Affiliation:
1. Northwestern Polytechnical University
Abstract
Many process parameters are involved during the fabrication of Csf/Mg composites using
extrusion directly following vacuum infiltration. The selection of suitable process parameters is
important for the successful fabrication of composites. This will require a continuous monitoring and
collecting system of process parameters. This paper describes how this is performed. The monitoring
and collecting system is developed to monitor and control the forming process successfully. The
hardware was built with data acquisition (DAQ) card based on PCI and various sensors for
temperature, pressure, displacement. The industrial computer is used to process the data collected
from the sensors. The data acquisition card is the bridge between the computer and sensors. In order to
reduce the signal noise from sensors, the hardware filter circuit is designed. The data acquisition card
can not work by connecting the computer and sensors through it simply. It must be operated through
the self-developed software. The data colletcing software is developed in this paper. It can realize the
parameter monitoring and collecting easily by setting up the hardware through the user friendly
interface. The curves of parameters can be displayed on the computer screen and the data can be saved
into the database for post-processing. The software also supplies the warning function. When the
parameters (for example the temperature of mold) arrives the set value, the computer can sound a note
of warning to tell the worker to operate the press. It is demonstrated that the main parameters, such as
temperature of mold and liquid metal, the loaded pressure and the displacement of punch, can be
monitored and collected in real-time by use of this system. This paper found the base for the further
selection of optimized process parameters.
Publisher
Trans Tech Publications, Ltd.
Subject
Condensed Matter Physics,General Materials Science,Atomic and Molecular Physics, and Optics
Cited by
3 articles.
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