Stamping die for electrolytic cell polar plate

Abstract

The invention relates to the technical field of equipment manufacturing industry, in particular to a stamping die for an electrolytic cell polar plate, which comprises an upper die and a lower die, the upper die comprises a die body, a plurality of convex dies and a plurality of concave dies, the convex dies and the concave dies are arranged on the die body in a staggered manner, the convex dies can move up and down relative to the die body, and the concave dies can move along with the die body. An oil supply assembly and an oil pumping assembly are arranged on the die body. According to the stamping die for the electrolytic cell polar plate, the upper die and the lower die are arranged, and in the stamping forming process, lubricating liquid can permeate and lubricate the parts, with large abrasion, of the female die and the male die as far as possible under certain pressure, so that the abrasion speed of the male die and the female die is reduced, the abrasion uniformity is improved, and the service life of the male die and the female die is prolonged. The abrasion speed of each area of the male die and the female die tends to be consistent, the situation that the tops of mastoids are not coplanar is reduced, and the stability of follow-up electrolysis work is improved.

Description

Technical Field

[0001] This invention relates to the field of equipment manufacturing technology, specifically to a stamping die for an electrolytic cell electrode plate. Background Technology

[0002] Electrolytic cell plates are the core components of electrolysis equipment. These plates with "papillary" structures are widely used in electrolysis production fields such as chemical and metallurgical industries because they can improve electrolysis reaction efficiency and optimize current distribution.

[0003] Electrolytic cell plates are formed by stamping using molds. During the stamping process, the molds must withstand enormous impact loads and friction, and the damage patterns differ significantly between different parts: the upper mold (punch) directly acts on the plate material and extrudes it into a protrusion; its damage mainly stems from direct impact and sliding friction between the end face and the material, with common failure modes including end face wear and cracking. The lower mold (concave) carries the material and guides its flow into the cavity to complete the forming process; damage is concentrated at the inlet fillet and cavity surface where the material flow is guided, primarily manifesting as wear and tear. Continuous mold damage not only shortens the service life and increases mold replacement and maintenance costs but also directly affects the forming quality of the plate.

[0004] To alleviate mold wear and ensure forming quality, existing stamping processes commonly employ sprayed lubricant, hoping to form a protective film between the mold and the material, thereby reducing the coefficient of friction and wear. However, during the stamping stroke, the contact area between the mold and the material experiences significant pressure, especially at stress concentration points (such as the edge of the upper mold end face and the fillet of the lower mold entrance). This high pressure causes the lubricant to be almost completely squeezed out, failing to form an effective protective film and leading to lubrication failure. This failure directly results in uneven mold wear and uneven material flow, ultimately causing the tops of the formed electrode protrusions to lose their coplanarity. This non-coplanarity leads to uneven stress distribution and disordered current distribution after electrode assembly, significantly reducing electrolysis efficiency and even causing localized overheating and accelerated electrode corrosion, severely impacting the stable operation of the electrolysis equipment. Summary of the Invention

[0005] This invention provides a stamping die for an electrolytic cell electrode plate, which solves the problem that when existing stamping dies are used to stamp electrolytic cell electrode plates, the lubricant is difficult to lubricate the stress concentration areas of the die, thus leading to die wear.

[0006] The present invention provides a stamping die for an electrolytic cell electrode plate, which adopts the following technical solution: A stamping die for an electrolytic cell electrode plate, used for stamping the electrode plate, includes an upper die and a lower die, which are arranged sequentially in the vertical direction. The upper die is located above the lower die and can move up and down. The electrode plate is placed on the lower die. The upper die includes a die body, multiple punches, and multiple dies, which are staggered on the die body. In the initial state, the punches, dies, and the end of the die body facing the electrode plate are on the same horizontal plane. The punches can move up and down relative to the die body, and the dies can move with the die body. The upper die and the lower die are arranged opposite each other in the vertical direction, and the structure and connection method of the lower die are the same as those of the upper die. The punches / dies on the upper die and the dies on the lower die... The molds / punches are set up in a one-to-one correspondence. The punches / dies on the upper mold can close with the dies / punches on the corresponding lower mold to stamp the electrode plate. The mold body of the upper mold can move up and down to abut or disengage from the mold body of the lower mold. When the mold body of the upper mold abuts with the mold body of the lower mold, a first chamber is defined between the mold body, the punch, and the electrode plate, and a second chamber is defined between the mold body, the die, and the electrode plate. The mold body is equipped with an oil supply component and an oil extraction component. The oil supply component is used to supply lubricating fluid to the first and second chambers after the mold body of the upper mold abuts with the mold body of the lower mold. The oil extraction component is used to extract the lubricating fluid from the first and second chambers during the stamping process, and the rate of decrease in the volume of the lubricating fluid is less than the rate of decrease in the volume of the first and second chambers.

