(a) Part mode analysis
1. Verify the integrity and accuracy of component drawings
The machining program is written using the correct coordinate points
(1) The interrelationships between various geometric elements (tangent, intersection, vertical, parallel, concentric, etc.) must be clear.
(2) Various geometric conditions must be sufficient to avoid conflicting excess dimensions and closing dimensions that affect the process configuration.
2. Confirmation of mathematical model of automatic programming components
After establishing a mathematical model for complex surfaces, it is necessary to carefully study the integrity, rationality, and logic of geometric topological relationships of the mathematical model.
Integrity - Indicates whether the overall intent of the designer is expressed.
Rationality - Indicates whether the surface of the created mathematical model meets the requirements for surface modeling.
Topological relationship logic - can be used to create reasonable tool motion paths, such as whether the interrelationships between surfaces (such as positional continuity, tangent continuity, curvature continuity, etc.) meet specified requirements, whether surface trimming is clean and complete, etc. Initial instructors can use the correct mathematical model. Therefore, the mathematical model required for CNC programming must meet the following requirements
(1) A mathematical model is a complete geometric model that cannot duplicate or missing surfaces.
(2) Mathematical models have no diversity and there is no surface overlap
(3) The mathematical model must be a smooth geometric model.
(4) The mathematical model of the outer surface must be smooth to remove micro defects within the surface
(5) The curve distribution of surface parameters in the mathematical model is reasonable, and the surface has no abnormal ridges or depressions.