Instrumentation and Computer Interface Design for Forward Extrusion Tool

摘要

This paper describes the instrumentation and computer interface design for an extrusion tool to monitor certainprocess parameters during forward cold extrusion. A load sensing component, i.e. load cell was designed and manufacturedto measure the extrusion forces. The load cell consisted of an individual component within a die set mounted in a200-tonne hydraulic press, designed to study forward extrusion of aluminum alloys. The extrusion load measurement isbased upon a number of strain gauges bonded to the central section of the component. The extrusion force was transmittedthrough a pressure plate to the load sensing component. A linear variable differential transformer (LVDT) was used toprovide an output on the punch linear travel during the extrusion process. Both the load cell and the LVDT were calibratedand a complete programme of cold extrusion of aluminum was carried out to validate the setup. The extrusionprocess was monitored using personal computer (PC) running LabVIEW softwar.