[0007] Furthermore, the oil supply assembly includes an oil supply pipe disposed on the mold body. The oil supply pipe includes a first main pipe and multiple first branch pipes. The first main pipe has a first oil port, and a first oil tank filled with lubricating fluid is connected to the first oil port via an oil supply pump. The oil supply pump is used to deliver the lubricating fluid in the first oil tank from the first oil port to the first main pipe. The multiple first branch pipes are all connected to the first main pipe. The oil extraction assembly includes an oil extraction pipe disposed on the mold body. The oil extraction pipe includes a second main pipe and multiple second branch pipes. The second main pipe has a second oil port, and a second oil tank is connected to the second oil port via an oil extraction pump. The pump is used to draw the lubricating oil in the second main pipe back to the second oil tank through the second oil port; multiple second branch pipes are connected to the second main pipe, and the first branch pipe and the second branch pipe are arranged alternately on the mold body. Multiple first branch pipes are provided at the lower end of the first branch pipe. Each first branch pipe is adjacent to the first chamber and / or the second chamber, and each first branch pipe is connected to the first chamber and / or the second chamber arranged adjacent to it. Multiple second branch pipes are provided at the lower end of the second branch pipe. Each second branch pipe is adjacent to the first chamber and / or the second chamber, and each second branch pipe is connected to the first chamber and / or the second chamber arranged adjacent to it.

[0008] Furthermore, the mold body includes a main base, a connecting base, and a mounting base. The main base, connecting base, and mounting base are arranged sequentially and fixedly connected in the vertical direction. In the upper mold, the main base is located at the upper end of the connecting base; in the lower mold, the main base is located at the lower end of the connecting base.

[0009] Furthermore, each punch is provided with a first oil inlet channel and a first oil outlet channel, and each die is provided with a second oil inlet channel and a second oil outlet channel; the mounting base is provided with multiple first temporary storage cavities and multiple second temporary storage cavities, each first temporary storage cavity is correspondingly arranged with a first branch pipe, and the first temporary storage cavity is connected to the first branch pipe corresponding to it, each first temporary storage cavity is adjacent to the first oil inlet channel on the punch or the second oil inlet channel on the die, and each first temporary storage cavity is connected to the first oil inlet channel on the punch or the second oil inlet channel on the die adjacent to it; each second temporary storage cavity is correspondingly arranged with a second branch pipe, and the second temporary storage cavity is connected to the second branch pipe corresponding to it, each second temporary storage cavity is adjacent to the first oil outlet channel on the punch or the second oil outlet channel on the die, and each second temporary storage cavity is connected to the first oil outlet channel on the punch or the second oil outlet channel on the die adjacent to it.

[0010] Furthermore, the punch includes a straight section and a forming section, which are arranged sequentially and fixedly connected in the vertical direction. The straight section and the forming section are integrally formed structures. The ends of the first oil inlet and the first oil outlet that are connected to the first cavity are respectively referred to as the first end and the second end. Both the first end and the second end are located at the junction of the straight section and the forming section. The ends of the second oil inlet and the second oil outlet that are connected to the second cavity are both located at the bottom of the upper cavity of the die.

[0011] Furthermore, a driving cavity is provided on the mold body, and a driving component is provided inside the driving cavity. The driving component is used to drive multiple punches to move up and down.

[0012] Furthermore, the driving component includes a driving plate and multiple driving rods. The driving plate is slidably sealed with the driving cavity and divides the driving cavity into an active chamber and a driven chamber arranged sequentially in the vertical direction. The active chamber is located on the side of the driven chamber that is away from the electrode plate in the vertical direction. The active chamber is connected to an external third oil tank through an oil pump body. The oil pump body is used to send the oil in the third oil tank to the active chamber or to recover the oil in the active chamber to the third oil tank. Multiple driving rods are all arranged on the driving plate and located in the driven chamber. Each driving rod is arranged in a one-to-one correspondence with a punch, and the driving rod is connected to the punch corresponding to it.

[0013] Furthermore, the mold body is provided with multiple air channels, which are arranged vertically and face one side of the electrode plate. All the air channels are connected to an external air pump.

[0014] Furthermore, both the die and the punch are detachably connected to the corresponding mold body.

[0015] Furthermore, the pressure of the lubricating fluid in the first and second chambers is positively correlated with the stamping pressure.

