What are the advantages of Shuntec servo hydraulic press?

1. The biggest advantages of the Shuntec servo hydraulic press is that it can control the movement and speed of the slider and configure the appropriate stamping curve for different processing purposes to improve production capacity and quality. Traditional presses cannot elastically control the speed of the slider and can only simply control parameters such as the height of the die, the number of attacks per minute and the pressure of the cushion.

2. The slider of the Shuntec servo hydraulic press can be quickly pulled back at the bottom dead center to speed up the production rhythm, and the pressure time can also be set. The user-friendly operation interface can easily and quickly generate various stamping modes.

3. Shuntec servo hydraulic press can be solved by changing traditional motor to servo motor or hydraulic servo pump. It can achieve high torque at low speed, has stable control of high output power source and high-speed control of motor action, and meets the strong stamping ability of servo hydraulic press and correct high-speed slider action, so as to truly meet the characteristics of stamping processing.

4. The servo hydraulic press is designed with the concept of environmental protection and energy saving. In the mechanism design, the direct drive structure integrating the servo motor and the drive shaft is adopted to save the flywheel and reduce the energy consumption. In terms of electrical control system, through the power leveling design, the change of power load during stamping and slider acceleration and deceleration can be stabilized.

1. The main oil pump of the hydraulic press is directly driven by a servo motor to achieve energy saving.

Servo hydraulic presses currently mainly use switched reluctance motors (SMRs), which have the advantages of simplicity and reliability, efficient operation in a wide speed and torque range, four-quadrant operation, fast response speed and low cost.

2. The closed-loop control of hydraulic pressure and position is realized by changing the speed of the servo motor.

Servo hydraulic press needs to study special control algorithm, so that the hydraulic pressure has high stability and high precision between 1 and 25 MPa.

3. Research on energy recovery and energy management system.

In order to save more energy and reduce energy loss as much as possible, it is necessary to recover and reuse the potential energy of the sliding block's dead weight and the energy generated by the pressure relief of the oil cylinder. In terms of energy management, since the instantaneous power is many times larger than the average power, energy allocation should be done well in large servo hydraulic presses to avoid impact on the power grid.

4. Research and development of special control system.

The control system of the servo hydraulic press is controlled by an industrial PC, and a special control system must be developed.

5. Optimization of forming process based on servo hydraulic press.

Servo hydraulic press can only exert its superiority when it is optimally combined with various forming processes. It is very important to study the forming mechanism of various forming processes and establish the optimal parameters suitable for the forming process to improve product quality and production efficiency and reduce production costs.

6. Optimized design of servo hydraulic press body.

Compared with traditional hydraulic presses, due to the advantages of energy saving and noise reduction, servo hydraulic presses need to consider more factors in the design of the body, including various possible extreme working conditions, working frequency, and the complexity of stamping parts.

Hydraulic press pipeline design is to use pipelines and pipe fittings to connect various components in the hydraulic device to realize the functional design of the hydraulic system. With the development of computer technology, the application in pipeline design mainly focuses on the research of pipeline design numerical analysis, pipeline layout, and pipeline vibration.

(1) Pipeline design simulation technology

With the development of computers and the application of new algorithms, numerical simulation technology has also played an increasingly important role in pipeline design, among which the application of FLUENT and CFX software in pipeline design is the most representative.

(2) Three-dimensional layout design of pipelines

The research on the pipeline layout of hydraulic presses has gradually developed into a 3D multi-constraint and multi-objective condition system. The 3D software JhSolid has new functions such as the location of the starting point and the end of the pipeline, and the automatic generation of the pipeline centerline.

(3) Dynamic design of pipeline vibration

Vibration characteristics of pipelines are the most fundamental and most widely studied contents in pipeline system research, which mainly include inherent characteristics and dynamic characteristics of hydraulic press pipelines.

The Shuntec four-column hydraulic press has an independent power mechanism and electrical system and adopts button centralized control, which can realize three operation modes of adjustment, manual and semi-automatic.

