磨料流加工中应用的高分子聚合物的热特性和流变性外文文献翻译、中英文翻译

1、附录外文资料In recent years, Fletcher et al. have studied the thermal properties and rheological properties of polymer used in abrasive flow processing, and believe that the rheological properties of media play an important role in the success or failure of abrasive flow processing. D avies and F letcher

2、studied the rheological properties of several kinds of ingredients and its corresponding processing parameters, the relationship between the results showed that the viscosity and the abrasive ratio will affect the temperature and medium pressure drop through artifacts, in the process of abrasive flo

3、w machining temperature is an important factors influencing medium viscosity.Afm is not yet widely used one of the important reasons is still a lack of understanding of the complexity of abrasive flow machining process theory and the theory support for the current process only by engineering technic

4、al personnel subjectively artificially controlled, which is not suitable for mass production. For this, using strict experiment technology such as Petri, consider all of the key parameters, put forward the process of abrasive flow machining a predictable process modeling system, the neural network,

5、the system is dedicated to all kinds of products and a variety of materials of abrasive flow machining process modeling. L am and Sm ith based on BP neural network or serial correlation neural networks, aiming at a kind of special products, automobile engine intake pipe, considering a lot of process

6、 parameters, afm modeling method is proposed, which can meet the requirements of strict technical specifications of precise control, its fundamental purpose is: one is to improve the car engine performance, reduce the fuel consumption. Second, the presetting control of abrasive flow processing is re

7、alized by obtaining the non-linear relationship between the abrasive flow processing medium and the technical specifications of the engine pipeline. Because of the inherent randomness of abrasive in the medium and the diversity of variables, the theoretical and experimental study of abrasive flow pr

8、ocessing technology has met with great obstacles. At the same time, due to the lack of understanding of the properties of abrasive media and the complexity and randomness of material removal, the modeling of abrasive flow processing technology is very complex. R ajendra K1Jain k1 Jain and V 1 a sure

9、 afm consumed per unit volume material removal in the process of energy - energy than and tangential force model, it considers the abrasive flow machining process parameters (such as particle size, particle size, hardness, extrusion of reciprocating extrusion, workpiece material and cycle number and

10、 the number of active abrasive), analyzes the artifacts and abrasive medium in the abrasive flow processing of heat conduction, workpiece temperature and afm is discussed the relationship between the process parameters, and the theoretical analysis and calculation results with the experimental resul

11、ts are compared. V 1 k1 Jain and S1G1 A dsu l experimental research on the abrasive flow machining process parameters (such as the extrusion of abrasive medium reciprocating stroke frequency, concentration of abrasive, abrasive particle size and velocity of medium) on the material removal and surfac

12、e roughness, the influence of the impact of order from large to small is: the concentration of abrasive, abrasive particle size, squeeze the reciprocating stroke frequency and velocity of medium. The experimental results of two different materials, copper and aluminum, were compared.Although abrasiv

13、e flow machining technology has a history of more than 50 years of research and application at home and abroad and some research workers since the 1970 s have been constantly engaged in the research of the technology, research and application of the technology basically still in the stage of experim

14、ent research, or still in the early stages of research and application, because of its machining process can only be controlled by engineering and technical personnel subjectively, so at present mainly is suitable for single piece production, it is difficult to promote applied in mass production. Th

15、is is mainly because there is no theoretical support for the comprehensive and complex characteristics of abrasive flow processing. The clamping device used in abrasive flow machining is a key factor to determine the effect of abrasive flow machining and even the success of abrasive flow machining.

