Vibrators for reduction of residual stresses
PZ VIBROMATIC
Controlled Vibratory Treatment for Dimensional Stabilization of Welded Structures
PZ VIBROMATIC is a system designed for the vibratory treatment of welded structures with the aim of reducing residual stress levels and improving dimensional stability. The process does not require heating of the structure and, where technically appropriate, provides an alternative method of dimensional stabilization.
How Vibratory Treatment Works
Welding generates residual stresses within a structure, which may affect its dimensional stability during subsequent processing. PZ VIBROMATIC uses controlled mechanical vibrations within the resonance frequency range. The vibratory loading promotes the redistribution of residual stresses and may contribute to reducing their levels and improving the dimensional stability of the structure.
RESONANCE → CONTROLLED VIBRATION → STRESS REDISTRIBUTION → EVALUATION AND REPORT
Key Benefits
- No heating required: The treatment is performed without the thermal cycle associated with stress-relief heat treatment. Consequently, thermal effects associated with annealing, such as scale formation or grain coarsening caused by the thermal cycle, are avoided.
- Process completed within 45 minutes: The entire cycle, including evaluation and report printing, can be completed within 45 minutes.
- Structures weighing up to 30 tonnes: Large-scale structures weighing up to 30 tonnes and measuring several tens of metres in length can be treated directly on site, eliminating the need to transport them for heat treatment.
- Direct integration into the production process: The treatment can be carried out after welding and before subsequent processing. It helps stabilize the structure and reduce the risk of deformation during subsequent machining.
Typical Applications
Welded steel structures • frames and load-bearing systems • mechanical engineering and process equipment assemblies • components requiring dimensional stability
lled and Documented Process
The system measures vibration amplitude as a function of frequency, identifies and enables the selection of suitable resonance levels, and performs the vibratory treatment at selected frequencies for a preset period of time. Upon completion of the treatment, a report is generated containing a graph and the measured values.
Technical Specifications
| Parameter | Value |
|---|---|
| Power supply | 230 V / 50 Hz |
| Power input | 1.7 kVA |
| Control cabinet dimensions | 470 × 450 × 165 mm |
| Control cabinet weight | 10 kg |
| Max. vibrator speed | 9,000 min⁻¹ |
| Max. centrifugal force | 17.59 kN |
| Vibrator protection rating | IP65 |
| Vibrator weight | 27 kg |
System or Service
PZ VIBROMATIC can be purchased as a complete system, or vibratory treatment can be provided as an on-site service at your facility. When supplied as a service, the treatment is carried out by trained specialists from PRVÁ ZVÁRAČSKÁ, allowing you to benefit from the technology without investing in your own equipment.
Contact
Ing. Tomáš Fodrek
E-mail: fodrek.tomas@pzvar.sk
Do you have a specific application? Contact us and we will assess whether vibratory treatment is suitable for your structure.
