A kind of sheet forming device based on high-frequency pulse water pressure expansion

Abstract

The utility model relates to a kind of based on high-frequency pulse water pressure expansion sheet forming device, in which each cavity of forming seat downside is one-to-one corresponding with each pulse high-pressure water tank on water tank seat upper side, metal plate is clamped between forming seat and water tank seat, the crank connecting rod in pulse water pressure generator is connected with crank driving device in one end, the other end extends into cylinder and is connected with cylinder piston inside cylinder, cylinder is slidably arranged in cylinder slide cylinder, and cylinder slide cylinder is connected with intensifier cylinder barrel by connecting sleeve, intensifier cylinder barrel is equipped with intensifier plunger, and intensifier plunger is connected with cylinder by plunger connecting rod, and the other end of intensifier cylinder barrel away from connecting sleeve is pulse high-pressure water output end, and each pulse high-pressure water tank is driven to supply pulse high-pressure water by the crank connecting rod of pulse water pressure generator. The utility model can complete the metal plate forming operation of multiple cavities in forming seat by pulse high-pressure water once, improve processing quality and processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of metal sheet forming technology, specifically a thin sheet forming device based on high-frequency pulsed water pressure expansion. Background Technology

[0002] Traditional one-time forming processes for thin metal sheets (such as stamping and hydraulic expansion) have the following problems: 1. Large-area thin sheets (such as stainless steel, aluminum, and steel sheets with thicknesses of 0.35mm to 2mm) are prone to wrinkling and cracking; 2. Equipment costs are high (millions to tens of millions of yuan), and the process flexibility is poor; 3. High residual stress affects forming accuracy and lifespan. Furthermore, for some special-shaped metal sheets, special hydraulic expansion forming processes need to be designed for processing. For example, patent CN115625249B discloses a hydraulic expansion forming process for cup lids, which improves the hydraulic expansion forming efficiency of cup lids by controlling water pressure parameters such as the first, second, and third water pressure values. Its control is relatively complex, and the cup lid area is relatively small, which is different from the forming process of large-area thin sheets. Utility Model Content

[0003] The purpose of this invention is to provide a thin plate forming device based on high-frequency pulsed water pressure expansion. Its pulsed water pressure generator can generate pulsed high-pressure water and can complete the metal plate forming process of multiple cavities in the forming seat at one time, thereby improving the processing quality and efficiency of metal plate water expansion forming.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A thin plate forming device based on high-frequency pulsed water pressure expansion includes a pulsed water pressure generator and a sealingly stacked forming seat and a water tank seat. The forming seat has multiple cavities on its lower side, and the water tank seat has multiple pulsed high-pressure water tanks on its upper side, with each cavity and water tank corresponding to a specific location. A metal plate is sandwiched between the forming seat and the water tank seat. The pulsed water pressure generator includes a crank connecting rod, a cylinder, a cylinder slide, and a booster cylinder. One end of the crank connecting rod is connected to a crank drive device, and the other end... One end extends into the cylinder and is connected to the cylinder piston inside the cylinder. The cylinder is slidably disposed in the cylinder slide, and the end of the cylinder slide away from the crank connecting rod is connected to the turbocharger cylinder through a connecting sleeve. The turbocharger cylinder is provided with a turbocharger plunger, and the turbocharger plunger is connected to the cylinder through a plunger connecting rod. The end of the turbocharger cylinder away from the connecting sleeve is the pulse high-pressure water output end, and each pulse high-pressure water tank is driven by the crank connecting rod of the pulse water pressure generator to supply pulse high-pressure water.

[0006] The water tank seat has a sealing groove on its upper edge, and a sealing ring is provided in the sealing groove.

[0007] The crank drive device includes a rotary drive device and a drive wheel, wherein the drive wheel is mounted on the output shaft of the rotary drive device, and one end of the crank connecting rod is connected to one side of the drive wheel.

[0008] The water tank seat has a distribution chamber inside. The pulse high-pressure water output end of the booster cylinder is connected to the distribution chamber through a high-pressure water output pipeline. The upper side of the distribution chamber has multiple output channels that are respectively connected to the corresponding pulse high-pressure water tank.

[0009] The distribution chamber is provided with an air venting pipe on one side, and the air venting pipe is equipped with a pressure sensor and an air discharge valve.