The following introduces the performance and characteristics of the Shuntec four-column hydraulic press:

1. The four-column hydraulic press adopts a three-beam four-column structure, and the beam plate adopts an integral solid steel plate, which avoids the welding deformation and stress deformation of the welded structure, ensures its working accuracy, and the overall structure is compact and space-saving.

2. The four-column hydraulic press realizes the integration of cylinder beam casting, effectively preventing the above defects, with high strength and strong load resistance.

3. The main cylinder of the four-column hydraulic press adopts a piston-type sub-cylinder structure. The sub-cylinder is embedded in the main cylinder. The cross-sectional area of the sub-cylinder is small, which can drive the main cylinder to go down quickly with a small amount of oil.

4. When the smaller parts are formed, the no-load stroke of the beam and the cylinder block can be reduced, the idle stroke time can be reduced, and the length of the guide column and the oil pipeline can be shortened at the same time.

Aiming at the design problems of hydraulic press pipeline such as space interference, reasonable arrangement, flow field distribution, vibration and oil leakage, convenient disassembly and assembly, and reliable maintenance, the key points of hydraulic press pipeline design are as following.

(1) Design of pipe diameter and wall thickness.

Pipe diameter and wall thickness are the two basic parameters to be determined first in pipeline design and are the basis of pipeline design. The wall thickness of the pipe is related to the inner diameter of the pipe, the maximum working pressure, and the allowable stress of the pipe.

(2) Distribution of flow field and temperature field of important pipe fittings.

Analysis of the flow field and temperature field of important pipe fittings is an important part of pipeline design.

(3) Layout design and layout principles.

The pipe layout design is the core part of the hydraulic press piping design. The size of the pipe spacing, the design of the piping direction, and the reasonableness of the piping layout are directly related to the quality of the piping system.

(4) Modal analysis and support arrangement of pipeline vibration.

Vibration is inevitable during the operation of the hydraulic press piping system, which will adversely affect the operation; the vibration should be minimized, the modal analysis of the piping system should be performed, and the natural frequency of the piping system should be changed by adjusting the position of the piping support to avoid resonance.

(5) Determination of piping design principles.

The pipeline design principle has strong generality and is the main reference for designers to carry out pipeline design. The determination of piping design principles can effectively shorten the design cycle and improve design efficiency.

The various components of the hydraulic device in the hydraulic press are connected together by pipelines, and the hydraulic pipeline transports the hydraulic oil from the hydraulic pump to each actuator and then leads it back to the oil tank from the actuator to form a closed circuit. Pipeline design is a key technical issue to ensure the quality of hydraulic presses.

(1) Interference problem.

Interference will cause instability of the pipeline, resulting in problems such as leakage and vibration. Therefore, the existence of interference problems must be avoided in the design of hydraulic press pipelines.

(2) Whether the pipeline arrangement is reasonable or not.

The piping arrangement is the core part of the hydraulic press piping design, which mainly includes two aspects: the piping spacing and the piping direction.

(3) The distribution of the working medium flow field inside the pipeline.

Pipe flow distribution is the main basis for the design of pipeline direction, and it is an important method to study the mechanism of pipeline vibration and energy consumption.

(4) Problems of pipeline vibration and energy consumption.

Reasonable pipeline design can reduce energy loss and pipeline vibration to a certain extent, but it is difficult to avoid.

(5) The problem of easy disassembly and assembly.

The pipeline is generally installed on the basis of the hydraulic press, and an unreasonable design will lead to problems such as difficulty in disassembly and assembly, and inability to assemble. Corresponding operating space should be reserved for easy installation and disassembly during pipeline design.

The high working pressure and large volume of the hydraulic press will accumulate a large amount of hydraulic elastic potential energy during loading, which will have a great shock on the pipeline-interface of the hydraulic system, the interface of hydraulic parts, and even the entire press at the moment of unloading. The following measures can be mainly taken to minimize the shock of the hydraulic systems.

1) Adopt a solenoid valve with damping to slow down the reversing speed;

2) The opening of the slide valve is designed to be a gentle change type so that the deceleration of the load component is uniform;

3) Appropriately increase the inner diameter of the oil return line to reduce the flow rate of the oil in the pipe;

4) Minimize the length of the pipeline or use a rubber hose.

