Development and distinctions of application of electrohydraulic effect for forming of high-precision large-dimensional sheet articles
DOI:
https://doi.org/10.37142/2076-2151/2023-1(52)107Keywords:
electrical discharge in liquid, control of energy flows, impulse loading, electrodes, sheet blank, forming.Abstract
Taranenko M., Naryzhnyi O. Development and distinctions of application of electrohydraulic effect for forming of high-precision large-dimensional sheet articles.
Low efficiency of application of conventional schemes of electrohydraulic forming at manufacturing of large-dimensional sheet articles is mentioned. It is suggested to use multi-electrode discharge blocks for manufacturing of mentioned articles at prototype production. Conclusion about their potential efficiency and distinctions of the process that make forming to be more difficult is done. Main reasons of such difficulties are considered. These difficulties are the following: poor controllability of energy flows in space and sharp falling of loading parameters after several hundreds of EH-discharges. Main tasks of the study are grounding of possibility of loading spatial control in frames of technological space and increasing resistance of operational electrodes that withstand high mechanical loading and electric erosion.
Experimental perfectioning of elements of technological equipment for electrohydraulic press allowed to increase duration between overhauls up to one month that is quite satisfactory for research manufacturing.
At high intensity of equipment maintenance one can use press with two sets of multi-electrode discharge blocks, i.e. the first one is in use, the second one is under repairing
It is shown by means of mathematical modelling that the process of energy transfer from electrical current generator to object of processing has jet character. This gives possibility to control energy flow in space of technological block. Possibility of further increasing efficiency of forming and operational characteristics of equipment is shown practically on examples. Results obtained are proved by experimental way.
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