1. Tungsten steel milling cutters The clamping tungsten machining cutters are mostly made of spring clamps, which are in a cantilever state when used. During the milling process, sometimes the vertical tungsten steel milling cutter may gradually protrude from the tool holder or even fall completely, causing the workpiece to be scrapped. The reason is generally because the tool holder inner hole and the vertical tungsten steel milling cutter handle There is an oil film between the outer diameters, resulting in insufficient clamping force. Tungsten steel milling cutters are usually coated with anti-rust oil. If non-water-soluble cutting oil is used for cutting, the inner hole of the holder will also adhere to a misty oil film. When there is oil film on the holder and the holder, It is difficult for the tool holder to firmly clamp the shank, and the processing of the neutral tungsten steel milling cutter is easy to loosen and fall. Therefore, before the vertical tungsten steel milling cutter is clamped, the shank of the vertical tungsten steel milling cutter and the inner hole of the tool holder should be cleaned with a cleaning liquid, and then dried and then clamped. When the diameter of the vertical tungsten steel milling cutter is large, even if the shank and the tool holder are clean, a knife-off accident may occur. In this case, a shank with a flattened notch and a corresponding side locking method should be used. Another problem that may arise after clamping the tungsten steel milling cutter is that the machining neutral tungsten steel milling cutter is broken at the tool holder port. The reason is generally because the tool holder has been used for too long, and the tool holder port has been worn into a tapered shape. Therefore, a new tool holder should be replaced at this time.

2. Vibration of tungsten steel milling cutter Due to the slight gap between the vertical tungsten steel milling cutter and the tool holder, the knife may have vibration phenomenon during the machining process. The vibration will make the circumference of the vertical tungsten steel milling cutter uneven, and the amount of cut and enlargement will increase than the original value, which will affect the machining accuracy and tool life. However, when the width of the groove is small, the tool can be purposefully vibrated, and the required groove width can be obtained by increasing the amount of cut, but in this case, the maximum amplitude of the tungsten steel milling cutter should be limited to 0.02. Below mm, otherwise stable cutting is not possible. The smaller the vibration of the normal processing neutral tungsten steel milling cutter, the better. When tool vibration occurs, consider reducing the cutting speed and feed rate. If there is still a large vibration after both have been reduced by 40%, you should consider reducing the amount of knife. If the resonance occurs in the processing system, the cause may be due to excessive cutting speed, small feed speed, insufficient rigidity of the tool system, insufficient workpiece clamping force, and workpiece shape or workpiece clamping method. Measures such as increasing the amount of the tool system, increasing the feed rate, and increasing the feed rate.

3. The end edge of the vertical tungsten steel milling cutter is cut in the numerical control milling of the workpiece cavity such as the mold. When the cutting point is a concave part or a deep cavity, the extension amount of the long tungsten steel milling cutter needs to be lengthened. If a long-edge vertical tungsten steel milling cutter is used, it is easy to generate vibration and cause tool breakage due to the large deflection of the tool. Therefore, in the process of machining, if only the cutting edge near the end of the tool is required to take part in the cutting, it is better to use a short-blade long-shank type tungsten steel milling cutter with a long total tool length. When machining a workpiece with a large-diameter vertical tungsten steel milling cutter on a horizontal CNC machine tool, due to the large deformation caused by the tool's own weight, more attention should be paid to the problem that the end edge cutting is prone to occur. In the case where a long-edge vertical tungsten steel milling cutter must be used, it is necessary to greatly reduce the cutting speed and the feed speed.

4. Selection of cutting parameters The choice of cutting speed depends mainly on the material of the workpiece to be machined. The choice of feed speed depends mainly on the material of the workpiece to be machined and the diameter of the vertical tungsten steel milling cutter. Tool samples from some foreign tool manufacturers are attached with a tool cutting parameter selection table for reference. However, the selection of cutting parameters is affected by many factors such as the machine tool, the tool system, the shape of the workpiece to be machined, and the clamping method. The cutting speed and feed rate should be adjusted according to the actual situation. When the tool life is a priority, the cutting speed and the feed rate can be appropriately reduced; when the cutting edge of the chip is not good, the cutting speed can be appropriately increased.

5. The choice of cutting mode adopts down-cut milling to prevent the blade from being damaged and improve the tool life. However, there are two points to note: 1 If using ordinary machine tools, try to eliminate the gap of the feed mechanism; 2 When the surface of the workpiece remains with an oxide film or other hardened layer formed by casting or forging, it is advisable to use up-cut milling.

6. The use of tungsten steel milling cutters The use range and use requirements of high-speed steel vertical tungsten steel milling cutters are relatively wide. Even if the selection of cutting conditions is slightly inappropriate, there will not be too much problem. While the tungsten carbide steel milling cutter has good wear resistance during high-speed cutting, its use range is not as wide as that of high-speed steel vertical tungsten steel milling cutter, and the cutting conditions must strictly meet the requirements of the tool.