Composite metal sheet and processing method

Abstract

The present invention discloses a composite metal sheet and a processing method, which relates to the technical field of composite metal materials. The composite metal sheet includes: an outer metal layer, a middle connecting metal and an inner metal layer, a plurality of grooves are formed between the middle connecting metal and the inner metal layer; an alloy layer is formed between the outer metal layer and the middle connecting metal, and a hardened portion is formed at the position corresponding to the groove on the composite metal sheet. The hardened portion extends from the connection position between the inner metal layer and the middle connecting metal to the alloy layer, and the hardened portion is partially embedded in the alloy layer. Through multi-layer metal hot pressing, a plurality of grooves are formed by pressing, and the hardened portion is formed by laser quenching, so as to improve the connection stability between multiple metal sheets and improve the reliability of the composite material.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of composite metal materials, and in particular to a composite metal plate and a processing method thereof. Background Art

[0002] Existing cooking utensils are generally made of multiple layers of metal to form a composite material. The multiple layers of metal sheets are stacked and pressed into shape by hot pressing. A chemical coating is applied to the surface of the inner metal layer to form a non-stick layer structure, or an uneven structure is formed on the surface of the inner metal layer by chemical etching, thereby reducing the contact area between the inner surface of the cooker and the food, thereby achieving a non-stick effect.

[0003] Currently, the non-stick structure of composite metal materials of cookware is prone to chemical coating shedding or uneven chemical etching, which affects the reliability of the composite material. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art. The present invention provides a composite metal plate and a processing method. It is formed by hot pressing multiple layers of metal, and a plurality of grooves are formed by pressing, and a hardened part is formed by laser quenching, so as to improve the connection stability between multiple metal sheets and improve the reliability of the composite material.

[0005] The present invention provides a composite metal plate, the composite metal plate comprising: an outer metal layer, a middle connecting metal and an inner metal layer, wherein a plurality of grooves are formed between the middle connecting metal and the inner metal layer;

[0006] An alloy layer is formed between the outer metal layer and the middle connecting metal, and a hardened portion is formed on the composite metal plate at a position corresponding to the groove. The hardened portion extends from the connection position between the inner metal layer and the middle connecting metal to the alloy layer, and the hardened portion is partially embedded in the alloy layer.

[0007] Furthermore, the hardened portion is in a cone structure, and the wire diameter of the cone structure decreases gradually from the connection position between the inner layer metal and the middle connecting metal toward the alloy layer.

[0008] Furthermore, the outer metal layer is a stainless steel layer, and the middle connecting metal is aluminum metal;

[0009] The inner metal layer is made of alloy.

[0010] Furthermore, the alloy material of the inner metal layer contains one or more metal elements of Ti, Cu, and Mu.

[0011] Furthermore, the groove diameter is d, and the value range of d is 0.1mm≤h≤0.5mm.

[0012] Furthermore, the depth of the groove is h, and the value range of h is 0.5 μm≤h≤2.5 μm.

[0013] The present invention also provides a method for processing a composite metal sheet material, the processing method is used to prepare the composite metal sheet material, and the processing method comprises:

[0014] S11: stacking a plurality of metal sheets and placing them in a hot pressing device, and monitoring a first heating state image of the plurality of metal sheets in real time using a thermal imaging device;

[0015] S12: adjusting the heating temperature of each heating component in the hot pressing device according to the first heating state diagram, and obtaining an initial composite workpiece based on the hot pressing device;

[0016] S14: inputting the initial composite workpiece into a pressing device, and forming a plurality of grooves on the initial composite workpiece by pressing the pressing device to obtain a semi-finished workpiece;

[0017] S15: Laser quenching is performed at each groove position of the semi-finished workpiece by a laser heating device to obtain a composite metal sheet.

[0018] Furthermore, adjusting the heating temperature of each heating component in the hot pressing device according to the first heating state diagram, and obtaining the initial composite workpiece based on the hot pressing device includes:

[0019] According to the materials of the plurality of metal sheets, an outer metal layer, a middle connecting metal layer and an inner metal layer are set, and a first heat detection threshold is set based on the metal melting temperature of the middle connecting metal layer;

[0020] Acquire heating conditions of the plurality of metal sheets according to the first heating state diagram, and adjust the heating temperature of each heating component in combination with the first heat detection threshold;

[0021] Based on the first heating state diagram and a first heat detection threshold, an initial composite workpiece whose heating amount reaches the first heat detection threshold is obtained.

