A press hydraulic synchronizing device

Abstract

The utility model discloses a press hydraulic synchronous device, include: oil inlet solenoid valve and oil return solenoid valve, pressure reducing valve, first oil inlet check valve, second oil inlet check valve, first oil return check valve, second oil return check valve and first synchronous oil cylinder, second synchronous oil cylinder, the output of first synchronous oil cylinder, second synchronous oil cylinder is connected with the both ends of press movable crossbeam, the upper chamber of first synchronous oil cylinder is connected with the lower chamber of second synchronous oil cylinder through first synchronous oil pipe, and the lower chamber of first synchronous oil cylinder is connected with the upper chamber of second synchronous oil cylinder through second synchronous oil pipe. The utility model effectively improved synchronous performance and stability.

Description

Technical Field

[0001] This utility model relates to the field of press technology, and in particular to a hydraulic synchronization device for presses. Background Technology

[0002] During production, the press uses a lifting cylinder to push the movable crossbeam upwards, which then closes with the fixed crossbeam. Because the loads at both ends of the movable crossbeam differ significantly, their synchronicity during lifting is poor, with one end moving faster than the other. This asynchrony affects normal production and causes the cylinder's seals to be subjected to unbalanced stress, shortening their service life.

[0003] Existing technologies utilize mechanical synchronizing gear and rack mechanisms for drive, but the synchronization effect is poor and prone to jamming. Additionally, some technologies use throttle valves to control the oil flow rate of the lifting cylinder, but the synchronization performance remains unsatisfactory.

[0004] The synchronization of the press's moving crossbeam is difficult to adjust in actual use. Even if it is adjusted to a relatively ideal state in a short time, its stability is still not ideal, and the problem of asynchrony will still occur after a long period of use.

[0005] Therefore, through beneficial exploration and research, the applicant has found a solution to the above problems, and the technical solution to be introduced below is the result of this research. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a hydraulic synchronization device for presses with good synchronization performance and good stability, in order to overcome the shortcomings of the existing technology.

[0007] The technical problem to be solved by this utility model can be achieved by the following technical solution: A hydraulic synchronization device for a press, comprising: The system includes an inlet solenoid valve and a return solenoid valve. The inlet port of the inlet solenoid valve is connected to the inlet port of the hydraulic oil tank, and its return port is connected to the return port of the hydraulic oil tank. The outlet port and return port of the return solenoid valve are respectively connected to the return port of the hydraulic oil tank. A pressure reducing valve, wherein the oil inlet of the pressure reducing valve is connected to the oil outlet of the oil inlet solenoid valve, and its pressure reducing port is connected to the oil return port of the hydraulic oil tank. A first oil inlet check valve and a second oil inlet check valve, wherein the oil inlets of the first oil inlet check valve and the second oil inlet check valve are respectively connected to the oil outlet of the pressure reducing valve; A first return oil check valve and a second return oil check valve, wherein the oil outlets of the first and second return oil check valves are respectively connected to the oil inlet of the return oil solenoid valve; and A first synchronous cylinder and a second synchronous cylinder are connected at their output ends to both ends of the press's movable crossbeam. The upper chamber of the first synchronous cylinder is connected to the lower chamber of the second synchronous cylinder via a first synchronous oil pipe, and the lower chamber of the first synchronous cylinder is connected to the upper chamber of the second synchronous cylinder via a second synchronous oil pipe. The outlet of the first inlet check valve and the inlet of the first return check valve are connected in parallel to the first synchronous oil pipe, and the outlet of the second inlet check valve and the inlet of the second return check valve are connected in parallel to the second synchronous oil pipe.

[0008] In a preferred embodiment of the present invention, a pressure sensor is further included, which is installed on the pipeline between the return oil solenoid valve and the first return oil check valve and the second return oil check valve.

[0009] In a preferred embodiment of the present invention, a safety valve is further included. The oil inlet of the safety valve is connected to the pipeline between the return solenoid valve and the first return check valve and the second return check valve, and its oil outlet is connected to the return port of the hydraulic oil tank.

[0010] In a preferred embodiment of this utility model, it further includes a first single-point pressure measuring component and a second single-point pressure measuring component. The first single-point pressure measuring component includes a first pressure measuring short pipe and a first shut-off valve. One end of the first pressure measuring short pipe is connected to the pipeline between the first oil inlet check valve, the first oil return check valve and the first synchronous oil pipe. The first shut-off valve is installed on the first pressure measuring short pipe. The second single-point pressure measuring component includes a second pressure measuring short pipe and a second shut-off valve. One end of the second pressure measuring short pipe is connected to the pipeline between the second oil inlet check valve, the second oil return check valve and the second synchronous oil pipe. The second shut-off valve is installed on the second pressure measuring short pipe.

