Vibration test for nuts and bolts

Vibration test for nuts and bolts 20 July 2015

In a bolted joint designed correctly according to VDI 2230 the bolt performs a clamping force, which prevents the opening of the clamped parts despite external forces. The clamped parts behave like a single part and withstand all external loads. If they move against each other there is potential for the loosening of the bolted joint and the bolt may be lost or broken.

In reality it is often impossible to design bolted joints in a way that withstands external loads. However, it is not only the design that may enable movement of the bolted joint. In automotive construction there are bolted joint connections with very long bolts that can undergo elastic deformation under external loads and thus create a critical load on the bolt even if the fastening parts do not move.

SCHATZ AG has therefore developed equipment for vibration testing, which consists of a drive unit with adjustable displacement; a force sensor for transversal load; a measuring device for displacement; and a changeable transducer with adaptors for different fastener dimensions for measuring clamping force and thread friction.

All assembly procedures, including torque, angle, clamping force or yield point assembly, can be monitored. Displacement and frequency can be controlled by the measuring and control unit during the testing sequence.

Other features of the SCHATZ test equipment include:

• Test range M6 to M24.

• Measuring of clamping force and thread torque (thread torque, torsion torque and loosening torque).

• Adjustable displacement (max. +/- 2mm) and frequency (0Hz – 20Hz) by software.

• All torque/angle assembly procedures are supported.

• Application as stand-alone system or in combination with laboratory system.

Fastener Testing

Content Director

Biog

Fastener Testing

Fastener Testing