A hydraulic station of a die cutting machine

Abstract

The utility model discloses a kind of hydraulic station of punching and cutting machine, it relates to hydraulic station technical field, the hydraulic station includes oil tank, oil supply circuit, multiple groups of working oil cylinder circuit and independent circulating cooling circuit: oil tank installs air cleaner, liquid level temperature sensor and liquid level thermometer;Oil supply circuit contains variable plunger pump, main valve block and oil return filter;Working oil cylinder circuit branch support class and pressure cutting class;Independent circulating cooling circuit contains fixed amount vane pump, air cooler and double branch line.The utility model cooling filtering effect is good, support safety, impact resistance is strong, adapt to high-speed automatic punching and cutting machine, can prolong system life, improve processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic station technology, specifically a hydraulic station for a punching and cutting machine. Background Technology

[0002] As the core power source of a hydraulic punching machine, the performance of the hydraulic power unit directly determines the machine's operational stability and reliability. However, existing hydraulic power units adapted to punching machines have the following technical defects: During high-speed punching machine operation, the hydraulic system needs to output a large flow rate and high pressure of oil. During oil circulation, friction generates heat, leading to temperature increases. If a cooling circuit shared with the main oil circuit is used, the cooling efficiency is low, and the high oil temperature accelerates the aging of hydraulic components. Simultaneously, impurities in the oil are difficult to filter effectively, further affecting system lifespan. The support position of the punching machine needs to maintain stable pressure to ensure processing positioning accuracy. Existing hydraulic power units lack real-time monitoring of the support position pressure, and cannot provide timely warnings when pressure is abnormal. When the punching position performs the punching action, the hydraulic system generates instantaneous impacts. Existing hydraulic power units lack buffer structures, and long-term impacts can easily damage valves and pipe joints, shortening the overall service life of the hydraulic power unit.

[0003] Therefore, there is an urgent need to design a hydraulic station that is compatible with high-speed automated punching machines, has good cooling effect, sufficient safety guarantee, and strong impact resistance, in order to overcome the shortcomings of existing technologies. Utility Model Content

[0004] In view of the problems existing in the prior art, this utility model provides a hydraulic station for a punching machine, which solves the problems of low cooling efficiency, lack of safety monitoring, weak impact resistance and poor adaptability of existing hydraulic stations for punching machines.

[0005] A hydraulic station for a punching machine includes: an oil tank with an oil supply circuit connected to it;

[0006] The oil supply circuit is divided into an oil outlet circuit and an oil return circuit. A variable displacement piston pump and a main valve block are connected in series in the oil outlet circuit, and a return oil filter is connected in series in the oil return circuit.

[0007] Multiple sets of working cylinder circuits are connected in parallel between the oil outlet circuit and the oil return circuit;

[0008] The working cylinder circuit includes the main support cylinder circuit, the large hole support cylinder circuit, the small hole support cylinder circuit, the half hole support cylinder circuit, the large hole pressing and cutting cylinder circuit, the small hole pressing and cutting cylinder circuit, and the half hole pressing and cutting cylinder circuit.

[0009] The hydraulic station also includes an independent circulating cooling circuit, which is connected to the oil tank.

[0010] As a preferred embodiment of the present invention, the main valve block includes a first check valve connected in series in the oil outlet line and an electromagnetic relief valve connected between the oil outlet line and the oil return line.

[0011] The main valve block is also equipped with a pressure gauge and a pressure sensor;

[0012] The pressure gauge is connected to the oil outlet circuit via a pressure gauge switch, and the pressure sensor is a pressure sensor with analog and digital functions.

[0013] As a preferred embodiment of this utility model, one end of the overall support cylinder circuit is connected to the oil outlet circuit and the other end is connected to the oil return circuit; the overall support cylinder circuit includes a 10-bore throttle valve, a 10-bore pressure reducing valve, a hydraulic check valve, and a solenoid directional valve connected in series.

[0014] As a preferred embodiment of this utility model, the large-hole support cylinder circuit, the small-hole support cylinder circuit, and the half-hole support cylinder circuit all include a pressure measuring valve block, a throttle valve, a pressure reducing valve, a hydraulic check valve, and a solenoid directional valve connected in series.

[0015] As a preferred embodiment of this utility model, the large-hole cutting cylinder circuit, the small-hole cutting cylinder circuit, and the half-hole cutting cylinder circuit all include a throttle valve, a pressure reducing valve, a hydraulic check valve, and a solenoid directional valve connected in series.

[0016] As a preferred embodiment of this utility model, an accumulator is connected in parallel to the large hole cutting cylinder circuit, the small hole cutting cylinder circuit, and the half hole cutting cylinder circuit.

