Knockout numerical control electrically-controlled hydraulic control system

Abstract

The utility model provides a knockout numerical control electronic speed controller hydraulic control system which comprises a cylinder body installed on a knockout machine, the cylinder body is provided with an installation face and a cavity communicated with the installation face, a valve element is arranged in the cavity, and the cavity is communicated with a hydraulic oil channel; the spring is arranged between the mounting surface and the valve core; the cartridge valve numerical control regulator is installed on the installation face and comprises a pilot valve and a limiting rod, the pilot valve is located outside the installation face, one end of the limiting rod is connected with the pilot valve, and the other end of the limiting rod extends into the cavity and abuts against the valve element; a limiting mechanism is arranged in the pilot valve, the limiting mechanism is used for controlling the stroke of the limiting rod, the stroke of the limiting rod limits the moving stroke of the valve element in the cavity, the moving stroke of the valve element controls the on-off area of the cavity and the hydraulic oil channel, and then the flow of hydraulic oil is controlled.

Description

Technical Field

[0001] The utility model is related to the field of die-casting machines, especially a numerical control electric regulation hydraulic control system for feeding. Background Art

[0002] In recent years, with the progress of technology and the continuous improvement of industrial automation level, die-casting machine technology has also made great progress, especially the pressure regulation technology of the injection mechanism. Traditional die-casting machines mainly use handwheels to adjust the pressure of the injection mechanism, which has problems such as inconvenient operation, low control accuracy, and potential safety hazards. To solve these problems, various new pressure regulation technologies for injection mechanisms have emerged in recent years, such as electro-hydraulic proportional control technology, servo drive technology, etc. These technologies can achieve precise control of the pressure of the injection mechanism, improve die-casting quality, and reduce production costs.

[0003] In the prior art, for example, the Chinese utility model patent document CN218555524U (hereinafter referred to as "Document 1") discloses an injection system, which includes a cylinder block, a stamping part, an oil supply pipeline group, and a speed control component. The speed control component includes a control valve and a sensor capable of detecting the speed and / or pressure of the stamping part. The control valve can adjust the oil pressure in the cylinder block. This system performs real-time detection and adjustment of the movement of the stamping part through the speed control component to maintain the uniform movement of the stamping part.

[0004] However, the internal structure of the cylinder block in Document 1 is complex, increasing the manufacturing difficulty and cost: the speed control component of this solution is arranged inside the cylinder block, including multiple oil inlet channels, return channels, push rods, and cavities for accommodating the push rods and other mechanisms. Since these mechanisms are distributed in a small area inside the cylinder block and have complex shapes, the processing, assembly, and debugging are extremely difficult, requiring high-precision processing equipment and technical personnel, thus increasing the manufacturing cost. The multiple channels and cavities inside the cylinder block need to be precisely processed to ensure the circulation of hydraulic oil and control accuracy. These channels and cavities often have small sizes and complex shapes, with high processing difficulty and high requirements for processing equipment and processes. The multiple components inside the cylinder block need to be precisely assembled to ensure its sealing performance and functionality. Due to the small space, large number of components, and high assembly accuracy requirements, the technical level and assembly efficiency of workers are required to be high. Summary of the Utility Model

[0005] The utility model provides a numerical control electric regulation hydraulic control system for feeding, aiming to solve the problems of high manufacturing difficulty and high cost caused by the complex internal structure of the cylinder block in the prior art

[0006] The utility model solves the above technical problems through the following technical solutions:

[0007] A feeding numerical control electro-hydraulic control system, comprising: a cylinder body installed on a feeder, the cylinder body is provided with a mounting surface and a cavity communicating with the mounting surface, a spool is arranged in the cavity, and the cavity is communicated with a hydraulic oil passage; a spring arranged between the mounting surface and the spool; an inserted valve numerical control regulator installed on the mounting surface, the inserted valve numerical control regulator includes a pilot valve and a limit rod, the pilot valve is located outside the mounting surface, one end of the limit rod is connected to the pilot valve, and the other end extends into the cavity; a limit mechanism is arranged in the pilot valve, the limit mechanism is used to control the stroke of the limit rod, the stroke of the limit rod limits the moving stroke of the spool in the cavity, and the moving stroke of the spool controls the on-off area between the cavity and the hydraulic oil passage, thereby controlling the flow rate of the hydraulic oil.

[0008] Preferably, the limit mechanism includes a servo motor, a lead screw and a transmission mechanism, the servo motor drives the lead screw to move, and the lead screw drives the transmission mechanism to change the stroke of the limit rod. By using the method of driving the lead screw by a servo motor, the stroke of the limit rod can be accurately controlled, so as to realize the accurate control of the hydraulic oil flow rate and improve the control accuracy of the system.