[0016] The beneficial effects of this invention are as follows: The stamping die for an electrolytic cell electrode plate of this invention, by setting an upper die and a lower die, allows the upper die body to abut against the lower die body before stamping, thereby pressing the non-forming area on the electrode plate. During stamping, the punch can slide up and down relative to its corresponding die body, allowing the punch to move independently to stamp the electrode plate, avoiding excessive tensile stress on the non-forming area and reducing its support strength. Furthermore, before stamping, an oil supply assembly supplies oil to the first and second chambers. In the first chamber, lubricant fills the end face of the punch, and in the second chamber, lubricant fills the cavity of the die, achieving sufficient lubrication of both the punch end face and the die cavity. Furthermore, during the stamping process, the oil in the first and second chambers is extracted using an oil extraction assembly, ensuring that the rate of decrease in lubricant volume is less than the rate of decrease in the volume of the first and second chambers. This results in the lubricant in the first and second chambers having a certain pressure. During the stamping process, the pressure of the lubricant applies pressure to the electrode plates, improving pressure uniformity, preventing pressure concentration, and allowing the lubricant to penetrate as much as possible into the areas of the die and dies with high wear while maintaining a certain pressure. This lubricates these areas, reducing the wear rate of the die and dies, improving wear uniformity, and making the wear rate of each area of ​​the die and dies more consistent. This avoids distortion of the die and dies shape due to excessive local wear, reduces the occurrence of non-coplanarity of the nipple tops, and improves the stability of subsequent electrolysis operations. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a stamping die for an electrolytic cell electrode plate according to the present invention; Figure 2 This is a top view of the overall structure of an embodiment of a stamping die for an electrolytic cell electrode plate according to the present invention; Figure 3 for Figure 2 A cross-sectional view along the AA direction; Figure 4 for Figure 3 Enlarged view of point C in the middle; Figure 5 for Figure 2A cross-sectional view along the BB direction; Figure 6 for Figure 5 Enlarged view of point D in the middle; Figure 7 This is a diagram showing the state of the punch and die after they are closed, according to an embodiment of the stamping die for an electrolytic cell electrode plate of the present invention. Figure 8 This is a partially exploded view of an embodiment of a stamping die for an electrolytic cell electrode plate according to the present invention. Figure 9 This is a schematic diagram of the oil supply pipe and the oil extraction pipe of an embodiment of a stamping die for an electrolytic cell electrode plate according to the present invention; Figure 10 This is a schematic diagram of the punch of an embodiment of a stamping die for an electrolytic cell electrode plate according to the present invention; Figure 11 This is a schematic diagram of the die cavity of an embodiment of a stamping die for an electrolytic cell electrode plate according to the present invention.

[0019] In the diagram: 100, electrode plate; 200, upper mold; 210, mold body; 211, main seat; 212, connecting seat; 213, mounting seat; 215, first temporary storage cavity; 216, second temporary storage cavity; 217, drive cavity; 218, drive plate; 219, drive rod; 220, punch; 221, first oil inlet channel; 222, first oil outlet channel; 230, die; 231, second oil inlet channel; 232, second oil outlet channel; 240, First chamber; 250, Second chamber; 260, Air passage; 300, Lower mold; 400, Oil supply assembly; 410, Oil supply pipe; 411, First main pipe; 412, First branch pipe; 413, First oil port; 414, First branch pipe; 500, Oil extraction assembly; 510, Oil extraction pipe; 511, Second main pipe; 512, Second branch pipe; 513, Second oil port; 514, Second branch pipe; 600, Hydraulic cylinder. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] An embodiment of a stamping die for an electrolytic cell electrode plate according to the present invention, such as... Figures 1 to 11 As shown.

[0022] A stamping die for an electrolytic cell electrode plate is provided for stamping an electrode plate 100, which is the electrode plate of the electrolytic cell. The die includes an upper die 200 and a lower die 300, which are arranged vertically in sequence. The upper die 200 is located above the lower die 300 and can move up and down. The electrode plate 100 is placed on the lower die 300. The upper die 200 is driven to move up and down by a driving component.

[0023] The upper mold 200 includes a mold body 210, multiple punches 220, and multiple dies 230, which are staggered on the mold body 210. In the initial state, the punches 220, dies 230, and the end of the mold body 210 facing the electrode plate 100 are on the same horizontal plane. The punches 220 can move synchronously with the mold body 210 and can move up and down relative to the mold body 210, while the dies 230 can move with the mold body 210. The upper mold 200 and the lower mold 300 are arranged opposite each other in the vertical direction, and the structure and connection method of the lower mold 300 are the same as those of the upper mold 200. The punch 220 / die 230 on the upper mold 200 and the die 230 / punch 220 on the lower mold 300 are arranged in a one-to-one correspondence. The punch 220 / die 230 on the upper mold 200 can close with the die 230 / punch 220 on the lower mold 300 and stamp the electrode plate 100. The upper mold 200 mold body 210 can move up and down to abut or disengage from the lower mold 300 mold body 210. When the upper mold 200 mold body 210 abuts with the lower mold 300 mold body 210, a first chamber 240 is defined between the mold body 210, the punch 220 and the electrode plate 100, and a second chamber 250 is defined between the mold body 210, the die 230 and the electrode plate 100. The mold body 210 is provided with an oil supply component 400 and an oil extraction component 500. The oil supply component 400 is used to supply lubricating fluid to the first chamber 240 and the second chamber 250 after the mold body 210 of the upper mold 200 abuts against the mold body 210 of the lower mold 300. The oil extraction component 500 is used to extract the lubricating fluid in the first chamber 240 and the second chamber 250 during the stamping process, and the rate of decrease in the volume of the lubricating fluid is less than the rate of decrease in the volume of the first chamber 240 and the second chamber 250.