[0010] The turbocharger cylinder is provided with a three-way component and a water supply pipeline on the side away from the connecting sleeve. The pulse high-pressure water output end of the turbocharger cylinder is connected to the water tank seat through the high-pressure water output pipeline. The high-pressure water output pipeline, the water supply pipeline, and the pulse high-pressure water output end of the turbocharger cylinder are respectively connected to the corresponding ports on the three-way component. A pressure-holding check valve is provided on the high-pressure water output pipeline, and a water supply check valve is provided on the water supply pipeline.

[0011] The water supply pipeline is connected to a buffer tank, and the upper end of the buffer tank is equipped with a tap water control valve.

[0012] The cylinder end is provided with a threaded sleeve, and the upper end of the plunger connecting rod is threadedly fixed in the threaded sleeve.

[0013] A spring pressure block is provided on the lower side of the cylinder end. A sealing block is provided inside the connection between the turbocharger cylinder and the cylinder slide. The upper end of the plunger connecting rod is connected to the spring pressure block, and the lower end passes through the sealing block and extends into the turbocharger cylinder and connects with the turbocharger plunger. A spring is fitted on the plunger connecting rod, and the spring is located between the spring pressure block and the sealing block.

[0014] The advantages and positive effects of this utility model are as follows:

[0015] 1. This utility model utilizes pulsed high-pressure water generated by a pulsed water pressure generator to perform water expansion molding on a metal plate. The flow rate and pressure generated in each pulse cycle of the pulsed high-pressure water are adaptive. When the metal plate is relatively soft (initially formed), the flow rate output by the pulsed water pressure generator is large and the pressure is low. As the metal plate continues to stretch and its hardness increases, the flow rate output by the pulsed water pressure generator adaptively decreases.

[0016] 2. This utility model can complete the metal plate forming process of multiple cavities in the forming seat in one go, and the pulse high pressure water tanks inside the water tank seat can form pulse high water pressure of the same frequency under the action of the pulse water pressure generator, which can ensure the processing consistency of each metal plate forming part.

[0017] 3. This utility model is equipped with a pressure-holding check valve and a water supply check valve to cooperate with the pulsed high water pressure output by the pulsed water pressure generator. During the duration of the pulsed high water pressure, the water supply check valve automatically shuts off and the pressure-holding check valve opens. During the period when the pulsed high water pressure drops, the pressure-holding check valve automatically shuts off to maintain pressure and the water supply check valve automatically opens. The time-sharing action of the two check valves does not require a special control mechanism, and it can adaptively synchronize with the reciprocating movement of the booster plunger.

[0018] 4. The stress distribution of the metal plate after processing and forming by this utility model is more uniform. This is because the high-frequency micro-deformation allows the material to generate local plastic flow after each pulse impact and release the elastic deformation during the pulse fall period. The next pulse water pressure finds the weak stress point again and starts to stretch. This process is repeated continuously, which can gradually adjust the internal strain distribution and avoid the accumulation of elastic rebound area. This avoids the generation of a severe stress gradient caused by a single large deformation and also makes the metal plate not spring back after forming, eliminating the need for post-forming straightening. In addition, this utility model can also reduce stress concentration. The small amount of deformation can reduce the instantaneous stress peak in local areas, thereby reducing the accumulation of residual stress caused by the uneven yield strength of the material (inconsistent size and orientation of the internal crystal domains).

[0019] 5. This utility model automatically allocates the tensioning points of the metal plate to make the stress distribution uniform. The uniformity of the internal microstructure of the material is relative, while the non-uniformity is absolute. When tensioning occurs, it always starts from the weakest point. Another characteristic of the material is that once the tensioning approaches the plastic deformation strength, the strength will increase non-linearly (with the increase of the strain strength exponential, commonly known as hardening). That is to say, when the next pressure impact pulse arrives, the point that was originally the weakest has become stronger, and the force transmission will automatically start from another weakest point to stretch. This forms a mechanism for automatically allocating the tensioning points to make the stress distribution uniform.

[0020] 6. The cavity inside the molding seat of this utility model will constrain the free deformation of the material at the end of the metal plate molding process. As the single impact flow rate decreases at the end of the molding process, the impact pressure will increase. This can force the metal plate molding part to fit the cavity and correct the small deviations in the multiple deformation processes, so that the stress distribution is close to the ideal state.

[0021] 7. At the same time, the forming mold itself is not subjected to the huge impact of traditional stamping, so there is no need to use high-strength steel to make the forming mold. Therefore, this utility model can significantly reduce production costs while improving the processing quality and precision of the workpiece. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the device of this utility model.

