第一汽车制造厂机电分厂创制了一个半自动洋冲子,大大地减轻了划线工的劳动强度,使工作效率提高一倍。其结构及工作原理可参阅附图。使用时将冲针垂直对准应打洋冲眼处,然后在螺帽1处施以轻微的推力,冲针11即向上移动,小弹簧11被压缩,芯子8也被顶起,大弹簧6同时被压缩。这时销? The first automobile factory electromechanical branch created a semi-automatic Yang Chongzi, greatly reducing the labor intensity of scribes, double the work efficiency. Its structure and working principle can refer to the attached drawings. When used, the red needles should be vertically aligned with the eye, and then a slight thrust is applied at the nut 1, the red needles 11 move upward, the small springs 11 are compressed, the core 8 is also lifted, and the large spring 6 is compressed at the same time. When the pin?