Abstract
On the basis of the pulse-pressure model of the velocity-induced de-formation of metal pipes proposed by the authors [1] the expanding plas-ma channel of an electric spark, the influence of the collision angle and the contact point speed on the quality of welding of pipes with a tube grid of a heat exchanger were investigated. An algorithm for estimating welding zones is proposed. The applicability of the algorithm is tested on pairs of pipe made of alloy AD1 + tube made of alloy AMg6.
Highlights
To create and maintain temperature conditions at technological installations of energy facilities and other industries it is necessary to supply or remove of thermal energy from the working environment
The main disadvantage of pipe mounting in tube lattice by the method of expansion is a violation of the density of the connection during transportation, installation and operation
With the help of high-speed shadow photo-recording of tube deformation by the pulse pressure of an expanding electric-spark plasma channel, the strain kinetics of metal pipes was experimentally investigated
Summary
To create and maintain temperature conditions at technological installations of energy facilities and other industries it is necessary to supply or remove of thermal energy from the working environment. The main disadvantage of pipe mounting in tube lattice by the method of expansion is a violation of the density of the connection during transportation, installation and operation Failures for this reason in the initial period are 30%. Fastening pipes in grid of pipes of heat exchangers using a technology based on the use of a pulsed pressure source, for example, an expanding plasma channel initiated by an electrical conductor explosion (EСЕ) [5, 6], is a good solution to a complex technological operation. The purpose of this work is to develop an algorithm for estimating the parameters of the high-speed collision of metal pipes by the pulse pressure of an expanding electric spark plasma channel and determining the dimensions of the connections line which has a welding zone. The welding zone is the border of collision, in which solid-phase welding is formed due to the joint elastoplastic deformation of the contact volumes of the welded materials [9]
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