Rising quality requirements have caused the traceability of the geometrical alignment of materials testing machines to increase in importance. Precise alignment prevents the risk of false measurements.
ZwickRoell offers alignment as well as measurement and recording the alignment of your materials testing machines.
Nadcap stands for "National Aerospace and Defense Contractors Accreditation Program" and was originally a global accreditation program for suppliers to the aerospace and defense industries. Nadcap's goal is to generate economical approaches to special processes and products and promote continual improvement within accredited companies.
In contrast to certification of quality management systems as per ISO 9001 and EN 9100, Nadcap accreditation includes both detailed examination of special technical processes and an audit with regard to the observance of defined specifications and guidelines. Aerospace industry manufacturers and suppliers in particular define extremely demanding requirements for the technical and staff qualifications of testing laboratories. These requirements are specified in standards, directives, and audit criteria, and are checked through Nadcap audits allowing maximum process stability to be attained and standardization of quality guaranteed.
Alignment measurement is a component of Nadcap accreditation and is based on ASTM E1012, which stipulates compliance with defined tolerances.This is reflected in Nadcap-defined audit criteria AC 7101 and AC 7122, which define the conditions for the measuring procedure, that is the verification of test axis alignment.In addition to aerospace manufacturers and service providers, an increasing number of companies in other sectors are affected by alignment measurement as part of Nadcap accreditation requirements, for example in the mechanical and plant engineering industry and in the metals industry.
Misalignments can be especially common with brittle materials. Stiff and brittle materials break with seeming low tensile stress and strain in the area of the largest bending. This is where ZwickRoell's alignment services come into play: a highly developed procedure enables visualization of the specific bending strain with the help of strain gages and reporting to initiate required measures for alignment.
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Based on ASTM E1012, strain-gaged alignment transducers, which preferably conform to the geometry of the specimen to be tested at a later time, are required. An experienced ZwickRoell service technician positions the strain-gaged alignment transducer in the test axis of your testing system and it is then loaded in the elastic range.
In the event of non-uniform force application to the specimen, the applied strain gages will register different strains. These are digitalized through a connected electrical measurement amplifier and transferred to a special testXpert software test program. Material properties are determined and logged in testXpert according to standard specifications and specimen geometries. A simple, structured evaluation in testXpert II enables a ZwickRoell service technician to identify errors in the test axis on the basis of characteristic measurement results. If necessary, measures can be taken using components specifically developed for alignments to resolve alignment errors. In addition, testXpert provides adjustment recommendations for the alignment unit option, allowing detected alignment to be corrected easily and conveniently.
Our standardized strain-gaged alignment transducer works with a large percentage of the materials testing machines to be tested. Furthermore, defined geometry data can be used with strain-gaged alignment transducer according to your specific requirements.
Our equipment and tools meet the highest quality standards. This ensures precise alignment measurement to identify possible bending influences in your test axis.