16、Such as fixture on the import and export of abrasive flow design of location, size, direction, number, the abrasive flow in the workpiece cavity or clamp the pressure inside the cavity and the velocity distribution has an important influence, which affects the processing quality and efficiency. Some

17、 design issues that are almost entirely dependent on the designer personal practical experience, the structure design is reasonable and even if we achieve optimal design, it is not at the design stage to make reliable analysis and evaluation, and only through the actual processing, according to the

18、result of processing feasibility evaluation on its structural design. Most of actual design especially complex design is very difficult to guarantee the success rate of the primary design, often after a lot of experiments and modify repeatedly, which not only seriously affect the processing and shor

19、ten production cycle, and in the case of structural design modification cant be easy to cause the fixture or mold scrap, which caused great waste and increase the production cost, delay in the market competition of aircraft, from the perspective of modern market competition, also is to restrict the

20、enterprise agility to respond to market demand, that is, from hard technology limits the concept of advanced manufacturing technology in the implementation of an enterprise.Actually in need of surface polishing using abrasive flow machining workpiece surface shape and size of each different, and the

21、 difference is very big, how to according to its material, shape and size and surface quality of the initial state to reasonably choose the type of abrasive in the abrasive flow, particle size and its reasonable formula of binder, lubricants, etc and the reasonable pressure, velocity of the afm, rec

22、iprocating stroke times etc. It is not give a reasonable answer from theory, mainly depends on the experience and experiment. These problems is the abrasive flow processing technology has to used in mass production and application of the main difficulties and technical barriers, to believe that thes

23、e problems such as study can well be solved, will greatly promote the practical application of abrasive flow machining technology, resulting in a huge economic and social benefits.中文译文近年来, Fletcher 等研究了磨料流加工中应用的高分子聚合物的热特性和流变性, 认为介质的流变性对磨料流加工的成败具有重要的作用。D avies 和F letcher研究了几种配料的流变性与其相应的加工参数之间的关系, 结果表

24、明黏度和磨料的比例都会影响温度和介质通过工件时的压力下降, 在磨料流加工过程中温度是影响介质黏度的一个重要因素。磨料流加工至今尚未广泛应用的一个重要原因就是依然缺乏对磨料流加工工艺复杂性的理论认识与理论支持, 目前这一工艺只能由工程技术人员主观地人为地进行控制, 而不适于大批量生产。为此, Petri 等利用严格的实验技术, 考虑了所有的关键参数,对磨料流加工过程提出了一种可预测的过程建模系统,即神经网络,该系统致力于各种产品和各种材料的磨料流加工过程建模。L am 和Sm ith基于BP 神经网络或串联相关神经网络, 针对一种特殊产品 汽车发动机进气管道, 考虑了很多工艺参数,提出了磨料流加

25、工建模方法, 它能够满足严格技术规范的精确控制要求，其根本的目的在于: 一是改善美国汽车发动机的性能, 减少耗油量; 二是通过获取磨料流加工介质与发动机管道的技术规范之间的非线性关系, 实现磨料流加工过程的预调控制。由于磨料在介质中分布的内在随机性和变量的多样性, 磨料流加工工艺的理论和实验研究遇到了很大的阻碍。同时由于人们缺乏对磨料介质性能以及材料去除的复杂性和随机性的认识了解, 磨料流加工工艺的建模也是很复杂的。R ajendra K1Jain 和V 1K1 Jain提出了一种确定磨料流加工过程中每单位体积材料去除所消耗的能量 比能和切向力的模型, 它考虑了磨料流加工工艺参数(如磨粒大小 粒度、挤压力、工件材料硬度、挤压的往复周期数和主动磨粒的数目) , 分析了磨料流加工中工件和磨料介质的热传导,探讨了工件温度与磨料流加工工艺参数之间的关系,并将理论分析计算结果与实验结果进行了比较。V 1K1 Jain 和S1G1 A dsu l 实验研究了磨料流加工工艺参数 (如磨料介质的挤压往复行程次数、磨料浓度、磨料粒度、介质流速) 对材料去除和表面粗糙度的影响, 其影响从大到小的顺序为: 磨料浓度、磨料粒度、挤压往复行程次数和介质流速。并对两种不同材料铜和铝进行了实验研究比较。尽管磨料流加工技术已有 5