This article will introduce the method of machining the intersection of curved surface with numerical control machine tool.
Three axis CNC machining surface intersection
Because the three-axis CNC machining tool axis is fixed and not affected by other factors, generally only spherical tools can be used. In this way, the final state of the intersection of the two surfaces can only be to leave the minimum allowable tool fillet radius at the intersection, and it is impossible to process a strict intersection.
The spherical cutter is used to process the intersection of curved surface in three-axis CNC. The calculation method of constructing the intersection of equidistant surfaces of the machined surface can be used to generate the intersection machining tool path. The processing process is mainly as follows:
1. According to the machining process requirements of intersecting surfaces and the shape of intersecting surfaces, the spherical cutter with the largest semi precision of the tool is selected.
2. Construct equidistant surfaces of two machined surfaces, and the distance is equal to the radius of the tool.
3. Find the intersection of two equidistant surfaces.
4. Based on the intersection point column, the parameter screening method is used to generate the intersection machining tool path, or the intersection point column can be directly used as the intersection machining tool path.
5. According to the inspection surface at both ends of the intersection and the tool movement, the cutting tool path of the intersection processing is cut.
2、 Five axis CNC machining process of surface intersection
For 5-axis CNC machining, because the cutter axis can be controlled, not only spherical cutter can be used for surface intersection root cleaning, but also spherical cutter or end milling cutter can be used according to the shape of rubber surface and constraint surface.
1. Five axis CNC machining process of spherical cutter with curved surface intersection
The intersection line of spherical cutter five coordinate machining surface should be discussed in two cases. One is similar to the intersection line of spherical cutter three coordinate machining surface, that is, the cutter center moves along the intersection line of the equidistant surface of the machining surface without being affected by other factors; In another case, the intersecting line processing is processed simultaneously in the processing of the part surface. The cutter axis is mainly controlled by the processing of the part surface, and the cutter center is constrained on the equidistance of the guide surface, and is affected by the position and direction of the cutter axis.
2. Five axis CNC machining process of curved surface intersection ring cutter
In five axis CNC machining, the intersection line of curved surface is processed by ring cutter, the cutting contact between each control surface and the cutter is limited on the circular torus of the blade, and the common normal line of each control surface and the blade surface passes through the center line of the blade ring, not through the center point of the blade.