Because there will be some tiny gaps between the milling cutter and the tool holder, the tool may vibrate during the machining process. Vibration will make the cutting amount of the circumferential edge of the milling cutter uneven, and the cutting and expanding amount will be larger than the original value. The consequence will be the accuracy of the machining and the service life of the tool. However, when the width of the processed groove is too small, the tool can be effectively vibrated, and the required groove width can be obtained by increasing the cutting and expanding amount. It is reminded that in this case, the greater amplitude of the milling cutter should be below 0.02mm , Otherwise stable cutting cannot be performed. In normal processing, the vibration of the milling cutter is as small as possible.
When tool vibration occurs, you should consider reducing the cutting speed and feed rate. If both have been reduced by 40% and there is still greater vibration, you should consider reducing the amount of tooling.
If the processing system resonates, the reason may be excessive cutting speed, low feed rate, insufficient rigidity of the tool system, insufficient workpiece clamping force, and workpiece shape or workpiece clamping essentials. At this time, adjustments should be taken. Measures such as increasing the rigidity of the tool system and increasing the feed rate.
The rotating operation of cemented carbide milling cutters can be divided into two types. The following is a brief analysis of Noble Tool Manufacturers for you:
First, the rotation direction of the milling cutter is the same as the cutting feed direction. At the beginning of cutting, the milling cutter bites the workpiece and cuts off the chips.
Rotation operation of cemented carbide milling cutter
The other is reverse milling, where the rotation direction of the milling cutter is opposite to the cutting feed direction. Before starting to cut, the milling cutter must slide a section on the workpiece, starting from the zero cutting thickness, and reaching the maximum cutting thickness at the end of the cutting. The cutting force direction of the face milling cutter is different, some end milling or face milling. In the face milling cutter processing, the milling cutter is just outside the workpiece, so the direction of the cutting force should be paid more attention. In forward milling, the cutting force forces the workpiece into the table, and in backward milling, the cutting force forces the workpiece to leave the table.
Because the cutting effect of forward milling is better, forward milling is generally used, and backward milling is only considered when there are thread gaps or unsolvable problems in forward milling.
What should we do when the milling cutter vibrates?
2021 12/06