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Home >> The types and usage of end mill
The types and usage of end mill
Click:3676 Date:2012-12-28 10:00:41
Cutter many types of different structures, a wide range of applications, their use can be divided into the following three categories:
Machining plane with thimble
Processed the trench with tungsten steel
Processing forming surface with a cutter and other three categories.
The general specifications cutter standardized, generally by professional tool manufacturers. Now introduce several common cutter features and its scope of application.
The cutters rotating tool polydentate each one tooth are the equivalent of a turning tool fixed to the rotating surface of the milling cutter. Milling at the same time to participate in cutting longer cutting edge, and no air travel, Vc is also higher, so higher productivity.
Cylindrical cutter
Cylindrical cutters are generally made of high speed steel integral, spiral-shaped cutting edge located on the cylindrical surface and the secondary cutting edge, the helical cutter cutting and is gradually cut from the workpiece, the cutting process is more stable . Mainly used for processing width is smaller than the cutter length strip plane horizontal milling machine.
According to different processing requirements, the cylindrical cutter with coarse teeth and fine teeth of coarse teeth chip flutes for roughing, fine tooth for finishing. Mill diameter is larger, often made of inlaid teeth.
Face milling cutter
The face milling cutter, the main cutting edge located on the surface of the cylindrical or conical end surface of the cutting edge of the secondary cutting edge, perpendicular to the axis of the milling cutter in the surface being processed. Can be divided into two categories of high-speed steel and carbide cutter material, multi-system sets-tipped knife material 40Cr.
The high-speed steel face milling cutter according to national standards, the diameter d = 80 ~~ 250mm, helix angle β = 10 ° knife number of teeth Z = 10 to 26.
Carbide face milling cutter, compared with the high-speed steel cutter, the milling speed is higher, the machining surface quality is also good, and processing with scleroderma, and the hardened layer of the workpiece, it is widely used. Carbide face milling the blade cutter installation can be divided into three position overall, a welding machine clip-style and can be transferred.
Processing stepped surface and a flat face milling cutter is mainly used on a vertical milling machine or a horizontal milling machine, particularly suitable for the processing of large plane, the main angle of 90 ° of the face milling cutter milling wider at the bottom of the stepped surface. Face milling machining plane, at the same time to participate in cutting knife teeth more, another vice cutting edge wiper role, the machined surface roughness value, so you can use the larger the amount of cutting and higher productivity, the wide range of applications.
End mill
End mills are the most commonly used a CNC milling cutter, its structure, the cylindrical surface of the cutting edge of the main cutting edge, the end surface of the distribution of the secondary cutting edge, the main cutting edge is generally helical teeth, and this can increase the cutting smoothly , and improving the machining accuracy. End face at the center of the cutting edge due to the common end mills, end mills work can not make axial feed, the end face of the blade is mainly used for processing and side perpendicular to the basal plane.
Chips curl in order to improve the situation, increasing the chip space prevent clogging knife Teeth relatively small, the radius of the arc of the chip flutes is greater. Usually the coarse tooth Li cutter number of teeth Z = 3 to 4, the serrations established milling Teeth Z = 5 to 8, the sleeve structure Z = 10 to 20, the circular arc radius r of the chip flutes = of 2 ~~ 5mm. When the larger diameter end mills ranging teeth can also be made from the structure, to enhanced vibration role, the cutting process is smooth.
The standard end mill helix angle β of 40 ° ~ 45 ° (the coarse tooth) and 30 ° ~ 35 ° (fine tooth), nested structures mills β = 15 ° to 25 °.
Smaller diameter end mills, generally made of Petiole form. φ2 ~ φ71mm endmills straight shank; φ6 to φ63mm the, end mills the Mohs push handle; the φ25 ~~ 80mm endmills with 7:24 taper shank of the screw holes, screw holes used to tighten tool . Diameter φ40 ~ φ160mm big end mills can do a self-contained structure.
The milling cutter for machining grooves, the stepped surface, and the use of cam processing forming surface. Another coarse teeth large helix angle mills, corn milling cutters, carbide waveform edge mills, their diameter is large, can use a large amount of feed, productivity is high.
And face milling cutter
And face milling cutter, can be divided into three edges straight teeth and face milling and wrong tooth. It is primarily used on a horizontal milling machine processing of the stepped surface and the end or the second end through a shallow trench. Outer circumference having a main cutting edge, the face milling cutter addition, the side surfaces are also the secondary cutting edge, thereby improving the cutting conditions, and to improve cutting efficiency, reducing the surface roughness value. Regrinding width dimensions change inlaid teeth and face milling cutter can solve this problem.
Saw cutter
Saw cutter, saw cutter itself is very thin, only on the circumference cutter for cutting the workpiece and milling narrow slots. To avoid folder knife, the thickness of the thinning edge to the center, so that both sides of the formation of the Vice declination.
Keyway milling cutter
National standard, straight shank the keyway cutter diameter d = 2 ~~ 22mm the taper shanks key fine cutter diameter d = 14 ~~ 50mm. E8 and d8 the keyway cutter diameter deviation. The circumference of the cutting edge of the keyway milling cutter wear occurs only near the end face of a short length, face cutting edge the regrinding just sharpening, regrinding cutter diameter unchanged.
Keyway cutters. Its shape and endmills similar, it is different on the circumference only two helical cutter, its end face of the cutter blade extends to the center, both as the milling cutter, and like a drill. Keyway milling both ends of the barrier for the right amount of axial feed. It is mainly used for processing Round closed keyway and use it to processing, the number of vertical feed and longitudinal feed can be completed Keyway.
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