Rolling method for improving bonding strength of bimetal composite plate

Abstract

The invention discloses a rolling method for improving the bonding strength of a bimetal composite plate, and relates to the technical field of bimetal composite plate rolling. S2, coining a tooth groove; s3, rolling the composite board; and S4, cooling and finishing. According to the rolling method for improving the bonding strength of the bimetal composite plate, the two metal plates are heated, the tooth grooves are formed in the binding faces of the two metal plates in an impressing mode, the faces, provided with the tooth grooves, of the two metal plates are attached to each other and are meshed based on the tooth grooves, and the two metal plates are attached to each other more tightly based on the increase of the attaching area, so that the bonding strength of the bimetal composite plate is improved. And meanwhile, the two metal plates are welded through heating, so that the bonding strength of connection between the two metal plates is improved, the service life of the bimetal composite plate finished product obtained after rolling finishing is prolonged while the bimetal composite plate finished product has the respective advantages of the two metal plates at the same time, and the situation that the metal plates fall off after long-term use is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of bimetallic composite plate rolling, in particular to a rolling method for improving the bonding strength of a bimetallic composite plate. Background Art

[0002] Bimetallic composite plate is a widely used metal composite material, which is widely used in construction, automobile and other fields. Bimetallic composite plate is to combine two different metal plates into one. The preparation process is to pour the metal liquid of the sub-plate on the surface of the substrate and then roll it after cooling.

[0003] The existing preparation process of bimetallic composite plates is to pour the molten metal of the sub-plate onto the surface of the substrate and then roll it. During this process, the metal liquid and the substrate surface are not well adhered to each other, and the sub-plate is prone to cracking during rolling. In addition, the surface layer formed by the molten metal of the sub-plate is prone to fall off after long-term use. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a rolling method for improving the bonding strength of a bimetallic composite plate, which solves the problem that the existing bimetallic composite plate preparation process proposed in the above background technology is to pour the molten metal of the sub-plate onto the surface of the substrate and then roll it. During this process, the metal liquid and the substrate surface are not well adhered to each other, and the sub-plate is prone to cracking during rolling. In addition, the surface layer formed by the molten metal of the sub-plate of the bimetallic composite plate prepared in this way is prone to fall off after long-term use.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A rolling method for improving the bonding strength of a bimetallic composite plate comprises the following operating steps:

[0006] S1. Preheating of metal plate:

[0007] Two metal plates to be rolled are heated by a heating device, and the surfaces of the metal plates are softened by the heating, thereby obtaining two softened metal plates;

[0008] S2. Imprinting tooth groove:

[0009] The two softened metal plates obtained in step S1 are placed in a compression molding device, with the surfaces to be connected of the two softened metal plates facing upward, and the compression molding device is used to stamp serrated grooves on the connecting surfaces of the metal plates, thereby obtaining two serrated metal plates;

[0010] S3. Composite plate rolling:

[0011] The two serrated metal plates obtained in step S2 are bonded together and sent to a rolling device for rolling. The temperature is kept constant during rolling, and a preliminary bimetallic composite plate can be obtained after rolling.

[0012] S4, cooling and trimming:

[0013] In step S3, the preliminary bimetallic composite plate obtained after rolling is cooled by air, and then trimmed at the edge by cutting equipment, and naturally cooled after trimming, so as to obtain a finished bimetallic composite plate.

[0014] Optionally, in step S1, the heating temperature of the two metal plates is the melting point temperature corresponding to the material of the metal plates, and the heating time is controlled within 10-20 minutes.

[0015] Optionally, when the two metal plates are heated, the upper surface, the lower surface and the two side surfaces are restricted, that is, plates with a melting point higher than that of the two metal plates are attached to the upper surface, the lower surface and the two side surfaces of the metal plates to prevent the metal plates from expanding and deforming due to heat.

[0016] Optionally, in step S2, the bottom surface of the molding piece of the compression molding device has a serrated structure, and the serrated grooves of the two metal plates embossed with the serrated grooves engage with each other after being bonded together.

[0017] Optionally, in the step S2, the two metal plates are still in a heated state when undergoing the compression molding operation of the compression molding device, and the temperature at this time is two-thirds of the melting point of the metal plates.

[0018] Optionally, in the step S3, after the two serrated metal plates are stacked and bonded together, the serrated grooves engage with each other, and the side edges of the two metal plates are flush after being stacked.

[0019] Optionally, in step S3, the temperature during rolling is controlled to be two-thirds of the melting point of the metal plate with the lower melting point among the two metal plates.

[0020] Optionally, in step S3, the lower roller of the rolling equipment is dumbbell-shaped, that is, the middle diameter of the lower roller is smaller than the diameter at both ends, and the upper roller and the lower roller fit together, and the two metal plates are attached to the sides of the lower roller during rolling to prevent the metal plates from deforming during rolling.

