A die changing mechanism and a press hydraulic station interconnection system

Abstract

The utility model relates to a die changing mechanism and press hydraulic station interconnection system for connecting die changing mechanism hydraulic station and press hydraulic station, die changing mechanism hydraulic station includes die changing oil feed pump, die changing oil tank and die changing reversing valve, and die changing oil feed pump is connected reversing valve through die changing oil inlet road, and oil tank is connected reversing valve through die changing oil return road, press hydraulic station includes press oil feed pump, press oil tank and press reversing valve, and press oil feed pump is connected press reversing valve through press oil inlet road, and press [oil tank is connected press reversing valve through press oil return road, and the system includes intercommunication oil inlet road and intercommunication oil return road, and the both ends of intercommunication oil inlet road are connected die changing oil inlet road and press oil inlet road respectively, and the both ends of intercommunication oil return road are connected die changing oil return road and press oil return road respectively, and the third manual valve is installed on intercommunication oil inlet road, and the fourth manual valve is installed on intercommunication oil return road. Compared with prior art, the utility model hydraulic station maintenance, fault does not need to stop, will not influence production rhythm.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts processing equipment, and in particular to an interconnection system between a mold changing mechanism and a press hydraulic station. Background Technology

[0002] Currently, in the automotive industry, the most common process line configuration for four-door and two-hood production lines to ensure rapid switching between multiple models is a press plus a mold-changing mechanism. The press is responsible for stamping and edge-sealing the four-door and two-hood panels, while the mold-changing mechanism is responsible for quickly switching the press molds to meet the needs of high-efficiency production. However, in actual applications, although both the press and the mold-changing mechanism use hydraulic drive, they are actually two independent systems.

[0003] In a high-frequency production environment, any malfunction in the hydraulic system of any equipment can cause immeasurable damage to production efficiency. While downtime for maintenance is a crucial guarantee for ensuring the continuous operation of equipment during actual production, it also means that a particular piece of equipment needs to be stopped, which will inevitably impact production. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, which has two independent hydraulic systems, requiring machine shutdown and affecting production rhythm when the system fails or is under maintenance, and to provide an interconnection system between the mold changing mechanism and the press hydraulic station.

[0005] The objective of this utility model can be achieved through the following technical solutions: An interconnection system between a mold changing mechanism and a press hydraulic station is provided for connecting the mold changing mechanism hydraulic station and the press hydraulic station. The mold changing mechanism hydraulic station includes a mold changing oil supply pump, a mold changing oil tank, and a mold changing directional valve. The mold changing oil supply pump is connected to the directional valve through a mold changing oil inlet circuit, and the oil tank is connected to the directional valve through a mold changing oil return circuit. The press hydraulic station includes a press oil supply pump, a press oil tank, and a press directional valve. The press oil supply pump is connected to the press directional valve through a press oil inlet circuit, and the press oil tank is connected to the press directional valve through a press oil return circuit. The system includes an interconnected inlet circuit and an interconnected return circuit. The two ends of the interconnected inlet circuit are respectively connected to the mold changing inlet circuit and the press inlet circuit, and the two ends of the interconnected return circuit are respectively connected to the mold changing return circuit and the press return circuit. A third manual valve is installed on the interconnected inlet circuit, and a fourth manual valve is installed on the interconnected return circuit.

[0006] Preferably, a second manual valve is installed on the mold changing return oil line, and the second manual valve is located between the connection point of the mold changing return oil line and the interconnection return oil line and the mold changing oil tank.

[0007] Preferably, a fifth manual valve is installed on the press return oil line, and the fifth manual valve is located between the connection between the press return oil line and the interconnected return oil line and the press oil tank.

[0008] Preferably, a first check valve is provided on the mold changing oil inlet line, and the inlet end of the first check valve is connected to the mold changing oil supply pump. A second check valve is provided on the press oil inlet line, and the inlet end of the second check valve is connected to the press changing oil supply pump.

