• 제목/요약/키워드: Clay Machining

검색결과 2건 처리시간 0.016초

Clay가공에 있어서 Burr 생성기구에 관한 연구 (A Study on the Bburr Formation Mechanism in Clay Machining)

  • 양균의;고성림
    • 한국정밀공학회지
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    • 제7권4호
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    • pp.73-84
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    • 1990
  • A burr has been defined as an undesirable projection of material formed as the result of plastic flow from a cutting or shearing operation. It is Unavoidable in all kinds of machining operation. This paper describe the burr formation mechanism which is based on the behavior of workpiece material during orthogonal machining of the clay on the milling machine. Specially in this report the rollover burr is dealt as a specific case of the chip formation in the final stage of cutting. The negative shear angle is introduced as an important features of burr formation. It is found that the burr formation process is divided into three stage-initiation, development of negative shearing, and formation of the burr with appropriate assumptions. Using above the burr formation mechanism, the size of burr can be estimated by cutting conditions.

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폴리우레탄폼 절삭에서 절삭력을 고려한 공구 오프셋이 가공정도에 미치는 영향에 관한 연구 (A Study of an Effect of Tool Offset on Cutting Precision Considering Cutting Force in Polyurethane Foam Cutting)

  • 민세홍;김희송
    • 대한기계학회논문집A
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    • 제24권12호
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    • pp.3018-3025
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    • 2000
  • It is possible to shorten developing process by making model using polyurethane foam in the area of automobile development process, etc. However, this skill is too difficult to be of practical use because machining is not easy due to characteristic of polyurethane foam. Domestic and foreign automobile company use clay, polyurethane foam. etc,, those are easy to handle and to make model after completing design sketch. But these materials is difficult to the machined and be worked by humans hand, There are so many difficult problem for machining by making model using polyurethane foam since cutting of elastic body like polyurethan foam has never been studied. Therefore, in this study, it is investigated to measured cutting force that is generated in case of polyurethane foam machining, and to make systematize tool compensation of polyurethane foam cutting work on automobile model by modification of tool offset method on existing steel.