Due to processing technology and other reasons, the hydraulic press adopts a system designed with a closed circulating oil circuit, and the shock impact at high speed now can be also generally eliminated by software to reduce noise and improve the stability of the hydraulic system.

The development of the hydraulic system and the overall structure of the hydraulic press has been relatively mature, and the good technology has significantly improved the hydraulic press in terms of filtering, cooling, and preventing shock and vibration.

1. Flexible design of speed control loop

The realization of the function of the speed control circuit is mainly by connecting a circuit with a throttle valve and a relief valve in parallel in the circuit, which can increase the pressure of the oil pump outlet and realize the function that the relief valve can automatically open with the pressure change.

2. Reasonable selection of unloading methods

When the hydraulic system relief valve pilot oil circuit is used to undertake the unloading function, attention should be paid to the position of the reversing valve, to ensure that when the relief valve is opened, the reversing valve is in the middle position, and only in this position can the low-pressure unloading of the oil pump be completed. Unloading function, and can effectively ensure the effect and quality of unloading.

3. Reduce the hydraulic shock of the cylinder

The main reason for the most prone failure in the use of the hydraulic system is the effect of hydraulic shock. In order to effectively reduce the failure problem caused by hydraulic shock, it is generally used to install and change the structure of the spool valve, install damping components and other parts as a buffer valve and install it at the end of the oil cylinder, so as to solve the problem of hydraulic shock in the oil cylinder.

4. Hydraulic component selection skills

When choosing the structure and parts of the hydraulic system, the friction between the hydraulic components should be fully considered. Therefore, when choosing, it is necessary to fully refer to the work requirements and the reference data of different hydraulic components to reasonably adjust the leakage amount and avoid blindly. adjustment phenomenon.

1. Establish a double closed-loop speed control structure for the hydraulic system

The establishment of a double closed-loop speed control structure, on the one hand, can meet the requirements of the hydraulic system during operation, when the current speed reaches the limit, by adjusting the hydraulic system, the current can be guaranteed to be in a stable state. On the other hand, the double closed-loop speed control structure improves the control process of the hydraulic system and ensures the smooth operation of the system.

2. Use a circuit saving valve to optimize the hydraulic system structure

The hydraulic system structure optimized by the circuit saving valve can use the hydraulic control check valve to control the oil circuit during the lifting of the hydraulic cylinder, enhance the power of the hydraulic logic valve during operation, and ensure that the work of other components is not affected. It can effectively improve the operating efficiency of the hydraulic system.

3. Optimize the system structure through simulation analysis

The introduction of simulation technology into the hydraulic system optimization process can simulate the design of various factors of the hydraulic system's operation effect, and then improve the structure of the hydraulic system through the technical means of collision testing, so as to realize the optimization of the hydraulic system structure and ensure the system's performance. performance.

The hydraulic transmission system is an integral part of the hydraulic machinery, and the design of the hydraulic transmission system should be carried out at the same time as the overall design of the main engine. When designing, we must proceed from the actual situation, combine various transmission forms, give full play to the advantages of hydraulic transmission, and strive to design a hydraulic transmission system with a simple structure, reliable operation, low cost, high efficiency, simple operation, and convenient maintenance.

Design requirements of hydraulic transmission system:

There is no strict sequence in the design steps of the hydraulic transmission system, and the steps are often interspersed with each other. Generally speaking, after clarifying the design requirements, proceed as follows:

1) Determine the form of hydraulic actuators;

2) Analyze the working conditions and determine the main parameters of the hydraulic transmission system;

3) Formulate the basic plan and draw up the schematic diagram of the hydraulic transmission system;

4) Select hydraulic components;

5) Check the performance of the hydraulic transmission system;

6) Draw working diagrams and prepare technical documents;

7) Requirements for dustproof, explosion-proof, cold-proof, noise, safety, and reliability;

8) Requirements for the efficiency and cost of the hydraulic transmission system.