Auxiliary sliding block hydraulic lifting system
Through the auxiliary slide hydraulic lifting system, components such as lifting cylinders and displacement sensors are used to solve the problem of insufficient space during press mold maintenance, and the maintenance space is provided without affecting normal operation, which improves the convenience and accuracy of maintenance.
Patent Information
- Application Number
- CN202510522545.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2025-07-11
AI Technical Summary
During the mold repair of existing presses, the hydraulic oil in the slider cylinder cannot be emptied, resulting in a lack of repair space between the upper mold and the lower mold, affecting the maintenance operation.
An auxiliary slide hydraulic lifting system is designed. By lifting the oil cylinder and displacement sensor, combined with hydraulic pump stations, proportional servo valves and other components, the slide is accurately lifted and lowered, ensuring that there is enough space during maintenance and not affecting the press stamping process during normal operation.
Without affecting the normal operation of the press, sufficient mold repair space is provided to ensure accurate lifting and descent of the slider, and improve the convenience and accuracy of maintenance.
Smart Images
Figure CN120286628A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of presses, and particularly relates to an auxiliary slider hydraulic lifting system. Background Art
[0002] A press is a general-purpose pressure mechanical device with a delicate structure, and has the characteristics of wide application and high production efficiency. The press can be widely used in processes such as cutting, punching, blanking, bending, riveting and forming. By applying a strong pressure to a metal blank, the metal undergoes plastic deformation and fracture to be processed into parts. When the mechanical press works, the motor drives the large pulley (usually also used as a flywheel) through a V-belt, and through a gear pair and a clutch, drives the crank-slider mechanism, so that the slider and the punch move linearly downward. After the forging work of the mechanical press is completed, the slider moves upward, the clutch automatically disengages, and at the same time, the automatic device on the crankshaft is turned on, so that the slider stops near the top dead center.
[0003] An upper die is installed on the lower side of the slider of the press, and a lower die corresponding to the upper die is installed on the press. The rotation of the crankshaft drives the upper die on the slider to reciprocate up and down through a connecting rod, so that the upper die and the lower die process the workpiece; a ball screw is threadedly connected to the connecting rod, and the lower end of the ball screw is hinged to an oil cylinder on the slider. At present, the stroke of the press machine tool is 30 - 50 mm, and the problem is that when the die needs to be repaired, even when the slider reaches the top dead center, the hydraulic oil in the slider oil cylinder cannot be emptied, resulting in the inability to meet the repair space between the upper die and the lower die. Summary of the Invention
[0004] The purpose of the invention is to provide an auxiliary slider hydraulic lifting system, which can facilitate the auxiliary control of the slider to rise, so that enough space is left between the upper die and the lower die for repair operations, and usually does not participate in the reciprocating up and down movement of the press slider, without affecting the stamping operation of the press.
[0005] The purpose of the invention is realized as follows: an auxiliary slider hydraulic lifting system includes a press body, a rotatable crankshaft is arranged on the press body, at least one connecting rod is hinged to the crankshaft, a ball screw is threadedly connected to the lower end of the connecting rod, a vertically movable slider is arranged on the press body corresponding to the ball screw, an upper template is horizontally arranged on the lower side of the slider, a horizontal lower template is arranged on the press body corresponding to the upper template, a plurality of slider oil cylinders are arranged on the slider corresponding to the ball screw, and the ball head of the ball screw is hinged to the corresponding slider oil cylinder; a connection support is arranged on each of the left and right sides of the slider, longitudinal mounting seat plates are arranged on the press body on the left and right sides of the slider, a lifting oil cylinder is vertically arranged on the mounting seat plate, the piston rod of the lifting oil cylinder passes through the mounting seat plate downward, a lifting groove is formed in the connection support corresponding to the lifting oil cylinder, and the lower end of the piston rod of the lifting oil cylinder passes through the corresponding lifting groove and is provided with a lifting gland; both of the two lifting oil cylinders are connected to a hydraulic oil supply system.
