Burrs formed by milling are three-dimensional in nature. Therefore the three-dimensional effects on milling burr formation in 304L stainless steel were considered. An important aspect of the three-dimensional effects is the exit order of the tool edges because the burr remains near the final exit position of the tool along the workpiece edge. The geometric parameters of the workpiece and tools were varied to change exit order in the workpiece around the cutting edge. Moreover in this paper, classification of milling burrs based on burr location, shape and mechanism is also proposed to avoid confusion. The milling burrs were classified according to three locations, five shapes and four burr formation mechanisms based on fractography. The exit burr on the exit surface and the side burr on transition surface of workpiece were mainly analyzed. The effect of in-plane exit angle and radial rake angle on burr formation were shown and the burr formation mechanism for each burr was also discussed.

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This paper discusses the design and development of a software tool for marker making operations io textile manufacturing using a top-dom design paradigm. The software requirements have been analyzed and specified in order to address practical requirements by the users. The software is implemented in a CAD sofivare environment. Its aim is to find an appropriate stencil layout on fabric surface such that the stencils do not overlap one another while trim loss is minimized The software can be used to find the stencil layout on plain fabric, fabric with horizontal or vertical stripes and fabric with checkered patterns. A heuristic search strategy is developed to find such a layout. In order to evaluate the program's performance, case studies with actual fahric and stencils from a garment factory are used. The layouts generated by the program are then compared with those produced by a human expert. The results indicate that the developed program cannot outperform the human expert in the case of marker making on plain fabric. However, in the case of marker making on the fabric with stripes or checkered patterns the program can provide better results in terms of the required length of fabric and the trim loss percentage. Suggestions for further improvement on the functionality and efftciency of the program are also given.