Factors to Consider When Choosing a CNC Machining Tool

(1) Select the tool according to the material of the part. Such as turning or milling high-strength steel, titanium, stainless steel parts, it is recommended to choose indexable carbide tools with better wear resistance.

(2) Select the tool according to the precision CNC machining stage. That is to say, the rough machining stage is mainly to remove the allowance, and a tool with good rigidity and low precision should be selected. In the semi-finishing stage, in order to ensure the accuracy and quality of the parts, a tool with high durability and relatively high precision should be selected. The lowest tool precision and the highest precision tool finishing stage is used.

If the same tool is selected for roughing and finishing, it is recommended to choose the roughing tool after finishing, because the wear of the finishing tool blade is mostly light wear, and the wear of the coating trimmer will affect the finishing. Machining quality, but has little effect on finishing quality. roughing.

(3) Select tools and geometric parameters according to the characteristics of the processing area. Small tools with large diameter aspect ratio values u200bu200bshould be used in the part structure permit; when cutting thin-walled parts, the thin-walled parts should have sufficient end angle through the center of the blade to reduce the cutting tool and cutting force of the part. When machining parts of softer materials such as aluminum and copper, a milling cutter with a slightly larger rake angle should be used, and the number of teeth should not exceed four.


When selecting a tool, the size of the tool should be adapted to the size of the workpiece surface. In production, around the contour processing of plane parts, end mills are often used; for plane milling, carbide insert milling cutters are required; when machining bosses and high-speed steel milling cutter grooves; when machining rough surfaces or rough holes, hard alloy cutters can be selected. Solid alloy inserts or corn milling inserts; for some three-dimensional surfaces and bevel machining of changing contours, ball mills, annular milling cutters, conical milling cutters and disc milling cutters are often used.

In the free-form surface, since the ball end mill is zero, the line spacing to ensure precision cutting is generally small, so the ball end mill is suitable for surface finishing. This kind of end mill is far superior to the ball cutter in both surface machining and machining efficiency. Therefore, under the premise of ensuring the machining of parts, but under the premise of rough machining and semi-finishing surface cutting, try to choose the side milling cutter. In addition, the durability and accuracy of the tool has a lot to do with the price of the tool, and we must note that in most cases, although the choice of a good tool increases the cost of the tool, the resulting machining quality and efficiency can be greatly improved. Reduce costs throughout the process.



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