Vibro/Dynamics ISOLATORS have been installed on tens of thousands of presses. We have a lot of experience isolating machines with a wide variety of DIFFERENT press designs, jobs, and soil CONDITIONS. Lowering the shock level within the machine will improve tooling and machine life and will further improve the work environment with less vibration in the plant.

The following list of suggestions will help reduce vibration and save a lot of downtime and money. 

1. Increase shear in the dies, flat punches will deliver very high snap-through loads. 
2. Use an appropriately sized press for the job. Most press manufacturers do not design their machines to accommodate overloads. For long life, it is advisable to allow some SAFETY factor in the job tonnage. A hard or thick batch of steel or bad tooling can create an overload, causing damage to the machine and higher vibration levels.
3. Avoid small dies in machines with a large die space. Sometimes it has to be done, but small dies tend to load up and store energy by deflecting the slide like a bow.
4. For High-Speed blanking in eccentric geared presses, Vibro/Dynamics has noticed that 500 ton and higher capacity eccentric geared presses running faster than 30 SPM tend to generate much more shock. For these cases, coil spring isolators are strongly recommended.
5. Set the air counter-balance properly.
6. Make sure the press is level and not twisted.
7. Reduce the moving weight or speed. As press speed increases, so does inertia. In some cases, the reciprocating mass of the slide and upper die can generate enough force that it starts to approach the weight of a press, causing the press to “walk”. The formula for determining the “inertia force” generated by the slide and upper die is: inertia force (Peak-Peak)= W/g*r*ω2 where W=moving weight, g=acceleration of gravity (9.8 m/s2 or 386 in/s2), r=stroke length, and ω=machine operating speed in rads/sec (1 SPM = 0.105 rad/sec). Note that the machine speed is a dominant term, doubling the speed quadruples the inertia force. 
8. To check for an inertia force vibration problem, run the machine without hitting material at the speed that normally causes problems. If the vibration problem persists, then the inertia force generated by the unbalanced moving mass is the cause of the vibration.
9. Some machine builders reduce the generated inertia forces in their fast running machines by using a “dynamic balancer”, a slide that runs 180° out-of-phase (directly opposite) from the main slide and upper die. The dynamic balancer is often 100% balanced for a “typical” upper die weight, but MAY be restricted due to clearances within the press crown structure. Spring isolators can be used to install most dynamically balanced presses, but a motion analysis over the press’ speed range should be done first.
10. Make sure the tie rods are stretched correctly.
11. Make sure there are no “short circuits.” Avoid beams, deck plates, and feeds that are connected to both the press and the foundation. 
12. Check and maintain press level.

Vibro/Dynamics isolators have been installed on tens of thousands of presses. We have a lot of experience isolating machines with a wide variety of different press designs, jobs, and soil conditions. Lowering the shock level within the machine will improve tooling and machine life and will further improve the work environment with less vibration in the plant.

The following list of suggestions will help reduce vibration and save a lot of downtime and money.