1、 I 数控加工切削参数优化分析 摘 要 近年来，数控技术正向着高效率、高精度和高智能化方向快速发展。因此，为提高数控机床的自动化生产程度，以精度和效率为目标，优化各种数控加工的参数，并把优化的参数进行优选，是一个既紧迫又极具有实际意义的问题。 数控加工刀具运动轨迹是确定数控加工工艺的重要环节。刀具运动轨迹设计质量的好坏，将直接影响零件的加工质量及加工成本。由于球头铣刀是复杂曲面加工的主要刀具，球头铣刀切削力是选择机床、刀具、夹具及实现铣削加工工艺参数优化的基础。故本文对球头铣刀的运动轨迹优选进行了理论研究 。 由于在数控加工过程中，特别是复杂曲面加工过程中，切削条件不是一成不变的，但在目前的数
2、控加工中大都是人为的选择保守的切削参数，并且在加工过程中保持切削参数不变，从而大大降低了数控机床的生产效率。 在数控加工中，正确合理地选择切削参数对确保产品质量、提高生产率、降低生产成本起着十分重要的作用。近年来，随着数控 (NC)技术的普遍应用，以及各种先进制造技术的迅速发展，生产辅助时间大大降低，相应地，切削时间所占的比重就大大提高。因此缩短切削加工时间，对提高生产效率起着非常重要的作用。 目前，大多数工厂在生产中 凭经验或参考切削用量手册来选择切削用量，这往往达不到切削参数的最优选。运用现代切削理论、数学建模和模型分析方法寻求切削参数的最优组合，是切削参数选择的一个重要方向。 这里主要讨
3、论了在数控机床上的切削加工中，求取优化的切削用量的方法。详细给出了求取优化的切削用量的框图和实际例子。提出一种切削加工艺参数优化的方法，采用该方法获得的切削参数能有效地提高加工效率，将工艺人员从大量的手工重复劳动中解放出来，并实现切削参数选取的科学化、合理化、规范化，为企业创造出良好的经济效益。 关键词 :数控，优化，工艺参数，切削用 量 II CNC machining parameter optimization analysis ABSTRACT In recent years, digital technology is toward high-efficiency, high pre
4、cision and high intelligent direction rapidly. Therefore, in order to improve the degree of automation of CNC machine tools, precision and efficiency as the goal to optimize a variety of CNC machining parameters and the optimized parameters were optimized, is both urgent and very practical significa
5、nce. CNC machining tool is to determine the trajectory of an important part of CNC machining process. Tool trajectory design quality is good or bad, will directly affect the quality of the machining and processing costs. Since ball mill is the main complex surface machining tool, ball milling cuttin
6、g force is to select tools, tools, fixtures and the milling process parameters optimization. Therefore, this paper trajectory ball mill is preferably carried out a theoretical study. As the CNC machining process, especially in complex surface machining process, the cutting conditions is not static,
7、but in the current NC machining mostly artificial selection conservative cutting parameters, and in the process of cutting parameters remain unchanged, thus greatly reduced the productivity of CNC machine tools. In CNC machining, cutting parameters correctly reasonable choice to ensure the product q
8、uality, increase productivity, reduce production costs plays a very important role. In recent years, with the NC (NC) technology, widely used, and a variety of advanced manufacturing technology is developing rapidly, production assistant time greatly reduced, and accordingly, the proportion of cutti
9、ng time is greatly improved. Therefore shorten machining time, to improve production efficiency plays a very important role. Currently, most of the factories in the production of cutting experience or reference manual to select cutting, which often reach the most preferred cutting parameters. The us
10、e of modern cutting theory, mathematical modeling and model analysis approach seeks optimal combination of cutting parameters, cutting parameter selection is an important direction. Here mainly discussed the machining on CNC machine tools, the strike cutting optimization methods. Given in detail to
11、strike the optimal cutting diagram and practical examples. Canada presents a cutting process parameters optimization method, obtained by this method can effectively cutting parameters improve processing efficiency, the craft workers from a lot of manual labor freed duplication and achieve cutting parameters selected scientific rationalization, standardization for enterprises to create a good economic benefits.
