Views: 70 Author: Site Editor Publish Time: 2022-06-08 Origin: Site
Most of the milling cutters used in machining centers are clamped by spring clamp set and are in cantilever form when used. In the milling process, sometimes there may be milling cutters from the tool holder gradually extended, or even completely fall off, resulting in the scrapping of the workpiece phenomenon, the cause is generally due to the tool holder bore and tungsten steel milling cutter shank outside diameter is stored between the oil film, the formation of insufficient clamping force.
The tungsten steel milling cutter is generally coated with anti-rust oil, if cutting with non-water-soluble cutting oil, the inner hole of the tool holder will also be attached to a layer of foggy oil film, selling the tool holder and the tool holder are in the oil film, the tool holder is difficult to firmly clamp the tool holder, tungsten steel milling cutter in the processing is easy to loosen and fall. Therefore, before the tungsten steel milling cutter is clamped, the shank of the milling cutter and the inner hole of the tool holder should be cleaned with cleaning liquid and dried before clamping.
When the diameter of the tungsten steel milling cutter is large, even if the shank and the tool holder are clean, it may still happen that the cutter is dropped, so the shank with the notch for cutting and the corresponding side locking method should be used.
Another problem that may occur after the clamping of tungsten steel milling cutter is the processing of tungsten steel milling cutter in the clip port broken, the reason is generally due to the use of the clip rod is too long, the clip port has worn into a tapered, at this time should be replaced with a new clip.
As the tungsten steel milling cutter and the tool holder is existing between the tiny gap, so in the process of processing the tool has the possibility of vibration scene. Vibration will make the milling cutter circumferential edge of the eating amount is not uniform, and cut expansion than the original value increases, affecting the processing accuracy and tool life. However, when the groove width is small, the tool can be vibrated purposely to increase the cutting and expanding volume to obtain the required groove width, but the maximum amplitude of the tungsten steel milling cutter should be below 0.02mm in this case, otherwise it cannot carry out stable cutting. The smaller the vibration of tungsten steel milling cutter in normal processing, the better.
When the tool vibration occurs, you should consider reducing the cutting speed and feed rate, if both have been reduced by 40% and still have a large vibration, then you should consider reducing the amount of tool eating.
If the processing system resonance, the cause may be too large cutting speed, feed rate is small, insufficient rigidity of the tool system, workpiece clamping force is not enough and the shape of the workpiece or workpiece clamping elements and other factors, at this time should be taken to adjust the cutting amount, increase the rigidity of the tool system, improve the feed rate and other measures.