单颗磨粒切削氮化硅陶瓷表面残留高度研究

• 作 者: 万林林 刘志坚 邓朝晖 刘伟
• 机 构: 湖南科技大学智能制造研究院,湖南科技大学难加工材料高效精密加工湖南省重点实验室,
• 出 处: 兵器材料科学与工程
• 发表日期: 2017年02期
• 关键词: 氮化硅陶瓷 未变形切屑厚度 残留高度 平面磨床 正交实验结果 裂纹扩展 加工参数 切削加工 磨削力 工程陶瓷

基于单颗磨粒切削路径规划和未变形切屑厚度模型,建立加工表面残留高度与加工参数之间的关系模型。在高精度数控平面磨床上进行单颗磨粒切削氮化硅陶瓷加工实验,结果表明残留高度与与切削力呈正相关关系。当材料去除方式为以脆性裂纹扩展控制的断裂破碎时,加工表面残留高度现象相对明显。通过对正交实验结果进行分析,获得有助于降低表面残留高度的加工参数组合,可用于指导实际磨削加工,并通过磨削实验进行验证。

Based on single abrasive particle path planning and undeformed chip thickness model, the relationship model between the machining surface residual height and machining parameters is established. In a high-precision CNC surface grinder single abrasive cutting silicon nitride ceramic processing experiments, the results show that the residual height and the cutting force was positively correlated. When the material removal method is controlled by the brittle crack propagation fracture, the processing of surface residual height phenomenon is relatively obvious. By analyzing the results of orthogonal experiments, the combination of machining parameters that help to reduce the surface residual height can be used to guide the actual grinding process and to verify it by the grinding experiment.