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Inprocess Quality Control through Propotionate Valve in Electrical Upsetting of Engine Valves
Abstract:
In regular electrical upsetting process, the process parameters were determined by the experience. During working, these parameters were constant and could not be controlled online. In this paper a new proportionate valve and various velocity top anvils, electrical upsetting system is introduced. Based on the bulb temperature measured at the time of operation proportionate valve will vary the upset pressure to obtain the bulb without crack or fold. The control strategy includes two key parts: sensing the temperature and controlling it by varying the power intensity in the circuit through controlling the upset pressure. And the different anvil position and anvil velocity will be used to change the bulb shape based on the valve profile. This control strategy also includes two key parts: Velocity of anvil is directly proportional to height of bulb, in various positions various velocity will be used to form a different shape of bulb without defects.
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Pages:
2665-2670
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Online since:
July 2014
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© 2014 Trans Tech Publications Ltd. All Rights Reserved
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