PNEUMATIC SHOCK TEST MACHINES
Half-sine, sawtooth, and square-wave shock pulses from 3G to 30,000G for product validation
CentraTEQ Ltd are the UK representatives for the US company Benchmark and their range of specialised shock testing equipment, AVEX Shock Test Systems.
AVEX is the undisputed leader in pneumatic shock testing. Avex Shock Machines are used in design and destructive testing of components, hybrids, circuits, and complete assemblies. Because AVEX Shock Machines provide accurate, repeatable test results, they are used globally for both commercial and military applications, testing a wide variety of products from disk drives to wristwatches, spark plugs to automotive sensors.
Benchmark offers three models of the Shock Machine Test System:
- SM-105 Smallest model for testing specimens up to 50 pounds
- SM-110 Mid-range model tests specimens up to 200 pounds
- SM-220 Largest model capable of testing up to 1000 pounds
Benefits
- Keypad Entry of Test Parameters (with 12 character alphanumeric display)
- Shock Testing from 3g’s to 30,000g’s
- Test Specimen Weights Up to 1,000 Pounds (453.59 kg)
- Shock Durations from 0.012ms to 100ms
- Single or multiple drop cycles at a rate of up to 8 cycles per minute
- Compliance with MIL-STD-202, MIL-STD-750, MIL-STD-810 and MIL-STD-883
- 3 Shock Pulse Generators: Half Sine, Sawtooth, and Square Wave
Operation
The Shock Machine is powered by compressed air with pressure ranging from 100 to 125 psi. The following describes a typical drop cycle: Compressed air is introduced to the lower side of the piston, raising the carriage (specimen attachment plate) to a preselected height. Once this is reached, the holding brake is applied. The lift air is dumped, and compressed air is introduced to the upper side of the piston to the desired charge pressure. When this pressure is reached, the holding brake is released. The carriage is then driven downward by the charge pressure, impacting on a pulse generator mounted on the anvil. Upon impact, the brake is actuated, holding the carriage in a rebound position and preventing secondary impact. Simultaneously a data capture system may be triggered for recording the shock pulse.