The positive and negative errors of precision parts processing are only qualified parts within the specified range of requirements, otherwise they are unqualified parts; for example, if the diameter of an embedded cylinder is too large and exceeds the allowable error range, it will cause failure to insert In the case of entering, if the actual diameter is too small and exceeds the lower limit of the allowable negative value of the error, it will cause the insertion to be too loose and the problem of not firmness will occur.

The machining accuracy is up to 0.002mm, and the detection accuracy is up to 0.001mm. Choose Shilihe for precision machining, and the products you receive are truly up-to-standard products. The number of tooling is reduced, and complex tooling is not required to process parts with complex shapes; the processing quality is stable, the processing accuracy is high, and the repeatability is high, which is suitable for the processing requirements of aircraft.





Determine the machine tool, clamping method, measurement method, machining allowance, cutting amount and working hour quota used in each process. Fill in the contents on the process specification table, which is the specification of the machining process. If the positive and negative errors are within the specified range, they are qualified parts, otherwise they are unqualified parts; for example, if the diameter of an embedded cylinder is too large and exceeds the allowable error range, it will cause the situation that it cannot be inserted.

If the actual diameter is too small and exceeds the lower limit of the allowable negative value of the error, it will cause the insertion to be too loose and the problem of not firmness will occur. Burr refers to the removal of extremely fine microscopic metal particles on the surface of the workpiece, which are called burrs. They are formed during cutting, grinding, milling and other similar chipping processes. Workpiece surfaces, sharp corners and edges must achieve extremely high metal cleanliness and, if necessary, also suitable for electroless and plated metals. The traditional processes for deburring are mechanical processes such as grinding, polishing and other processes with different degrees of automation.