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HBM, which offers products and services for measurement applications, has launched a patented hole-drilling rosette to increase the accuracy of residual stress measurement by a factor of five.

In the hole-drilling method, which is one of the most common methods of determining residual stresses in components, strain gauges (SGs) determine the deformation – or relaxation strain – around a drill hole while it is being drilled.

Residual stresses are mechanical stresses that exist in a material without external forces or moments acting on the component.

They can occur in metallic workpieces during production caused by, for example, uneven cooling during casting or by rolling.

Residual stresses affect the component in the same way as load-induced stresses and can reduce its load-carrying capacity.

It is essential for manufacturers to determine the residual stresses in any component to ensure operational reliability.

HBM’s new RY61M SG hole-drilling rosette has a patented structure that utilises six measuring grids instead of the customary three to determine the eccentricity of the hole, which is a potential source of error.

The hole-drilling rosette measuring grids are arranged around the drill hole, with each of the opposite SG pairs being interconnected so that their signals are averaged.

The measurement error resulting from drill-hole eccentricity is reduced by a factor of five because HBM uses six measuring grids.

The RY61M SG is said to be easily connected as the measuring grids are already connected on the carrier foil or on a small printed circuit board.

HBM UK Ltd

Our extensive range covers everything from strain gages via measuring transducers to analog and digital amplifiers. Since our amplifiers can be connected to a PC, measured values can be further processed and then meaningfully displayed with the aid of operator-friendly analysis software specifically designed for measurement technology.

Our extensive range covers everything from strain gages via measuring transducers to analog and digital amplifiers. Since our amplifiers can be connected to a PC, measured values can be further processed and then meaningfully displayed with the aid of operator-friendly analysis software specifically designed for measurement technology. Innovative new products in the field of transducer development, signal conditioning and software are witness to our competence and up-to-date product know-how.

In addition to these standard products, HBM also provides customized solutions for sensor technology and electronics as well as complete systems. Our products and solutions are used in all sectors of industry. Our subsidiary companies and over 60 branch offices and agencies worldwide are responsible for providing expert support for measurement technology solutions on site.

The “complete measuring chain from one supplier” approach has many advantages:
The complete measuring chain comes from HBM. This means that all components in a system are adapted to work with one another.
Just one point of contact for everything you need. This saves you both time and money.
Our long experience means we understand your needs. Practical solutions come naturally to us.

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