Stamping integrated equipment and method of energy storage steel row

Abstract

The present application relates to the field of stamping equipment, especially to a kind of stamping integrated equipment and method of energy storage steel row, including rack, the top of the rack is fixedly connected with workbench, the top of the workbench is installed with bottom plate, the top of the bottom plate is installed with lower die plate, the rear side of the workbench is installed with fixed frame, the front end of the fixed frame is fixedly connected with hydraulic cylinder in upper portion, the bottom of the hydraulic cylinder is fixedly connected with mounting plate in telescopic end, the bottom of the mounting plate is installed with upper die plate by bolt, the bottom of the upper die plate is all penetrated and slidably connected with guide pillar, the bottom end of the guide pillar is all fixedly connected with middle pressure plate, ultrasonic vibration head is arranged in bending stage, and high-frequency vibration is transmitted to bending plate by vibration piece and hydraulic medium, high-frequency dynamic stress disturbance is applied to material while the mechanical bending force acts, can promote material internal dislocation movement and plastic flow, reduce local deformation resistance, to effectively reduce bending forming force.

Description

Technical Field

[0001] This invention relates to the field of stamping equipment, and more particularly to an integrated stamping equipment and method for energy storage steel bars. Background Technology

[0002] Energy storage steel busbars are commonly used conductive connectors in energy storage battery systems, power equipment, and new energy equipment. They are typically formed from steel strips or metal sheets through processes such as punching, bending, and cutting. Because energy storage steel busbars need to be assembled with battery modules, busbars, and connecting terminals, high requirements are placed on hole accuracy, bending angle accuracy, and overall dimensional consistency. Currently, the processing of energy storage steel busbars typically involves separate punching and bending equipment. First, the holes are machined using a punch press, and then the steel busbars are bent. During bending, energy storage steel busbars are prone to generating significant plastic deformation resistance and residual stress, especially when the bending radius is small or the material strength is high. This can easily lead to springback, causing bending angle deviations. Furthermore, stress concentration may occur in the bending area, increasing the risk of cracking and affecting product quality and service life. Existing equipment usually relies solely on mechanical pressure for forming, lacking effective auxiliary measures to reduce forming resistance and improve the internal stress state of the material, thus making it difficult to further improve forming quality and dimensional stability.

[0003] On the other hand, waste generated during the punching process tends to accumulate inside the mold. When the waste cannot be discharged in time, it can easily cause jamming and blockage, affecting the continuity and stability of subsequent processing. Furthermore, during the pressure holding stage after punching, the workpiece may experience slight displacement due to vibration or stress release, which can affect the hole position accuracy and overall forming accuracy. Therefore, we propose an integrated stamping equipment and method for energy storage steel bars to solve the aforementioned problems. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by proposing an integrated stamping device and method for energy storage steel bars.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a stamping integrated equipment for energy storage steel bars, comprising a frame, a workbench fixedly connected to the top of the frame, a base plate installed at the center of the top of the workbench, a lower template installed at the center of the top of the base plate, a fixed frame installed on the rear side of the workbench, a hydraulic cylinder fixedly connected to the upper front end of the fixed frame, an installation plate fixedly connected to the telescopic end of the bottom of the hydraulic cylinder, an upper template installed on the bottom of the installation plate by bolts, guide posts penetrating and slidably connected to the bottom of the upper template, a central pressure plate fixedly connected to the bottom of each guide post, sliding sleeves fixedly connected to the front and rear of the central pressure plate and the upper template, the sliding sleeves being filled with hydraulic oil, and multiple stamping presses fixedly connected to the bottom of the upper template. The stamping block and bending plate are provided with a cutter on the side of the stamping block away from the bending plate. The middle pressure plate and the lower template are both provided with reserved openings corresponding to the stamping block. The upper template has an inner cavity II in the middle. Both sides of the inner cavity II are connected by a connecting channel I. The end of the connecting channel I away from the inner cavity II is connected to the inner cavity I. The bottom of the inner cavity I is connected to the inside of the sliding sleeve. The connecting channel I and the inner cavity II are filled with hydraulic oil. Multiple ultrasonic vibrating heads are installed in the upper part of the inner cavity II. A vibrating plate I is provided in the lower part of the ultrasonic vibrating head. Multiple vibrating plates II are fixedly connected to the bottom of the vibrating plate I. The vibrating plates II are respectively arranged inside the stamping block and the bending plate. The inside of the stamping block and the bending plate are connected to the inner cavity II.

[0006] Preferably, a feed roller is installed on one side of the workbench, a discharge platform is installed on the other side of the workbench, and a multi-axis robot is provided on one side of the rear of the workbench. The multi-axis robot is used for unloading the energy storage steel billet.

[0007] Preferably, a control panel is installed on one side of the upper front end of the frame, and the control panel is used to control other electrical control equipment.

[0008] Preferably, positioning sleeves are installed at the four corners of the central pressure plate and the upper template, and positioning posts are installed at the top corner of the bottom plate. The positioning posts correspond to the positioning sleeves and are slidably connected to them.

[0009] Preferably, a discharge valve is provided at the top of the frame, and a discharge port is provided in the middle of the lower template. The inside of the frame is connected to the inside of the discharge port through the discharge valve.