[0011] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: by adding two synchronous oil cylinders and forming two sealed cavities between the two synchronous oil cylinders, this utility model effectively improves the synchronization performance and stability. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0014] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0015] See Figure 1 The figure shows a hydraulic synchronization device for a press, including an inlet solenoid valve 100a, a return solenoid valve 100b, a pressure reducing valve 200, inlet check valves 300a and 300b, return check valves 400a and 400b, and synchronization cylinders 500a and 500b.

[0016] The inlet port of the inlet solenoid valve 100a is connected to the inlet port P of the hydraulic oil tank, and its return port is connected to the return port T of the hydraulic oil tank. The outlet port and return port of the return solenoid valve 100b are respectively connected to the return port T of the hydraulic oil tank.

[0017] The inlet of the pressure reducing valve 200 is connected to the outlet of the inlet solenoid valve 100a, and its pressure reducing port is connected to the return port T of the hydraulic oil tank. The pressure of the sealed cavity between the synchronous cylinders 500a and 500b is set by the pressure reducing valve 200.

[0018] The oil inlets of the oil inlet check valves 300a and 300b are connected to the oil outlet of the pressure reducing valve 200, respectively. The oil inlet check valves 300a and 300b are used to ensure that the two sealed cavities between the synchronous cylinders 500a and 500b do not interfere with each other.

[0019] The oil outlets of return oil check valves 400a and 400b are connected to the oil inlet of return oil solenoid valve 100b, respectively.

[0020] The output ends of synchronous cylinders 500a and 500b are connected to both ends of the movable crossbeam 10 of the press. The upper chamber of synchronous cylinder 500a is connected to the lower chamber of synchronous cylinder 500b through synchronous oil pipe 510a, and the lower chamber of synchronous cylinder 500a is connected to the upper chamber of synchronous cylinder 500b through synchronous oil pipe 510b. The oil outlet of oil inlet check valve 300a and the oil inlet of oil return check valve 400a are connected in parallel to synchronous oil pipe 510a. The oil outlet of oil inlet check valve 300b and the oil inlet of oil return check valve 400b are connected in parallel to synchronous oil pipe 510b.

[0021] The hydraulic synchronization device for the press of this utility model also includes a pressure sensor 600, which is installed on the pipeline between the return oil solenoid valve 100b and the return oil check valves 400a and 400b. When the pressure sensor 600 detects that the pressure in the sealed cavity is lower than the lower limit, hydraulic oil is added through the inlet solenoid valve 100a; when the pressure sensor 600 detects that the pressure in the sealed cavity is higher than the upper limit, hydraulic oil is released through the return oil solenoid valve 100b.

[0022] The hydraulic synchronization device for the press of this utility model also includes a safety valve 700. The oil inlet of the safety valve 700 is connected to the pipeline between the return solenoid valve 100b and the return check valves 400a and 400b, and its oil outlet is connected to the return port T of the hydraulic oil tank. The safety valve 700 can ensure the maximum pressure of the two sealed cavities between the synchronization cylinders 500a and 500b. If the maximum pressure is exceeded, the hydraulic oil is released, which plays a role in overpressure safety protection. In addition, the hydraulic oil can be released through the safety valve 700 during maintenance.

[0023] The hydraulic synchronization device for the press of this utility model also includes single-point pressure measuring components 800a and 800b. Single-point pressure measuring component 800a includes a pressure measuring short pipe 810a and a shut-off valve 820a. One end of the pressure measuring short pipe 810a is connected to the pipeline between the inlet check valve 300a, the return check valve 400a, and the synchronization oil pipe 510a. The shut-off valve 820a is installed on the pressure measuring short pipe 810a. Single-point pressure measuring component 800b includes a pressure measuring short pipe 810b and a shut-off valve 820b. One end of the pressure measuring short pipe 810b is connected to the pipeline between the inlet check valve 300b, the return check valve 400b, and the synchronization oil pipe 510b. The shut-off valve 820b is installed on the pressure measuring short pipe 810b. When single-point pressure measurement is required, the pressure measuring device is connected to the other end of the pressure measuring short tube 810a or 810b, and the shut-off valve 820a or 820b is opened to measure the pressure at a single point.

