An oil hydraulic press

Abstract

The application relates to the technical field of hydraulic machines, in particular to an oil hydraulic press, which comprises a liquid filling mechanism and a hydraulic mechanism connected with the liquid filling mechanism; the hydraulic mechanism comprises a main oil cylinder, a base, a top beam and a movable plate installed between the base and the top beam; a plurality of guide columns are installed between the base and the top beam, the movable plate is reciprocatingly installed on the plurality of guide columns, one end of the movable plate close to the base is further provided with a telescopic rod body, and the telescopic rod body is used for assisting the movable plate in reciprocating movement between the base and the top beam; the main oil cylinder is installed below the base; the guide column is a cavity structure and is communicated with the main oil cylinder; the liquid filling mechanism is used for rapidly filling liquid into the main oil cylinder; after the main oil cylinder is filled with liquid, the pressure in the guide column rapidly rises; and the pressure rising in the guide column drives the movable plate to move close to the top beam to compress and process a product to be processed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic machines, and discloses an oil hydraulic press. BACKGROUND

[0002] The oil hydraulic press is an important industrial equipment, which is used for high-precision compression processing operation on materials. The traditional press design has some disadvantages. For example, the upper cylinder lower pressing structure of the traditional oil hydraulic press has low structure utilization rate, the main oil cylinder is arranged on the upper side and occupies space, and there is a safety hazard of piston sliding; the traditional oil hydraulic press has a slow work feeding stage, and the work feeding time generally accounts for half of the product forming cycle time, so the production efficiency of the traditional oil hydraulic press is low for users with high requirements on the production efficiency of the oil machine; and the whole machine structure of the traditional oil hydraulic press is in a separated state, and the structure arrangement in the separated state occupies more space, which is not friendly to the utilization rate of the user site. SUMMARY

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present application is to provide an oil hydraulic press.

[0004] In order to achieve the above-mentioned purpose, the oil hydraulic press of the present application comprises a liquid filling mechanism and a hydraulic mechanism used in cooperation with the liquid filling mechanism. The hydraulic mechanism comprises a main oil cylinder, a base, a top beam and a movable plate installed between the base and the top beam. A plurality of guide columns are installed between the base and the top beam, and the movable plate is reciprocally installed on the plurality of guide columns. An end of the movable plate close to the base is further provided with an extension rod body, which is used to assist the movable plate to reciprocally move between the base and the top beam. The main oil cylinder is installed below the base. The guide column is a hollow structure and is in communication with the main oil cylinder. The liquid filling mechanism is used to fill liquid into the main oil cylinder. After the main oil cylinder is filled with liquid, the pressure in the guide column rises rapidly. The pressure rise in the guide column drives the movable plate to move close to the top beam to perform compression processing operation on the product to be processed. After the processing is completed, the liquid filling mechanism stops filling liquid and releases pressure to flow back. The pressure in the main oil cylinder and the guide column cavity gradually releases, and the movable plate returns to the initial position under the assistance of the extension rod body to perform the next processing operation.

[0005] Through the cooperation of the liquid filling mechanism and the hydraulic mechanism, rapid liquid filling is realized to drive the movable plate to perform efficient compression processing. At the same time, the extension rod body is used to assist the movable plate to stably reset, so as to improve the processing precision and efficiency. In specific implementation, the liquid filling mechanism rapidly fills liquid into the main oil cylinder. The cavity pressure of the main oil cylinder rises and is transmitted to the guide column of the hollow structure, so as to drive the movable plate to move towards the top beam to perform product compression processing. After the processing is completed, the liquid filling mechanism stops filling liquid and starts pressure release to flow back. The pressure in the main oil cylinder and the guide column releases, and the extension rod body assists the movable plate to stably return to the initial position to prepare for the next processing.

[0006] The main oil cylinder of the oil press is arranged below, and stamping work is performed from bottom to top, which has the advantages that: first, the height of the machine body can be reduced, the distance from the main oil tank can be shortened, the floor space can be reduced, and the response speed of the oil circuit can be improved; second, the safety hazard caused by the downward sliding of the piston due to gravity can be avoided.

[0007] The oil press further comprises a jacking mechanism arranged on the base, the jacking mechanism comprising a driving member, a jacking rod body connected to the output end of the driving member, and the base and the movable plate each being provided with a jacking hole in communication; the driving member drives the jacking rod body to reciprocate in the jacking holes on the base and the movable plate, and the processed product placed on the movable plate is jacked out of the movable plate.

