KR100241315B1 - Method and apparatus for joining hot strips - Google Patents

Abstract

The rear end of the preceding bar is inclined with respect to the trailing bar by θ so that the lower end of the trailing end of the trailing bar is moved in a vertical direction than the lower end of the rear end of the preceding bar so as to hit the rear end of the preceding bar. Thereafter, the trailing bar ash is pressed in the vertical direction with a predetermined force. Since the rear end face is inclined by θ with respect to the front end face, a relative slippage is caused between the two end faces, and a pressure P is generated due to the wedge effect. Plastic deformation occurs. By this plastic deformation and relative slip, the oxidized scale of the cross-sectional surface is removed to expose the bottom metal surface, and at the same time, it is joined by the pressing force and the plastic deformation by the pressure P. As a result, the bar material is bonded in a short time to achieve combustion hot rolling.

Description

Bonding method and apparatus of hot rolled material

FIG. 1 is a diagram showing a method of joining a hot rolled material according to Example 1 of the present invention, and FIGS. 1 (a), (b) and (c) show the processes, respectively.

2 is a view showing a method of joining a hot rolled material according to a second embodiment of the present invention.

3 is a view showing a method of joining a hot rolled material according to a third embodiment of the present invention.

4 is a view showing a joining method of a hot rolled material according to a fourth embodiment of the present invention.

5 is a schematic view of a continuous hot rolling facility having a joining device for hot rolled materials of the present invention.

6 is a partial cross-sectional side view of the apparatus for joining hot rolled materials according to Example 1 of the present invention.

7 is a partial cross-sectional side view of a bonding apparatus for a hot rolled material according to a second embodiment of the present invention.

8 is a partial cross-sectional side view of a bonding apparatus for a hot rolled material according to a third embodiment of the present invention.

9 is a partial cross-sectional side view of a bonding apparatus for a hot rolled material according to a fourth embodiment of the present invention.

FIG. 10 is a partial sectional front view seen from the right side of the bonding apparatus shown in FIG. 9; FIG.

11 is a partial cross-sectional rear view seen from the left side of the bonding apparatus shown in FIG.

FIG. 12 is a diagram showing a procedure of joining operations by the joining apparatus shown in FIG.

FIG. 13 is a diagram showing details of a step granting sequence and a joining sequence among the joining operations shown in FIG. 12;

Fig. 13 (a) shows the step giving step and Fig. 13 (b) shows the joining step, respectively.

14 is an explanatory diagram of a link mechanism of the bonding apparatus shown in FIG.

FIG. 15 is a diagram showing the relationship between the stepped amount a and the pressure difference amount x by the link mechanism shown in FIG.

FIG. 16 is a diagram showing the effect of the mold shape by the bonding apparatus shown in FIG.

16 (a) shows the bonded state according to the present embodiment,

FIG. 16 (b) shows the bonding state when the shape of this embodiment for comparison was not adopted.

17 is a partial cross-sectional side view of a bonding apparatus for a hot rolled material according to a fifth embodiment of the present invention.

FIG. 18 is a partial cross-sectional front view seen from the right side of the bonding apparatus shown in FIG. 17. FIG.

19 is a view showing a bar re-lifting member at the lowered position of the bonding apparatus shown in FIG. 17;

FIG. 20 is a view showing a bar re-lifting member in the raised position of the bonding apparatus shown in FIG. 17; FIG.

21 is a cross-sectional view taken along line XXI-XXI of FIG. 17;

FIG. 22 is an explanatory diagram of a link mechanism of the bonding apparatus shown in FIG. 17; FIG.

FIG. 23 is a diagram showing the operation principle of the link mechanism shown in FIG.

FIG. 24 is a diagram showing the relationship between the position y of the connecting pin D ₁ and the pressure difference amount x by the link mechanism shown in FIG. 22; FIG.

25 is a partial cross-sectional side view of a bonding apparatus for a hot rolled material according to a sixth embodiment of the present invention.

FIG. 26 is a diagram showing the relationship between the joining time t of the bonding apparatus shown in FIG. 25, the die pushing amount S, and the pressing pressure Q; FIG.

FIG. 27 shows an embodiment in the case of performing zigzag joining in the joining method of the present invention.

Fig. 27 (a) is a cross-sectional view of the mold portion of the 27th (b) shown joint before joining.

FIG. 28 is a plan view showing a cross-sectional shape of a zigzag joined portion and spiked protrusions in the embodiment of FIG. 27; FIG.

FIG. 29 is the same as FIG. 28 showing another cross-sectional shape of the spike-like protrusion;

30 is a cross-sectional view of a mold part showing another embodiment in the case of performing zigzag joining in the joining method of the present invention.

31 is a sectional view taken along the line XXXI-XXXI of FIG. 30;

32 is a plan view showing a cross-sectional shape of a zigzag junction part and a rack tooth projection in the embodiment of FIG. 30;

33 is a view showing one embodiment when there is a difference in plate thickness in the joining method of the present invention.

34 is a view showing an embodiment when there is a difference in plate width in the bonding method of the present invention.

* Explanation of symbols for main parts of the drawings

1: Leading rod 2: Rear rod

4,5: mold for clamp 9,10: cylinder

11,12: pinch roller 15: table roller

17: measuring roller 21, 22: link

23,24: Mold frame 28,29: Stopper

30: protrusion 40: movable frame

46: hydraulic cylinder 51: continuous casting machine

53: first rolling mill 54: finishing rolling mill

60: shearing machine 71: worm reducer

73: worm reducer 74: servo valve

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling equipment for a hot plate of metal, and in particular, when rolling a hot rolled material into a primary rolling mill and a finish rolling mill, a method of joining a hot rolled material to enable continuous rolling by joining the rolling materials in a short time. And to an apparatus.

There is a strong demand for continuous improvement of finish rolling with a hot rolling machine for metal to improve productivity, improve quality and automate operation. The key technique is the bonding of basil. If the bonding of the bar material is not completed in a short time, for example, when the bonding machine is driven, the traveling distance of the bonding machine becomes long and it is difficult to realize. In addition, when the bonding machine is fixed, the thickness of the bar material is usually 30 to 50 mm, so that a huge looper is required to accumulate the bar material.

Conventionally, many methods, such as a heat transfer method, a gas heating, or a solvent method, are devised regarding the joining method of bar materials. However, each has once and foreseeed no realization. Among them, the biggest difficulty is related to the joining time as described above, and it takes 20-30 seconds in the shortest time, including preparation before joining, removal of deflection by pressing, etc. . Another problem is that the joining conditions are subtle and both sides of the joining depend on slight differences in conditions. Therefore, in order to realize the continuation of rolling which can be useful for practical use, the technique which enables the joining of a bar material surely in a short time is required.

Therefore, many attempts have been made to mechanically join the electric, gas, or the like that do not require time. For example, Japanese Unexamined Patent Application Publication No. 51-137649 describes a method of overlapping and pressing part of a bar material. Japanese Laid-Open Patent Publications No. 51-130665 and Japanese Patent Laid-Open No. 60-102207 describe a method of joining bar materials by cutting the bar materials obliquely in the thickness direction and rolling the overlapped cut surfaces of both bar materials.

However, the above conventional technologies have the following problems, respectively.

First, the prior art described in Japanese Patent Laid-Open No. 51-137649 has less relative sliding of both bar materials, so that the occurrence of a new surface serving as a joining surface is less, and the bonding of the bar materials is insufficient in the experiment.

Further, the prior art described in Japanese Patent Laid-Open Publication Nos. 51-130665 and 60-102207 discloses that it is difficult to first cut the bar material at an angle with the usual gallotine in the first, and when the inclined cutting angle is large, the cutting is made. This becomes more difficult. Thus, in the same way as milling cutters, slanted cutting is possible, but takes too much time. In addition, even if the inclined cutting is possible, if the cut surfaces of both bar materials are rolled over and rolled together, it is not sufficient to remove the fracture of the scale of the joining surface.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method and apparatus for joining a hot rolled material and a continuous hot rolled method and equipment for steadily joining bar materials in a short time to realize continuous rolling.

In order to achieve the above object, according to the present invention, in a method of joining a hot rolled material in which a preceding rolled material and a subsequent rolled material are joined by a line of a hot rolling facility, a cross section of a rear end portion of the preceding rolled material and a leading end portion of the subsequent rolled material A method of joining a hot rolled material is provided, wherein both rolling materials are joined by generating relative slippage between both end faces while pressing the cross sections of each other to plastically deform.

Relative slipping occurs between both end faces while pressing the end face of the preceding end of the rolled material and the end of the subsequent rolled material so as to plastically deform each other. At the same time, the exposed metal surfaces are pressed together, whereby both rolls can be reliably joined in a short time.

In the joining method, preferably, the plastic deformation is caused by relative movement of the preceding and subsequent rolling materials to approach each other when the relative slip is generated.

Preferably, at least one of the rear end portion of the preceding rolled material and the leading end portion of the subsequent rolled material is moved relative to the other in a direction inclined with respect to the cross section of the other rolling portion end, thereby generating the relative slip and plastic deformation. Let's do it.

At least one of the rear end of the preceding rolled material and the leading end of the subsequent rolled material is moved relative to the other in the inclined direction with respect to the cross section of the other rolled material, so that the relative slip occurs due to the wedge effect and the horizontal direction (plate Since the force in the longitudinal direction is generated, both of the relative sliding and the pressing accompanied by plastic deformation can be performed in one operation.

