device of Embodiment 7 as seen from the upper surface of the sheet bar is triangular in a V-shape with its end protruding in the advancing direction of the bar. The waveform composed of is formed into a superposed shape. As for the shape of the bar side as viewed from the lateral direction of the bar, a straight line parallel to the bar was formed up to a portion corresponding to the bottom of the V-shape, and the other portions were formed by arcs. The shape of the lower blade was a shape combined with the upper blade.
Using this joining machine, the same sheet bars as in Example 7 were joined under the same joining conditions as in Example 7. Bond strength higher than that of Example 7 was obtained, and edge cracks after finish rolling were hardly observed.

(Example 23) In the joining machine of Example 1, the shear blade (upper shear blade) 8 and the support base (lower shear blade) 9 shown in FIG. 3 were used.
At the same time, the shearing blade 8 was moved in a direction approaching the metal plate to be joined and the shearing blade 8 was pushed into the overlapping portion of the bar members.
The shapes of the upper and lower shear blades, the pushing speed, the pushing depth, and the lapping amount are the same as those in the first embodiment. Here, the splicing machine is of a fixed type (that is, the splicing machine main body does not move in accordance with the movement of the bar material), and the upper and lower shear blades operate vertically with respect to the running bar material. It was a joining machine.

That is, while the shear blade 8 and the support base 9 are moved in the traveling direction of the bar material (synchronized with the moving speed of the bar material) by using the speed tuning device using a crank, the shear blade and the support base are simultaneously moved. It is operated by operating vertically to the bar material. Also in this embodiment, the bonding strength of the bar material is the same as that of the first embodiment.
The same thing as was obtained.

[0097]

According to the first aspect of the present invention, it is possible to join metal plates having sufficient strength in a short time. In particular,
To provide a joining device which is located between a hot rolling mill and a cold rolling mill, and which is necessary for joining rolling materials (referred to as a sheet bar) because the rolling speeds of the rolling mills are different from each other. You can

According to the second aspect of the present invention, since the time required for joining is short, the total length of rolling equipment can be shortened. You can omit the looper. Since sufficient joining strength can be obtained, the joining portion is not broken during rolling and the surface of the rolling roll is not damaged. The effect such as can be obtained.

According to the third aspect of the present invention, it is possible to obtain strong joining between metal plates.

[Brief description of drawings]

FIG. 1 is a diagram showing a basic configuration of a hot-rolled material joining machine according to an embodiment of the present invention.

FIG. 2 is a diagram showing a joining principle of the present invention.

FIG. 3 is a diagram showing the positional relationship between the upper and lower shear blades when the upper shear blade is pushed in.

FIG. 4 is a diagram showing an outline of a bonding process of the present invention.

FIG. 5 is a view showing the joining principle of the present invention, showing the crimping process during plastic flow deformation.

FIG. 6 is a diagram showing an example of a joining work order and elapsed time according to the present invention.

FIG. 7 is a diagram showing the relationship between the plate thickness and the lapping amount of the bar material according to the present invention.

FIG. 8 is a diagram showing the relationship between the indentation rate into a bar material and the bonding strength according to the present invention.

FIG. 9 is a diagram showing a relationship between a pushing speed and a bonding strength according to the present invention.

FIG. 10 is a diagram showing the relationship between the bar material temperature, the pushing speed, and the presence or absence of melting of the joint surface according to the present invention.

FIG. 11 is a cross-sectional view of an example of the joining machine of the present invention.

FIG. 12 is a cross-sectional view of an example of the joining machine of the present invention.

FIG. 13 is a cross-sectional view of an example of the joining machine of the present invention.

FIG. 14 is a sectional view of an example of the joining machine of the present invention.

FIG. 15 is a cross-sectional view of an example of a shear blade shape of the joining machine of the present invention.

FIG. 16 is a cross-sectional view of one example of the shear blade shape of the joining machine of the present invention as seen from the plate width direction.

FIG. 17 is a diagram showing an overall view of rolling equipment of the present invention.

FIG. 18 is a diagram showing a basic configuration of a hot-rolled material joining machine according to an embodiment of the present invention.

FIG. 19 is a diagram showing a configuration in which the joining machine of the present invention is incorporated in hot rolling equipment.

FIG. 20 is a diagram showing an outline of a joining process of the present invention.

FIG. 21 is a cross-sectional view of a seat bar of an example of the joining machine of the present invention as seen from the lateral direction.

FIG. 22 is a cross-sectional view of a seat bar as an example of the joining machine according to the present invention as seen from the lateral direction.

FIG. 23 is a cross-sectional view of a seat bar of an example of the joining machine of the present invention as seen from the lateral direction.

FIG. 24 is a cross-sectional view of a sheet bar of an example of the joining machine of the present invention as seen from the lateral direction.

FIG. 25 is a cross-sectional view of a seat bar of an example of the joining machine of the present invention as seen from the lateral direction.

FIG. 26 is a sectional view of the example of the joining machine of the present invention as seen from the traveling direction of the sheet bar.

