基于响应曲面法切削温度变化规律及粘焊影响

摘要

为了研究硬质合金刀具切削不锈钢材料时刀屑粘焊的临界条件,并获得切削参数对切削温度及粘焊累积的影响规律,采用Design-Expert软件响应曲面法进行分析.通过三因素三水平试验建立了在硬质合金刀具切削1Cr18Ni9Ti不锈钢过程中切削温度的预测模型,并对相应的回归模型进行了分析,证明了预测模型以及对应因素的显著性.结果表明:该预测模型较为准确,具有较好的可靠性和实用性;刀屑粘焊的温度区范围一般不超过800℃;刀具前刀面粘焊微观形貌呈现一定程度的颗粒扎堆状态;切削速度和进给量的交互作用对切削温度的影响最为显著.%In order to investigate the critical conditions of tool-chip sticking welding when the carbide tool is used for cutting stainless steel materials, and obtain the influence law of cutting parameters on the cutting temperature and sticking welding accumulation, the response surface method (RSM) with Design-Expert software was used.According to three factors and three levels for the test, the prediction model for the cutting temperature in the process of cutting 1Cr18Ni9Ti with the carbide tool was established, the regression model was analyzed, and the significance of the model and its corresponding factors were proved.The results show that the proposed prediction model is accurate, and has the reliability and practicability.The temperature range of tool-chip sticking welding is generally not more than 800℃.In addition, the sticking welding microstructure of tool rake face exhibits the particle clustering state, and the interaction of cutting speed and feed rate has most significant effect on the cutting temperature.