Explainable Artificial Intelligence for Manufacturing Cost Estimation and Machining Feature Visualization

TL;DR

This paper introduces an explainable AI process for manufacturing cost prediction from 3D CAD models, enabling visualization of influential machining features and aiding cost reduction during design.

Contribution

It proposes a novel 3D deep learning and visualization framework that explains manufacturing cost predictions and identifies key machining features.

Findings

High accuracy in cost prediction for CNC machined parts

Effective visualization of machining features influencing costs

Differentiation of machining difficulty for similar features

Abstract

Studies on manufacturing cost prediction based on deep learning have begun in recent years, but the cost prediction rationale cannot be explained because the models are still used as a black box. This study aims to propose a manufacturing cost prediction process for 3D computer-aided design (CAD) models using explainable artificial intelligence. The proposed process can visualize the machining features of the 3D CAD model that are influencing the increase in manufacturing costs. The proposed process consists of (1) data collection and pre-processing, (2) 3D deep learning architecture exploration, and (3) visualization to explain the prediction results. The proposed deep learning model shows high predictability of manufacturing cost for the computer numerical control (CNC) machined parts. In particular, using 3D gradient-weighted class activation mapping proves that the proposed model not only can detect the CNC machining features but also can differentiate the machining difficulty for the same feature. Using the proposed process, we can provide a design guidance to engineering designers in reducing manufacturing costs during the conceptual design phase. We can also provide real-time quotations and redesign proposals to online manufacturing platform customers.