FIG. 27 is a cross-sectional view of a seat bar of an example of the joining machine of the present invention as seen from the lateral direction.

FIG. 28 is a cross-sectional view of a seat bar of an example of the joining machine of the present invention as seen from the lateral direction.

FIG. 29 is a cross-sectional view of a seat bar of an example of the joining machine of the present invention as seen from the lateral direction.

FIG. 30 is a sectional view of the example of the joining machine of the present invention as seen from above the sheet bar.

FIG. 31 is a cross-sectional view of the example of the joining machine of the present invention seen from above the sheet bar.

FIG. 32 is a cross-sectional view of the example of the joining machine of the present invention seen from above the sheet bar.

FIG. 33 is a cross-sectional view of the example of the joining machine of the present invention seen from above the sheet bar.

FIG. 34 is a sectional view of the example of the joining machine of the present invention seen from above the sheet bar.

[Explanation of symbols]

1 ... Metal plate, 3 ... Bar material stacking device, 4 ... Bar material elevator,
5 ... Joining machine, 6 ... Position adjusting machine, 7 ... Clamping mechanism, 8,
21, 38, 39, 42, 44, 47, 48, 49, 5
0, 52, 54, 56, 58 ... Upper shear blade, 9, 25, 3
7, 51, 53, 55, 57, 59 ... Lower shear blade, 10 ...
Crop cutting machine, 11 ... Leveling roll, 12, 13
... Remaining material, 14 ... Oxide film removing device, 15 ... Intermediate coiler, 16 ... Leveler, 17 ... Crop treatment, 18, 19
... Finishing mill, 22, 41 ... Lower shearing blade for supporting material, 23
... Lap adjusting mechanism, 24, 36, 40 ... Lower shearing blade on the joining surface side, 26 ... Trailing sheet bar, 27 ... Leading sheet bar, 2
8 ... Joining machine, 29 ... Leading bar descaling mechanism, 30
… Subsequent bar descaling mechanism, 31… Descaler,
32 ... Stacking lifting device, 33 ... Heating mechanism, 34 ... Crop processing device, 35 ... Finishing rolling machine, 43 ... Upper blade rotation operation mechanism, 45 ... Upper center shear blade, 46 ... End stroke upper shear blade with independent stroke adjusting function .

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takashi Masuko, Inventor Takashi 7-1, 1-1 Omika-cho, Hitachi-shi, Ibaraki Hitachi Ltd. Hitachi Research Laboratory (72) Inventor Tadashi Nishino 3-chome, Saiwai-cho, Hitachi, Ibaraki No. 1 Hitachi Ltd., Hitachi Plant (72) Inventor Mitsuo Nihei 72-1 Omika-cho, Hitachi City, Ibaraki Prefecture Hitachi Ltd. Electric Power & Electric Development Division (72) Inventor Kenji Horii Hitachi City, Ibaraki Prefecture 3-1, 1-1 Machi Hitachi Ltd., Hitachi Factory (72) Inventor Yasushi Yoshimura 3-1-1 1-1 Sachimachi, Hitachi City, Ibaraki Hitachi Ltd. Hitachi Factory (72) Inventor Toshiyuki Kajiwara Chiyoda, Tokyo 4-6 Surugadai, Kanda-ku, Hitachi, Ltd. (72) Inventor Kenichi Yasuda 7-2-1, Omika-cho, Hitachi-shi, Ibaraki Hitachi, Ltd. Electric Power & Electric Machinery Development Headquarters (72) Inventor Yoshio Takakura 3-1, 1-1 Sachimachi, Hitachi City, Ibaraki Hitachi Ltd. Hitachi Factory, Hitachi (72) Inventor Hironori Shigama Sankocho, Hitachi City, Ibaraki Prefecture 1-1-1, Hitachi, Ltd., Hitachi Plant (56) References JP-A-5-245507 (JP, A) JP-A-61-159205 (JP, A) JP-A-7-178416 (JP, A) JP-A-61-144285 (JP, A) JP-A-61-286004 (JP, A) JP-A-4-89120 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B21B 15/00 B21B 1/26 B21D 39/03 B23K 20/00-20/04 B23K 37/04

Claims (23)