[0022] Furthermore, the laser quenching is performed at each groove position of the semi-finished workpiece by a laser heating device to obtain a composite metal sheet, which includes:

[0023] Acquire the second and first heating state images of the semi-finished workpiece by a thermal imaging device, and acquire the plate thickness and the plate heat at the groove position of the semi-finished workpiece based on the second and first heating state images;

[0024] The laser frequency and laser response time of the laser heating device are adjusted according to the thickness of the plate and the heat of the plate.

[0025] Furthermore, the processing method also includes:

[0026] After the laser quenching of the semi-finished workpiece is completed, the semi-finished workpiece is cooled, and the cooling time is adjusted according to the heating temperature of the semi-finished workpiece after the laser quenching.

[0027] The present invention provides a composite metal plate material and a processing method. After overlapping multiple layers of metal sheets, the multiple layers of metal are hot-pressed and formed, and a plurality of grooves are formed by pressing the composite material formed by the multiple layers of metal. Laser quenching is then performed to form a hardened portion, thereby improving the connection stability between the multiple metal sheets and improving the reliability of the composite material. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the structure of a composite metal plate in an embodiment of the present invention;

[0029] Figure 2 is a flow chart of a method for processing a composite metal plate according to an embodiment of the present invention;

[0030] Figure 3 It is a schematic diagram of the preparation process of the composite metal plate in an embodiment of the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Embodiment 1:

[0033] Figure 1 A schematic structural diagram of a composite metal plate in an embodiment of the present invention is shown, wherein the composite metal plate is used to prepare a cooker device. The composite metal plate can meet the use requirements of the cooker for heating food. The composite metal plate comprises: an outer metal 3, a middle connecting metal 2 and an inner metal 1. A plurality of grooves 6 are formed at the connection position between the middle connecting metal 2 and the inner metal 1, that is, the inner metal 1 is recessed inward to form a plurality of grooves 6 distributed in an array. The plurality of grooves 6 can reduce the contact area between the surface of the inner metal 1 and the food. The cooker device prepared based on the composite metal plate can reduce the contact area between the food and the inner surface of the cooker during use of the cooker, thereby reducing the risk of food sticking to the pan when the cooker is heated and improving the non-stick performance of the cooker for heating food.

[0034] Specifically, an alloy layer 4 is formed between the outer metal 3 and the middle connecting metal 2. Based on the alloy layer 4, the connection stability between the outer metal 3 and the middle connecting metal 2 is improved. A hardened portion 5 is formed on the composite metal plate at the position corresponding to the groove 6. The hardened portion 5 extends from the connection position between the inner metal 1 and the middle connecting metal 2 to the alloy layer 4, and the hardened portion 5 is partially embedded in the alloy layer 4. Based on the hardened portion 5 being embedded in the alloy layer 4, the connection reliability between the inner metal 1, the middle connecting metal 2 and the outer metal 3 is improved, so that the inner metal 1, the middle connecting metal 2 and the outer metal 3 can be tightly pressed together to form an integrated structure, thereby effectively improving the thermal conductivity performance of the composite metal plate and meeting the use requirements of cooking devices.

[0035] Specifically, the hardened portion 5 is a conical structure, and the wire diameter of the conical structure decreases from the connection position between the inner metal layer 1 and the middle connecting metal 2 toward the alloy layer 4. The tip of the conical structure of the hardened portion 5 is embedded in the alloy layer 4, which can improve the connection stability between the inner metal layer 1 corresponding to the groove 6 position and the outer metal layer 3.

[0036] Furthermore, the heat transfer efficiency between the alloy layer 4 and the middle connecting metal 2 and the inner layer metal 1 is higher than the heat transfer efficiency of the hardened portion 5. The cooking device prepared based on the composite metal plate can effectively heat the food based on the raised structure formed between the plurality of grooves 6.

[0037] Furthermore, based on the heat transfer effect of the hardened portion 5 reducing the position of the groove 6, the inner layer metal 1 corresponds to the position of the groove 6, forming a situation where the temperature of the side wall of the groove 6 is higher than the bottom of the groove 6. During the use of the cooker device, the heat of the side wall of the groove 6 based on the position of the groove 6 converges to the bottom of the groove 6, which can increase the accumulation of heat in the cooker at the position of the groove 6, thereby improving the heating effect of the cooker device, and effectively reducing the contact area between the bottom surface of the cooker device and the food, reducing the risk of food sticking to the pot.

