Tool Design for Burr Removal in Drilling Operations

نویسنده

  • P. Stringer
چکیده

One of the most significant problems encountered in machining, particularly in drilling, is that of burr formation. Burrs usually comprise of work piece material which has been plastically deformed during the machining process and projects beyond the desired edge of the work piece. The adverse effects of burrs depend on the component application but may include; stress concentration and related fatigue failure and increased wear on components and tools involved in the manufacture of the part. The minimisation or eradication of burrs produced during the drilling process is therefore of the utmost importance. Currently there is a focus on reducing burr formation through optimisation of process control parameters and drill geometry. However previous studies have shown that, while it is possible to reduce the size of the burr, it is not possible to eliminate it entirely. Although numerous companies have developed methods for removing drilling burrs, these invariably involve extra process steps and increase cycle times and costs. A combined drilling and deburring tool would provide the optimal solution, removing the burr while not significantly increasing drilling time. This paper reviews the current state of art in the field of burr reduction and removal in drilling operations, with a focus on tool design.

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تاریخ انتشار 2007