Application scope of 4WE10 solenoid reversing valve

4WE10 electromagnetic reversing valve is a directional control valve widely used in the field of industrial automation, and is a classic model in the Rexroth series. It drives the valve core movement through electromagnetic force to switch the oil flow direction in the hydraulic system, and has the characteristics of compact structure, fast response speed and high reliability. The following is its core application scope and industry case analysis:

1. Core application areas

1. Engineering machinery

Typical equipment: Excavator: controls the expansion and contraction direction of the hydraulic cylinder of the boom, the rod, and the bucket, and realizes excavation, rotation, walking and other actions.

Loader: Switch the lifting and flip the oil circuit of the working device (such as the bucket) to adapt to loading and transportation scenarios.

Crane: adjusts the hydraulic flow direction of the amplitude variable mechanism and the rotary mechanism, and controls the lifting and rotation of the boom.

Advantages: High pressure bearing capacity: The 4WE10 valve body is made of high-strength cast iron or steel material, which can withstand system pressure up to 31.5MPa, adapting to heavy-load conditions of construction machinery.

Quick response: After the solenoid is powered on, the valve core movement time is ≤50ms, meeting the rapid movement needs of the excavator boom (such as the boom lifting time is ≤3 seconds).

Anti-pollution design: The gap between the valve core and the valve body is controlled at the micron level. It is used with the oil filter and can withstand hydraulic oil pollution NAS 1638 grade 9-10, reducing the failure rate.

2. Plastic machinery

Typical equipment: Injection molding machine: controls the reversal of hydraulic cylinders that control injection, mold closing, ejection and other actions, and realizes the automation of the molding cycle of plastic products.

Extruder: Adjust the steering of the screw drives the hydraulic motor and controls the extrusion direction and speed of the plastic melt.

Blow molding machine: Switch the hydraulic oil circuits of the clamping, inflation, cooling and other workstations to ensure the quality of the bottle body forming.

Advantages: Precision flow control: By matching proportional electromagnets (such as 4WRE10 model), stepless flow adjustment can be achieved (flow range 0.5-200L/min), which meets the pressure control requirements of the injection molding machine during the pressure holding stage (pressure holding pressure fluctuates ≤±1%).

Low leakage design: adopts a soft seal structure (such as polytetrafluoroethylene sealing ring), with an internal leakage amount of ≤0.1cm³/min, reducing energy loss of hydraulic system and reducing energy consumption by 10%-15%.

Compact installation: The valve body size is small (such as the 4WE10D model size is 100×60×40mm), which can be integrated into the injection molding machine control valve group, saving installation space.

3. Metallurgical Equipment

Typical equipment: Continuous casting machine: controls the reversal of hydraulic cylinders such as crystallizer vibration, billet puller clamping, etc., to ensure the continuous casting quality of steel billets.

Rolling mill: adjust the oil flow direction of hydraulic systems such as rolling roll pressing, bending rolls, and squirting rolls to achieve accurate control of the plate shape.

Blast furnace top equipment: switch the hydraulic oil circuit of the fabricator rotation, weighing bucket opening and closing and other workstations to ensure the stable operation of the blast furnace.

Advantages: High temperature adaptability: The valve body material can be selected as high-temperature resistant alloy (such as stainless steel 316L), combined with high-temperature hydraulic oil (such as ISO VG68), and can work for a long time in 120℃ environment to adapt to the high-temperature conditions of the metallurgical industry.

High reliability: The electromagnet adopts a wet design (IP65 protection level) to prevent dust from intrusion, with an average failure-free time (MTBF) of more than 500,000 times, meeting the continuous production needs of metallurgical equipment.

Impact resistance design: The valve core adopts cemented carbide coating (such as the thickness of chromium coating ≥20μm), which resists the impact of metal particles in hydraulic oil and extends the service life by 3-5 times.

4. Machine tools and automation production lines

Typical equipment: CNC machine tool: controls hydraulic actions such as spindle box lifting, tool holder reversing, chuck clamping, etc., to achieve machining automation.

Stamping line: Switch the hydraulic oil circuits at the punch slider, feeding mechanism, waste discharge and other stations to improve stamping efficiency (such as the beat of the step-in die stamping line can reach 300 times/minute).

Robot: Adjust the steering of the hydraulic motor of the joint of the robotic arm to achieve multi-degree of freedom motion control (such as the repeat positioning accuracy of 6-axis robot ±0.05mm).

Advantages: High-precision positioning: By matching position feedback sensors (such as LVDT linear displacement sensors), the valve core position closed-loop control can be achieved, with a positioning accuracy of ±0.01mm, meeting the machine tool processing accuracy requirements.

Quick reversing: After the solenoid is powered off, the valve core is reset by the spring, and the reset time is ≤30ms, which meets the needs of rapid tool change of the machine tool (such as the tool change time of the machining center is ≤2 seconds).

Modular design: The 4WE10 valve body supports multi-valve parallel connection (such as superimposed valve set), which can flexibly expand functions, reduce pipeline connections, and reduce leakage risks.

2. Typical craft scenes

1. Hydraulic system direction control

Application: Switch the oil flow direction in the hydraulic system to achieve forward and reverse rotation or stop of actuators (such as hydraulic cylinders, hydraulic motors).

Technical features: 4WE10 solenoid reversing valve provides a variety of valve core functions such as two-position three-way, two-position four-way, three-position four-way, etc., to meet different working conditions.

The electromagnet voltage can be selected from DC24V or AC110V/220V to adapt to different power supply environments.

It is equipped with manual emergency operation device, which can manually switch the valve core position when the solenoid fails to ensure the safety of the equipment.

2. Hydraulic system pressure holding and unloading

Application: During the pressure holding stage of the injection molding machine or the machine tool clamping conditions, the system pressure is maintained through the electromagnetic reversing valve.

Technical features: Three-position and four-way median function (such as O-type), the valve core is in the middle when the solenoid is powered off, and the two chambers of the hydraulic cylinder are closed to realize the pressure holding function (the pressure holding time can reach several hours).

When used with an accumulator, it can further reduce pressure fluctuations (such as pressure-holding pressure fluctuations ≤±0.5MPa).

When the equipment is shut down, by switching to the unloading function (such as H type), the hydraulic pump output fluid is directly returned to the oil tank, reducing system energy consumption.

3. Hydraulic system sequence action control

Application: In an automated production line, the sequential action of the hydraulic cylinder is achieved through the combination of multiple electromagnetic reversing valves (such as the slide downward → feed → slide back → waste discharge in the stamping line).

Technical features: PLC or sequential controller programming is used to realize complex action logic by controlling the order of energization of the solenoid.

The 4WE10 solenoid reversing valve supports electrical signal delay control (such as the power-on delay of 0.1-10 seconds), which meets different operating time requirements.

Equipped with pressure switch or stroke switch as feedback signals to realize closed-loop control of action and improve system reliability.