[0021] Optionally, in the step S4, during air cooling, the wind speed is controlled at 30-55 m / min, and the fan carries water mist for cooling, and the temperature of the preliminary bimetallic composite plate after cooling is controlled at one fifth of the melting point temperature of the lowest metal plate.

[0022] The present invention provides a rolling method for improving the bonding strength of a bimetallic composite plate, which has the following beneficial effects:

[0023] The rolling method for improving the bonding strength of the bimetallic composite plate heats two metal plates and embosses teeth grooves on the bonding surfaces of the two metal plates, so that the two metal plates are bonded to each other on one side with the teeth grooves and mesh with each other based on the teeth grooves. Based on the expansion of the bonding area, the two metal plates are more closely bonded together, and the two metal plates are welded by heating, which is beneficial to improving the bonding strength of the connection between the two metal plates. The bimetallic composite plate product obtained after rolling and trimming has the advantages of each of the two metal plates while improving the service life, which is beneficial to preventing the metal plates from falling off after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the preparation process of the present invention. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] See also Figure 1 The present invention provides a technical solution: a rolling method for improving the bonding strength of a bimetallic composite plate, comprising the following steps:

[0027] S1. Preheating of metal plate:

[0028] Two metal plates to be rolled are heated by a heating device, and the surfaces of the metal plates are softened by the heating, thereby obtaining two softened metal plates;

[0029] S2. Imprinting tooth groove:

[0030] The two softened metal plates obtained in step S1 are placed in a compression molding device, with the surfaces to be connected of the two softened metal plates facing upward, and the compression molding device is used to stamp serrated grooves on the connecting surfaces of the metal plates, thereby obtaining two serrated metal plates;

[0031] S3. Composite plate rolling:

[0032] The two serrated metal plates obtained in step S2 are bonded together and sent to a rolling device for rolling. The temperature is kept constant during rolling, and a preliminary bimetallic composite plate can be obtained after rolling.

[0033] S4, cooling and trimming:

[0034] In step S3, the preliminary bimetallic composite plate obtained after rolling is cooled by air, and then trimmed at the edge by cutting equipment, and naturally cooled after trimming, so as to obtain a finished bimetallic composite plate.

[0035] In step S1, the heating temperature of the two metal plates is the melting point temperature corresponding to the material of the metal plates, and the heating time is controlled within 10-20 minutes.

[0036] When the two metal plates are heated, the upper surface, lower surface and both side surfaces are restricted, that is, plates with a melting point higher than that of the two metal plates are attached to the upper surface, lower surface and both side surfaces of the metal plates to prevent the metal plates from expanding and deforming due to heat.

[0037] In step S2, the bottom surface of the molding part of the compression molding device has a serrated structure, and the serrated grooves of the two metal plates embossed with the serrated grooves are engaged with each other after being bonded together.

[0038] In step S2, the two metal plates are still in a heated state when undergoing compression molding by the compression molding device, and the temperature is two-thirds of the melting point of the metal plates.

[0039] In step S3, after the two serrated metal plates are stacked and bonded, the serrated grooves engage with each other, and the sides of the two metal plates are flush after being stacked.

[0040] In step S3, the temperature during rolling is controlled to be two-thirds of the melting point of the metal plate with the lower melting point among the two metal plates.

[0041] In step S3, the lower roller of the rolling equipment is dumbbell-shaped, that is, the diameter in the middle of the lower roller is smaller than the diameter at both ends, and the upper roller fits with the lower roller. The two metal plates are attached to the sides of the lower roller during rolling to prevent the metal plates from deforming during rolling.

[0042] In step S4, during air cooling, the wind speed is controlled at 30-55 m / min, and the fan carries water mist for cooling, and the temperature of the preliminary bimetallic composite plate is controlled at one fifth of the melting point temperature of the lowest metal plate after cooling;

[0043] The rolling method for improving the bonding strength of the bimetallic composite plate heats two metal plates and embosses teeth grooves on the bonding surfaces of the two metal plates, so that the two metal plates are bonded to each other on one side with the teeth grooves and mesh with each other based on the teeth grooves. Based on the expansion of the bonding area, the two metal plates are more closely bonded together, and the two metal plates are welded by heating, which is beneficial to improving the bonding strength of the connection between the two metal plates. The bimetallic composite plate product obtained after rolling and trimming has the advantages of each of the two metal plates while improving the service life, which is beneficial to preventing the metal plates from falling off after long-term use.