[0008] In the processing stage, the liquid filling mechanism rapidly fills the main oil cylinder with liquid, and pushes the movable plate to move stably along the guide column to the top beam to implement accurate compression processing on the workpiece placed on the movable plate. After the processing is completed, the liquid filling mechanism stops filling liquid and starts the pressure relief process, and the movable plate is reset stably under the auxiliary action of the telescopic rod body. The jacking mechanism added to the press can automatically jack the workpiece off the movable plate after the processing is completed, which facilitates the taking out of the workpiece and the placement of a new workpiece, greatly simplifies the manual operation process, reduces manual intervention, and improves the operation safety and continuity. This design not only ensures the processing accuracy and efficiency, but also brings users a more convenient and efficient production experience through high automation and intelligence.

[0009] The oil press further comprises a sub-cylinder body installed in the main oil cylinder, the volume of the sub-cylinder body being smaller than that of the main oil cylinder, and the sub-cylinder body being used to rapidly push the movable plate upward in the initial stage; the sub-cylinder body is in communication with the main oil cylinder through a hydraulic pipeline, and the sub-cylinder body is in communication with the guide column; the liquid filling mechanism outputs hydraulic oil to the sub-cylinder body, the sub-cylinder body is lifted by hydraulic pressure to drive the pressure in the guide column to rise, and the pressure in the guide column cavity drives the movable plate to move closer to the top beam to perform compression processing on the product to be processed.

[0010] The liquid filling mechanism further comprises a back pressure valve group, the sub-cylinder body is provided with a control valve in communication with the back pressure valve group, the liquid filling mechanism fills the sub-cylinder body with liquid, when the pressure in the sub-cylinder body cavity rises to the pressure value set by the back pressure valve group, the control valve of the sub-cylinder body is opened, the hydraulic oil is filled into the main oil cylinder from the sub-cylinder body and the sub-cylinder body filling channel is closed, and the pressure in the main oil cylinder cavity rises rapidly to drive the movable plate to move closer to the top beam to perform compression processing on the product to be processed.

[0011] The hydraulic system of the oil press innovatively uses a logic back pressure valve group as a main cylinder pressure switch. Inside the main cylinder body, there is a secondary cylinder body. When the liquid filling mechanism outputs hydraulic oil to the secondary cylinder body, the movable plate is pushed to quickly move upwards. When the pressure in the secondary cylinder body cavity rises to the set pressure of the logic back pressure valve group, the control valve opens, the main oil cylinder starts to quickly fill with liquid, and the secondary cylinder body channel is closed. The main oil cylinder then quickly increases in pressure. This pressure increasing method abandons the traditional slow work-in stage, significantly improving the production efficiency of the oil press, especially suitable for printing, embossing, and shallow stretching batch production processing technology.

[0012] The volume of the secondary cylinder body is smaller than that of the main oil cylinder. Because of the small volume of the secondary cylinder body, the liquid filling mechanism can fill it with enough hydraulic oil in a short time, causing the secondary cylinder body to quickly increase in pressure. This helps to quickly push the movable plate upwards at the initial stage of processing, starting the entire processing flow, thereby shortening the start-up time and improving production efficiency. When the pressure in the secondary cylinder body reaches the pre-set pressure value of the back pressure valve group, the control valve automatically opens, allowing hydraulic oil to flow from the secondary cylinder body to the main oil cylinder. This design ensures a smooth transition from the secondary cylinder body to the main oil cylinder, avoiding equipment impact and instability caused by instantaneous high pressure. At the same time, through the adjustment of the back pressure valve group, the pressure change during processing can be accurately controlled, further improving the processing accuracy. At the initial stage of processing, the use of a smaller volume secondary cylinder body for quick pressure increase and start-up can reduce unnecessary energy consumption. As the processing deepens, the main oil cylinder begins to dominate the processing process, and the secondary cylinder body has completed its operational tasks and no longer requires additional energy input. This design helps to achieve energy-saving and efficient production goals.

[0013] The bottom of the guide column cavity is provided with an elastic member, which is used to assist the movable plate to return to the initial position and prevent the movable plate from shaking or deviating due to pressure relief, thereby improving the processing accuracy.

[0014] During processing, the movable plate moves smoothly along the guide column under the drive of the hydraulic system, and precisely compresses the workpiece placed on it. When processing is completed, the liquid filling mechanism stops filling, and the system begins to release pressure. At this time, the elastic members (such as springs or elastic washers) at the bottom of the guide column cavity begin to play a role, assisting the movable plate to smoothly return to the initial position and effectively preventing shaking or deviation due to pressure relief. This design not only ensures the accurate positioning of the movable plate during processing, but also improves the processing accuracy and stability.