[0023] Figure 2 This is a schematic diagram of a pulse water pressure generator structure used in this utility model.

[0024] Figure 3 for Figure 2 A schematic diagram of the movement pulse curve of the connecting rod in one cycle.

[0025] Figure 4 for Figure 2 A schematic diagram of the pulsed high-pressure water pressure gradient generated by the medium-pulse water pressure generator.

[0026] Figure 5 for Figure 2 A schematic diagram of the pulsed high-pressure water flow rate stepped pattern generated by a medium-pulse water pressure generator.

[0027] Figure 6 This is a schematic diagram of another pulse water pressure generator structure used in this utility model.

[0028] Figure 7 for Figure 1 Schematic diagram of the deformation state of the metal plate forming part inside the medium cavity Figure 1 ,

[0029] Figure 8 for Figure 1 Schematic diagram of the deformation state of the metal plate forming part inside the medium cavity Figure 2 ,

[0030] Figure 9 for Figure 1 Schematic diagram of the deformation state of the metal plate forming part inside the medium cavity Figure 3 ,

[0031] Figure 10 for Figure 1 Schematic diagram of the deformation state of the metal plate forming part inside the medium cavity Figure 4 ,

[0032] Figure 11 for Figure 1 Schematic diagram of the deformation state of the metal plate forming part inside the medium cavity Figure 5 .

[0033] Among them, 1 is a pulse water pressure generator, 101 is a crank drive device, 102 is a cylinder piston, 103 is a cylinder, 1031 is a threaded sleeve, 104 is a plunger connecting rod, 105 is a booster plunger, 106 is a booster cylinder, 107 is a cylinder slide, 1071 is a connecting sleeve, 108 is a crank connecting rod, 109 is a spring pressure block, 110 is a spring, 111 is a sealing block, 2 is a forming seat, 201 is a cavity, 3 is a water tank seat, 301 is a sealing ring, 302 is a pulse high-pressure water tank, 303 is a distribution chamber, 4 is a pressure holding check valve, 5 is a water replenishment check valve, 6 is a three-way component, 7 is a pressure sensor, 8 is a workpiece metal plate, 801 is a metal plate forming part, 9 is an air discharge valve, 10 is a tap water control valve, 11 is a buffer tank, 12 is pulse high-pressure water, and 13 is a high-pressure water output pipeline. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings.

[0035] like Figures 1-11 As shown, this utility model includes a pulsed water pressure generator 1 and a sealed, stacked molding seat 2 and a water tank seat 3. The molding seat 2 has multiple cavities 201 on its lower side, and the water tank seat 3 has multiple pulsed high-pressure water tanks 302 on its upper side. The positions of each cavity 201 and each pulsed high-pressure water tank 302 correspond one-to-one. A metal plate 8 is disposed between the molding seat 2 and the water tank seat 3. Figure 2 As shown, the pulse water pressure generator 1 includes a crank connecting rod 108, a cylinder 103, a cylinder slide 107, and a booster cylinder 106. One end of the crank connecting rod 108 is connected to a crank drive device 101, and the other end extends into the cylinder 103 and is connected to the cylinder piston 102 inside the cylinder 103. The cylinder 103 is slidably disposed in the cylinder slide 107, and the end of the cylinder slide 107 away from the crank connecting rod 108 is connected to the booster cylinder 106 through a connecting sleeve 1071. The booster cylinder 106 is provided with a booster plunger 105, and the booster plunger 105 is connected to the cylinder 103 through a plunger connecting rod 104. The end of the booster cylinder 106 away from the connecting sleeve 1071 is the pulse high-pressure water output end. Each pulse high-pressure water tank 302 is driven by the crank connecting rod 108 of the pulse water pressure generator 1 to supply pulse high-pressure water 12. In this embodiment, the crank drive device 101 can be a rotary drive device such as a motor, wherein a concentric drive wheel can be provided on the output shaft of the motor, and one end of the crank connecting rod 108 is connected to one side of the drive wheel, thereby realizing the linear reciprocating movement of the piston under the rotation drive of the motor.

[0036] like Figure 1As shown, in this embodiment, the water tank seat 3 has a sealing groove on the edge of the contact surface with the workpiece plate 8, and a sealing ring 301 is provided in the sealing groove. When the upper forming seat 2 and the lower water tank seat 3 are stacked to clamp the workpiece plate between the forming seat and the water tank seat, and pulse high-pressure water 12 is filled in, the sealing ring 301 is pressed to ensure sealing.