[0006] When the present invention is working and the press needs to be repaired, the machine tool slider stops at the top dead center. Manually turn on the pneumatic pump pressure and oil discharge switch of the press. After the slider oil cylinder completes pressure and oil discharge, the pneumatic pump detection switch sends a signal to the motion controller, and the motion controller allows the lifting oil cylinder to operate. Press the lifting button of the lifting oil cylinder, and the lifting oil cylinder works and its piston moves upward. The displacement sensor of the lifting oil cylinder real-time monitors the movement position of the piston and transmits the position signal of the piston to the motion controller. The signal of proportional servo valve 1 is also transmitted to the motion controller. The motion controller controls proportional servo valve 2, proportional servo valve 3, and proportional servo valve 4 to ensure that the piston positions detected by the two displacement sensors of the lifting oil cylinder are consistent, ensuring that the lifting heights of the two lifting oil cylinders are the same. When the lifting gland of the lifting oil cylinder touches the connection support, the slider starts to lift upward. After lifting 50 mm, the displacement sensor of the lifting oil cylinder sends a signal to the motion controller, and the hydraulic pump station stops supplying oil. After the machine tool die is repaired, the lifting oil cylinder quickly drops. After reaching the initial position at the lowest point of the piston, the displacement sensor sends a signal to the motion controller, and then the slider oil cylinder replenishes oil and pressure.
[0007] Compared with the prior art, the beneficial effects of the present invention are as follows: The lifting oil cylinder of the present invention passes through the lifting groove without contacting the inner wall of the lifting groove. During normal stamping operation of the press, the lifting gland of the piston rod of the lifting oil cylinder is located below the connection support, which does not affect the normal operation of the press slider. When the press die needs to be repaired, the lifting gland of the lifting oil cylinder moves upward to contact the connection support, and then the slider is lifted upward, leaving enough space between the upper and lower dies for convenient repair operation. The machine tool stroke is 30 - 50 mm. When the die needs to be repaired, the lifting oil cylinder lifts the slider to meet the repair space. The hydraulic pump station is equipped with proportional servo valves, and the lifting oil cylinder is equipped with displacement sensors to ensure that the two lifting oil cylinders act simultaneously to lift the slider without affecting the accuracy of the slider. After the slider is lifted by the lifting oil cylinder, the one-way valve of the hydraulic pump station ensures that the piston of the lifting oil cylinder does not fall.
[0008] As a further improvement of the present invention, a through hole through which the piston rod of the lifting oil cylinder can pass is provided on the mounting seat plate.
[0009] As a further improvement of the present invention, the connection support includes a horizontal seat plate 1 and a vertical seat plate 2. A triangular reinforcement plate is correspondingly provided between the seat plate 1 and the seat plate 2. The seat plate 2 is fixedly connected to the slider through a plurality of fasteners. The lifting groove is circular. The lifting gland is circular, the diameter of the lifting gland is larger than the inner diameter of the lifting groove, the distance between the upper side of the lifting gland and the lower side of the seat plate 1 is 20 - 21 mm, and the lifting gland corresponds to the seat plate 1. The connection support has a triangular stable structure, improving its structural stability. The lifting gland is located below the connection support, which does not affect the normal operation of the press.
[0010] As a further improvement of the present invention, at least two balance cylinders corresponding to the slider are arranged on the press body, the piston rods of the balance cylinders are vertically downward and connected to the slider, and a displacement sensor is arranged in the lifting oil cylinder. The balance cylinders play a balancing role on the slider, and the displacement sensor detects the lifting position of the slider by the lifting oil cylinder.