[0015] The oil press also includes a control center, which includes an emergency return device. A pressure sensor is provided on the hydraulic mechanism. When the pressure sensor detects abnormal pressure of the hydraulic mechanism or a fault in the equipment operation, the control center immediately starts the emergency return device, the movable plate stops the die closing action and returns to the initial position, and after returning to the initial position, the jacking mechanism completes the product ejection action of one processing and ends the oil press operation state.

[0016] During the processing, the pressure sensor on the hydraulic mechanism detects the pressure state of the system in real time. Once an abnormal pressure or equipment failure is detected, the control center responds immediately and starts the emergency return device. This device can quickly cut off the power source of the hydraulic system, stop the current mold closing action of the movable plate, and smoothly return to the initial position. This design effectively prevents equipment damage or personnel injury caused by failure, ensuring the safety of the processing process. After the movable plate returns to the initial position, the lifting mechanism automatically starts to lift the processed product off the movable plate, facilitating subsequent operations. At the same time, the control center sends a command to end the running state of the oil press, avoiding the device running in a failure state. This process ensures that even in the event of a failure, the device can quickly and safely stop running and be ready for troubleshooting or maintenance.

[0017] The control center also includes a two-hand button for starting and stopping the oil press, and a safety light barrier is installed on the hydraulic mechanism. When the safety light barrier is blocked, the safety light barrier sends an alarm signal and the movable plate stops moving. Pressing the two-hand button again allows the movable plate to continue working.

[0018] The design of the two-hand button requires the operator to press the button with both hands when starting or continuing the processing process, thereby avoiding the risk of misoperation caused by single-handed operation. This design effectively prevents accidental start caused by operator negligence or fatigue, improving the safety of the device. At the same time, the safety light barrier installed on the hydraulic mechanism serves as another safety line, which can immediately send an alarm signal when detecting an object (such as the operator's hand or other parts of the body) blocking. At this time, even if the operator has pressed the two-hand button, the movable plate will immediately stop moving, preventing pressure injury or collision accidents caused by accidental blocking. Only when the operator removes the blocking object and presses the two-hand button again can the movable plate continue to work. This design ensures the safety and reliability of the device during processing.

[0019] The oil press includes a temperature control system for real-time monitoring and adjusting the temperature of the hydraulic oil, avoiding equipment damage and processing precision decline caused by excessively high or low oil temperature.

[0020] The temperature control system includes a temperature monitoring module, a cooling device, and a heating device. Temperature sensors are installed in the hydraulic system to monitor the hydraulic oil temperature in real time. These sensors can be located in key areas such as the main cylinder, auxiliary cylinder, hydraulic lines, and oil tank. When the hydraulic oil temperature exceeds a set upper limit, the cooling device automatically activates. The cooling device can be an air-cooled radiator or a water-cooled heat exchanger, the specific choice depending on the equipment's operating environment and heat dissipation requirements. When the hydraulic oil temperature falls below a set lower limit, the heating device automatically activates. The heating device can be an electric heater or a heat exchanger, used to preheat the hydraulic oil in low-temperature environments.

[0021] The connection between the movable plate and the guide post is also provided with a sliding sleeve. The sliding sleeve is made of wear-resistant material. The sliding sleeve is used to reduce the friction between the movable plate and the guide post, reduce wear, ensure the stable reciprocating movement of the movable plate, and reduce noise and vibration during reciprocating movement.

[0022] The bottom of the hydraulic mechanism is also equipped with a vibration elimination device. The vibration elimination device is activated after the movable plate completes a compression operation and returns to the initial position. The vibration elimination device eliminates the residual stress between the movable plate and the guide column by generating a small vibration, thereby improving the accuracy and stability of the next processing.

[0023] The vibration damping device should be designed with a structure tightly connected to the bottom of the hydraulic mechanism to ensure stable vibration generation. The device should contain a vibration source (such as an electromagnetic vibrator or pneumatic vibrator) to control parameters such as vibration frequency, amplitude, and duration. The vibration parameters of the vibration damping device should be set appropriately according to the specific equipment and processing requirements. The vibration frequency and amplitude should be moderate to ensure effective elimination of residual stress while avoiding excessive impact and wear on the equipment. The vibration time should also be adjusted according to the processing cycle and equipment condition to ensure optimal damping effect.

[0024] The guide column cavity is equipped with a nanofiber filter layer, which automatically adsorbs metal debris using the flow of hydraulic oil. A fiber optic micro-leakage sensor is installed at the connection between the guide column and the main cylinder. This sensor is used to monitor oil leakage in real time and trigger an alarm. The nanofiber filter layer and the fiber optic micro-leakage sensor can extend the hydraulic oil replacement cycle, reduce maintenance costs, and prevent sudden leakage accidents.