[0037] like Figure 1 As shown, in this embodiment, the water tank seat 3 is provided with a distribution cavity 303. The pulse high-pressure water output end of the booster cylinder 106 is connected to the distribution cavity 303 through the high-pressure water output pipeline 13. The upper side of the distribution cavity 303 is provided with multiple output channels that are respectively connected to the corresponding pulse high-pressure water tank 302.

[0038] like Figure 1 As shown, in this embodiment, an air venting pipe is provided on one side of the distribution chamber 303. A pressure sensor 7 and an air venting valve 9 are provided on the air venting pipe. The air venting valve 9 is used to vent the air in the distribution chamber 303, each output channel and the pulse high-pressure water tank 302. After the pulse high-pressure water tank 302 is injected with pulse high-pressure water 12, the pressure sensor 7 detects the water pressure in the distribution chamber 303 in real time, that is, detects the pressure of the pulse high-pressure water 12.

[0039] like Figures 1-2 As shown, in this embodiment, the turbocharger cylinder 106 is provided with a three-way component 6 and a water supply pipeline on the side away from the cylinder slide 107. The high-pressure water output pipeline 13, the water supply pipeline, and the pulse high-pressure water output terminal of the turbocharger cylinder 106 are respectively connected to the corresponding ports on the three-way component 6. The high-pressure water output pipeline 13 is provided with a pressure-holding check valve 4, and the water supply pipeline is provided with a water supply check valve 5. The pressure-holding check valve 4, the water supply check valve 5, and the three-way component 6 are all commercially available products.

[0040] like Figure 1 As shown, in this embodiment, the water supply pipeline is connected to a buffer tank 11, and the upper end of the buffer tank 11 is equipped with a tap water control valve 10 for controlling the incoming water input. The buffer tank 11 is used to buffer the incoming water to remove any air that may be present in the incoming water. The tap water control valve 10 is a commercially available product.

[0041] like Figure 2 As shown, in one embodiment of this utility model, the cylinder 103 has a threaded sleeve 1031 at its end, and the upper end of the plunger connecting rod 104 is threadedly fixed in the threaded sleeve 1031, thereby achieving a fixed connection with the end of the cylinder 103. And as... Figure 6As shown, in another embodiment of this utility model, a spring pressure block 109 is provided on the lower side of the end of the cylinder 103. A sealing block 111 is provided inside the connection between the turbocharger cylinder 106 and the cylinder slide 107. The upper end of the plunger connecting rod 104 is connected to the spring pressure block 109, and the lower end passes through the sealing block 111 and extends into the turbocharger cylinder 106 and is connected to the turbocharger plunger 105. A spring 110 is fitted on the plunger connecting rod 104, and the spring 110 is located between the spring pressure block 109 and the sealing block 111. When the plunger connecting rod 104 is driven to move by the cylinder 103, the spring pressure block 109 and the sealing block 111 cooperate to compress the spring 110. When the cylinder 103 returns, the plunger connecting rod 104 automatically resets under the action of the spring 110.

[0042] The working principle of this utility model is as follows:

[0043] Before this utility model starts working, the metal plate 8 is placed between the forming cavity plate 2 and the water tank seat 3. Then, the air discharge valve 9 of the water tank seat 3 is opened, and the water supply control valve 10 is opened. After the tap water passes through the buffer tank 11, the water replenishment check valve 5, the three-way component 6, and the pressure holding check valve 4, it enters each pulse high-pressure water tank 302 in the water tank seat 3 through the high-pressure water output pipeline 13. At the same time, the water enters the sealing groove and pushes the sealing ring 301 to a sealed state. The air in each pulse high-pressure water tank 302 and the distribution chamber 303 is driven by the water to the air discharge valve 9 for discharge. When the air discharge valve 9 discharges water, the air is completely discharged and the air discharge valve 9 is closed.

[0044] When this invention is in operation, the crank drive device 101 in the pulse water pressure generator 1 is powered on and drives the crank connecting rod 108 to move back and forth periodically. The crank connecting rod 108 drives the cylinder piston 102 to move back and forth inside the cylinder 103, and also drives the cylinder 103 to move back and forth inside the cylinder slide 107. The cylinder 103 then drives the booster plunger 105 to move back and forth inside the booster cylinder 106 through the plunger connecting rod 104, thereby driving the water pulse output in the booster cylinder 106 to form pulsed high-pressure water 12. Figures 7-11 As shown, the metal plate portion located in each cavity 201 of the forming base 2 is the metal plate forming part 801. Under the action of pulsed high-pressure water 12, the metal plate forming part 801 gradually moves towards the arc wall side of the cavity 201 and finally fits with the arc wall of the cavity 201 to complete the stamping forming.

