How to deal with and guard against vibration cutter in CNC milling machine?

How to deal with and guard against vibration cutter in CNC milling machine?

1. Use sharp blades to reduce cutting force of CNC milling machine. Machine clamping blades are divided into coated and uncoated blades. Uncoated blades are usually sharper than coated blades, because if the blade is to be coated, it is necessary to conduct the passivation treatment (ER treatment) on the blade edge, because the sharp blade will affect the adhesive strength of the coating on the blade part.

2. When the cutting depth is constant, no doubt the cutting force can be reduced by using a small radius of the blade tip arc. Especially the radial cutting force, which is the main cause of vibration of slender rod or workpiece. Whether it's chipping or milling. At the same cutting depth, the arc radius of the tip of the tool is larger. The greater the tendency of the slender blade to vibrate.

3. When cutting depth is optional, avoid cutting depth equal to the radius of arc of blade tip.

4. for the slender rod sharp knife key cut, or cylindrical turning of slender shaft, using the 90 ° Angle of cutting tool for vibration-free Lord. Slender cylindrical turning turning slender shaft, or key knife of the hole, always 90 °, the Angle of the cutting tool of radial cutting force is minimal. At the same time, the axial force of the blade is the greatest.

5. For the milling cutter of slender rod, circular blade milling cutter is most favorable for vibration elimination. Milling cutter, in contrast to the mixing blade, the closer the main Angle 90 °, the bigger the radial cutting force a few tool rod vibration. So in the face of the deep groove cavity mould CNC milling machine milling, usually choose 45 ° Angle milling cutter, if the cutting depth is less than Imm. Usually USES the round blade milling cutter or the ball knife.

6. When the CNC milling machine USES the slender end milling cutter to mill the deep cavity, the insert and milling method is often adopted. Insert milling is when the cutter is a bit like an axial feed, when the depth of the cavity is milling. Usually the length of the rod is more than 3 times the diameter of the rod. We recommend the use of axial feed insert milling. However, the end mill blade blade has a certain width of radial cutting edge. The tool supplier has technical data to prove the maximum width of the cutter at the time of cutting and milling.

7. The reason for vibration in the milling of thin-walled workpieces is entirely due to workpieces, which are called box or bowl parts. Since the vibration comes from the workpiece itself, the main method to deal with the milling of this kind of parts is to improve the clamping of the workpiece.

8. When boring the inner hole, the smaller the blade Angle is, the better. In this way, the main offset Angle of the auxiliary is large, and the contact area of vibration between the auxiliary blade and the processed surface is small, so the vibration is difficult to change into vibration.

9. If the face milling cutter adopts the gear sparing and non-equidistant milling cutter, the vibration of milling can be reduced. The "tooth" here refers to the blade. Face milling cutter of the same diameter (for example, 100mm). If all three of their cutting elements are equal, then five blades must produce 50% less milling force than 10 blades.

10. Use blades with front and back angles. And with a brisk chip breaker. Such a blade has the smallest cutting Angle in filing or milling, and the cutting is certainly brisk.

11. Adjust cutting parameters. Adjusting the cutting parameters can only be effective if the cutting vibration is not severe. The general adjustment method is as follows: reduce the rotation speed of the cutter or workpiece, reduce the cutting depth, and increase the amount of tooth removal per rotation or milling cutter. If vibration is generated during the process of internal thread cutting, the feeding step of screw cutting can be reduced by one or two. Want to learn UG programming can help you.

12. Reasonably arrange the process path of cutting. It is very important to arrange the process path of the cutter. Milling is divided into forward milling and reverse milling. The traditional milling theory describes that using reverse milling is beneficial to reduce the vibration of milling. Today's milling equipment is mostly equipped with ball bearings or roller lead screw. So the anti-milling vibration is of little significance. As long as the direction of milling force is consistent with the clamping direction of workpiece, the vibration of bending plate part can be eliminated.