JPH091362A - Roll metal joining method and metal roll joining apparatus - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a method and an apparatus for rolling and joining metals capable of obtaining sufficient joining strength even at the initial stage of rolling and joining. [Structure] After heating a rolling roll 2 to a predetermined temperature by a roll preheating device 6, a first plate material 11 and a second plate material 12 which are superposed on each other are made to travel, and a high frequency heating coil 1 is used to move the plate material 1
1 and 12 are heated to a predetermined temperature, and the plate materials 11 and 12 are roll-bonded by the rolling roll 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal rolling joining method and a metal rolling joining apparatus.

[0002]

2. Description of the Related Art When mass-producing plate materials made of different kinds of metals joined to each other, as shown in FIG. 7, a first plate material 11 and a second plate material 12 are overlapped with each other and a high frequency is applied in a vacuum environment. After heating to a predetermined temperature with the heating coil 1,
The work of rolling and joining with the pair of rolling rolls 2 is repeated.

[0003]

However, in the rolling joining method as described above, there is a case where the plates 11 and 12 are not joined even if the plates 11 and 12 are heated to a predetermined temperature. This tendency is due to the plate materials 11 and 12 at the beginning of rolling and joining
Many, plate material 1 after a while after the start of rolling joining
Almost disappeared at 1,12. Therefore, in order to examine the cause, as shown in FIG. 7, a plate material temperature measuring device 3 provided between the high-frequency heating coil 1 and the rolling roll 2 is used, and the temperature of the rolling roll 2 is measured. While providing the device 4, the plate materials 11 and 1 after the rolling and joining
By providing the plate material temperature measuring device 5 for measuring the temperature of No. 2, an arbitrary point X on the tip side of the surface of each plate material 11, 12
And the temperature change at the time of rolling joining of the rolling roll 2 was investigated. FIG. 8 shows the result.

In the graph of FIG. 8, the horizontal axis represents the passage of time and the vertical axis represents the temperature. On the horizontal axis, t ₁ indicates the time when the location X enters the high frequency heating coil 1, t ₂ indicates the time when the location X leaves the high frequency heating coil 1, and t ₃ indicates the location X. Rolling roll 2
And the time point T ₄ indicates the time when the location X is separated from the rolling roll 2. On the other hand, T _{min on the} vertical axis indicates the lower limit temperature at which the plate members 11 and 12 can be rolled and joined without any problem, and T _max indicates the upper limit temperature at which the roll joining can be performed without any problem. In the graph, a
Is a temperature curve of the above-mentioned portion X of the plate materials 11 and 12 at the beginning of rolling joining, b is a temperature curve of the rolling roll 2 at that time, and c is
Is the plate material 11, 1 after a while after the start of the rolling joining.
2 is the temperature curve of the above-mentioned portion X, and d is the temperature curve of the rolling roll at that time.

As shown in FIG. 8, when the portion X of the plate materials 11 and 12 at the beginning of rolling and joining enters the high frequency heating coil 1, its temperature rises rapidly from room temperature until it exits the coil 1. To the upper limit temperature T _max . After that, when the location X comes into contact with the rolling roll 2, the temperature thereof rapidly drops and becomes lower than the lower limit temperature T _min , and when it separates from the roll 2, it becomes much lower than the lower limit temperature T _min. It was dead. Further, the rolling roll 2 at that time was elevated at the time when the temperature of the rolling roll 2 was changed to room temperature and the contact with the point X was started.

On the other hand, at the location X of the plate materials 11 and 12 after a while from the start of the rolling and joining, the high frequency heating coil 1
Once inside, the temperature rises rapidly from room temperature to the upper limit temperature T _max before exiting the coil 1, as in the initial stage of rolling bonding. After that, above point X
When contacted with the rolling roll 2, the temperature thereof dropped more slowly than in the initial stage of starting the rolling joining, and was higher than the lower limit temperature T _min even when the rolling roll 2 was separated from the rolling roll 2.
Further, the rolling roll 2 at that time moved at a temperature relatively higher than room temperature, and the temperature increased at the time when the rolling roll 2 started contacting with the location X.

