To ensure the surface roughness requirements of the geographic contour surface after machining, the final internal cavity contour should be arranged for continuous machining in the final machining.

The inner groove is a flat bottom groove surrounded by a closed curve. All end mill cutters are machined with flat bottom end mill cutters. The radius of the roundness of the cutter must meet the gutter extraction requirements.

Shows three feed paths for inner grooving. Is the inner groove processed by the line cut method and the ring cut method, respectively. What the two supply pathways have in common is that they can cut the entire area of ​​the lumen, leave no blind spots, do not damage contours, and minimize repeated supply overlap.

The difference is that the feed path of the row cutting method is shorter than that of the loop cutting method, but the row cutting method leaves a residual area between the start and end points of each supply and does not provide the required surface roughness. be. The surface roughness obtained by the ring-cut method is superior to that of the line-cut method, but the ring-cut method requires the contour lines to be extended outward one by one, which makes the calculation of tool points a little complicated.

Use the feed route shown in. In other words, if you cut the center part by line cutting first and then cut the contour surface by ring cutting, you will get the total feed path. Shorter and better surface roughness.