[0011] As a further improvement of the present invention, the hydraulic oil supply system includes a hydraulic pump station, an electric pump unit is arranged on the hydraulic pump station, the oil outlet of the electric pump unit is correspondingly arranged with a three-position four-way solenoid valve, the three-position four-way solenoid valve has A, B, P and T oil ports, the P oil port and the T oil port of the three-position four-way solenoid valve are respectively connected to the outlet of the electric pump unit and the oil return port of the hydraulic pump station, the A oil port and the B oil port of the three-position four-way solenoid valve are communicated with a check valve group, a valve block one and a valve block two are correspondingly arranged with the check valve group, the valve block one has A1, A2 and A3 oil ports, the valve block two has B1, B2 and B3 oil ports, the A1 and A3 oil ports, and the A2 and A3 oil ports of the valve block one are all conducted, the B1 and B3 oil ports, and the B2 and B3 oil ports of the valve block two are all conducted, the other end of the check valve group is communicated with the A3 oil port of the valve block one and the B3 oil port of the valve block two, the A1 and A2 oil ports of the valve block one are respectively communicated with a throttle valve one and a throttle valve two, the B1 and B2 oil ports of the valve block two are respectively communicated with a throttle valve three and a throttle valve four, the other ends of the throttle valve one, the throttle valve two, the throttle valve three and the throttle valve four are respectively connected to a proportional servo valve one, a proportional servo valve two, a proportional servo valve three and a proportional servo valve four, the other ends of the proportional servo valve one and the proportional servo valve two are respectively connected to the rodless cavities of the two lifting oil cylinders, and the other ends of the proportional servo valve three and the proportional servo valve four are respectively connected to the rodless cavities of the two lifting oil cylinders. The oil is pumped into the P oil port of the three-position four-way solenoid valve through the electric pump group of the hydraulic pump station. When the spool of the three-position four-way solenoid valve is in the right position, the oil flows out from the A oil port and enters the A3 oil port of the valve block one. The A1 and A2 oil ports of the valve block one supply the oil to the rodless cavities of the two lifting oil cylinders through the throttle valve one and the throttle valve two. The lifting oil cylinders lift the slider. The rodless cavities of the two lifting oil cylinders enter the other pilot-operated check valve through the B1 and B2 oil ports of the valve block two and then return the oil to the hydraulic pump station from the B3 oil port; when the spool of the three-position four-way solenoid valve is in the left position, the oil enters the rodless cavities of the two lifting oil cylinders, the rodless cavities of the lifting oil cylinders return the oil to the hydraulic pump station, and the slider descends.
[0012] As a further improvement of the present invention, a liquid level sensor, an air filter and a liquid level and liquid temperature gauge are arranged on the hydraulic pump station. It is convenient to detect the liquid level and oil temperature.
[0013] As a further improvement of the present invention, the pipeline between the A3 oil port of the first valve block and the one-way valve group is also connected to an accumulator, and a pressure switch is correspondingly arranged with respect to the accumulator; the displacement sensors in the first proportional servo valve, the second proportional servo valve, the third proportional servo valve, the fourth proportional servo valve, and the two lifting cylinders are all electrically connected to a motion controller. The displacement sensors of the lifting cylinders real-time monitor the movement position of the pistons and transmit the position signals of the pistons to the motion controller, and the signal of the first proportional servo valve is also transmitted to the motion controller. The motion controller controls the second proportional servo valve, the third proportional servo valve, and the fourth proportional servo valve to ensure that the piston positions detected by the two displacement sensors of the lifting cylinders are consistent, and to ensure that the lifting heights of the two lifting cylinders are the same.
[0014] As a further improvement of the present invention, when the three-position four-way solenoid valve is in the middle position, the A, B, and T oil ports of the three-position four-way solenoid valve are all conducted pairwise; when the three-position four-way solenoid valve is in the left position, the P and B oil ports are conducted, and the A and T oil ports are conducted; when the three-position four-way solenoid valve is in the right position, the P and A oil ports are conducted, and the B and T oil ports are conducted. When the three-position four-way solenoid valve is in the middle position, the accumulator supplies oil to the two lifting cylinders to prevent the pistons of the lifting cylinders from falling and causing the slider to slide down.
[0015] As a further improvement of the present invention, the one-way valve group includes two pilot-operated check valves. The inlets of the two pilot-operated check valves are respectively conducted with the A and B oil ports of the three-position four-way solenoid valve, and the outlets of the two pilot-operated check valves are respectively conducted with the A3 oil port of the first valve block and the B3 oil port of the second valve block. Any one of the pilot-operated check valves is connected to the other pilot-operated check valve through a pilot control oil circuit. The two pilot-operated check valves form a hydraulic lock, and the pilot control oil circuit pushes open the pilot-operated check valve to facilitate oil return. Description of the Drawings
[0016] Figure 1 It is a structural schematic diagram of the present invention.
[0017] Figure 2 It is Figure 1 The enlarged view at A in
[0018] Figure 3 It is an installation schematic diagram of the lifting cylinder of the present invention.
[0019] Figure 4 It is a structural schematic diagram of the connection support.
[0020] Figure 5 It is a structural schematic diagram of the hydraulic oil supply system.