That is, since the temperature of the rolling roll 2 is low at the beginning of rolling joining, the rolling roll 2 and the plate material 1
A large amount of heat is transferred from the plate materials 11 and 12 to the rolling rolls 2 in accordance with the contact with the plate materials 1 and 12, and the temperature of the plate materials 11 and 12 at the time of roll bonding becomes equal to or lower than the lower limit temperature T _min . Although 12 is no longer joined, a short time after the start of rolling joining, the temperature of the rolling roll 2 is increased due to the heat transfer from the sheet materials 11 and 12 in the initial stage of starting rolling joining. Even if 11 and 12 and the rolling roll 2 come into contact with each other, only a small amount of heat is transferred from the plate materials 11 and 12 to the rolling roll 2, and the temperature of the plate materials 11 and 12 at the time of roll joining is the lower limit temperature T _min or more. Then, the plate materials 11 and 12 are joined.

[0008] Therefore, an object of the present invention is to provide a metal roll-bonding method and a metal roll-bonding apparatus capable of eliminating such a cause and performing good roll-bonding even at the beginning of roll-bonding. To do.

[0009]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the first method of rolling and joining metals according to the present invention is to heat a plurality of superposed metals and then to preheat the rolls with the metal. Is characterized by rolling and joining.

A second method of rolling and joining metals according to the present invention is to heat a plurality of superposed metals, bring the metals into contact with a roll to preheat the roll, and then heat the metal. It is characterized by rolling and joining with the roll.

On the other hand, in order to achieve the above-mentioned object, the first metal roll bonding apparatus according to the present invention comprises a heating means for heating a plurality of superposed metals and the metal heated by the heating means. And a preheating means for heating the roll.

A second metal rolling-bonding apparatus according to the present invention comprises heating means for heating a plurality of superposed metals,
And a roll for rolling and joining the heated metal when it comes into contact with the metal heated by the heating means.

[0013]

According to the first method of metal roll-bonding of the present invention configured as described above, since the roll is preheated, the amount of heat transferred from the metal to the roll during roll-bonding is significantly suppressed. It

According to the second method of roll-bonding a metal of the present invention, since the heated metal is brought into contact with the roll to preheat the roll, the heated metal is roll-bonded by the roll. The amount of heat transferred from the metal to the roll during joining is greatly suppressed.

On the other hand, according to the first metal roll bonding apparatus of the present invention constructed as described above, the roll is preheated by the preheating means, and then the metal is heated by the heating means, so that the roll is By rolling and joining the metal with
The amount of heat transferred from the metal to the roll during roll bonding can be significantly suppressed.

According to the second metal rolling-bonding apparatus of the present invention, the roll is brought into contact with the metal heated by the heating means to heat the metal, and then the heated metal is roll-bonded. The amount of heat transferred from the roll to the roll can be greatly suppressed.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the metal rolling joining method and metal rolling joining apparatus according to the present invention will be described with reference to FIG. FIG. 1 is a schematic structural view of the device.

As shown in FIG. 1, the first plate member 11 and the second plate member 12 are overlapped with each other and integrally run in the longitudinal direction in this state.
Are made of different metals.

As shown in FIG. 1, a high-frequency heating coil 1 which is a heating means for heating the plate members 11 and 12 to a predetermined temperature is provided on the path line of the plate members 11 and 12. , 12 pass through the inside of the high-frequency heating coil 1. On the downstream side of the plate materials 11 and 12 of the high-frequency heating coil 1 in the pass line,
A pair of rolling rolls 2 which are rolls for rolling 12 are rotatably arranged by sandwiching the plate materials 11 and 12, and the rolling rolls 2 approach and separate from each other to reduce the rolling reduction of the plate materials 11 and 12. It can be adjusted.

As shown in FIG. 1, roll preheating devices 6 which are preheating means for heating the rolling roll 2 to a predetermined temperature are arranged near the rolling roll 2.

As shown in FIG. 1, between the high-frequency heating coil 1 and the rolling roll 2, a pair of plate material temperature measuring devices (for example, radiation thermometer) 3 for measuring the temperature of the plate materials 11 and 12 is provided. Are provided so as to sandwich the plate members 11 and 12. Roll temperature measuring devices (for example, a radiation thermometer) 4 that measure the temperature of the rolling rolls 2 are provided near the rolling rolls 2. A pair of plate material temperature measuring devices (for example, radiation thermometers) 5 for measuring the temperature of the plate materials 11 and 12 are provided downstream of the plate materials 11 and 12 of the rolling roll 2 in the pass line.
It is provided so as to sandwich 1 and 12.