In the joining method, preferably, the rear end of the preceding rolled material and at least one of the leading end of the subsequent rolled material are inclined with respect to the other side, and the rear end of the preceding rolled material and the tip of the trailing rolled material are mutually disposed. At the same time, one side is pushed to the other side to sandwich and then at least one of the rear end portion of the preceding rolled material and the front end portion of the succeeding rolled material is moved relative to the deviation elimination direction to generate the relative slippage and plastic deformation.

Instead, the rear end of the preceding rolled material and the leading end of the succeeding rolled material are mutually abutted and simultaneously pushed to one side to the other side, and then at least one of the rear end of the preceding rolled material and the leading end of the subsequent rolled material is The relative slippage and plastic deformation may be caused by the relative movement in the inclined direction with respect to the end surface of the rolled material.

In addition, one of the rear end portion of the preceding rolled material and the front end portion of the subsequent rolled material may be bent, and the bent end may be pushed to the other side to be pinched to another side, and then the relative end and the plastic deformation may be generated by removing the bent end.

Again, the rear end and the tip end are interleaved, and the other end is pushed to the other side to obliquely cut at least one end surface of the rear end of the preceding rolled material and the front end of the subsequent rolled material, and then the other end of the preceding rolled material is sandwiched. And the relative slippage and plastic deformation may be caused by relative movement of at least one of the tip portions of the subsequent rolling material in the direction of eliminating the deviation.

The relative slip is preferably generated in the plate thickness direction of the rolled material, but may be generated in the width direction of the plate.

In the joining method, preferably, when the relative slip is generated while the pressing is performed, the joining surface of the preceding rolled material and the subsequent rolled material is deformed into a zigzag. Further, preferably, the widthwise edges of one plate of the preceding rolled material and the subsequent rolled material are bonded with respect to the widthwise edge of the other plate.

When the relative slip is generated while pressing, the bonding surface of the preceding rolled material and the subsequent rolled material is deformed in a zigzag to improve the bonding strength against the rattling (vibration) during conveyance after joining, thereby preventing separation during conveyance.

The widthwise edge of one plate is dug to the other end surface by the plastic deformation by joining the widthwise edges of one plate of the preceding rolled material and the subsequent rolled material with respect to the widthwise edge of the other plate. Edge separation is prevented.

In order to achieve the above object, according to the present invention, in the continuous hot rolling method in a hot rolling facility having at least one primary rolling mill and a finish rolling mill group,

(a) rolling a plurality of slabs with the first rolling mill to obtain a bar material in turn;

(b) bonding the bar material;

(c) continuously rolling the contacted bar material into the finishing mill group;

(d) joining by generating relative slip between the two end faces while pressing the end faces of the preceding bar material and the end portions of the following bar material to plastically deform with each other when the bar material is joined;

Continuous hot rolling method characterized in that is provided.

Further, in order to achieve the above object, according to the present invention, in the hot rolling material joining apparatus for joining the preceding roll material and the subsequent roll material in the line of the hot rolling equipment,

(a) first and second mold apparatuses each independently sandwiching a rear end of the preceding rolled material and a front end of the subsequent rolled material;

(b) at least one of the first and second mold apparatuses is inclined toward one end of the other end of the rolling material relative to the other of the rear end of the preceding rolling material and the leading end of the subsequent rolling material. Drive means operable to move relative to each other; Provided is a bonding apparatus for a hot rolled material, comprising:

The rear end of the preceding rolled material and the leading end of the trailing rolled material are sandwiched independently of the first and second mold apparatuses, and at least one of the first and the second mold apparatuses is placed between the rear end of the preceding rolled material and the trailing rolled material. By operating one end of the tip relative to the other in an inclined direction toward the cross section of the other end of the rolled material, the end faces of the preceding rolled material and the end of the trailing rolled material are pressed against each other so as to plastically deform each other. Relative slip is generated in between, and the preceding and following rolling materials are joined as described above.

In the said joining apparatus, Preferably, the said 1st and 2nd metal mold | die apparatus is comprised so that lifting / lowering is possible, respectively.

Preferably, the first and second mold apparatuses are formed by tilting at least one of the rear end portion of the preceding rolled material and the leading end portion of the trailing rolled material with respect to the other side, and the rear end portion of the preceding rolled material and the trailing rolled material. At the same time, the front end portions are mutually pushed and the other side is pushed to the other side, and the driving means operates at least one of the first and second mold apparatuses in a direction to eliminate the misalignment.

More preferably, the first and second mold apparatuses hold the rear end portion of the preceding rolled material and the leading end portion of the trailing rolled material from each other and simultaneously push one side to the other to sandwich the driving device. At least one of the mold apparatus 2 is operated in a direction in which one of the trailing end of the preceding rolled material and the leading end of the trailing rolled material faces the end face of the other rolled cutting material and at the same time eliminates the misalignment.

More preferably, the bonding apparatus further includes a position adjusting device for adjusting the height direction position of the rolled material.

More preferably, the bonding apparatus further includes a conveying apparatus for driving the first and second mold apparatuses and the pressing means in the traveling direction of the rolled material.

Preferably, the first and second mold apparatuses each have a plurality of spike-like protrusions on the surface of the rolled material, and the plurality of protrusions are arranged in a zigzag shape with respect to the joint line formed by the joint surface of the end of the rolled material. Is placed. Instead, each of the first and second mold apparatuses may have a plurality of rack-toothed projections on the narrow surface of the rolling material, and the plurality of projections may be arranged beyond the joining line formed by the joining surface of the end of the rolling material.

Splicing a plurality of protrusions are provided on the surface of the first and second mold apparatuses, and the plurality of protrusions are arranged in a zigzag shape with respect to the joining line formed by the joint surface of the rolled end portion, thereby joining the preceding and subsequent rolling materials. The surface becomes zigzag, which improves the bonding strength against vibrations in the conveyance.

Joining the preceding rolled material and the subsequent rolled material by arranging a plurality of rack-toothed projections on the narrow surfaces of the first and second mold apparatuses and arranging the plurality of projections beyond the joining line formed by the joining surface at the end of the rolling material. The surface becomes zigzag to improve the bond strength against vibration during conveyance.

In order to achieve the above object, according to the present invention, in the hot rolling material joining apparatus for joining the pre-rolled material and the rear rolling material in the line of the hot rolling equipment,

(a) movable first and second mold apparatuses which independently sandwich the rear end of the preceding rolled material and the front end of the succeeding rolled material, respectively;

(b) first actuating means for applying a driving force in a moving direction to at least one of said first and second mold apparatuses;

(c) the first and second mold apparatuses are operatively connected, and one side of the first and second mold apparatuses is opposite to the other when the driving force by the first operating means is applied. Link means for moving in an inclined direction toward the side; Provided is a bonding apparatus for a hot rolled material, comprising:

The first and second mold devices are linked by sandwiching the preceding and following rolling materials with the first and second mold devices, respectively, and exerting a driving force in the moving direction on at least one of the first and second mold devices. By the action of the means, one side is moved in an inclined direction toward the other, and a relative sliding force is generated between the end surface of the trailing end of the preceding rolled material and the end surface of the trailing rolled material, and the pressing force in the horizontal direction is applied to the rolling material. Occurs between the cross-sections of the cross-sections so that both cross-sections are pressed to plastic deformation and are in a state suitable for joining as described above. That is, due to the relative slippage between the two end faces and the pressure accompanying the plastic deformation, the oxide scale of the fragment surface of both the rolling materials is peeled off to expose the bottom metal surface, and at the same time, the exposed metal surfaces are pressed together so that both the rolling materials are pressed in a short time. It is surely joined.

On the other hand, the horizontal force generated by the wedge effect when pressing the cross section of the rolled material is blocked by the link means and does not act on the longitudinal member of the main frame.

In the joining apparatus, preferably, the link means constitutes a quadrilateral link with the first and second mold apparatuses.

Further preferably, the bonding apparatus further includes second operating means for moving one of the first and second mold apparatuses relative to the other and forming a step in a direction orthogonal to the length direction of the rolled sheet between the two. The link means is configured such that the position of a point related to the one mold apparatus does not change when the second actuating means moves.

Preferably, the link means has a plurality of links and connecting pins, and at least one position of the plurality of connecting pins is adjustable, whereby the one side when the driving force by the first actuating means is applied. It is possible to adjust the amount of movement in the longitudinal direction of the rolling material plate of the mold apparatus. Thereby, the plastic deformation amount at the time of pressing the end surface of a rolling material is adjusted, and the crimping amount is adjusted.

Preferably, the joining apparatus further includes a first stopper means for limiting the amount of movement in the direction orthogonal to the rolling material sheet length direction of the one mold apparatus when the driving force by the first actuating means is applied. The height of the first stopper means can be adjusted.

Preferably, the joining apparatus is further provided with a second stopper means for limiting the amount of movement in the direction orthogonal to the rolling material sheet length direction of the one mold apparatus during the movement by the second actuating means. It is possible to adjust the height of the stopper means.

The height of the first and second stopper means for limiting the movement amount in the direction orthogonal to the rolling material sheet length direction of the mold apparatus can be adjusted to adjust the step amount in the plate thickness direction of the preceding and subsequent rolling materials and the mold. Adjustment of the amount of pushing down of the apparatus can be easily performed corresponding to the thickness of the rolled material, and also the amount of crimping at the time of joining can be adjusted.

Preferably, the first and second mold apparatuses each have a pair of upper and lower molds, and the lower mold of the first mold apparatus includes a portion of the rear end portion of the preceding roll material and the front end portion of the subsequent roll material. It has a length that can be supported, and the mold above the second mold apparatus has a length capable of supporting a portion of the leading end of the following rolling material and the rear end of the preceding rolling material.

