1、 I 连杆加工的数控编程 摘 要 连杆是发动机的关键零件，主要承受高温气体压力和往复惯性力所产生的拉 伸、压缩、弯曲等高频交变载荷，服务条件恶劣，运动状态复杂，疲劳、磨损、 高温、振动等影响连杆的使用寿命。因此连杆必须具有足够的疲劳强度、刚度与 综合机械性能，制造精度要求很高，且连杆零件小而型面复杂、空间尺寸不便测 量，加工部位多，形位公差部位多且要求严格，加工中难以控制。针对零件结构 特点、精度要求及加工的难易程度，采用数控加工的方法。数控加工不但可以极 大地提高精度，包括加工质量精度及加工时间误差精度，而且可以稳定加工质量， 保持加工零件质量的一致。数控技术在制造业的广泛运用，使当今的制造
2、业生产 面貌焕然一新。本文根据连杆的结构特点和加工要求，阐述了连杆的工艺设计及 其具体内容，通过对被加工零件的工艺分析，运用所学数控技术知识，对某些工 步进行了数控编程。 关键词：连 杆，加工工艺，数控编程 II 英文题目 ABSTRACT Connecting rod is the key parts of engine, it main bears high temperature gas pressure and reciprocating inertia force generated by stretching and compression, bending high freque
3、ncy alternating load, service conditions, motions complex, fatigue, wear, high temperature, the influence of vibration using life. Therefore it must have enough connecting fatigue strength, stiffness and mechanical properties, manufacturing precision demanding, and the connecting rod part has the fe
4、atures as small and complicated structure, hard to measure the dimensions, many positions need to process, has strict requirements on position tolerances and hard to control during machining. It adopts CNC processing method for parts structure characteristics, accuracy and processing difficulty. NC
5、machining not only can greatly improve the accuracy, Including processing quality precision and processing time error precision, but also can stable machining quality, keep the consistent quality processing components. Numerical control technology is widely used in manufacturing industry, it makes t
6、odays manufacturing appearance to look brand-new. According to the structure characteristics of the connecting rod, it expounds and process requirements of process design and connecting the specific content. Based on the analysis of the technology of processed spares, I use to the learned numerical control technology knowledge, making the CNC programming for some workers step. KEY WORDS: Connecting rod, Processing technology, NC programming III 目 录 前 言 1 第 1 章 数控加工的概述 3 1.1 数控加工 3 1.2 数控加工技术的发展