[0010] Preferably, each guide post is fitted with a reset spring on its outer periphery, and the reset spring is disposed between the upper template and the central pressure plate.

[0011] Preferably, the central pressure plate has a cavity two in the middle, and cavities one on both sides of the cavity two are connected. The cavities one are all located on the front and rear sides of the central pressure plate. The top of each cavity one is connected to the inside of the sliding sleeve. Both the cavity two and the cavity one are filled with hydraulic oil. A vibrating pressure plate is provided at the bottom of the cavity two. A small ultrasonic vibrating head is installed inside the cavity two. The inner and outer peripheries of the vibrating pressure plate are fixedly connected to the central pressure plate by flexible connecting strips.

[0012] Preferably, the lower template has an annular cavity in the middle, an upper through hole is evenly distributed in the upper part of the annular cavity, and a lower through hole is evenly distributed in the bottom of the annular cavity. Both the upper and lower through holes penetrate the lower template, and two connecting channels are formed on both sides of the rear part of the lower template.

[0013] Preferably, a pump compartment is installed in the middle of the front side of the fixed frame, a vacuum pump is installed inside the pump compartment, the working end of the vacuum pump is fixedly connected to an air extraction pipe, the end of the air extraction pipe is fixedly connected to a connecting pipe, the ends of the connecting pipe are all fixedly installed inside the connecting channel two, the connecting channel two is used to connect the annular cavity and the connecting pipe, and an infrared sensor is installed on the upper front side of the pump compartment.

[0014] Preferably, a method for using an integrated stamping equipment for energy storage steel bars includes the following steps: S1. Equipment preparation and loading: S1.1 Start the machine using the control panel and check the operating status of the hydraulic cylinder, ultrasonic vibrator, vacuum pump in the pump compartment, infrared sensor, and multi-axis robot components in sequence to confirm that there are no abnormalities in the equipment. S1.2 Place the energy storage steel strip on the feed roller, and the feed roller will transport the steel strip to accurately deliver the energy storage steel billet to the processing station between the lower template and the central pressure plate. S2. Pressing, positioning, and bending operations: S2.1 The hydraulic cylinder drives the bottom telescopic end to move the mounting plate and the upper template downward as a whole. Relying on the sliding cooperation between the positioning sleeve and the positioning column, the upper template, the middle pressure plate and the lower template are precisely aligned. S2.2 During the downward movement, the central pressure plate first contacts the energy storage steel billet, completing the pre-pressing and limiting of the workpiece; the upper template continues to press down, compressing the reset spring, and the stamping block and bending plate pass through the reserved opening of the central pressure plate to contact the workpiece; S2.3 Start the ultrasonic vibrating head in the inner cavity 2. The vibration is transmitted sequentially through the vibrating plate 1 and the vibrating plate 2, and in conjunction with the hydraulic oil in the inner cavity, to the bending plate. After bending is completed, the ultrasonic vibrating head temporarily stops working. S3. Punching operation and negative pressure fixed material discharge: S3.1 The upper template continues to press down, and the punching block matches the reserved opening of the lower template to complete the punching of the steel strip; S3.2 After the infrared sensor detects that the upper template has reached the lower position, the vacuum pump inside the pump chamber starts and extracts the air from the inner annular cavity of the lower template through the air extraction pipe, connecting pipe, and connecting channel 2, so that the annular cavity forms a negative pressure. S3.3 The annular cavity generates adsorption force through the upper through hole to fix the energy storage steel billet; at the same time, the negative pressure connects the feed port and the reserved port through the lower through hole to suck out the scrap steel sheet generated by punching. S4. Ultrasonic-assisted pressure-holding shaping: S4.1 The equipment maintains the pressure state for 1-3 seconds to hold the pressure; during this process, the sliding sleeve is compressed, and the hydraulic oil inside flows into cavity one and cavity two of the central pressure plate through the built-in pipeline; S4.2 The hydraulic pressure in the cavity increases, pushing the vibrating plate downwards to fit tightly against the surface of the energy storage steel billet. S4.3. Restart the ultrasonic vibration assembly to apply high-frequency, low-amplitude vibration to the workpiece through the vibrating pressure plate; S5. Reset, waste collection and finished product transfer: S5.1 After the pressure holding process is completed, the hydraulic cylinder drives the upper template and the central pressure plate to move upward and reset, the reset spring returns to its original position, and the vacuum pump stops working simultaneously. S5.2 The top discharge valve of the machine frame is opened, and the scrap steel sheets sucked out through the discharge port are collected and processed in a unified manner.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention incorporates an ultrasonic vibrating head during the bending stage, and transmits high-frequency vibrations to the bending plate via a vibrating plate and hydraulic medium. While the mechanical bending force is applied, high-frequency dynamic stress disturbance is applied to the material, which can promote dislocation movement and plastic flow within the material, reduce local deformation resistance, and make the strain distribution in the bending area more uniform. This effectively reduces the bending forming force, minimizes forming springback, and reduces stress concentration and crack formation risk at the bending point, thereby improving the forming quality of the energy storage steel bar.

