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Types and Applications of Common Milling Cutters for Vertical CNC Milling Machines(1)

Types and Applications of Common Milling Cutters for Vertical CNC Milling Machines(1)

2022-06-30 16:08:49

Common forms and working modes of Vertical NC milling machine

 

Vertical CNC milling machines can be divided into small and medium-sized ones. Small CNC milling machines are generally of vertical lifting table structure, that is, the main motion and feed motion of the machine tool are completed by the workbench; The Z direction of the main motion of the medium-sized vertical milling machine is completed by the spindle box, and the X and Y directions of the feed motion are completed by the workbench. As vertical CNC milling machines are generally three coordinate machine tools, according to the number of coordinate axes that can be controlled and linked, vertical CNC milling machines include three coordinate linked CNC milling machines and two-axes half coordinate linked CNC milling machines. Vertical CNC milling machines often process parts such as plane contour parts, spatial surface contour parts, and mold parts, which can be used for plane milling, plane cavity milling, contour milling, 3D, and above complex surface milling, etc.

 

cnc milling machine

 

Common cutting tools for large plane machining of vertical milling machines -- carbide indexable face milling cutters

 

  1. definition of face milling cutter

 

When the vertical NC milling machine processes large plane parts, it generally selects a face milling cutter, also known as an end milling cutter. The face milling cutter has a large diameter cutter head with a large cutting area and high cutting efficiency. The main cutting edge of the face milling cutter is distributed on the cylindrical and conical surfaces around the milling cutter, and the auxiliary cutting edge is distributed on the end face of the milling cutter.

 

  1. classification and application of carbide face milling cutter

 

The most commonly used face milling cutter of Vertical NC milling machine is carbide indexable face milling cutter, which can be divided into 45 ° face milling cutter, 75 ° face milling cutter, and 90 ° face milling cutter according to the main deflection angle of the blade. The 45 ° face milling cutter is often used because of its small vibration. It can process flat, inclined, and chamfered surfaces. When this kind of cutting tool is used to process flat surfaces, the blade breakage rate is low and the durability is high. Compared with the 90 ° face milling cutter, the 75 ° face milling cutter has better seismic resistance, and the cutting is stable and light. It should be selected preferentially in-plane machining. This kind of face milling cutter is a general-purpose cutter, which can be used for rough machining. A 90 ° face milling cutter can process both step surface and plane, but the vibration is large during processing, requiring the machine tool to have large power and enough rigidity. It is generally used for processing thin-walled parts.

 

  1. selection method of face milling cutter diameter and tooth number

 

When selecting the diameter of the face milling cutter, it is mainly necessary to consider that the power required by the cutter should be within the power range of the machine tool, and the diameter of the machine tool spindle can also be used as the basis for selection. The diameter of the face milling cutter can be selected according to the formula d=1.5d (D is the diameter of the spindle). In batch production, the tool diameter can also be selected according to 1.6 times the cutting width of the workpiece. The face milling cutter has coarse teeth, medium teeth, and fine teeth. The number of coarse teeth is small, the chip holding space is large, and the cutter tooth strength is large, which is suitable for rough machining; The medium tooth milling cutter has stable cutting and is widely used; The fine-tooth milling cutter has a large number of teeth, small chip holding space and low strength, which is suitable for finishing.

 

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