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These sensors are precision instruments with a resolution of 0.1με.
The devices must therefore be handled with great care. This instruction
manual must be read and observed by every user.
4�1�
Strain Measurement on tie bars and round surfaces
4�1�1�
Parallelism and Clamping Force analysis
4-Tie bar (4-Column) Press machines are used in a wide variety of applications. The goal of these presses is, as the
name suggests, to press an object, applying to it a certain force often called Closing Force or Clamping Force. The
most common models of presses consist of two stationary platens anchored to the ends of four parallel tie bars. One
additional platen is placed between the stationary ones and is free to move by means of a closing unit. This closing
unit serves the purpose of applying the force to the compressed object.
When the press is closed (the moving platen is compressing the object), the applied force causes the two stationary
platens to slightly translate away from each other, making the tie bars elongate.
In an ideal working condition, the amount of this elongation is exactly the same on each of the four tie bars. This is
technically known as "even distribution of the closing force".
In real life, it is common that this distribution is not even. Several factors, such as incorrect installation and non-flat-
ness of the pressed object, can be the cause of this issue. It is fundamental to monitor this phenomenon as it can
induce important damages to the press itself and to the involved parts.
Moreover, in certain applications such as Injection Molding or Die Casting machines, where the compressed object is
a mold, an uneven distribution can result in a produced part with poor quality, not reaching customers specifications.
Not only is the even distribution of the closing force essential, but the total value is also of crucial interest, since it is
applied directly to the compressed object.
With the QE2008-W sensors, measuring and analysing the above mentioned closing force parameters is made avai-
lable in a quick and easy way, and check of each tie bar is immediate. Along with the Sensormate App, the measure-
ments are processed and the overall inspection is presentend via user friendly indicators
4� TYPICAL APPLICATIONS
Subject to technical modifications
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