[0045] Furthermore, during operation, the periodic movement of the crank connecting rod 108 causes the cylinder piston 102 to compress the gas in the cylinder 103, forming a narrow pneumatic pulse burst, which is further transmitted to the booster plunger 105 to form a narrow pulse water pressure output, wherein, for example... Figure 3As shown, when the cylinder piston 102 moves forward to compress air, because the cylinder piston 102 moves forward quickly, while the cylinder 103 has a large mass and a slow start-up, the cylinder piston 102 will first rapidly compress the gas. When the cylinder piston 102 reaches the first dead center of its stroke... Figure 3 When the crankshaft connecting rod 108 reaches its maximum forward displacement (with the highest point of region B being the limit displacement of the crankshaft connecting rod 108), sufficient explosive force is generated to forcefully and rapidly push cylinder 103 out, thereby driving the supercharger plunger 105 to forcefully and rapidly push out and quickly squeeze the water out of the supercharger cylinder 106, thus generating instantaneous high-power pulse water pressure and flow. The instantaneous pulse power generated at this time is much higher than the average power of the motor (i.e., the crank drive device 101). When the crankshaft connecting rod 108 drives the cylinder piston 102 back to its original position, cylinder 103, due to inertia and lubrication factors, will still not keep up with the return speed of cylinder piston 102. At this time, cylinder piston 102 quickly returns to near the rear dead center (…). Figure 2 In region D, where the lowest point of region D is the limit displacement of the crank connecting rod 108 moving backward, the pressure inside cylinder 103 will decrease to its limit, reducing the return resistance of cylinder 103 and accelerating the return speed. Therefore, as Figure 3 As shown, this invention can compress energy along the time axis under the law of conservation of energy and form a high energy density during the pulse duration. It concentrates the originally evenly distributed motor kinetic energy (i.e., crank drive device 101) into 1 / 6 to 1 / 8 of the cycle of one crank connecting rod 108 movement within one cycle (i.e., Figure 2 The burst of power from region B can reach 6 to 8 times the rated power of the motor.

[0046] Figure 3 In the figure, the vertical axis U represents the amplitude of the movement of the crank connecting rod 108, ω represents the reciprocating frequency of the crank connecting rod 108, t is time, and A, C, and E represent the midpoints of the movement stroke of the crank connecting rod 108. In this embodiment, the diameter of the supercharger plunger 105 is 20mm, the reserved stroke is 100mm, the actual maximum stroke is 45mm, the motor (i.e., the crank drive device 1) has a power of 1600 watts, the motor-driven crank connecting rod 108 moves at a frequency of 33.33 times / second, the period is 30ms, the impact pulse width is 3.75ms, and the effective energy transmitted by the cylinder piston 102 to the supercharger plunger 105 within the pulse period can reach 40-80 joules. The flow rate and pressure generated per pulse period during water expansion molding are adaptive. When the metal plate material is relatively soft (e.g., at the beginning of molding), the output flow rate per pulse generated by this invention is large and the pressure is low. As the hardness of the metal plate increases with continuous stretching, the flow rate per pulse will decrease, but the product of flow rate and pressure remains unchanged. Figure 4 The diagram shows the pulsed water pressure p output in this embodiment, which increases in a stepwise manner with time. Figure 5The diagram shows the pulsed water flow rate q output in this embodiment. The flow rate decreases in steps over time. Initially, the metal plate forming section 801 is relatively soft, absorbing the impact and resulting in a relatively low pulse pressure and a large pulse flow rate. Later, as the metal plate gradually stretches and hardens, its deformation shrinks, thus decreasing the pulse flow rate and increasing the pulse pressure. Figure 11 As shown, when the metal sheet forming part 801 is completely attached to the cavity 201 of the forming base 2, when the pulse impact occurs again, the metal sheet has no deformable space, the pulse flow rate is 0, and the pulse pressure reaches the highest range. At this time, the pressure sensor 7 can be used to detect the pressure value and send a signal to indicate that the forming process has been completed.