[0017] As a preferred embodiment of this utility model, the independent circulating cooling circuit includes: a fixed displacement vane pump driven by a three-phase motor, the oil inlet of the fixed displacement vane pump being connected to an oil tank, and the oil outlet being connected to a second check valve. The oil outlet of the second check valve is divided into two branches. One branch has an air cooler and a return oil filter connected in series, and the oil outlet of the return oil filter is connected to the oil tank. The other branch has a third check valve connected, and the oil outlet of the third check valve is connected to the oil tank.

[0018] As a preferred embodiment of this utility model, the oil tank is also equipped with an air filter, a liquid level and temperature sensor, and a liquid level and temperature gauge.

[0019] By adopting the above technical solution, this utility model has the following beneficial effects:

[0020] This utility model features an independent circulating cooling circuit separated from the main oil circuit, enabling targeted forced cooling and secondary filtration of the oil. Even under high flow and high pressure conditions, the oil temperature can be controlled within a safe range, while reducing oil impurities and extending the service life of hydraulic components and oil. The support station is equipped with a pressure monitoring valve block to monitor the support pressure in real time. The cutting station is connected to a parallel accumulator, which can effectively absorb the instantaneous impact of the cutting action, reduce the probability of system failure, and extend the overall service life of the hydraulic station. Attached Figure Description

[0021] Figure 1 This is a diagram of the hydraulic system of this utility model;

[0022] Figure 2 This is an enlarged view of the hydraulic circuit of the main valve block of this utility model;

[0023] Figure 3 Enlarged views of the overall support cylinder circuit, large hole support cylinder circuit, small hole support cylinder circuit, and half hole support cylinder circuit of this utility model;

[0024] Figure 4 Enlarged views of the large-hole pressing cylinder circuit, small-hole pressing cylinder circuit, and half-hole pressing cylinder circuit of this utility model;

[0025] Figure 5 This is an enlarged view of the independent circulating cooling circuit of this utility model;

[0026] Figure 6 This is a three-dimensional schematic diagram of the main structure of the hydraulic station of this utility model;

[0027] Figure 7 This is a three-dimensional schematic diagram of the multi-group working cylinder circuit of this utility model (cylinders are not shown).

[0028] Figure 8 This is a three-dimensional schematic diagram of the independent circulating cooling circuit of this utility model.

[0029] In the diagram: 1. Oil tank; 2. Oil outlet circuit; 3. Oil return circuit; 4. Variable displacement piston pump; 5. Main valve block; 6. Main support cylinder circuit; 7. Large hole support cylinder circuit; 8. Small hole support cylinder circuit; 9. Half hole support cylinder circuit; 10. Large hole pressure cutting cylinder circuit; 11. Small hole pressure cutting cylinder circuit; 12. Half hole pressure cutting cylinder circuit; 13. Independent circulating cooling circuit; 14. First check valve; 15. Return oil filter; 16. Throttle valve; 17. Pressure reducing valve; 18. Hydraulic control check valve; 19. Solenoid directional valve; 20. Pressure testing valve block; 21. Accumulator; 22. Fixed displacement vane pump; 23. Second check valve; 24. Air cooler; 25. Third check valve. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0031] Example 1

[0032] like Figures 1 to 8As shown in the figure, a specific embodiment of the hydraulic station for a punching machine according to this utility model includes: an oil tank 1, an oil supply circuit, multiple sets of working cylinder circuits, and an independent circulating cooling circuit 13. The specific structure is as follows:

[0033] Oil Tank 1: As the basic component for oil storage and circulation, oil tank 1 is equipped with an air filter, a liquid level and temperature sensor, and a liquid level and thermometer. The air filter prevents external impurities from entering oil tank 1, the liquid level and temperature sensor monitors the oil level and temperature in real time, and the liquid level and thermometer helps to visually display the oil temperature, ensuring the stability of the oil in oil tank 1. Oil tank 1 is connected to the oil supply circuit and the independent circulating cooling circuit 13, providing the oil source for the entire hydraulic station.

[0034] Oil supply circuit: Divided into oil outlet circuit 2 and oil return circuit 3, forming an oil circulation channel:

[0035] A variable displacement piston pump 4 and a main valve block 5 are connected in series on the oil outlet circuit 2. The variable displacement piston pump 4 is driven by a 15KW three-phase motor and can adjust the output flow according to the load requirements of the punching machine to adapt to high-speed punching conditions. The main valve block 5 is an integrated structure, which includes a first check valve 14 connected in series on the oil outlet circuit 2 (to prevent oil backflow and ensure stable oil outlet pressure) and an electromagnetic relief valve connected between the oil outlet circuit 2 and the return circuit 3 (to set the maximum rated pressure of the system to 190 bar and automatically release pressure when the system pressure is overloaded to protect hydraulic components).

