Stable pressure in a hydraulic press machine is a key factor in ensuring processing quality, equipment safety, and production efficiency. During operation, pressure fluctuations may occasionally occur. So, what are the causes of these fluctuations?
- Vibration causes the locking nut on the pressure adjustment screw to loosen, resulting in pressure fluctuations.
- Contaminated hydraulic oil containing fine dust particles prevents the main spool from sliding smoothly, causing irregular pressure changes and occasionally causing the valve to jam.
- Poor sliding of the main spool causes the damping orifice to alternately become blocked and unblocked.
- The conical surface of the main valve spool does not make proper contact with the conical valve seat, indicating insufficient running-in.
- The orifice in the main valve spool is too large, preventing it from providing the intended damping effect.
- The adjustment spring in the pilot valve is bent, causing poor contact between the valve spool and the conical valve seat, resulting in uneven wear.
Solutions:
- Clean the hydraulic oil tank and lines regularly, and filter the hydraulic oil before it enters the tank and line system.
- If filters are already installed in the lines, add a secondary filter element or upgrade the filtration rating of the existing secondary element. Additionally, disassemble and clean the valve components, and replace the hydraulic oil with clean oil.
- Repair or replace defective parts.
- Reduce the diameter of the hydraulic press machine’s damping orifices appropriately.
Shanghai ANTISHICNC is a professional manufacturer of hydraulic press machine, offering customized services. ANTISHICNC’s hydraulic press machine are known for their high precision, high efficiency, and high safety, earning high praise from customers. For example, the 400-ton four-column hydraulic press machine shown below.
400 ton four columns hydraulic press machine adopts three beams and four columns structure, from the upper crossbar, slider, worktable, column, master cylinder, hydraulic power system and electrical system and other components, the pressure is 400T. It is a wide range of applications of pressure machinery, suitable for a variety of plastic material pressing process, such as stamping, bending, flanging, thin plate parts of the stretching, molding, punching, bending, and so on. It can also be engaged in calibration, press fitting, wheel molding, plastic products and powder products press molding.
The machine with pointing and semi-automatic operation mode. Slider stroke is adjusted by stroke control device. In addition to the buttons on the operating table to complete all the actions of the press, there should be “two-handed pressing”, “return”, “stop”, “emergency stop” and other buttons.
| Description | YQ32-400T |
| Maximum liquid pressure (Mpa) | 25 |
| Slider stroke (mm) | 1000 |
| Maximum opening height (mm) | 1500 |
| Working table size (mm) | 1260*1200 |
| Down speed of empty range (mm/s) | 100 |
| Working speed (mm/s) | 2-10 |
| Return speed (mm/s) | 80 |
| Motor power (kw) | 22 |
| Machine size(L*W*H)(mm) | Around 1850*1400*4800 |
| Pump station size (L*W*H)(mm) | Around 1300*1350*1700 |
| Machine weight (T) | Around 14 |
Remark: The above parameters are for reference only, the actual parameters of the machine please refer to the technical program of Shanghai ANTISHICNC.
If you have the hydraulic press machine needs too, welcome to consult Shanghai ANTS Machine Equipment co., ltd. We have rich experience in manufacturing and using punching machine and can provide you with professional technical support.
Keywords: hydraulic press machine, four-column hydraulic press machine, 400T hydraulic press machine