ABSTRACT High Manganese steel ASTM A128 is a very hard metal and production of components using a conventional machining process is very difficult and also the quality of the products are not favorable for the efficient function. Wire Electrical Discharge Machining (WEDM) is an emanating approach in the non-conventional machining process to produce intricate products with more accurate and precise. The WEDM process is affected by the number of process factors. Hence, appropriate process factor combination is necessary for achieving economical and quality machining. In this investigation, the process factors which include Peak-current Wire-feed, Open-circuit voltage, and Time-off have been considered and Central Composite Design (CCD) was implemented to layout the exploration. Response Surface Methodology (RSM) was utilized to learn the correlation between process factors and to develop mathematical models for responses which include Surface roughness Ra, Rq and Rz, Hardness, and Material Removal Rate (MRR). Analysis of Variance (ANOVA) scrutiny unveiled that the factor Peak-current is the foremost influencing process factor for MRR and Surface roughness parameters. Open-circuit voltage and Wire-feed are the primary influencing process factors for Hardness. The results of verification test showed that the developed mathematical models were good with sufficient accuracy.

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线切割加工高锰钢的试验研究

摘要 高锰钢 ASTM A128 是一种非常硬的金属，使用传统的机械加工工艺生产部件非常困难，而且产品的质量也不利于高效功能。线切割加工 (WEDM) 是非常规加工过程中的一种新兴方法，可以更准确和精确地生产复杂的产品。WEDM 工艺受工艺因素数量的影响。因此，适当的工艺因素组合对于实现经济和高质量的加工是必要的。在本次调查中，考虑了峰值电流送丝、开路电压和超时等工艺因素，并实施了中央复合设计（CCD）来布局探索。响应表面方法 (RSM) 用于了解工艺因素之间的相关性，并为响应开发数学模型，其中包括表面粗糙度 Ra、Rq 和 Rz、硬度和材料去除率 (MRR)。方差分析 (ANOVA) 审查表明，峰值电流因素是影响 MRR 和表面粗糙度参数的首要工艺因素。开路电压和送丝是影响硬度的主要工艺因素。验证试验结果表明，所建立的数学模型良好，具有足够的精度。方差分析 (ANOVA) 审查表明，峰值电流因素是影响 MRR 和表面粗糙度参数的首要工艺因素。开路电压和送丝是影响硬度的主要工艺因素。验证试验结果表明，所建立的数学模型良好，具有足够的精度。方差分析 (ANOVA) 审查表明，峰值电流因素是影响 MRR 和表面粗糙度参数的首要工艺因素。开路电压和送丝是影响硬度的主要工艺因素。验证试验结果表明，所建立的数学模型良好，具有足够的精度。