In this way, the lower mold of the first mold apparatus and the second mold apparatus have a length that can support a part of the rolling material on the side which does not directly sandwich the mold, thereby preventing sagging at the joining portion and during conveyance after joining. The likelihood of joining parts coming off during rolling is reduced.

Further preferably, the joining apparatus further includes a liftable lifting means for lifting the preceding and following rolled materials from the surfaces of the first and second mold apparatuses after joining. By lifting the lifting means to lift the preceding rolled material and the subsequent rolled material from the mold surface, the rolled material dug into the mold surface at the time of joining can be easily separated.

Further preferably, the bonding apparatus further includes means for applying a force in advance in the direction of the load acting on the link means to remove the margin. This makes it possible to accurately adjust the amount of crimp.

Further preferably, the joining apparatus includes means for applying vibration to at least one of the preceding and following rolling materials when the one mold apparatus is moved in an inclined direction toward the other mold apparatus by the link means. It is further provided. In addition, ultrasonic waves may be applied instead of vibrations.

By moving the mold apparatus while giving vibration or ultrasonic waves to at least one of the preceding rolled material and the subsequent rolled material, the grinding and dispersing of the surface oxidation scale at the joining portion of the rolled material is promoted to increase the bonding strength.

Further, in order to achieve the above object, according to the present invention, in a continuous hot rolling facility having at least one primary rolling mill and a finish rolling mill group, a bar material installed between the primary rolling mill and the finish rolling mill group and rolled with a primary rolling mill is used. Provided is a continuous hot rolling facility, comprising a joining device having the above-described configuration for joining one after another.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Example of joining method]

First, the principle of the bonding method of the present invention will be described. The joining method of the hot rolled material of this invention is based on the following knowledge.

(1) Whether to join the hot bar material depends on the cleanliness (C), the material temperature (T), and the pressure pressure (P) of the bonding surface. It is clear from the example of clad rolling that bonding can be performed even at room temperature if cleanliness is perfect. In the case of hot rolled materials, it is almost oxide scale that affects the cleanliness. Therefore, if only the scale of oxidation is pressed by the pressure (P) according to the material temperature (T) it is possible to join.

(2) Finishing of hot rolling The rolling is usually carried out by six to seven rolling mills, and the bonding strength is required in the rolling mill in the subsequent stage where tensile rolling is required. According to experiments by the inventors and the like, when the hot bar material can be joined before and after 20% in the plate thickness direction, it is assured that the hot bar material is joined over all the plate thicknesses of the bar material by the subsequent rolling. This indicates that in case of the bar material for continuous rolling, it is not necessary to completely join the joint surface.

Next, Example 1 of the joining method of this invention is demonstrated by FIG.

In FIG. 1, 1 is a leading bar material, 2 is a trailing bar material, and the surface of the rear end surface 1e of the preceding bar material 1 and the front end surface 2e of the trailing bar material 2 are exaggerated in thickness, respectively. Oxidation scales 1S and 2S are formed. The rear end face 1e of the leading bar material 1 and the front end face 2e of the trailing bar material 2 are both cropped and cut in advance with a daytime shear, not shown. The generation of oxidation scales 1S and 2S at (1e) and tip end surface 2e is unavoidable. The temperature of the bar materials 1 and 2 at this time is difficult about 1000 degreeC in steel, and 450 degreeC in aluminum.

The rear end of the preceding bar 1 is inclined with respect to the trailing bar 2, and the preceding bar 1 waits with the rear end 1e inclined by an angle of θ with respect to the vertical plane. As shown in FIG. 1 (a), the lower end of the front end face 2e of the trailing bar material 2 is erected vertically by e rather than the lower end of the rear end face 1e of the preceding bar material 1, and the leading bar material 1 ) To the rear end face 1e. Then, the trailing bar material 2 is pushed down in the vertical direction with a force of Q.

The state in the middle of a pressing process is shown in FIG.1 (b). As can be seen from this figure, since the rear end face 1e is inclined at θ only about the front end face 2e, when the trailing bar material 2 is forcibly pushed down by the force Q, the front end face 2e becomes It is pushed down toward the end face 1e. As a result, relative slippage occurs due to the pressing down between the both end faces 1e and 2e, while the front end face 2e faces the rear end face 1e, and a pressure P is generated by the wedge effect. The pressing force and plastic deformation occur between the two end surfaces 1e and 2e by the pressure P. Here, the contact surfaces of both end faces 1e and 2e peel off the oxide scales 1S and 22S of the surface by plastic deformation and relative slippage due to pressure P to expose the bottom metal surface and at the same time to the pressure P. By the compression force and plastic deformation by this, it becomes a state suitable for joining.

The end state of pressing is shown in FIG. 1 (c). When the trailing bar material 2 is pressed down until the misalignment of e is eliminated, the thickness portion of h is joined. Here, if the horizontal shift between the lower end of the front end face 2e of the trailing bar member 2 and the lower end of the rear end face 1e of the preceding bar member 1 before pressing down is x, the front end face of the trailing bar member 2 is x. The plastic deformation amount of (2e) and the rear end surface 1e of the preceding bar material 1 is about x / 2 at maximum, respectively. By the following rolling process, the ratio with respect to the plate | board thickness H of the joining area | region h increases. In addition, even when the oxidation scales 1S and 2S are not completely removed by the relative slip between the cross sections, even when the entire region of h is not bonded, the bonding strength that can withstand the rolling of the next step is sufficiently obtained.

[Other Embodiments of Joining Method]

A bonding method according to another embodiment of the present invention will be described with reference to FIGS. 2 to 4. In the above embodiment, the cross section 1e of the preceding bar material 1 is inclined by the angle θ with respect to the vertical plane, but the same action is obtained by the other embodiments of FIGS. That is, in Example 2 shown in FIG. 2, the preceding bar material 1 inclines the direction of the force Q so that the trailing bar material 2 may be pressed against the preceding bar material 1 by tilting the direction of the force Q so as not to incline. Is pressed by tilting θ. Similarly, relative slippage, compressive force, and plastic deformation are caused by the wedge effect, so that the preceding bar material 1 and the trailing bar material 2 are joined to each other. In this embodiment, if the amount of movement in the horizontal direction (plate longitudinal direction) of the trailing bar material 2 is x, the joining line is formed at a position of approximately x / 2 so that the leading end face 2e and the leading bar material 1 of the trailing bar material 2 are formed. The amount of plastic deformation of the rear end face 1e of) is at most approximately x / 2.

Furthermore, the cross sections 1e and 2e of the bar materials 1 and 2 may be slid from each other while pressing the bar materials 1 and 2 with a force of F to each other without inclining the direction of the force Q by θ, Also by this, the trailing bar material 2 can be inclined by θ with respect to the preceding bar material 1 and press-moves to obtain the same effect.

Moreover, in Example 3 shown in FIG. 3, one bar material 1 is bent to a radius r before joining with 0 point as a point, and after pushing the other bar material end surface to this, the force Q is acted on, Extend its bending. Similarly, relative slippage, compressive force, and plastic deformation are generated by the wedge effect, thereby obtaining the same effect. In this case, assuming that the maximum overlap length of both bar materials in the case where the bending of the preceding bar material 1 is extended without the plastic deformation of the rear end face 1e is x, the joining line is formed at a position of approximately x / 2 to form the trailing bar material 2 The plastic deformation amounts of the front end face 2e and the rear end face 1e of the preceding bar member 1 are at most approximately x / 2, respectively.

In the fourth embodiment shown in FIG. 4 again, each cross section 1e, 2e of the preceding bar material 1 and the trailing bar material 2 is inclined and cropped by θ with respect to the vertical direction, and the trailing bar material 2 is placed in the vertical direction. Press down with the power (Q). Similarly, relative slippage, compressive force, and plastic deformation are generated due to the wedge effect, whereby the preceding bar material 1 and the following bar material 2 are joined to each other. Also in this method, when x is a horizontal shift between the lower end of the front end face 2e of the trailing bar member 2 and the lower end of the rear end face 1e of the preceding bar member 1 before pressing down, the joint line is approximately x / 2. And the plastic deformation amount of the leading end face 2e of the trailing bar material 2 and the trailing end face 1e of the preceding bar material 1 is at most approximately x / 2, respectively.

In addition, the above embodiment relates to the case of joining the bar material after the initial rolling, but before the final rolling, in the case of slab material thicker than the bar material, when the cross section of the slab material is inclinedly cut by the gas cutting machine of the continuous casting equipment, the present invention is similarly joined. It is possible.

Further, in the above embodiment, the sliding direction of the end faces 1e and 2e serving as mutual joint surfaces at the time of joining the preceding bar material 1 and the trailing bar material 2 is the direction of the plate thickness H, but the direction of the plate width W. The same joining is also possible by sliding the plate thickness H and the plate width W in both directions. In particular, the embodiments of FIGS. 2 and 4 are suitable for joining by sliding in the direction of the plate width W, as shown in the figure. In the case of sliding in the plate width direction as described above, the sliding stroke is much larger than the sliding in the plate thickness (H) direction, so the peeling effect of the oxide scales 1S and 2S is large, and at the same time, the friction and deformation caused by the relative slipping are caused. The heat generated also increases. Therefore, this embodiment is particularly useful for joining materials having poor bonding properties or bar materials having relatively low temperatures. In this method, however, it is necessary to leave the center of the path of the bar materials 1 and 2, and the shifting device of the bar materials 1 and 2 is added. In addition, the surface length of the table roller for transferring the bar material must also be extra wide. Therefore, in this case, the sliding method in the plate thickness direction which does not accompany such a disadvantage is preferable.