[0009] Preferably, the mold changing oil inlet circuit is connected to a mold changing overflow valve, the mold changing overflow valve is connected to the mold changing oil supply pump through a normally open first manual valve, and the press oil inlet circuit and the press oil return circuit are connected to a press overflow valve.

[0010] Preferably, a limit switch is provided on one side of each of the third, fourth, second, fifth and first manual valves.

[0011] Preferably, the mold changing directional valve is connected to the hydraulic cylinder of the mold changing mechanism, and a mold changing balance valve is provided at the output end of the mold changing directional valve.

[0012] Preferably, the press reversing valve is connected to the press hydraulic cylinder, and a press balance valve is provided at the output end of the press reversing valve.

[0013] Preferably, the mold changing oil tank is equipped with a return oil filter and an air filter.

[0014] Preferably, the mold changing oil tank is equipped with a temperature sensor, and the mold changing oil tank is connected to a cooler.

[0015] Compared with the prior art, the present invention has the following advantages: (1) This solution connects the hydraulic station of the mold changing mechanism with the hydraulic station of the press through interconnected inlet and return oil lines. When one of them fails or is under maintenance, the manual valve on the interconnected inlet and return oil lines can be opened to supply oil from the normal system to the faulty or under-maintenance system, avoiding sudden production interruptions, reducing downtime losses under high-frequency production rhythms, and providing emergency backup. The structure is simple and easy to operate. Interconnection is achieved only by adding interconnected oil lines and manual valves. There is no need to make complex modifications to the original hydraulic system. It is compatible with the existing production line, does not interfere with the normal production rhythm, and avoids the setting of additional hydraulic systems, thus reducing costs.

[0016] (2) In this scheme, the second and fifth manual valves can precisely control the return oil path and work together with the interconnected return oil circuit to ensure that the hydraulic oil returns accurately to the oil supply tank during emergencies or maintenance, completely avoiding oil cross-contamination. The first and second check valves prevent the oil from flowing backward, doubly reinforcing the anti-cross-contamination defense line and ensuring the stability of the two systems when operating independently. The system safety is improved through multiple protection designs, and the simple structure does not increase the complexity of operation, perfectly adapting to the needs of high-efficiency production. Attached Figure Description

[0017] Figure 1 A schematic diagram of the hydraulic station for the mold changing mechanism provided by this utility model; Figure 2 This is a structural schematic diagram of the hydraulic station for the press provided by this utility model; Figure 3 Hydraulic schematic diagram of the mold changing mechanism provided by this utility model; Figure 4 Hydraulic schematic diagram of the press provided by this utility model; Figure 5 Hydraulic schematic diagram of the interconnection system between the mold changing mechanism and the press hydraulic station provided by this utility model; In the diagram: 1. Mold changing oil supply pump, 2. Mold changing oil tank, 3. Mold changing directional valve, 4. Mold changing oil inlet, 5. Mold changing oil return, 6. Press oil supply pump, 7. Press oil tank, 8. Press directional valve, 9. Press oil inlet, 10. Press oil return, 11. Interconnected oil inlet, 12. Interconnected oil return, 13. Third manual valve, 14. Fourth manual valve, 15. Second manual valve, 16. Fifth manual valve, 17. First check valve, 18. Second check valve, 19. First manual valve, 20. Mold changing mechanism hydraulic cylinder, 21. Mold changing balance valve, 22. Press hydraulic cylinder, 23. Press balance valve, 24. Return oil filter, 25. Air filter, 26. Temperature sensor, 27. Cooler, 28. Press overflow valve, 29. Mold changing overflow valve. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0023] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] Example 1 like Figure 5 As shown, this embodiment provides an interconnection system between a mold changing mechanism and a press hydraulic station, used to connect the mold changing mechanism hydraulic station and the press hydraulic station. The mold changing mechanism hydraulic station includes a mold changing oil supply pump 1, a mold changing oil tank 2, and a mold changing directional valve 3. The mold changing oil supply pump 1 is connected to the directional valve 3 through a mold changing oil inlet circuit 4, and the oil tank 2 is connected to the directional valve 3 through a mold changing oil return circuit 5. The press hydraulic station includes a press oil supply pump 6, a press oil tank 7, and a press directional valve 8. The press oil supply pump 6 is connected to the press hydraulic station through a mold changing oil inlet circuit 4. The press oil inlet 9 is connected to the press reversing valve 8, and the press oil tank 7 is connected to the press reversing valve 8 through the press return oil line 10. The system includes an interconnected oil inlet 11 and an interconnected oil return 12. The two ends of the interconnected oil inlet 11 are connected to the mold changing oil inlet 4 and the press oil inlet 9, respectively. The two ends of the interconnected oil return 12 are connected to the mold changing oil return 5 and the press return oil line 10, respectively. A third manual valve 13 is installed on the interconnected oil inlet 11, and a fourth manual valve 14 is installed on the interconnected oil return 12.