[0016] 2. This invention utilizes the pressure transmission effect of hydraulic oil in the sliding sleeve to automatically drive the vibrating pressure plate to fit against the workpiece surface during the pressure holding stage. It also combines ultrasonic vibration to perform high-frequency, low-amplitude vibration treatment on the workpiece, so that the workpiece can achieve residual stress release, stress redistribution, and microstructure stabilization under the pressure holding state. This can further reduce springback, improve dimensional accuracy and forming stability, and at the same time help improve the fatigue performance and reliability of the forming area.

[0017] 3. By setting an annular cavity, a vacuum suction structure, and a waste discharge channel inside the lower template, the present invention can automatically form a negative pressure adsorption after stamping, which can stably position the energy storage steel billet and avoid minor displacement during subsequent vibration. At the same time, the negative pressure airflow can be used to suck out and collect the punching waste in time, which can effectively avoid waste retention and jamming, and improve the stability and automation of continuous operation of the equipment.

[0018] 4. This invention improves processing efficiency while taking into account forming accuracy, dimensional stability and product quality through the synergistic combination of ultrasonic-assisted bending, ultrasonic pressure holding and shaping and negative pressure positioning and waste removal technologies. It is particularly suitable for mass production scenarios of energy storage steel bars with high requirements for hole position accuracy, bending accuracy and long-term service reliability. Attached Figure Description

[0019] Figure 1 This is a frontal three-dimensional structural schematic diagram of the stamping integrated equipment and method for energy storage steel bars according to the present invention; Figure 2 This is a partial structural diagram of the pump compartment of the stamping integrated equipment and method for energy storage steel bars according to the present invention; Figure 3 This is a partial structural diagram of the workbench of the stamping integrated equipment and method for energy storage steel bars according to the present invention; Figure 4 This is a partial structural diagram of the material outlet of the stamping integrated equipment and method for energy storage steel bars according to the present invention; Figure 5 This is a partial structural diagram of the lower template of the stamping integrated equipment and method for energy storage steel bars according to the present invention; Figure 6 This is a partial structural diagram of a vibrating plate in the stamping integrated equipment and method for energy storage steel bars of the present invention; Figure 7 This is a partial structural diagram of the inner cavity of the stamping integrated equipment and method for energy storage steel bars according to the present invention. Figure 8 This is a partial structural diagram of the cavity two of the stamping integrated equipment and method for energy storage steel bars according to the present invention; Figure 9 This is a partial structural diagram of the annular cavity of the stamping integrated equipment and method for energy storage steel bars according to the present invention; Figure 10 This is a bottom view of the structure of the central pressure plate in the stamping integrated equipment and method for energy storage steel bars according to the present invention.

[0020] 101. Frame; 102. Workbench; 103. Control Panel; 104. Discharge Platform; 105. Feed Roller; 106. Upper Template; 107. Hydraulic Cylinder; 108. Positioning Sleeve; 109. Return Spring; 110. Positioning Column; 111. Energy Storage Steel Billet Dispenser; 112. Lower Template; 113. Air Extraction Pipe; 114. Pump Chamber; 115. Fixing Frame; 116. Base Plate; 117. Sliding Sleeve; 118. Stamping Block; 119. Central Pressure Plate; 120. Mounting Plate; 121. 122. Vibrating pressure plate; 123. Flexible connecting strip; 124. Infrared sensor; 125. Lower through hole; 126. Reserved opening; 127. Feed port; 128. Guide post; 129. Annular cavity; 130. Vibrating plate two; 131. Vibrating plate one; 132. Connecting channel one; 133. Inner cavity two; 134. Ultrasonic vibrating head; 135. Cavity one; 136. Cavity two; 137. Upper through hole; 138. Connecting pipe; 139. Connecting channel two; 140. Inner cavity one; 140. Bending plate. Detailed Implementation

[0021] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0022] like Figures 1-10 The illustrated integrated stamping equipment for energy storage steel bars includes a frame 101. A workbench 102 is fixedly connected to the top of the frame 101. A base plate 116 is installed at the center of the top of the workbench 102. A lower template 112 is installed at the center of the top of the base plate 116. A fixing frame 115 is installed on the rear side of the workbench 102. A hydraulic cylinder 107 is fixedly connected to the upper front end of the fixing frame 115. A mounting plate 120 is fixedly connected to the bottom telescopic end of the hydraulic cylinder 107. An upper template 106 is bolted to the bottom of the mounting plate 120. A cutter is provided on the side of the stamping block 118 away from the bending plate 140. Guide posts 127 are slidably connected through the bottom of the upper template 106. A central pressure plate 119 is fixedly connected to the bottom of each guide post 127. A feeding roller 105 is installed on one side of the workbench 102, and a discharge platform 104 is installed on the other side of the workbench 102. A multi-axis robot is installed on one side of the rear of the workbench 102. The multi-axis robot is used for unloading the energy storage steel billet 111. A control panel 103 is installed on one side of the front end of the frame 101. The control panel 103 is used to control the other electrical control equipment. Positioning sleeves 108 are installed at the four corners of the central pressure plate 119 and the upper template 106. Positioning posts 110 are installed at the top corner of the bottom plate 116. The positioning posts 110 correspond to the positioning sleeves 108 and are slidably connected to the positioning sleeves 108. Return springs 109 are sleeved on the outer periphery of the guide posts 127. The return springs 109 are all located between the upper template 106 and the central pressure plate 119. Furthermore, in specific implementation, the energy storage steel billet 111 can be stamped and formed using a stamping forming machine. During operation, the operator guides the steel strip between the feed rollers 105, which then guide the strip to the space between the lower die 112 and the central pressure plate 119. At this point, the hydraulic cylinder 107 starts working, causing its bottom extension end to lower the mounting plate 120, which in turn lowers the upper die 106 at the bottom of the mounting plate 120. The positioning sleeve 108 and positioning column 110 guide the upper die 106 and the central pressure plate 119 during this process, achieving precise positioning between the upper die 106, the central pressure plate 119, and the lower die 112. In specific operation, when the upper die 106 and the central pressure plate 119 are pressed down, the central pressure plate 11... 9 will first contact the steel strip to limit its movement. Then, the upper template 106 continues to press down, compressing the return spring 109. The stamping block 118 and bending plate 140 at the bottom of the upper template 106 will slide relative to the central pressure plate 119, allowing the stamping block 118 and bending plate 140 to continue pressing down with the upper template 106. The bending plate 140 can bend the end of the steel strip. Then, the stamping block 118 can cooperate with the reserved opening 125 on the lower template 112 to punch holes in the steel strip and cut it with a cutter installed on one side. After that, the central pressure plate 119 and the upper template 106 can hold the strip for 1-3 seconds to maintain pressure and shape it. After processing, the multi-axis robot can remove the processed energy storage steel billet 111 and export it to the collection box through the discharge table 104.

