JPH0313948B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a continuous manufacturing method for dissimilar metal clad plates, and particularly to a continuous manufacturing method that can continuously manufacture ultra-thin clad plates. .

[Prior Art] In general, a method is already known in which metal plates of different types are laminated and bonded to the surface of a certain base material (metal plate) to produce a complete plate, that is, a clad plate.

For example, known methods for manufacturing this clad plate include casting, cold welding, explosive crimping, brazing, ultrasonic vibration, and thermal diffusion, but the method used by Tokko Sho is known for its strong adhesive strength. A thermal diffusion method or apparatus as disclosed in Japanese Patent No. 52-8624 has been employed, but none of these manufacturing methods allows for continuous manufacturing of clad plates, and they are manufactured in batches.

Usually, clad plates are used in the form of very thin plates, so in order to improve productivity, the base material and the dissimilar metal plates laminated thereon are rolled into ultra-thin plates in advance. It is also conceivable to directly clad them in advance.
However, when these extremely thin metal plates are constructed, the plates become wavy and a gap is created between the base material and the dissimilar metal plates, so the above method cannot be used.

Therefore, in the conventional method shown in the above-mentioned publication, first, dissimilar and relatively thick metal plates to be clad are laminated, and this laminated plate is further superimposed on an insulated flat electric heating element. While heated and maintained at a predetermined temperature, these are uniformly pressed or compressed from the stacking direction using a press, etc., thereby forming an intermediate alloy layer on the contact surface between the base material and dissimilar metal plates, and joining them. After that, the heating was stopped and the material was left to cool under pressure to produce a clad plate.

The produced thick clad plate is then repeatedly rolled and heat treated many times to form it into an extremely thin plate, thereby producing a clad plate for use.

[Problems to be Solved by the Invention] However, the above-described manufacturing method and device examples have the following problems.

Since a relatively thick base material and a thick dissimilar metal are bonded in advance with a cladding, and then rolled and heat treated, the workability is poor and continuous operation is not possible, so it is necessary to sufficiently increase productivity. I couldn't do it.

When applying cladding, it is carried out in a furnace or jacket maintained in a reducing or inert atmosphere to prevent oxidation of the material.
Since there are restrictions on the size of this furnace or jacket, the size of the thick clad plate that can be manufactured at one time is limited, making it impossible to manufacture long pieces.

When cooling a thick cladding plate that has been heated and molded, the heater is stopped and the cladding plate is left to cool until it becomes shiny.
Cooling took a long time, further reducing productivity.

[Object of the Invention] An object of the present invention is to provide a continuous manufacturing apparatus that can continuously manufacture ultra-thin clad plates.

[Summary of the Invention] The structure of the present invention is to use a method for continuous production of dissimilar metal clad plates in which dissimilar metal plates are laminated on the surface of a base material and then heat-treated to clad the base material. By layering materials and dissimilar metal plates,
This is transferred to the cladding forming section, where the laminate to be treated is compressed by carbon plates from the stacking direction in a reducing atmosphere, and the laminate to be treated is heated for a predetermined period of time while being slid and transferred to laminate the laminate. The laminate is made into a cladding by forming an intermediate alloy layer between the plates, and the plate carried out from the cladding forming section is cooled in a bright state in a reducing atmosphere. By slidingly transferring the material while applying pressure, it is possible to apply pressure without damaging the surface of the laminate, and by heating the laminate through the carbon plate, the laminate can be continuously cladded.

[Embodiment] A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

Fig. 1 is a plan view showing an apparatus for carrying out the continuous manufacturing method of dissimilar metal clad plates according to the present invention, Fig. 2 is a partially cutaway plan view showing the cladding forming part, and Fig. 3 is an enlarged view of section A in Fig. 2. 4 is a longitudinal sectional view showing the cooling section, and FIG. 5 is a partially cutaway perspective view showing the internal structure of the cooling section.

This continuous manufacturing apparatus as shown in FIG. It mainly consists of a cladding section 2 that heats and compresses the treated laminate in a reducing atmosphere such as H ₂ to perform cladding, and a cooling section 3 that cools the heated plate in a bright state. There is.

Specifically, the transfer means 1 includes a roll carrying device 4 for supplying the laminate S to be processed, and a roll carrying device 4 for supplying the laminate S to be processed,
A driving roller box device 5 is located at the most downstream side in the direction of transport of the laminate and transports the entire laminate by drawing in the laminate S, and a drive roller box device 5 is located at the most downstream side in the direction of transport of the laminate to transfer the entire laminate. It is configured by a winding device 6 that winds up the winding device.