[0038] Specifically, the outer metal layer 3 is a stainless steel layer, so that the outer metal layer 3 has good corrosion resistance and rust prevention effects to meet the daily use needs of cooking utensils formed by composite metal plates. The middle connecting metal 2 is aluminum metal, which has good thermal conductivity and the melting point of aluminum metal is 660°C, which can improve the convenience of heating and hot pressing connection between the middle connecting metal 2, the outer metal layer 3 and the inner metal layer 1.

[0039] Furthermore, the outer metal layer 3 may be a magnetic stainless steel layer, so that the outer metal layer 3 has good electromagnetic thermal conductivity, so that the cookware product prepared based on the composite metal plate can be adapted for use in an induction cooker.

[0040] The inner metal 1 is made of alloy material. Preferably, the inner metal 1 can be stainless steel metal. The stainless steel metal is food-grade stainless steel material, such as 304 stainless steel, 316 stainless steel, 430 stainless steel, etc., which can meet the food processing needs. The inner metal 1 can also be made of alloy material. The alloy material ensures that the inner metal 1 has good thermal conductivity to meet the food processing needs.

[0041] Furthermore, the alloy material of the inner metal layer 1 contains one or more metal elements of Ti, Cu, and Mu.

[0042] Furthermore, the groove diameter of the groove 6 is d, and the value range of d is 0.1mm≤h≤0.5mm. The composite metal plate is stamped by stamping equipment to form a plurality of grooves 6 on the composite metal plate, so that the surface of the inner metal layer 1 of the composite metal plate forms an uneven structure, thereby meeting the improvement of the non-stick performance of the cookware.

[0043] Furthermore, the depth of the groove 6 is h, and the value range of h is 0.5 μm≤h≤2.5 μm.

[0044] An embodiment of the present invention provides a composite metal plate material. After overlapping multiple layers of metal sheets, the multiple layers of metal are hot-pressed and formed into a composite material formed by pressing the multiple layers of metal. A hardened portion 5 is formed by laser quenching to improve the connection stability between the multiple metal sheets and the reliability of the composite material.

[0045] Embodiment 2:

[0046] Figure 2 A flow chart of a processing method of a composite metal sheet according to an embodiment of the present invention is shown. The processing method is used to prepare the composite metal sheet, and the processing method includes:

[0047] S11: stacking a plurality of metal sheets and placing them in a hot pressing device, and monitoring a first heating state diagram of the plurality of metal sheets in real time based on a thermal imaging device.

[0048] The hot pressing equipment can be a hot pressing roller equipment, which performs hot pressing and cladding of coiled metal by roller pressing, thereby improving the convenience of hot pressing processing of metal sheets. The hot pressing equipment can also be a plane hot pressing equipment, which performs hot pressing and cladding of multiple metal sheets based on a hot pressing mechanism, so as to control the hot pressing temperature and hot pressing uniformity of multiple metal sheets, thereby improving the processing quality of composite metal sheets.

[0049] When multiple metal sheets are subjected to hot pressing processing, the heating conditions of the metal sheets in a stacked state are monitored by thermal imaging equipment to obtain the heating conditions of the multiple metal sheets so as to adjust the heating temperature of the hot pressing equipment according to the heating conditions of the multiple metal sheets, thereby meeting the composite hot pressing forming requirements of the multiple metal sheets.

[0050] S12: adjusting the heating temperature of each heating component in the hot pressing device according to the first heating state diagram, and obtaining an initial composite workpiece based on the hot pressing device.

[0051] Specifically, the heating conditions of the plurality of metal sheets are obtained based on the first heating state diagrams of the plurality of metal sheets, and the heat energy conversion efficiency of the plurality of metal sheets is extracted based on the heating conditions. The heat of the plurality of metal sheets is obtained according to the first heating state diagram, and the heat energy conversion efficiency of the metal sheets is calculated in combination with the heating time of the hot pressing device. The heating temperature of the hot pressing device is adjusted based on the heat energy conversion efficiency of the metal sheets, so that the hot pressing device can meet the hot pressing processing of the plurality of metal sheets.

