Clamping elements
Test head in the clamp
A versatile testing unit should also work efficiently and cost-effectively. In order to optimize such a device, Sonplas, as a manufacturer of assembly and testing systems, has installed clamping elements from ACE in a development.
In companies of all sizes, process controlling plays a central role, especially in production. Manufacturers of high-tech components must ensure that their products meet the highest standards of certification or official acceptance and compliance with industry standards.
While specialist partner companies are increasingly being commissioned to produce test systems for reasons of time and cost, the awarding of contracts to third parties must not be accompanied by inaccurate test results for compliance with standards or norms. For this reason, manufacturers in the automotive, aviation and electrical industries place the same demands on suppliers as they do on themselves. This effect is in turn transferred to the suppliers' suppliers. These high requirements also apply to the cooperation between Sonplas and ACE shock absorbers.
Sonplas is a supplier of assembly and testing systems. The company relies on ACE products for decelerating drives. The specific task was to support the electric drive of a testing system. This brings a test head to a defined dimension.
Once the specified distance has been reached, the servomotor of the drive switches off so that the test head can no longer move. The clamping units are then actuated to ensure that it remains in this position. Next, pressure is applied to the component to be tested, creating a counterforce of around five kilonewtons. After the test, which lasts around 30 seconds, the pressure is switched off. This also removes the counterforce. The clamping units are then released and the electric drive returns to its home position.
The test head itself is guided by two guide carriages. The shafts that run through the clamping units are only used to hold the force. They are attached to the test head with a type of coupling and are therefore dependent on its tolerances.
Clamped test unit as a solution
As this test unit is used in all areas supplied by Sonplas and is designed for 120 test procedures per hour, a clamping element had to be found in ACE's portfolio that could not only apply the required forces, but also guarantee at least 1.5 million clamping procedures before replacement. In addition, a clamping weight of 40 kilograms had to be taken into account.
The subsequent design revealed that ACE Locked PN63-20-2-6B clamping elements are ideal for this application. With holding forces of 3,600 newtons and a holding torque of 35 newton meters, they work significantly more effectively at an operating pressure of six bar than hydraulic clamping systems, for example.
For Sonplas, this not only means the desired effective clamping, but also that the drive of the testing system could be made smaller, which saves space. In this case, only a few weeks passed between the first contact between the two companies and the successful implementation. pb
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