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The procedure of structural design on miniaturized machine tool(mMT) is proposed and structural optimization by applying robustness evaluation method is presented in this paper. The design procedure of a 3-axis miniaturized machine tool is discussed as the case study. The most suitable structure is selected using robustness evaluation method, which is Taguchi method, due to volumetric error function. This paper also shows general procedure of accuracy estimation for stage system design by using Homogenous Transform Matrix(HIM)
The purpose of the present. paper are not to develope machine tools of new concepts and advanced mechanisms but to introduce and apply new methods and concepts in the design procedure by using and changing the previously existing technologies. In this paper 3D modeller was proposed for designing machine tools and the design automation software(DesignMecha 2000) was used. 3D modeller enabled more fast design and the better manufacturability checking than 2D one so that design error was dramatically reduced. As designer may easily understand the real shape of a part and assembly object, it's easy to draw the drawings not only in a conceptual design but also in a detailed design. Also, design automation software enabled designer to consider the real important design parameters by reducing time to spend in estimating and calculating the strength of the model by the computer aided automatic calculation instead of a tedious and complex: calculation by manual method and help him to easily make the decision for selecting the stocks and design the structure of part or unit of machine tools.
This paper proposes the manufacturing method of master pattern which is applied to the vacuum casting. We typically use the Rapid Prototype to manufacture the master pattern. However, during post-process, error of the master pattern made by Rapid Prototype is more. Especially, in case of Aspheric Lens, the shape error occurs because of the process of the alcohol cleaning and post-indurate. In order to reduce this error, we propose the new manufacturing method of mater pattern by intensifying the level of detail pattern.
We have developed a high-resolution alignment microcontact printing device based on transferring a pattern from a PDMS stamp to a metal coated substrate by using self-assembled monolayers. The PDMS stamp was mounted on stamp chuck with rigid backplane. The metal coated substrate was brought at a gap of about 12㎜ from the PDMS stamp. Stamp chuck was controlled step of 100㎚ by a PZT actuator and LVDT sensor. When stamp chuck was fed, working gap has smaller and part of PDMS stamp makes contact with substrate at a low force close to the 0.1N, effecting the printing. As a result of manufacturing microcontact printing device, the defect-free pattern of sub-micron size could be fabricated from PDMS stamp. Also, microcontact printing device overcomes all the disadvantages of conventional printing techniques and prevents transformation of the submicronfeatures in the polymer stamp. And, the pattern was printed without deform by the delicate printing process, which is specially invented for microcontact printing process.
The establishment of a practical ultra-precision grinding technique using diamond wheels is one of the major key technology to improve production techniques for machine-to-difficult materials such as WC-Co alloy without additional finishing process. But the special efficient dressing technique for ultra-fine grit type grinding wheels to obtain high quality machined surface with the stabilization of the grinding ability was not developed. Recently, electrolytic in-process dressing technique is proposed to ultra-fine grit type metal bonded diamond wheels to protrude abrasives continuously from the tool surface. In this study, various grinding experiments using such advanced dressing method were carried out to obtain high quality ground surface of fine sheet metal forming die. Then, in conclusion, ultra-precision ground die part with burr -free state can be manufactured differently in conventional grinding.