Further, the high-frequency heating coil 1, the rolling roll 2, the plate material temperature measuring devices 3 and 5, the roll temperature measuring device 4, the roll preheating device 6 and the like are respectively arranged in a vacuum chamber (not shown), and under a vacuum environment. Has been used in. That is, the plate materials 11 and 12 are processed in a vacuum environment.

A method for rolling and joining metals by using such a rolling and joining apparatus for metals will be described below. The inside of the vacuum chamber is set to a vacuum environment, the high frequency heating coil 1 is operated, the rolling roll 2 is rotated, and the rolling roll 2 is rotated by the roll preheating device 6.
Heat evenly. The temperature of the rolling roll 2 is measured by the roll temperature measuring device 4, and when the rolling roll 2 reaches a predetermined temperature T _s , the rolling roll 2 is pressed down by a predetermined amount, and the plate materials 11 and 12 are caused to travel. Plate material 11, 1
2 is heated by the high-frequency heating coil 1 to an upper limit temperature T _{max at} which joining can be performed without problems, and is rolled by a rolling roll 2 to be joined.

Here, FIG. 2 shows the temperature change between the arbitrary position X on the front end side of the plate materials 11 and 12 and the rolling roll 2 at this time. Note that FIG. 2 is a graph in which the horizontal axis represents the passage of time and the vertical axis represents the temperature. Further, as for t _{1 on the} horizontal axis, the location X is the high frequency heating coil 1
Shows the entered time within, t ₂ represents the time which the portion X has left the high-frequency heating coil 1, t ₃ indicates the time that the point X is in contact with the rolling rolls 2, t _4, the The point X indicates the time when the part X is separated from the rolling roll 2. on the other hand,
T _{min on the} vertical axis indicates the lower limit temperature at which the plate members 11 and 12 can be rolled and joined without any problem, and T _max indicates the upper limit temperature at which the roll joining can be performed without any problem. Further, in the graph, a is the temperature curve of the location X, and b is the temperature curve of the rolling roll 2.

As shown in FIG. 2, when the location X of the plate materials 11 and 12 enters the high-frequency heating coil 1, the temperature thereof rapidly rises from room temperature, and the upper limit temperature T _max is reached before the location of the coil 1 exits. On the other hand, the temperature of the rolling roll 2 shifts to a predetermined temperature T _s due to the heating by the roll preheating device 6 while the temperature rises up to. After that, when the point X comes into contact with the rolling roll 2, the temperature thereof is gradually lowered, and even when it is separated from the roll 2, the state is kept higher than the lower limit temperature T _min , while the rolling roll 2 is The temperature rise is slight.

That is, the rolling roll 2 is changed to the roll heating device 6
By heating to a predetermined temperature T _s in advance, the transfer of the amount of heat from the plate materials 11 and 12 to the rolling roll 2 at the time of roll bonding is significantly suppressed, and the plate materials 11 and 12 have a lower limit temperature T s.
It will be rolled at a temperature higher than _min .
Therefore, the plate materials 11 and 12 can be reliably roll-bonded even at the beginning of the roll-bonding.

In order to confirm the effects of such a metal rolling joining method and metal rolling joining apparatus, a confirmation test was carried out as described above under the following conditions. As a result, it was confirmed that the shear strength of the joint portion between the first plate material and the second plate material was 14 to 18 kgf / mm ² , and the first plate material and the second plate material could be roll-bonded without any problems.

Another embodiment of the metal rolling joining method and metal rolling joining apparatus according to the present invention will be described with reference to FIGS. 3 is a schematic structural diagram showing the heating state of the rolling rolls in the apparatus, and FIG. 4 is a schematic structural diagram showing the rolling and joining state of the plate materials in the apparatus. However,
The same members as those in the above-described embodiment are designated by the same reference numerals as those in the above-described embodiment, and the description thereof will be omitted.

