EN WIAP® MEMV® VSR® · Stress relief of metals by vibration

Stop distortion. Remove residual stresses. Directly on the part.

Do your parts distort during finish machining? With WIAP® MEMV® VSR® you reduce residual stresses through controlled vibration in several directions, directly on the workpiece, in your own workshop.

Have your part checked free of charge How it works

WIAP® MEMV® VSR® – vibration exciter on a workpiece

Over 40 yearsof experience

up to 700×less energy*

Several patentsin the field of MEMV

Worldwideincl. turbine manufacturing, steel construction and mechanical engineering

* compared with stress relief annealing, depending on the part

How it works

A vibration exciter is clamped directly onto the workpiece. The part is excited in a controlled way in several directions, using the multi-directional process developed by WIAP. The residual stresses are relieved, so the part no longer distorts during further machining.

MEMV or stress relief annealing?

WIAP® MEMV® VSR®	Annealing furnace
Treatment directly on the part	Transport to the furnace and back
No heating, no cooling	Long heating and cooling times
Done in hours	Often days of lead time
Low energy demand	High energy consumption
No scale, no change in microstructure	Scale, thermal load
Report for every treatment	Furnace curve

Your benefits

No distortion during finish machining, better dimensional accuracy
Less rework and scrap
Weld seam strength is preserved
Reproducible thanks to fixed process values
Easy to integrate into the production process
Also suitable for surface-treated parts

Typical applications

WIAP® MEMV® VSR® – Large ring part (impeller) — Large ring part (impeller)

WIAP® MEMV® VSR® – Large plate (several steel plates) — Large plate (several steel plates)

Machine beds and frames · Welded assemblies · Steel structures · Turbine components · Rolls · Shafts · Plates · Vessels · Impellers · Pipes · Parts made of duplex steel and titanium · Aluminium structures

Three ways to MEMV

1. Buy your own system

Type ES: up to approx. 10 treatments per month
Type E: approx. 10 to 40 treatments per month
Type EH: fully automatic, more than 40 treatments per month

WIAP® MEMV® VSR® – ES system — ES system

WIAP® MEMV® VSR® – E / EH system — E / EH system

2. Contract treatmentWe treat your parts at our site or, by arrangement, at your premises.

3. Consulting and part testTogether with you, we check whether MEMV is suitable for your part.

For over 40 years, WIAP AG in Switzerland has been building systems for stress relief of metals by vibration.

Frequently asked questions

Does MEMV work on welded structures?

Yes, MEMV is particularly effective on welded steel and aluminium structures.

What part sizes are possible?

From smaller parts of about 5 to 10 kg up to large machine beds, rolls and steel structures of up to 200 tonnes.

How long does a treatment take?

Usually 32 to 45 minutes: about 4 minutes per direction, 4 or 8 directions depending on the system, plus clamping the exciter. In most cases the part is ready the same day.

Can MEMV replace stress relief annealing?

For many applications, yes, as a cost-effective alternative. Straightening stresses and machining stresses can be treated very well. Where a standard or a customer explicitly requires annealing, we clarify this together with you.