In addition, in any of the above embodiments, the upper and lower edge portions of the front and rear end surfaces of the bar materials 1 and 2 are deformed at right angles or near to each other so that the edges of the bar materials 1 or 2 face each other in the case of relative sliding between sections. The digging effect and the peeling effect of the bar materials 1 and 2 also increase, so that the joining becomes more reliable. In order to do this, the cropped cuts of the front and rear end surfaces of the bar materials 1 and 2, which are made before joining, are cut with a guillotine sheer or parallel link sheer or pendulum with the upper and lower blades rising and falling in parallel so that the cutting plane is perpendicular. desirable.

Next, an embodiment of a bonding apparatus of the present invention for carrying out the bonding method will be described with reference to the drawings.

First, the bonding apparatus according to the first embodiment of the present invention will be described with reference to FIGS. 5 and 6.

5, the continuous hot rolling facility according to the present embodiment includes a continuous casting machine 51, a heater 52, a primary rolling mill group 53, a shearing machine 60, a bonding machine 3, and a finishing rolling mill group 54. The cooling furnace 55, the shearing machine 56, and the web machine 57 are arrange | positioned in this order. In the continuous casting machine (51), slab material having a plate thickness of 120 to 300 mm and a plate width of 700 to 2000 mm is manufactured, and the slab material is rolled into a bar material having a plate thickness of 30 to 50 mm in the primary rolling mill group 53, and in the finish rolling mill group 54. It is rolled into sheet products with sheet thickness of 1 ~ 12mm. The shearing machine 60 generally cuts the crops at the front and rear ends of the bar material supplied to the finishing rolling machine group 54 to improve the dentability, but in the present embodiment, the shearing machine 60 and the finishing rolling machine group 54 The shearer 60 is used to crop-cut the front and rear ends of the bar material joined by the joining machine 3 by arranging the joining machine 3 between. The shearing machine 56 cuts the thin plate product wound on the web machine 57 to form a product coil.

The structure of the adapter 3 is shown in FIG. The adapter 3 is comprised as an apparatus which implements the joining method shown in FIG. In FIG. 6, 1a is the rear end of the preceding bar material 1 rolled in the finish rolling mill group 54 after the initial rolling, and 2a exits the primary rolling mill group 53 and is cropped by the shearing machine 60. The tip end of the trailing bar material 2 is shown. The jointer 3 has a main body frame 3a, and a pair of upper and lower clamp dies 4 and 5 for clamping the front and rear ends 1a and 2a of the bar materials 1 and 2 in the main body frame 3a. And a pair of upper and lower press molds 6 and 7 are arranged.

The clamp dies 4 and 5 are molds which incline and pinch the rear end portion 1a of the preceding bar material 1 for carrying out the joining method shown in FIG. In order to prevent the horizontal force of the top, it is desirable to apply the top irregularities on the surface. This also helps to prevent cooling of the bar end. The upper die 4 is configured to be capable of lifting up and down in the hydraulic cylinder 8 so as to be opened at the time of passage of the bar material.

The pressing dies 6 and 7 are configured to move up and down by the cylinders 9 and 10, respectively. The double upper mold 6 is a mold for imparting a pressing force, and the lower mold 7 has a role of preventing the bar material from deviating in the horizontal direction when the position of the tip of the bar is maintained and pressed.

On the inlet side of the main body frame 3a, the position adjusting device 14 for adjusting the height direction position of the front-end | tip part of the following bar material 2 is provided. The position adjusting device 14 has an inner housing 13 for accommodating the pinch rollers 11 and 12 and the pinch rollers 11 and 12, and the inner housing 13 is gripped by the pinch rollers 11 and 12. In order to adjust the height direction position of the front end of the following trailing bar material 2, it is comprised so that the inside of the outer housing 14a can be elevated by the hydraulic cylinder (21).

15 is a table roller. In this embodiment, even when the bar material is not bonded, the heights of the table rollers 15 before and after the joining machine are the same and at the same time as the equipment without the joining machine. For this reason, the table roller 15 at the inlet side is lower than the height at which the bar material 2 is clamped in the molds 6 and 7, so that the position adjusting device 14 is moved to move the bar material 2 to the required height at the time of joining. I install it. In addition, in the dedicated equipment for joining the bar material, the position adjusting device 14 is unnecessary if the table roller 15 on the inlet side is installed at a height that enables the bar material 2 to be held in the molds 6 and 7. .

The position sensor 16 which detects the passage of the front end or the rear end of the bar materials 1 and 2 is provided in the inlet side of the bonding machine 3, and the measuring roller 17 which detects the moving speed of a bar material in the exit side of the bonding machine 3; ) Is installed. The position sensor 16 and the measuring roller 17 can know the end positions of the bar materials 1 and 2.

The splicer 3 is capable of traveling in the advancing direction of the bar material by the transfer device 18. The conveying apparatus 18 has the traveling wheel 18a provided in the main body frame 3a, and the traveling wheel 18a reciprocates on the rail 19 by the drive of the hydraulic cylinder 20. As shown in FIG.

The operation of the bonding apparatus will be described below.

When the preceding roll 1 passes through the splicer 3, the upper molds 4 and 6 are in the open position ascending from the position shown, and the lower mold 7 is waiting at the position shown. When the rear end 1a of the preceding bar 1 passes through the position sensor 16, the measuring bar 17 calculates the position of the rear end 1a of the preceding bar 1 by using the measuring roller 17. When the end face 1e of is at the position immediately before the clamping dies 4 and 5, the hydraulic cylinder 8 is operated to clamp the rear end 1a of the preceding bar member 1 by the clamping dies 4 and 5. do. At this time, the rear end 1a of the preceding bar material 1 is bent so that the end surface 1e may have a predetermined angle with respect to the vertical direction by the clamp of the metal mold | die 4 and 5 (refer FIG. 1). Immediately before the molds 4 and 5 are clamped, the splicer 3 is accelerated to a speed substantially equal to the speed Vd of the bar material 1 by the driving of the hydraulic cylinder 20. The hydraulic cylinder 20 is configured to maintain the relative relationship between the calculation position of the rear end portion 1a of the bar material 1 and the position of the adapter 3 by a position sensor omitted in the drawing shown in the traveling direction of the adapter 3 at a predetermined value. Is achieved by controlling the position of the piston.

The trailing bar material 2 is sent close to the preceding bar material 1 so that the end surface 2e of the tip thereof is detected by the position sensor 16, and the tip of the bar material 2 passes through the pinch rollers 11 and 12. The rear bar material 2 is pushed up to a predetermined height by the cylinder 21 so that the end faces 1e and 2e formed at the ends 1a and 2a of the both bar materials 1 and 2 are cross-sectional in a staggered state as shown. The lower edge portion of 2e contacts the end face 1e. The contact may be confirmed using a change in the current of the drive motors of the pinch rollers 11 and 12 or the speed Ve of the trailing bar material 2 and the position sensor 16. Immediately after confirmation, the hydraulic cylinder 9 is operated to press the upper mold 6 so that the joining thereof until the end face 2e of the trailing bar material 2 does not cross the end face 1e of the preceding bar material 1. Press the surface. At this time, the cylinder 10 is pressed at a predetermined pressure. In this way, the joining of both bar materials 1 and 2 is instantaneously caused by the crushing removal of the oxide scale formed on the joint surfaces of both end faces 1e and 2e and the strong compressive force and plastic deformation caused by the wedge effect of the joint face. Is done.

As soon as the cylinder 9 achieves the desired stroke, the piston of the hydraulic cylinders 8 and 9 rises, and the piston of the cylinder 10 descends to move the molds 4, 6 and 7 to the bar 1 and 2; After separation from the adapter 3 is returned to the original position by the hydraulic cylinder (20). Further, the inner housing 13 is also lowered and provided for joining the next bar material.

Example 2 of Bonding Device

The bonding apparatus by Example 2 of this invention is demonstrated by FIG. This embodiment has the same bonding principle as the embodiment of FIG. 6, but does not require the position adjusting device 14, thereby simplifying the structure and operation. In the figure, the same code | symbol is attached | subjected to the member equivalent to the member shown in FIG.

In FIG. 7, the height of the upper surface of the lower die 7 for pressing is approximately the same as that of the table roller 15, so that the height of the tip portion 2a of the trailing bar material 2 does not change during joining. On the other hand, the height of the upper surface of the lower mold 5 for clamping is set lower than the height of the table roller 15 so that when the preceding bar material 1 is clamped by the clamping molds 4 and 5, Incline the end 1e and at the same time lower its vertical position level by the required amount. As the plate thickness of the bar material increases, the lowering amount of the bar material 1 needs to be increased. For this purpose, the wedge nails 22 which are allowed to enter at right angles to the ground are installed, and the height of the upper surface of the mold 5 is increased to the thickness of the bar material. Adjust accordingly.

In the adapter 3A of the present embodiment configured as described above, the preceding bar member 1 is sent to the adapter 3A while the front end surface 2e of the trailing bar member 2 is brought into contact with the rear end surface 1e of the preceding bar member 1, When the end face 1e of the rear end of the preceding bar material 1 comes to the position of the clamping dies 4 and 5, the upper mold 4 is lowered to clamp the preceding bar material 1, and at the same time, the pressing die 6 To lower. By the clamp of the upper mold 4, the rear end surface 1e of the bar material 1 is inclined and pressed downward. As the pressing die 6 is lowered, the end face 2e of the trailing bar material 2 is crushed and removed from the surface of the bottom end part 2 as the bottom part of the bar material 1 is cut into the end face 1e of the bar material 1, At the same time, it is crimped together by pressing and plastic deformation due to the wedge effect. In addition, the bonding machine 3A travels synchronously to the bar material by the hydraulic cylinder 20 immediately before the clamp, and returns to the original position after the mold opening.