[0044] In summary, the rolling method for improving the bonding strength of the bimetallic composite plate comprises the following steps when used:

[0045] S1. Preheating of metal plates: two metal plates to be rolled are heated by a heating device, and the surfaces of the metal plates are softened by the heating, thereby obtaining two softened metal plates;

[0046] S2, embossing tooth grooves: placing the two softened metal plates obtained in step S1 in a compression molding device, with the surfaces to be connected of the two softened metal plates facing upward, and embossing sawtooth tooth grooves on the connecting surfaces of the metal plates by the compression molding device, thereby obtaining two sawtooth surface metal plates;

[0047] S3, composite plate rolling: the two serrated metal plates obtained in step S2 are bonded together and sent to a rolling device for rolling. The temperature is kept constant during rolling, and a preliminary bimetallic composite plate can be obtained after rolling;

[0048] S4, cooling and trimming: the preliminary bimetallic composite plate obtained after rolling in step S3 is cooled by air and then trimmed at the edge by cutting equipment, and then naturally cooled after trimming, so as to obtain a finished bimetallic composite plate;

[0049] The rolling method for improving the bonding strength of the bimetallic composite plate heats two metal plates and embosses teeth grooves on the bonding surfaces of the two metal plates, so that the two metal plates are bonded to each other on one side with the teeth grooves and mesh with each other based on the teeth grooves. Based on the expansion of the bonding area, the two metal plates are more closely bonded together, and the two metal plates are welded by heating, which is beneficial to improving the bonding strength of the connection between the two metal plates. The bimetallic composite plate product obtained after rolling and trimming has the advantages of each of the two metal plates while improving the service life, which is beneficial to preventing the metal plates from falling off after long-term use.

[0050] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A rolling method for improving the bonding strength of a bimetallic composite plate, characterized in that: The following steps are included: S1. Preheating of metal plate: Two metal plates to be rolled are heated by a heating device, and the surfaces of the metal plates are softened by the heating, thereby obtaining two softened metal plates; S2. Imprinting tooth groove: The two softened metal plates obtained in step S1 are placed in a compression molding device, with the surfaces to be connected of the two softened metal plates facing upward, and the compression molding device is used to stamp serrated grooves on the connecting surfaces of the metal plates, thereby obtaining two serrated metal plates; S3. Composite plate rolling: The two serrated metal plates obtained in step S2 are bonded together and sent to a rolling device for rolling. The temperature is kept constant during rolling, and a preliminary bimetallic composite plate can be obtained after rolling. S4, cooling and trimming: In step S3, the preliminary bimetallic composite plate obtained after rolling is cooled by air, and then trimmed at the edge by cutting equipment, and naturally cooled after trimming, so as to obtain a finished bimetallic composite plate.

2. A rolling method for improving the bonding strength of a bimetallic composite plate according to claim 1, characterized in that: In the step S1, the heating temperature of the two metal plates is the melting point temperature corresponding to the material of the metal plates, and the heating time is controlled within 10-20 minutes.

3. A rolling method for improving the bonding strength of a bimetallic composite plate according to claim 2, characterized in that: When the two metal plates are heated, the upper surface, the lower surface and the side surfaces are restricted, that is, plates with a melting point higher than that of the two metal plates are attached to the upper surface, the lower surface and the side surfaces of the metal plates to prevent the metal plates from expanding and deforming due to heat.

4. A rolling method for improving the bonding strength of a bimetallic composite plate according to claim 1, characterized in that: In the step S2, the bottom surface of the molding part of the compression molding device has a serrated structure, and the serrated grooves of the two metal plates embossed with the serrated grooves are engaged with each other after being bonded together.

5. A rolling method for improving the bonding strength of a bimetallic composite plate according to claim 1, characterized in that: In the step S2, the two metal plates are still in a heated state when undergoing the compression molding operation of the compression molding device, and the temperature at this time is two-thirds of the melting point of the metal plates.

6. A rolling method for improving the bonding strength of a bimetallic composite plate according to claim 1, characterized in that: In the step S3, after the two serrated metal plates are stacked and bonded together, the serrated grooves engage with each other, and the sides of the two metal plates are flush after being stacked.

7. A rolling method for improving the bonding strength of a bimetallic composite plate according to claim 1, characterized in that: In the step S3, the temperature during rolling is controlled to be two-thirds of the melting point of the metal plate with the lower melting point among the two metal plates.

8. A rolling method for improving the bonding strength of a bimetallic composite plate according to claim 1, characterized in that: In the step S3, the lower roller of the rolling equipment is dumbbell-shaped, that is, the diameter of the middle part of the lower roller is smaller than the diameter of the two ends, and the upper roller fits with the lower roller. The two metal plates are attached to the sides of the lower roller during rolling to prevent the metal plates from deforming during rolling.

9. A rolling method for improving the bonding strength of a bimetallic composite plate according to claim 1, characterized in that: In the step S4, during air cooling, the wind speed is controlled at 30-55 m / min, and the fan carries water mist for cooling, and the temperature of the preliminary bimetallic composite plate after cooling is controlled at one fifth of the melting point temperature of the lowest metal plate.

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