Precision parts processing precision and interchangeability
发布时间:2014/5/21 浏览次数:958
A, the interchangeability of parts
Machine by the long-term production operation, some parts will wear, deformation and scrap, switch to a new parts.These parts are
called accessories or spare parts.Accessories or spare parts without replacement or selected, installed on the
machine can operate, known as interchangeable.
When parts are manufactured in order to achieve the compatibility, it wants to put the size of the parts
geometric shape, etc are doing the same.Agreement is not required to do perfectly
(economic, do both neither is impossible), as long as the size of the parts, such as geometry control within
a permissible range, making parts and other parts together with the combination of the same performance.
The allowed error range, that is, position tolerances.
Second, precision parts processing quality by machining accuracy:
1. The geometry precision
Geometric accuracy refers to the component parts of each or axis of the accuracy of the geometry
of the surface, such as whether line is straight, surface flat, cylindrical on all normal section are round and so on.
The allowed scope of changes to "tolerance", form tolerance, the smaller the number, shape accuracy is higher.
2. The dimensional accuracy
Dimensional accuracy refers to the parts processing after the accurate size, with the dimensional tolerance.
Parts of the same size, the higher the accuracy, tolerance of the smaller number.
3. The location accuracy
Location accuracy refers to the component parts of the accuracy of the position between the surface, such as
whether two plane are parallel, vertical, whether two axis coaxial, etc., to "position tolerance".
The shape and position tolerance, hereinafter referred to as "tolerance".
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