Y. Rong

Computer‐aided fixture design verification

Computer‐aided fixture design (CAFD) techniques have been advanced so rapidly that computers can now generate fixture configurations automatically, for both modular fixtures and dedicated fixtures. Computer‐aided fixture design verification (CAFDV) is the techniques for verifying and improving existing fixture designs. It verifies the followings: geometric constraining ability, achieved tolerance, fixturing stability, and fixturing accessibility. Two models – one geometric and one kinematic – are created for the verification.

Computer-Aided Fixture Design Verification. Part 1. The Framework and Modelling

Computer-aided fixture design (CAFD) techniques have been advanced rapidly so that fixture configurations can be generated automatically, for both modular fixtures and dedicated fixtures. Computer-aided fixture design verification (CAFDV) is the technique for verifying and improving existing fixture designs. In this paper, the framework of CAFDV is introduced based on two models, i.e., geometric and kinematic models. The fixturing tolerance and stability verification will be presented in separate papers.

Analysis of temperature field of milling insert with 3D complex groove using Cellular Automata

A numerical method for modelling the temperature field of milling insert with 3D complex groove is proposed based on the self-organising Cellular Automata. The self-organising local rule of Cellular Automata is derived to describe the heat transfer that affects temperature of milling insert using the finite difference theory. Consequently, a Cellular Automata model is built to predict the dynamic temperature field of the milling insert with 3D complex groove, which is also called wave-edge insert. Case studies are performed using sets of selected cutting conditions. Corresponding milling experiments and finite element analysis are also conducted to verify the simulation results of the Cellular Automata method. The comparison shows the validity and advantages of the proposed method.

Computer-Aided Fixture Design Verification: Part II — Tolerance Analysis

Tolerance analysis is the most important issue in computer-aided fixture design (CAFD) since the primary task of fixturing is to ensure the quality of machining, and it is an important part in computer-aided fixture design verification (CAFDV). This study presents a new approach for fixture tolerance analysis that is more generalized and can be used to assign locator tolerances based on machining surface tolerance requirements. The tolerance analysis is also generalized to handle any type of fixture designs, workpieces, datum features, and machining feature tolerances. Locator tolerance assignment distributes tolerances to locators based on a sensitivity analysis.Copyright