[0023] Among them, the central pressure plate 119 and the upper template 106 are fixedly connected at the front and rear with sliding sleeves 117, and the sliding sleeves 117 are filled with hydraulic oil. The bottom of the upper template 106 is fixedly connected with multiple stamping blocks 118 and bending plates 140. The central pressure plate 119 and the lower template 112 are both provided with reserved openings 125 corresponding to the stamping blocks 118. The upper template 106 is provided with an inner cavity 132 in the middle. Both sides of the inner cavity 132 are connected with a connecting channel 131. The end of the connecting channel 131 away from the inner cavity 132 is connected to The passage has an inner cavity 139, the bottom of which is connected to the inside of the sliding sleeve 117. The passage 131 and the inner cavity 132 are both filled with hydraulic oil. Multiple ultrasonic vibrating heads 133 are installed in the upper part of the inner cavity 132. Vibrating plates 130 are provided in the lower part of the ultrasonic vibrating heads 133. Multiple vibrating plates 129 are fixedly connected to the bottom of the vibrating plates 130. The vibrating plates 129 are respectively provided in the stamping block 118 and the bending plate 140. The interiors of the stamping block 118 and the bending plate 140 are connected to the inner cavity 132. Furthermore, in specific implementation, when the bending plate 140 is bent, the ultrasonic vibrating head 133 in the inner cavity 132 will start working. The operation of the ultrasonic vibrating head 133 can generate high-frequency vibration, which can be transmitted to the vibrating plate 129 that is attached to it. The vibrating plate 129 can use the hydraulic oil around its periphery to transmit the vibration to the bending plate 140. The high-frequency vibration of the bending plate 140 during bending can apply a dynamic stress disturbance field to the steel strip in the plastic flow stage. The introduction of periodic dynamic stress disturbance on the basis of static bending pressure makes the dislocation movement inside the steel strip easier to activate, thereby reducing the local equivalent yield stress, promoting more uniform plastic deformation, and weakening the strain gradient between the inner and outer layers of the bending area, reducing the accumulation of residual tensile stress. Therefore, it can effectively reduce the bending forming force, reduce the springback, and improve the stress concentration and crack tendency at the bending fillet. After the bending is completed, the ultrasonic vibrating head 133 stops working.

[0024] The central pressure plate 119 has a cavity 135 in the middle, and cavities 134 are connected to both sides of the cavity 135. The cavities 134 are located on the front and rear sides of the central pressure plate 119. The top of the cavities 134 are connected to the inside of the sliding sleeve 117. Both the cavity 135 and the cavity 134 are filled with hydraulic oil. The bottom of the cavity 135 is provided with a vibrating pressure plate 121. A small ultrasonic vibrating head is installed inside the cavity 135. The inner and outer peripheries of the vibrating pressure plate 121 are fixedly connected to the central pressure plate 119 by a flexible connecting strip 122. The flexible connecting strip 122 can be made of rubber or silicone. Furthermore, in specific implementation, during the pressure holding stage, the small ultrasonic vibrating heads inside the ultrasonic vibrating head 133 and cavity 135 start working again. At this time, due to the reduced distance between the central pressure plate 119 and the upper template 106, the sliding sleeve 117 is compressed, causing the hydraulic oil inside the sliding sleeve 117 to enter the cavity 134. When the hydraulic oil enters the cavity 134, it forces the original hydraulic oil in the cavity 134 into the cavity 135, increasing the pressure inside the cavity 135. The inflowing hydraulic oil increases the pressure applied to the vibrating pressure plate 121, causing the flexible connecting strip 122 around the vibrating pressure plate 121 to deform under pressure, causing the vibrating pressure plate 121 to descend and directly contact the steel strip surface. At this time, the small ultrasonic vibrating head inside the cavity 135 starts working, through the small ultrasonic vibrating head The operation can generate high-frequency, low-amplitude vibrations, and the high-frequency vibration waves can be transmitted to the vibrating pressure plate 121 through hydraulic oil. The vibrating pressure plate 121 can realize high-frequency, low-amplitude vibration of the energy storage steel billet 111 during the pressure holding stage, reduce the instantaneous forming resistance, thereby effectively reducing material springback, making the stress distribution more uniform, reducing the initiation of local cracks, and achieving auxiliary pressure holding and stable forming. It can perform stress redistribution and structural stabilization treatment on materials that have entered the plastic or elastoplastic state, introduce micro-dynamic disturbances under constant external load, so that local high residual stress areas undergo continuous micro-relaxation and dislocation rearrangement, thereby reducing the residual stress peak and promoting stress uniformity. At the same time, it can enhance the dense contact and mold adhesion of the material to a certain extent, reduce the springback release caused by elastic recovery, thus improving the stability of forming dimensions, reducing the subsequent springback, and improving the long-term fatigue performance of the bending or stamping forming area.

