Oil press lifting platform convenient and fast to adjust

Abstract

The utility model discloses an oil press lifting platform convenient and fast to adjust, which relates to the technical field of oil presses and comprises an oil press frame, an oil cylinder fixedly mounted at the top end of the oil press frame, a stand column in sliding fit with the inner wall of the oil press frame, a lifting platform and a platform speed adjusting structure. The lifting platform comprises a mounting plate fixedly mounted at the telescopic end of the oil cylinder, four through holes formed in the upper surface of the mounting plate in a rectangular array mode, guide columns slidably mounted on the inner walls of the four through holes correspondingly, pressing plates fixedly mounted at the lower ends of the guide columns, and baffles fixedly mounted at the upper ends of the guide columns. The platform speed adjusting structure is composed of an oil injection assembly arranged above the oil press frame. Compared with the prior art, the device has the beneficial effects that through cooperative control of the first oil filling pipe, the second oil filling pipe, the first flow regulating valve and the second flow regulating valve, the speed of the lifting platform can be conveniently and quickly regulated in stages, so that the efficiency and the forming precision can be considered at the same time.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic press technology, and in particular to a hydraulic press lifting platform that is convenient and quick to adjust. Background Technology

[0002] As a core forming device that uses hydraulic oil as the power medium and a hydraulic pump to drive the reciprocating motion of the cylinder / piston, the performance of a hydraulic press directly affects the processing efficiency and precision of stamping, forging, and other processes. In existing technologies, to avoid defects in parts after pressurization, the cylinder must descend and rise slowly and uniformly, thus affecting processing efficiency. To address these shortcomings, we propose a hydraulic press lifting platform that is easy and quick to adjust. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a convenient and quick-adjustable hydraulic press lifting platform.

[0004] To address the problems existing in the prior art, the present invention adopts the following technical solution:

[0005] A convenient and quick-adjustable hydraulic press lifting platform includes a hydraulic press frame, a hydraulic cylinder fixedly installed at the top of the hydraulic press frame, and a column slidably fitted on the inner wall of the hydraulic press frame. It also includes:

[0006] The lifting platform includes a mounting plate fixedly installed on the telescopic end of the hydraulic cylinder, four through holes arranged in a rectangular array on the upper surface of the mounting plate, guide columns slidably installed on the inner walls of the four through holes, a pressure plate fixedly installed on the lower end of the guide columns, and a baffle fixedly installed on the upper end of the guide columns.

[0007] The platform speed adjustment structure consists of an oil injection component disposed above the hydraulic press frame and a sensing component disposed on the upper surface of the mounting plate.

[0008] The oil injection assembly includes a first oil injection pipe and a second oil injection pipe that are fixedly installed at the oil inlet end of the oil cylinder, a first solenoid valve and a first flow regulating valve that are connected in series on the outer wall of the first oil injection pipe, and a second solenoid valve and a second flow regulating valve that are connected in series on the outer wall of the second oil injection pipe.

[0009] The sensing component includes a contact switch fixedly mounted on the upper surface of the mounting plate, and the contact switch is located directly below the baffle.

[0010] Preferably, the contact switch is used to control the opening and closing of the first solenoid valve and the second solenoid valve.

[0011] Preferably, the lower end of the column is fixedly connected to the upper surface of the mounting plate.

[0012] Preferably, the other end of the first and second oil injection pipes is connected to an oil delivery pipe, and the other end of the oil delivery pipe is connected to an external hydraulic system.

[0013] Preferably, the surface of the hydraulic press frame is provided with a strip groove, the inner wall of which is embedded with a drag chain, and the drag chain is provided with wires.

[0014] Preferably, one end of the wire is connected to the terminal block of the contact switch, and the other end is connected to the PLC module of the external hydraulic press control cabinet.

[0015] Preferably, the first flow regulating valve and the second flow regulating valve are proportional valves, and their opening degree is dynamically adjusted by the PLC module.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. Through the coordinated control of the first oil injection pipe, the second oil injection pipe, the first flow regulating valve, and the second flow regulating valve, the speed of the lifting platform can be adjusted in stages quickly and easily, thus balancing efficiency and forming accuracy.

[0018] 2. The contact switch and baffle trigger linkage mechanism, together with the PLC module, switch the state of the first solenoid valve and the second solenoid valve in real time. After the pressure plate contacts the workpiece, it can switch to low speed mode. At this time, the pressure plate and the guide column will move upward until the pressure plate contacts the mounting plate and then pressurizes the part, thereby reducing hydraulic shock. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention. The illustrative embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an undue limitation. In the drawings:

[0020] Figure 1 This is a three-dimensional first-view schematic diagram of the present invention;

[0021] Figure 2 This is a three-dimensional second-view schematic diagram of the present invention;

[0022] Figure 3 This is a cross-sectional view of the present invention;

[0023] Figure 4 for Figure 1 Enlarged structural diagram at point A in the middle;

[0024] Figure 5 for Figure 3 Enlarged structural diagram at point B.

