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Teach You to Master These Knowledge of Cnc Hydraulic Press

Feb. 21, 2020

CNC hydraulic machine, also known as CNC hydraulic press, CNC press, CNC press, is mainly composed of C-shaped frame, moving plate, lower table, guide column, main cylinder, hydraulic system, electrical system, pressure sensor, pipe Road and other parts.

First, the characteristics of CNC hydraulic press

1. The body adopts a C-shaped structure, which is similar to a traditional mechanical punch, with a simple and compact structure, a small footprint, and easy operation;

2. The main cylinder is a piston-type oil cylinder with a built-in fast cylinder, which can realize rapid downward movement and slow pressing action to improve production efficiency;

3. The oil cylinder is placed above the fuselage. When the oil cylinder is working, it is pressed from top to bottom, the lower mold is stationary, and the upper mold is pressed;

4. The electrical system adopts PLC + touch screen + proportional amplifier, in conjunction with the proportional hydraulic system, issues instructions in accordance with process requirements to complete the machine process cycle action;

5. The hydraulic system of this machine adopts integrated control of hydraulic integrated oil circuit to realize the cyclical action required by the process;

6. The whole body is cast, and after high temperature aging treatment, it has good rigidity and small deformation;

7.Adopt PLC control, set the speed, pressure, time and down position arbitrarily on the screen with high accuracy and good reliability.

Cnc Hydraulic Machine

Cnc Hydraulic Machine

Working principle of pressure-holding circuit system

Press the start button, the electromagnet is energized, and the electromagnetic directional valve is connected to the right position of the system. Part of the oil pressure oil enters the upper cavity of the main cylinder through the throttle valve; the other part of the oil opens the hydraulic control check valve, so that The oil returns to the lower chamber of the master cylinder, the piston of the master cylinder drives the upper slider to descend quickly, the pressure in the upper chamber of the master cylinder decreases, and the oil in the top filling tank is replenished to the upper chamber of the master cylinder through a hydraulic control check valve. When the master cylinder piston drives the upper slider to contact the pressed workpiece, the pressure in the upper cavity of the master cylinder rises, the hydraulic control check valve closes, the filling tank no longer supplies oil to the upper cavity of the master cylinder, and the hydraulic pump flow rate is automatically reduced. The lowering speed of the block decreases, and the pressurization works at a slow speed. When the oil pressure in the upper cavity of the main cylinder rises to the operating pressure of the pressure relay, the pressure relay sends a signal to de-energize the solenoid valve and switch the switching valve to the neutral position. At this time, the hydraulic pump is unloaded and the hydraulic cylinder is switched from the switching valve type. Position function can hold pressure. At the same time, the pressure relay also sends a signal to the time relay, so that the time relay starts to delay. The dwell time is adjusted by the time relay at 0-24min.

Reasons for oil leakage

The causes of oil leakage in hydraulic machinery equipment include design, manufacturing, equipment installation, use, maintenance and other five aspects. The most common oil spills are: fuel oil, lubricating oil, hydraulic oil, mineral oil and cooling oil.

Gearbox leaking oil, leakage between pump shaft and packing due to abrasion, leakage in the leakage layer, leakage of working medium into tight sealing material, and leaking out or inward leaking vacuum with dense material; felt ring seal of reducer shaft Destructive leakage due to the deterioration of the use conditions, leading to rapid wear of seals, or high-temperature carbonization, thermal cracking, plastic deformation and fatigue damage, etc., make the leakage gap quickly increase. Serious abrasion, large deformation, aging of seals, corrosion of seals. Static leakage refers to leakage between the joint surfaces of two parts without relative movement. Leakage between the joint surfaces of the box, flange, thread, stop, edge, etc., and reciprocation leakage refers to the leakage between the joint faces of two parts with relative reciprocation. Leakage Leakage between the piston rod and packing. Leakage in rotary motion refers to the leakage between the leakage shaft and the seal ring between the joint surfaces of two parts with relative rotary motion.

The above is the relevant content about CNC hydraulic press shared by china CNC drilling machine manufacturer. I hope that through the above content, we can let everyone have a better understanding and understanding of CNC hydraulic press.

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