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What are the manufacturing processes that cause errors in OEM machining?

A little carelessness during the OEM machining process will cause errors in the workpiece. What are the machining processes that are likely to cause machining errors? Do you know clearly?

The error of the machine tool province:

The errors of the machine tool itself mainly include errors of machine tool parts processing, spindle rotation errors, and guide rail errors.

Spindle rotation error refers to the variation of the actual rotation axis of the spindle at each instant relative to its average rotation axis, which will affect the accuracy of the workpiece to be processed in a straight line. The main reason for the rotation error of the main shaft is the error of the main shaft. The guide rail is a benchmark for the machine tool maker to determine the relative positional relationship of each machine tool component, as well as a benchmark for the movement of the machine tool. The manufacturing error of the guide rail, the uneven wear of the guide rail and the installation quality are important factors that cause the guide rail error.

Positioning error

Positioning errors mainly include reference misalignment errors and positioning manufacturing inaccuracy errors. When processing the workpiece on the machine tool, several geometric elements on the workpiece must be selected as the positioning reference during processing. If the selected positioning reference does not coincide with the design reference, there will be a reference misalignment error

The positioning surface of the workpiece and the positioning elements of the fixture together form the positioning point. The maximum position variation of the workpiece caused by the inaccurate manufacturing of the positioning point and the matching gap between the positioning points is called the inaccurate error of the positioning point manufacturing

Adjustment error

In each process of mechanical processing, the process system must always be adjusted in one way or another. Since the adjustment cannot be absolutely accurate, an adjustment error occurs. In the process system. The mutual positional accuracy of the workpiece and tool on the machine tool is guaranteed by adjusting the machine tool, tool, fixture or workpiece.

Geometrical error of the tool

It is inevitable that any tool will wear during the cutting process, and this will cause the size and shape of the workpiece to change. The influence of tool geometric error on machining error varies with different tool types.

Geometric error of the fixture

The role of the fixture is to make the tool and the machine tool have the correct position, so the geometric error of the fixture has a great influence on the machining.

Measurement error

When the part is measured during or after processing, the measurement method, the accuracy of the measuring tool, the workpiece and the subjective and objective factors directly affect the measurement accuracy.

The above six machining errors can be avoided to a certain extent, so the operators who need to perform machining can more carefully and carefully check the six machining processes that are prone to machining errors during processing and verify all parties Then perform machining operations, so that the impact of machining errors can be better reduced.

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