The roll carry-in device 4 is constructed by rotatably supporting a tension roller 8 on a roll carry-in frame 7. Attached to this tension roller 8 is a strip roll 9 formed by laminating a base material previously formed into an ultra-thin strip shape and a dissimilar metal plate and winding them into a roll shape for cladding treatment. By unwinding this, the laminates S to be treated can be sequentially supplied. Further, the drive roller box device 5 is constructed by providing two pairs of drive rollers 11, 11 in the transport direction, which sandwich the already manufactured clad plate h from above and below on a pedestal 10, and each drive roller is driven by a motor. The laminated plate S to be processed is unwound from the band-shaped roll 9 and transported by rotating in the sending direction by the driving force transmitted from the driving source 12 such as the above. The winding device 6 comprises a winding drum 14 rotatably mounted on a pedestal 13, and is configured to wind up the produced clad plate h by rotating this drum in the winding direction.
On the upstream side of the cladding forming section 2, a guiding device 16 is provided in which a large number of pinch rollers 15 are arranged in order to linearly introduce the laminate S to be treated into the forming section 2.

On the other hand, as shown in FIG. 2, the cladding forming section 2 is hermetically covered with a housing 17 having a generally rectangular cross section.
Seal members (not shown) are provided at each of the outlet 8 and the outlet 19. In order to prevent the laminate S from oxidizing during heating, the housing 17 is filled with a reducing gas such as H ₂ to create a reducing atmosphere. In addition, at the beginning of operation, etc., inert gas (CO ₂ ), etc. is introduced into the housing 17 before H ₂ replacement.
This inert gas is replaced with _H2 to prevent explosions. As shown in FIG. 3, inside this housing 17, there is a mechanism for squeezing the laminate S by a predetermined pressure from above and below, centering on the laminate S passing through the housing 17 and being transferred. Carbon plates 20, 20 and the carbon plate 2
Electric heaters 23, 23 are laminated with uniform steel plates 21, 21 interposed on the opposite side of the surface that presses against the laminate S of Nos. , this heater 2
Insulating materials 24, 24 made of asbestos or the like to prevent heat dissipation by 3, 23, and a clamping pressure for clamping the laminate S by a predetermined pressure from the stacking direction, that is, from the top and bottom directions, by the carbon plates 20, 20. The means 25, 25 are respectively laminated one after another.

The clamping means 25 is composed of a press plate 26 made of thick carbon steel, for example, and a press member 27 that presses the upper press plate 26 downward from the outside of the housing 17. A predetermined pressure is applied to the laminate S from the stacking direction (vertical direction). Since it is necessary to allow vertical movement of the press member 27, the upper part of the housing 17 has flexibility in the vertical direction. Further, since the laminated plate S needs to be slid and moved while being pressed between the carbon plates 20, 20, an elastic member such as a spring is used as the press member 27 to apply elastic pressure from above and below. Furthermore, instead of the carbon plates 20, 20, stainless steel or the like may be used and brought into direct contact with the laminate, but in this case stainless steel cannot be used because it would cause galling. In particular, the carbon plates 20, 20 have excellent properties such as smoothness, resistance to oxidation, and sufficient resistance to this type of pressure.

Further, power supply lines 28, 28 are connected to the electric heaters 23, 23, and the heating temperature of the laminate S is set between the base material of the laminate S and the dissimilar metal plate at the junction. The temperature is set at a temperature that can form an alloy layer and is lower than the melting points of the base material and dissimilar metals (usually around 800°C).

On the other hand, as shown in FIGS. 4 and 5, the cooling section 3 is hermetically covered as a whole by a housing 29 having a rectangular cross section like the cladding forming section 2, and is not transported from the cladding forming section 2 side. A carry-in port 30 for carrying in the coming board and a carry-in port 3 for carrying it out
A seal member (not shown) is provided in each of the parts 1. The housing 29 is filled with a reducing gas such as H ₂ to create a reducing atmosphere in order to prevent the laminate S, which is still at a high temperature, from being oxidized. That is, since the clad plate oxidizes in the air at temperatures above about 100° C. and causes discoloration, etc., it is necessary to prevent oxidation even during cooling, so a reducing atmosphere is created within the housing. Therefore, the outlet 1 of the cladding forming section 2
9 and the loading port 30 of this cooling section 3 are connected by a sealed communication path 32, and by filling this with a reducing gas, oxidation of the plate transferred into this communication path 32 is prevented. are doing.

