GD&T and Functionality
There are absolute advantages of using GD&T but at the same time, it is a misconception that “The GD&T drawing is all you need” to ensure both functions and be a guide for the manufacturing process. There is a need for a completely different approach to data evaluation.
While the GD&T requirements target the combined effects of all factors: size, location, orientation, the needs of the manufacturing analysis are very different and require the separation of factors. There are fundamental differences between “evaluation of measurements to ensure function” and “evaluation of measurements to provide direct feedback to manufacturing”. These differences involve the datums used, the role of coordinate systems as opposed to DRFs, the mathematical algorithms used, the philosophy of the presentation of the results – to mention a few.
EVOLVE Manufacturing presents to you both GD&T and Functionality
EVOLVE Manufacturing graphically displays measured results based on design or manufacturing datums, producing fast results for proper manufacturing machine adjustments and how adjustments made impacts GD&T tolerance. EVOLVE Manufacturing helps to find out why a part has failed during the GD&T evaluation and helps the user to find out, which corrective action(s) can fix the manufacturing issue.
EVOLVE Manufacturing allows both 3D or 2D analysis of part features displaying diﬀerent groups based on the applied alignment and error component.
Grouping of Features
EVOLVE Manufacturing creates groups of part features to help identify certain part characteristics. The groups are determined by diﬀerent manufacturing operations, tools, and alignments.
Importing from CAM the needed manufacturing information simplifies the information gathering by using the CAM’s G-code.
Changing one work offset (coordinate systems) on the machining side can affect many independent GD&T tolerances.
EVOLVE Manufacturing alignment is performed for every group created. Groups are developed independently from each other, but alignments are common for all created groups.
Point deviations are separated into 4 error categories:
- and form
These categories can be used individually, together or all at once
Corrective actions can be applied based on deviation statistics, which can fix the manufacturing process