Metal pole plate forming device and metal pole plate forming method

Abstract

The invention provides a metal pole plate forming device and a metal pole plate forming method. The metal pole plate forming device comprises a preheater and a forming die, the preheater is used for heating a pole plate, the forming die can conduct stamping forming on the pole plate after die assembly, a heating part and a refrigerating part are arranged on the forming die, the heating part can be used for heating the pole plate in the forming die, and the refrigerating part can be used for refrigerating the pole plate in the forming die. And the refrigerating part can be used for cooling the polar plate in the forming die. Therefore, the metal pole plate forming device has the advantage that the forming precision and consistency of the pole plate can be conveniently improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen fuel cells, and in particular to a metal plate forming device and a metal plate forming method. Background Art

[0002] As one of the core components of hydrogen fuel cells, metal plates have the functions of separating reaction gases, collecting and conducting current, supporting membrane electrodes, and realizing rapid heat dissipation and drainage of the entire fuel cell system. At present, metal plates often use titanium and stainless steel as the substrate, and are mass-produced by cold stamping. Due to the large depth and width of the plate flow channel, the stamping process often causes cracks at the fillet of the plate flow channel. In addition, due to the complex local features of the plate, uneven deformation occurs during the stamping process, which leads to uneven distribution of stress in the plate, resulting in serious warping deformation and local wrinkling of the plate after stamping, which seriously reduces the forming accuracy and quality of the plate and affects the overall performance of the fuel cell stack. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the embodiments of the present invention provide a metal plate forming device and a metal plate forming method.

[0004] The metal plate forming device of the embodiment of the present invention includes a preheater and a forming mold, wherein the preheater is used to heat the pole plate, and the forming mold can be used to stamp the pole plate after the forming mold is closed. The forming mold is provided with a heating part and a cooling part, wherein the heating part can be used to heat the pole plate in the forming mold, and the cooling part can be used to cool the pole plate in the forming mold.

[0005] Therefore, the metal plate forming device according to the embodiment of the present invention has the advantage of facilitating improving the forming accuracy and consistency of the plate.

[0006] In some embodiments, the heating part is provided on at least one of the upper mold and the lower mold of the forming mold;

[0007] The cooling part is provided on at least one of the upper mold and the lower mold of the forming mold.

[0008] In some embodiments, a heating cavity and a refrigeration cavity are provided on the upper and lower templates of the forming mold, a heater is provided in the heating cavity, and the refrigeration cavity has a first inlet and a first outlet, the first inlet is used to introduce a cooling medium into the refrigeration cavity, and the first outlet is used for the cooling medium to flow out of the refrigeration cavity.

[0009] In some embodiments, the heating cavity and the refrigeration cavity are both cavities extending along the first direction, and a plurality of the heating cavities and a plurality of the refrigeration cavities are provided on the upper template and the lower template of the forming mold. The plurality of the heating cavities and the plurality of the refrigeration cavities are alternately arranged on the upper template of the forming mold in sequence along the second direction, and the plurality of the heating cavities and the plurality of the refrigeration cavities are alternately arranged on the lower template of the forming mold in sequence along the second direction, and any two of the upper and lower directions, the first direction, and the second direction are perpendicular to each other;

[0010] The preheater comprises a preheating chamber and a conveying part. The preheating chamber is provided with a preheating inlet on the side away from the forming mold in the second direction. The preheating chamber is provided with a preheating outlet on the side adjacent to the forming mold in the second direction. The conveying part is penetrated in the preheating chamber through the preheating inlet and the preheating outlet. The conveying part is used to convey the electrode plate. The preheating chamber is provided with a heating unit arranged around the conveying part.

[0011] In some embodiments, the heater is a resistive heating rod or an electromagnetic heating rod;

[0012] The cooling medium is cooling water or cooling gas;

[0013] The heating unit is a resistance heating unit or an electromagnetic induction heating unit;

[0014] The preheater is arranged on a mounting frame, and a heat insulation plate is arranged between the preheater and the mounting frame;

[0015] The conveying part includes a plurality of conveying shaft rollers;

[0016] There are multiple preheaters and multiple forming dies, each of which has a preheater that matches it, and multiple forming dies can perform stamping and forming for the pole plates in turn.