Inside the housing 29, there are carbon plates 33, 33 for holding the laminated plate S, that is, the cladding plate h, which is transferred through the housing 29, from above and below. Cooling jackets 34, 34 located on the opposite side of the surface that clamps the clad plate h
are sequentially stacked. Cooling jacket 3 above
4, 34, the outer shell is made of a material with good thermal conductivity,
For example, it is formed as a long box body 35 from aluminum or the like. Inside this box body 35, a large number of baffle plates 36 are arranged alternately in the width direction, and between these baffle plates 36, a refrigerant flow path 37 is formed in a meandering manner along the transport direction of the clad plate. is formed. A refrigerant inlet 38 is formed on the side of the box body 35 on the upstream side in the transport direction of the cladding plate h, and a refrigerant outlet (not shown) is formed on the downstream side, and water flowing through the cooling jackets 34, 34 is formed on the downstream side. The cooling heat of the refrigerant gradually and indirectly cools the clad plate h to the laminate plate S, which are moved while being held between the carbon plates 33 and 33, in a bright state. Next, the operation of the present invention configured as described above will be explained.

First, a base material to be cladded and a skin metal plate as a dissimilar metal plate are each pre-formed into ultra-thin strips, and these are stacked and layered and wound into a roll to produce the strip roll 9. I'll keep it. In this example, a phosphor bronze plate is used as the base material and molded to a thickness of 1 to 1.5 mm, and a gold plate or a silver plate is used as the dissimilar metal plate to be molded to a thickness of 3/100 to 0.1 mm.
Form into mm. This wall thickness is much thinner than the base material of the conventional example, which has a wall thickness of approximately 13 mm, and the dissimilar metal plate, which has a wall thickness of approximately 0.5 mm. Then, the manufactured belt-shaped roll 9 is attached to the tension roller 8 of the roll carrying device 4 which constitutes a part of the transport means 1,
The leading end of the laminate S to be treated is passed through the clad forming section 2, the cooling section 3, etc., and then wound and fixed around the winding drum 14 of the winding device 6. In addition, at the beginning of operation, this skin metal plate is laminated on the base material from the middle in order to eliminate waste of the skin metal plate.

When the entire device is operated in such a state, the drive rollers 11 of the drive roller box device 5 rotate in the conveying direction, so the laminate S is unwound one after another from the strip roller 9, and the entire laminate is wound up. It is transferred towards the device 6. During this time, the direction in which the laminate S is introduced into the cladding forming section 2 is maintained in a straight line by the pinch roller 15 of the guiding device 16, and the laminate S is subjected to a pinching heat treatment in the cladding forming section 2. In the cooling section 3, cooling treatment is sequentially performed in a bright state, and clad plates h are continuously manufactured.

First, in the cladding forming section 2, pressure is applied downward from above the housing 17 with elasticity by operating the press member 27 that constitutes a part of the clamping means 25. As a result, the push plates 2 are stacked at the top and bottom of the housing 17.
Pressure is applied between 6 and 26, and the carbon plates 20 and 2
A predetermined clamping force is applied to the laminate S slidingly moving between 0 and 0 from the stacking direction. In this case, since the pressure is applied with elasticity in the vertical direction, the laminate S is not tightly clamped, and this sliding movement is allowed.

At the same time, the electric heaters 23 and 23 are energized via the power supply lines 28 and 289, and the heat generated from this is passed through the uniform steel plates 21 and 21 and the carbon plates 20 and 20 to the laminate S to be treated. is transmitted and heats it to a high temperature. This heating temperature is set at a temperature at which an intermediate alloy layer can be formed at the joint between the base material of the laminate and the dissimilar metal plate due to thermal diffusion, and at a temperature lower than the respective melting points of the base material and the dissimilar metal. This temperature is usually set at around 800°C, although it depends on the metal material used.

In this way, the laminate S is heated at a predetermined temperature,
In addition, since the laminate S is clamped with a predetermined pressure, the laminate S is clad. In this case, since the carbon plates 20, 20 are used as members that are in direct contact with the laminate S, the laminate S has good sliding and stable cladding processing can be performed.

In addition, a heat insulating material 2 is provided inside each push plate 26, 26.
4 and 24, the electric heater 2
Heat from 3 and 23 is blocked here, and heat loss leaking to push plates 26 and 26 can be minimized. Since uniform steel plates 21, 21 are interposed on the outside of each carbon plate 20, 20, even if an uneven load is applied from the push plates 26, 26 side, the uniform plates 21, 21, Due to the action of 21, a uniform load can be applied to the laminate S in a plane.

In addition, the laminate S in this housing 17 is heated to a high temperature of about 800°C, so it tends to oxidize very easily.
7 and the communicating path 32 connected thereto are filled with a reducing atmosphere such as H ₂ , so that the laminate S
will not oxidize.