[0025] The lower template 112 has an annular cavity 128 in the middle, with evenly distributed upper through holes 136 at the top and evenly distributed lower through holes 124 at the bottom. Both the upper through holes 136 and the lower through holes 124 penetrate the lower template 112. Two connecting channels 138 are provided on both sides of the rear part of the lower template 112. A pump chamber 114 is installed in the middle of the front side of the fixing frame 115, and a vacuum pump is installed inside the pump chamber 114. The working end of the vacuum pump is fixedly connected to the ground. There is an air extraction pipe 113, and the end of the air extraction pipe 113 is fixedly connected to a connecting pipe 137. The ends of the connecting pipe 137 are all fixedly installed inside the second connecting channel 138. The second connecting channel 138 is used to connect the annular cavity 128 and the connecting pipe 137. An infrared sensor 123 is installed on the upper front side of the pump chamber 114. A discharge valve is provided on the top of the frame 101. A discharge port 126 is opened in the middle of the lower template 112. The inside of the frame 101 is connected to the inside of the discharge port 126 through the discharge valve. Furthermore, in specific implementation, during the stamping stage, when the upper template 106 descends to the bottom, the infrared sensor 123 can detect the upper template 106. At this time, the vacuum pump inside the pump chamber 114 will start working. The operation of the vacuum pump can use the air extraction pipe 113 and the connecting channel 138 to extract the air inside the annular cavity 128, making the annular cavity 128 a negative pressure state. Through the connection of the upper through hole 136, the negative pressure can be used to adsorb and position the upper steel strip, avoiding the vibration of the steel strip during the subsequent holding pressure stage. At the same time, the lower through hole 124 can connect the annular cavity 128 and the discharge port 126, so that the continuous suction force can be connected to the reserved port 125, thereby sucking out the stamped steel sheet from the reserved port 125, avoiding material jamming that affects the subsequent stamping work. Afterwards, the discharge valve at the top of the frame 101 is opened, and the stamped steel sheet will enter the collection bin in the frame 101 through the discharge valve for convenient subsequent centralized processing.

[0026] One method of using an integrated stamping equipment for energy storage steel bars includes the following steps: S1. Equipment preparation and loading: S1.1 Start the machine using the control panel 103, and check the operating status of components such as the hydraulic cylinder 107, ultrasonic vibrating head 133, vacuum pump in pump chamber 114, infrared sensor 123, and multi-axis manipulator in sequence to confirm that there are no abnormalities in the equipment. S1.2 Place the energy storage steel strip on the feed roller 105, and the feed roller 105 conveys the steel strip to accurately send the energy storage steel billet 111 to the processing station between the lower template 112 and the central pressure plate 119. S2. Pressing, positioning, and bending operations: S2.1, The hydraulic cylinder 107 drives the bottom telescopic end to move the mounting plate 120 and the upper template 106 downward as a whole. Relying on the sliding cooperation between the positioning sleeve 108 and the positioning column 110, the upper template 106, the middle pressure plate 119, and the lower template 112 are precisely aligned. S2.2 During the downward movement, the central pressure plate 119 first contacts the energy storage steel billet 111 to complete the pre-tightening limit of the workpiece; the upper template 106 continues to press down, compressing the reset spring 109, and the stamping block 118 and bending plate 140 pass through the reserved opening 125 of the central pressure plate 119 to contact the workpiece. S2.3 Start the ultrasonic vibrating head 133 in the inner cavity 132. The vibration is transmitted sequentially through the vibrating plate 130 and the vibrating plate 129, and is transmitted to the bending plate 140 in conjunction with the hydraulic oil in the inner cavity. The mechanical pressure is used to complete the bending of the steel strip end. After the bending is completed, the ultrasonic vibrating head 133 temporarily stops working. S3. Punching operation and negative pressure fixed material discharge: S3.1, the upper template 106 continues to press down, and the stamping block 118 cooperates with the reserved opening 125 of the lower template 112 to complete the steel strip punching process; S3.2 After the infrared sensor 123 detects that the upper template 106 has reached the lower position, the vacuum pump inside the pump chamber 114 starts and extracts the air from the annular cavity 128 inside the lower template 112 through the air extraction pipe 113, the connecting pipe 137, and the connecting channel 138, so that the annular cavity 128 forms a negative pressure. S3.3, the annular cavity 128 generates an adsorption force through the upper through hole 136 to firmly fix the energy storage steel billet 111 and prevent displacement due to subsequent vibration; at the same time, the negative pressure connects the discharge port 126 and the reserved port 125 through the lower through hole 124 to suck out the scrap steel sheet generated by punching and avoid material jamming. S4. Ultrasonic-assisted pressure-holding shaping: S4.1 The equipment maintains the pressure state for 1-3 seconds to hold the pressure; during this process, the sliding sleeve 117 is compressed, and the hydraulic oil inside flows into the cavity 134 and cavity 135 of the central pressure plate 119 through the built-in pipeline. S4.2, the hydraulic pressure in cavity 135 increases, pushing the vibrating plate 121 to overcome the resistance of the flexible connecting strip 122 and move downward, so as to fit tightly against the surface of the energy storage steel billet 111; S4.3. Restart the ultrasonic vibration assembly and apply high-frequency, low-amplitude vibration to the workpiece through the vibration plate 121 to release residual stress in the workpiece, optimize the internal dislocation arrangement, reduce molding springback, and improve dimensional stability. S5. Reset, waste collection and finished product transfer: S5.1 After the pressure holding process is completed, the hydraulic cylinder 107 drives the upper template 106 and the central pressure plate 119 to move upward and reset, the reset spring 109 returns to its original position, and the vacuum pump stops working synchronously. S5.2, The top discharge valve of the frame 101 is opened, and the scrap steel sheets sucked out through the discharge port 126 are collected and processed in a unified manner; S5.3 The multi-axis robot arm on the rear side of the workbench 102 grabs the finished energy storage steel bar and transfers it to the discharge table 104. The discharge table 104 then transports it to the collection area, and the single processing flow ends.