[0024] During stamping, the electrode plate 100 is first placed on the lower die 300, and then the upper die 200 is driven downwards as a whole, so that the die body 210 of the upper die 200 abuts against the die body 210 of the lower die 300, pressing the non-forming area of ​​the electrode plate 100 to achieve fixed positioning of the electrode plate 100 and avoid excessive tensile stress on the non-forming area during subsequent stamping. After the die body 210 is closed, a first chamber 240 is defined between the die body 210, the punch 220 and the electrode plate 100, and a second chamber 250 is defined between the die body 210, the die 230 and the electrode plate 100. Then, the oil supply assembly 400 on the mold body 210 is activated to supply oil to the first chamber 240 and the second chamber 250. In the first chamber 240, the lubricant fills the end face of the punch 220, and in the second chamber 250, the lubricant fills the cavity of the die 230, thus achieving sufficient lubrication of the end face of the punch 220 and the cavity of the die 230.

[0025] Then, the multiple punches 220 on the upper mold 200 are driven to move downwards, and the multiple punches 220 on the lower mold 300 are driven to move upwards. The multiple punches 220 on the upper mold 200 move downwards and close with the multiple dies 230 on the lower mold 300, which are set accordingly, and stamp the electrode plate 100. The multiple punches 220 on the lower mold 300 move upwards and close with the multiple dies 230 on the upper mold 200, which are set accordingly, and stamp the electrode plate 100. The forming area of ​​the electrode plate 100 is stamped symmetrically in both directions, and the nipple structure is gradually formed.

[0026] During the stamping process, as the punch 220 delves deeper into the die 230, the volumes of the first chamber 240 and the second chamber 250 decrease. At this point, the oil extraction assembly 500 extracts the oil from the first chamber 240 and the second chamber 250, ensuring that the rate of decrease in lubricant volume is less than the rate of decrease in the volumes of the first chamber 240 and the second chamber 250. This results in the lubricant in the first chamber 240 and the second chamber 250 having a certain pressure. During the stamping process, the pressure of the lubricant is used to apply pressure to the electrode plate 100, improving pressure uniformity, preventing pressure concentration, and allowing the lubricant to penetrate as much as possible to the areas of the die 230 and the punch 220 with significant wear while maintaining a certain pressure, thus lubricating them. Specifically, the areas of significant wear on the die 230 and the punch 220 are: the end face of the punch 220 and the entrance radius and cavity surface of the die 230.

[0027] When the stamping is nearing completion and the nipple structure is formed, the oil extraction assembly 500 rapidly suctions the first chamber 240 and the second chamber 250, instantly reducing the pressure of the lubricating fluid and creating a negative pressure. This allows for the recovery of as much lubricating fluid as possible, ensuring the stamping effect and avoiding waste. Then, the punches 220 of the upper die 200 and the lower die 300 are driven to move in opposite directions. The upper die 200 is then driven to move upwards as a whole, and finally, the stamped electrode plate 100 is removed.

[0028] In this embodiment, by setting up an upper mold 200 and a lower mold 300, before stamping, the mold body 210 of the upper mold 200 abuts against the mold body 210 of the lower mold 300, using the mold bodies 210 of the upper mold 200 and the lower mold 300 to press the non-forming area on the electrode plate 100. During stamping, by allowing the punch 220 to slide up and down relative to the corresponding mold body 210, the punch 220 can move independently to stamp the electrode plate 100, avoiding excessive tensile stress on the non-forming area and reducing the support strength. Before stamping, the oil supply assembly 400 supplies oil to the first chamber 240 and the second chamber 250. In the first chamber 240, the lubricant fills the end face of the punch 220, and in the second chamber 250, the lubricant fills the cavity of the die 230, achieving sufficient lubrication of the end face of the punch 220 and the cavity of the die 230. Furthermore, during the stamping process, the oil extraction component 500 extracts the oil from the first chamber 240 and the second chamber 250, ensuring that the rate of decrease in lubricant volume is less than the rate of decrease in volume of the first chamber 240 and the second chamber 250. This results in the lubricant in the first chamber 240 and the second chamber 250 having a certain pressure. During the stamping process, the pressure of the lubricant applies pressure to the electrode plate 100, improving pressure uniformity, preventing pressure concentration, and allowing the lubricant to penetrate as much as possible into the areas of the die 230 and the punch 220 with high wear while maintaining a certain pressure. This lubricates these areas, reducing the wear rate of the punch 220 and the die 230, improving wear uniformity, and making the wear rate of each area of ​​the punch 220 and the die 230 more consistent. This avoids shape distortion of the punch 220 and the die 230 due to excessive local wear, reduces the occurrence of non-coplanarity of the nipple tops, and improves the stability of subsequent electrolysis operations.