[0025] The hydraulic station of the mold changing mechanism is connected to the hydraulic station of the press through interconnected inlet and return oil lines. In the event of a malfunction or maintenance in either system, a manual valve on the interconnected inlet and return oil lines can be opened, allowing the normal system to supply oil to the faulty or under-maintenance system. This prevents sudden production interruptions, reduces downtime losses during high-frequency production, and provides emergency backup. The structure is simple and easy to operate, achieving interconnection only through the addition of interconnected oil lines and manual valves. No complex modifications to the existing hydraulic system are required, making it compatible with existing production lines and not disrupting normal production rhythms.

[0026] In this embodiment, a second manual valve 15 is installed on the mold change return oil circuit 5. The second manual valve is located between the connection point of the mold change return oil circuit 5 and the interconnecting return oil circuit 12 and the mold change oil tank 2. A fifth manual valve 16 is installed on the press return oil circuit 10. The fifth manual valve 16 is located between the connection point of the press return oil circuit 10 and the interconnecting return oil circuit 12 and the press oil tank 7. A first check valve 17 is provided on the mold change inlet oil circuit 4. The inlet end of the first check valve 17 is connected to the mold change oil supply pump 1. A second check valve 18 is provided on the press inlet oil circuit 9. The inlet end of the second check valve 18 is connected to the press change oil supply pump 6.

[0027] The second and fifth manual valves precisely control the return oil path, working in conjunction with the interconnected return oil circuit to ensure accurate return of hydraulic oil to the supply oil tank during emergencies or maintenance, completely preventing oil cross-contamination. The first and second check valves prevent reverse oil flow, providing a double layer of protection against cross-contamination and ensuring the stability of the two systems operating independently. Multiple protection designs enhance system safety, while the simple structure does not increase operational complexity, perfectly meeting the demands of high-efficiency production.

[0028] Furthermore, the mold changing oil inlet circuit 4 is connected to a mold changing overflow valve 29, which is connected to the mold changing oil supply pump 1 through a normally open first manual valve 19. The press oil inlet circuit 9 and the press oil return circuit 10 are connected to a press overflow valve 28.

[0029] Under normal conditions, the first manual valve 19 is normally open, allowing the mold-changing relief valve to control the pressure of the mold-changing mechanism. When the mold-changing mechanism is interconnected with the press hydraulic station, the first manual valve 19 is closed, and the pressure of the mold-changing mechanism is controlled by the relief valve on the press, preventing hydraulic oil from mixing and ensuring consistent and stable pressure in the interconnected system.

[0030] It needs to be clarified that to achieve interoperability, the hydraulic systems of the mold-changing mechanism and the press need to be modified. Interoperability of the hydraulic stations requires that the hydraulic oil grade be the same; and that the operating pressure of both the mold-changing mechanism and the press be below 15 MPa. It must be ensured that either hydraulic station can smoothly drive both mechanisms during interoperability, and that interoperability will not affect subsequent operation. Interoperability and interlocking in the oil circuits allow the mold-changing mechanism to supply oil to the press, or the press to supply oil to the hydraulic system, while simultaneously ensuring that the hydraulic oil returns to the supply tank, preventing cross-contamination of oil circuits.