In this embodiment, since it is not necessary to adjust the height of the bar material 2 on the inlet side of the bonding machine 3A, the trailing bar material 2 is made faster by the speed of the table roller 15 than Vd which determines the finishing rolling speed. By sliding (2) with respect to the table roller 15, it feeds into the joining machine 3A, contacting the rear end surface 1e of the preceding bar material 1 to the front end surface 2e of the following bar material 2, and both bar materials. The joining operation of (1, 2) is simpler, and the work can be finished in a short time.

Example 3 of Bonding Device

The bonding apparatus by Example 3 of this invention is demonstrated by FIG. In the figure, the same code | symbol is attached | subjected to the member equivalent to the member shown in FIG. The bonding machine 3B of this embodiment is comprised as an apparatus which performs the joining method of FIG. That is, in this embodiment, instead of inclining the ends of the bar materials 1 and 2, the main frame 3a of the jointer 3B is inclined, and at the same time, the clamp molds 4 and 5 and the pressing molds 6 and 7 are inclined. The surface of the die faces in the horizontal direction, and the pressing dies 6 and 7 incline the moving direction to the bar end surface. Thereby, the joining method shown in FIG. 2 is implemented and the bar materials 1 and 2 are joined.

[Example 4 of the bonding apparatus]

The joining apparatus by Example 4 of this invention is demonstrated with reference to FIGS.

In Fig. 9, the splicer 3C of the present embodiment has a main body frame 3a as a main body of the adapter, and an image for sandwiching the front and rear ends 1a and 2a of the bar materials 1 and 2 in the main body frame 3a. The lower pair of clamp dies 4 and 5 and the upper and lower pair of pressing dies 6 and 7 are arranged.

In addition, the bonding machine 3C of the present embodiment has a first mold frame 23 and a second mold frame 24 in the main body frame 3a. The lower mold 5 for the clamp is integrally installed in the first mold frame 23, and at the same time, the upper mold 4 for the clamp is lifted by a plurality of hydraulic cylinders 26 as shown in FIG. It is connected. Similarly, the lower die 7 for pressing is integrally provided in the second mold frame 24, and at the same time, as shown in FIG. 11, the upper die 6 for pressing can be lifted by a plurality of hydraulic cylinders 27. Is connected. Upper and lower brackets 3c and 3d protrude from the upper and lower frames of the main frame 3a, and the mold frame 23 has a plurality of hydraulic cylinders 8 with respect to the upper and lower brackets 3c and 3d. It is supported so that lifting is possible. The mold frame 24 is supported by the plurality of hydraulic cylinders 9 so as to be lifted and lowered. In addition, one end of the upper and lower pairs of links 21 and 22 of the inclination angle α is connected to the upper and lower brackets 3c and 3d by connecting pins 25a and 25d, respectively. The other end of the second mold frame 24 is connected to the connecting pins 25b and 25c by the upper and lower bras 3c and 3d, the links 21 and 22 and the connecting pins 25a to 25d and the second. A quadrilateral link is formed by the mold frame 24 of the mold, and the first and second mold frames 23 and 24 are operatively connected to each other. The lower limit of the first mold frame 23 is given to the stopper 28, and the lower limit of the second mold frame 24 is given to the stopper 29.

The lower mold 5 for the clamp among the clamping dies 4 and 5 and the pressing dies 6 and 7 is a part of the rear end portion 1a of the preceding bar material 1 and the tip portion 2a of the trailing bar material 2. The upper mold 6 for pressing has a length capable of supporting a portion of the leading end 2a of the trailing bar 2 and the rear end 1a of the preceding bar 1, Correspondingly, the other molds 4 and 7 are shortened to a length capable of supporting the remainder of the rear end 1a of the preceding bar material 1 and the remainder of the front end 2a of the trailing bar material 2, respectively.

Moreover, the conveying apparatus 18 is provided in 3 C of bonding machines. The conveying apparatus 18 has the traveling wheel 18a installed in the main frame 3a, and the splicer 3C is driven by the hydraulic cylinder 20 on the rail 19 by the traveling wheel 18a. It reciprocates in the direction of the ash path. The bonding machine 3C accelerates to a speed almost equal to the speed Ve of the bar material 1 by the transfer device 18, and performs the joining operation of the bar materials 1 and 2 during the traveling.

The joining operation by the bonding machine 3C will be described with reference to FIG. First, the rear end portion 1a of the preceding bar member 1 and the front end portion 2a of the trailing bar member 2 are respectively sheared by a shearing machine 60 (see FIG. 5) disposed immediately before the bonding machine 3C. The splicer 3C is accelerated to a speed approximately equal to the speed Ve of the preceding bar material 1 by the transfer device 18, and joins the bar materials 1 and 2 during travel. The bar materials 1 and 2 fit the cross section at a predetermined position on the lower mold 5 for clamping the joining machine 3C. Next, the cylinders 26 and 27 are operated to press down the clamp upper mold 4 and the press upper mold 6 to close the clamp. Next, the cylinder 8 is operated to push down the first mold frame 23 to give a step a in the plate thickness direction between the cross section of the preceding bar material 1 and the cross section of the trailing bar material 2. Next, the cylinders 9 are operated to press the second mold frame 24 down by a distance equal to the step a by a force equal to Q to join the bar materials 1 and 2. Next, the cylinders 26 and 27 are operated to raise the mold 4 and the mold 6 to open the clamp. Next, the bar material joined by the lifting device of the bar material not shown is lifted to the upper surface of the metal mold | die 5, 7, and is conveyed to the rolling mill arrange | positioned downstream. The joining machine 3C prepares for joining of the next bar material by immediately returning to the original position by the feeder 18 when a series of joining procedures are completed.

In the above joining operation, in the order of "joining", the second mold frame 24 is pressed down by the predetermined stroke by the cylinder 9, so that the pressing dies 6 and 7 are clamped by the action of the links 21 and 22. Is moved in an inclined direction toward the molten mold 4, 5 to generate relative slippage between the cross section of the rear end portion 1a of the preceding bar member 1 and the cross section of the front end portion 2a of the trailing bar member 2; At the same time, the pressing force in the horizontal direction is generated between the end faces of the bar members 1 and 2 by the wedge effect, so that both end faces are pressed to plastic deformation so as to be in a state suitable for joining. That is, due to the relative sliding between the two end faces and the pressing force along the plastic deformation, the oxidized scale of the cross-sectional surface of the both bar materials 1 and 2 is peeled off to expose the bottom metal surface, and at the same time, the exposed metal surfaces are pressed together. The bar materials 1 and 2 are reliably joined in a short time.

On the other hand, the horizontal force F generated by the wedge effect is prevented by the links 21 and 22 and the connecting pins 25a, 25b, 25c, and 25d and does not act on the longitudinal member of the main frame 3.

13 shows details of the step sequence and the joining sequence. The rear end 1a of the bar material 1 sandwiched by the clamp molds 4 and 5 is pressed into the pressing molds 6 and 7 by pressing down the first mold frame 23 by a predetermined stroke into the cylinder 8. A step a is given in the direction of the thickness t of the tip portion 2a of the sandwiched bar material 2. Next, by pressing the second mold frame 24 with the cylinder 9 by a predetermined stroke, the tip end portion 2a of the bar material 2 held by the pressing dies 6 and 7 faces the cross section of the bar material 1. By moving in an inclined direction, the two end surfaces of the bar material are pressed together to be plastically deformed, and are slid together. Here, when x is the short axis length of the plate length direction at the both ends at the time of press bonding, a joining line is formed in the position of about x / 2, and it becomes the amount of plastic deformation, ie, the crimp amount which x contributes to joining. The crimping amount x has an optimum value corresponding to the bar thickness t of the bar material, and when the bar thickness of the bar material becomes thick, it is necessary to increase the crimping amount x.

The operation of the link mechanism in the joining procedure will be described with reference to FIG. The first mold frame 23 and the second mold frame 24 constitute a quadrilateral link by the links 21 and 22 and the connecting pins 25a to 25d. The position of the connecting pin (point) of the quadrangle link is shown as A ₁ , B ₁ , C ₁ , and D ₁ in FIG. 14, and the second mold frame 24 is pressed by the step a to rest the bar (1, The position of the connecting pin of the quadrilateral link at the time of obtaining the crimp amount (x) of 2) is represented by A ₁ , B ₂ , C ₂ , and D ₁ . When the quadrilateral links A ₁ , B ₁ , C ₁ , and D ₁ form a parallelogram, the step amount a is represented by the following formula (1), and the crimped amount x is represented by the following formula (2). Is saved.

a = r (sin θ ₂ -sin θ ₁ ). … … … … … … … … … … … … … (One)

x = r (cos θ ₁ -cos θ ₂ )

= a (cos θ ₁ -cos θ ₂ ) / (sin θ ₂ -sin θ ₁ ). … … … … (2)

From here,

θ ₁ : Angle of inclination of link A ₁ B ₁ and link C ₁ D ₁ after stepping

θ ₂ : Angle of inclination of link A ₁ B ₂ and link C ₂ D ₁ after completion of joining

r: effective length of link (21, 22)

FIG. 15 shows the relationship between the step amount a and the crimp amount x according to the formula (2).

As can be seen from this figure, it can be obtained by adjusting the amount of compression (x) that is most suitable for the plate thickness t of the bar material.

Next, an operation based on the characteristics of the shapes of the clamping dies 4 and 5 and the pressing dies 6 and 7 of the present embodiment will be described with reference to FIG. When the bar materials are joined together and continuously rolled by the finishing rolling mill, in practice, a backup for preventing separation of the joints can be obtained until the joined bar materials are transferred to the rolling mill.