[0027] Working principle: In practical use, the stamping forming machine can achieve the stamping forming of the energy storage steel billet 111. Specifically, the operator guides the steel strip between the feed rollers 105, which then guide the steel strip to the space between the lower die 112 and the central pressure plate 119. At this time, the hydraulic cylinder 107 starts working, causing the bottom extension end of the hydraulic cylinder 107 to drive the mounting plate 120 down, thereby causing the upper die 106 at the bottom of the mounting plate 120 to descend synchronously. The positioning sleeve 108 and positioning column 110 guide the upper die 106 and the central pressure plate 119 during this process, achieving precise positioning between the upper die 106, the central pressure plate 119, and the lower die 112. In specific operation, when the upper die... When plate 106 and the central pressure plate 119 press down, the central pressure plate 119 first contacts the steel strip, limiting its movement. Then, the upper template 106 continues to press down, compressing the return spring 109. The stamping block 118 and bending plate 140 at the bottom of the upper template 106 slide relative to the central pressure plate 119, causing them to continue pressing down with the upper template 106. The bending plate 140 bends the end of the steel strip. During bending, the ultrasonic vibrating head 133 in the inner cavity 132 starts working, generating high-frequency vibrations that are transmitted to the vibrating plate 129 that is attached to it. The vibrating plate 129 then... The vibration is transmitted to the bending plate 140 using the hydraulic oil around the periphery. The high-frequency vibration of the bending plate 140 during bending applies a dynamic stress disturbance field to the steel strip during the plastic flow stage. Introducing periodic dynamic stress disturbance on top of the static bending pressure makes it easier to activate dislocation movement within the steel strip, thereby reducing the local equivalent yield stress, promoting more uniform plastic deformation, and weakening the strain gradient between the inner and outer layers of the bending zone, reducing the accumulation of residual tensile stress. Therefore, it can effectively reduce the bending forming force, decrease springback, and improve stress concentration and crack tendency at the bending fillet. After bending, the ultrasonic vibrator 133 stops working, and the punching block 118 can cooperate with the pre-reserved opening 125 on the lower template 112 to achieve the punching operation of the steel strip. Afterwards, the pressure plate 119 and the upper template 106 can hold the pressure for 1-3 seconds for shaping. Further, during the pressure holding stage, the ultrasonic vibrating head 133 and the small ultrasonic vibrating head inside the second cavity 135 start working again. At this time, due to the reduced distance between the central pressure plate 119 and the upper template 106, the sliding sleeve 117 is compressed, causing the hydraulic oil inside the sliding sleeve 117 to enter the first cavity 134. When the hydraulic oil enters the first cavity 134, it forces the existing hydraulic oil in the first cavity 134 into the second cavity 135, increasing the pressure inside the second cavity 135. The flowing hydraulic oil increases the pressure applied to the vibrating pressure plate 121, causing the flexible connecting strip 122 around the vibrating pressure plate 121 to be subjected to pressure.The flexible connecting strip 122 undergoes flexible deformation, causing the vibrating pressure plate 121 to descend and directly contact the steel strip surface. At this time, the small ultrasonic vibrating head inside the cavity 135 starts to work. The operation of the small ultrasonic vibrating head generates high-frequency, low-amplitude vibrations, which can be transmitted to the vibrating pressure plate 121 through hydraulic oil. The vibrating pressure plate 121 enables high-frequency, low-amplitude vibration of the energy storage steel billet 111 during the pressure holding stage, reducing instantaneous forming resistance and effectively reducing material springback. This results in a more uniform stress distribution, reduces the initiation of local cracks, and achieves auxiliary pressure holding for stable forming. It also performs stress redistribution and structural stabilization treatment on materials that have entered a plastic or elastoplastic state. Under constant external load, micro-dynamic disturbances are introduced, causing continuous micro-relaxation and dislocation rearrangement in local high residual stress areas, thereby reducing residual stress peaks and promoting stress homogenization. At the same time, it enhances the dense contact and mold-fitting properties of the material to a certain extent, reducing springback caused by elastic recovery. The springback release improves the stability of the forming dimensions, reduces subsequent springback, and enhances the long-term fatigue performance of the bending or stamping forming area. In actual use, during the stamping stage, when the upper die 106 descends to the bottom, the infrared sensor 123 detects the upper die 106. At this time, the vacuum pump inside the pump chamber 114 starts working. The vacuum pump uses the suction pipe 113 and the connecting channel 138 to extract air from the annular cavity 128, creating a negative pressure state inside the annular cavity 128. Through the upper through hole 136, the negative pressure is used to adsorb and position the upper steel strip, preventing slight displacement of the steel strip due to vibration during the subsequent holding pressure stage. At the same time, through the lower through hole 124, the annular cavity 128 is connected to the discharge port 126, allowing continuous suction force to act on the reserved opening 125, thereby sucking out the stamped steel sheet from the reserved opening 125, preventing material jamming that could affect subsequent stamping operations, which is beneficial for practical use.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A stamping and forming equipment for energy storage steel bars, comprising a frame (101), characterized in that: A workbench (102) is fixedly connected to the top of the frame (101). A base plate (116) is installed at the middle of the top of the workbench (102). A lower template (112) is installed at the middle of the top of the base plate (116). A fixing frame (115) is installed on the rear side of the workbench (102). A hydraulic cylinder (107) is fixedly connected to the upper front end of the fixing frame (115). A mounting plate (120) is fixedly connected to the bottom telescopic end of the hydraulic cylinder (107). An upper template (102) is bolted to the bottom of the mounting plate (120). 6) The bottom of the upper template (106) is slidably connected to guide posts (127), and the bottom of the guide posts (127) is fixedly connected to a central pressure plate (119). The central pressure plate (119) and the upper template (106) are fixedly connected to each other at the front and rear ends by sliding sleeves (117). The sliding sleeves (117) are filled with hydraulic oil. The bottom of the upper template (106) is fixedly connected to multiple stamping blocks (118) and bending plates (140). The side of the stamping blocks (118) away from the bending plates (140) A cutting blade is provided. The middle pressure plate (119) and the lower template (112) both have pre-reserved openings (125) corresponding to the stamping block (118) in their middle portions. The upper template (106) has an inner cavity two (132) in its middle portion. Both sides of the inner cavity two (132) are connected to a connecting channel one (131). The end of the connecting channel one (131) away from the inner cavity two (132) is connected to an inner cavity one (139). The bottom of the inner cavity one (139) is connected to the inside of the sliding sleeve (117). The connecting channel one (139)... Both 131) and the inner cavity 2 (132) are filled with hydraulic oil. Multiple ultrasonic vibrating heads (133) are installed in the upper part of the inner cavity 2 (132). A vibrating plate 1 (130) is provided in the lower part of the ultrasonic vibrating head (133). Multiple vibrating plates 2 (129) are fixedly connected to the bottom of the vibrating plate 1 (130). The vibrating plates 2 (129) are respectively arranged in the stamping block (118) and the bending plate (140). The interior of the stamping block (118) and the bending plate (140) are connected to the inner cavity 2 (132).

