微量油膜附水滴切削性能的试验研究

通过对微量油膜附水滴切削液切削、干切削和乳化液切削进行对比试验,研究了微量油膜附水滴的切削性能。结果表明:微量油膜附水滴切削液能够显著提高切削性能;与干切削和乳化液润滑切削相比,采用微量油膜附水滴切削液能够降低切削力和加工表面的粗糙度值,延长刀具的使用寿命。     

浅谈干切削加工技术的发展与应用

干切削加工技术是解决切削液带来的环境污染及提高切削加工经济效益的根本方法。论述了干切削加工的特点、实施可能性及其应用。     

低温干切削技术

在切削加工中,切削液主要起冷却、润滑、清洗排屑以及防锈作用,还能提高加工效率和加工质量。但随着经济的发展,人们环保意识的增强,切削液的负面效应正逐步被重视。从经济环保等角度看,不使用切削液的干切削加工才是理想的绿色制造工艺方法。但干切削加工时摩擦力大,切削力大,切削温度高,完全的干切削对刀具的材料、结构、几何角度等工艺条件要求极为苛刻,使它的应用范围受到了很大限制。目前对刀具的冷却仍是最常用、最有效的方法。从刀具的磨损机理上分析,切削时产生的摩擦高温是造成刀具磨损的主要原因。切削液的主要作用也是通过液体气…     

干切削加工技术的应用

干切削加工技术是解决切削液带来环境污染和提高经济效应的根本方法.笔者论述了干切削加工的特点,并给出了某些应用实例.     

普通切齿机床如何实现高速干切削

阐述了干切削加工技术是解决切削液带来的环境污染及经济效应问题的根本方法。并论述了干切削加工的特点和在普通切齿机床上实施的可能性。     

干切削加技术的发展及应用

解决切削液带来的环境及经济效益的根本方法就是干切削加工技术。本文叙述了干切削加工的特点、实施可靠性，并给出了某些应用实例。     

绿色制造中干切削的研究

干切削作为一种新型的绿色制造技术,不仅能避免切削液对环境的污染,而且能大幅度降低产品的生产成本,它已成为金属切削加工发展的趋势之一。文中分析和研究了干切削加工对刀具和机床的要求。     

绿色切削加工技术分析

21世纪的制造业实施绿色制造已势在必行，绿色切削加工技术的研究应运而生。干切削技术避免了切削液的副作用，但它对刀具提出更高的要求；切削液最少量润滑技术能够使切削工作处在最佳状态下，切削液的使用量达到最少，但绿色切削液需深入研究。笔者认为，实现绿色切削加工的关键技术是：1）开发刀具技术。包括新型刀具材料和刀具涂层技术的研究和应用，优化刀具形状及结构；2）开发绿色切削液技术，包括切削液的绿色设计与绿色使用，开发切实可行的废液处理新工艺。     

绿色切削磨削加工技术

传统的切削加工大量采用切削液浇注法降低加工区温度,切削液的大量使用给环境和操作者健康带来了很大危害,而且增加了切削液排放回收的成本。面对人类社会可持续发展的需要,实施绿色制造已势在必行。本文分析了绿色切削加工技术,如干切削技术、微量润滑、液态氮冷却、气体射流冷却在机械制造中的应用及其技术特征,结论是绿色切削加工技术将逐渐取代传统的浇注供液方法,是未来制造业的发展方向,具有很好的发展前景。     

车削45钢时微量油膜水滴切削液对切削性能的影响试验研究

简述了微量油膜水滴切削液的冷却润滑原理。在C621-1普通机床上采用干切削、乳化液和微量油膜水滴切削液3种不同的冷却润滑方式下对45碳素结构钢进行车削试验。试验结果表明,与干切削和乳化液切削相比,采用微量油膜水滴能显著提高切削性能,有效地降低了刀具磨损和加工表面粗糙度值。     

新世纪的干切削技术

干切削作为一种新型的绿色制造技术,不仅能避免切削液对环境的污染,而且能大幅度降低产品的生产成本。文章论述了干切削研究的国内外现状,在讨论切削液原有功能的基础上,对实现干切削的刀具技术,机床技术和工艺技术进行了系统的分析与研究,介绍了准干切削技术及其应用,展望了干切削技术今后的发展。     

关于绿色切削液研究开发的几点思考

本文简述了传统切削液存在的危害，提出了开发绿色切削液的必要性，并提出了研究开发绿色切削液的基本要求，基础油和添加剂的选用原则，以及一些值得重视的问题。     

THE EFFECT OF THE CUTTING FLUID ON SURFACE ROUGHNESS IN BORING OF LOW CARBON STEEL-TECHNICAL COMMUNICATION

In spite of their environmental and human health problems, the cutting fluids still have been used widely in industry due to cutting fluid application can increase cutting performance in metal cutting. In this article, the effect of the cutting fluid on surface roughness in boring of AISI 1030 low carbon steel was investigated depending on BUE and chip formations and other cutting parameters, such as cutting speed, feed rate and tool nose radius. In most of boring experiments, the wet cutting did not show more preferable results than dry cutting. However, cutting fluid application with big nose radius and small feed rate improved the surface roughness up to 80%. This progress was attributed to a favorable chip formation as much as effective cooling.     

