可加工陶瓷材料可加工性的模糊综合评判

以陶瓷材料的物理、力学性能为依据,应用模糊数学中的模糊综合评判原理,建立了陶瓷材料可加工性的模糊综合评判模型,提出了一种对陶瓷材料可加工性进行综合评判的新方法。根据提出的评判方法,对几种可加工陶瓷材料的可加工性进行评价,结果表明,该方法是可行的,而且易于运用计算机来处理,具有较高的效率和准确性。     

基于区间灰色主成分分析的陶瓷磨削加工性评价

提出了一种陶瓷材料磨削加工性综合评价的新方法。基于区间分析及灰色理论,选取陶瓷材料力学性能参数作为磨削加工性的影响因素,构建区间数样本矩阵,计算区间数绝对灰关联度矩阵,由特征向量确定因素权重,得到影响因素的重要度排序以及陶瓷磨削加工性综合评价值。应用本方法对七种典型工程陶瓷材料的磨削加工性进行综合评价,评价结果客观、全面。可以为陶瓷材料的设计、合理选择陶瓷材料及加工工艺参数提供参考依据。     

可加工陶瓷材料可加工性的模糊综合评价

根据模糊数学理论提出一种可加工陶瓷材料可加工性的综合评判方法。以陶瓷材料的力学性能参数为因素集，选择五种可加工性等级，根据隶属函数计算模糊矩阵，通过模糊变换确定出可加工陶瓷的可加工性。通过对含稀土磷酸盐的氧化物复合陶瓷材料的可加工性等级分析，证明该方法是可行的。     

材料切削加工性的模糊综合评判

材料切削加工性的模糊综合评判黑龙江交通高等专科学校戴彤焱黑龙江省机械制造学校杨秀华哈尔滨理工大学张莉本文根据模糊数学的基本原理，应用模糊模式识别的直接方法，以材料的物理、力学性能为依据，提出了一种对材料切削加工性进行综合评判的方法。通过引入隶属函数，...     

基于灰关联分析的有向图法评价陶瓷材料的磨削加工性

提出一种新的陶瓷材料磨削加工性评价方法——灰关联分析的有向图法。该方法首先应用灰关联分析方法确定影响陶瓷材料磨削加工性的各种性能因素间的相关关系。在此基础上结合有向图法进行陶瓷材料磨削加工性的综合评价。以SiC、Al2O3、ZrO2和Si3N4四种陶瓷材料为例。应用该方法进行评价。评价结果能够准确地反映各种陶瓷材料的磨削加工性。     

采用有向图法评价陶瓷材料的可加工性

提出了一种陶瓷材料可加工性综合评价的新方法——有向图法，并制备出六种不同CePO4含量的Ce-ZrO2／CePO4复合陶瓷材料，进行了可加工性评价和钻削加工试验。结果表明：对材料的可加工性评价排序结果与试验结果吻合，该方法可用于陶瓷材料可加工性的评价。     

材料切削加工性度量的指标体系及评判方法

试图用指标体系来描述和评价材料的切削加工性．并借助模糊综合评判的方法予以评价，得出材料切削加工性的一个具有可比性的综合等级。     

模糊综合评判在机械设计中的应用

介绍了模糊综合评判在机械设计中的应用,并以齿轮机构材料选择为例,建立了二级模糊综合评判模型,取得了满意的结果。文章还简单介绍了模糊综合评判在滚动轴承类型选择等机械零件设计中的应用,说明在方案确定、参数及类型选择中,模糊综合评判是一种切实可行的方法。     

工程陶瓷材料磨削加工工艺研究现状与进展

工程陶瓷材料的可加工性与金属相比相差较多,其加工工艺也与金属存在很大的不同。磨削加工工艺是现今最成熟的陶瓷材料加工工艺,本文综述了近年来国内外工程陶瓷的磨削加工工艺,分析了磨床、砂轮、磨削工艺参数等因素对磨削加工的影响,并阐述了在不同工艺条件下合理选择加工参数的方法。     

基于模糊理论和数据库技术的材料切削加工性评价

通过金属数据库的用户接口输入材料的基本数据，如物理机械性能、化学成分或金相组织，对材料进行模糊聚类分析，从而使材料迅速定位；经材料切削加工性的模糊综合评判后，可获得该材料切削加工性的直观、综合了解。以库中查找的相关材料的切削用量为参数，用当前参数（或事先适当调整）进行试验研究，观察切削状况后通常需重新微调参数再进行试验，确定合理的切削用量后输入库中，更新数据。实际证明了采用这种方法可节约大量人力物     

