当你看到杂志上形象而生动的插图的时候,可曾想到这些插图是怎样印出来的吗?原来它们大都是用金属图版印制的,这些图版好象金属“图章”。不过,它们的“刻”法很特别,不是用刀一点一划刻出来的,而是利用所谓照象腐蚀加工方法制出来的。这就是通过照象将图片复制到金属版上,并将金属版上没有图象点线的部分腐蚀去一薄层,让图象本身凸现出来。现在,这种在印刷技术上习用的老方法,居然成了机械工业中的一门新工艺。为什么照象腐蚀方法能用来加工机械零件呢?近代科学技术的迅速发展,向机械工业提出了新的任务。许多电子仪器、光学仪器、计算机、液压控制系统、导弹导航系统等都需要用到一些形状复杂的薄板零件。它们的产量往往不要求很多,单件、小批生产就行了。可是,在一片仅仅零点几毫米的薄板上 When you saw the vivid and vivid illustrations in the magazines, did you ever think of how these illustrations were printed? Originally they were mostly printed with metal plates. These plates are like metal “stamps.” However, their “engraving” method is very special. Instead of using a knife to scribing it one by one, it is made using the so-called photo etching method. This is done by copying the picture onto the metal plate by photocopying, and etching away the part of the metal plate where there is no image dotted line to a thin layer, so that the picture itself is highlighted. Now, this old method used in printing technology has become a new process in the machinery industry. Why does the photoetching method be used to machine mechanical parts? The rapid development of modern science and technology has brought new tasks to the mechanical industry. Many electronic instruments, optical instruments, computers, hydraulic control systems, missile navigation systems, etc. require the use of thin-walled parts with complex shapes. Their production often does not require much, single-piece, small batch production on the line. However, on a thin sheet only a few tenths of a millimeter