(57) [Claims] 1. A joining device for joining a plurality of metal plates by superposing them on each other , wherein a superposed portion of the metal plates is supported from one side of the metal plates.
For supporting at least two supporting bases and one supporting base.
Be careful not to move the metal plates in pairs in the longitudinal direction.
The clamp mechanism that bundles the metal plate and the one that faces the clamp mechanism.
The pair of shear blades and the pair of shear blades are sandwiched between the metal plates.
Equipped with a shear blade moving mechanism that moves relative to each other
The support base also serves as one of the pair of shear blades.
The pair of shear blades have their extension lines intersecting with each other.
And the shear blade moving mechanism is 50% or more of the plate thickness of the metal plate.
Shear at the depth of
A metal plate joining device characterized by moving a blade . 2. The method of claim 1 , wherein one of the supports is sheared.
The metal plate is used as a cutting blade and also as a shearing blade.
The other shearing blade is provided at a position opposite to the other, and the other shearing blade is
The support base whose extension line of the cutting locus also functions as the shearing blade
An apparatus for joining metal plates, which is characterized by intersecting with . The other shearing blade 3. A process according to claim 2 wherein, the distance the lower end of the side where the operating locus crosses the support base is in the overlapping portions than the lower end portion of the side closer to the other of the support base A metal plate joining device characterized by being close to each other. 4. The overlap portion according to claim 1 is the gold.
Characteristic of 0.1 mm or more in the longitudinal direction of the metal plate
A device for joining metal plates . 5. An apparatus for joining metal plates according to claim 4, wherein the overlapped portion has a maximum length of 10 mm or less in the longitudinal direction of the metal plates . 6. The operating blade of a pair of shear blades according to claim 1 .
Bonding apparatus of metal plates, wherein the stroke is on one of the metal plates of the plate Atsu以. 7. A joining device for a metal plate, wherein the joining device according to claim 1 comprises a mechanism capable of moving on a rail. 8. An apparatus for joining metal plates, wherein the support bases according to claim 1 are concave shapes connected to each other. 9. A metal plate joining apparatus , wherein the metal plate according to claim 1 is a hot rolled material. 10. The shear blade according to claim 1 , wherein the cross-sectional shape of the metal plate when viewed from the lateral side in the longitudinal direction is a trapezoidal polygonal shape, and the contact area with the plate of the blade changes continuously. The angle in the longitudinal direction with respect to the plate where the blade first contacts the plate is approximately 0.
A joining device for metal plates, which is characterized by a degree. 11. The metal plate joining apparatus according to claim 1 , wherein the cross-sectional shape of the shear blade as viewed from the lateral side in the longitudinal direction of the metal plate is different in the plate width direction. Shear blade 12. The method of claim 1 wherein the metal or on the longitudinal direction of the metal plate, the shape viewed from below, characterized by having a configured wave-shaped in a straight line or a curve
Board joining device. 13. The shearing blade according to claim 1 , wherein the shape of the metal plate as viewed from above or below in the longitudinal direction is a V-shape with both ends protruding in the traveling direction of the sheet bar. A device for joining metal plates, which is characterized in that 14. The apparatus for joining metal plates according to claim 8, wherein the concave support base has a gap in the longitudinal direction of the metal plates to be joined that is smaller toward the shear blade side. 15. The bonding apparatus of claim 1, wherein the bonding apparatus of the metal plates, characterized in that it comprises a mechanism for superimposing after descaling at least part of the portion superposing the metal plate superposed. 16. concave support base according to claim 8, the length of the metal plate partial longitudinal inlet recessed its <br/> is, the metal plate longitudinal shear blades facing each other across a metal plate In the direction
A device for joining metal plates, which is shorter than the length that can be used. 17. A bonding apparatus according to claim 1, the bonding apparatus of the metal plates that characterized that has a mechanism for adjusting the temperature of the metal plate to be bonded before bonding. 18. The apparatus for joining metal plates according to claim 1, wherein a pushing speed of the shear blade or the support base into the metal sheet to be joined is 5 mm / s or more. 19. In a hot rolling facility, an intermediate coiler for winding a metal plate, a leveler for flattening the metal plate coming out of the intermediate coiler, and a joining machine for superposing and joining the metal plates coming out of the leveler, A hot-rolling facility comprising a cropping device for dividing a crop generated during joining and a finishing mill, wherein the joining machine is the joining device according to claim 1. 20. After stacking at least two metal plates, the metal plates are elongated at least at two positions of the stacked parts.
Bind from both sides so that they do not move in the hand direction, and insert a pair of metal plates so that the metal plate is sandwiched between the two restricted places.
Shear blades are arranged, and the pair of shear blades are
The extension lines are overlapped so as to intersect with each other, and the shear blade is arranged in the thickness direction of the metal plate in the thickness direction of the metal plate.
So that and overlapping parts 50% or more is not cleaved
The metal plate is relatively moved, thereby applying a shearing force in the plate thickness direction of the metal plate, and the metal plate is solidified while generating a pressing force on the sheared surface of the overlapping portion so that the sheared surfaces are pressed against each other. A method for joining metal plates, which comprises performing phase joining. 21. The length of the overlapping portion of a pair of the shear blades according to claim 20,
A method for joining metal plates, which is within a range of 10 mm. 22. The method for joining metal plates according to claim 20, wherein oxide scale on at least a part of the surfaces of the metal plates is removed before the metal plates are stacked. 23. Abutting the ends of two metal plates,
Put another metal plate on top or bottom of the butted part
Prevent the metal plate from moving in the longitudinal direction at the two parts of the mating part
Restrained from both sides to the other gold between the two restrained places.
Push in the shear blade from above the metal plate and put the other metal plate in front.
Push down to the position of the two metal plates that are
The two metal plates abutted by the other metal plate
Method for joining metal plates, characterized by joining via a gap
Law.