摘 要在机械加工中，车床是用得最为广泛的机械加工工具。作为重要的车削加工机床，CA6140 机床广泛的应用于机械加工行业中，本文是设计 CA6140 车床刀架上部零件加工工艺规程及精车专用夹具的设计，其内容包括：零件的作用、零件的工艺分析、定位基准的选择、工艺路线的制定、切削用量及基本时间、辅助时间确定和夹具设计等，系统地体现所学过的知识。机床夹具可分为通用夹具、专用夹具、可调夹具、组合夹具和自动线夹具等。机床夹具的构造可概括为定位元件、夹紧装置、夹详细、对刀或导向装置连接元件、其他装置或元件等[3]。在机械加工中，分为粗加工和精加工，对于某些规定高的零件，必须进行精加工，在精车专用夹具中，根据工件的质量比较均匀的特点采用了定心和定位夹紧，使定位误差很小，完全可以满足加工精度规定。关键词: 刀架；工艺设计；精车夹具；定位误差ABSTRACT In mechanical processing, the lathe is used most widely for machining tool. As a major turning processing machine, CA6140 machine widely used in mechanical processing industry, this paper is the design of special fixture design for CA6140 lathe processing the upper parts of procedures and finishing, its content includes: the parts, parts of the process analysis, localization datum choice, the process of making, cutting parameters and the basic time, time to determine and fixture design, system of learned knowledge. The fixture can be divided into general fixture and special fixture, adjustable fixture, fixture and jig automatic line. Machine tool fixture structure can be summarized as positioning devices, clamping device, fixture, tool or guiding device, connecting element, other devices or components. In mechanical processing, divided into roughing and finishing, for some parts of the high demand, must be refined, in fine car special fixture, according to the characteristics of the workpiece quality uniform centering and positioning and clamping of the use, so that the positioning error...