[0036] The main valve block 5 is also equipped with a pressure gauge, a pressure gauge switch, and a pressure sensor with analog and digital functions: the pressure gauge is controlled to open and close via the pressure gauge switch, which is used to read the system pressure directly; the pressure sensor collects the pressure signal of oil circuit 2 in real time, and can transmit the signal to the punching machine control system to realize pressure abnormality alarm;

[0037] A return oil filter 15 is connected in series on the return oil line 3. The oil outlet of the return oil filter 15 is connected to the oil tank 1 to complete the filtration and recovery of oil.

[0038] Multiple sets of working cylinder circuits: connected in parallel between oil outlet circuit 2 and oil return circuit 3, corresponding to the support and punching functions of the punching machine, totaling 7 sets of circuits, specifically including:

[0039] The hydraulic cylinder circuit 6 is supported by: one end connected to the oil outlet circuit 2, and the other end connected to the oil return circuit 3. The circuit is connected in series with a 10-bore throttle valve 16, a 10-bore pressure reducing valve 17, a hydraulic check valve 18, and a solenoid directional valve 19.

[0040] Large-hole support cylinder circuit 7, small-hole support cylinder circuit 8, and half-hole support cylinder circuit 9: The three circuits have the same structure, and each is connected in series with pressure measuring valve block 20, universal throttle valve 16, universal pressure reducing valve 17, hydraulic check valve 18, and solenoid directional valve 19; each support circuit's pressure measuring valve block 20 is connected to a pressure sensor to monitor the support pressure in real time. When the pressure is abnormal, an alarm is triggered to ensure the safety of the support position.

[0041] Large-hole cutting cylinder circuit 10, small-hole cutting cylinder circuit 11, and half-hole cutting cylinder circuit 12: The three circuits have the same structure, and are connected in series with a universal throttle valve 16, a universal pressure reducing valve 17, a hydraulic check valve 18, and a solenoid directional valve 19. Each cutting circuit is connected in parallel with an accumulator 21 (1.0L capacity). The accumulator 21 can absorb the instantaneous impact generated by the cutting action, and at the same time supplement the pressure when the system pressure fluctuates, reduce the wear of hydraulic components, and extend the system life.

[0042] Independent circulating cooling circuit 13: Directly connected to oil tank 1, operating independently of the oil supply circuit, avoiding obstruction of the main oil flow and ensuring cooling efficiency.

[0043] The core power component of the circuit is a fixed displacement vane pump 22 (driven by a 2.2KW three-phase motor). The oil inlet of the fixed displacement vane pump 22 is connected to the oil tank 1, and the oil outlet is connected to the second check valve 23 (to prevent backflow of cooling circuit oil).

[0044] The oil outlet of the second check valve 23 is divided into two branches: one branch is connected in series with the air cooler 24 (model AH1680-CA3, which provides forced cooling for the oil) and the return oil filter 15 (which filters the cooled oil in the second stage), and the oil outlet of the return oil filter 15 is connected to the oil tank 1; the other branch is connected to the third check valve 25 (as an overflow branch, which releases pressure when the cooling circuit pressure is too high, protecting the air cooler 24 and the pipeline), and the oil outlet of the third check valve 25 is connected to the oil tank 1.

[0045] The working principle of this utility model is as follows: This utility model starts a three-phase motor to drive a variable displacement piston pump 4 to draw oil from the oil tank 1. After the oil is pressurized, it is delivered to the main valve block 5 via the oil outlet 2. The first check valve 14 inside the main valve block 5 prevents backflow of oil. According to the processing requirements of the punching machine, the control system controls the electromagnetic reversing valve 19 to operate. The oil from the oil outlet 2 then enters the main support cylinder circuit 6, the large-hole support cylinder circuit 7, the small-hole support cylinder circuit 8, and the half-hole support cylinder circuit 9 respectively.

[0046] Support position operation: After the oil speed is regulated by the throttle valve 16 and the pressure is stabilized by the pressure reducing valve 17, the oil cylinder is pushed out to achieve support positioning; the hydraulic control check valve 18 locks the position of the oil cylinder to prevent accidental retraction;

[0047] The pressure testing valve block 20 can detect the pressure of the support circuit on site. The pressure sensor monitors the pressure in real time. If the pressure is lower than the set value (such as 100 bar) or higher than the safety threshold, the control system will trigger an alarm and stop the punching action.

[0048] The cutting and pressing station operates as follows: After the support and positioning are completed, the control system controls the solenoid reversing valve 19 of the three cutting and pressing circuits to operate. The oil enters the cutting and pressing cylinder after passing through the throttle valve 16 and the pressure reducing valve 17, driving the cylinder to perform the punching action.

