Which parts are suitable for precision machining?

We know the precision machining of precision requirement is high, precision machining of good rigidity, manufacturing high accuracy, precision of the knife, so can machining accuracy demanding parts, which is suitable for precision machining parts?

 

We know the precision machining of precision requirement is high, precision machining of good rigidity, manufacturing high accuracy, precision of the knife, so can machining accuracy demanding parts, which is suitable for precision machining parts?

 

First of all, relative to ordinary lathe, numerical control lathe with constant cutting function. No matter for surfacing or different diameter cylindrical can use the same linear velocity processing, namely to ensure the consistent and relatively small surface roughness values. And ordinary lathe is constant rotational speed, diameter of different cutting speed is different, the workpiece and tool materials, finish machining allowance and tool Angle certain cases, the surface roughness depends on the cutting speed and feed speed.

 

When processing the surface roughness of different surface roughness of the surface of the small and the use of small feed speed, roughness of surface with larger feed rate, variability is very good, that it's hard to do on the ordinary lathe; Contour shape complex parts, any plane curve can be in a straight line or arc approximation, precision machining with circular arc interpolation function, can process all kinds of complex contour parts, the use of precision machining quality need operator carefully use.

 

 

Precision machining mainly includes fine car, fine hall, fine iron, fine grinding and grinding processes:

 

1. Most of the precision of light alloy (such as aluminum or magnesium alloys) parts in this way more processing, generally using natural single crystal diamond tool, the blade arc radius is less than 0.1 microns, on the high precision lathe processing 1 micron precision can be obtained and the average height difference is less than 0.2 microns of surface roughness, the coordinate accuracy of + 2 microns.

 

2. Fine iron: used for processing complex shaped aluminum or wrinkle alloy structural parts, relying on the precision of the guide rail and spindle of the machine tool to obtain high mutual position accuracy, the use of carefully grinding diamond cutter head for high-speed iron cutting can obtain accurate mirror.

 

3. Fine grinding: used for machining shaft or hole parts. Such parts most hardened steel, has high hardness, most of the high precision grinding machine spindle using static or dynamic pressure liquid bearings, to ensure high stability. In addition to the limit of the grinding precision machine tool spindle and the influence of the lathe bed stiffness, and the choice of grinding wheel and balance, the machining precision of work piece center hole factors, such as fine grinding 1 micron size accuracy can be obtained and the out of roundness of 0.5 microns.

 

4. Grinding: using the mating parts on the principle of mutual abrasion of the processed surface irregular convex part of the selection process, particle diameter, cutting force and cutting heat can be precisely controlled, so it is to obtain the highest accuracy in precision machining technology of machining method. The precision servo parts in aircraft hydraulic or pneumatic fittings, dynamic pressure gyro motor bearing parts are using this method of processing, in order to reach 0.1 and 0.01 micron precision and micro roughness of 0.005 microns.

 

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