Machining accuracy refers to the degree to which the geometric elements of a machined part conform to the ideal part in terms of size, shape, and relative position. The closer the actual value is to the ideal value, the higher the machining accuracy.

Machining error refers to the deviation of the actual geometric parameters (size, shape, and relative position) of a machined part from the ideal geometric parameters.

Machining accuracy and machining error are essentially two perspectives on evaluating the same issue of part quality. Ensuring and improving machining accuracy is essentially about controlling and reducing machining error.

The Nature of Machining Error

Various single-factor errors can be classified into systematic errors and random errors based on their regularity when machining a batch of workpieces.

Systematic errors refer to errors whose magnitude and direction remain constant or change according to a certain pattern when sequentially machining a batch of workpieces. The former is called constant systematic error, and the latter is called variable systematic error. When machining a batch of workpieces sequentially, if the magnitude and direction of the error change irregularly, this type of error is called random error.

Statistical Analysis of Machining Accuracy

Currently, the main method for statistical analysis of machining accuracy is the distribution curve method. This method involves measuring the actual dimensions of a batch of machined parts, creating a dimensional distribution curve, and then using this curve to determine the magnitude of the error generated by the machining method.

Chenju Precision specializes in precision parts machining services, providing 3-axis, 4-axis, and 5-axis CNC machining, mill-turn machining, CNC lathe machining, and small-batch parts machining services. We excel at machining complex workpieces and can customize special fixtures and jigs for projects. Each product undergoes at least four full inspection processes, achieving a 99.93% quality pass rate. We provide high-quality small-batch customized machining services, with 3-day sampling and 7-day delivery.

If you have future projects requiring CNC machining, please send your drawings to this email address for an evaluation and quote: info1@us.cjcncmachining.com