Research and development of an Asian-oriented table system based on "one-way assemble" concept

根据亚洲国家制造业的技术水平和文化，发展“面向亚洲的机床”已变得非常重要。我们在这项研究中提出了一个概念，以解决装配的简易性问题，即“单向装配”。具体来说，我们开发了一个基于该概念的转台系统原型，并对其运动精度进行了评估。其次，提出了以装配简易性为模糊因素的定量评价方法，并将该方法应用于所开发的工作台系统的装配工艺中。(I)研究了面向亚洲的机床的规格要求。根据研究，开发了由齿条小齿轮传动和直线滚子导轨组成的转台系统作为单向装配系统的原型。(Ii)通过对装配和拆卸过程的详细研究，证明了单向装配是可行的。(Iii)当经过多次装卸过程后测量了转台系统的运动精度时，分析了装配和拆卸过程对俯仰的影响较小，对运动的偏航影响较大。(4)通过对操作者RRV变化的分析和RRI的小波分析，提出了装配简易性的评价方法。(5)将该评价方法应用于所开发的转台系统的实际装配过程中，单手操纵其他部件的装配，在水平方向上拧紧和在狭窄的空间内装配是困难的。(Vi)我们得出结论，在机床部件设计中应考虑“单操作装配”和“单向装配”，齿条-小齿轮传动和直线滚子导轨的组合可以满足这两个概念。

It has become very important to develop "Asian-oriented machine tools" in accordance with the skill level and culture of manufacturing in Asian countries A concept we have proposed in this research to make a solution to ease of assembly is "one-way assembly." In concrete, we have developed a prototype of a table system based on the concept and evaluated the motion accuracy. Second, we have also proposed a quantitative evaluation method for ease of assembly as an ambiguous factor and applied the method to the assembly processes of the table system developed.(i)The specifications required for the Asian-oriented machine tools have been investigated. According to the investigations, a table system composed of a rack-pinion drive and a linear roller guide way has been developed as a prototype of one-way assembly system.(ii)As a result of investigating the assembly and disassembly processes in detail, one-way assembly has been proven to be available.(iii)When the motion accuracy of the table system has been measured after several assembly and disassembly processes, it has been analyzed that assembly and disassembly processes have small influences on pitching and large influences on yawing of the motion.(iv)An evaluation method of ease of assembly has been proposed using the analysis of the RRV change and the wavelet analysis of RRI obtained from the operator.(v)Applying the evaluation method to the actual assembly processes of the developed table system, an assembly with handling other parts by one hand, screwing in horizontal direction and assembly within a narrow space have been found difficult.(vi)We have concluded that "single-operation assembly" as well as "one-way assembly" should be taken into consideration in machine tool component design and that the combination of rack-pinion drive and linear roller guide way could satisfy both of the concepts.