[0021] Among them, 1 is the pressure body, 2 is the crankshaft, 3 is the connecting rod, 4 is the ball head screw, 5 is the slider, 6 is the upper template, 7 is the lower template, 8 is the slider oil cylinder, 9 is the connecting support, 9a is the first seat plate, 9b is the second seat plate, 9c is the reinforcement plate, 10 is the mounting seat plate, 11 is the lifting oil cylinder, 11a is the lifting gland, 12 is the lifting groove, 13 is the through hole, 14 is the balance cylinder, 15 is the displacement sensor, 16 is the hydraulic pump station, 17 is the motor pump unit, 18 is the three-position four-way solenoid valve, 19 is the check valve group, 19a is the hydraulic control check valve, 19b is the pilot control oil circuit, 20 is the first valve block, 21 is the second valve block, 22 is the first throttle valve, 23 is the second throttle valve, 24 is the third throttle valve, 25 is the fourth throttle valve, 26 is the first proportional servo valve, 27 is the second proportional servo valve, 28 is the third proportional servo valve, 29 is the fourth proportional servo valve, 30 is the motion controller, 31 is the liquid level sensor, 32 is the air filter, 33 is the liquid level and liquid temperature gauge, 34 is the accumulator, 35 is the pressure switch. Detailed implementation manner
[0022] As Figures 1-5 shown, it is an auxiliary slider hydraulic lifting system, including a pressure body 1, on which there is a rotatable crankshaft 2, at least one connecting rod 3 is hinged on the crankshaft 2, the lower end of the connecting rod 3 is threadedly connected with a ball head screw 4, a vertically movable slider 5 is arranged on the pressure body 1 corresponding to the ball head screw 4, an upper template 6 is horizontally arranged on the lower side of the slider 5, a horizontal lower template 7 is arranged on the pressure body 1 corresponding to the upper template 6, several slider oil cylinders are arranged on the slider 5 corresponding to the ball head screw 4, and the ball head of the ball head screw 4 is hinged with the corresponding slider oil cylinder; on both the left and right sides of the slider 5, there is a connecting support 9, on both the left and right sides of the slider 5 on the pressure body 1, there are longitudinal mounting seat plates 10, a lifting oil cylinder 11 is vertically arranged on the mounting seat plate 10, the piston rod of the lifting oil cylinder 11 passes downward through the mounting seat plate 10, a lifting groove 12 is opened on the connecting support 9 corresponding to the lifting oil cylinder 11, the lower end of the piston rod of the lifting oil cylinder 11 passes through the corresponding lifting groove 12 and is provided with a lifting gland 11a; both lifting oil cylinders 11 are connected to the hydraulic oil supply system. A through hole 13 through which the piston rod of the lifting oil cylinder 11 can pass is opened on the mounting seat plate 10. The connecting support 9 includes a horizontal first seat plate 9a and a vertical second seat plate 9b, a triangular reinforcement plate 9c is correspondingly arranged between the first seat plate 9a and the second seat plate 9b, the second seat plate 9b is fixedly connected to the slider 5 through several fasteners, and the lifting groove 12 is circular; the lifting gland 11a is circular, the diameter of the lifting gland 11a is larger than the inner diameter of the lifting groove 12, the distance between the upper side of the lifting gland 11a and the lower side of the first seat plate 9a is 20 - 21 mm, and the lifting gland 11a is arranged corresponding to the first seat plate 9a. The connecting support 9 has a triangular stable structure, improving its structural stability; the lifting gland 11a is located below the connecting support 9, without affecting the normal operation of the press.
[0023] On the pressure body 1, at least two balancing cylinders 14 corresponding to the slider 5 are arranged left and right correspondingly. The piston rod of the balancing cylinder 14 is vertically downward and connected to the slider 5. A displacement sensor 15 is arranged in the lifting oil cylinder 11. The balancing cylinder 14 plays a balancing role on the slider 5, and the displacement sensor 15 detects the lifting position of the lifting oil cylinder 11 on the slider 5.
