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The hydraulic press machine is a kind of special hydraulic oil as the working medium, the hydraulic pump as the power source, and the force of the pump to make the hydraulic oil enter the cylinder/piston through the hydraulic pipeline, and then there are several cylinders/pistons in the cylinder/piston. Groups of seals that cooperate with each other, the seals in different positions are different, but they all play a role in sealing, so that the hydraulic oil cannot leak. Finally, through the one-way valve, the hydraulic oil is circulated in the oil tank to make the oil cylinder/piston circulate to do work, so as to complete certain mechanical actions as a kind of machinery of productivity.

The hydraulic press consists of two parts: the host machine and the control mechanism. The main part of the hydraulic press includes the fuselage, the main cylinder, the ejector cylinder and the liquid filling device. The power mechanism consists of a fuel tank, a high-pressure pump, a low-pressure control system, an electric motor, various pressure valves and directional valves, etc. Under the control of electrical devices, the power mechanism realizes energy conversion, adjustment and delivery through pumps, oil cylinders and various hydraulic valves, and completes the cycle of various technological actions.

Hydraulic presses are classified according to their structure.Now it is mainly divided into: four-column hydraulic press (three-beam four-column, five-beam four-column), double-column hydraulic press, single-column hydraulic press (C-shaped structure), frame hydraulic press, etc.

Classification according to the purpose of the hydraulic press.Mainly divided into metal forming hydraulic press, bending hydraulic press, stretching hydraulic press, blanking hydraulic press, powder (metal, non-metal) forming hydraulic press, press fitting hydraulic press, extrusion hydraulic press, extrusion molding, etc.

The hydraulic press directly driven by the hydraulic press pump has the following characteristics

1. The stroke speed of the movable beam of the hydraulic press depends on the liquid supply volume of the pump, and has nothing to do with the deformation resistance of the forging during the process. If the liquid supply volume of the pump is constant, the working speed of the hydraulic press is a constant value.

2. The hydraulic supply pressure and power consumption of the pump are related to the deformation resistance of the workpiece to be processed. If the working deformation resistance is large, the hydraulic supply pressure and power consumption of the pump are also large, and vice versa.

3. The characteristics of the constant travel speed of the movable beam and the change of the pump supply pressure can be used as the signal for manipulating the distributor to realize the automatic control of the hydraulic press.

4. The basic investment is low, the floor area is small, and the daily maintenance and maintenance are simple. The hydraulic pumps in the pump direct drive system are all selected according to the maximum working speed and working pressure of the hydraulic press, and the hydraulic pumps cannot be fully utilized when the filling stroke, return stroke, auxiliary process and required working pressure of the hydraulic press are small, especially It is a hydraulic press with a large tonnage, and its utilization factor is very low. Therefore, the hydraulic press tends to transmit the working speed and working pressure in stages.

It is widely used in the processing of spare parts in the automotive industry and the shaping, punching, and correction of various products in various industries, as well as the press-fitting and embossing of parts such as shoes, handbags, rubber, molds, shafts, and bushings, and plate parts. Bending, embossing, sleeve stretching and other processes, washing machines, motors, automobile motors, air-conditioning motors, micro motors, servo motors, wheel manufacturing, shock absorbers, motorcycles and machinery and other industries.

Hydraulic transmission is a transmission method that uses liquid pressure to transmit power and control. The hydraulic device is composed of hydraulic pumps, hydraulic cylinders (hydraulic motors and other actuators), hydraulic control valves and hydraulic auxiliary components

Hydraulic pump: A conversion device that converts mechanical energy into hydraulic energy.

Hydraulic cylinder (hydraulic motor and other actuators): convert hydraulic energy into mechanical energy.

Control valve: control the flow, flow direction, pressure of hydraulic oil, the working order of hydraulic actuators, etc. and protect the hydraulic circuit. In layman's terms, it is to control and adjust the flow direction, pressure and flow of hydraulic medium. In order to control the direction of movement of the actuator, the output force or torque. Movement speed. Action sequence, and limit and adjust the working pressure of the hydraulic system to prevent overload and other functions (such as check valve, reversing valve, relief valve, pressure reducing valve, sequence valve, throttle valve, speed regulating valve, etc.)

Auxiliary components: 1. Oil tank: used to store oil and dissipate heat. Effect of air and impurities in the separated oil 2. Oil pipe and oil pipe joint 3. Oil filter 4. Pressure gauge 5. Sealing elements