[0029] Alternatively, the pressure of the lubricant in the first chamber 240 and the second chamber 250 may be positively correlated with the stamping pressure. As the stamping pressure gradually increases, the speed can be reduced by further decreasing the volume of lubricant, thereby making the pressure of the lubricant in the first chamber 240 and the second chamber 250 positively correlated with the stamping pressure. In other words, the closer to the final forming position, the greater the pressure of the lubricant. The purpose is to enable the lubricant to penetrate into the areas of high wear on the punch 220 and the die 230 more promptly, thereby improving the stability and effectiveness of lubrication.

[0030] In a further embodiment, the oil supply assembly 400 includes an oil supply pipe 410 disposed on the mold body 210. The oil supply pipe 410 includes a first main pipe 411 and a plurality of first branch pipes 412. The first main pipe 411 is an annular pipe with a first oil port 413. A first oil tank filled with lubricating fluid is connected to the first oil port 413 via an oil supply pump. The oil supply pump is used to deliver the lubricating fluid in the first oil tank from the first oil port 413 to the first main pipe 411. The plurality of first branch pipes 412 are all connected to the first main pipe 411. The oil extraction assembly 500 includes an oil extraction pipe 510, which is disposed on the mold body 210. The oil extraction pipe 510 includes a second main pipe 511 and a plurality of second branch pipes 512. The second main pipe 511 is an annular pipe, and a second oil port 513 is provided on the second main pipe 511. A second oil tank is connected to the second oil port 513 through an oil extraction pump. The oil extraction pump is used to draw the lubricating oil in the second main pipe 511 back to the second oil tank through the second oil port 513. Multiple second branch pipes 512 are connected to the second main pipe 511, and the first branch pipe 412 and the second branch pipe 512 are arranged alternately on the mold body 210. Multiple first branch pipes 414 are provided at the lower end of the first branch pipe 412. Each first branch pipe 414 is adjacent to the first chamber 240 and / or the second chamber 250, and each first branch pipe 414 is connected to the first chamber 240 and / or the second chamber 250 arranged adjacent to it. Multiple second branch pipes 514 are provided at the lower end of the second branch pipe 512. Each second branch pipe 514 is adjacent to the first chamber 240 and / or the second chamber 250, and each second branch pipe 514 is connected to the first chamber 240 and / or the second chamber 250 arranged adjacent to it.

[0031] The mold body 210 includes a main base 211, a connecting seat 212, and a mounting seat 213. These three components are arranged sequentially and fixedly connected in the vertical direction. In the upper mold 200, the main base 211 is located above the connecting seat 212, and a driving component, a hydraulic cylinder 600, is connected to the main base 211, driving the main base 211 to move up and down. In the lower mold 300, the main base 211 is located below the connecting seat 212. An oil supply pipe 410 and an oil extraction pipe 510 are both located between the main base 211 and the connecting seat 212. The mounting seat 213 of the upper mold 200 can abut against the mounting seat 213 of the lower mold 300. Initially, the punch 220, die 230, and mounting seat 213 are on the same horizontal plane facing the electrode plate 100.

[0032] Furthermore, each punch 220 is provided with a first oil inlet channel 221 and a first oil outlet channel 222, and each die 230 is provided with a second oil inlet channel 231 and a second oil outlet channel 232. The mounting base 213 is provided with a plurality of first temporary storage cavities 215 and a plurality of second temporary storage cavities 216. The first temporary storage cavities 215 are correspondingly arranged with the first branch pipes 414, and the first temporary storage cavities 215 and their corresponding first branch pipes 414 are connected. Each first temporary storage cavity 215 is adjacent to the first oil inlet channel 221 on the punch 220 or the second oil inlet channel 231 on the die 230, and each first temporary storage cavity 215 is connected to the first oil inlet channel 221 on the punch 220 or the second oil inlet channel 231 on the die 230. The second temporary storage cavity 216 is provided in a one-to-one correspondence with the second branch pipe 514. The second temporary storage cavity 216 is connected to the second branch pipe 514 provided thereto. Each second temporary storage cavity 216 is adjacent to the first oil outlet channel 222 on the punch 220 or the second oil outlet channel 232 on the die 230. Each second temporary storage cavity 216 is connected to the first oil outlet channel 222 on the punch 220 or the second oil outlet channel 232 on the die 230 provided thereto.

