去年,我厂冲床改造小组试制成功一种全行程可控式冲床安全装置。该装置由光电和机械两种形式结合构成,包括光电控制、电磁铁、离合器和行程控制凸轮四部分(见示意图)。 其工作过程如下:当操作者的手进入光电控制区时,切断光源22与硅光电池21之间的光线,使电路断电;电磁铁3放松, Last year, our factory made a full-stroke controlled punching safety device successfully. The device consists of a combination of optoelectronic and mechanical forms, including photoelectric control, electromagnet, clutch and stroke control cam four parts (see diagram). The working process is as follows: when the operator’s hand enters the photoelectric control area, the light between the light source 22 and the silicon photovoltaic cell 21 is cut off, so that the circuit is powered off; the electromagnet 3 is relaxed,