Agricultural Engineering, Volume 49 (2017)


Alexey Tatarinov, V. Mironov, D. Rybak, P. Stankevich
Riga Technical University


Abstract: Possibilities of non-destructive testing (NDT) methods to assess the quality of permanent joints of powder metal parts were evaluated. Antifriction bushing-bushing couples used in transport braking systems were investigated. The parts made of bronze graphite were crimped by pulsed magnetic deformation by means of electromagnetic equipment with a maximum discharge energy of 30 kJ. The gap between joint parts in the couples was assessed by ultrasonic and radiographic methods. A standard ultrasonic flaw detector Krautkramer USM-25 with an Olympus 4MHzdual-element echo transducer and an industrial x-ray apparatus YXLON EVO 200D were used, correspondingly. In first trial, both methods were equally sensitive to tight and weak connection of joints, however, further studies are necessary to find quantitative estimations of the mechanical integrity. If not limited by the object size, the ultrasonic method is easier in application and can be standardized for use in production lines.

Keyword(s): powder metal joints, ultrasonic testing, radiography, electromagnetic crimping


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Agricultural Engineering ISSN 1392-1134 / eISSN 2345-0371

This journal is published under the terms of the Creative Commons Attribution-Noncommercial 3.0 Unported License. Responsible editor: Dr A. Žunda.