This paper presents an approach to analytically determine the most energy efficient toolpath strategy in mechanical machining. This was achieved by evaluating the electrical energy requirement of the NC codes generated for the zag, zigzag, and rectangular contour toolpath strategies. The analytical method was validated by performing pocket milling on AISI 1018 steel with the considered toolpath...

The pocketing operation is a fundamental procedure in NC machining. Typical pocketing schemes compute uniform successive offsets or parallel cuts of the outline of the pocket, resulting in a toolpath with C discontinuities. These discontinuities render the toolpath quite impractical in the context of high speed machining (HSM). This work addresses and fully resolves the need for a C continuous ...

We present a scheme to construct C1 continuous toolpath for 5-axis pocketing of high speed machining. A continuous toolpath synthesis is proposed, that forms out circular segments of maximally inscribed sizes and linear segments connecting these circular segments. Extending earlier work that employed the Medial Axis Transform to compute these maximally inscribed circles for 2D planar pockets, t...

Raytraced image of the \house on the hill" model. Plate 4 Aluminum milled version of the \house on the hill" model. Plate 1 Raytraced image of the knight model. Plate 2 Aluminum milled version of the knight model. Figure 5: Adaptive isocurves toolpath for the ^ O ooset of the \house on the hill" model. Figure 4: Parallel plane contouring is used to generate 3 axes pockets for rough cutting. (a)...

Free-form surfaces are widely used in CAD systems to describe the part surface. Today, the most advanced machining of free from surfaces is done in five-axis machining using a flat end mill cutter. However, five-axis machining requires complex algorithms for gouging avoidance, collision detection and powerful computer-aided manufacturing (CAM) systems to support various operations. An accurate ...

This chapter covers the various free-form surface flank milling strategies available, focusing in particular on those for ruled surfaces as widely used in defining turbomachine parts. All these positionings seek to reduce interference between the cutting tool and the surface to be milled so as to respect the tolerances dictated by the Design Office. The range of strategies presented goes from t...

Since some practical areas of computer science, such as computer graphics, computeraided design, robotics, and pattern recognition, give rise to geometrical problems, Voronoi diagrams have broad areas of application. Voronoi diagrams also have popular application in machining toolpath planning, using a contour-parallel strategy. When the contour-parallel strategy is applied to the machining too...

Abstract.In CNC manufacturing,there often arises the need to create GCode programs which require the calculation of discrete x-y coordinate point pairs(2D). An example of this situation is when the programmer needs to create a program to machine a helix(or thread).The required toolpath will be a set of points on a helix curve.The problem now entails calculating the number of points along this c...