Probably the most popular type of press brake technology, hydraulic presses are a great solution for manufacturers seeking accuracy and control in high tonnage operations. To get the most out of these machines however, you do need to be vigilant and perform regular maintenance checks. This week, we run through five essential maintenance tasks you should perform in order to keep your hydraulic press in good working order.
Perform regular leak checks
Only a damaged hydraulic press leaks. If you notice a leak, check the ram of the press, O ring seals, valve seats, hose end fittings, and hydraulic lines immediately to identify the source of the leak. Lubrication issues are a common cause of leakage, so it’s important to consult your operation manual and apply the correct kind of lubrication wherever necessary.
Do a daily check
You should perform a daily check for oil leaks, oil level, loose bolts, guided platens and press ram lubrication (it should be light), oil temperature, and general cleanliness as well as the automatic shutdown function when the beam is broken.
Ensure pressure builds quickly
A hydraulic press in good working condition takes no more than 1.5 seconds to reach the maximum required pressure. If the pressure build-up takes more than two or three seconds, this could indicate a pump problem, that the relief valve is working too slowly, or that the press motor is not producing enough revolutions per minute for pressure to build up. Dirt or debris in the line, or the valve being open too wide are both common causes of compromised valve function.
Keep an eye on valve shifts
When working properly, valve shifts should be smooth and silent. Any banging noises which occur during speed changes could be an indication that something is not working as it should be, and needs to be investigated as soon as possible.
Count the strokes
Valve coils typically have a lifespan of 3 million strokes, whilst relays have a life cycle of 1 million strokes. Keeping an eye on these numbers helps you anticipate when the coils need replacing, so you can do it before they fail and reduce overall downtime. Use an hour meter or no resettable cycle counter to establish accurate lifecycle times and develop a maintenance schedule.
ACRA are a reputable stockist of new and used press brake technology. To learn more about our capabilities, please don’t hesitate to get in touch with us by calling 03 9794 6675.