JP3349296B2 - Metal rolling joining method and metal rolling joining apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

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

[0003]

However, in the above-described rolling joining method, even if the sheet materials 11 and 12 are heated to a predetermined temperature, the sheet materials 11 and 12 may not be joined. This tendency is caused by the plate materials 11 and 12 at the beginning of the rolling joining.
Plate material 1 after a while after the start of rolling joining
At 1,12, it almost disappears. Therefore, in order to investigate the cause, as shown in FIG. 7, a sheet temperature measuring device 3 provided between the high-frequency heating coil 1 and the rolling roll 2 is used, and a roll temperature measurement for measuring the temperature of the rolling roll 2 is performed. While the apparatus 4 is provided, the plate materials 11 and 1 after the roll joining are performed.
By providing the plate material temperature measuring device 5 for measuring the temperature of the plate 2, an arbitrary portion X on the front end side of the surface of each of the plate materials 11 and 12 is provided.
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. In the horizontal axis, t ₁ indicates a time when the location X enters the high-frequency heating coil 1, t ₂ indicates a time when the location X exits the high-frequency heating coil 1, and t ₃ indicates a time when the location X enters the high-frequency heating coil 1. Is rolling roll 2
, And t ₄ indicates a time at which the portion X is separated from the rolling roll 2. On the other hand, T _min to dwell in the vertical axis represents the lower limit temperature at which roll-bonding of the sheet material 11, 12 is carried out without any problem, T _max indicates the maximum temperature to which the roll joining is performed without problems. In the graph, a
Is the temperature curve of the above-mentioned portion X of the plate materials 11 and 12 at the beginning of the rolling joining, b is the temperature curve of the rolling roll 2 at that time, c
Is a sheet material 11, 1 after a short time from the start of rolling joining.
2 is a temperature curve of the portion X, and d is a temperature curve of the rolling roll at that time.

[0005] As shown in FIG. 8, when the location X of the sheet material 11, 12 at the beginning of the rolling joining enters the high-frequency heating coil 1, the temperature rapidly rises from room temperature until it leaves the coil 1. Rises to the upper limit temperature _Tmax . Thereafter, when the portion X comes into contact with the rolling roll 2, the temperature sharply drops and becomes lower than the lower limit temperature T _min , and when leaving the roll 2, the temperature becomes much lower than the lower limit temperature T _min. Had been lost. In addition, the rolling roll 2 at that time had risen from the time when the temperature of the rolling roll 2 shifted to room temperature and started to come into contact with the location X.

On the other hand, after a short time from the start of the rolling joining, the portion X of the plate material 11, 12 is
When the temperature falls within the range, the temperature rises rapidly from room temperature and rises to the upper limit temperature _Tmax before the coil 1 exits, as in the early stage of the start of the rolling joining. Then, the above location X
When the roll contacted the rolling roll 2, its temperature was lowered more gradually than in the initial stage of the start of rolling joining, and was higher than the lower limit temperature T _min even when the roll was separated from the roll 2.
Further, the rolling roll 2 at that time was moved at a temperature relatively higher than room temperature, and the temperature was rising around the time when the rolling roll 2 started to contact the location X.

That is, at the beginning of the rolling joining, the temperature of the rolling roll 2 is low.
With the contact between 1,12 and moves a large amount of heat from the plate member 11 to the rolling rolls 2, the temperature of the plate 11 and 12 at the time of rolling the junction becomes less than the lower limit temperature T _min, the plate material 11, However, a short time after the start of the rolling joining, the temperature of the rolling roll 2 is increased due to the heat transfer from the plates 11 and 12 at the beginning of the rolling joining. Even when the rolls 11 and 12 come into contact with the rolling rolls 2, only a small amount of heat moves from the plates 11 and 12 to the rolling rolls 2, and the temperature of the plates 11 and 12 at the time of rolling joining is _{equal to} or higher than the lower limit temperature _Tmin. Thus, the plate materials 11 and 12 are joined.

Accordingly, an object of the present invention is to provide a metal rolling joining method and a metal rolling joining apparatus which can eliminate such causes and perform good rolling joining even at the beginning of rolling joining. I do.