[0024] The hydraulic oil supply system includes a hydraulic pump station 16, on which an electric pump unit 17 is arranged. The oil outlet of the electric pump unit 17 is correspondingly arranged with a three-position four-way solenoid valve 18. The three-position four-way solenoid valve 18 has A, B, P, and T oil ports. The P oil port and the T oil port of the three-position four-way solenoid valve 18 are respectively connected to the outlet of the electric pump unit 17 and the oil return port of the hydraulic pump station 16. The A oil port and the B oil port of the three-position four-way solenoid valve 18 are communicated with a check valve group 19. A valve block one 20 and a valve block two 21 are correspondingly arranged with the check valve group 19. The valve block one 20 has A1, A2, and A3 oil ports. The valve block two 21 has B1, B2, and B3 oil ports. The A1 and A3 oil ports, and the A2 and A3 oil ports of the valve block one 20 are all conducted. The B1 and B3 oil ports, and the B2 and B3 oil ports of the valve block two 21 are all conducted. The other end of the check valve group 19 is communicated with the A3 oil port of the valve block one 20 and the B3 oil port of the valve block two 21. The A1 and A2 oil ports of the valve block one 20 are respectively communicated with a throttle valve one 22 and a throttle valve two 23. The B1 and B2 oil ports of the valve block two 21 are respectively communicated with a throttle valve three 24 and a throttle valve four 25. The other ends of the throttle valve one 22, the throttle valve two 23, the throttle valve three 24, and the throttle valve four 25 are respectively communicated with a proportional servo valve one 26, a proportional servo valve two 27, a proportional servo valve three 28, and a proportional servo valve four 29. The other ends of the proportional servo valve one 26 and the proportional servo valve two 27 are respectively connected to the rod chambers of two lifting cylinders 11. The other ends of the proportional servo valve three 28 and the proportional servo valve four 29 are respectively connected to the rodless chambers of two lifting cylinders 11. The oil is pumped into the P oil port of the three-position four-way solenoid valve 18 through the resistance pump group of the hydraulic pump station 16. When the spool of the three-position four-way solenoid valve 18 is in the right position, the oil from the A oil port enters the A3 oil port of the valve block one 20. The A1 and A2 oil ports of the valve block one 20 supply the oil to the rod chambers of two lifting cylinders 11 through the throttle valve one 22 and the throttle valve two 23. The lifting cylinders 11 lift the slider 5. The rodless chambers of two lifting cylinders 11 enter the other hydraulic control check valve 19a through the B1 and B2 oil ports of the valve block two 21 and then return the oil to the hydraulic pump station 16 from the B3 oil port. When the spool of the three-position four-way solenoid valve 18 is in the left position, the oil enters the rodless chambers of two lifting cylinders 11. The rod chambers of the lifting cylinders 11 return the oil to the hydraulic pump station 16, and the slider 5 descends. The check valve group 19 includes two hydraulic control check valves 19a. The inlets of the two hydraulic control check valves 19a are respectively conducted with the A and B oil ports of the three-position four-way solenoid valve 18. The outlets of the two hydraulic control check valves 19a are respectively conducted with the A3 oil port of the valve block one 20 and the B3 oil port of the valve block two 21. Any one of the hydraulic control check valves 19a is connected to the other hydraulic control check valve 19a through a pilot control oil circuit 19b. The two hydraulic control check valves 19a form a hydraulic lock. The pilot control oil circuit 19b pushes open the hydraulic control check valve 19a to facilitate oil return. A liquid level sensor 31, an air filter 32, and a liquid level and liquid temperature gauge 33 are arranged on the hydraulic pump station 16. It is convenient to detect the liquid level and the oil temperature.
[0025] The pipeline between the A3 oil port of the first valve block 20 and the one-way valve group 19 is also connected to the accumulator 34, and a pressure switch 35 is arranged corresponding to the accumulator 34; the first proportional servo valve 26, the second proportional servo valve 27, the third proportional servo valve 28, the fourth proportional servo valve 29 and the displacement sensors 15 in the two lifting cylinders 11 are all electrically connected to the motion controller 30. The displacement sensors 15 of the lifting cylinders 11 continuously monitor the movement position of the pistons and transmit the position signals of the pistons to the motion controller 30, and the signal of the first proportional servo valve 26 is also transmitted to the motion controller 30. The motion controller 30 controls the second proportional servo valve 27, the third proportional servo valve 28 and the fourth proportional servo valve 29 to ensure that the piston positions detected by the two displacement sensors 15 of the lifting cylinders 11 are consistent, so as to ensure that the lifting heights of the two lifting cylinders 11 are the same.
[0026] When the three-position four-way solenoid valve 18 is in the middle position, the A, B, and T oil ports of the three-position four-way solenoid valve 18 are all conductively connected in pairs; when the three-position four-way solenoid valve 18 is in the left position, the P and B oil ports are conductively connected, and the A and T oil ports are conductively connected; when the three-position four-way solenoid valve 18 is in the right position, the P and A oil ports are conductively connected, and the B and T oil ports are conductively connected. When the three-position four-way solenoid valve 18 is in the middle position, the accumulator 34 supplies oil to the two lifting cylinders 11 to prevent the pistons of the lifting cylinders 11 from falling and causing the slide block 5 to slide down.