[0024] The working principle of the hydraulic synchronization device for the press of this utility model is as follows: Hydraulic oil passes through inlet solenoid valve 100a and pressure reducing valve 200, with the outlet pressure of pressure reducing valve 200 maintained at 100 bar. The upper chamber of synchronizing cylinder 500a is connected to the lower chamber of synchronizing cylinder 500b via synchronizing oil pipe 510a, forming a sealed cavity with an initial pressure set at 100 bar. The lower chamber of synchronizing cylinder 500a is also connected to the upper chamber of synchronizing cylinder 500b via synchronizing oil pipe 510b, forming another sealed cavity. Since hydraulic oil is difficult to compress, the amount of compression has a negligible impact on synchronicity.

[0025] When lifting cylinders 30a and 30b are lifted, the movable crossbeam 10 moves upward toward the fixed crossbeam 20, driving the piston rods of the synchronizing cylinders 500a and 500b to move upward. Since the upper chamber of the synchronizing cylinder 500a and the lower chamber of the synchronizing cylinder 500b are closed cavities filled with hydraulic oil, the hydraulic oil squeezed out of the upper chamber of the synchronizing cylinder 500a completely enters the lower chamber of the synchronizing cylinder 500b, thereby ensuring the synchronization of the pistons of the lifting cylinders 30a and 30b. Similarly, when the lifting cylinders 30a and 30b descend, the movable crossbeam 10 moves downward away from the fixed crossbeam 20, causing the piston rods of the synchronizing cylinders 500a and 500b to move upward. The lower chamber of the synchronizing cylinder 500a and the upper chamber of the synchronizing cylinder 500b are sealed cavities filled with hydraulic oil. The hydraulic oil squeezed out from the lower chamber of the synchronizing cylinder 500a completely enters the upper chamber of the synchronizing cylinder 500b, thereby ensuring the synchronization of the pistons of the lifting cylinders 30a and 30b.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A hydraulic synchronization device for a press, characterized in that, include: The system includes an inlet solenoid valve and a return solenoid valve. The inlet port of the inlet solenoid valve is connected to the inlet port of the hydraulic oil tank, and its return port is connected to the return port of the hydraulic oil tank. The outlet port and return port of the return solenoid valve are respectively connected to the return port of the hydraulic oil tank. A pressure reducing valve, wherein the oil inlet of the pressure reducing valve is connected to the oil outlet of the oil inlet solenoid valve, and its pressure reducing port is connected to the oil return port of the hydraulic oil tank. A first oil inlet check valve and a second oil inlet check valve, wherein the oil inlets of the first oil inlet check valve and the second oil inlet check valve are respectively connected to the oil outlet of the pressure reducing valve; A first return oil check valve and a second return oil check valve, wherein the oil outlets of the first and second return oil check valves are respectively connected to the oil inlet of the return oil solenoid valve; and A first synchronous cylinder and a second synchronous cylinder are connected at their output ends to both ends of the press's movable crossbeam. The upper chamber of the first synchronous cylinder is connected to the lower chamber of the second synchronous cylinder via a first synchronous oil pipe, and the lower chamber of the first synchronous cylinder is connected to the upper chamber of the second synchronous cylinder via a second synchronous oil pipe. The outlet of the first inlet check valve and the inlet of the first return check valve are connected in parallel to the first synchronous oil pipe, and the outlet of the second inlet check valve and the inlet of the second return check valve are connected in parallel to the second synchronous oil pipe.

2. The hydraulic synchronization device for the press as described in claim 1, characterized in that, It also includes a pressure sensor, which is installed on the pipeline between the return oil solenoid valve and the first return oil check valve and the second return oil check valve.

3. The hydraulic synchronization device for the press as described in claim 1, characterized in that, It also includes a safety valve, the inlet of which is connected to the pipeline between the return solenoid valve and the first return check valve and the second return check valve, and its outlet is connected to the return port of the hydraulic oil tank.

4. The hydraulic synchronization device for the press as described in claim 1, characterized in that, It also includes a first single-point pressure measuring component and a second single-point pressure measuring component. The first single-point pressure measuring component includes a first pressure measuring short pipe and a first shut-off valve. One end of the first pressure measuring short pipe is connected to the pipeline between the first inlet check valve, the first return check valve and the first synchronous oil pipe. The first shut-off valve is installed on the first pressure measuring short pipe. The second single-point pressure measuring component includes a second pressure measuring short pipe and a second shut-off valve. One end of the second pressure measuring short pipe is connected to the pipeline between the second inlet check valve, the second return check valve and the second synchronous oil pipe. The second shut-off valve is installed on the second pressure measuring short pipe.

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