[0009]

[0010]

[Means for Solving the Problems ] To solve the above-mentioned problems.
For the method of rolling and joining metals according to the present invention , a plurality of superposed metals are heated, the metals are brought into contact with a roll, and the roll is heated in advance, and then the heated metal is rolled with the roll. It is characterized by joining.

[0011]

[0012] Further , a book for solving the above-mentioned problems is provided.
The apparatus for rolling and joining metals according to the present invention includes
A rolling joining apparatus used for performing a rolling joining method,
Heating means for heating a plurality of said metal superimposed, heated in contact the said metal which is heated by the heating means those
And a roll for rolling and joining the heated metal later .

[0013]

[0014]

According to the rolling method for joining metal the present invention, the heated metal is brought into contact with the roll after heating the roll in advance, a heated metal since roll-bonding with a roll, a metal during rolling joint The amount of heat transferred to the roll is greatly reduced.

[0015]

According to the roll-bonding apparatus of the metal of the present invention, pressurized
Heating means heats the metal, which contacts the roll
After heating the roll, the roll is heated
Since the metal is roll-joined, the amount of heat transferred from the metal to the roll during roll-joining can be greatly reduced.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a metal rolling joining method and a 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 superimposed and run integrally in this state in the longitudinal direction.
Are made of different kinds of metals.

As shown in FIG. 1, a high-frequency heating coil 1 serving as a heating means for heating the plate members 11 and 12 to a predetermined temperature is provided on a pass line of the plate members 11 and 12. , 12 pass through the high-frequency heating coil 1. On the downstream side of the pass lines of the plates 11 and 12 of the high-frequency heating coil 1,
A pair of rolling rolls 2 for rolling the rolls 12 are rotatably provided with the plate materials 11 and 12 interposed therebetween. 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, in the vicinity of the rolling roll 2, roll preheating devices 6 as preheating means for heating the rolling roll 2 to a predetermined temperature are arranged.

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

Further, the high-frequency heating coil 1, the rolling roll 2, the sheet material temperature measuring devices 3 and 5, the roll temperature measuring device 4, the roll preheating device 6, and the like are arranged in a vacuum chamber (not shown). It 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 such a rolling and joining apparatus for metals will be described below. The vacuum chamber is set in a vacuum environment, the high-frequency heating coil 1 is operated, and the rolling roll 2 is rotated.
Is heated evenly. By measuring the temperature of the rolling rolls 2 at a roll temperature measurement device 4, when the rolling roller 2 reaches a predetermined temperature T _s, the mill roll 2 by a predetermined amount reduction, by moving the plate 11, the Plate material 11, 1
2 is heated by the high-frequency heating coil 1 to the upper limit temperature _{Tmax at} which the joining can be performed without any problem, and the two are rolled by the rolling roll 2 and joined.

FIG. 2 shows a change in temperature between an arbitrary point X on the front end side of the surface of the plate materials 11 and 12 and the rolling roll 2 at this time. FIG. 2 is a graph of the graph, in which the horizontal axis represents the passage of time and the vertical axis represents the temperature. Further, t _{1 on the} horizontal axis indicates that the location X is the high-frequency heating coil 1.
, T ₂ indicates the time when the location X comes out of the high-frequency heating coil 1, t ₃ indicates the time when the location X contacts the rolling roll 2, and t ₄ indicates The point X indicates a 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 rolling joining of the sheet materials 11 and 12 is performed without any problem, and T _max indicates the upper limit temperature at which the rolling joining is performed without any problem. In the graph, a is a temperature curve of the portion X, and b is a temperature curve of the rolling roll 2.

As shown in FIG. 2, when the portion X of the plate material 11 or 12 enters the high-frequency heating coil 1, its temperature rises sharply from room temperature, and reaches the upper limit temperature T _max until it leaves the coil 1. while raised to the rolling rolls 2, by heating by the roll preheating device 6, the temperature is shifted at a predetermined temperature T _s. Thereafter, when the location X comes into contact with the rolling roll 2, the temperature thereof gradually decreases, and when the location X is separated from the roll 2, the temperature is maintained higher than the lower limit temperature _Tmin. The temperature rise is slight.