[0017] In some embodiments, the metal plate forming device includes a feeding device and a blanking die, wherein the feeding device can convey the strip into the blanking die, and the blanking die is used to cut the strip into the plate blank;

[0018] A manipulator for transferring the electrode plate is provided between the unloading device and the preheater, and a manipulator for transferring the electrode plate is provided between the preheater and the forming mold.

[0019] The present invention also proposes a metal plate forming method using the above-mentioned metal plate forming device, comprising the following steps:

[0020] S1, sending the electrode blank into a preheater to be heated to a first preset temperature;

[0021] S2, transferring the electrode blank heated to the first preset temperature into a forming mold, the forming mold is closed so as to stamp the electrode blank into a formed electrode plate, and within a second preset time after the forming mold is closed, the heating part in the forming mold heats the formed electrode plate;

[0022] S3. After the second preset time after the forming mold is closed, the heating part in the forming mold stops heating the formed electrode plate, and the cooling part of the forming mold cools the formed electrode plate for the third preset time before opening the mold to remove the formed electrode plate.

[0023] In some embodiments, in step S1, the first preset temperature is greater than or equal to the recrystallization temperature of the electrode blank;

[0024] In step S2, the second preset time is greater than or equal to 0.5 seconds and less than or equal to 1 second;

[0025] In the step S3, the third preset time is greater than or equal to 1 second and less than or equal to 3 seconds.

[0026] In some embodiments, in step S1, a feeding device is used to convey the strip material to a blanking die, and after the blanking die is closed to cut out the plate blank, a robot is used to transfer the plate blank to the preheater for heating;

[0027] In the step S2, after the heating unit in the forming mold is turned on to heat the template of the forming mold, the electrode blank heated to the first preset temperature is transferred to the forming mold, and the heating unit in the forming mold heats the temperature of the formed electrode plate to above 200° C.;

[0028] In the step S3, after the formed electrode plate in the forming mold is taken out, the heating part in the forming mold is turned on.

[0029] In some embodiments, the preheater and the forming die are multiple;

[0030] After the steps S2 and S3 are sequentially implemented in one of the forming molds, the formed pole plate is sent to the preheater to be heated to the first preset temperature, and then the formed pole plate heated to the first preset temperature is transferred to the next forming mold and the steps S2 and S3 are sequentially implemented until the stamping of the formed pole plate is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of a metal plate forming device according to an embodiment of the present invention.

[0032] Figure 2is a schematic diagram of a metal plate forming device according to another embodiment of the present invention.

[0033] Figure 3 Schematic diagram of a feeding device and a blanking mold according to an embodiment of the present invention.

[0034] Figure 4 is a schematic diagram of a preheater according to an embodiment of the present invention.

[0035] Figure 5 is a schematic diagram of a forming mold according to an embodiment of the present invention.

[0036] Reference numerals:

[0037] 1. preheater, 11. preheating chamber, 12. conveying part, 13. conveying shaft roller, 14. heat insulation board, 15. mounting frame, 16. heating unit;

[0038] 2. forming mold, 21. upper mold plate, 22. lower mold plate, 23. heating chamber, 24. cooling chamber;

[0039] 3. Feeding device;

[0040] 4. Blanking mold;

[0041] 5. Robotic arm. DETAILED DESCRIPTION

[0042] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0043] The metal plate forming device according to the embodiment of the present invention is described below with reference to the accompanying drawings. Figures 1 to 5 As shown, the metal plate forming device according to an embodiment of the present invention includes a feeding device 3, a blanking mold 4, a preheater 1 and a forming mold 2.