In this embodiment, as described above, the length of the lower mold 5 for clamping and the upper mold 6 for pressing is a part of the tip 2a of the trailing bar 2 of the rear end 1a of the preceding bar 1, respectively. And an end portion 2a of the trailing bar member 2 and a part of the rear end portion 1a of the preceding bar member 1 so as to support the overhang structure. As a result, the molds 5 and 6 during the joining of the bar materials 1 and 2 penetrate both sides of the bar materials 1 and 2 beyond the joining line H as shown in FIG. 16 (a). Deflection (F, G) of the cross section of the bar material shown in FIG. 16 (b) which arises in the case can be prevented. In addition, according to a test by the inventors of the present application, the bonding line in the plate thickness direction of the bar material is curved like H, and thus the bonding strength is also increased.

As described above, according to the present embodiment, since the horizontal force F generated by the wedge effect during pressing is supported by the links 21 and 22 and the connecting pins 25a to 25d, the main body frame of the splicer 3C. No strong force is exerted on (3a), and the device can be miniaturized. In addition, since there is no mechanical perturbation portion between the first and second mold frames 23 and 24 and the main body frame 3a at the time of pressing, the mechanical pins are reduced because the support pins 25a to 25d are supported instead. It also has the advantage of reducing the output of.

Further, by adjusting the step amount a in the plate thickness direction of the preceding bar material and the following bar material, the crimp amount x most suitable for the plate thickness t of the bar material can be obtained.

In addition, since the lower mold 5 for clamping and the upper mold 6 for pressing have an overhang structure, sagging of the joint can be prevented, and at the same time, the joining line in the plate thickness direction of the bar becomes curved, and the joint of the bar is subsequently transported. And sufficient bonding strength to withstand without rolling during rolling.

[Example 5 of bonding apparatus]

Example 5 of this invention is demonstrated with reference to FIGS. 17-24. In the drawings, the same members as in the embodiment shown in FIG. 9 are assigned the same reference numerals.

In FIGS. 17 and 18, in the splicer 3D of this embodiment, the first mold frame 23 and the second mold frame 24 are connected to the links 21 and 22 and the same as in the fourth embodiment. The pins 25a to 25d form a quadrilateral link. However, in the present embodiment, the lower bracket 3d on which the connecting pin 25d is mounted is configured as a part of the movable frame 40 which can be elevated, and the movable frame 40 is connected to the motor 41 and the worm reducer 42. By operating up and down by adjusting the position of the connecting pin (25).

19 to 21, the bar lifting members 44 are assembled on the upper surfaces of the lower molds 5 and 7 so that the plurality of hydraulic cylinders 43 can be lifted and lowered. A plurality of guide rolls 45 are provided in the bar lifting member 44 to smoothly convey the bar materials. The bar lifting member 44 sinks from the upper surfaces of the lower molds 5 and 7 during the joining of the bar material. When the upper molds 4 and 6 rise after the end of the joining, the bar lifting member 44 immediately It raises and the bar materials 1 and 2 are lifted from the upper surface of the lower metal mold | die 5 and 7. As shown in FIG. This bar lifting device 44 is particularly effective when using a metal mold with an uneven mold surface because the joining portion of the bar material is less likely to penetrate into the mold surface and fall off from the mold.

As shown in FIG. 21, the first mold frame 23 and the second mold frame 24 are connected by a plurality of hydraulic cylinders 46 and pins 47 and 48. As shown in FIG. The hydraulic cylinder 46 gives pressurization to the direction of the load acting on the links 21 and 22 to absorb the margin of the link mechanism constituted by the links 21 and 22 and the connecting pins 25a to 25d.

The operation of the link mechanism of this embodiment will be described with reference to FIGS. 22 to 24. FIG.

In Fig. 22, a quadrilateral link composed of connecting pins 25a to 25d when the connecting pin 25d is displaced y upwards from the reference position D ₁ is A ₁ , B ₁ , C ₁ , and D _2. From this state, the quadrilateral link at the time of pressing the second mold frame 24 by the step amount a to obtain the crimp amount x ₃ of the bar materials 1 and 2 is A ₁ , B ₂ , Represented by C ₂ , D ₂ . The crimp amount (x ₃ ) at this time is geometrically calculated | required by following formula (3).

x ₁ = r (cos θ ₁ -cos θ ₂ )

x ₂ = r (cos θ ₃ -cos θ ₄ )

x ₃ = (x1 + x1) / 2

= (r / 2) ｛(cos θ ₁ -cos θ ₂ ) + (cos θ ₃ -cos θ ₄ )｝. … (3)

From here

θ ₃ : Inclination angle of link C ₁ D ₂ after stepping

θ ₄ : Inclination angle of link C ₂ D ₂ after completion

x ₁ : displacement amount from point B ₁ to B ₂ after pushing down dimension (a)

x ₂ : displacement amount from point C ₁ to C ₂ after pushing down dimension (a)

x _3: (and the center point of the length L ₁ from the length of the junction E ₁ E ₁ is a line segment B ₁ C _1.) dimensions (a) pressing on the amount of displacement from the point E ₂ E ₁ after the descending of

23 and 24 show the relationship between the vertical position y of the connecting pin 25d (point D ₁ ) and the crimp amount x. As can be seen from these figures, the most suitable crimping amount x in the case where the step difference a of the bar material is made constant is obtained by adjusting the vertical position y of the connecting pin 25d (point D ₁ ). Can be. That is, when the point D ₁ is raised from the reference position to increase the inclination angle of the link 22 (component C ₁ D ₁ ), the amount of crimp x becomes large, and conversely, the point D ₁ is lowered to lower the link ( When the inclination angle of 22) is made small, the amount of crimp x becomes small.

As described above, according to the present embodiment, by adjusting the position of the connecting pin 25, the amount of crimp can be adjusted according to the shape of the bar plate thickness and the shape of the cross section bent.

In addition, even when the joint part of the bar material is dug into the mold surface by using the mold surface with concavities and convexities, it is possible to smoothly convey the joint part of the bar material by lifting the joint part of the bar material.

In addition, even if there is a gutter in the supporting structure of the mold apparatus, the gutter can be absorbed to prevent a decrease in the pressing amount of the bar material, thereby securing the bonding strength of the bar material.

In addition, in the above embodiment, the amount of crimp is explained by adjusting the connecting pin 25d by moving in the vertical direction, but it goes without saying that the amount of crimp can be adjusted by moving the connecting pin 25d in the horizontal and inclined directions. . Also, by using the connecting pin as an eccentric attachment pin, the same effect can be obtained with a simple mechanism. In addition, the structure is slightly complicated, but the amount of compression can be adjusted even if the position of the other connecting pins (25a to 25c) can be adjusted in the same way. Moreover, although the parallelogram link was demonstrated typically, the length of the link 21 and the link 22 is changed, or the space | interval dimension of the connecting pins 25a and 25d with respect to the 1st metal mold frame 23 is made into the 2nd metal mold frame. The amount of crimp can also be changed by making the structure change by the space | interval dimension of the connection pin 25b, 25c of (24).

[Example 6 of Bonding Device]

Embodiment 6 of the present invention will be described with reference to FIGS. 25 and 26. FIG.

In FIG. 25, the first mold frame 23 is supported by the hydraulic cylinder 8 so as to be lifted and lowered. Given to the gin stopper 70, the gradient stopper 70 is adjusted through the drive motor and the worm reducer 71 (not shown). Similarly, the second mold frame 24 is supported by the hydraulic cylinder 9 so as to be lifted and lowered, and a lower limit thereof is given to the gradient stopper 72 and the gradient stopper 72 is a driving motor and a worm reducer (not shown). Access is controlled via 73). By adjusting the amount of entrance and exit of the gradient stoppers 70 and 72, adjustment of the step amount of the bar material 1 and adjustment of the amount of pushing down of the bar material 2 can be performed easily.

In addition, a servovalve 74 is connected to the hydraulic cylinder 9, and the second mold frame is applied by the servovalve 74 and the hydraulic cylinder 9 to oscillate finely (about 100 Hz) in various waveforms. (24) is pushed down and micro vibration is applied to the trailing bar material 2 in the cross-sectional direction.

FIG. 26 shows the joining time t and the mold pressing stow when the pressing force Q is applied while applying vibration to the trailing bar material 2 held by the molds 6 and 7 of the second mold frame 24. The relationship between the lock S and the pressing force Q is shown. The bar material is pressed down while applying micro vibration as described above by the servovalve 74 and the hydraulic cylinder 9 during the joining to complete the joining.

Next, the vibration of the bar material is stopped to hold the bar material in a state where the pressing pressure Q is maintained.

According to a test by the inventors of the present invention, it was confirmed that sufficient bonding strength was obtained by applying a micro vibration with a thickness of 40 mm of a bar plate and a pressing speed of 100 mm / sec, a joining time t of 0.4 sec, and then maintaining about 1 sec. Further, the microscopic shaking may be applied to the first mold frame 23 or may be applied to both the first and second mold frames 23 and 24. In addition, fine vibration may be added by applying an ultrasonic wave.

According to this embodiment, it is possible to easily adjust the step amount in the plate thickness direction of the preceding bar material and the following bar material and to adjust the amount of depression of the second mold frame 24 corresponding to the plate thickness of the bar material. Further, by applying the microscopic vibration and the pressing force Q, the pulverization and dispersion of the surface oxidation scale at the joining portion of the bar material are promoted, and the joining strength can be added.