That is, the rolling roll 2 is moved to the roll heating device 6
By preheating to a predetermined temperature T _s , the amount of heat transferred from the plates 11 and 12 to the rolling roll 2 during rolling joining is greatly suppressed, and the plates 11 and 12 are heated to the lower limit temperature Ts.
Rolling occurs at a temperature higher than _min .
Therefore, the plate materials 11 and 12 can be securely roll-joined even at the initial stage of the roll-joining start.

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

Another embodiment of the metal rolling joining method and the metal rolling joining apparatus according to the present invention will be described with reference to FIGS. FIG. 3 is a schematic structural view showing a heated state of a rolling roll in the apparatus, and FIG. 4 is a schematic structural view showing a rolled and joined state of plate materials in the apparatus. However,
The same members as those in the above-described embodiment are denoted 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 sheet 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. The roll preheating device 6 in the embodiment described
It is excluded from the present embodiment. That is, the apparatus of the present embodiment is obtained by removing the roll preheating device 6 from the apparatus of the above-described embodiment.

A method for rolling and joining metals by such a rolling and joining apparatus for metals will be described below. The vacuum chamber is set in a vacuum environment, and the interval between the rolling rolls 2 is adjusted to a size equivalent to the thickness of the plate materials 11 and 12, that is, the rolling reduction is 0, and the rolls 2 are rotated. Is operated to drive the plate materials 11 and 12 to heat the plate materials 11 and 12 to the upper limit temperature _Tmax with the high-frequency heating coil 1 and thereafter to evenly contact the outer peripheral surface of the rolling roll 2, and (Figure 3)
), The above-mentioned plate material 11 having finished contact with the rolling roll 2,
12 is run again, the plate materials 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 surface of the plate material 11, 12 at this time is
Diagram showing temperature change between arbitrary point X on the tip side and rolling roll 2
It is shown in FIG. FIG. 5 is a graph of the graph.
When the vertical axis represents the same dimension as the graph of the above-described embodiment,
And t on the horizontal axis₁~ T_FourAnd T on the vertical axis_min,
T_maxAlso shows the same values as in the graph of the above-described embodiment.
You. In the graph, a₁Are the plate materials 11 and 12
Temperature curve at the point X at the time of the first contact with the
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 location X, b_TwoOf the rolling roll 2 at that time
Temperature curve, a_ThreeOf the plate materials 11 and 12 and the rolling roll 2
Temperature curve at the point X at the time of the third contact, b_ThreeIs
Temperature curve of the rolling roll 2 at the time of_nAre plate materials 11 and 1
2 at the time of the n-th contact of the rolling roll 2
Temperature curve, b_nIs the temperature curve of the rolling roll 2 at that time.
is there.

As shown in FIG. 5, when the location X of the first plate material 11, 12 in contact with the rolling roll 2 enters the high-frequency heating coil 1, the temperature of the location X becomes the same as in the above-described embodiment. When the temperature rises sharply from room temperature, rises to the upper limit temperature _Tmax before the coil 1 comes out, and comes into contact with the rolling roll 2, as in the conventional case, the temperature drops sharply and becomes lower than the lower limit temperature _Tmin . 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 around the time when its temperature shifts to room temperature and starts to come into contact with the location X as in the conventional case.

Subsequently, when the plate materials 11 and 12 are run again, the location X of the second plate materials 11 and 12 is set in the high-frequency heating coil 1 at the temperature after the end of the contact with the rolling roll 2 described above. As described above, the temperature rises to the upper limit temperature _{Tmax by the} time the coil 1 exits, and when the coil 1 comes into contact with the rolling roll 2, the temperature falls more slowly than in the first case, When leaving the roll 2, the temperature is higher than in the first case, but lower than the lower limit temperature _Tmin . On the other hand, 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 location X starts.

Further, when the plates 11 and 12 are repeatedly run n times as described above,
Becomes a predetermined temperature T _s temperature is gradually increased,
The temperature of the portions X of the plate materials 11 and 12 decreases very slowly due to the contact with the rolling rolls 2, and the temperature thereof becomes higher than the lower limit temperature T _min even when separated from the rolling rolls 2.

That is, by repeatedly contacting the plates 11 and 12 heated by the high-frequency heating coil 1 with the rolling roll 2, the rolling roll 2 is heated instead of the roll preheating device 6 of the above-described embodiment. It was.

