溶接における強度の多元的評価

概要

論文の詳細を見る
The authors showed in a previous report that technical levels of 12 welders were able to be evaluated to some extent by synthesizing plural strengths of welded products multi-dimensionally and that some contradictions among individual strengths were also found. This paper investigates strengths of welded products from a standpoint of testing methods. Ability of each testing method to detect various changes in strength determined by welding conditions is compared using the method of statistical SN ratio. In results, it is found that fatigue test has a rather high ability to detect the degree of skillness of weld workers, Sharpy V-notch impact test has the poorer one and tensile test has the intermediate ability between the two. The results of face bend test and visual test, based on human judgement of surface states of specimen, are found to agree well with those of fatigue test. A large personal error, however, is found in the judgement of visual test (sensory test). It is considered that an experiment based on the approach described in this report is very effective for a betterment of strength quality of products and an improvement of processing technique.
公益社団法人精密工学会の論文
1988-06-05