Overview of the fixture

by:Top Talent     2020-04-01
Gage is a special inspection equipment used to measure and evaluate the size and quality of parts. At the part production site, the on-line inspection of the part is achieved through the inspection tool. To this end, the part needs to be accurately installed on the inspection tool, and then the visual inspection, or measurement table, or caliper can be used to inspect the part profile and surroundings. Inspection pins or visual inspections are used to visually inspect the holes of different properties on the parts and the connection positions between the parts and parts, so as to ensure the rapid judgment of the quality status of the parts during production. In this case, it can be judged by visual inspection or measurement: the deviation between the size and shape area of ??the contour of the part and the relative position and the theoretical value of the fixture directly processed by CAD / CAM. For some extremely important functional dimensions on the part, it is also possible to use a check fixture for numerical inspection. Usually, the precise coordinate values ??of the parts based on the body coordinate system cannot be directly obtained with the aid of a check fixture. Instead, the parts are placed on the check fixture and measured by a coordinate measuring machine. The structure of modern inspection fixtures is designed while considering that it can be used as a measurement stand. However, when the online inspection function of the test fixture and the function of the measurement support cannot be satisfied at the same time, the online inspection function of the test fixture should be satisfied first. The measuring support is an auxiliary support when measuring a part with a coordinate measuring machine. All the supporting surfaces (points) and positioning reference surfaces (points) must be milled according to the CAD data of the part. The measuring support for some special parts should also be With the function of some check fixtures. The fixture is a special inspection equipment customized according to the requirements of the customer. The design of the fixture must be in accordance with the final 3D data and 2D drawings provided by the customer. The 3D data must have the correct automobile coordinate system. The design and manufacture of the fixture must pass the customer's Approval is required for processing and delivery.
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