左俊彦,林有希,何明.基于粘着特性的刀具磨损机理研究[J].表面技术,2019,48(7):364-370.
ZUO Jun-yan,LIN You-xi,HE Ming.Tool Wear Mechanism Based on Adhesion Characteristics[J].Surface Technology,2019,48(7):364-370 |
| 基于粘着特性的刀具磨损机理研究 |
| Tool Wear Mechanism Based on Adhesion Characteristics |
| 投稿时间：2018-11-05 修订日期：2019-07-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.07.042 |
| 中文关键词: 铍铜合金 硬质合金刀具 高速铣削 粘着特性 |
| 英文关键词:beryllium copper cemented carbide tool high speed milling adhesion characteristics |
| 基金项目:国家自然科学基金（51375094）；福州市科技计划项目（2018G57） |
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| 中文摘要: |
| 目的 为了满足日益凸显的铍青铜加工需求，分析粘着特性、加工系统和刀具损伤之间的内在联系。方法 通过建立加工过程中刀具微观晶体受力模型，采用多维度正交实验方法，分析刀具接触面表面形态与力学波动的内在联系。尝试从刀具受力、频谱分析和粘着形式出发，解析刀具磨损、铣削特性和粘结过程，并通过扫描电子显微镜对磨损后的刀具表面及粘结物形貌进行了分类表征。结果 在相同的切削速度下，加工中的粘着现象随着刀具直径的增大而加剧。而由于铣刀前-后刀面粘结物受力环境的差异，导致加工参数仅对Fx变化显著。对比粘结物形态、刀具损伤形态和不同加工参数下的刀具形貌，综合考虑刀具粘结物、磨损、破裂和脱落表面形态，不稳定的粘附过程虽然在加工的初期对刀具表面存在一定的保护作用，但随着粘结物的不断累积，粘结物侧向受力的不断增加，加剧了刀具的实际损伤。结论 粘着特性是影响刀具使用寿命的重要因素。在实际加工过程中，由于冲击和磨损频率的相互干扰，增加了粘附特性对刀具磨损的影响。 |
| 英文摘要: |
| The work aims to analyze the internal relations among the adhesion characteristics, processing system and tool damage to satisfy the increasingly prominent processing needs of beryllium copper. The multidimensional orthogonal test method was adopted to analyze the internal relations between the morphology of the tool's contact surface and force fluctuation by establishing the mechanical force model of the tool’s microscopic crystal. The wear, milling characteristics and bonding process of the tool were analyzed from the force, spectrum analysis and adhesive form, and the tool surface and the morphology of the adhesive after wear were classified and characterized by scanning electron microscope. The adhesion in machining increased with the increase of tool diameter at the same cutting speed, and the processing parameters were only significantly changed to Fx due to the different force environment of tool adhesive before and after milling. By contrasting the form of adhesive and tool damage and the tool morphology under different processing parameters, the surface form of tool adhesive, wear, breakage and falling was considered. Unstable adhesion process had certain protective effect at the beginning of the processing, but as the adhesive increased continuously, the lateral force of adhesive also increased, which increased the actual damage to the tool. Adhesion property is an important factor affecting tool life in the actual processing, and the mutual interference of impact and wear frequency increases the effect of adhesive property on tool wear in the actual processing. |
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