[0036] Once heated this way the rolling rolls 2 to a predetermined temperature T _s, similar to the embodiment described above, the rolling rolls 2 by a predetermined amount reduction, by running the plate 11 and 12, the The plate materials 11 and 12 are heated by the high-frequency heating coil 1 and are rolled and bonded by the rolling roll 2 (see FIG. 4).

At this time, as shown in FIG. 6, which is a graph showing a temperature change between an arbitrary portion X on the front end side of the surface of the plate members 11 and 12 and the rolling roll 2, the rolling roll 2 has a predetermined temperature T _s. Since the sheet materials 11 and 12 are in contact with the rolling roll 2 as in the above-described embodiment, the temperature does not become lower than the lower limit temperature _Tmin . Therefore, similarly to the above-described embodiment, the plate members 11 and 12 can be securely roll-joined.

In order to confirm the effects of such a metal rolling joining method and a 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 between the first plate and the second plate was 15-18 kgf / m in the confirmation test 2.
m ² , and 30 to 40 kgf / mm ^{2 in} confirmation test 3.
In both cases, it was confirmed that the first plate material and the second plate material could be roll-joined without any problem.

In the above-described embodiment, the case where two plates made of different kinds of metals are rolled and joined has been described. However, the case where the same kind of metals are rolled and joined or the case where three or more metals are rolled and joined. The present invention can also be applied to such cases. Further, in the above-described embodiment, the roll joining is performed in a vacuum environment. However, depending on the type of the metal to be roll joined, for example, the treatment is performed under an appropriate control atmosphere such as an inert gas atmosphere such as a nitrogen gas atmosphere. I just need.

[0042]

As described above, in the method for rolling and joining metals according to the present invention, the apparatus for rolling and joining metals is used for superimposing.
Heat a plurality of metals and bring them into contact with a roll.
After pre-heating the roll, the heated metal is
Since the rolls are rolled and joined , the amount of heat transferred from the metal to the rolls during roll joining can be significantly reduced.
For this reason, sufficient joining strength can be obtained even with the metal at the beginning of rolling, and good rolling joining can always be performed.

[Brief description of the drawings]

FIG. 1 is a schematic structural view of one embodiment of a metal rolling joining apparatus according to the present invention.

FIG. 2 is a graph showing a temperature change of a sheet material and a roll when a metal sheet material is rolled and joined by using the apparatus.

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

FIG. 4 is a schematic structural view showing the roll-joined state.

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

FIG. 6 is a graph showing a temperature change of a sheet material and a roll at the time of the roll joining.

FIG. 7 is a schematic structural view of a conventional example of a metal roll joining apparatus.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High frequency heating coil 2 Roll roll 3,5 Sheet temperature measuring device 4 Roll temperature measuring device 6 Roll preheating device 11 First sheet material 12 Second sheet material

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takayuki Kono 5-717-1 Fukahori-cho, Nagasaki-shi, Nagasaki Mitsubishi Heavy Industries, Ltd. Nagasaki Research Laboratory (72) Inventor Masanori Matsui 5-717 Fukahori-cho, Nagasaki-city, Nagasaki No. 1 Mitsubishi Heavy Industries, Ltd., Nagasaki Research Laboratory (72) Inventor Yoshiaki Inoue 5-717-1, Fukahori-cho, Nagasaki City, Nagasaki Prefecture Mitsubishi Heavy Industries, Ltd., Nagasaki Research Laboratory (72) Inventor Shizuo Yuko Minami Kokura Minami, Kitakyushu City, Fukuoka Prefecture 5-43-7 Kutsuami Nishi-ku (72) Inventor Kazumasa Nishio 2-4-38 Takanosu, Yawatanishi-ku, Kitakyushu-shi, Fukuoka (56) References JP-A-2-200384 (JP, A) JP-A-61-195789 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B23K 20/00-20/04

Claims (2)

(57) [Claims] 1. A method of heating a plurality of superposed metals ,
The metal was brought into contact with the roll and the roll was pre-heated
Thereafter, the above-mentioned heated metal is rolled and bonded by the roll, and the metal is rolled and bonded. 2. The method for rolling and joining metals according to claim 1, wherein
This is a rolling joining device used for implementation, and
Heating means for heating a number of said metals;
After being heated in contact with the heated metal,
And a roll for rolling and joining the metal.
And a metal rolling joining apparatus.