In addition, in the embodiment of FIGS. 9 to 26, the mold of the first mold frame is used as a clamp mold, and the step is pushed down (pressed down) to the preceding bar material 1, and then the mold of the second mold frame is pressed. The second bar frame 2 is pushed down and joined, but on the contrary, the first mold frame is pushed up to give a step, and the second mold frame is pushed up and joined to obtain the same effect. The same effect can also be obtained by pressing down the mold of the first mold frame as the pressing die and giving the step of the mold of the second mold frame as the clamp die. In addition, one of the first mold frame and the second mold frame is lifted to apply pressure, but the first mold frame and the second mold frame are moved so that the bar material 1 and the bar material 2 generate relative slip. Bonding can be performed similarly even if they are raised or pressed in opposite directions.

Another Example

Next, the Example which further ensures joining by the joining method of this invention is described. When the bar material is joined and continuously rolled, in actual operation, a backup is required to prevent the joint from breaking due to vibration of the bar material (plate thickness direction and plate width direction) during conveyance until the joined bar material is fed into the rolling mill. In this embodiment, projections of a predetermined pattern are provided on the surfaces of the clamp mold and the pressing mold to make the joining line zigzag to prevent breakage by vibrating the vibration of the bar material during conveyance.

That is, in FIG. 27, a plurality of spike-like protrusions 30 are formed on the surface of the clamping die 5A and the surface of the pressing die 6A facing the clamping die 5A. As shown in FIG. 28, this projection 30 is circular in cross section and is arranged in a zigzag shape with respect to the joining line in the plate width direction of the cross section of the bar material. Since these upper and lower protrusions 30 dig into the bar material, the joint surface is strongly blown out to the counter bar material side, and thus the joining line 31 in the plate thickness direction is curved as shown in FIG. For example, even if the preceding bar material 1 shakes upward, the joint does not fall off. Moreover, since the projection 30 is arranged in a zigzag shape, the adjacent projection has a curve opposite to the curve shown in FIG. 27 (b), so that the joint does not fall even if the preceding bar 1 is shaken downward. On the other hand, also in the plate width direction, as shown in FIG. 28, since the joining line 32 is zigzag-shaped, it can endure the shake of the plate width direction.

In addition, in order to secure fracture resistance against such shaking, it is also important to carry out (compression force) transfer speed control to push the trailing bar material 2 against the preceding bar material 1 so that the tension in the plate length direction does not act on the joint portion. . In this way, when the first rolling mill is handed over, the joint is further strengthened by the rolling, so that the conditions to withstand the downstream tension rolling are provided.

In FIG. 28, the cross-sectional shape of the projection 30 is circular, but as shown in FIG. 29, a cross-sectional lozenge 33 may be provided, thereby exerting a circular effect in FIG. .

Another embodiment of the projection for zigzag joining line will be described with reference to FIGS. 30 to 32. FIG.

30 and 31, a plurality of rack-toothed projections 34 are formed on the surface of the clamping die 5B and the surface of the pressing die 6B facing it. This projection 34 is rectangular as shown in FIG. 32, and is arrange | positioned beyond the junction line 32 of the plate width direction. By joining these upper and lower protrusions 34 to the bar material, the joint surface is deformed, and the joint lines 31 and 32 as in the above-described embodiment can be obtained. In this case, the degree of the zigzag phase is reduced, but it is confirmed in the experiments of the present inventors that the effect of preventing breakage is effective.

Another embodiment for ensuring the bonding of the bar material will be described. First, in the embodiments of FIGS. 6 to 26, the lower mold 5 for clamping and the upper mold for pressing in the molds 4, 5, 6, and 7 are overlapped with each other such that the tip portions thereof face each other. Here, the pressing pressure is set so that the pressing die is dug into the bar material by the pressing pressure Q. As a result, as shown in FIG. 33 (a), the joining line in the plate thickness direction is corrugated to improve the joining strength against shaking (vibration) in the plate thickness direction. Moreover, cases where the plate thickness and plate width of the preceding bar material and the following bar material are the same are rare, but many different combinations exist. 33 (b) and (c) show the bonding state in the case where there is a difference in plate thickness in the present invention, but as described above, the pressing mold is made to penetrate into the bar by the pressing pressure Q. When the pressing force is set, the end fitting portion generated in the plate thickness difference is reduced and the transportation in the direction of the arrow can be avoided, resulting in a situation in which the joint step is caught and broken at the conveying table.

Moreover, as shown in FIG. 34 (a), when there is a plate width difference (W1 <W2) in the bar material, the narrowing example (W1) completes the bonding so as to dig into the wider example (W2) on the opposite side. Edge division in rolling can be avoided. On the other hand, as shown in FIG. 34 (b), in the case of the same plate width (W1 = W2), the same effect can be obtained by joining in a state consciously in the width direction by? W.

[etc]

Further, in the above embodiment, the sliding direction of the cross section of the bar material by the bonding machine is in the direction of the plate thickness (H) of the bar material, but as described in FIGS. 2 and 4, the relative slip may be generated in the direction of the plate width (W) of the bar material. In this case, the bonding machine becomes large, but the descaling effect is large because the sliding stroke of the contact surface of the bar material is large, and at the same time, the temperature rise due to the heat generated by the contact surface is increased by increasing the sliding speed, so that the temperature of the material or the bar material that is difficult to fracture the scale. Is low, and is effective.

In the above description, all of the bonding apparatuses are weekly type, but the fixing of the bonding machine is to install the looper device of the bar material on the outlet side for the joining time, or to combine them properly according to the given equipment conditions such as the combination of the daytime and the looper. Self-explanatory

In addition, although it demonstrated by the method of reciprocating with one cylinder as a week type | mold type | mold joint machine, acceleration of a splicer is performed by installing the push cylinder of a small stroke, and after synchronizing with the speed | rate of a bar material, a clamp force of a mold and a prior bar material are used. After traveling together and opening the clamp, a method such as returning to the original position with a return-only cylinder is also applicable, and is particularly effective for high-precision position control of the bar material.

Moreover, in the above Example, although the case where the bar material after primary rolling was joined was demonstrated, this invention can be similarly applied also to the joining apparatus which joins the slab before primary rolling.

Reference is made here to the junction time in the above examples. In the embodiment shown in FIG. 6, the clamp and the pressure act at the same time, assuming the stroke is 100 mm, and open for 1 second at a press speed of 100 mm / sec equally for 1 second, for example, acceleration (g) to 60 m / min. Accelerate to about 0.1 seconds, 2.1 seconds in total, 3 seconds is enough for safety. In the embodiment of Fig. 9, it is about 5 seconds. Further, in the above embodiment, since the deflection of the lower side is suppressed by the mold and does not occur, the processing therefor is unnecessary. If the current thickness of the bar material is 40mm, the thickness of the exit plate of the finish rolling mill group is 2mm and the rolling speed is 1200m / min, the inlet side speed Vd of the bar material is 60m / min, which is 1/20.

In the above embodiment, the joining time is 3 to 5 seconds, the traveling distance is 3 to 5 m, and the equipment configuration does not require the enlargement, which is very easy.

As described above, in the embodiment of the present invention, in a hot rolling facility such as a steel sheet or an aluminum plate, the bar materials are joined at the inlet side of the finish rolling mill group to be continuously rolled, and the joints of the bar materials are slid in the direction of digging each other. It is possible to bond the bar material in an instant by pressing force and plastic deformation between the two end faces due to the wedge effect while crushing and removing the oxidized scale of this cross section. Compared to the melting method, which has the prospect of joining the present, the welding time is shortened to about one tenth, and the hot rolling facility can realize the same degree of difference even if the driving stroke is within 25m to 5m even if the splicer is used as the weekly method and the looper method. Facility planning is possible.

As described above, the embodiment of the present invention can realize the continuous bonding of hot rolling, which has been a multi-year desire of the rolling industry, with a very simple structure and operation.

[Theorem of Effects]

As described above, according to the present invention, the following effects are obtained.

(1) Relative slip is generated between the two end faces while pressing the end faces of the trailing end of the preceding roll and the end of the trailing roll so as to plastically deform each other, so that both rolling materials can be reliably joined in a short time, so that continuous hot rolling can be performed. It can be realized.

(2) Since at least one of the rear end of the preceding rolled material and the leading end of the subsequent rolled material is moved relative to the other in the inclined direction with respect to the cross section of the other rolled material, the relative sliding and plastic deformation are involved in one operation. Both pressing can be performed.

(3) Since the joining surface of the preceding rolled material and the subsequent rolled material is deformed in a zigzag, separation during conveyance is prevented and stable continuous hot rolling is possible.

(4) Edge splitting can be prevented because the edges of one plate width direction of the preceding roll material and the subsequent roll material are bonded to the other plate width edge.

(5) The lateral force generated by the wedge effect is prevented by the link means when the positive rolled material is securely bonded in a short time by the pressure accompanied by the relative slip between the two end faces and the plastic deformation. Since it does not act on the longitudinal member of the main body frame, miniaturization of the bonding apparatus can be achieved. In addition, since there is no mechanical sliding part at the time of press bonding and instead it is supported at the point of the link means, the mechanical loss is small and the output of the first actuating means can be reduced.

(6) According to the plate thickness of the rolled material and the shape of the cross section bezel, it is easy to adjust the amount of crimp, the step amount and the amount of depression of the mold, so that automatic operation is possible.

(7) There is no sagging of the joint, and sufficient bonding strength can be obtained without difficulty in conveying and rolling the bar material.

(8) Even if the mold surface with unevenness is used, separation with the mold after joining is easy, and conveyance of a rolled material can also be made smooth.

(9) Since the presence of the link means is eliminated, accurate crimp amount can be adjusted to improve the reliability of the joining.

(10) Since the oxidation scale of the cross section of the rolling material can be sufficiently removed, the bonding strength increases.

