The role of geometric tolerancing in mechanical manufacturing

1) improve measurement efficiency at a lower cost: compared with similar products, its cost is very low, and the measurement efficiency has a greater improvement;

2) improve the accuracy of measurement: the traditional way of using the surveyor's visual viewing of the method is prone to lead to incorrect measurement results;

3) traceability of data: to save the record of the data, and can be traced back and analyzed. The traditional model due to no real-time records, traceability is poor analysis.

Tolerance principle is the correct handling of the relationship between dimensional tolerances and geometric tolerances of the provisions. Design according to the functional requirements, the rational choice of tolerance principles. Dimensional tolerances and geometric tolerances are related to each other is called the relevant requirements. Dimensional and geometric tolerances are not related to each other is called the principle of independence.

Expanded Information

Maximum Solid Requirements:

Maximum Solid Requirements are applicable to derived elements, and refer to the combined result of applying a maximum solid-effect boundary to control the actual dimensional and shape errors of the element being measured at the time of design. The element is required to have an actual contour that does not exceed the maximum solid-effect boundary and an actual size that does not exceed the limit size. When associating elements, the boundary is correctly positioned in relation to the datum.

When an element is required to have a maximum solidity, the geometric tolerance box for that element should be labeled with the symbol M. When a datum element is considered to be related to the element under test, the datum letter in the positional tolerance box for the element under test should be labeled with the symbol M.

Baidu Encyclopedia - Geometric Tolerancing