[0027] When the present invention is working and the press needs to be repaired, the machine tool slide block 5 stops at the top dead center. Manually turn on the pneumatic pump pressure relief and oil discharge switch of the press. After the oil cylinder of the slide block 5 completes oil discharge and pressure relief, the pneumatic pump detection switch sends a signal to the motion controller 30, and the motion controller 30 allows the lifting cylinder 11 to act; press the lifting button of the lifting cylinder 11, the lifting cylinder 11 works and its piston moves upward. The displacement sensors 15 of the lifting cylinder 11 continuously monitor the movement position of the piston and transmit the position signal of the piston to the motion controller 30, and the signal of the first proportional servo valve 26 is also transmitted to the motion controller 30. The motion controller 30 controls the second proportional servo valve 27, the third proportional servo valve 28 and the fourth proportional servo valve 29 to ensure that the piston positions detected by the two displacement sensors 15 of the lifting cylinder 11 are consistent, so as to ensure that the lifting heights of the two lifting cylinders 11 are the same; when the lifting gland 11a of the lifting cylinder 11 contacts the connection support 9, the slide block 5 starts to lift upward. After lifting 50 mm, the displacement sensor 15 of the lifting cylinder 11 sends a signal to the motion controller 30, and the hydraulic pump station 16 stops supplying oil; after the machine tool die is repaired, the lifting cylinder 11 quickly drops. After reaching the initial position at the lowest point of the piston, the displacement sensor 15 sends a signal to the motion controller 30, and the oil cylinder of the slide block 5 replenishes oil and pressure.
[0028] The lifting oil cylinder 11 of the present invention passes through the lifting groove 12 without contacting the inner wall of the lifting groove 12. During normal stamping operation of the press, the lifting gland 11a of the piston rod of the lifting oil cylinder 11 is located below the connection support 9, without affecting the normal operation of the press slider 5; when the press die needs to be repaired, the lifting gland 11a of the lifting oil cylinder 11 moves upward to contact the connection support 9, and then the slider 5 is lifted upward, leaving enough space between the upper and lower dies for convenient repair operation. The machine tool stroke is 30 - 50 mm. When the die needs to be repaired, the lifting oil cylinder 11 lifts the slider 5 to meet the repair space; the hydraulic pump station 16 is equipped with a proportional servo valve, and the lifting oil cylinder 11 is equipped with a displacement sensor 15 to ensure that the two lifting oil cylinders 11 act simultaneously to lift the slider 5 without affecting the accuracy of the slider 5; after the slider 5 is lifted by the lifting oil cylinder 11, the one-way valve of the hydraulic pump station 16 ensures that the piston of the lifting oil cylinder 11 does not fall.
[0029] The present invention is not limited to the above embodiments. Based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and deformations to some of the technical features without creative labor according to the disclosed technical content, and these substitutions and deformations are all within the protection scope of the present invention.
Claims
1. An auxiliary slider hydraulic lifting system, comprising a pressure body, on which a rotatable crankshaft is provided, at least one connecting rod is hinged on the crankshaft, a ball head screw is threadedly connected to the lower end of the connecting rod, a vertically movable slider is provided on the pressure body corresponding to the ball head screw, an upper template is horizontally arranged on the lower side of the slider, a horizontal lower template is provided on the pressure body corresponding to the upper template, a plurality of slider cylinders are arranged on the slider corresponding to the ball head screw, and the ball head of the ball head screw is hinged to the corresponding slider cylinder; characterized in that, A connection support is provided on each of the left and right sides of the slider. On the press body, mounting seat plates are provided longitudinally on both the left and right sides of the slider. A lifting oil cylinder is vertically provided on the mounting seat plate. The piston rod of the lifting oil cylinder passes downward through the mounting seat plate. A lifting groove is provided on the connection support corresponding to the lifting oil cylinder. The lower end of the piston rod of the lifting oil cylinder passes through the corresponding lifting groove and is provided with a lifting gland; both of the two lifting oil cylinders are connected to a hydraulic oil supply system.
2. The auxiliary slider hydraulic lifting system according to claim 1, wherein A through hole is provided on the mounting seat plate to allow the piston rod of the lifting oil cylinder to pass through.