[0033] In this embodiment, by setting up an oil supply pipe 410 and an oil extraction pipe 510, after the mounting base 213 of the upper mold 200 abuts against the mounting base 213 of the lower mold 300, the oil supply pump is started to send the lubricating fluid in the first oil tank from the first oil port 413 to the first main pipe 411. After passing through the first main pipe 411, the lubricating fluid will enter the first temporary storage chamber 215 from the first branch pipe 412 through the first branch pipe 414, and then enter the first chamber 240 and the second chamber 250 in the first temporary storage chamber 215 after passing through the first oil inlet channel 221 and the second oil inlet channel 231. During the stamping process, the oil pump is started to draw out the lubricating fluid from the first chamber 240 and the second chamber 250 through the first oil outlet 222 and the second oil outlet 232. After passing through the first oil outlet 222 and the second oil outlet 232, the oil enters the second temporary storage chamber 216, and from the second temporary storage chamber 216 through the second branch pipe 514 into the second main pipe 511, and finally flows back to the second oil tank from the second main pipe 511.

[0034] In a further embodiment, the punch 220 includes a straight section and a forming section, which are arranged sequentially and fixedly connected in the vertical direction. The straight section and the forming section are integrally formed. The ends of the first oil inlet channel 221 and the first oil outlet channel 222 that communicate with the first chamber 240 are respectively referred to as the first end and the second end, and both the first end and the second end are located at the junction of the straight section and the forming section. The ends of the second oil inlet channel 231 and the second oil outlet channel 232 that communicate with the second chamber 250 are both located at the bottom of the upper cavity of the die 230.

[0035] During the mold closing process, the connection between the straight section and the forming section of the punch 220, as well as the bottom of the cavity of the die 230, are the last parts to contact the electrode plate 100. By setting the oil inlet and oil outlet positions on the punch 220 and the die 230 at these locations, it is possible to avoid the oil inlet and oil outlet positions being blocked in advance, which would affect the normal lubrication and recovery of the lubricating fluid.

[0036] In a further embodiment, a driving cavity 217 is provided on the main seat 211 of the mold body 210, and a driving component is provided in the driving cavity 217. The driving component is used to drive multiple punches 220 to move up and down.

[0037] The driving component includes a driving plate 218 and multiple driving rods 219. The driving plate 218 is slidably sealed to the driving cavity 217, dividing the driving cavity 217 into an active chamber and a driven chamber arranged sequentially in the vertical direction. The active chamber is located on the side of the driven chamber that is vertically away from the electrode plate 100. The active chamber is connected to an external third oil tank via an oil pump body. The oil pump body is used to send oil from the third oil tank to the active chamber or to recover oil from the active chamber to the third oil tank. Multiple driving rods 219 are all arranged on the driving plate 218 and located in the driven chamber. Each driving rod 219 corresponds to a punch 220, and the driving rod 219 is connected to its corresponding punch 220. A sealing ring is provided between the driving rod 219 and the mold body 210.

[0038] In this embodiment, a driving cavity 217 is provided on the mold body 210, and a driving plate 218 is provided. When it is necessary to drive the punch 220 to move and the corresponding die 230 to close, oil is supplied to the active cavity by an oil pump. After the oil enters the active cavity, it will cause the driving plate 218 to move. The movement of the driving plate 218 will drive the driving rod 219 to move, and then drive the punch 220 to move to the side of the corresponding die 230 for mold closing. In addition, during the molding process, the driving plate 218 can be moved up and down to achieve multiple reciprocating molding of the electrode plate 100, thereby reducing the wear of the punch 220 and die 230 caused by impact and improving the molding quality.

[0039] In a further embodiment, the main body 211 of the mold 210 is also provided with multiple air channels 260. The air channels 260 are arranged vertically and face the electrode plate 100. All the air channels 260 are connected to an external air pump. After the stamping is completed, the air pump can be started to assist in demolding the electrode plate 100.

[0040] Specifically, multiple air passages 260 are connected to an external air pump via air pipes. The structure and arrangement of the air pipes are the same as those of the oil supply pipe 410 and the oil extraction pipe 510, and will not be described in detail here.

[0041] In another possible embodiment, both the concave mold 230 and the convex mold 220 are detachably connected to the corresponding mold body 210.

[0042] The concave mold 230 is screwed to the corresponding mold body 210, and the convex mold 220 is keyed to the corresponding mold body 210.

[0043] By detachably connecting the die 230 and the punch 220 to the corresponding mold body 210, it is convenient to replace the die 230 and the punch 220 after they wear out.

[0044] Furthermore, by ensuring that the lubricating fluid can penetrate and lubricate the heavily worn areas of the die 230 and punch 220 under a certain pressure, thus preventing shape distortion of the die 220 and die 230 due to excessive local wear, the thinning areas of the die 230 and punch 220 become more uniform. However, with the accumulation of processing time, all easily worn areas of the die 230 and punch 220 will thin, which will cause the electrode plate 100 to not fit tightly with the die 220 and die 230 after stamping. In this embodiment, by detachably connecting the die 230 and punch 220 to the corresponding mold body 210, the stamping process can be improved by adjusting the displacement of the punch 220 to ensure proper stamping and thus improve the forming quality of the electrode plate 100. Of course, the punch 220 and die 230 can also be directly replaced.

