我厂生产对象为中小型立车系列产品及冶金、车辆制造用的专用机床,属于单个小批生产性质。各种箱体种类很多,几年来在检查箱体孔距及孔系轴心线平行的同心检棒、检套方面,已经积累了相当多的工艺图纸,但由于设计上缺乏统一的技术指导资料和技术管理制度不健全曾产生过以下几种 I plant for the production of small and medium-sized vehicles legislation legislation and metallurgical vehicles, vehicles used for manufacturing machine tools, belonging to a single small batch of nature. There are many kinds of cabinets. In the past few years, a considerable number of technical drawings have been accumulated in inspecting the hole pitch of the box and the concentric inspection rods and jacketed concentric axes of the hole lines. However, due to the lack of uniform technical guidance materials And technical management system is not perfect Have produced the following kinds