摘要: 对于拉延成形工艺来说,拉延筋在防止板料起皱和拉裂方面起着至关重要的作用.合理设置拉延筋,不但能提高拉延模具的稳定性,降低废品率,而且还可以保证制件成形的刚性,提高板料的利用率.关键词:拉延筋 冲压成形 拉延成形 塑性变形 起皱 布置原则 表面缺陷 外板件 ...
PROBLEM TO BE SOLVED: To provide an ignition device for an internal combustion engine devised to have an overspeed preventive function without spoiling ignition performance at the time of low speed.;SOLUTION: Triangulart waveform engine speed detection voltage VN is generated by giving a rectangular ...