用灰关联分析法确定性能参数对陶瓷材料磨削加工性的影响

选择反映磨削加工性系统行为的加工过程／输出参数，作为系统特征变量，选择陶瓷材料的性能参数为相关因素变量，应用灰关联分析法，分别生成各变量的处理数据序列，建立系统特征变量和相关因素变量的绝对灰关联度矩阵，利用优势分析原则确定陶瓷材料各种性能参数对其磨削加工性的影响程度。以SiC、Al2O3、Si3N4和ZrO2 4种陶瓷材料为例，应用灰关联分析法确定出4种性能参数对陶瓷材料磨削加工性影响程度的排序。研究实例表明，灰关联分析法是确定陶瓷材料性能参数对磨削加工性的影响程度的一种合理、有效的方法。     

SUBJECTIVE CERAMIC MACHINABILITY AND MATERIAL PROPERTIES

Nine different ceramic materials were subjectively evaluated, on a scale from 1 to 100, for machinability by experienced machinists. The property values of hardness, fracture toughness and elastic modulus were also obtained for the materials. Correlations were sought between the material properties and subjective machinability results. A grindability parameter and a model predicting material removal rates were included in the correlation analyses. Trends were noted between the subjective machinability evaluations and both hardness and grindability, although the grindability parameter did not correlate with either hardness or the material removal rate model.     

Evaluation of the Machinability of Nickel-Base,Inconel 718, Alloy with Nano-Ceramic Cutting Tools

The machinability of difficult-to-cut aerospace alloys can be enhanced by the rapid development of cutting tool materials that can withstand machining at high-speed conditions. The performance of nano-grain size ceramic tool materials were evaluated when machining nickel base, Inconel 718, in terms of tool life, tool failure modes and wear mechanisms as well as component forces generated under different roughing conditions. Comparison tests were carried out with commercially available ceramic tool materials of micron-grain composition.

The test results show that the micron grain size commercially available tool materials generally gave the longest tool life. The dominant failure mode is nose wear, while some of the nano-ceramic tools were rejected mainly due to chipping at the cutting edge. This suggests that physical properties and mechanical stability of the cutting edge of the ceramic tools influence their overall performance. It is also evident that chemical compositions of the tool materials played a significant role in their failure. The alumina base ceramics are more susceptible to premature fracture than the silicon nitride base ceramics with higher fracture toughness.     

陶瓷材料微波辅助加工技术的研究

介绍了一种新型的陶瓷材料辅助加工方法。该方法利用微波能,使材料在较高温度下达到塑性化,从而获得较好加工性。对陶瓷介质材料的微波作用机理以及陶瓷塑性理论进行了探讨,并给出了材料塑性化的经验温度值。在理论分析基础上,建立了微波辅助加工的数值分析模型,对微波加工中的温度分布进行了计算,并对试验结果做了直观、有意义的分析与讨论。最后介绍了自行研制的微波加工试验样机。     

陶瓷磨削材料去除机理的研究进展

磨削是目前工程陶瓷的主要加工方法，为了开发新的高效、低成本、低损伤加工陶瓷的方法，需要更深入地揭示其加工机理。介绍了陶瓷磨削的材料去除机理方面的研究进展，就其进行了一定的讨论，并得出相关的结论。     

Study on the grinding behavior of laser-structured grinding in silicon nitride ceramic

Silicon nitride ceramics are extremely difficult and time-consuming to be machined with conventional methods, such as turning and grinding. Laser-assisted machining has been a field of extensive research during the past decade, as it is a promising solution to enhance the machinability of many difficult-to-cut materials, including silicon nitride ceramics. To enhance the processing precision of silicon nitride ceramic grinding, in this work, a method of laser structuring the surface of silicon nitride is proposed. The laser process allows to precisely control the dimensions of the generated features. Therefore, different patterns with equal silicon nitride surface area are produced in order to study the influence of the pattern geometry on the grinding behavior of the silicon nitride. Grinding performance of the structured silicon nitride is tested. The influences of grinding parameters, such as wheel speed and feed rate, are analyzed for their effects on the grinding force, surface roughness. It is found that the procedure of laser-structured silicon nitride has a strong influence on the grinding results. The grooves obtained by laser-structured silicon nitride are favorable for the flow of coolant, and the cracks generated inside the grooves weak the material locally. The laser-structured silicon nitride generally allows for a reduction of grinding forces by up to 63%, and it can effectively reduce the wear of the tool.