[0044] The feeding device 3 can convey the strip to the blanking die 4. Specifically, the plate substrate can be one of stainless steel, titanium and titanium alloy, aluminum and aluminum alloy thin strip. The feeding device 3 includes a feeding mechanism and a flattening mechanism. After the whole roll of metal substrate is unrolled, it enters the blanking die 4 through the feeding mechanism and the flattening mechanism. The feeding mechanism can independently set the feeding length and step speed, and communicate with the working signal of the punch of the forming die 2. The flattening mechanism can flatten the unrolled titanium material.

[0045] The blanking die 4 is used to cut the strip into the plate blanks. Specifically, the blanking die 4 is provided with a limit mechanism to ensure that the flattened titanium material can smoothly enter the blanking die 4 and ensure the size of the blank. The blanking die 4 consists of an upper die and a lower die. The upper die is embedded with a blanking die, and the lower die is provided with a knife edge that matches the blanking die at a corresponding position. One die closing process completes the blanking of the plate blank.

[0046] The preheater 1 is used to heat the electrode plate (e.g., electrode plate blank, formed electrode plate, etc.).

[0047] After the forming mold 2 is closed, the plate can be stamped and formed. The forming mold 2 is provided with a heating part and a cooling part. The forming mold 2 is composed of an upper mold and a lower mold. A convex flow channel structure is processed in the lower mold of the forming mold 2, and a concave flow channel structure is processed in the upper mold of the forming mold 2. When the forming mold 2 is closed, the convex flow channel structure and the concave flow channel structure can be matched with each other. The heating part can be used to heat the (formed) plate in the forming mold 2, and the cooling part can be used to cool the (formed) plate in the forming mold 2. Specifically, when the forming mold 2 is closed, the plate can be stamped and formed to form a formed plate, the heating part is used to (directly or indirectly) heat the formed plate, and the cooling part is used to (directly or indirectly) cool the formed plate. The heating part and the cooling part cooperate (the cooling part is closed when the heating part is turned on, and the heating part is closed when the cooling part is turned on) to adjust the stage temperature of the plate after forming.

[0048] According to the metal plate forming device of the embodiment of the present invention, by providing a preheater 1, the preheater 1 can heat the plate (plate blank, formed plate, etc.) before entering the forming mold 2, so that the plate is heated to above the recrystallization temperature, so as to complete the preheating of the plate. After the preheated plate is transferred to the forming mold 2, the forming mold 2 can be closed to stamp the plate to form a formed plate, and the heating part is used to heat the formed plate during the forming process. After a period of time, the heating part stops heating the formed plate, and the refrigeration part starts to cool the formed plate. After the formed plate is cooled to room temperature, the forming mold 2 opens to take out the formed plate.

[0049] In the above process, the metal plate blank is first heated to above the recrystallization temperature in the preheater 1, and then the plate is transferred to the forming mold 2. The forming mold 2 adopts a heating and cooling cycle design, that is, the mold surface is heated before the heated blank is transferred to the forming mold 2, to ensure that the metal plate blank can maintain a high temperature during the stamping process. After the forming is completed, the refrigeration unit cools the forming mold 2 to quickly cool the formed plate, so that the formed plate is cooled under the constraints of the upper and lower mold cavities. It can not only ensure that the plate is stamped at a higher temperature to reduce the resistance of the plate forming and reduce the stress inside the plate after forming, but also effectively control the warping deformation caused by the uneven internal stress distribution after the plate is formed, improve the forming accuracy and consistency of the plate, and meet the high efficiency, high precision, low cost and batch production requirements of metal bipolar plates.

[0050] A manipulator 5 for transferring the plate is provided between the blanking die 4 and the preheater 1, and a manipulator 5 for transferring the plate is provided between the preheater 1 and the forming die 2. The manipulator 5 can improve the moving efficiency of the plate.

[0051] Therefore, the metal plate forming device according to the embodiment of the present invention has the advantage of facilitating improving the forming accuracy and consistency of the plate.