[0025] The components in the diagram are numbered as follows: 10 Hydraulic press frame, 11 Hydraulic cylinder, 12 Column, 20 Mounting plate, 21 Guide column, 22 Pressure plate, 23 Baffle, 30 First oil injection pipe, 31 First solenoid valve, 32 First flow regulating valve, 40 Second oil injection pipe, 41 Second solenoid valve, 42 Second flow regulating valve, 50 Contact switch, 60 Oil delivery pipe, 70 Cable chain. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0027] Please see Figure 1-5 This utility model provides a technical solution: a hydraulic press lifting platform that is convenient and quick to adjust, including a hydraulic press frame 10, a hydraulic cylinder 11 fixedly installed at the top of the hydraulic press frame 10, a column 12 slidably fitted on the inner wall of the hydraulic press frame 10, and also includes a lifting platform and a platform speed adjustment structure.

[0028] The lifting platform includes a mounting plate 20 fixedly installed at the telescopic end of the hydraulic cylinder 11, four through holes arranged in a rectangular array on the upper surface of the mounting plate 20, guide columns 21 slidably installed on the inner walls of the four through holes, a pressure plate 22 fixedly installed at the lower end of the guide columns 21, and a baffle 23 fixedly installed at the upper end of the guide columns 21. The lower end of the column 12 is fixedly connected to the upper surface of the mounting plate 20. The guide columns 21 can slide within the through holes of the mounting plate 20 and guide the movement trajectory of the pressure plate 22. When the hydraulic cylinder 11 extends, it can drive the pressure plate 22 and the mounting plate 20 to move synchronously.

[0029] The platform speed adjustment structure consists of an oil injection assembly mounted above the hydraulic press frame 10 and a sensing assembly mounted on the upper surface of the mounting plate 20. The oil injection assembly includes a first oil injection pipe 30 and a second oil injection pipe 40, which are respectively fixedly installed at the oil inlet end (upper cavity) of the hydraulic cylinder 11. A first solenoid valve 31 and a first flow regulating valve 32 are connected in series on the outer wall of the first oil injection pipe 30, and a second solenoid valve 41 and a second flow regulating valve 42 are connected in series on the outer wall of the second oil injection pipe 40. The lower cavity of the hydraulic cylinder 11 is connected to the return oil system through an external return oil pipe. The first flow regulating valve 32 and the second flow regulating valve 42 are proportional valves, and their opening degree is dynamically adjusted by the PLC module. The other end of the first oil injection pipe 30 and the second oil injection pipe 40 is connected to an oil delivery pipe 60, and the other end of the oil delivery pipe 60 is connected to an external hydraulic system.

[0030] The sensing component includes a contact switch 50 fixedly mounted on the upper surface of the mounting plate 20, and the contact switch 50 is located directly below the baffle 23. The contact switch 50 is used to control the opening and closing of the first solenoid valve 31 and the second solenoid valve 41. The weight of the pressure plate 22 can drive the baffle 23 to contact the contact switch 50. When the PLC opens the first solenoid valve 31, the second solenoid valve 41 is closed. Hydraulic oil enters the upper chamber of the cylinder 11 quickly through the first oil injection pipe 30, which can drive the mounting plate 20 to move the pressure plate 22 down quickly. When the PLC opens the second solenoid valve 41, the first solenoid valve 31 is closed. Hydraulic oil enters the upper chamber of the cylinder 11 slowly through the second oil injection pipe 40, which can drive the mounting plate 20 to move the pressure plate 22 down slowly. Through the coordinated control of the first oil injection pipe 30, the second oil injection pipe 40 and the first flow regulating valve 32 and the second flow regulating valve 42, the speed of the lifting platform can be adjusted in stages quickly and easily, thus balancing efficiency and forming accuracy.

[0031] The surface of the hydraulic press frame 10 is provided with a strip groove, and a cable chain 70 is embedded in the inner wall of the strip groove. The cable chain 70 is equipped with wires, one end of which is connected to the terminal of the contact switch 50, and the other end is connected to the PLC module of the external hydraulic press control cabinet. The cable chain 70 is made of engineering plastic material, which can guide the movement trajectory of the wires and avoid the wires from becoming messy.

[0032] The PLC opens the first solenoid valve 31 and closes the second solenoid valve 41. Hydraulic oil is injected rapidly into the upper chamber of the cylinder 11 through the first oil injection pipe 30 at a high flow rate. The piston rod of the cylinder 11 pushes the mounting plate 20 and the guide column 21 to move down synchronously. The pressure plate 22 approaches the workpiece at high speed. When the pressure plate 22 contacts the workpiece, it moves upward. The baffle 23 rises with the pressure plate 22 and disengages from the contact switch 50 to generate an electrical signal. The PLC immediately closes the first solenoid valve 31 and opens the second solenoid valve 41. The hydraulic oil is switched to the second oil injection pipe 40. The second flow regulating valve 42 dynamically adjusts its opening according to the preset pressure to reduce the oil supply flow. At this time, the speed of the pressure plate 22 decreases sharply. When the pressure plate 22 contacts the mounting plate 20, it can be limited and the workpiece can be processed using the pressure plate 22.

