Correct use of the number of teeth of the milling cutter for maximum product efficiency

In the manufacture of various CNC machine tools and other machinery, the application of CNC milling cutters is very extensive. In recent years, with the advancement of numerical control technology and the general improvement of automation, the production and application of machining center type machine tools, CNC lathes, and numerically controlled milling machines have become increasingly widespread. The demand for high-precision, high-efficiency CNC milling cutters has also increased. .

As manufacturers continue to introduce products with greater functionality and higher efficiency, the manufacture of milling machines becomes more and more complex and the difficulty becomes higher and higher. In addition to having complex contours and tighter tolerances, milling machines are often made of high-performance materials, which, while providing the required strength and reliability, also have an adverse effect on processability. As a common tool for processing planes, steps, grooves, forming surfaces, and cutting off workpieces on a milling machine, a milling cutter has one or more rotary cutters for the cutter teeth. Each cutter sequentially intermittently cuts off the workpiece while working. the amount.


In the process of milling with a milling cutter, it is important that the correct choice of the number of teeth of the milling cutter be used to achieve maximum processing efficiency. For example, a lagging cutter with a diameter of 100 mm has only 6 teeth, while a cleaver with a diameter of 100 mm can have 8 teeth. Whether the density of knife teeth or not will affect the level of production efficiency and the quality of the product. If the teeth are dense, the production efficiency will increase and the quality of the processed workpiece will be better. However, the dense teeth will also lead to the inconvenience of the chips. According to the diameter of the blade tooth, it can be divided into sparse, fine and dense teeth.


The sparse teeth are used for rough machining of workpieces. They have 1 to 1.5 blades per 25.4mm diameter, and the chip space is relatively large. This type of cutter is used for the cutting of soft materials that can produce continuous chips. Long blades and large widths are used for cutting. Density teeth are conducive to processing under steady conditions. They are generally used for the rough machining of cast iron, and are also suitable for shallow cutting, narrow cutting of high-temperature alloys and cutting without chip space. The dense teeth are used for finishing milling, and their axial depth of cut is 0.25-0.64mm. The cutting load per tooth is small and the required power is not large, such as for the processing of thin-walled materials. The size of the pitch will determine the number of teeth that will be involved in the cutting at the time of the milling. At least one of the blades should be cutting during the cutting to avoid milling impact, resulting in tool damage and overload of the machine.


In addition, the number of teeth on the blade must be selected so that the chips are properly curled and easily leave the cutting zone. Improper space in the chip can cause chipping, damage to the blade, and possible damage to the workpiece. At the same time, the blade should have enough density to ensure that not less than one blade is cutting at any time during cutting. If this is not ensured, it will cause severe impact, which will lead to the fracture of the blade, the damage of the tool and the machine tool. Overloaded.

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