[0009] Preferably, the transmission mechanism includes a nut threadedly connected to the lead screw and a reduction mechanism arranged between the nut and the limit rod. By reducing the driving torque of the servo motor through the reduction mechanism, a servo motor with a smaller power can be used, thereby reducing the cost and power consumption of the system.

[0010] Preferably, a servo drive circuit and a control circuit are integrated inside the inserted valve numerical control regulator, the servo drive circuit is used to drive the servo motor, and the control circuit is used to receive an external control signal and control the servo drive circuit. Integrating the servo drive circuit and the control circuit inside the inserted valve numerical control regulator simplifies the structure of the system and improves the reliability and stability of the system.

[0011] Preferably, the control circuit is provided with a 485 bus interface for communicating with an external control system. Using the 485 bus as an external control interface can realize remote control and data transmission between the system and the upper computer, which facilitates the integration and management of the system.

[0012] Preferably, the pilot valve can be opened when the system pressure exceeds a preset value, so that the cavity is communicated with the oil return pipeline to reduce the system pressure. The setting of the pilot valve can play a protective role when the system pressure is too high, prevent dangerous situations caused by too high system pressure, and improve the safety of the system.

[0013] Preferably, the control circuit can memorize the stroke of the limit rod in the case of power failure and control the limit rod to return to the memorized stroke position after power-on. Being able to memorize the stroke of the limit rod in the case of power failure and automatically return to the memorized position after power-on can compensate for mechanical wear, improve the repeated positioning accuracy of the system, and reduce the difficulty of manual operation.

[0014] By arranging the pilot valve outside the cylinder block and integrating the limit mechanism into the cartridge valve numerical control regulator, the present utility model simplifies the internal structure of the cylinder block, reduces the number of internal parts of the cylinder block and the processing difficulty, and reduces the requirement for processing accuracy, thus effectively solving the problems of high manufacturing difficulty and high cost caused by the complex internal structure of the cylinder block in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a feeding numerical control electro-hydraulic control system according to an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The embodiments of the present utility model will be described in detail below with reference to the drawings.

[0017] The present utility model provides a feeding numerical control electro-hydraulic control system, aiming to solve the problems of high manufacturing difficulty and high cost caused by the complex internal structure of the cylinder block in the prior art.

[0018] Figure 1 is a schematic structural diagram of a feeding numerical control electro-hydraulic control system according to an embodiment of the present utility model. As Figure 1 shown, the feeding numerical control electro-hydraulic control system includes a cylinder block 2 installed on a feeder 1. The cylinder block 2 is provided with a mounting surface 3 and a cavity 4 communicating with the mounting surface 3. A spool 5 is arranged in the cavity 4, and the cavity 4 is communicated with a hydraulic oil passage 6.

[0019] A spring 7 is arranged between the mounting surface 3 and the spool 5. The spring 7 can be a compression spring, and its pre-tightening force can be adjusted according to actual needs to ensure that the spool 5 can reliably block the hydraulic oil passage 6 when there is no hydraulic pressure.

[0020] An cartridge valve numerical control regulator 8 is also installed on the mounting surface 3. The cartridge valve numerical control regulator 8 includes a pilot valve 9 and a limit rod 10.

[0021] The pilot valve 9 is located outside the mounting surface 3 and can be controlled by an electric signal. For example, it can be controlled by a proportional valve or a servo valve.

[0022] One end of the limit rod 10 is connected to the pilot valve 9, and the other end extends into the cavity 4 and abuts against the spool 5. The material of the limit rod 10 can be selected as high-strength alloy steel to ensure its reliable operation in a high-pressure environment.

[0023] The pilot valve 9 is internally provided with a limit mechanism, and the limit mechanism is used to control the stroke of the limit rod 10. The stroke of the limit rod 10 limits the moving stroke of the spool 5 in the cavity 4, and the moving stroke of the spool 5 controls the on-off area between the cavity 4 and the hydraulic oil passage 6, thereby controlling the flow rate of the hydraulic oil.

[0024] In this embodiment, the limit mechanism includes a servo motor, a lead screw, and a transmission mechanism (not shown in the figure). The servo motor drives the lead screw to move, and the lead screw drives the transmission mechanism to change the stroke of the limit rod 10. By adopting the method of driving the lead screw with a servo motor, the stroke of the limit rod 10 can be accurately controlled, thereby realizing the accurate control of the hydraulic oil flow rate and improving the control accuracy of the system.

[0025] As a preferred technical solution, the transmission mechanism may include a nut threadedly connected to the lead screw and a reduction mechanism (not shown in the figure) provided between the nut and the limit rod 10. The reduction mechanism can adopt, for example, a gear reducer or a worm and worm gear reducer, etc. By reducing the driving torque of the servo motor through the reduction mechanism, a servo motor with a smaller power can be used, thereby reducing the cost and power consumption of the system.

