More on the lathe, the use of the linear motion of the workpiece rotation and tool or curve motion to change the shape and size of the blank, processing it to conform to the requirements of the drawings.
Ordinary machine tool is more and more difficult to meet the needs of processing precision parts
, at the same time, due to the improvement of production, from time to time, decrease in the price of the CNC machine.
CNC precision parts processing mainly has the ultra-precision turning, mirror grinding and grinding etc.
The first premise of CNC precision parts processing is the accurate process benchmark, the benchmark on the mechanical drawings are in capital letters A, B, C, D, etc with A specific reference symbol with ring, when the benchmark symbol on the surface and the extension of line or the surface size limit, said on the surface as A benchmark.
When the benchmark the size of the symbols on the line, said in the dimensioning of the center line of the entity as a benchmark.
As you mentioned in front of the process precision is a more general point.
When used to determine the fabricated parts assembly benchmark, refers to the position precision in the component or product.
Measurement benchmark, refers to the parts inspection, used to be the size and location of the measurement process looks specification.
Locating datum, refers to the process, the workpiece in the machine or jig for positioning in the benchmark.
CNC precision parts processing technology benchmark is the prerequisite of produce quality parts.
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