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1983年6月14～17日,济南第二机床厂、上海交通大学、上海飞乐电声总厂联合举办的扬声器导磁体镦挤成形工艺鉴定、500吨镦挤压力机评议会在济南召开。会上,三个主办单位分别介绍了“500吨镦挤压力机的结构与性能”、“镦挤复合成形变形力的上限法分析”“扬声器导磁体镦挤成形工艺”。与会代表观看了镦挤工艺和设备的现场表演,并进行了讨论和评议。
1983 June 14 ~ 17, Jinan Second Machine Tool Works, Shanghai Jiaotong University, Shanghai Feile electroacoustic Plant jointly organized by the speakers of the magnetic heading upsetting process identification, 500 tons upsetting squeeze press council held in Jinan . At the meeting, the three organizers introduced the structure and performance of the 500-ton upsetting extrusion press, the upper limit analysis of the deformation force of the upsetting and extruding compounding, and the upsetting and forming process of the speaker magnet. Participants watched the upsetting extrusion process and equipment live performances, and conducted discussions and comments.