A machine
press, commonly shortened to press, is a machine tool
that changes the shape of a work-piece. Press working may be
defined as chip less manufacturing process by which various components are made
from sheet metal. This process is also called cold stamping. These process are
generally carried out at room temperature. In cutting operations the work piece
is stressed beyond its ultimate strength. the stress caused in metal by applied
forces will be shearing stresses e.g.- blanking, piercing, trimming, shaving.
Forming operations- the stresses are below the ultimate strength of metal. In
these operation there is no cutting forces but only contour of work piece is
changed to get the desired product. Drawing is operation of producing
cylindrical or box shaped components with straight or tapered edges. In drawing
the area of developed blank before drawing should be same as the surface area
of metal in drawing.
All these operations on
the press produce very large impact forces. These forces travel through the
press frame into the foundation. The foundation produces a rebound force equal
to the impact force and this travels inside the machine. These internal forces are produced by the stamping operation on
a press when the press is bolted to a foundation or installed on isolators.
However, the magnitude of the vibration within the press is lower when using
vibration isolators. Bolting the press rigidly to a foundation subjects
it to more vibration and impact force. Vibration isolators are cushions
that transform a sudden shock pulse into a decaying series of longer duration
forces. Imagine the force of hitting a wall with our fist. Now hitting the
wall with the same energy, but with our hand in a boxing glove. It is obvious
that the later hurt less! This is because the impact duration is longer,
effectively reducing the impact force. Short duration impacts mean higher force.
This same thing happens on a press rigidly bolted to the foundation. The sudden
release of potential energy at impact causes the press foot to slam against the
foundation. This fast duration, high magnitude force hits the foundation and
the foundation responds in kind, sending damaging forces back into the press.
In case the press is isolated from the foundation with Dynemech passive
vibration isolators, the isolators will absorb most of the impact energy of
the blow. Now, the impact force at the foundation is reduced and also the
rebound force transmitted by the foundation into the press machine.
Dynemech Spring Isolators with viscous damping
/ Wedge Mounts with Elastomeric Pads offer many benefits:
1.
Installation Savings – Machines are installed faster and easier
than civil construction of a foundation.
- Precision Levelling and alignment features of Dynemech
Wedge Mounts reduces machine wear and tear; increases tool life; and
increases productivity by reducing downtime and improving part quality and
repeatability.
- Reduce vibration and shock levels for a better work
environment.
- Different products/customized
solutions available.
- Simple integration into the
production plant due to flexible installation.
- Machine can be easily
re-located and Re-Levelling is much faster and easier.
- Significantly increased
productivity without higher breakdown risk.
- Better Structural Safety.
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| Mechanical Press on Anti-Vibration Pads |
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| Power Press on AV Mounts |
With increasing production speeds of
high speed presses, vibration problems are amplified. Vibrations not only put
at risk the productivity and the operation time, but also the machinery and
parts life is greatly reduced.
Dynemech
is the leading manufacturer/exporter of Anti-Vibration Mounts to all kinds of
Heavy Press machine OEM manufacturers in India and abroad. Dynemech’s
engineering team provides complete guidance in proper pad selection for various
different types of press machines depending on the machine specifications and
external factors (like installation location). They provide detailed
installation notes with illustrative diagrams for correct anti-vibration pad
installation.
For more details about Anti-Vibration mounts kindly contact us:
Dynemech Systems
101, Priya Aptts.,
Opp. North Ex Mall, Sector 14, Rohini, Delhi – 110 085
Fax:
+(91)-11-43095363