(11) From the above, the effect of realizing the joining apparatus of the rolling material which is excellent in economy and operability in the hot rolling installation which enables the joining of the rolling material in a very short time is achieved.

Claims (29)

In the joining method of the hot rolling material which joins the preceding rolling material 1 and the following rolling material 2 in the line of a hot rolling facility, (a) the cross section 1e of the rear end part of the said preceding rolling material 1, and the said Abutting the end face 2e of the leading end portion of the trailing rolled material 2 in a state in which the end face of the rolling material is in either the plate thickness direction or the plate width direction, and (b) eliminating the gap between the end faces. Cross section of the rear end portion of the preceding rolled material by moving one of the rear end portion of the preceding rolled material 1 and the front end portion of the subsequent rolled material 2 relative to the other in an inclined direction with respect to the end surface of the other rolled material. And rolling both sides of each other by generating relative slip between the end faces while plastically deforming the cross-sections of the leading end portions of the trailing roll material and each other. The rear end of the preceding rolled material 1 and the tip of the trailing rolled material 2 are inclined with respect to the other, and the rear end of the preceding rolled material and the tip of the trailing rolled material are mutually inclined. At the same time, the other side is pushed and held to the other side, and then the relative slip and plastic deformation are generated by relatively moving one of the trailing end of the preceding rolled material and the leading end of the trailing rolled material in the direction of eliminating the gap. Joining method of the hot rolled material to be. 2. The rear end of the preceding rolled material (1) and the leading end of the following rolled material (2) are mutually spaced apart and pushed to one another to sandwich the other end of the preceding rolled material (1). A method of joining a hot rolled material, wherein the relative slippage and plastic deformation are generated by relatively moving one end of a trailing rolled material in an inclined direction with respect to the end face of the other rolled material. The method according to claim 1, wherein one of the trailing end of the preceding rolled material (1) and the tip of the trailing rolled material (2) is bent at the same time as the bent end is pushed to the other side, and then the bent end is squeezed. A method of joining a hot rolled material, characterized by generating relative slippage and plastic deformation. 2. A cross section of at least one of the trailing end of the preceding rolled material and the trailing rolled material 2 is obliquely cut, and the rear end and the leading end of the first rolled material 1 are deviated from each other, and the other end thereof is different. The relative rolling and plastic deformation are generated by relatively moving the rear end of the preceding rolled material and one end of the trailing rolled material in the direction of eliminating the disparity. The hot rolled material according to claim 1, wherein the joint surfaces 31 and 32 of the preceding rolled material 1 and the subsequent rolled material 2 are deformed zigzag when the relative slip is generated while pressing. Joining method. The hot rolled material according to claim 1, wherein one plate width edge of the preceding roll material 1 and the subsequent roll material 2 is bonded to the other plate width edge. Joining method. The method of joining a hot rolled material according to claim 1, wherein at least one of the preceding rolled material (1) and the subsequent rolled material (2) is vibrated when generating relative slip while pressing. In a continuous hot rolling method in a hot rolling facility having one or more primary rolling mills 53 and a finish rolling mill group 54, (a) a plurality of slabs are rolled by the primary rolling mill 53, and in turn a bar material ( 1, 2), (b) joining the bar materials (1, 2) by the method of claim 1, (c) the bonded bar material (1, 2) to the finish rolling mill group 54 Continuous hot rolling method characterized in that the rolling continuously. In the apparatus for joining a hot rolled material in which the preceding rolled material 1 and the subsequent rolled material 2 are joined in a line of a hot rolling facility, (a) the rear end 1a of the preceding rolled material 1 and the trailing material. First and second mold apparatuses 4 to 7 each independently sandwiching the tip end portions 2a of the rolled material 2 so that their end faces abut each other in the sheet thickness direction of the rolled material; b) one or more of the first and second mold apparatuses so that the gap between the end faces is eliminated, and one end of the preceding rolled material and one end of the subsequent rolled material have a cross section of the other end of the rolled material with respect to the other. And a driving means (9, 10) for operating relative movement in an inclined direction with respect to the hot rolled material. 11. The bonding apparatus for hot rolled material according to claim 10, wherein the first and second mold apparatuses (4 to 7) are configured to be liftable, respectively. The said 1st and 2nd metal mold | die apparatuses 4-7 are the ones of the rear end part 1a of the said prior rolling material 1, and the front end part 2a of the following rolling material 2, respectively. And a rear end portion of the preceding rolled material and a leading end portion of the post-rolled rolled material are inclined with respect to the other side, and the one side is pushed to the other to sandwich the hot rolled material. 12. The driving means (9, 10) according to claim 10, wherein the driving means (9, 10) has one side (6, 7) of the first and second mold apparatuses at one end of the leading end of the preceding rolled material and the other end of the trailing rolled material. An apparatus for joining hot rolled materials, which is operated so as to move relative to an end surface of the end of the rolling material in an inclined direction. 11. The apparatus for joining hot rolled materials according to claim 10, further comprising a position adjusting device (14) for adjusting the height direction position of said rolled material (2). 11. The apparatus according to claim 10, further comprising a conveying device (18) for driving the first and second mold apparatuses (4-7) and the drive means (9, 10) in the advancing direction of the rolled material. Joining method of hot rolled material. The first and second mold apparatuses 5A and 6A each have a plurality of spike-like protrusions 30 on the narrow surfaces of the rolled materials 1 and 2, respectively. A joining apparatus for hot rolled material, characterized in that it is arranged in a zigzag shape with respect to the joining line (32) formed by the joining surfaces of the rolled material ends (1a, 2a). The first and second mold apparatuses 5B and 6B each have a plurality of rack-toothed projections 34 on the narrow surfaces of the rolled materials 1 and 2, respectively. Is arranged beyond the joining line 32 formed by the joining surface of the said rolled material edge part 1a, 2a, The joining apparatus of the hot rolled material characterized by the above-mentioned. 11. The driving device according to claim 10, wherein the driving means comprises: first operating means (9) for exerting a driving force on at least one (6, 7) of the first and second mold apparatuses (4-7, 23, 24); When the first and second mold apparatuses are operatively connected, and when a driving force by the first operating means is applied, one side 6 or 7 of the first and second mold apparatuses is connected to the other side (4). And 5) a linking means (21, 22) for moving in an inclined direction toward the other with respect to the other side. 19. The apparatus as claimed in claim 18, wherein the link means (21, 22) constitute a quadrilateral link with the first and second mold apparatuses (23, 24). 19. The apparatus according to claim 18, wherein the link means has a plurality of links (21, 22) and connecting pins (25a-25d), the position of one or more of the plurality of connecting pins being adjustable, whereby the first actuating means An apparatus for joining hot rolled materials, characterized in that the amount of movement in the longitudinal direction of the rolled sheet of said one mold apparatus 24 when the driving force by (9) acts is adjustable. 19. The first stopper means according to claim 18, wherein the first stopper means for limiting the amount of movement in the direction orthogonal to the longitudinal direction of the rolling material plate of the one mold apparatus 24 when the driving force by the first operating means 9 is applied ( 72) further comprising, wherein the height of said first stopper means is adjustable. 19. The step (a) according to claim 18, wherein one side (23) of said first and second mold apparatuses is moved with respect to the other side (24), and a step (a) in a direction orthogonal to the longitudinal direction of the rolling material plate is formed therebetween. And second linkage means (8), wherein the link means (21, 22) do not change the position of the support points (25a, 25d) with respect to the one mold apparatus during movement by the second actuating means. Bonding apparatus for hot rolled material, characterized in that configured. 23. The second stopper means (70) according to claim 22, further comprising a second stopper means (70) for limiting the amount of movement in the direction orthogonal to the longitudinal direction of the rolling plate of said one mold apparatus (23) during movement by said second actuating means (8). And the height of the second stopper means is adjustable. 19. The apparatus of claim 18, wherein the first and second mold apparatuses each have a pair of upper and lower molds 4, 5, 6, and 7, wherein the lower mold 5 of the first mold apparatus is formed of a pre-rolled material ( It has a length capable of supporting a part of the trailing end 1a of 1) and a part of the leading end 2a of the trailing rolled material 2, and the upper mold 6 of the second mold apparatus is formed of the trailing rolled material 2. An apparatus for joining hot rolled materials, characterized in that it has a length capable of supporting a portion of the front end portion (2a) and a rear end portion (1a) of the preceding rolled material (1). 19. The lifting and lowering means (44) for lifting and lowering the preceding rolled material (1) and the subsequent rolled material (2) from the surfaces of the first and second mold apparatuses 4 to 7 after joining. A bonding apparatus for hot rolled materials, further comprising: 19. The apparatus for joining hot rolled material according to claim 18, further comprising means for removing a margin by applying a force in advance to the direction of the load acting on the link means (46 to 48). 19. The method according to claim 18, wherein the link means (21, 22) moves the one mold apparatus (24) in the inclined direction toward the other mold apparatus (23). A joining apparatus for hot rolled material, further comprising means for causing vibration to one or more of the following rolled materials (2). In the continuous hot rolling facility having one or more primary rolling mills 53 and the finishing rolling mill group 54, the bar materials 1 and 2 which are installed between the primary rolling mill and the finishing rolling mill group and rolled with the primary rolling mill are A continuous hot rolling facility, comprising the joining apparatuses 3 to 3E according to claim 10 to be joined one by one. In a continuous hot rolling facility having at least one prime rolling mill 53 and a finish rolling mill group, the bonding apparatus according to claim 18, which is formed between the prime rolling mill and the finish rolling mill and sequentially joins the bar material rolled with the prime rolling mill. Continuous hot rolling equipment characterized by comprising (3C ~ 3E).