[0031] In this embodiment, limit switches are provided on one side of the third manual valve 13, the fourth manual valve 14, the second manual valve 15, the fifth manual valve 16, and the first manual valve 19. These limit switches ensure that each manual valve is in the correct position and also serve as a check on the opening and closing of the valves in the entire interconnected circuit, ensuring the stable operation of the subsequent mold-changing mechanism hydraulic station or press hydraulic station.

[0032] In this embodiment, the mold changing directional valve 3 is connected to the hydraulic cylinder 20 of the mold changing mechanism, and a mold changing balance valve 21 is provided at the output end of the mold changing directional valve 3. The press directional valve 8 is connected to the press hydraulic cylinder 22, and a press balance valve 23 is provided at the output end of the press directional valve 8.

[0033] In this embodiment, the mold changing oil tank 2 is equipped with a return oil filter 24 and an air filter 25. The mold changing oil tank 2 is also equipped with a temperature sensor 26 and a cooler 27.

[0034] like Figures 1 to 4 As shown, specifically, the mold-changing mechanism body contains four hydraulic cylinders pressurized by the mold-changing mechanism hydraulic station to drive the intermediate lifting mechanism of the mold-changing mechanism, with a maximum output hydraulic pressure of 16 MPa. The press body contains one press hydraulic cylinder pressurized by the press hydraulic station for stamping the four door panels, with a maximum output pressure of 18 MPa. During normal operation, the mold-changing mechanism hydraulic station and the press hydraulic station work independently, providing hydraulic power to their respective equipment.

[0035] The hydraulic station for the mold changing mechanism mainly consists of components such as an oil tank, return oil filter, level switch, temperature sensor, motor, variable pump, vane pump, cooling pump, and air filter. Hydraulic oil for the mold changing mechanism's hydraulic cylinders is supplied by the mold changing mechanism's oil pump, and its flow is controlled by the oil block and directional valve. The pressure is maintained by the mold changing mechanism's balance valve, driving the hydraulic cylinders to move. The hydraulic station for the press mainly consists of components such as an oil tank, motor, variable pump, and vane pump. Hydraulic oil for the press's hydraulic cylinders is supplied by the press's oil pump, and its flow is controlled by the oil block and directional valve. The pressure is maintained by the press's balance valve, driving the press's hydraulic cylinders to move.

[0036] Of course, the mold changing mechanism and press are existing technologies and are not the focus of this application, so they will not be elaborated on further.

[0037] The specific working principle of the interconnection system: When the press hydraulic station provides power to the mold changing mechanism: Close the first manual valve 19 and the second manual valve 15 to prevent hydraulic oil from entering the mold changing mechanism's oil tank. Open the fifth manual valve 16 to allow the hydraulic oil from the mold changing mechanism to return to the press's oil tank.

[0038] Open the third manual valve 13 and the fourth manual valve 14.

[0039] After the above preparations are completed, the limit switch signals for each manual valve to be in position are triggered. After the PLC confirms that everything is correct, the oil pump of the compressor is started to supply oil.

[0040] When the hydraulic station of the mold changing mechanism provides power to the press: Open the first manual valve 19 and the second manual valve 15 to allow the press hydraulic oil to return to the mold changing tank. Close the fifth manual valve 16 to prevent hydraulic oil from the mold changing mechanism from entering the press tank. Open the third manual valve 13 and the fourth manual valve 14.

[0041] After the above preparations are completed, the limit switch signals for confirming that each manual valve is in the correct position are triggered. After PLC confirmation, the press oil pump is started to supply oil. This ensures that any hydraulic equipment can operate through another hydraulic system during anticipated maintenance or temporary malfunctions, guaranteeing continuous production. In practical applications, the press is a key piece of equipment on the production line and a critical workstation; therefore, the effective application of interconnectivity provides another effective guarantee for the press.