As shown in FIGS. 3 and 4, the high-frequency heating coil 1, the rolling roll 2, the plate material temperature measuring devices 3 and 5, and the roll temperature measuring device 4 are provided in the same manner as in the above-described embodiment, and are described above. The roll preheating device 6 in the embodiment is
Excluded from this example. That is, the apparatus according to the present embodiment is obtained by removing the roll preheating device 6 from the apparatus according to the above-described embodiment.

A method of rolling and joining metals using such a rolling and joining apparatus for metals will be described below. The inside of the vacuum chamber is set to a vacuum environment, the distance between the rolling rolls 2 is adjusted to be equal to the thickness of the plate materials 11 and 12, that is, the rolling reduction is 0, and the rolls 2 are rotated, while the high frequency heating coil 1 is used. Is operated to move the plate materials 11 and 12 to heat the plate materials 11 and 12 to the upper limit temperature T _max by the high-frequency heating coil 1 and then evenly contact the outer peripheral surface of the rolling roll 2 to cause the roll 2 to rotate. (Fig. 3)
), The above-mentioned plate material 11 that has finished contact with the rolling roll 2,
By causing 12 to travel again, the plate members 11 and 12
Was heated again by the high-frequency heating coil 1 to the temperature T _{ma x,} it repeated several times to heat the mill roll 2 again.

Here, the surfaces of the plate members 11 and 12 at this time are
Diagram of temperature change between arbitrary point X on the tip side and rolling roll 2
It is shown in FIG. Note that FIG. 5 is a graph of the horizontal axis and
If the vertical axis represents the same dimension as the graph of the above-mentioned embodiment,
And t on the horizontal axis₁~ T_FourAnd T on the vertical axis_min,
T_maxAlso shows the same value as the graph of the above-mentioned embodiment.
You. In the graph, a₁Is the plate materials 11 and 12 and the rolling
Temperature curve of the above-mentioned location X at the first contact with the tool 2,
b₁Is the temperature curve of the rolling roll 2 at that time, a _TwoIs a board
On the second contact between the materials 11 and 12 and the rolling roll 2
Temperature curve at point X, b_TwoOf the rolling roll 2 at that time
Temperature curve, a_ThreeBetween the plate materials 11 and 12 and the rolling roll 2
Temperature curve of the above-mentioned location X at the time of the third contact, b_ThreeIs
Temperature curve of the rolling roll 2 at_nIs the plate material 11, 1
2 and the rolling roll 2 at the time of the n-th contact
Temperature curve, b_nIs the temperature curve of the rolling roll 2 at that time
is there.

As shown in FIG. 5, when the portion X of the plate materials 11 and 12 for the first time contacting the rolling roll 2 enters the high frequency heating coil 1, the temperature thereof is the same as in the above-described embodiment. When the temperature rises sharply from room temperature, reaches the upper limit temperature T _max before coming out of the coil 1 and comes into contact with the rolling roll 2, the temperature sharply decreases like the conventional case and becomes lower than the lower limit temperature T _min . is also lowered, when away from the roll 2 is much lower than the lower limit temperature T _min. On the other hand, the rolling roll 2 at that time rises at the time when the temperature shifts at room temperature and the contact with the point X starts, as in the conventional case.

Then, when the plates 11 and 12 are made to travel again, the portion X of the plates 11 and 12 for the second time is heated in the high-frequency heating coil 1 at the temperature after the contact with the rolling roll 2 is completed. In the same manner as described above, the temperature rises to the upper limit temperature T _{max by the} time the coil 1 exits, and when it comes into contact with the rolling roll 2, the temperature drops more slowly than in the case of the first time. When the roll 2 is separated from the roll 2, the temperature becomes higher than that in the first time, but becomes lower than the lower limit temperature T _min . Meanwhile, the rolling roll 2 at that time
Moves at the temperature heated by the first contact with the plate materials 11 and 12, and rises when the contact with the above point X starts.

Further, when the plate members 11 and 12 are repeatedly run n times as described above, the rolling roll 2
, Its temperature gradually rises to a predetermined temperature T _s ,
At the location X of the plate materials 11 and 12, the temperature drop due to the contact with the rolling roll 2 becomes very gradual, and even if the plate material 11 and 12 separates from the rolling roll 2, the temperature becomes higher than the lower limit temperature T _min .