THE EFFECT OF THE CUTTING FLUID ON SURFACE ROUGHNESS IN BORING OF LOW CARBON STEEL–TECHNICAL COMMUNICATION

In spite of their environmental and human health problems, the cutting fluids still have been used widely in industry due to cutting fluid application can increase cutting performance in metal cutting. In this article, the effect of the cutting fluid on surface roughness in boring of AISI 1030 low carbon steel was investigated depending on BUE and chip formations and other cutting parameters, such as cutting speed, feed rate and tool nose radius. In most of boring experiments, the wet cutting did not show more preferable results than dry cutting. However, cutting fluid application with big nose radius and small feed rate improved the surface roughness up to 80%. This progress was attributed to a favorable chip formation as much as effective cooling.     

高速干式飞刀铣齿切削温度仿真分析及实验研究

根据金属切削和传热学理论,采用高速干式飞刀铣齿模拟滚齿加工过程,建立了飞刀铣齿切削温度的数学模型,推导出飞刀多因素切削温度场计算公式,对高速干式飞刀铣齿的切削温度进行了仿真分析,并结合高速干式飞刀铣齿实验,采集实验数据与理论数据进行了对比分析,考察了切削温度与各主要切削参数之间的关系及变化规律,从而验证理论仿真模型的正确性,为进一步研究高速干式滚齿的切削温度和高速干式滚齿的切削机理等问题,奠定了基础。     

On-machine tool resharpening process for dry machining of aluminum alloys employing LME phenomenon

Dry machining of aluminum alloys is known to be one of the most difficult metal cutting operations. The issues involved are that without use of cutting fluids, these materials severely adhere to the tool surface and form a built-up edge due to their low melting point and high ductility, leading to deterioration of the surface integrity of the workpiece and tool failure. To overcome this problem, the present study proposes a novel strategy for removing the adhesion layer from the tool surface and recovering the cutting tool performance without detaching the cutting tool from the machine tool, namely, an on-machine tool resharpening process. To achieve efficient removal of the aluminum adhesion layer from the tool surface, the phenomenon of liquid metal embrittlement (LME), which is defined as a brittle fracture, or loss in ductility, of a ductile material in the presence of a liquid metal is employed. A series of experiments using a WC-Co cemented carbide tool and liquid gallium showed that the newly developed strategy employing LME is highly effective in removing the adhesion layer without damage to the tool substrate and has great potential for addressing the issues related to the dry machining of aluminum alloys.     

金属切削技术的发展动向

本文介绍了近几年来高速切削、干式切削和硬切削技术的现状与发展动向。     

干切削技术及其新发展

从干切削机床、刀具和工艺方法三个方面对干切削技术及其最新发展进行了全面的论述.     

Characterisation of friction properties between a laminated carbon fibres reinforced polymer and a monocrystalline diamond under dry or lubricated conditions

The machining of carbon fibre reinforced polymer (CFRP) is a hot topic for the aircraft industry. Such materials are considered as difficult to cut materials due to their heterogeneity and presence of hard fibres. In this context, a lot of finite element models have been developed in order to understand their material removal mechanisms. Among the scientific issues faced by these works, the identification of friction coefficients between CFRP and cutting tool materials remains unanswered. So, this paper aims to characterize the friction properties between composite and cutting tool materials. For instance, the paper focuses on the context of a laminated CFRP machined with a monocrystalline diamond tool under dry or under lubricated conditions. The specific tribological conditions during machining of such heterogeneous materials are discussed in the paper, especially the configuration of the tribosystem (‘opened tribosystem’) and the orientation of laminates and fibres during sliding. The great lack of friction coefficient is mainly due to the absence of relevant tribometers simulating the tribological conditions occurring in cutting. This paper presents the development of a new tribometer designed to simulate conditions corresponding to machining of CFRP materials. It provides quantitative values of friction coefficient depending on several key parameters. A range of sliding velocities and contact pressures has been tested. The influence of layers orientation and cutting fluids has also been investigated. It has been shown that friction coefficients are very low (∼0.06) in dry regime. Friction coefficient is not sensitive to contact pressure nor to sliding velocity. Additionally this works has revealed that a cutting fluid leads to a significant decrease in friction coefficients (∼0.02), which corresponds to a friction less situation.