2. The stamping integrated equipment for energy storage steel bars according to claim 1, characterized in that: A feed roller (105) is installed on one side of the workbench (102), and a discharge platform (104) is installed on the other side of the workbench (102). A multi-axis robot is provided on one side of the rear of the workbench (102), and the multi-axis robot is used for unloading the energy storage steel billet (111).

3. The stamping integrated equipment for energy storage steel bars according to claim 1, characterized in that: A control panel (103) is installed on one side of the upper front end of the frame (101), and the control panel (103) is used to control the other electrical control equipment.

4. The stamping integrated equipment for energy storage steel bars according to claim 1, characterized in that: The central pressure plate (119) and the upper template (106) are each equipped with a positioning sleeve (108) at their four corners, and the bottom plate (116) is equipped with a positioning post (110) at its top corner. The positioning post (110) corresponds to the positioning sleeve (108) and is slidably connected to the positioning sleeve (108).

5. The stamping integrated equipment for energy storage steel bars according to claim 1, characterized in that: The top of the frame (101) is provided with a feeding valve, and the middle of the lower template (112) is provided with a feeding port (126). The inside of the frame (101) is connected to the inside of the feeding port (126) through the feeding valve.

6. The stamping integrated equipment for energy storage steel bars according to claim 1, characterized in that: Each guide post (127) is fitted with a reset spring (109) on its outer periphery. The reset spring (109) is located between the upper template (106) and the central pressure plate (119).

