We may have a different understanding of precision machining. How to understand precision machining? How to define Precision Machining? What is the definition of precision machining?
I think: the definition of precision machining is, according to the steps, according to the process to complete the final processing of each major surface, including the parallelism of the workpiece, surface finish, surface perpendicularity, surface hardness, etc., so that the machining accuracy of the part and the quality of the machined surface to meet the requirements of the drawings of the process.
Parallelism requirement
The so-called parallelism requirement is to require the tolerance requirements around the workpiece, let's say a rectangular workpiece, the thickness of the four corners of the workpiece is required to reach a certain tolerance range. If the measured thickness of the four sides does not meet the tolerance requirements, then the parallelism requirements are not met. This requires readjustment of the workpiece, the problem may arise in the grinding machine suction cups, suction cups due to overuse, wear and tear, resulting in errors in parallelism; it may also be that the grinding wheel is not dressed, or the grinding wheel chipped, chipped, this time to re-grind the grinding wheel; it may also be that the suction cups are not cleaned, which requires re-cleaning the suction cups, carefully clean; it may also be that the workpiece is not dressed, burrs.
Perpendicularity requirement
The so-called verticality requirement is to require the side of the workpiece and the ground to meet the tolerance requirements. The best understanding is justified body, from the number of axes, divided into XYZ three sides, generally required XZ, YZ to meet the tolerance requirements. The error is also roughly the same as the parallelism requirement. Generally according to the parallelism requirements to deal with then.
Other requirements
Such as, the degree of finish. Then the requirements to achieve, such as mirror effect, etc.