[0052] Specifically, according to the materials of multiple metal sheets, an outer metal layer, a middle connecting metal and an inner metal layer are set, and a first heat detection threshold is set based on the metal melting temperature of the middle connecting metal, so that when several of the metal sheets reach the first heat detection threshold, the middle connecting metal can reach a molten state or a semi-molten state, thereby forming an alloy layer between the middle connecting metal and the outer metal layer, thereby improving the structural connection stability between the middle connecting metal and the outer connecting metal.

[0053] The heating conditions of multiple metal sheets are obtained according to the first heating state diagram, the heating temperature of each heating component is adjusted in combination with the first heat detection threshold, and the hot pressing equipment is used to hot press the multiple metal sheets. After the hot pressing operation has been carried out for a period of time, the heating conditions of the multiple metal sheets are monitored and analyzed through the first heating state diagram.

[0054] Based on the first heating state diagram and a first heat detection threshold, an initial composite workpiece whose heating amount reaches the first heat detection threshold is obtained.

[0055] Specifically, based on the first heating state diagram, the heat absorption efficiency and temperature rise efficiency of several metal sheets are obtained, and according to the first heat detection threshold and the temperature rise efficiency of several metal sheets, the heating temperature of each hot pressing component of the hot pressing equipment is adjusted, so that several metal sheets can complete the hot pressing processing requirements within a preset time when connected to the hot pressing equipment, and avoid excessive heating of several metal sheets, thereby improving the reliability of hot pressing forming of several metal sheets.

[0056] Furthermore, based on the first heating state diagram, the real-time change state of the heat of several of the metal sheets can be obtained, thereby detecting whether several of the metal sheets have reached the first heat detection threshold, so as to timely adjust the hot pressing operation of the hot pressing equipment to ensure the hot pressing effect of the several metal sheets.

[0057] Specifically, in the present embodiment, the hot pressing equipment is formed based on the cooperation of several groups of hot pressing rollers, several metal sheets are input into the hot pressing equipment based on several metal coils, and several metal sheets are overlapped and sequentially passed through several groups of hot pressing rollers for hot pressing, and several groups of hot pressing rollers can flatten the coils of metal sheets and heat several metal sheets. After the several metal sheets are overlapped, they pass through several groups of hot pressing rollers in sequence, which can gradually heat up the several metal sheets and improve the heating stability and reliability of the metal sheets.

[0058] S14: The initial composite workpiece is input into a pressing device, and a plurality of grooves are formed on the initial composite workpiece by pressing the pressing device to obtain a semi-finished workpiece.

[0059] Specifically, the pressing device can be configured as a stamping device, and a plurality of bumps are arranged on the stamping head of the stamping device, so that when the stamping device performs stamping processing on the initial composite workpiece, a plurality of grooves can be formed on the surface of the initial composite workpiece.

[0060] The initial composite workpiece is placed in a stamping device with the inner metal layer facing upward, so that the stamping head of the stamping device can stamp the inner metal layer of the initial composite workpiece to form the plurality of grooves, thereby obtaining the semi-finished workpiece.

[0061] Specifically, the pressing device can also be configured as a rolling assembly, which is provided with an upper pressing roller and a lower pressing roller to press the initial composite workpiece, and by providing a plurality of protrusions on the circumferential outer wall of the upper pressing roller, so that when the rolling assembly presses the initial composite workpiece, a plurality of grooves can be formed on the inner metal surface of the initial composite workpiece.

[0062] S15: Laser quenching is performed at each groove position of the semi-finished workpiece by a laser heating device to obtain a composite metal sheet.

[0063] The semi-finished workpiece is input into a laser heating device, and the groove position of the semi-finished workpiece is laser quenched by the laser heating device, so that the inner metal and the middle connecting metal at the groove position of the semi-finished workpiece are melted and connected, and a conical melting state is formed inside the corresponding groove position of the semi-finished workpiece based on the laser heating of the laser heating device, and a hardened part is formed based on cooling and temperature recovery, thereby obtaining the composite metal sheet.

[0064] Furthermore, the semi-finished workpiece is subjected to heat detection based on the thermal imaging device to obtain a second heating state diagram of the semi-finished workpiece, and the heat data of the semi-finished workpiece after laser quenching is obtained based on the second heating state diagram. The cooling time and cooling temperature of the cooling device are adjusted according to the heat data to obtain the composite metal sheet.

[0065] Embodiment three:

[0066] Figure 3 The schematic diagram of the preparation process of the composite metal plate in the embodiment of the present invention is shown. The preparation process includes:

[0067] S101: Cutting of coiled material.

