Cutting path selection in CNC processing

1. Surface dredging
The key is the choice and face of the scope.
The area of tool path processing is based on the principle that the selected surface of the selected area is the terminating surface and the highest point to the lowest point where the tool can go down. The best surface is the whole body, and the boundary is only the area to be processed. The distance is less than half the diameter of the knife, because the other side has enough allowance to protect it automatically. It is best to extend the lowest line because there is a R gong at the lowest point.


The choice of knives: if the tool can not be helical or slash feed, or the area where the machining area can not enter the knife area, it will be closed for two times.


Before cutting the knife, it is necessary to open the rough area, especially the small angle, which includes two dimensional angle, three dimensional angle and the sealed area, otherwise the knife will be broken. Small partners who like machinery can focus on intuitive mechanical micro signals. The two time is rough: generally choose the range of 3D trenching, flat bottom knife, and can use planar trenching and shape tool path. In the case of no injury to other surfaces, the tool center to the selected boundary, generally not the boundary of repair, with a fast two-way angle as the situation, the spiral knife, the angle 1.5 degrees, 1, when the groove shape is bar, the spiral knife can not use the oblique line, generally open the filter, especially the surface of the rough surface, the plane can not be lower, the plane is not low, the plane can not be lower, the plane is not rough. In order to avoid the knife, the safety height can not be low.


Draw back: generally do not need to return the knife relatively, use absolute retreat knife, when there is no island, use the relative retracting knife.


2. Plane dredging
Milling a variety of plane, concave groove, when the milling part of the open plane, the need to set the boundary, the principle can be knife (greater than a knife diameter), the opening section is more than half a knife diameter, closed outside.


3. Shape
When the selected plane is suitable for the shape of the shape, the knife (plane shape) is raised with the shape of the shape. When the knife point and the knife point are one point, the knife z plane is not required to lift the knife, and the relative height is not used as much as possible; the correct direction is generally right (CIS).


4, the tool path setting of mechanical correction
The correction number is 21, instead of the computer correction, the feed is vertical feed, and the tool can not go beyond the R.


5, equal high shape
It is suitable for a closed surface. If the open face is four circles, it will seal the surface. If it is within four circles or not four circles, the range and height should be selected. For opening the rough condition, the machining distance in any plane is less than a knife diameter, if the diameter of a knife is larger than a knife, it will use a larger knife or two second high. Shape.


6. Surface streamline
With the best uniformity and dry brittleness, it is suitable for light knife to replace the contour.


7, radial knife Road
It is suitable for a large hole in the middle (Shao Yong). Note: the knife, the knife is not sharp, the knife is too long, the workpiece is too deep to walk around, the workpiece in the corner of the side of the surface should be divided into two knife Road, not the past, the edge of the knife when the best extension (with the arc line knife).