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摘要
The paper presents portable measuring & control systems, designed and built by the authors, and their application to the analysis of two industrial processes: the precision hot forging of CV universal joint casings in closed dies in the crank press (GKN Driveline Olesnica) and the forging of concrete slab carrying handles in a TR device in the eccentric press (INOP Poznan). The systems enable the measurement, archiving and analysis of forging force-time/displacement traces correlated with tool temperature, as well as the measurement of production speed and the quantity of produced forgings. Recently an acoustic emission (AE) signal registration capacity has been incorporated into the system to investigate the changes occurring during the forging process, especially progressive tool wear. The information obtained in this way is to be used to improve the operating conditions of the forging presses and to optimize the whole forging process by means of CAD/CAM/CAE software based on FEM. The measuring & control systems consist of an industrial computer (comprising a real-time controller, a multi-speed measurement card, RAM memory, large capacity hard disks and a set of amplifiers and transducers) and sensors (force, displacement, pyrometers, thermocouples, linear and angular encoders, accelerometers and AE). Two applications (based on LabView) have been developed for each of the systems. One of the applications is installed on the industrial computer and is used to control the system as well as to record and process the voltage signals received from the individual sensors. The other application enables the analysis of the processed signals.
- 出版日期2011