[0047] One preparation method of this utility model includes the following steps:

[0048] Step 1: Determine the peak pressure and frequency of the pulse high-pressure water 12 according to the forming requirements of the metal plate 8, and then determine the operating frequency of the crank connecting rod 108, that is, determine the control parameters of the pulse water pressure generator 1 (mainly the control parameters of the crank drive device 101), and at the same time determine the termination forming pressure value of the pulse high-pressure water 12.

[0049] In this embodiment, the metal plate 8 is a stainless steel plate with a thickness of 0.35mm. The pulse high-pressure water tank 302 in the water tank seat 3 has a depth of 4.12mm and a length of 2200mm, with a total of 82 pulse high-pressure water tanks 302. According to calculation, the impact energy of each pulse cycle of the pulse high-pressure water 12 is 40 joules. Under the condition of 33.3 impacts per second, its forming speed is 9.8 seconds, which can meet the production requirements.

[0050] In this embodiment, based on the above conditions, the peak pulse pressure of the pulsed high-pressure water 12 is determined to be 45 MPa, the pulse frequency is 33.3 Hz, and the system monitoring (i.e., pressure sensor 7 monitoring) shows that the average water pressure rises to 40 MPa (this is the termination molding pressure value, i.e., ...). Figure 3 The molding process will automatically terminate when the average pressure in region B is reached.

[0051] Step 2: Place the metal plate 8 between the forming base 2 and the water tank base 3.

[0052] In this embodiment, the molding seat 2 can be driven to rise and fall by a lifting device, such as a general-purpose lifting hydraulic cylinder. When the molding seat 2 rises to a set height, the metal plate 8 is placed in, and then the molding seat 2 falls.

[0053] Step 3: Fill the water tank base 3 with water and purge the air.

[0054] In this embodiment, the air discharge valve 9 on one side of the water tank seat 3 is opened first, and then the water supply control valve 10 is opened. After the water passes through the buffer tank 11, the water replenishment check valve 5, the three-way component 6, and the pressure holding check valve 4, it enters each pulse high-pressure water tank 302 in the water tank seat 3 through the high-pressure water output pipeline 13. At this time, the air is driven by the water to the air discharge valve 9 for discharge. When water flows out of the drain pipeline, the air is discharged and the air discharge valve 9 is closed.

[0055] Step 4: The pulse water pressure generator 1 starts according to the control parameters determined in Step 1 and outputs pulsed high-pressure water 12. At the same time, the pressure-holding check valve 4 and the water supply check valve 5 automatically cooperate to open and close. Specifically:

[0056] During the duration of the pulsed high-pressure water 12 ( Figure 3 In area B), the water replenishment check valve 5 automatically shuts off. The pulse high-pressure water 12 is output from the pulse high-pressure water output end of the booster cylinder 106 and then opens the pressure holding check valve 4 through the three-way element 6. It then enters each pulse high-pressure water tank 302 in the water tank seat 3 through the high-pressure water output pipeline 13. The pressure of the pulse high-pressure water 12 in the pulse high-pressure water tank 302 increases, and forces the metal plate forming part 801 to deform and move closer to the arc-shaped cavity wall in the corresponding cavity 201.

[0057] During the pulse drop-off period of pulse high-pressure water 12 ( Figure 3 In area D of the system, the pressure-holding check valve 4 automatically shuts off, and the water replenishment check valve 5 automatically opens. The incoming water in the buffer tank 11 enters the booster cylinder 106 of the pulse water pressure generator 1, preparing for the next pulse water pressure.

[0058] This embodiment repeats the process 33.3 times per second.

[0059] Step 5: When the pressure value of the pulsed high-pressure water 12 detected by the pressure sensor 7 reaches the termination molding pressure value set in Step 1, the pulsed water pressure generator 1 stops, and the molding ends.

[0060] At this time, as Figure 11 As shown, the metal sheet forming part 801 is tightly attached to the arc-shaped cavity wall of the corresponding cavity 201 and cannot deform. The graphic shape is for illustrative purposes only; the actual deformation arc is chord length 8mm and arc height 2.8mm.

[0061] In one application example, this utility model is used to process and form ultra-thin, large-format grooved metal plates for photovoltaic panel waste heat collection and water-cooled heat dissipation shells for new energy vehicle batteries. According to actual production tests, its accuracy can be improved by 30% and the cost reduced by 20%.