[0068] Select metal coils according to processing requirements, set the metal coils on an uncoiling device, uncoil the metal coils based on the uncoiling device, select food-grade stainless steel as the inner metal, select aluminum metal as the middle connecting metal, and select stainless steel as the outer metal. By adjusting the discharging direction of the uncoiling device, the inner metal, the middle connecting metal and the outer metal are overlapped in sequence from top to bottom, so as to hot-press a plurality of metal sheets to form the composite metal sheet.

[0069] S102: Preheating the sheet.

[0070] The output ends of the plurality of unwinding devices are connected to the preheating device, so that the plurality of metal sheets can enter the preheating device for preheating. The preheating device may be provided with a conveyor belt mechanism, which drives the plurality of metal sheets to move in the preheating device, and the preheating device may be provided with a plurality of electric heating devices, which preheat the metal sheets, so that the middle connecting metal has viscosity after preheating, so that the middle connecting metal and the outer metal and the inner metal can be hot-pressed and laminated.

[0071] Furthermore, the preheating temperature of the middle connecting metal is set between 430° C. and 530° C. to ensure that the surface of the middle connecting metal has a good adhesive effect so that the middle connecting metal can be compositely connected with the outer metal and the inner metal.

[0072] S103: Sheet stacking.

[0073] The various metal sheets of the preheating equipment are input into the pressing roller group, and based on the cooperation of the upper pressing roller and the lower pressing roller of the pressing roller group, the various metal sheets are pressed from top to bottom according to the arrangement of the inner layer metal, the middle connecting metal and the outer layer metal, so that the inner layer metal is bonded to the middle connecting metal, and the outer layer metal is bonded to the middle connecting metal, that is, the outer layer metal is connected to the inner layer metal based on the middle connecting metal.

[0074] S104: Heat monitoring.

[0075] The metal composite material after pressing is input into the hot pressing equipment, and the heat of the metal composite material entering the hot pressing equipment is monitored based on the thermal imaging equipment to obtain a first heating state diagram of several metal sheets, and the heat of multiple metal sheets is obtained according to the first heating state diagram. In combination with the heating time of the hot pressing equipment, the heat energy conversion efficiency of the metal sheets is calculated, and the heating temperature of the hot pressing equipment is adjusted based on the heat energy conversion efficiency of the metal sheets, so that the hot pressing equipment can meet the hot pressing processing of multiple metal sheets.

[0076] The temperature of the metal composite material is extracted according to the first heating state diagram, the first heating state diagram is converted into a gray value diagram, and a weighted calculation is performed based on the color component to obtain an equivalent brightness value Y of the gray value diagram. The maximum value of the temperature reading is taken in combination with the reading temperature value range of the thermal imaging device. and temperature reading minimum , set the maximum brightness in the grayscale image and minimum brightness , determine the linear relationship function of the thermal energy conversion efficiency of the metal composite material:

[0077]

[0078] in, is the temperature of the metal composite material, is the equivalent brightness, is the coefficient.

[0079] Furthermore, the weighted calculation formula of the equivalent brightness Y is:

[0080]

[0081] in, is the weight coefficient, is the matrix of the red channel, is the matrix of the green channel, is the matrix of the blue channel.

[0082] The weight coefficient can be set according to the specifications of the thermal imaging device or according to an empirical value. In this embodiment, The calculation of heat and temperature change of the composite metal material can be simplified.

[0083] S105: Heat pressing control.

[0084] The heating conditions of multiple metal sheets are obtained according to the first heating state diagram, the heating temperature of each heating component is adjusted in combination with the first heat detection threshold, and the hot pressing equipment is used to hot press the multiple metal sheets. After the hot pressing operation has been carried out for a period of time, the heating conditions of the multiple metal sheets are monitored and analyzed through the first heating state diagram.

[0085] Based on the first heating state diagram and a first heat detection threshold, an initial composite workpiece whose heating amount reaches the first heat detection threshold is obtained.

[0086] Specifically, based on the first heating state diagram, the heat absorption efficiency and temperature rise efficiency of several metal sheets are obtained, and according to the first heat detection threshold and the temperature rise efficiency of several metal sheets, the heating temperature of each hot pressing component of the hot pressing equipment is adjusted, so that several metal sheets can complete the hot pressing processing requirements within a preset time when connected to the hot pressing equipment, and avoid excessive heating of several metal sheets, thereby improving the reliability of hot pressing forming of several metal sheets.

