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What is the grading of CNC Machining accuracy?

The existing CNC machining process requires the highest grinding accuracy with the smallest tolerances. Punching machine, Die Casting and other stations can be taught high, master the precision tolerance of each process, so that the CNC machining center can play a good characteristic. For different industries, the accuracy level of different products is also different, let's take a look together!

Generally speaking, IT6 is widely used in CNC machining and processing of important matching indicators, according to international precision tolerances. IT6 means that the mating surface has high uniformity requirements, can ensure quite high mating performance, stable and reliable use, machining center can complete drilling, milling, boring, expanding, hinging, tapping and other processes.

Drilling is an important process of machining center, drilling is the basic method of machining holes, generally drilling on drilling machines, lathes, some precision requirements are relatively high, can also be completed by CNC machining centers. The drilling accuracy is not high, generally only 12.5~6.3μm, and the surface roughness of the workpiece is generally only 12.5~6.3μm, but the subsequent semi-finishing and finishing is generally completed by reaming and reaming.

Milling is the most important machining operation of CNC machining centers, it can be said that all machining in CNC machining centers is carried out with milling cutters. Milling can be divided into conventional milling and climb milling according to the different feeds. Cutting workpieces with rotary multi-edged tools is an efficient and commonly used machining method. It is used to machine surfaces of various complex shapes such as flat and grooved shapes, such as surface molds. The surface roughness of the workpiece processed with this tolerance accuracy is between 0.63~5 microns, and the precision tolerance of finishing milling can generally reach IT16-IT8 level.

Bore machining is usually done by boring. A CNC machining method that uses tools to enlarge the aperture or trim the circumferential profile, usually used to convert semi-roughing into finishing. For steel structural parts, the boring accuracy error level can reach IT9-IT7, and the surface roughness is 2.5~0.16 microns.

CNC machining manufacturers

The above is the grading of the rough surface degree and CNC machining accuracy using CNC. I believe that you can see that you basically have a certain understanding of CNC machining technology. Generally speaking, the surface roughness of CNC turning is 1.6-0.8μM, the surface roughness of grinding is generally 1.25-0.16μM, and the general surface roughness of milling is 6.3-1.6μM. Of course, these parameters can be used for reference, and the specific situation shall prevail.