Generation of Tool Paths for Machining Free-Form Pockets with Islands Using Distance Maps

Methodology of machining costs evaluation for die and mould manufacturing

“…Several works on the definition of strategies for these two categories of machining operations [15][16][17][18][19][20] were achieved mainly to elaborate processes for mould machining [21]. Indeed one can distinguish three ways of determination of the process of machining a feature (Fig.…”

Touch Probe Tip Compensation Using a Novel Transformation Algorithm for Coordinate Measurements of Curved Surfaces

“…Furthermore, non-contacting CMM has some disadvantages when it measures diffusing surfaces such as ground mirrors or surfaces with limited viewpoints due to optical occlusions [4]. Nevertheless, when using contacting CMM, to maintain its original accuracy, probe radius compensation needs to be performed [1][2][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. This is because the CMM can only read the coordinates of the center of the probe tip called indicated measured points, not those of the actual contact point [2,[16][17].…”

“…In this case, users can determine the coordinates of the measurement point by simply considering the radius of the probe tip, since the contact point is a tangent of the surface. There are a lot of correction methods based on the CAD model [13][14][15].…”

Polygon subdivision for pocket machining process planning

“…In pocket machining using distance maps [ 4], the author constructed the discrete distance map by determining the closest curve segment and minimum distance for each point between the inside boundary and the offset of the boundary and then applied the z-buffer method [5]. In the z-buffer method, a right cone is constructed and moved along the boundary with different color assignment for each curve.…”

“…Thus to achieve the objective of reducing the total machining time of a workpiece, it becomes necessary to reduce the machining time of these pockets. There has been a lot ofresearch [ 1,2,3,4,5,6,7] on pocket milling. Various techniques have been developed varying from simple offset generation to more sophisticated approaches using voronoi diagrams.…”