S-120-3 Air Spring YOKOHAMA F-120-3 Hydraulic Punch Press Airbag
Product Description
| Manufacturer | Cross |
GUOMAT F-120-3 GUOMAT F 120 3 GUOMAT F1203 | YOKOHAMA S-120-3R YOKOHAMA S 120 3R YOKOHAMA S-120-3 YOKOHAMA S 120 3 YOKOHAMA S120-3 YOKOHAMA S 120 3 YOKOHAMA S120-3R |
F-120-3 GUOMAT Rubber Air Spring Technical Data
| Model Number | F-120-3 |
| Height H (mm) | Design Height | 152mm |
| Max Height | 227mm |
| Min.Height | 82mm |
| Common Max.Travel(mm) | ±53 |
| Compression Max Outside Dia.(mm) | 180 |
| Approximate value at standard height and internal pressure of 0.49
MPa | Effective Area(cm2) | 113 |
| Volume(L) | 2.1 |
| Load(KN) | 5.2 |
| Dynamic Spring Constant(n/mm) | 98 |
| Natural Vibration Frequency(Hz) | 2.2 |
| Max.Internal Pressure(MPa) | 0.88 |
| Internal Pressure Failure(MPa) | 2.9-3.9 |
How to Replace the Punch Press Airbag
1. Power off and pressure relief
Disconnect the power supply of the punch press and lock it (lockout
procedure, LOTO).
Turn off the air supply, exhaust the residual air pressure in the
air path, and ensure that the system is completely depressurized.
2. Remove the old airbag
Remove the air pipe joint connected to the airbag (note the
position of the interface mark to avoid reverse installation).
Remove the bolts or clamps that fix the airbag (special tools may
be required).
Carefully remove the old airbag and check for wear, cracks or signs
of leakage.
3. Clean the installation surface
Clean the contact surface of the airbag installation position to
ensure that there is no oil, rust or residue.
Check whether the friction plate or linkage parts are worn and
replace them if necessary.
4. Install the new airbag
Align the new airbag to the installation position and ensure the
correct direction (refer to the original factory mark).
Tighten the fixing bolts evenly (tighten in diagonal order to avoid
uneven force).
Reconnect the air pipe to ensure sealing (raw tape or sealant can
be used).
5. Testing and debugging
Restore the air source, slowly increase the pressure, and check
whether the airbag is evenly inflated and has no leakage.
Run the test without load to observe whether the clutch/brake moves
smoothly.
Test by loading gradually to confirm that the punch press is
working properly.
Precautions
1. Safety first: Be sure to operate when the equipment is
completely stopped and there is no residual energy. Wear protective
gloves and goggles to avoid fragments flying when the airbag
ruptures.
2. Matching model: The new airbag must be consistent with the
original specifications (size, pressure level, material).
3. Air circuit inspection: If the action is abnormal after
replacement, check whether the air circuit is blocked or the
solenoid valve is faulty.
4. Professional assistance: If you are not familiar with the
structure, it is recommended to contact the equipment manufacturer
or professional maintenance personnel.
Common problems
Airbag leakage: Check whether the air pipe joint is loose or the
airbag seal is aging.
Insensitive action: It may be insufficient air pressure or wear of
friction plate, which requires comprehensive investigation.
After completing the replacement, it is recommended to record the
maintenance time and the model of the replaced parts for subsequent
maintenance. If it is a large punching machine or high-frequency
equipment, regular inspection of the airbag status (every 3-6
months) can prevent sudden failures.
