When dealing with precision equipment weighing thousands of pounds or oversized transport packages, traditional vibration table surfaces often prove inadequate. The industry has long struggled with challenges like load center-of-gravity shifts and height-induced moment imbalances that force engineers to abandon complex vibration testing scenarios.
Unholtz-Dickie (UD) has addressed this critical industry need with its Structure Guided Head Expanders (HEG series), a solution that goes beyond simple surface extension to create a robust "external skeleton" for vibration testing systems.
Core Technical Advantages and Structural Design
The HEG series delivers exceptional load support and guidance capabilities through innovative engineering. To handle complex, heavy test specimens, UD integrated four sets of rigid linear bearings or shear-mounted supports. This design provides powerful lateral constraints for off-center or tall test loads, effectively counteracting overturning moments during vibration to ensure smooth, safe operation.
The system features intelligent Airmounts positioned beneath the head expander. These automatically synchronize with existing Auto-Centering Systems to perform instant alignment adjustments when placing loads. This innovation significantly reduces operator effort while eliminating vibration table imbalance risks caused by installation deviations.
Flexibility and Compatibility Considerations
Recognizing that flexibility is as crucial as stability in testing environments, UD designed the HEG series with easy disassembly features. When transitioning from vertical to horizontal vibration testing, users can quickly remove the expander to facilitate rapid table rotation for slip table compatibility. This modular approach maximizes laboratory equipment utilization across diverse testing conditions.
The series offers multiple expander configurations with maximum load capacities reaching 12,000 pounds (approximately 5,450 kilograms). For specific vibration table models, UD provides customized support structures to enhance suspension system rigidity.
Technical Specifications Overview
UD provides standardized sizing options to match various armature diameters:
- HEG12-30R: 31.5-inch (800mm) diameter surface for 12-inch armatures
- HEG16-30R: 31.5-inch (800mm) diameter surface for 16-inch armatures
- HEG12-2424: 24×24-inch (610×610mm) surface for 12-inch armatures
- HEG16-7236: 72×36-inch (1828×914mm) surface for 16-inch armatures
- HEG24-6060-20: 60×60-inch (1524×1524mm) surface for 24-inch armatures
- HEG16-7272: 72×72-inch (1828×1828mm) surface for 16-inch armatures
By combining structural guidance with active centering technology, Unholtz-Dickie's HEG series not only solves stability challenges in heavy-load testing but also delivers exceptional testing flexibility through modular design. This solution represents a significant advancement for vibration testing applications demanding both precision and durability.