[0052] like Figure 5 As shown, in some embodiments, a heating unit is provided on at least one of the upper mold and the lower mold of the forming mold 2. A cooling unit is provided on at least one of the upper mold and the lower mold of the forming mold 2. In other words, the heating unit and the cooling unit can be provided on both the upper mold and the lower mold of the forming mold 2.

[0053] like Figure 5As shown, in some embodiments, the upper template 21 and the lower template 22 of the forming mold 2 are both provided with a heating cavity 23 and a refrigeration cavity 24. Specifically, the heating cavity 23 and the refrigeration cavity 24 are cavities extending along the first direction (and penetrating the upper template 21 and the lower template 22), and multiple heating cavities 23 and multiple refrigeration cavities 24 are both provided on the upper template 21 and the lower template 22 of the forming mold 2. Multiple heating cavities 23 and multiple refrigeration cavities 24 are alternately arranged on the upper template 21 of the forming mold 2 in sequence along the second direction, and multiple heating cavities 23 and multiple refrigeration cavities 24 are alternately arranged on the lower template 22 of the forming mold 2 in sequence along the second direction, and any two of the up-down direction, the first direction and the second direction are perpendicular. Thus, the heating cavity 23 and the refrigeration cavity 24 can be alternately arranged on the upper template 21 and the lower template 22 of the forming mold 2 in sequence along the horizontal direction, so that heating and cooling can be made more uniform. The plate is indirectly heated and cooled by heating and cooling the upper template 21 and the lower template 22. For example, the first direction is the front-to-back direction, the second direction is the left-to-right direction, the heating cavity 23 and the cooling cavity 24 are both circular cavities extending along the front-to-back direction, and multiple heating cavities 23 and multiple cooling cavities 24 are alternately arranged on the upper template 21 of the forming mold 2 along the left-to-right direction, and multiple heating cavities 23 and multiple cooling cavities 24 are alternately arranged on the lower template 22 of the forming mold 2 along the left-to-right direction.

[0054] A heater is provided in the heating chamber 23, and the heater is a resistance heating rod or an electromagnetic heating rod. When the heater is turned on, the upper mold plate 21 and the lower mold plate 22 can be heated, thereby heating the electrode plate.

[0055] The refrigeration chamber 24 has a first inlet and a first outlet. The first inlet is used to introduce a cooling medium into the refrigeration chamber 24, and the first outlet is used for the cooling medium to flow out of the refrigeration chamber 24, that is, the first outlet can discharge the cooling medium after heat exchange in the refrigeration chamber 24. The cooling medium is cooling water or cooling gas.

[0056] like Figure 4 As shown, the preheater 1 has a preheating chamber 11 and a conveying part 12. The preheating chamber 11 is provided with a preheating inlet on the side away from the forming mold 2 in the second direction, and the preheating chamber 11 is provided with a preheating outlet on the side adjacent to the forming mold 2 in the second direction. The conveying part 12 is arranged in the preheating chamber 11 through the preheating inlet and the preheating outlet. The conveying part 12 is used to convey the electrode plate. The preheating chamber 11 has a heating unit 16 arranged around the conveying part 12. Specifically, the preheating chamber 11 is provided with heating units 16 on both sides of the up and down directions and the first direction. The heating units 16 are resistance heating units or electromagnetic induction heating units. The preheater 1 is arranged on a mounting frame 15, and a heat insulation board 14 is arranged between the preheater 1 and the mounting frame 15. For example, a preheating inlet is arranged on the left side of the preheating chamber 11, and a preheating outlet is arranged on the right side of the preheating chamber 11.

[0057] The conveying part 12 includes a plurality of conveying shaft rollers 13 . The conveying shaft rollers 13 can convey the electrode plate to the preheating chamber 11 and then convey it out. That is, the electrode plate can be conveyed by the conveying shaft rollers 13 .