Claims

1. A thin plate forming device based on high-frequency pulsed hydrostatic expansion, characterized in that: The device includes a pulse water pressure generator (1), a sealed and stacked molding seat (2) and a water tank seat (3). The molding seat (2) has multiple cavities (201) on its lower side, and the water tank seat (3) has multiple pulse high-pressure water tanks (302) on its upper side. The positions of each cavity (201) and each pulse high-pressure water tank (302) correspond one-to-one. A metal plate (8) is sandwiched between the molding seat (2) and the water tank seat (3). The pulse water pressure generator (1) includes a crank connecting rod (108), a cylinder (103), a cylinder slide (107), and a booster cylinder (106). One end of the crank connecting rod (108) is connected to the crank drive device (101), and the other end extends into the cylinder (103) and is connected to the cylinder (103). The cylinder piston (102) inside is connected, the cylinder (103) is slidably disposed in the cylinder slide (107), and the end of the cylinder slide (107) away from the crank connecting rod (108) is connected to the booster cylinder (106) through the connecting sleeve (1071). The booster cylinder (106) is provided with a booster plunger (105), and the booster plunger (105) is connected to the cylinder (103) through the plunger connecting rod (104). The end of the booster cylinder (106) away from the connecting sleeve (1071) is the pulse high-pressure water output end, and each pulse high-pressure water tank (302) is driven by the crank connecting rod (108) of the pulse water pressure generator (1) to supply pulse high-pressure water (12).

2. The thin plate forming device based on high-frequency pulsed hydrostatic expansion according to claim 1, characterized in that: The water tank seat (3) has a sealing groove on its upper edge, and a sealing ring (301) is provided in the sealing groove.

3. The thin plate forming device based on high-frequency pulsed hydrostatic expansion according to claim 1, characterized in that: The crank drive device (101) includes a rotary drive device and a drive wheel, wherein the drive wheel is disposed on the output shaft of the rotary drive device, and one end of the crank connecting rod (108) is connected to one side of the drive wheel.

4. The thin plate forming device based on high-frequency pulsed hydrostatic expansion according to claim 1, characterized in that: The water tank seat (3) has a distribution chamber (303) inside. The pulse high-pressure water output end of the booster cylinder (106) is connected to the distribution chamber (303) through the high-pressure water output pipeline (13). The upper side of the distribution chamber (303) has multiple output channels that are connected to the corresponding pulse high-pressure water tank (302).

5. The thin plate forming device based on high-frequency pulsed hydrostatic expansion according to claim 4, characterized in that: The distribution chamber (303) is provided with an air venting pipe on one side, and the air venting pipe is provided with a pressure sensor (7) and an air discharge valve (9).

6. The thin plate forming device based on high-frequency pulsed hydrostatic expansion according to claim 1, characterized in that: The booster cylinder (106) is provided with a three-way element (6) and a water supply pipeline on the side away from the connecting sleeve (1071). The pulse high-pressure water output end of the booster cylinder (106) is connected to the water tank seat (3) through the high-pressure water output pipeline (13). The high-pressure water output pipeline (13), the water supply pipeline and the pulse high-pressure water output end of the booster cylinder (106) are respectively connected to the corresponding port on the three-way element (6). The high-pressure water output pipeline (13) is provided with a pressure-holding check valve (4) and the water supply pipeline is provided with a water supply check valve (5).

7. The thin plate forming device based on high-frequency pulsed hydrostatic expansion according to claim 6, characterized in that: The water supply pipeline is connected to a buffer tank (11), and the upper end of the buffer tank (11) is equipped with a tap water control valve (10).

8. The thin plate forming device based on high-frequency pulsed hydrostatic expansion according to claim 1, characterized in that: The cylinder (103) is provided with a threaded sleeve (1031) at its end, and the upper end of the plunger connecting rod (104) is threadedly fixed in the threaded sleeve (1031).

9. The thin plate forming device based on high-frequency pulsed hydrostatic expansion according to claim 1, characterized in that: A spring pressure block (109) is provided on the lower side of the end of the cylinder (103). A sealing block (111) is provided inside the connection between the turbocharger cylinder (106) and the cylinder slide (107). The upper end of the plunger connecting rod (104) is connected to the spring pressure block (109), and the lower end passes through the sealing block (111) and extends into the turbocharger cylinder (106) and is connected to the turbocharger plunger (105). A spring (110) is fitted on the plunger connecting rod (104), and the spring (110) is located between the spring pressure block (109) and the sealing block (111).

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