[0042] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A system for interconnecting a mold changing mechanism and a press hydraulic station, used to connect the mold changing mechanism hydraulic station and the press hydraulic station, wherein the mold changing mechanism hydraulic station includes a mold changing oil supply pump (1), a mold changing oil tank (2), and a mold changing directional valve (3), the mold changing oil supply pump (1) is connected to the directional valve (3) through a mold changing oil inlet (4), and the oil tank (2) is connected to the directional valve (3) through a mold changing oil return (5); the press hydraulic station includes a press oil supply pump (6), a press oil tank (7), and a press directional valve (8), the press oil supply pump (6) is connected to the press directional valve (8) through a press oil inlet (9), and the press oil tank (7) is connected to the press directional valve (8) through a press oil return (10), characterized in that, The system includes an interconnected oil inlet (11) and an interconnected oil return (12). The two ends of the interconnected oil inlet (11) are connected to the mold changing oil inlet (4) and the press oil inlet (9), respectively. The two ends of the interconnected oil return (12) are connected to the mold changing oil return (5) and the press oil return (10), respectively. A third manual valve (13) is installed on the interconnected oil inlet (11), and a fourth manual valve (14) is installed on the interconnected oil return (12).

2. The interconnection system between the mold changing mechanism and the press hydraulic station according to claim 1, characterized in that, A second manual valve (15) is installed on the mold change return oil circuit (5). The second manual valve is located between the mold change return oil circuit (5) and the interconnection return oil circuit (12) and the mold change oil tank (2).

3. The interconnection system between the mold changing mechanism and the press hydraulic station according to claim 2, characterized in that, A fifth manual valve (16) is installed on the press return oil circuit (10). The fifth manual valve (16) is located between the connection between the press return oil circuit (10) and the interconnection return oil circuit (12) and the press oil tank (7).

4. The interconnection system between the mold changing mechanism and the press hydraulic station according to claim 3, characterized in that, The mold changing oil inlet circuit (4) is provided with a first check valve (17), the inlet end of the first check valve (17) is connected to the mold changing oil supply pump (1), and the press oil inlet circuit (9) is provided with a second check valve (18), the inlet end of the second check valve (18) is connected to the press changing oil supply pump (6).

5. The interconnection system between the mold changing mechanism and the press hydraulic station according to claim 4, characterized in that, The mold changing oil inlet (4) is connected to a mold changing overflow valve. The mold changing overflow valve is connected to the mold changing oil supply pump (1) through a normally open first manual valve (19). The press oil inlet (9) and press oil return (10) are connected to a press overflow valve (28).

6. The interconnection system between the mold changing mechanism and the press hydraulic station according to claim 5, characterized in that, Limit switches are provided on one side of the third manual valve (13), the fourth manual valve (14), the second manual valve (15), the fifth manual valve (16), and the first manual valve (19).

7. The interconnection system between the mold changing mechanism and the press hydraulic station according to claim 1, characterized in that, The mold changing directional valve (3) is connected to the hydraulic cylinder (20) of the mold changing mechanism, and a mold changing balance valve (21) is set at the output end of the mold changing directional valve (3).

8. The interconnection system between the mold changing mechanism and the press hydraulic station according to claim 1, characterized in that, The press reversing valve (8) is connected to the press hydraulic cylinder (22), and a press balance valve (23) is set at the output end of the press reversing valve (8).

9. The interconnection system between the mold changing mechanism and the press hydraulic station according to claim 1, characterized in that, The mold changing oil tank (2) is equipped with an oil return filter (24) and an air filter (25).

10. The interconnection system between the mold changing mechanism and the press hydraulic station according to claim 1, characterized in that, The mold changing oil tank (2) is equipped with a temperature sensor (26), and the mold changing oil tank (2) is connected to a cooler (27).

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