tailieunhanh - Machining and Monitoring Strategies Part 11

Tham khảo tài liệu 'machining and monitoring strategies part 11', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Machining and Monitoring Strategies 531 precise machine tool Fig. 257a and hoping to utilise it to machine when approaching nano-metric resolution levels. There are many often interrelated factors that have to be considered and then dealt with if one is to successfully operate at this ultra-precision level of machining operations. Machine Tool Monitoring Techniques Introduction One of the most fundamental requirements for increasing productivity of CNC machine tools is the ability to operate them ideally in an untended manner but at the very least minimally-manned - whether they are stand-alone machines or part of a flexible manufacturing cell or system FMC S . So if an untended operation has been decided upon then the absence of an operator will create a considerable number of problems that must be overcome if the machining operations are to be satisfactory. These problems arise in performing the monitoring and service functions that are usually seen by the operator who would normally undertake the monitoring of the cutting tool s condition and its performance replacing worn or defective tooling by interrupting the cutting cycle assessing the workpiece quality during machining changing speeds and feeds - if required plus responding to unusual conditions that are either seen or heard during the cutting operation. While in an unmanned machining environment the associated monitoring systems must provide the artificial intelligence AI necessary to mirror the experience gained by a fully-skilled operator and their instinctive reactions and to provide the type of expertise usually associated with human involvement. To cope with these every-day humanintelligence activities and their subsequent intervention during any machining operations a considerable number of monitoring systems have been developed. In general monitoring systems can be classified as process-monitoring workpiece-monitoring machine tool monitoring and tool-monitoring systems. Typical applications of