How to improve the cutting efficiency of CNC machining

cnc machined part

cnc machined part

I、In the cutting process of CNC machine , the role of metal cutting tools is no less than that of Watt’s invention Steam engine. The material used to make the tool must have high high temperature hardness and wear resistance, and must Required bending strength, impact toughness and chemical inertness, good manufacturability (cutting, Forging and heat treatment, etc.), not easy to deform. Good tool materials at home and abroad Mainly include: cermet, cemented carbide coated tools, ceramic tools, polycrystalline diamond (PCD) and cubic boron nitride (CBN) tools, etc. They have their own characteristics and adapt to The workpiece material and cutting speed range are different. CBN is suitable for cutting high hardness quenching Hard steel and hard cast iron, such as machining high-hard steel parts (50~67HRC) and chilled cast iron


Ceramic tools and CBN tools should be used, and the machining hardness is below 60~65HRC Ceramic tools can be used for workpieces, and CBN tools can be used for workpieces above 65HRC. Cutting; PCD is suitable for cutting non-ferrous metals, alloys, plastics and glass fiber reinforced plastics.


II、Choose high-precision blades. The runout of the blade on the high precision CNC machine shop should be controlled within 2~5um. With the development of CNC machining, the surface modification coating treatment of the blade (the substrate is high-speed steel, WCo cemented carbide, Ti-based cermet) has appeared, which greatly improves the accuracy of the blade. At the same time, a variety of new indexable insert structures have emerged, such as high-efficiency scraping inserts for turning, complex-shaped front-angle milling cutter inserts, ball-end end milling cutter inserts, and high-speed milling cutter inserts that prevent flying. Wait. Indexable inserts have entered a new stage of comprehensive development of materials, coatings, and geometries. According to the functions of materials, coatings, and geometries, they can be developed to develop inserts with the best processing results to meet high-speed requirements. , Different requirements of high-life cutting production technology.

III、Choose a reasonable processing route. cnc machining services , especially machining centers with more than 4 axes, are generally one-time clamping, multi-directional processing and have a tool magazine that can automatically change the tools for one-time processing. Therefore, determining the correct and simple processing route is the basis for ensuring processing quality and improving efficiency. The main principles for determining the machining route during programming are: it should be able to ensure the machining accuracy and surface roughness requirements of the parts; the machining route should be shortened as much as possible to reduce the idle movement time of the tool; the numerical calculation should be simple, and the number of program segments should be small to reduce Programming workload. For example, for hole processing with high position accuracy and dimensional tolerances, the processing route of the hole diameter less than 18-20mm is drilling the center hole-drilling-reaming-reaming and the processing technology of the hole diameter is 18-20mm. The route is drilling, reaming, rough boring, and fine boring.


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