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长期以来,钢球表面质量没有完善的检验方法,靠工人同志用肉眼在白炽灯下将钢球浸在汽油中进行抽检或在40倍显微镜下放大进行抽检。这样,工人检查的劳动强度高,检验效率低,不能对钢球进行100％的检验,就难免出现漏检现象。 为了有效地保证轴承质量,我厂组成了以工人为主体的三结合小组,并在上海遵义电表厂的大力支持协助下,经过摸索,探讨出用电子仪器来检验钢球的新方法。由于两厂革命职工高举毛泽东思想伟大红旗,勇于实践,勇于斗争,并且不断地总结经验和教训,克服了许多困难,终于在半年多的时间里,于1969年10月1日试制成功第一台钢球涡流探伤仪。本仪器特点是不破坏试件,对钢球的半成品、成品进行快速的100％检查。经过两年的试验和应用,仪器的性能和对裂纹的鉴别能力良好。 钢球涡流探伤仪的技术性能（在环境温
For a long time, the quality of the surface of the steel ball is not perfect test method, by the workers comrade with the naked eye under the incandescent bulb soaked in gasoline sampling or magnification at 40 times the sampling. In this way, workers check the high labor intensity, the inspection efficiency is low, the ball can not be 100% of the test, it is inevitable missed inspection phenomenon. In order to effectively ensure the quality of bearings, our factory has formed a three-in-one group with workers as its main body. With the help of the support from Shanghai Zunyi Electric Meter Factory, we explored the new method of testing steel balls with electronic instruments. As the revolutionary workers of the two factories overrun the great red banner of Mao Zedong Thought, bravely practiced and brave in their struggle, and constantly summing up experiences and lessons, overcame many difficulties and finally succeeded in making the first successful trial on October 1, 1969 in more than half a year Steel ball eddy current flaw detector. The instrument features is not damaged specimens, semi-finished steel balls, finished products for rapid 100% inspection. After two years of testing and application, the performance of the instrument and the identification of cracks are good. Steel ball eddy current flaw detector technical performance (at ambient temperature