What are the requirements for the selection of CNC precision machining tools?(1)

1. General rules of CNC precision machining toolpath

　　 Thickness: Under the maximum load of the machine tool, in most cases, the largest possible knife should be selected, the largest possible amount of feed, and the fastest possible feed. In the case of the same knife, the feed is inversely proportional to the amount of feed. In general, the load of the machine tool is not a problem. The principle of tool selection is mainly based on whether the two-dimensional angle and three-dimensional arc of the product are too small. After selecting the tool, the tool length is determined. The principle is that the tool length is greater than the processing depth. For large workpieces, it is necessary to consider whether the chuck has an interference light knife: The purpose of the light knife is to meet the processing requirements of the workpiece surface finish and reserve an appropriate margin. .

　　 2. Vise clamping: The clamping height should not be less than 10 mm. The clamping height and processing height must be specified when processing the workpiece. The processing height should be about 5 mm higher than the vise plane, the purpose is to ensure the firmness, while not hurting the vise. This kind of clamping is a general clamping, and the height of the clamping is also related to the size of the workpiece. The larger the workpiece, the higher the clamping height. 3. Clamping: the clamping plate is coded on the work table, and the workpiece is screwed. Locked on the clamping plate, this kind of clamping is suitable for workpieces with insufficient clamping height and large processing force. Generally, large and medium-sized workpieces have better results. 4. Iron clamp: When the workpiece is large, the clamping height is not enough, but not When quasi-locking the wire at the bottom, use code iron to clamp.

CNC precision machining

 This kind of clamping needs to be clamped twice, first code the four corners, process the other parts, and then code the four sides and process the four corners. During the second clamping, do not let the workpiece loose, first loosen and then loosen. You can also code the two sides first, and process the other two. 5. Clamping of the tool: The diameter is more than 10mm, the clamping length is not less than 30mm, and the diameter is less than 10mm, and the clamping length is not less than 20mm. The clamping of the tool should be firm, and prevent the collision of the knife and the direct insertion of the workpiece. 3. The classification and application of the tool 1. According to the material:

　　 ● White steel knife: easy to wear, used for roughening copper and small steel materials

　　● Tungsten steel knife: used for angle cleaning (especially steel) and smooth knife.

　　 ● Alloy knife: similar to tungsten steel knife.

　　 ● Purple knife, used for high-speed cutting, not easy to wear