[0025] Magnetorheological fluid is injected into the sliding sleeve, and electromagnetic coils are embedded on the surface of the guide posts. During the pressing process, the viscosity of the magnetorheological fluid is changed by controlling the current intensity, thereby achieving dynamic locking of the movable plate, eliminating micro-displacement at the moment of pressing, and improving the processing accuracy to the micrometer level.

[0026] The inner wall of the guide post cavity is designed with a spiral damping groove, which is used to disrupt the fluid resonance frequency. When the guide post is used as a hydraulic channel, the flow of high-pressure oil may cause resonance, affecting machining accuracy.

[0027] The beneficial effects of this invention are as follows: This invention utilizes a precision-designed hydraulic press, leveraging the synergistic effect of a filling mechanism and a hydraulic system, to achieve rapid filling and efficient compression processing of the movable plate. A telescopic rod assists in the smooth repositioning of the movable plate. The elastic element at the bottom of the guide column cavity, the vibration damping device, and the safety design of the control center collectively ensure processing accuracy, stability, and safety. The lower placement of the main hydraulic cylinder improves the response speed and safety of the hydraulic circuit; the integrated hydraulic circuit block connects to the cylinder to reduce leakage points; and the use of a logic back pressure valve group and a secondary cylinder enables rapid pressurization, significantly improving production efficiency. Simultaneously, an emergency return device and a top-loading device enhance the safety and operational efficiency of the equipment. The overall structure is compact and small, reducing equipment size, weight, and production costs, providing users with an economical, high-efficiency, and rapid hydraulic press. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the hydraulic mechanism of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of the base and movable plate of the present invention;

[0031] Figure 4 This is a cross-sectional view of the main hydraulic cylinder of the present invention;

[0032] Figure 5 This is a cross-sectional view of the guide post of the present invention.

[0033] The reference numerals in the figures include:

[0034] 1. Filling mechanism; 2. Hydraulic mechanism; 3. Main cylinder; 4. Base; 5. Top beam; 6. Movable plate; 7. Guide column; 8. Telescopic rod; 9. Lifting mechanism; 11. Drive component; 12. Lifting rod; 13. Lifting hole; 14. Secondary cylinder; 15. Back pressure valve assembly; 16. Control valve; 17. Elastic component; 18. Control center; 19. Emergency return device; 21. Pressure sensor; 22. Two-hand buttons; 23. Safety light curtain; 24. Temperature control system; 25. Sliding sleeve; 26. Vibration elimination device; 27. Spiral damping groove. Detailed Implementation

[0035] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0036] Please see Figures 1 to 5As shown, a hydraulic press of the present invention includes a filling mechanism 1 and a hydraulic mechanism 2 used in conjunction with the filling mechanism 1; the hydraulic mechanism 2 includes a main cylinder 3, a base 4, a top beam 5, and a movable plate 6 installed between the base 4 and the top beam 5. Multiple guide columns 7 are installed between the base 4 and the top beam 5. The movable plate 6 is reciprocally mounted on the multiple guide columns 7. A telescopic rod 8 is also provided at one end of the movable plate 6 near the base 4, and the telescopic rod 8 is used to assist in driving the movable plate 6 to reciprocate between the base 4 and the top beam 5; the main cylinder... 3 is installed below the base 4. The guide column 7 has a hollow structure and is connected to the main oil cylinder 3. The filling mechanism 1 is used to quickly fill the main oil cylinder 3 with liquid. After the main oil cylinder 3 is filled with liquid, it drives the pressure inside the guide column 7 to rise. The rise in pressure inside the guide column 7 drives the movable plate 6 to move closer to the top beam 5 to perform compression processing. After processing is completed, the filling mechanism 1 stops filling and releases pressure and flows back. The pressure inside the main oil cylinder 3 and the guide column 7 cavity is gradually released. With the assistance of the telescopic rod 8, the movable plate 6 returns to the initial position to perform the next processing operation.

[0037] Through the coordinated action of the filling mechanism 1 and the hydraulic mechanism 2, rapid filling drives the movable plate 6 for efficient compression processing. Simultaneously, the telescopic rod 8 assists the movable plate 6 in smoothly resetting, improving processing accuracy and efficiency. Specifically, the filling mechanism 1 rapidly fills the main cylinder 3 with fluid, causing the pressure in the main cylinder 3's cavity to rise and be transmitted to the guide column 7 in the hollow structure, driving the movable plate 6 to move towards the top beam 5 for product compression processing. After processing is complete, the filling mechanism 1 stops filling and initiates pressure relief and return, releasing the pressure in the main cylinder 3 and guide column 7. The telescopic rod 8 assists the movable plate 6 in smoothly returning to its initial position, preparing for the next processing cycle.