[0087] Furthermore, based on the first heating state diagram, the real-time change state of the heat of several of the metal sheets can be obtained, thereby detecting whether several of the metal sheets have reached the first heat detection threshold, so as to timely adjust the hot pressing operation of the hot pressing equipment to ensure the hot pressing effect of the several metal sheets.

[0088] S106: Pressing and molding.

[0089] Specifically, the initial composite workpiece is input into a pressing device, and the initial composite workpiece is pressed and formed based on the pressing device. The pressing device is configured as a pressing roller group, and the initial composite workpiece is pressed by arranging an upper pressing roller and a lower pressing roller in cooperation, and a plurality of protrusions are provided on the circumferential outer wall of the upper pressing roller, so that when the rolling assembly presses the initial composite workpiece, a plurality of grooves can be formed on the inner metal surface of the initial composite workpiece, so that the initial composite workpiece can be pressed and formed along the conveying direction of the production line, thereby obtaining a semi-finished workpiece.

[0090] Furthermore, the lamination roller group is provided with a water flow cooling mechanism, that is, when the lamination roller group is laminating the initial composite workpiece, the lamination roller group is continuously supplied with cooling water by the water flow cooling mechanism for cooling, thereby avoiding adhesion between the lamination roller group and the initial composite workpiece, thereby ensuring the growth lamination processing of the initial composite workpiece.

[0091] S107: Laser quenching.

[0092] The semi-finished workpiece is input into the laser quenching equipment, and the laser quenching equipment is controlled based on the set operating program to perform laser heating on each groove position of the semi-finished workpiece. The laser acts in the groove, so that the position of the semi-finished workpiece corresponding to the groove can be quickly heated up based on the laser heating, so that the middle connecting layer and the inner layer metal at the groove position are in a molten state, and the laser can form a convergence in the middle connecting metal and the inner layer metal.

[0093] Furthermore, since the laser acts on the corresponding groove position from above the semi-finished workpiece, the diameter of the laser melting line inside the groove position decreases from top to bottom, forming a cone structure. The laser reaction time emitted by the laser quenching equipment to the semi-finished workpiece is short, and the energy of the laser convergence is large, which can instantly increase the temperature when the laser contacts the semi-finished workpiece, and the laser action time is short. When the laser quenching equipment completes the laser reaction, the temperature of the semi-finished workpiece can drop instantly, forming a preliminary hardening effect.

[0094] S108: Cooling adjustment.

[0095] The semi-finished workpiece that has completed laser quenching is input into the cooling equipment, and a second heating state diagram of the semi-finished workpiece after laser quenching is obtained based on the thermal imaging equipment. The heat distribution of the semi-finished workpiece after laser quenching is obtained based on the second heating state diagram, and the heat data of each position of the semi-finished workpiece is obtained. The cold air outlet volume of the cooling equipment is adjusted according to the heat data of each position.

[0096] Calculate the heat loss value of the semi-finished workpiece per unit time;

[0097]

[0098] in, is the heat of the semi-finished workpiece at the i-th position, is the average temperature of the semi-finished workpiece, is the heat loss value of the semi-finished workpiece at the i-th position per unit time, is the temperature drop rate of the semi-finished workpiece per unit time, is the specific heat capacity of the semi-finished workpiece at the average temperature, is the mass of the semi-finished workpiece entering the cooling device.

[0099] S109: Polishing.

[0100] The composite metal plate that has completed laser quenching can be polished based on wind power polishing equipment, which can meet the demand for polishing the uneven surface of the composite metal plate and improve the polishing efficiency of the composite metal plate.

[0101] An embodiment of the present invention provides a processing method for a composite metal plate material. After overlapping multiple layers of metal sheets, the multiple layers of metal are hot-pressed and formed, and a plurality of grooves are formed by pressing the composite material formed by the multiple layers of metal. Laser quenching is then performed to form a hardened portion, thereby improving the connection stability between the multiple metal sheets and improving the reliability of the composite material.

[0102] A person skilled in the art may understand that all or part of the steps in the various methods of the above embodiments may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the storage medium may include: a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, etc.

