Method for converting design feature model into manufacturing feature model based on intermediate model
An intermediate model and processing feature technology, applied in the field of CAD and CAM integration technology, can solve problems such as lack of user interaction means, unsatisfactory conversion results, and difficulty in obtaining conversion results, and achieve the effect of improving efficiency
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Embodiment 1
[0114] Figure 6 The design feature model DFM in is composed of 14 design features. According to the order of adding the design features, the 1st to 2nd design features are positive features, the 3rd to 8th design features are negative features, and the 9th to 14th design features are Concave fillet feature. exist Figure 6 The 1st to 8th design features are marked in , and the 9th to 14th features are located on the 6 concave edges of F7 and F8.
[0115] At the beginning of the algorithm, the design feature model DFM is empty, and the blank body is taken as the initial basic maximum processing body (assuming the initial basic maximum processing body B1), and its six processing directions are respectively represented by v1~v6, as shown in Figure 7 (a) shown. Figure 6 The first feature F1 is a boss feature (positive feature). After adding this feature and performing a Boolean subtraction operation on the feature bodies of B1 and F1, only one solid surface of the remaining ...
Embodiment 2
[0121] The design feature model of parts such as Figure 11 Shown (the front and back sides of the model are symmetrical). The model consists of 24 design features, including 5 extruded boss features, 15 extruded cut features and 4 fillet features.
[0122] Blank shape such as Figure 12 shown. After converting the design feature model DFM to the intermediate model IM according to the order of adding design features, there are 21 basic maximum processing bodies and newly generated maximum processing bodies after merging, numbered B1~B21, respectively, as Figure 13 shown. Table 1 lists all design features or sequences of design features that lead to the generation or change of each basic maximum processing body and the newly generated maximum processing body after merging.
[0123] Table 1 Correspondence between the largest processed body and design features
[0124]
[0125] When converting the intermediate model IM to the machining feature model MFM, there are multip...
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