[0038] The main cylinder 3 of this hydraulic press is located at the bottom, and the stamping work is carried out from bottom to top. This structure has two advantages: first, it can reduce the height of the machine body and shorten the distance to the main oil tank, reduce the footprint and improve the response speed of the oil circuit; second, it can avoid the safety hazards caused by the piston sliding down due to its own weight.

[0039] The hydraulic press also includes a lifting mechanism 9, which is mounted on the base 4. The lifting mechanism 9 includes a driving component 11 and a lifting rod 12 connected to the output end of the driving component 11. The base 4 and the movable plate 6 are both provided with connecting lifting holes 13. The driving component 11 drives the lifting rod 12 to move back and forth through the lifting holes 13 on the base 4 and the movable plate 6, thereby pushing the processed product placed on the movable plate 6 out of the movable plate 6.

[0040] During the processing stage, the filling mechanism 1 rapidly fills the main oil cylinder 3 with liquid, pushing the movable plate 6 smoothly along the guide column 7 to the top beam 5, performing precise compression processing on the workpiece placed on the movable plate 6. After processing, the filling mechanism 1 stops filling and initiates the depressurization process, and the movable plate 6 smoothly returns to its original position with the assistance of the telescopic rod 8. The lifting mechanism 9 added to this press, with its drive component 11 precisely controlling the reciprocating motion of the lifting rod 12 within the lifting hole 13 that connects the base 4 and the movable plate 6, can automatically lift the workpiece off the movable plate 6 after processing, facilitating the removal of subsequent workpieces and the placement of new workpieces. This greatly simplifies the manual operation process, reduces manual intervention, and improves operational safety and continuity. This design not only ensures processing accuracy and efficiency but also brings users a more convenient and efficient production experience through a high degree of automation and intelligence.

[0041] The hydraulic press also includes a secondary cylinder 14 installed inside the main cylinder 3. The volume of the secondary cylinder 14 is smaller than that of the main cylinder 3. The secondary cylinder 14 is used to quickly push the movable plate 6 upward in the initial stage. The secondary cylinder 14 is connected to the main cylinder 3 through a hydraulic pipeline and is connected to the guide column 7. The filling mechanism 1 outputs hydraulic oil to the secondary cylinder 14. The hydraulic rise of the secondary cylinder 14 drives the pressure inside the guide column 7 to rise. The rise in pressure in the guide column 7 drives the movable plate 6 to move closer to the top beam 5 to perform compression processing on the product to be processed.

[0042] The filling mechanism 1 also includes a back pressure valve group 15. The auxiliary cylinder 14 is provided with a control valve 16 connected to the back pressure valve group 15. The filling mechanism 1 fills the auxiliary cylinder 14 with liquid. When the pressure in the cavity of the auxiliary cylinder 14 rises to the pressure value set by the back pressure valve group 15, the control valve 16 of the auxiliary cylinder 14 opens. Hydraulic oil is filled into the main cylinder 3 through the auxiliary cylinder 14 and the filling channel of the auxiliary cylinder 14 is closed. The pressure in the cavity of the main cylinder 3 rises rapidly, driving the movable plate 6 to move closer to the top beam 5 to the product to be processed for compression processing.

[0043] This hydraulic press innovatively uses a logic back pressure valve group 15 as the main cylinder pressure switch in its hydraulic system. An auxiliary cylinder 14 is designed inside the main cylinder. When the filling mechanism 1 outputs hydraulic oil to the auxiliary cylinder 14, the movable plate 6 is pushed upwards rapidly. When the pressure inside the auxiliary cylinder 14 rises to the pressure set by the logic back pressure valve group 15, the control valve 16 opens, the main cylinder 3 begins to rapidly fill with hydraulic fluid, and the auxiliary cylinder 14 channel is closed. The main cylinder 3 then rapidly increases in pressure. This pressure-increasing method eliminates the traditional slow feed stage, significantly improving the production efficiency of the hydraulic press. It is particularly suitable for batch production processes such as printing, embossing, and shallow stretching.