[0103] In addition, the above is a detailed introduction to a composite metal plate and a processing method provided in an embodiment of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A composite metal sheet, characterized in that: The composite metal sheet comprises: an outer metal layer, a middle connecting metal and an inner metal layer, and a plurality of grooves are punched on the inner metal layer of the composite metal sheet after processing by a pressing device, and a plurality of grooves are formed between the middle connecting metal and the inner metal layer; An alloy layer is formed between the outer metal layer and the middle connecting metal. The middle connecting metal is heated to a molten state or a semi-molten state and cooperates with the outer metal layer to form the alloy layer. A hardened portion is formed at a position of the composite metal plate corresponding to the groove. The hardened portion extends from the connection position between the inner metal layer and the middle connecting metal to the alloy layer, and the hardened portion is partially embedded in the alloy layer. The processing method of the composite metal sheet comprises: S11: stacking a plurality of metal sheets and placing them in a hot pressing device, and monitoring a first heating state image of the plurality of metal sheets in real time using a thermal imaging device; S12: adjusting the heating temperature of each heating component in the hot pressing device according to the first heating state diagram, and obtaining an initial composite workpiece based on the hot pressing device; S13: inputting the initial composite workpiece into a pressing device, and forming a plurality of grooves on the initial composite workpiece by pressing the pressing device to obtain a semi-finished workpiece; S14: performing laser quenching at each groove position of the semi-finished workpiece by a laser heating device to obtain a composite metal sheet; The processing method also includes: After the laser quenching of the semi-finished workpiece is completed, the semi-finished workpiece is cooled, and the cooling time is adjusted according to the heating temperature of the semi-finished workpiece after the quenching, in combination with the heating temperature of the semi-finished workpiece after the laser quenching; Inputting the semi-finished workpiece after laser quenching into the cooling device, obtaining a second heating state diagram of the semi-finished workpiece after laser quenching based on the thermal imaging device, obtaining the heat distribution of the semi-finished workpiece after laser quenching based on the second heating state diagram, obtaining the heat data of each position of the semi-finished workpiece, and adjusting the cold air outlet volume of the cooling device according to the heat data of each position; Calculate the heat loss value of the semi-finished workpiece per unit time; ； in, is the heat of the semi-finished workpiece at the i-th position, is the average temperature of the semi-finished workpiece, is the heat loss value of the semi-finished workpiece at the i-th position per unit time, is the temperature drop rate of the semi-finished workpiece per unit time, is the specific heat capacity of the semi-finished workpiece at the average temperature, is the mass of the semi-finished workpiece entering the cooling device.

2. The composite metal sheet according to claim 1, characterized in that: The hardened portion is in a cone structure, and the wire diameter of the cone structure decreases from the connection position between the inner layer metal and the middle connecting metal toward the alloy layer.

3. The composite metal sheet according to claim 1, characterized in that: The outer metal layer is a stainless steel layer, and the middle connecting metal is aluminum metal; The inner metal layer is made of alloy.

4. The composite metal sheet according to claim 3, characterized in that: The alloy material of the inner layer metal contains one or more metal elements of Ti, Cu, and Mu.

5. The composite metal sheet according to claim 1, characterized in that: The groove diameter of the groove is d, and the value range of d is 0.1mm≤h≤0.5mm.

6. The composite metal sheet according to claim 1, characterized in that: The depth of the groove is h, and the value range of h is 0.5 μm≤h≤2.5 μm.

7. The composite metal sheet according to claim 1, characterized in that: The step of adjusting the heating temperature of each heating component in the hot pressing device according to the first heating state diagram and obtaining the initial composite workpiece based on the hot pressing device comprises: According to the materials of the plurality of metal sheets, an outer metal layer, a middle connecting metal layer and an inner metal layer are set, and a first heat detection threshold is set based on the metal melting temperature of the middle connecting metal layer; Acquire heating conditions of the plurality of metal sheets according to the first heating state diagram, and adjust the heating temperature of each heating component in combination with the first heat detection threshold; Based on the first heating state diagram and a first heat detection threshold, an initial composite workpiece whose heating amount reaches the first heat detection threshold is obtained.

8. The composite metal sheet according to claim 1, characterized in that: The method of performing laser quenching at each groove position of the semi-finished workpiece by a laser heating device to obtain a composite metal sheet comprises: Acquire the second and first heating state images of the semi-finished workpiece by a thermal imaging device, and acquire the plate thickness and the plate heat at the groove position of the semi-finished workpiece based on the second and first heating state images; The laser frequency and laser response time of the laser heating device are adjusted according to the thickness of the plate and the heat of the plate.

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