That is, by repeating the contact of the plate materials 11 and 12 heated by the high frequency heating coil 1 with the rolling roll 2, the rolling roll 2 is heated in place of the roll preheating device 6 of the above-described embodiment. I did it.

When the rolling roll 2 is heated to the predetermined temperature T _s in this manner, the rolling roll 2 is pressed down by a predetermined amount and the plate materials 11 and 12 are run in the same manner as in the above-described embodiment. The plate materials 11 and 12 are heated by the high frequency heating coil 1 and rolled by the rolling roll 2 to be joined (see FIG. 4).

As shown in FIG. 6, which is a graph showing the temperature change between the arbitrary position X on the front end side of the plate materials 11 and 12 and the rolling roll 2 at this time, as shown in FIG. 6, the rolling roll 2 has a predetermined temperature T _s. Since the sheet materials 11 and 12 are heated to 1, the temperature of the plate materials 11 and 12 does not become lower than the lower limit temperature T _min even when they come into contact with the rolling roll 2 as in the above-described embodiment. Therefore, the plate members 11 and 12 can be reliably roll-bonded as in the above-described embodiment.

In order to confirm the effect of such a metal rolling joining method and metal rolling joining apparatus, a confirmation test was conducted as described above under the following conditions.

[0039]

As a result, the shear strength of the joint portion between the first plate member and the second plate member was 15 to 18 kgf / m in the confirmation test 2.
m ² and the confirmation test 3 is 30 to 40 kgf / mm ^2.
It was confirmed that both of them could roll-bond the first plate material and the second plate material without any problem.

In the above-mentioned embodiment, the case where two plate materials made of different kinds of metals are roll-bonded to each other has been described. However, when the same kind of metals are roll-bonded or when three or more metals are roll-bonded. The present invention can also be applied to the above. Further, in the above-described examples, the roll-bonding was performed in a vacuum environment, but depending on the type of metal to be roll-bonded, for example, the treatment may be performed under an appropriate controlled atmosphere such as an inert gas atmosphere such as nitrogen gas. Good.

[0042]

As described above, in the metal rolling joining method and the metal rolling joining apparatus according to the present invention, since the roll is preheated, the heated metal is rolled and joined. The amount of heat transferred from the roll to the roll can be significantly suppressed. Therefore, sufficient joining strength can be obtained even with the metal at the beginning of rolling joining, and good rolling joining can always be performed.

[Brief description of the drawings]

FIG. 1 is a schematic structural diagram of an embodiment of a metal roll bonding apparatus according to the present invention.

FIG. 2 is a graph showing temperature changes of a plate material and a roll when a metal plate material is roll-bonded using the apparatus.

FIG. 3 is a schematic structural view showing a roll heating state of another embodiment of the metal roll bonding apparatus according to the present invention.

FIG. 4 is a schematic structural diagram showing the rolling and bonding state.

FIG. 5 is a graph showing a temperature change of a plate material and a roll when the roll is heated.

FIG. 6 is a graph showing a temperature change of a plate material and a roll during the roll joining.

FIG. 7 is a schematic structural diagram of a conventional example of a metal rolling joining apparatus.

FIG. 8 is a graph showing temperature changes of a plate material and rolls when a metal plate material is rolled using the apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High-frequency heating coil 2 Rolling rolls 3,5 Plate material temperature measuring device 4 Roll temperature measuring device 6 Roll preheating device 11 First plate material 12 Second plate material

Claims (4)

[Claims] 1. After heating a plurality of stacked metals,
A roll-bonding method for metals, comprising rolling and bonding the metal with a preheated roll. 2. A method in which a plurality of stacked metals are heated, the metal is brought into contact with a roll to preheat the roll, and the heated metal is rolled by the roll to be joined. Method for rolling and joining metals. 3. A heating means for heating a plurality of superposed metals, a roll for rolling and joining the metals heated by the heating means, and a preheating means for heating the rolls. A rolling and joining device for metals. 4. A heating means for heating a plurality of stacked metals, and a roll for contacting the metal heated by the heating means and rolling and joining the heated metal when heated. A rolling and joining device for metals.