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The correct operation steps and matters needing attention for the installation and clamping of the milling cutter for CNC machining

Author : Date : 2018-11-12 9:09:34
 Most of the milling cutters used in machining centers are in the form of spring clamps, which are cantilevered during operation.In the process of milling, it is possible that the milling cutter will gradually fall out of the tool holder, resulting in the cutter falling off and the workpiece being scrapped. Generally, the reason is that there is an oil film between the outer diameter of the tool handle and the inner hole of the tool holder, leading to insufficient clamping force.

 

Generally factory shipment on the cutter coated with anti-rust oil, if cutting is used in water-soluble cutting oil, the oil will results in a hole in the cutter holder attached to a layer of mist of oil film, in this case, the handle and cutter is the presence of a layer of oil film, the knife clip will be difficult to handle grip, will lead to cutter in machining is loose and fall off.Therefore, before using the milling cutter clamps, you should clean the shank of the milling cutter and the internal hole of the cutter clamps with cleaning liquid, and then install the tool clamps after drying.

 

However, when the diameter of the milling cutter is large, even if the shank and clamps are cleaned very clean, there will still be possible knife accidents. At this time, the form of the shank with the cutting notch and the corresponding side locking should be adopted.Another problem that may occur after clamping of the milling cutter is that the milling cutter breaks at the end of the clamping during machining. This situation is generally caused by too long time of use of the clamping tool, which has caused the end part of the clamping tool to be worn into a cone.

 

The correct operation steps and matters needing attention of the milling cutter clamping for CNC machining tool!

 

Vibration of main milling cutter:

 

There will be some small gaps between the milling cutter and the cutter holder, which will cause the vibration of the cutter in the process of machining.The vibration will lead to uneven feeding of the circumferential edge of the milling cutter, which will increase the setting value of cutting and expanding ratio and seriously affect the precision of machining and the service life of the cutter.

 

However, when the groove width is too small, the tool vibration can be controlled, and the required groove width can be obtained by increasing the cutting and expansion. However, in this case, the maximum amplitude of the milling cutter should be controlled below 0.02mm, otherwise the cutting will not be stable.

 

In theory, the vibration of the milling cutter during normal machining is smaller and better.However, when there is cutter vibration, the first thing to consider is to reduce cutting speed and feeding speed. If both of them have been reduced to 40%, and there is still a large vibration of the cutter, it is necessary to consider reducing the feeding amount.If the machining part appears resonance phenomenon, the reason may be that the cutting speed is too high, the feeding speed is too small, the cutter is not rigid enough, the workpiece clamping force is insufficient, the workpiece shape or the workpiece clamping is not tight enough, and so on.