Recently, technologies for medical inspection have been increasing rapidly. In biomedical industry, a demand of Micro Total Analysis System (μ-TAS) has been growing which used in automatically inspection for chemical analysis. The μ-TAS have micro passageway which is constructed by many fine micro holes. Final polishing by skilled workers are carried out after drilling to obtain smooth surface of holes. Because new manufacturing technique is required instead of skilled workers, it increases productivity and cost performance of the μ-TAS. Drilling technique with low temperature environment around cutting edge is required to prevent heat crack or adhesion on holes surface, because acrylic resin heats sensitive material. In this study, ultrasonically assisted micro drilling technique is proposed to increase productivity of μ-TAS and quality of micro holes. Ultrasonically assisted machining has effective technique to improve machinability, e.g. reduce cutting force, increase chip removability and machined surface quality. This paper describes the cutting characteristics of ultrasonically assisted micro-drilling for acrylic resin to employ the μ-TAS manufacturing to solve above problems.
High precision mold grinding technique to obtain mirror surface is required which realizes
minimization or omission of final polishing by skilled workers. In the previous reports, ultrasonically
diamond grinding experiments were carried out to confirm ultrasonically oscillation effect for die
steel face grinding. Mirror surface was obtained successfully and little abrasive worn out was found.
In the above technique, the cutting edge shape of a tool affects the ground surface resulting from
transcription of cutting edge. In other words, cutting edge truncation of grinding tool is required to be
smooth and glossy surface. This paper describes the cutting edge truncation of diamond electroplated
tools which are used in ultrasonically assisted grinding. Experiments were carried out to confirm
truncation effects on the ground surface and grinding force. It was confirmed that cutting edge
truncation is effective method to obtain mirror surface and excessive truncation causes large grinding
force and chattering.
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