To eliminate cutting vibration, we should find a way to think from the tool. First of all, the principle of minimizing the cutting force should be followed to help the sharpness of the cutting edge of the tool to reduce the cutting force, and the cutting edge should be sharp regardless of whether the knife is coated or not. In addition, suitable methods are used for different types of cutting operations. For example, a 90-degree leading angle tool should be used for a slender shank to cut slender shaft parts; a sparse-tooth unequal-distance milling cutter should be used for the face milling cutter to reduce milling vibration; the smaller the blade edge angle, the smaller the inner hole boring. it is good. After that, the static rigidity of the reinforced tool should be considered, and a solid carbide or heavy metal shank should be used.

How to reduce cutting vibration in machining center

• If the face milling cutter adopts the sparse tooth unequal distance milling cutter, the milling vibration can be reduced. Here "tooth" refers to the blade. Twelve methods of reducing the cutting vibration of CNC milling machines with the same diameter of face milling cutter (such as 100mm) The article twelve methods to reduce the cutting vibration of CNC milling machines. If their cutting triads are equal, then a 5-insert turret must produce 50% less milling force than a 10-insert turret.

• Use a sharp blade to reduce the cutting force of the CNC milling machine. Machine-clamped blades are divided into coated and non-coated blades. Non-coated blades are usually sharper than coated blades, because if the blade is to be coated, the edge must be passivated (ER treatment). Because sharp The edge will affect the bond strength of the coating at the edge.

• When the depth of cut is constant, the use of a small tool nose radius can undoubtedly reduce the cutting force, especially the radial cutting force, which is the main cause of the vibration of the slender rod type tool or workpiece. Either bumping or milling. At the same depth of cut, the larger the radius of the tool nose arc, the greater the tendency of the slender shank to vibrate.

• When the depth of cut is selectable, avoid that the depth of cut is equal to the radius of the tool nose arc.

• Use inserts with positive rake angle and large relief angle. And with a light chipbreaker. Such an insert has the smallest cutting wedge angle in filing or milling, and the cutting is of course brisk.

• Adjust cutting parameters. Adjusting the cutting parameters may only be effective when the cutting vibration is not severe. The general adjustment method is as follows: reduce the rotation speed of the tool or workpiece, reduce the depth of cut and increase the amount of cutting per revolution of the tool or milling cutter. If vibration occurs during the turning of internal threads, the feed steps for thread turning can be reduced by 1 to 2 cuts. Twelve methods to reduce the cutting vibration of CNC milling machines.

• Reasonable arrangement of the process path of the cutting tool Rational arrangement of the technological path of the cutting tool is very important for milling. Milling is divided into down milling and up milling. As described in the traditional milling theory, the use of up milling is beneficial to reduce the milling vibration, which actually means that it is beneficial to suppress the vibration generated by the clearance of the lead screw. Today's milling machines are mostly fitted with ball or roller screws. Therefore, the up-milling vibration elimination is of little significance. Whether it is down milling or up milling. As long as the direction of the milling force is consistent with the clamping direction of the workpiece, it is beneficial to eliminate the vibration of bent plate parts.

Conclusion

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