Which parts are suitable for precision machining?

Which parts are suitable for precision machining?

We know that precision machining precision of precision machining is very rigid, high precision, precision of the knife, so can process high precision of parts, so which parts are suitable for precision machining?Below is the chief engineer of Fuqiao Machinery to introduce it to you:

First of all, compared with ordinary lathe, CNC lathe has constant line speed cutting function.

No matter for the car end surface or different diameters of the outer circle can be processed with the same linear speed, that is, to ensure that the surface roughness value is consistent and relatively small.

And the ordinary lathe is a constant speed, different diameter cutting speed is different, in the workpiece and tool material, finishing margin and tool Angle is certain, the surface roughness depends on the cutting speed and feed speed.

When processing the surface with different surface roughness, small feed speed, large roughness surface larger feed speed, variability is very good, this is difficult to do in the ordinary lathe; the contour shape complex parts, any plane curve can be approached by straight or arc, CNC precision machining has circular arc insertion function, can process a variety of complex contour of parts, the use of CNC precision machining needs the careful use of the operator.

CNC precision machining mainly has refined car, fine boring, fine milling, fine grinding and grinding and other processes:

(1) fine car and fine boring: most of the aircraft precision of light alloy (aluminum or magnesium alloy, etc.) parts using this method, generally with natural single crystal diamond tool, blade arc radius is less than 0.1 microns, in high precision lathe machining can obtain 1 micron precision and average height difference is less than 0.2 microns surface level, coordinate accuracy can reach ± 2 microns.

(2) Precision milling: used for processing complex shapes of aluminum or beryllium alloy structural parts, relying on the precision of the machine tool guide rail and the main shaft to obtain high mutual position accuracy, using carefully grinding diamond blade for high-speed milling can obtain precision mirror.

(3) Fine grinding: used for machining shaft or hole parts.

Most of these parts are made of hardened steel, with high hardness, most of the high precision grinder spindle with static pressure or dynamic pressure liquid bearing, to ensure high stability.

The limit precision of grinding is not only affected by the stiffness of the machine spindle and the bed, but also related to the selection and balance of the grinding wheel, the machining precision of the central hole of the workpiece and other factors. Fine grinding can obtain the size precision of 1 micron and the iroundness of 0.5 micron.

(4) Grinding: using the principle of mutual research to select and process the irregular convex parts on the processed surface, the grinding grain diameter, cutting force and cutting heat can be accurately controlled, so it is the processing method to obtain the highest precision in the precision machining technology.

The hydraulic or pneumatic coordination parts in the precision servo parts of the aircraft and the bearing parts of the dynamic pressure gyro motor are processed in this method to achieve the precision of 0.1 or even 0.01 micron and the microscopic irregularities of 0.005 micron.

stainless steel die casting