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Euro Coins Extraction Test

Specification

 
The customer needed to find out the force to extract the inner part of the 1 and 2 Euro coin from their outer parts. This is to ensure that the coins are capable of remaining assembled in normal usage and would withstand a destructive push-out force of at least 1800 N.

Solution

As this test would be done on a multitude of samples, a 2500 N VersaTest motorised test stand was supplied with an AFG 2500 N force gauge. The accessories developed by the customer had 2 main parts, the compression rod and the plate holder.

The compression rod is fixed directly onto the loadcell of the AFG. The plate holder (cylinder form) maintains the euro coin in the vertical axis directly below the compression rod.

The compression rod applies a force at slow speed to the inner part of the coin, which falls through the cylinder and slides out of the plate holder. Typical push-out forces were between 1600 N - 2000 N.

For loadcell protection, the stand reverse cable, between the AFG and the VersaTest was used to return the crosshead to its original position if the force ever reached the maximum limit set by the alarm point of the AFG.

System

  • VersaTest (superseded by the MultiTest-dV series)
  • AFG 2500 N
  • Stand Reverse Cable
  • Compression Rod and Cylinder Plate Holder Fixture