[0058] There are multiple preheaters 1 and forming dies 2, and each forming die 2 has a preheater 1 that matches it. Multiple forming dies 2 can stamp and form the plate in sequence. Specifically, some plates need to be stamped and formed multiple times (twice). There are multiple preheaters 1 and forming dies 2, so that before each stamping and forming, the plate can be sent to the corresponding preheater 1 for heating. Figure 2 As shown, there are two preheaters 1 and two forming molds 2, and a feeding device 3, a blanking mold 4, a preheater 1, a forming mold 2, a preheater 1 and a forming mold 2 are arranged in sequence in the process direction of the plate.

[0059] like Figures 1 to 5 As shown, the present invention also proposes a metal plate forming method according to a metal plate forming device of an embodiment of the present invention. The metal plate forming method according to an embodiment of the present invention comprises the following steps:

[0060] S1, feeding the electrode blank into the preheater 1 to be heated to a first preset temperature. Specifically, in step S1, the first preset temperature is greater than or equal to the recrystallization temperature of the electrode blank (the recrystallization temperature is the lowest temperature at which the internal structure of the metal undergoes recrystallization by heating).

[0061] like Figure 1 and Figure 2 As shown, in some embodiments, in step S1, the strip is conveyed to the blanking die 4 by the feeding device 3. After the blanking die 4 closes the mold and cuts out the plate blank, the plate blank is transferred to the preheater 1 for heating by the manipulator 5. The manipulator 5 grabs the flat sheet of the blank and transfers it to the conveying shaft roller 13 of the preheater 1 (heat treatment furnace). The conveying shaft roller 13 rotates under the drive of the power, so that the blank enters the preheating chamber 11. The blank is heated to above the recrystallization temperature by the preheater 1, and the holding time of the plate blank in the preheater 1 is controlled by adjusting the speed of the conveying shaft roller 13 so as to reach the required heat treatment temperature. Since the surface area of ​​the plate blank is large and the thickness direction dimension is small, the required heat treatment temperature can be reached in a shorter time. As the conveying shaft roller 13 rotates, the heat-treated blank is transferred out of the preheating chamber 11 to obtain the heat-treated plate blank.

[0062] S2, transferring the electrode blank heated to the first preset temperature into the forming mold 2, the forming mold 2 is closed so as to stamp the electrode blank into a formed electrode plate, and the heating part in the forming mold 2 heats the formed electrode plate within a second preset time after the forming mold 2 is closed. Specifically, the second preset time is greater than or equal to 0.5 seconds and less than or equal to 1 second, that is, within 0.5 seconds to 1 second after the forming mold 2 is closed, the heating part in the forming mold 2 heats the formed electrode plate.

[0063] In some embodiments, in step S2, after the heating unit in the forming mold 2 is turned on to heat the template of the forming mold 2, the plate blank heated to the first preset temperature is transferred to the forming mold 2, and the heating unit in the forming mold 2 heats the temperature of the formed plate to above 200°C. Specifically, before the manipulator 5 transfers the heat-treated plate blank to the lower mold of the forming mold 2, the heating unit works and heats the upper and lower mold surfaces of the forming mold 2 to ensure the forming temperature of the plate blank, avoid the heat loss of the blank due to the low surface temperature of the upper and lower molds of the forming mold, so as to reduce the resistance and internal stress of the forming. After the manipulator quickly transfers the heat-treated plate blank to the surface of the lower mold of the forming mold, the upper mold of the forming mold 2 moves toward the lower mold of the forming mold 2 under the drive of the forming punch, and the mold is closed. After the pressure is maintained for 0.5 seconds to 1.0 seconds, the heating unit stops working.

[0064] S3, after the second preset time after the forming mold 2 is closed, the heating part in the forming mold 2 stops heating the formed electrode plate, and the refrigeration part of the forming mold 2 cools the formed electrode plate for the third preset time before opening the mold to remove the formed electrode plate. In step S3, the third preset time is greater than or equal to 1 second and less than or equal to 3 seconds, that is, the refrigeration part of the forming mold 2 cools the formed electrode plate for greater than or equal to 1 second and less than or equal to 3 seconds before opening the mold, so that the temperature of the formed electrode plate taken out is room temperature, that is, the temperature of the forming mold after cooling by the refrigeration part is room temperature.