[0045] Based on the above embodiments, the specific working process is as follows: During stamping, the electrode plate 100 is first placed on the lower die 300, and then the upper die 200 is driven downwards as a whole, so that the die body 210 of the upper die 200 abuts against the die body 210 of the lower die 300, pressing the non-forming area of ​​the electrode plate 100 to achieve fixed positioning of the electrode plate 100 and avoid excessive tensile stress on the non-forming area during subsequent stamping. After the die body 210 is closed, a first chamber 240 is defined between the die body 210, the punch 220 and the electrode plate 100, and a second chamber 250 is defined between the die body 210, the die 230 and the electrode plate 100.

[0046] Then, the oil supply pump is started to send the lubricating fluid in the first oil tank to the first main pipe 411 through the first oil port 413. After passing through the first main pipe 411, the lubricating fluid will enter the first temporary storage chamber 215 through the first branch pipe 412 and the first sub-pipe 414. In the first temporary storage chamber 215, it will enter the first chamber 240 and the second chamber 250 after passing through the first oil inlet channel 221 and the second oil inlet channel 231. In the first chamber 240, the lubricating fluid fills the end face of the punch 220, and in the second chamber 250, the lubricating fluid fills the cavity of the die 230, thus achieving sufficient lubrication of the end face of the punch 220 and the cavity of the die 230.

[0047] When it is necessary to move the punch 220 and close the corresponding die 230, oil is pumped into the active chamber using an oil pump. Once the oil enters the active chamber, it causes the drive plate 218 to move. The movement of the drive plate 218 drives the drive rod 219, which in turn drives the punch 220 to move towards the corresponding die 230 for closing. The forming area of ​​the electrode plate 100 is then subjected to bidirectional symmetrical stamping to gradually form a protruding structure.

[0048] During the stamping process, as the punch 220 goes deeper into the die 230, the volume of the first chamber 240 and the second chamber 250 will also decrease. At this time, the oil pump is started to draw the lubricant in the first chamber 240 and the second chamber 250 out of the first oil outlet 222 and the second oil outlet 232. The oil will enter the second temporary storage chamber 216 after passing through the first oil outlet 222 and the second oil outlet 232, and then enter the second main pipe 511 from the second temporary storage chamber 216 through the second branch pipe 514, and finally flow back to the second oil tank from the second main pipe 511. The lubricant's volume decreases at a rate less than that of the first chamber 240 and the second chamber 250, thus ensuring that the lubricant in the first and second chambers 240 has a certain pressure. During the stamping process, the pressure of the lubricant is used to apply pressure to the electrode plate 100, improving the uniformity of pressure, preventing pressure concentration, and allowing the lubricant to penetrate as much as possible into the areas of the die 230 and the punch 220 with high wear while maintaining a certain pressure, and lubricating them.

[0049] When the stamping is nearing completion and the nipple structure is formed, the oil extraction assembly 500 rapidly suctions the first chamber 240 and the second chamber 250, instantly reducing the pressure of the lubricating fluid and creating a negative pressure. This allows for the recovery of as much lubricating fluid as possible, ensuring the stamping effect and avoiding waste. Then, the punches 220 of the upper die 200 and the lower die 300 are driven to move in opposite directions. The upper die 200 is then driven to move upwards as a whole, and finally, the stamped electrode plate 100 is removed.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A stamping die for an electrolytic cell electrode plate, used for stamping the electrode plate, characterized in that: The system includes an upper mold and a lower mold, which are arranged vertically in sequence. The upper mold is located above the lower mold and can move up and down. The electrode plate is placed on the lower mold. The upper mold includes a mold body, multiple punches, and multiple dies, which are staggered on the mold body. In the initial state, the punches, dies, and the end of the mold body facing the electrode plate are on the same horizontal plane. The punches can move up and down relative to the mold body, and the dies can move with the mold body. The upper and lower molds are arranged opposite each other in the vertical direction, and the structure and connection method of the lower mold are the same as those of the upper mold. The punches / dies on the upper mold correspond one-to-one with the dies / punches on the lower mold. The punches / dies on the upper mold can... The corresponding die / punch on the lower mold closes and stamps the electrode plate; the upper mold body can move up and down to abut or disengage from the lower mold body, and when the upper mold body abuts with the lower mold body, a first chamber is defined between the mold body, the punch and the electrode plate, and a second chamber is defined between the mold body, the die and the electrode plate; the mold body is provided with an oil supply component and an oil extraction component. The oil supply component is used to supply lubricating fluid to the first and second chambers after the upper mold body abuts with the lower mold body, and the oil extraction component is used to extract the lubricating fluid in the first and second chambers during the stamping process, and the rate of decrease in the volume of the lubricating fluid is less than the rate of decrease in the volume of the first and second chambers.