[0049] During the punching process, the accumulator 21 absorbs the instantaneous impact. When the system pressure drops, the accumulator 21 releases pressurized oil to replenish it, ensuring the punching force is stable. After punching is completed, the solenoid reversing valve 19 reverses, the oil cylinder retracts, and the oil returns to the oil tank 1 after being filtered through the return oil circuit 3 and the return oil filter 15.

[0050] Independent circulating cooling circuit 13 operates as follows: The three-phase motor is started, driving the fixed displacement vane pump 22 to draw oil from the oil tank 1. The oil is then divided into two paths via the second check valve 23:

[0051] It enters the air cooler 24 for cooling, and then passes through the return oil filter 15 before returning to the oil tank;

[0052] Another path returns to the oil tank via the third check valve 25 (overflow branch) to avoid overload of the cooling circuit pressure; the cooling circuit runs continuously to control the oil temperature within the range of 40-50℃.

[0053] All components mentioned in this article are general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods, so they will not be described in detail here.

[0054] While the specific embodiments of this utility model have been described in detail above, this utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this utility model. Modifications or variations that do not involve creative labor are still within the protection scope of this utility model.

Claims

1. A hydraulic station of a die-cutting machine, characterized in that, include: The oil tank (1) is connected to an oil supply circuit. The oil supply circuit is divided into an oil outlet circuit (2) and an oil return circuit (3). A variable displacement piston pump (4) and a main valve block (5) are connected in series on the oil outlet circuit (2). A return oil filter (15) is connected in series on the oil return circuit (3). Multiple sets of working cylinder circuits are connected in parallel between the oil outlet circuit (2) and the oil return circuit (3). The working cylinder circuits include a general upper support cylinder circuit (6), a large hole support cylinder circuit (7), a small hole support cylinder circuit (8), a half hole support cylinder circuit (9), a large hole pressure cutting cylinder circuit (10), a small hole pressure cutting cylinder circuit (11), and a half hole pressure cutting cylinder circuit (12). The hydraulic station also includes an independent circulating cooling circuit (13), which is connected to the oil tank (1).

2. The hydraulic station of a die-cutting machine according to claim 1, characterized in that: The main valve block (5) includes a first check valve (14) connected in series on the oil outlet (2) and an electromagnetic relief valve bridging the oil outlet (2) and the oil return (3); a pressure gauge and a pressure sensor are also installed on the main valve block (5); the pressure gauge is connected to the oil outlet (2) through a pressure gauge switch, and the pressure sensor is a pressure sensor with analog and digital functions.

3. The hydraulic station of a die-cutting machine according to claim 1, characterized in that: One end of the total support cylinder circuit (6) is connected to the oil outlet circuit (2), and the other end is connected to the oil return circuit (3); the total support cylinder circuit (6) includes a throttle valve (16), a pressure reducing valve (17), a hydraulic control check valve (18), and a solenoid directional valve (19) connected in series.

4. The hydraulic station for a punching machine according to claim 1, characterized in that: The large-hole support cylinder circuit (7), the small-hole support cylinder circuit (8), and the half-hole support cylinder circuit (9) all include a pressure measuring valve block (20), a throttle valve (16), a pressure reducing valve (17), a hydraulic check valve (18), and a solenoid directional valve (19) connected in series. The pressure measuring valve block (20) is connected to a pressure sensor.

5. The hydraulic station of a die-cutting machine according to claim 1, characterized in that: The large-hole cutting cylinder circuit (10), small-hole cutting cylinder circuit (11) and half-hole cutting cylinder circuit (12) all include a throttle valve (16), a pressure reducing valve (17), a hydraulic check valve (18), and a solenoid directional valve (19) connected in series.

6. A hydraulic station of a die-cutting machine according to claim 5, characterized in that: An accumulator (21) is connected in parallel to each of the large hole cutting cylinder circuit (10), the small hole cutting cylinder circuit (11), and the half hole cutting cylinder circuit (12).

7. The hydraulic station of a die-cutting machine according to claim 1, characterized in that: The independent circulating cooling circuit (13) includes: a fixed displacement vane pump (22) driven by a three-phase motor, the oil inlet of the fixed displacement vane pump (22) is connected to the oil tank (1), and the oil outlet is connected to a second check valve (23). The oil outlet of the second check valve (23) is divided into two branches. One branch is connected in series with an air cooler (24) and a return oil filter (15). The oil outlet of the return oil filter (15) is connected to the oil tank (1). The other branch is connected to a third check valve (25). The oil outlet of the third check valve (25) is connected to the oil tank (1).

8. The hydraulic station of a die-cutting machine according to claim 1, characterized in that: An air filter, a liquid level temperature sensor, and a liquid level thermometer are also installed on the oil tank (1).

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