Turning inserts the selection approach based on fuzzy comprehensive evaluation

Abstract

Tool selection is a multi-criteria decision-making problem in the presence of various selection criteria and a set of alternatives, but previous works are limited to evaluating the tools within the workshop tool library. To intelligently select proper inserts across suppliers under the Internet environment, an insert data format based on ISO 513 was established, and a framework was then designed to obtain a set of alternatives from different suppliers based on fuzzy intervals. Then, knowledge was described with convenient language and the simple membership function to build an intelligent system, which would infer the matching degree of insert characteristics to the machining conditions. Furthermore, analytic hierarchy process was applied to sort the alternatives. Finally, the case study shows that compared with previous works and machinists, this work not only obtains a set of alternatives from all suppliers who uploaded their product data with the designed format but comprehensively evaluates the insert (take finishing low-carbon steel as an example, both cemented carbide and cermet are recommended, the nose radius reduces 25%, the environmental index increases 25%, while the rake reduces 11.25%, when compared with machinists who tend to select the larger rake angle foe finishing). A platform was also developed based on Visual Studio 2015 and SQL Server 2012 to improve selection efficiency for inexperienced CNC operators, purchasers, and vendors.

Case Retrieval Strategy of Turning Process Based on Grey Relational Analysis

“…How to achieve metal cutting in a low-cost and high-efficiency way has always been the purpose of machinists, many attempts have been done to improve the cutting efficiency or reduce cost. These include 1) Modifying the cutting item material, such as improvement of tool substrate material [1], coating [2] or both [3]; 2) Optimizing machining processes, such as proper selection of tools [4], development of novel special inserts [5][6][7], and optimization of cutting parameters [8,9]. Among them, improving tool materials and developing novel inserts are not time-saving and cost-friendly, due to the requirement of the complex preparation process and expensive equipment.…”