Machining error of mechanical parts is the degree of deviation between the actual geometric parameters (geometry, geometry and mutual position) of the part after machining and the ideal geometric parameters, the smaller the machining error, the higher the degree of conformity, the higher the machining accuracy. Machining accuracy and machining error are two ways of saying the same thing.
Mechanical parts processing errors that are likely to occur.
1, positioning error: positioning error mainly includes the benchmark does not overlap error and positioning vice manufacturing inaccuracy error.
2, measurement error: parts in processing or measurement after processing, due to the measurement method, gauge accuracy and workpiece and subjective and objective factors directly affect the measurement accuracy.
3, tool error: any tool in the cutting process is inevitable to produce wear and tear, and thus cause the size and shape of the workpiece to change.
4, fixture error: the role of the fixture is to make the workpiece equivalent to the tool and machine tool has the correct position, so the geometric error of the fixture on the machining error (especially the position error) has a great impact
5, the machine tool error: including spindle rotation error, guide error and drive chain error. Spindle rotation error refers to the actual axis of rotation of the spindle moment relative to its average axis of rotation of the amount of change, it will directly affect the accuracy of the workpiece being machined.