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Control of Parts - Secondary 3
Concept sheet | Science and Technology
Table of contents
The control of parts makes it possible to verify the conformity or the quality of a part to the requirements described in the manufacturing process sheet. Controls are carried out not only during, but also after the part’s manufacturing process. Following the control, a part can be approved, reworked, or rejected. When inspecting a part, elements that can be examined are the flatness (without bends or twists) of a surface, the measure of an angle, a dimension, etc.
The control of the part’s dimension is done by direct measurement or by indirect measurement.
Control by Direct Measurement
Direct measurement consists of evaluating, with a measuring tool, whether the actual dimensions of a part correspond to the ones in the detail drawing.
The person in charge of the control uses various tools for direct measurement, such as a ruler, digital caliper, or a three-dimensional measuring machine.
A ruler
A digital caliper
A coordinate measuring machine (CMM)