[0044] The volume of the auxiliary cylinder 14 is smaller than that of the main cylinder 3. Due to its smaller volume, the filling mechanism 1 can quickly fill the auxiliary cylinder 14 with sufficient hydraulic oil, allowing it to rapidly pressurize. This facilitates the rapid upward movement of the movable plate 6 at the initial stage of processing, initiating the entire processing flow, thereby shortening start-up time and improving production efficiency. When the pressure inside the auxiliary cylinder 14 reaches the preset pressure value of the back pressure valve assembly 15, the control valve 16 automatically opens, allowing hydraulic oil to flow from the auxiliary cylinder 14 to the main cylinder 3. This design ensures a smooth transition from the auxiliary cylinder 14 to the main cylinder 3, avoiding potential equipment shocks and instability caused by instantaneous high pressure. Simultaneously, the pressure changes during processing can be precisely controlled through the adjustment of the back pressure valve assembly 15, further improving processing accuracy. Using the smaller-volume auxiliary cylinder 14 for rapid pressurization and start-up at the initial stage of processing reduces unnecessary energy consumption. As the processing progresses, the main cylinder 3 begins to dominate the processing, at which point the auxiliary cylinder 14 has completed its task and no longer requires additional energy input. This design helps to achieve the goals of energy saving and high-efficiency production.

[0045] The bottom of the cavity of the guide post 7 is provided with an elastic element 17. The elastic element 17 is used to assist the movable plate 6 to return to the initial position and prevent the movable plate 6 from shaking or shifting due to pressure relief, thereby improving the processing accuracy.

[0046] During processing, the movable plate 6 moves smoothly along the guide post 7 under the drive of the hydraulic system, performing precise compression processing on the workpiece placed on it. After processing is completed, the filling mechanism 1 stops filling, and the system begins to depressurize. At this time, the elastic elements 17 (such as springs or elastic washers) at the bottom of the guide post 7 cavity begin to function, assisting the movable plate 6 to smoothly return to its initial position, effectively preventing shaking or displacement caused by depressurization. This design not only ensures the precise positioning of the movable plate 6 during processing but also improves processing accuracy and stability.

[0047] The hydraulic press also includes a control center 18, which includes an emergency return device 19. A pressure sensor 21 is installed on the hydraulic mechanism 2. When the pressure sensor 21 detects an abnormal pressure in the hydraulic mechanism 2 or a malfunction in the equipment operation, the control center 18 immediately activates the emergency return device 19. The movable plate 6 stops the mold closing action and returns to the initial position. After returning to the initial position, the lifting mechanism 9 completes one product ejection action and ends the operation of the hydraulic press.

[0048] During processing, the pressure sensor 21 on the hydraulic mechanism 2 monitors the system pressure status in real time. If an abnormal pressure is detected or a malfunction occurs, the control center 18 immediately responds and activates the emergency return device 19. This device quickly cuts off the power source to the hydraulic system, stopping the current mold-closing action of the movable plate 6 and smoothly returning it to its initial position. This design effectively prevents equipment damage or personal injury due to malfunctions, ensuring the safety of the processing. After the movable plate 6 returns to its initial position, the lifting mechanism 9 automatically starts, ejecting the processed product from the movable plate 6 for subsequent operations. Simultaneously, the control center 18 issues a command to terminate the operation of the hydraulic press, preventing the equipment from continuing to operate under fault conditions. This process ensures that even in the event of a malfunction, the equipment can be quickly and safely stopped, ready for troubleshooting or repair.

[0049] The control center 18 also includes a two-hand button 22, which is used to start and stop the hydraulic press. A safety light curtain 23 is installed on the hydraulic mechanism 2. When the safety light curtain 23 is blocked, the safety light curtain 23 emits a warning signal and the movable plate 6 stops moving. The movable plate 6 can only continue to work after the two-hand button 22 is pressed again.

[0050] The design of the two-hand button 22 requires the operator to press the button simultaneously with both hands when starting or continuing the processing, thus avoiding the risk of misoperation that may occur with single-handed operation. This design effectively prevents accidental start-up due to operator negligence or fatigue, improving equipment safety. Meanwhile, the safety light curtain 23 installed on the hydraulic mechanism 2 serves as another safety barrier, immediately issuing a warning signal when it detects an object (such as the operator's hand or other body part) obstructing the flow. Even if the operator has already pressed the two-hand button 22, the movable plate 6 will immediately stop moving, preventing crushing or collision accidents caused by accidental obstruction. The movable plate 6 can only continue operating when the operator removes the obstruction and presses the two-hand button 22 again. This design ensures the safety and reliability of the equipment during processing.

[0051] The hydraulic press includes a temperature control system 24, which is used to monitor and adjust the hydraulic oil temperature in real time to avoid equipment damage and reduced processing accuracy due to excessively high or low oil temperature.