[0026] Furthermore, the cartridge valve numerical control regulator 8 is internally integrated with a servo drive circuit and a control circuit (not shown in the figure). The servo drive circuit is used to drive the servo motor, and the control circuit is used to receive external control signals and control the servo drive circuit. Integrating the servo drive circuit and the control circuit into the cartridge valve numerical control regulator 8 simplifies the structure of the system and improves the reliability and stability of the system.

[0027] As a preferred technical solution, the control circuit may be provided with a 485 bus interface (not shown in the figure) for communicating with an external control system. Using the 485 bus as an external control interface can realize the remote control and data transmission between the system and the upper computer, facilitating the integration and management of the system.

[0028] As a preferred technical solution, the pilot valve 9 can be opened when the system pressure exceeds a preset value, so that the cavity 4 is communicated with the oil return pipeline (not shown in the figure) to reduce the system pressure. The opening pressure of the pilot valve 9 can be adjusted by adjusting the pressure regulating screw on the pilot valve 9. The setting of the pilot valve 9 can play a protective role when the system pressure is too high, preventing dangerous situations caused by too high system pressure and improving the safety of the system.

[0029] As a preferred technical solution, the control circuit can memorize the stroke of the limit rod 10 in the case of power-off and control the limit rod 10 to return to the memorized stroke position after power-on. Being able to memorize the stroke of the limit rod 10 in the case of power-off and automatically return to the memorized position after power-on can compensate for mechanical wear, improve the repeat positioning accuracy of the system, and reduce the difficulty of manual operation.

[0030] By arranging the pilot valve 9 outside the cylinder block 2 and integrating the limiting mechanism into the cartridge valve numerical control regulator 8, the present utility model simplifies the structure inside the cylinder block 2, reduces the number of parts and the machining difficulty inside the cylinder block 2, and lowers the requirement for machining accuracy, thus effectively solving the problems of high manufacturing difficulty and high cost caused by the complex internal structure of the cylinder block in the prior art.

[0031] Description of the reference numerals

[0032] 1. Feeding machine

[0033] 2. Cylinder block

[0034] 3. Mounting surface

[0035] 4. Cavity

[0036] 5. Spool

[0037] 6. Hydraulic oil passage

[0038] 7. Spring

[0039] 8. Cartridge valve numerical control regulator

[0040] 9. Pilot valve

[0041] 10. Limiting rod

Claims

1. A CNC electric hydraulic control system for material punching, characterized in that: include: A cylinder body installed on the punching machine, wherein the cylinder body is provided with a mounting surface and a cavity communicated with the mounting surface, a valve core is provided in the cavity, and the cavity is communicated with a hydraulic oil channel; a spring disposed between the mounting surface and the valve core; A cartridge valve digital control regulator mounted on the mounting surface, the cartridge valve digital control regulator comprising a pilot valve and a limit rod, the pilot valve is located outside the mounting surface, one end of the limit rod is connected to the pilot valve, and the other end extends into the cavity; A limit mechanism is provided in the pilot valve, and the limit mechanism is used to control the stroke of the limit rod. The stroke of the limit rod limits the movement stroke of the valve core in the cavity. The movement stroke of the valve core controls the connection and disconnection area between the cavity and the hydraulic oil channel, thereby controlling the flow rate of the hydraulic oil.

2. The material-beating CNC electric adjustment hydraulic control system according to claim 1 is characterized in that: The limiting mechanism comprises a servo motor, a screw rod and a transmission mechanism. The servo motor drives the screw rod to move, and the screw rod drives the transmission mechanism to change the stroke of the limiting rod.

3. The material-beating CNC electric adjustment hydraulic control system according to claim 2 is characterized in that: The transmission mechanism comprises a nut threadably connected to the lead screw and a speed reduction mechanism arranged between the nut and the limiting rod.

4. The material-beating CNC electric adjustment hydraulic control system according to claim 3 is characterized in that: The cartridge valve digital control regulator has a servo drive circuit and a control circuit integrated therein. The servo drive circuit is used to drive the servo motor, and the control circuit is used to receive an external control signal and control the servo drive circuit.

5. The material-beating CNC electric adjustment hydraulic control system according to claim 4 is characterized in that: The control circuit is provided with a 485 bus interface for communicating with an external control system.

6. The material-beating CNC electric adjustment hydraulic control system according to claim 1 is characterized in that: The pilot valve can be opened when the system pressure exceeds a preset value, so that the cavity is connected to the oil return pipeline to reduce the system pressure.

7. The material-beating CNC electric adjustment hydraulic control system according to claim 4 is characterized in that: The control circuit can memorize the stroke of the limit rod when power is off, and control the limit rod to return to the memorized stroke position after power is on.

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