[0033] The triggering linkage mechanism between the contact switch 50 and the baffle 23, in conjunction with the PLC module, switches the state of the first solenoid valve 31 and the second solenoid valve 41 in real time. After the pressure plate 22 contacts the workpiece, it can switch to a low-speed mode. At this time, the pressure plate 22 will move upward with the guide column 21 until the pressure plate 22 contacts the mounting plate 20 before pressurizing the part, thereby reducing hydraulic shock.

[0034] Specifically, the working principle and operation method of this utility model are as follows:

[0035] Power input: The PLC opens the first solenoid valve 31 and closes the second solenoid valve 41, and the hydraulic oil is injected into the upper chamber of the cylinder 11 at a high flow rate through the first oil injection pipe 30.

[0036] Motion transmission: The piston rod of the hydraulic cylinder 11 pushes the mounting plate 20 and the guide column 21 to move down synchronously, and the pressure plate 22 approaches the workpiece at high speed;

[0037] Guiding constraint: The guide post 21 and the through hole of the mounting plate 20 form a sliding pair to suppress the deflection of the pressure plate 22.

[0038] Contact sensing: When the pressure plate 22 contacts the workpiece, the pressure plate 22 will move upward under force and contact the mounting plate 20. The baffle 23 will rise with the pressure plate 22 and disengage from the contact switch 50, generating an electrical signal.

[0039] Signal transmission: The signal is transmitted to the PLC module in real time via cable chain 70;

[0040] Oil circuit switching: The PLC immediately closes the first solenoid valve 31 and opens the second solenoid valve 41, and the hydraulic oil is switched to the second oil injection pipe 40;

[0041] Flow regulation: The second flow regulating valve 42 dynamically adjusts its opening according to the preset pressure, and the speed of the pressure plate 22 decreases sharply;

[0042] Forming control: The low-speed stage continues until the pressure plate 22 is fully pressed together;

[0043] Quick return: When the hydraulic cylinder 11 returns, the first oil injection pipe 30 is activated again, the drive mounting plate 20 is quickly reset, and the cable chain 70 guide wires are folded accordingly to prevent wear.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art based on the technical solution and concept of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic press lifting platform that is easy and quick to adjust, comprising a hydraulic press frame (10), a hydraulic cylinder (11) fixedly installed at the top of the hydraulic press frame (10), and a column (12) slidably fitted on the inner wall of the hydraulic press frame (10), characterized in that, Also includes: The lifting platform includes a mounting plate (20) fixedly installed on the telescopic end of the oil cylinder (11), four through holes arranged in a rectangular array on the upper surface of the mounting plate (20), guide columns (21) slidably installed on the inner walls of the four through holes, a pressure plate (22) fixedly installed on the lower end of the guide column (21), and a baffle (23) fixedly installed on the upper end of the guide column (21). The platform speed adjustment structure consists of an oil injection component disposed above the hydraulic press frame (10) and a sensing component disposed on the upper surface of the mounting plate (20). The oil injection assembly includes a first oil injection pipe (30) and a second oil injection pipe (40) respectively fixedly installed at the oil inlet end of the oil cylinder (11), a first solenoid valve (31) and a first flow regulating valve (32) connected in series on the outer wall of the first oil injection pipe (30), and a second solenoid valve (41) and a second flow regulating valve (42) connected in series on the outer wall of the second oil injection pipe (40). The sensing component includes a contact switch (50) fixedly mounted on the upper surface of the mounting plate (20), and the contact switch (50) is located directly below the baffle (23).

2. The hydraulic press lifting platform that is convenient and quick to adjust according to claim 1, characterized in that: The contact switch (50) is used to control the opening and closing of the first solenoid valve (31) and the second solenoid valve (41).

3. The hydraulic press lifting platform that is convenient and quick to adjust according to claim 1, characterized in that: The lower end of the column (12) is fixedly connected to the upper surface of the mounting plate (20).

4. The hydraulic press lifting platform that is convenient and quick to adjust according to claim 1, characterized in that: The other end of the first oil injection pipe (30) and the second oil injection pipe (40) is connected to an oil delivery pipe (60), and the other end of the oil delivery pipe (60) is connected to an external hydraulic system.

5. The hydraulic press lifting platform that is convenient and quick to adjust according to claim 1, characterized in that: The surface of the hydraulic press frame (10) is provided with a strip groove, and a drag chain (70) is embedded in the inner wall of the strip groove. The drag chain (70) is provided with wires.

6. The hydraulic press lifting platform that is convenient and quick to adjust according to claim 5, characterized in that: One end of the wire is connected to the terminal block of the contact switch (50), and the other end is connected to the PLC module of the external hydraulic press control cabinet.

7. The hydraulic press lifting platform that is convenient and quick to adjust according to claim 1, characterized in that: The first flow regulating valve (32) and the second flow regulating valve (42) are proportional valves, and their opening degree is dynamically adjusted by the PLC module.

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