[0052] The temperature control system 24 includes a temperature monitoring module, a cooling device, and a heating device. Temperature sensors are installed in the hydraulic system to monitor the hydraulic oil temperature in real time. These sensors can be located in key areas such as the main cylinder 3, auxiliary cylinder, hydraulic lines, and oil tank. When the hydraulic oil temperature exceeds the set upper limit, the cooling device automatically activates. The cooling device can be an air-cooled radiator or a water-cooled heat exchanger, the specific choice depending on the equipment's operating environment and heat dissipation requirements. When the hydraulic oil temperature falls below the set lower limit, the heating device automatically activates. The heating device can be an electric heater or a heat exchanger, used to preheat the hydraulic oil in low-temperature environments.

[0053] The connection between the movable plate 6 and the guide post 7 is also provided with a sliding sleeve 25. The sliding sleeve 25 is made of wear-resistant material. The sliding sleeve 25 is used to reduce the friction between the movable plate 6 and the guide post 7, reduce wear, ensure the stable reciprocating movement of the movable plate 6, and reduce noise and vibration during reciprocating movement.

[0054] The bottom of the hydraulic mechanism 2 is also provided with a vibration elimination device 26. The vibration elimination device 26 is activated after the movable plate 6 completes a compression operation and returns to the initial position. The vibration elimination device 26 eliminates the residual stress between the movable plate 6 and the guide post 7 by generating a small vibration, thereby improving the accuracy and stability of the next processing.

[0055] The vibration eliminator 26 should be designed to be tightly connected to the bottom of the hydraulic mechanism 2 to ensure stable vibration generation. The device should contain a vibration source (such as an electromagnetic vibrator or pneumatic vibrator) to control parameters such as vibration frequency, amplitude, and duration. The vibration parameters of the vibration eliminator 26 should be set appropriately according to the specific equipment and processing requirements. The vibration frequency and amplitude should be moderate to ensure effective elimination of residual stress while avoiding excessive impact and wear on the equipment. The vibration time should also be adjusted according to the processing cycle and equipment condition to ensure optimal elimination effect.

[0056] The guide column 7 has a nanofiber filter layer inside its cavity, which automatically adsorbs metal debris using the flow of hydraulic oil. A fiber optic micro-leakage sensor is installed at the connection between the guide column 7 and the main cylinder 3. The fiber optic micro-leakage sensor is used to monitor oil leakage in real time and trigger an alarm. The nanofiber filter layer and the fiber optic micro-leakage sensor can extend the hydraulic oil replacement cycle, reduce maintenance costs, and prevent sudden leakage accidents.

[0057] Magnetorheological fluid is injected into the sliding sleeve 25, and an electromagnetic coil is embedded on the surface of the guide post. During the pressing process, the viscosity of the magnetorheological fluid is changed by controlling the current intensity, thereby achieving dynamic locking of the movable plate 6, eliminating micro-displacement at the moment of pressing, and improving the processing accuracy to the micrometer level.

[0058] The inner wall of the guide post 7 cavity is designed with a spiral damping groove 27, which is used to disrupt the fluid resonance frequency. When the guide post 7 is used as a hydraulic channel, the flow of high-pressure oil may cause resonance, affecting machining accuracy.