3. An auxiliary slider hydraulic lifting system according to claim 1 or 2, characterized in that, The connection support includes a horizontal seat plate one and a vertical seat plate two. A triangular reinforcement plate is correspondingly provided between the seat plate one and the seat plate two. The seat plate two is fixedly connected to the slider through a plurality of fasteners. The lifting groove is circular; the lifting gland is circular. The diameter of the lifting gland is larger than the inner diameter of the lifting groove. The distance between the upper side of the lifting gland and the lower side of the seat plate one is 20 - 21 mm. The lifting gland is correspondingly arranged with respect to the seat plate one.
4. An auxiliary slider hydraulic lifting system according to claim 1 or 2, characterized in that, At least two balance cylinders corresponding to the slider are provided on the press body. The piston rods of the balance cylinders are vertically downward and are connected to the slider. A displacement sensor is provided in the lifting oil cylinder.
5. An auxiliary slider hydraulic lifting system according to any one of claims 1-4, characterized in that, The hydraulic oil supply system includes a hydraulic pump station. An electric pump unit is provided in a supporting manner on the hydraulic pump station. The oil outlet of the electric pump unit is correspondingly arranged with a three-way four-way solenoid valve. The three-way four-way solenoid valve has A, B, P, and T oil ports. The P oil port and the T oil port of the three-way four-way solenoid valve are respectively connected to the outlet of the electric pump unit and the oil return port of the hydraulic pump station. The A oil port and the B oil port of the three-way four-way solenoid valve are communicated with a one-way valve group. A valve block one and a valve block two are correspondingly arranged with respect to the one-way valve group. The valve block one has A1, A2, and A3 oil ports. The valve block two has B1, B2, and B3 oil ports. The A1 and A3 oil ports, the A2 and A3 oil ports of the valve block one are all conducted. The B1 and B3 oil ports, the B2 and B3 oil ports of the valve block two are all conducted. The other end of the one-way valve group is communicated with the A3 oil port of the valve block one and the B3 oil port of the valve block two. The A1 and A2 oil ports of the valve block one are respectively communicated with a throttle valve one and a throttle valve two. The B1 and B2 oil ports of the valve block two are respectively communicated with a throttle valve three and a throttle valve four. The other ends of the throttle valve one, the throttle valve two, the throttle valve three, and the throttle valve four are respectively communicated with a proportional servo valve one, a proportional servo valve two, a proportional servo valve three, and a proportional servo valve four. The other ends of the proportional servo valve one and the proportional servo valve two are respectively connected to the rod chambers of the two lifting oil cylinders. The other ends of the proportional servo valve three and the proportional servo valve four are respectively connected to the rodless chambers of the two lifting oil cylinders.
6. An auxiliary slider hydraulic lifting system according to claim 5, characterized in that, A liquid level sensor, an air filter, and a liquid level and liquid temperature gauge are provided on the hydraulic pump station.
7. An auxiliary slider hydraulic lifting system according to claim 5, characterized in that, The pipeline between the A3 oil port of the valve block one and the one-way valve group is also connected to an accumulator. A pressure switch is correspondingly arranged with respect to the accumulator; the displacement sensors in the proportional servo valve one, the proportional servo valve two, the proportional servo valve three, the proportional servo valve four, and the two lifting oil cylinders are all electrically connected to a motion controller.
8. An auxiliary slider hydraulic lifting system according to claim 5, characterized in that, When the three-position four-way solenoid valve is in the middle position, the A, B, and T oil ports of the three-position four-way solenoid valve are connected in pairs; when the three-position four-way solenoid valve is in the left position, the P and B oil ports are connected, and the A and T oil ports are connected; when the three-position four-way solenoid valve is in the right position, the P and A oil ports are connected, and the B and T oil ports are connected.
9. An auxiliary slider hydraulic lifting system according to claim 5, characterized in that, The one-way valve group includes two hydraulically controlled one-way valves, the inlets of the two hydraulically controlled one-way valves are respectively connected to the A and B oil ports of the three-position four-way solenoid valve, the outlets of the two hydraulically controlled one-way valves are respectively connected to the A3 oil port of valve block one and the B3 oil port of valve block two, and any hydraulically controlled one-way valve is connected to the other hydraulically controlled one-way valve through a pilot control oil circuit.