共查询到19条相似文献,搜索用时 62 毫秒
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分析高速铣削中切削力变化机理,建立高速球形铣刀的材料去除率与切削力之间以及材料去除率与进给速度之间的模型,提出在高速铣削加工过程中可通过调节进给速度控制恒定的材料去切除率从而保证切削力相对稳定.并通过实际使用验证这种方法的有效性. 相似文献
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介绍了高速切削加工技术在模具制造中的应用优势,以及高速切削加工模具型腔的工艺方案,主要包括加工方法、刀具和应用PowerMILL软件在模具型腔加工中的加工策略等内容。以塑料玩具兔注射模型腔的制造为例,应用PowerMILL软件给出了工艺方案和高速切削加工参数。 相似文献
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薄壁铝合金高速铣削工艺寻优及模拟仿真 总被引:1,自引:0,他引:1
本文详细讨论了薄壁零件的加工技术.首先,以CAXA软件为技术平台,自动生成零件的刀具路径,并进行了模拟仿真加工;针对薄壁零件刚性差、强度弱、加工工艺性差、易发生加工变形和切削振动等情况,决定采用高速加工技术.通过对机床、刀具、工件以及切削参数等进行全面分析,采用了刚度大的高速切削机床,并选择了合适的切削刀具.通过改变工件装夹方式,优化编程策略和合理选用切削用量,实现了薄壁零件的高速干式切削. 相似文献
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简要地介绍了高速铣削加工在压铸模制造中的应用,论述了压铸模高速铣削加工的工艺特点.并对压铸模高速铣削加工与传统加工进行了比较. 相似文献
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This paper describes the high speed EDM milling of 3D cavities using gas as the working fluid. In this new process, the molten workpiece material is removed and flushed out of the working gap with the help of high-pressure gas flow. The advantages or this technique are the remarkably small tool electrode wear and the significantly high material removal rate especially when oxygen gas is used due to the extremely strong oxidation of steel workpieces. Experiments showed that the material removal rate increases dramatically when the discharge power density on the wonting surface exceeds a certain threshold due to thermally activated chemical reaction between the gas and workpiece material. The maximum removal rate obtained was almost equal to that of high speed milling of quenched steel by a milling machine. The machining accuracy was considerably better when the gas was sucked through the pipe electrode than Jetted. 相似文献
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High speed machining of aluminium silicon alloy castings has gained significant interest from automotive industry involved in the development of the new generation of lightweight vehicles. This paper investigates the influence of workpiece microstructure, namely the secondary dendritic arm spacing (SDAS), tool material and geometry on tool wear mechanisms, cutting forces and surface integrity when face milling at cutting speeds of 5,000 m min−1. It was found that the SDAS is the parameter with the main influence on tool wear rate; higher SDAS values require polycrystalline diamond (PCD) tooling due to the lower wear rates when compared with carbide tools. Finite Element Analysis (FEA) was employed to study the influence of tool wear on temperature and shear stress distribution in the workpiece material. 相似文献
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针对难加工材料Ti6Al4V(TC4)进行高速铣削的铣削力研究,通过多因素正交试验,分析切削参数对切削力的影响,得出对难加工材料宜采用高速小切削的方法加工。将铣削加工中的切削力分解为纵向铣削力、横向铣削力和轴向铣削力,根据铣削力和切削加工参数之间的关系,采用最小二乘法等概率统计方法和回归分析原理,建立了三向铣削力模型。对所建立的铣削力模型进行回归参数显著性检验,分析所构建模型的置信度和残差,结果表明所建立的铣削力模型能很好地符合原始实验数据,可靠性好,能用于铣削力的预测和控制,为高速铣削钛合金的参数优化提供可靠依据。 相似文献