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Content WIAP® MEMV® 2018


The MEMV technology offers a few advantages for the user. Vibration stress relief on metal is alternative to stress relief annealing

The innovative procedure is utilised in order to reduce stresses in metallic components once again, e.g. the distortion as a consequence of welding processing operations


WB110 Report WM811 Chapters


WB115 Investigation reports


WB117 WIAP Single Detail Reports


WB120 Press releases


WB130 MEMV Brochures


WB135 Druckdokumentation


WB140 Various


WB150 Custom work MEMV® System


WB165 WIAP® MEMV® Delivery range














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www.wiap.info                       new website cw

www.wiapwidmers.info          WIAP education

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www.metallentspannen.ch      Metal stress relief


MEMV Metal relax with vibration

Already decades ago, it was proposed that in the metal by the machining caused by shaking or vibration of the workpiece. For this purpose the workpiece is placed on a vibrating table or by means of a mounted vibrating device shaken or vibrated. This can take about 5 to 30 minutes. For larger and heavier workpieces were also important longer vibrational times are known, which is, however, different reasons. When vibrating, the residual stresses over the whole workpiece, so not only on the surface. The workpiece can be further processed. Of the tension release is the strongest at the beginning of vibration, however, effectiveness then flattens quickly. This procedure is often connected with several unknowns and requires some and knowledge or appropriate guidance. Although it has numerous advantages compared to the heat dissipation, namely low time and energy expenditure, avoiding heat distortion and of scale contamination of the workpiece, the use of the vibration relaxation often spared.


There are three types of residual stresses. The self-tensioning of the first kind is macroscopic and is produced thermally by the edge and the core of a workpiece after appropriate heating cool down quickly. With the residual stresses of the second kind comes by phase transformations or formation of excretions local microstructures. In the case of the residual stresses of the third kind dislocations are surrounded by a stress field.


A prerequisite for the proven and successful shape stabilization by vibration is a reduction of the macroscopic residual stresses in the workpiece, that is, the stresses of the first kind requires at least a local crossing of the flow boundary, which is influenced by various factors. They are called high residual stresses, which are superimposed by rectified load voltages or local excesses of load and residual stresses through notches, cracks or flaws.





Picture 1: Jim Widmer




Picture 1: Sven Widmer









New generation 2019
WIAP MV 05 for 5 tons, MV 20 for 20 tons,
MV 50 for 50 tons, MV 100 for 100 tons
Weigh weights








WIAP VSR vibration relax




WIAP DM4C machine bed vibration relaxation WIAP MEMV Sweden hp/1cw




Control unit WIAP MEMV with protocol





A very good alternative to: BONAL MEAT LAX, Formula 62, VSR Vibratory stress relief with vibration. New patented system from Switzerland WIAP MEMV, metal relax .. Unique Process reliability with vibration.


The MEMV technology offers some advantages for the user. Metal relax with vibration is more than an alternative to stress relieving, metal relax with vibration gives no delay after the MEMV (metal relax with vibration)
Treatment. Low-stress annealing usually tightens the component to its original position as before straightening. Whether flame-directed or hydraulically straightened, no distortion after MEMV treatment and no distortion after processing.

The innovative process is used to reduce stresses in metallic components, such as distortion due to welding. Deflection by flame or hydraulic straightening. The delay when components break down by tensions machining, which hinder the precision by discarding. MEMV vibration before finishing prevents distortion.

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