7. The stamping integrated equipment for energy storage steel bars according to claim 1, characterized in that: The central pressure plate (119) has a cavity two (135) in the middle. Both sides of the cavity two (135) are connected to the cavity one (134). The cavities one (134) are located on the front and rear sides of the central pressure plate (119). The top of the cavities one (134) is connected to the inside of the sliding sleeve (117). The cavities two (135) and one (134) are filled with hydraulic oil. The bottom of the cavity two (135) is provided with a vibration pressure plate (121). A small ultrasonic vibration head is installed inside the cavity two (135). The inner and outer peripheries of the vibration pressure plate (121) are fixedly connected to the central pressure plate (119) through a flexible connecting strip (122).

8. The stamping integrated equipment for energy storage steel bars according to claim 1, characterized in that: The lower template (112) has an annular cavity (128) in the middle, and an upper through hole (136) is evenly distributed in the upper part of the annular cavity (128). The lower through hole (124) is evenly distributed in the bottom part of the annular cavity (128). The upper through hole (136) and the lower through hole (124) both penetrate the lower template (112). The lower template (112) has connecting channels (138) on both sides of the rear part.

9. The stamping integrated equipment for energy storage steel bars according to claim 1, characterized in that: A pump chamber (114) is installed in the middle of the front side of the fixed frame (115). A vacuum pump is installed inside the pump chamber (114). The working end of the vacuum pump is fixedly connected to the suction pipe (113). The end of the suction pipe (113) is fixedly connected to the connecting pipe (137). The ends of the connecting pipe (137) are all fixedly installed inside the connecting channel two (138). The connecting channel two (138) is used to connect the annular cavity (128) and the connecting pipe (137). An infrared sensor (123) is installed on the upper front side of the pump chamber (114).

10. A method of using an integrated stamping equipment for energy storage steel bars, applied to the integrated stamping equipment for energy storage steel bars as described in any one of claims 1-9, characterized in that: Includes the following steps: S1. Equipment preparation and loading: S1.1 Start the machine by operating the control panel (103), and check the operating status of the hydraulic cylinder (107), ultrasonic vibrating head (133), vacuum pump in pump chamber (114), infrared sensor (123), and multi-axis manipulator components in sequence to confirm that there are no abnormalities in the equipment; S1.2 Place the energy storage steel strip on the feed roller (105), and the feed roller (105) will transport the steel strip to accurately send the energy storage steel billet (111) to the processing station between the lower template (112) and the central pressure plate (119); S2. Pressing, positioning, and bending operations: S2.1 The hydraulic cylinder (107) drives the bottom telescopic end to move the mounting plate (120) and the upper template (106) downward as a whole. Relying on the sliding cooperation between the positioning sleeve (108) and the positioning column (110), the upper template (106), the middle pressure plate (119), and the lower template (112) are precisely aligned. S2.2 During the downward movement, the central pressure plate (119) first contacts the energy storage steel billet (111) to complete the pre-tightening limit of the workpiece; the upper template (106) continues to press down, compressing the reset spring (109), and the stamping block (118) and bending plate (140) pass through the reserved opening (125) of the central pressure plate (119) to contact the workpiece; S2.3 Start the ultrasonic vibrating head (133) in the inner cavity two (132). The vibration is transmitted to the bending plate (140) in sequence through the vibrating plate one (130) and the vibrating plate two (129), in conjunction with the hydraulic oil in the inner cavity. After bending is completed, the ultrasonic vibrating head (133) temporarily stops working. S3. Punching operation and negative pressure fixed material discharge: S3.1, The upper template (106) continues to press down, and the punching block (118) cooperates with the reserved opening (125) of the lower template (112) to complete the steel strip punching process; S3.2 After the infrared sensor (123) detects that the upper template (106) has reached the lower position, the vacuum pump inside the pump chamber (114) starts and extracts the air from the inner annular cavity (128) of the lower template (112) through the air extraction pipe (113), the connecting pipe (137), and the second connecting channel (138), so that the annular cavity (128) forms a negative pressure. S3.3, the annular cavity (128) generates an adsorption force through the upper through hole (136) to fix the energy storage steel billet (111); at the same time, the negative pressure connects the discharge port (126) and the reserved port (125) through the lower through hole (124) to suck out the scrap steel sheet generated by punching; S4. Ultrasonic-assisted pressure-holding shaping: S4.1 The equipment maintains the pressure state for 1-3 seconds to hold the pressure; during this process, the sliding sleeve (117) is compressed, and the hydraulic oil inside flows into the cavity one (134) and cavity two (135) of the central pressure plate (119) through the built-in pipeline. S4.2, The oil pressure in cavity two (135) increases, pushing the vibrating plate (121) to move down and closely fit the surface of the energy storage steel billet (111); S4.

3. Restart the ultrasonic vibration assembly and apply high-frequency, low-amplitude vibration to the workpiece through the vibration plate (121); S5. Reset, waste collection and finished product transfer: S5.1 After the pressure holding process is completed, the hydraulic cylinder (107) drives the upper template (106) and the central pressure plate (119) to move upward and reset, the reset spring (109) returns to its original position, and the vacuum pump stops working synchronously. S5.

2. The top discharge valve of the frame (101) is opened, and the scrap steel sheets sucked out through the discharge port (126) are collected and processed in a unified manner.

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