[0065] In some embodiments, in step S3, after the formed plate in the forming mold 2 is taken out, the heating part in the forming mold 2 is turned on to heat the subsequent plate forming process. Specifically, the cooling medium enters the forming mold 2 through the refrigeration chamber 24 for 1 to 3 seconds to cool the surface of the forming mold 2 and the hot stamping formed plate, that is, under the constraints of the upper and lower molds of the forming mold 2, the hot stamping formed plate is cooled to room temperature, avoiding the distortion caused by the cooling of the formed plate in the free state. Driven by the forming punch, the forming mold 2 is opened, and when the upper mold of the forming mold 2 reaches the upper dead point, the manipulator 5 transfers the sample to obtain the hot stamping formed plate. At the same time, the heating part starts to work to heat the surface of the template (upper template 21 and lower template 22) of the forming mold 2, waiting for the next sample to be hot stamped.

[0066] In some embodiments, the heating process of the heating part and the cooling process of the refrigeration part, the controllers of the heating part and the refrigeration part are connected to the controller of the punching machine, so that the working status of the punching machine is used as a signal and the solenoid valve is used for automatic control to better match the automated production and improve production efficiency.

[0067] like Figure 2 As shown, in some embodiments, there are multiple preheaters 1 and forming molds 2. After the steps S2 and S3 are sequentially implemented in one forming mold 2, the formed plate is sent to the preheater 1 to be heated to the first preset temperature, and then the formed plate heated to the first preset temperature is transferred to the next forming mold 2 and the steps S2 and S3 are sequentially implemented until the stamping of the formed plate is completed. In other words, the plate is formed multiple times, and after each forming step S2 and S3, it is sent to the preheater 1 again for heating, and then enters the next forming mold 2 again to implement the steps S2 and S3 until the stamping of the formed plate is completed.

[0068] According to the metal pole plate forming method of the embodiment of the present invention, the metal pole plate blank is first heated to above the recrystallization temperature, and then the pole plate is transferred to the forming mold 2 to ensure that the metal pole plate blank can maintain a high temperature during the stamping process. After the forming is completed, the refrigeration unit cools the forming mold 2 to quickly cool the formed pole plate, so that the formed pole plate is cooled under the constraints of the upper and lower model cavities of the forming mold 2. The transportation cycle of the heat-treated blank is greatly shortened, the heat loss is reduced, and the production efficiency is improved. On the other hand, by designing the forming mold 2 for cyclic heating and cooling, the heat loss during the transfer of the blank is effectively compensated, the temperature of the hot stamping is guaranteed, and the resistance of the pole plate forming is reduced. After hot forming, the rapid cooling under the constraints of the upper and lower molds of the forming mold 2 effectively prevents the pole plate from warping and deformation caused by stress release, and improves the forming accuracy.

[0069] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0070] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0071] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0073] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0074] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A metal plate forming device, characterized in that: It includes a preheater and a forming mold, wherein the preheater is used to heat the pole plate, and the forming mold can be used to stamp the pole plate after the mold is closed. The forming mold is provided with a heating part and a cooling part, wherein the heating part can be used to heat the pole plate in the forming mold, and the cooling part can be used to cool the pole plate in the forming mold.

2. The metal plate forming device according to claim 1, characterized in that: The heating part is provided on at least one of the upper die and the lower die of the forming die; The cooling part is provided on at least one of the upper mold and the lower mold of the forming mold.

3. The metal plate forming device according to claim 2, characterized in that: The upper and lower mold plates of the forming mold are both provided with a heating cavity and a cooling cavity. A heater is provided in the heating cavity. The cooling cavity has a first inlet and a first outlet. The first inlet is used to introduce a cooling medium into the cooling cavity, and the first outlet is used for the cooling medium to flow out of the cooling cavity.

