Abrasive Jet System Research Articles

The study on optimization of characteristic parameters of electromagnetic abrasive jet pressurize

In view of the poor continuity of the pre-mixed abrasive jet equipment and the non-uniform mixing of the abrasive particles in the post-mixed abrasive jet system, this thesis is based on electromagnetic abrasive slurry jet technology. The affecting factors of jet compression characteristics of electromagnetic abrasive slurry are studied through the combination of numerical simulation analysis and experimental research. According to previous research results, the influence of two parameters of magnetic flux density and voltage on the outlet velocity and kinetic energy of conductive medium are predicted through numerical simulation. Combined with orthogonal test characteristics, we set up a test platform and carry out some experiments. The experimental results show that the biggest influence on jet supercharging characteristics is magnetic flux density and the next one is the voltage. The results of numerical simulation are verified. When the flux density is 0.7T, the voltage is 72V, the concentration of conductive medium is 18% and the characteristics of jet pressurize are best.

Abrasive jet system and its various applications in abrasive jet machining, erosion testing, shot-peening, and fast cleaning

Abrasive jet system is one of the effective tools and found several present and future applications in many manufacturing industries and R&D sectors. In the form of abrasive jet it is used for machining like cutting, drilling, and engraving of brittle materials. Surface fast cleaning and preparation are done by using abrasive jet for welding and plasma spray coatings. The erosion tests of turbine blades, propellers are done by using abrasive jet application. Some special type of particles are used for shot peening for surface hardening. An abrasive jet system is in-house designed and manufactured and its performance is observed in various applications like machining, cleaning, and erosion tests. In this present research work, a critical review has been done on various applications of abrasive jet systems. Based on the present status of work, the application possibilities of the present abrasive jet system is experimentally evaluated. It is evident that the abrasive jet system using natural sand can be used for cutting, drilling and engraving of brittle material like glass, marble, etc. Rust cleaning from the metal surface and erosion tests of metal matrix composite laser coatings are also performed by using the same abrasive jet system.

Study on erosion wear of steels under varying abrasive jet

Erosion is one of the frequently occurring wear of aerospace, power plant, surface vehicles and ship components. Wear is detrimental that reduces service life of the engineering components. An abrasive jet system can provide the means of erosion by supplying high velocity abrasive jet towards the materials from which components are made. On way of investigating the sustainability of engineering materials against erosion, mild steel and austenitic stainless steel had been being targeted by an abrasive jet by varying different process parameters. The rate of erosion of mild steel and austenitic stainless steel was measured under various process conditions. The effect of different process parameters on crater depth was also investigated

A Study on Speed of Fluid in Swirling Abrasive Jet Nozzle and Drilling Hole Performance

By placing the whirling element in the nozzle body, swirling abrasive jet has been produced. The speed function of spiral groove and swirling contraction segment in inner of nozzle are analyzed. And the formulas of speed function are obtained. It is seen that movement of fluid in the spiral groove is regarded as spiral one-dimension axial symmetry, movement of fluid in the swirling contraction as spiral two-dimension axial symmetry. The swirling abrasive jet system has been established. The production method and the drilling test system of the swirling abrasive jet are introduced. The drilling mechanism of the swirling abrasive jet is analyzed. Through experiment, the effects of the whirling element structure and the jet parameters on drilling performance are studied. The results indicated that in the case of nozzle non-rotation, under the working pressure of 10 MPa, swirling abrasive jet can drill a deep hole on coal block of which Polodyakonov coefficient f is about 4, and that the diameter of the hole is 20~30 times the size of the nozzle exit diameter. So the swirling abrasive jet has a good drilling performance.