科研之友
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摘要
In a precision sheet metal cutting process, the major problems encountered are the crack and burr formations. Further operations are required to eliminate these formations, which increase the production cost and time. In the reciprocating shaving process, the workpiece is half-shaved and then shaved again in the opposite direction. This process could be fabricated to produce a smooth-cut surface without any crack and burr formations. However, the shaving direction effects were not investigated. In the present study, the finite element method was used and laboratory experiments were performed to clarify the shaving direction effects. The shaving direction effects could be theoretically clarified on the basis of stress and strain distributions. The bending feature was a result of the half-shaving in the reverse shearing direction. Thus, tensile stress on the half-shaved workpiece increased and crack formations occurred. In addition, the roughness and hardness of the surface half-shaved were higher in comparison to the sheared surface. However, the roughness and hardness of the half-shaved surface were rarely affected by the half-shaving direction. The bending feature was generated to some extent on the shaving operation. However, it was easily generated in the case of shaving in the parallel shearing direction. The finite element simulation results were validated by the laboratory experiments. It was found that the results corresponded suitably with the experimental results.
- 出版日期2010-9