4. The metal plate forming device according to claim 3, characterized in that: The heating cavity and the refrigeration cavity are cavities extending along the first direction, and a plurality of the heating cavities and a plurality of the refrigeration cavities are provided on the upper template and the lower template of the forming mold. The plurality of the heating cavities and the plurality of the refrigeration cavities are alternately arranged on the upper template of the forming mold in sequence along the second direction, and the plurality of the heating cavities and the plurality of the refrigeration cavities are alternately arranged on the lower template of the forming mold in sequence along the second direction, and any two of the upper and lower directions, the first direction, and the second direction are perpendicular to each other; The preheater comprises a preheating chamber and a conveying part. The preheating chamber is provided with a preheating inlet on the side away from the forming mold in the second direction. The preheating chamber is provided with a preheating outlet on the side adjacent to the forming mold in the second direction. The conveying part is penetrated in the preheating chamber through the preheating inlet and the preheating outlet. The conveying part is used to convey the electrode plate. The preheating chamber is provided with a heating unit arranged around the conveying part.

5. The metal plate forming device according to claim 4, characterized in that: The heater is a resistance heating rod or an electromagnetic heating rod; The cooling medium is cooling water or cooling gas; The heating unit is a resistance heating unit or an electromagnetic induction heating unit; The preheater is arranged on a mounting frame, and a heat insulation plate is arranged between the preheater and the mounting frame; The conveying part includes a plurality of conveying shaft rollers; There are multiple preheaters and multiple forming dies, each of which has a preheater that matches it, and multiple forming dies can perform stamping and forming for the pole plates in turn.

6. The metal plate forming device according to any one of claims 1 to 5, characterized in that: The metal plate forming device comprises a feeding device and a blanking die, wherein the feeding device can convey the strip material to the blanking die, and the blanking die is used to cut the strip material into the plate blank material; A manipulator for transferring the electrode plate is provided between the unloading device and the preheater, and a manipulator for transferring the electrode plate is provided between the preheater and the forming mold.

7. A method for forming a metal plate using the metal plate forming device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, sending the electrode blank into a preheater to be heated to a first preset temperature; S2, transferring the electrode blank heated to the first preset temperature into a forming mold, the forming mold is closed so as to stamp the electrode blank into a formed electrode plate, and within a second preset time after the forming mold is closed, the heating part in the forming mold heats the formed electrode plate; S3. After the second preset time after the forming mold is closed, the heating part in the forming mold stops heating the formed electrode plate, and the cooling part of the forming mold cools the formed electrode plate for the third preset time before opening the mold to remove the formed electrode plate.

8. The metal plate forming method according to claim 7, characterized in that: In the step S1, the first preset temperature is greater than or equal to the recrystallization temperature of the electrode blank; In step S2, the second preset time is greater than or equal to 0.5 seconds and less than or equal to 1 second; In the step S3, the third preset time is greater than or equal to 1 second and less than or equal to 3 seconds.

9. The metal plate forming method according to claim 7, characterized in that: In the step S1, the strip is conveyed to the blanking die by a feeding device, and after the blanking die is closed to cut out the plate blank, the plate blank is transferred to the preheater by a robot for heating; In the step S2, after the heating unit in the forming mold is turned on to heat the template of the forming mold, the electrode blank heated to the first preset temperature is transferred to the forming mold, and the heating unit in the forming mold heats the temperature of the formed electrode plate to above 200° C.; In the step S3, after the formed electrode plate in the forming mold is taken out, the heating part in the forming mold is turned on.

10. The metal plate forming method according to claim 7, characterized in that: There are multiple preheaters and multiple forming dies; After the steps S2 and S3 are sequentially implemented in one of the forming molds, the formed pole plate is sent to the preheater to be heated to the first preset temperature, and then the formed pole plate heated to the first preset temperature is transferred to the next forming mold and the steps S2 and S3 are sequentially implemented until the stamping of the formed pole plate is completed.

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