[0059] The above description is only a preferred embodiment of the present invention. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. A hydraulic press, characterized in that: The system includes a filling mechanism (1) and a hydraulic mechanism (2) used in conjunction with the filling mechanism (1). The hydraulic mechanism (2) includes a main cylinder (3), a base (4), a top beam (5), and a movable plate (6) installed between the base (4) and the top beam (5). Multiple guide posts (7) are installed between the base (4) and the top beam (5). The movable plate (6) is reciprocated and installed on the multiple guide posts (7). The movable plate (6) is also provided with a telescopic rod (8) at one end near the base (4). The telescopic rod (8) is used to assist in driving the movable plate (6) to reciprocate between the base (4) and the top beam (5). Movement; The main oil cylinder (3) is installed below the base (4). The guide column (7) is a cavity structure and is connected to the main oil cylinder (3). The filling mechanism (1) is used to fill the main oil cylinder (3) with liquid. After the main oil cylinder (3) is filled with liquid, it drives the pressure inside the guide column (7) to rise. The pressure inside the guide column (7) rises and drives the movable plate (6) to move closer to the top beam (5) to the product to be processed for compression processing. After the processing is completed, the filling mechanism (1) stops filling liquid and releases pressure and flows back. The pressure inside the cavity of the main oil cylinder (3) and the guide column (7) is gradually released. The movable plate (6) returns to the initial position with the assistance of the telescopic rod (8). The hydraulic press also includes a lifting mechanism (9), which is mounted on the base (4). The lifting mechanism (9) includes a drive component (11) and a lifting rod (12) connected to the output end of the drive component (11). The base (4) and the movable plate (6) are provided with connecting lifting holes (13). The drive component (11) drives the lifting rod (12) to move back and forth in the lifting holes (13) on the base (4) and the movable plate (6) to push the processed product placed on the movable plate (6) out of the movable plate (6). The hydraulic press also includes a secondary cylinder (14) installed inside the main cylinder (3). The volume of the secondary cylinder (14) is smaller than that of the main cylinder (3). The secondary cylinder (14) is used to quickly push the movable plate (6) upward in the initial stage. The secondary cylinder (14) is connected to the main cylinder (3) through a hydraulic pipeline. The secondary cylinder (14) is connected to the guide column (7). The filling mechanism (1) outputs hydraulic oil to the secondary cylinder (14). The hydraulic rise of the secondary cylinder (14) drives the pressure inside the guide column (7) to rise. The pressure inside the guide column (7) rises and drives the movable plate (6) to move closer to the top beam (5) to the product to be processed for compression processing. The cavity of the guide post (7) is equipped with a nano-filter layer, which automatically adsorbs metal debris by the flow of hydraulic oil. A fiber optic micro-leakage sensor is installed at the connection between the guide post (7) and the main cylinder (3). The fiber optic micro-leakage sensor is used to monitor oil leakage in real time and trigger an alarm. Magnetorheological fluid is injected into the sliding sleeve (25), and an electromagnetic coil is embedded on the surface of the guide post (7). During the pressing process, the viscosity of the magnetorheological fluid is changed by controlling the current intensity, so as to realize the dynamic locking of the movable plate (6) and eliminate the micro-displacement at the moment of pressing.

2. The hydraulic press according to claim 1, characterized in that: The filling mechanism (1) also includes a back pressure valve group (15). The auxiliary cylinder (14) is provided with a control valve (16) connected to the back pressure valve group (15). The filling mechanism (1) fills the auxiliary cylinder (14) with liquid. When the pressure in the cavity of the auxiliary cylinder (14) rises to the pressure value set by the back pressure valve group (15), the control valve (16) of the auxiliary cylinder (14) opens. The hydraulic oil is filled into the main cylinder (3) through the auxiliary cylinder (14) and the filling channel of the auxiliary cylinder (14) is closed. The pressure in the cavity of the main cylinder (3) rises rapidly, driving the movable plate (6) to move closer to the top beam (5) to the product to be processed for compression processing.

3. The hydraulic press according to claim 1, characterized in that: The bottom of the cavity of the guide post (7) is provided with an elastic element (17). The elastic element (17) is used to assist the movable plate (6) to return to the initial position and prevent the movable plate (6) from shaking or shifting due to pressure relief, thereby improving the processing accuracy.

4. A hydraulic press according to claim 1, characterized in that: The hydraulic press also includes a control center (18), which includes an emergency return device (19). A pressure sensor (21) is provided on the hydraulic mechanism (2). When the pressure sensor (21) detects that the hydraulic mechanism (2) has abnormal pressure or that the equipment is malfunctioning, the control center (18) immediately starts the emergency return device (19), the movable plate (6) stops the mold closing action and returns to the initial position. After returning to the initial position, the lifting mechanism (9) completes one product ejection action and ends the hydraulic press operation.

5. A hydraulic press according to claim 4, characterized in that: The control center (18) also includes a two-hand button (22), which is used to start and stop the hydraulic press. A safety light curtain (23) is installed on the hydraulic mechanism (2). When the safety light curtain (23) is blocked, the safety light curtain (23) emits a warning signal and the movable plate (6) stops moving. The movable plate (6) can only continue to work after the two-hand button (22) is pressed again.

6. A hydraulic press according to claim 1, characterized in that: The hydraulic press includes a temperature control system (24) for real-time monitoring and adjustment of hydraulic oil temperature to avoid equipment damage and reduced processing accuracy due to excessively high or low oil temperature.

7. A hydraulic press according to claim 1, characterized in that: The connection between the movable plate (6) and the guide post (7) is also provided with a sliding sleeve (25). The sliding sleeve (25) is made of wear-resistant material and is used to reduce the friction between the movable plate (6) and the guide post (7).

8. A hydraulic press according to claim 1, characterized in that: The bottom of the hydraulic mechanism (2) is also provided with a vibration elimination device (26). The vibration elimination device (26) is activated after the movable plate (6) completes a compression operation and returns to the initial position. The vibration elimination device (26) eliminates the residual stress between the movable plate (6) and the guide column (7) by generating a small vibration, thereby improving the accuracy and stability of the next processing.

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