When replacing the atmosphere inside this housing 17 and the housing 29 of the cooling section (to be described later) with H ₂ at the start of operation, in order to prevent explosions, replace the atmosphere with an inert gas such as CO ₂ before replacing the atmosphere with air. is removed and then this CO ₂ is replaced with H ₂ .
This method is also used to remove H ₂ from the housing during shutdown.

Incidentally, the heating time and pressurizing time in the cladding forming section 2 are adjusted by adjusting the rotational speed of the drive rollers 11, that is, the moving speed of the laminate S.

The plate subjected to the cladding treatment is carried out from the outlet 19 of the cladding forming section 2, passes through the communication passage 32 filled with a reducing atmosphere, and is then introduced into the cooling section 3. In this cooling section 3,
Cold water as a refrigerant flows into the laminated plate S in the cooling jackets 34, 34 provided above and below the carbon plates 33, 33.
The carbon is passed in a meandering manner along the conveyance direction, and the relatively high-temperature clad plate sliding between the carbon plates 33 is indirectly cooled by the cold heat, and heat treated in a bright state. It's summery.

In this case, the cooling temperature of the laminate S to the clad plate h is adjusted to 100° C. or less at the outlet 31 of the cooling section 3. This is because when the temperature of the cladding plate h is below 100°C, it becomes difficult to oxidize. Therefore, since the temperature of the cladding plate h passing through the cooling section 3 is still over 100°C, a reducing atmosphere is filled in the housing 29 in the same way as the cladding forming section 2 in order to prevent oxidation. I'll keep it.

The clad plate h as a final product discharged from the discharge port 31 of the cooling section 3 is sequentially wound up by a winding drum 14 located on the downstream side.

As described above, in this embodiment, as a member that directly contacts and presses the laminate S to be treated,
We used carbon plates with good sliding properties, so even if the base material previously formed into a thin strip and different metals were laminated and heated and pressed, sliding movement between the carbon plates would not occur. can be done.

As a result, clad plates can be continuously produced using materials (base material, etc.) that have been previously formed into thin strips.

In the above example, the hot rolling and cooling treatments are each carried out only once, but in subsequent steps, multiple stages of homogeneous clad forming sections and cooling sections are provided, and similar treatments are carried out continuously. You may also do so.

[Effects of the Invention] In summary, according to the present invention, the following excellent effects can be achieved.

(1) By sliding and heating the laminate to be treated in a reducing atmosphere while compressing it with carbon plates from the stacking direction, the laminate is heated until the intermediate alloy layer is formed without damaging the laminate. It is possible to form a clad plate by pressing for a period of time, and by cooling the clad plate in a bright state in a reducing atmosphere, continuous production of clad plates, which has not been possible in the past, becomes possible.

(2) Therefore, since it has become possible to continuously manufacture clad plates, productivity can be greatly improved compared to conventional methods, and it is also possible to manufacture long products that were previously impossible. .

(3) Since thin sheets that have been extremely rolled in advance can be used as the base material and the dissimilar metal sheet (skin metal sheet), it is possible to eliminate the rolling process of the manufactured clad plate, or to reduce the number of times of rolling. This can significantly reduce the number of steps as a whole.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an apparatus for carrying out the continuous manufacturing method of dissimilar metal clad plates according to the present invention, Fig. 2 is a partially cutaway plan view showing the cladding forming part, and Fig. 3 is an enlarged view of section A in Fig. 2. 4 is a longitudinal sectional view showing the cooling section, and FIG. 5 is a partially cutaway perspective view showing the internal structure of the cooling section. In addition, in the figure, 1 is a transfer means, 2 is a clad molding part,
3 is a cooling section, 17 is a housing for the clad molding section, 20 is a carbon plate for the clad molding section, 23 is an electric heater, 25 is a pressing means, 29 is a housing for the cooling section, 33 is a carbon plate for the cooling section, and 34 is a cooling section. It's a jacket.

Claims (1)

[Claims] 1 In a continuous manufacturing method for dissimilar metal clad plates in which dissimilar metal plates are laminated on the surface of a base material and then heat-treated to clad them, the base material formed into a strip shape and dissimilar metal plates are stacked and laminated. This is transferred to the cladding forming section, where the laminate to be treated is compressed by carbon plates from the stacking direction in a reducing atmosphere, and the laminate to be treated is heated for a predetermined period of time while being slid and transferred. A continuous manufacturing method for dissimilar metal clad plates, characterized in that an intermediate alloy layer is formed between the laminate plates to form a clad plate, and the plate carried out from the clad forming section is cooled in a bright state in a reducing atmosphere. .