A STEP AP 203–214-based machinable volume identifier for identifying the finish-cut machinable volumes from rough-machined parts

Abstract

This paper presents a STEP AP203-214-based machinable volume identifier (MVI) to identify the finish-cut machinable volume in prismatic parts by deducting the rough-machined part from the final part. The MVI provides an intermediate link between rough and finish machining computer-aided process planning system for automatic generation of process plans while machining prismatic parts. To calculate the machinable volumes of manufacturing features, the MVI utilizes the output of the feature identifier which contains the information about the dimensional details, edge loops, edges, vertices, coordinate points, and location planes of the features. In this research, a total of 234 features have been considered; out of which, 32 are normal and 202 are tapered. To calculate the machinable volumes for these features, generalized methodologies are developed for 17 basic feature types, each having a varying number of specific features. Initially, the pattern strings are generated for the front and back face of the rough-machined feature and final feature. Then, MVI uses the predefined syntactic pattern strings stored in the strings database and checks with the generated strings of the feature to determine the shape of the machinable volume stored in the volumes database. After determining the shape, one relevant methodology or more (for features having combination of more than one taper) are selected from among the 17 "feature type" specific methodologies developed for finish-cut machinable volume identification. In this article, methodology is presented for one basic feature type which covers 14 features and explained through one case study. The final output from this module is stored as a text file with full dimensional details of machinable volumes for later use inside the machining planning module. The proposed MVI can be used in Computer Integrated Manufacturing Industries as an intermediate linker to achieve a robust manufacturing environment.

A multi-perspective dynamic feature concept in adaptive NC machining of complex freeform surfaces

“…They used the slice method to generate multiple layers and each layer has the same type of parameters to plan the machining parameters for high speed machining. Arivazhagan et al [13] In feature based process planning, features are linked to manufacturing knowledge of various types like machine tool selection, cutter determination, cutting parameters planning. You et al [15] introduced a cutter selection method for pocket feature, and the combination of the optimal tools for the whole machining process of pocket could be generated by simplifying 3D features to 2D boundaries.…”

Selection of a green manufacturing process based on CAD features

“…Based on feature technology, Jiang et al propose an automatic process planning system for the quick generation of manufacturing process plans directly from CAD drawings [8]. Features are also used to identify the finish-cut machinable volume by getting the rough-machined part from the final part [9]. Moreover, we find in literature different researches which are oriented to elaborate a process sequence in a CAPP for a component based on features.…”

Developing a STEP-Compliant Multiagent on an Interoperable and Integrated CAD/CAM Platform

“…Machining workingsteps represent the machining process for a specified area on the work piece, for example, a feature. Taking AP 203/214 as the input, Arivazhagan et al subtract the rough-machined part from the final part to identify the finish-cut machinable volumes in prismatic parts [34]. Nevertheless, the outcome could not be restored in compliance with STEP standard and intersecting features are not discussed.…”