2. The stamping die for an electrolytic cell electrode plate according to claim 1, characterized in that: The oil supply assembly includes an oil supply pipe mounted on the mold body. The oil supply pipe includes a first main pipe and multiple first branch pipes. The first main pipe has a first oil port, and a first oil tank filled with lubricating fluid is connected to the first oil port via an oil supply pump. The oil supply pump delivers the lubricating fluid from the first oil tank to the first main pipe through the first oil port. All the multiple first branch pipes are connected to the first main pipe. The oil extraction assembly includes an oil extraction pipe mounted on the mold body. The oil extraction pipe includes a second main pipe and multiple second branch pipes. The second main pipe has a second oil port, and a second oil tank is connected to the second oil port via an oil extraction pump. The oil extraction pump is used for... The lubricating oil in the second main pipe is drawn back to the second oil tank through the second oil port; multiple second branch pipes are connected to the second main pipe, and the first branch pipe and the second branch pipe are arranged alternately on the mold body. Multiple first branch pipes are provided at the lower end of the first branch pipe. Each first branch pipe is adjacent to the first chamber and / or the second chamber, and each first branch pipe is connected to the first chamber and / or the second chamber arranged adjacent to it. Multiple second branch pipes are provided at the lower end of the second branch pipe. Each second branch pipe is adjacent to the first chamber and / or the second chamber, and each second branch pipe is connected to the first chamber and / or the second chamber arranged adjacent to it.

3. The stamping die for an electrolytic cell electrode plate according to claim 2, characterized in that: The mold body includes a main base, a connecting base, and a mounting base. The main base, connecting base, and mounting base are arranged sequentially and fixedly connected in the vertical direction. In the upper mold, the main base is located at the upper end of the connecting base; in the lower mold, the main base is located at the lower end of the connecting base.

4. The stamping die for an electrolytic cell electrode plate according to claim 3, characterized in that: Each punch has a first oil inlet channel and a first oil outlet channel, and each die has a second oil inlet channel and a second oil outlet channel. The mounting base has multiple first temporary storage cavities and multiple second temporary storage cavities. Each first temporary storage cavity is correspondingly arranged with a first branch pipe, and the first temporary storage cavity is connected to the corresponding first branch pipe. Each first temporary storage cavity is adjacent to the first oil inlet channel on the punch or the second oil inlet channel on the die, and each first temporary storage cavity is connected to the first oil inlet channel on the punch or the second oil inlet channel on the die adjacent to it. Each second temporary storage cavity is correspondingly arranged with a second branch pipe, and the second temporary storage cavity is connected to the corresponding second branch pipe. Each second temporary storage cavity is adjacent to the first oil outlet channel on the punch or the second oil outlet channel on the die, and each second temporary storage cavity is connected to the first oil outlet channel on the punch or the second oil outlet channel on the die adjacent to it.

5. The stamping die for an electrolytic cell electrode plate according to claim 4, characterized in that: The punch includes a straight section and a forming section, which are arranged sequentially and fixedly connected in the vertical direction. The straight section and the forming section are integrally formed structures. The ends of the first oil inlet and the first oil outlet that connect with the first cavity are respectively called the first end and the second end. The first end and the second end are both located at the junction of the straight section and the forming section. The ends of the second oil inlet and the second oil outlet that connect with the second cavity are both located at the bottom of the upper cavity of the die.

6. The stamping die for an electrolytic cell electrode plate according to claim 1, characterized in that: The mold body has a drive cavity, and a drive component is installed in the drive cavity. The drive component is used to drive multiple punches to move up and down.

7. The stamping die for an electrolytic cell electrode plate according to claim 6, characterized in that: The driving component includes a driving plate and multiple driving rods. The driving plate is slidably sealed to the driving cavity and divides the driving cavity into an active chamber and a driven chamber arranged sequentially in the vertical direction. The active chamber is located on the side of the driven chamber away from the electrode plate in the vertical direction. The active chamber is connected to an external third oil tank through an oil pump body. The oil pump body is used to send oil from the third oil tank to the active chamber or to recover oil from the active chamber to the third oil tank. Multiple driving rods are all arranged on the driving plate and located in the driven chamber. Each driving rod is arranged in a one-to-one correspondence with a punch, and the driving rod is connected to the punch corresponding to it.

8. The stamping die for an electrolytic cell electrode plate according to claim 1, characterized in that: The mold body is also provided with multiple air channels, which are arranged vertically and face the electrode plate. All air channels are connected to an external air pump.

9. The stamping die for an electrolytic cell electrode plate according to claim 1, characterized in that: Both the die and the punch are detachably connected to the corresponding mold body.

10. The stamping die for an electrolytic cell electrode plate according to claim 1, characterized in that: The pressure of the lubricating fluid in the first and second chambers is positively correlated with the stamping pressure.

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