| ZHENG Chenxi,CHEN Shuning,ZHANG Xinlong.Research Progress of Theory and Technology in Abrasive Flow Machining[J],53(17):17-40, 111 |
| Research Progress of Theory and Technology in Abrasive Flow Machining |
| Received:November 03, 2023 Revised:January 18, 2024 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2024.17.002 |
| KeyWord:abrasive flow machining process parameters surface roughness material removal rate mechanical properties processing accuracy |
| Author | Institution |
| ZHENG Chenxi |
Northeast Forestry University, Harbin , China |
| CHEN Shuning |
Heilongjiang University of Science and Technology, Harbin , China |
| ZHANG Xinlong |
Northeast Forestry University, Harbin , China |
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| Abstract: |
| This paper was based on a brief explanation of material removal mechanisms of extrusion abrasive flow machining technology, abrasive water jet polishing technology, and soft abrasive flow machining technology. The research progress of abrasive flow machining methods was introduced. The effects of key process parameters such as abrasive type (abrasive hardness), concentration, mesh size, abrasive viscosity and viscosity-temperature characteristics, extrusion pressure, media flow speed, number of cycles, workpiece material hardness, water jet pressure, impingement angles, standoff distance, standoff distance on the material removal rate (material removal) and the surface roughness (surface roughness variation) of the workpieces during the polishing process of the above three abrasive flow finishing technologies were summarized. Technical problems of machining uniformity, mechanical properties, and machining accuracy in the application of abrasive flow were analyzed. At the same time, for the technical problems mentioned, not only relevant experimental research was explored, but also a composite process combining abrasive flow machining technology and hydro-mechanical shaping technology for tubes was proposed. The AlSi10Mg tube formed by SLM (selective laser melting) were selected as the research object in the process. The process relied on the turbulent wall effect produced by soft abrasive to carry out reciprocating erosion micro-cutting, which could remove the defect layer caused by the step effect, balling effect and powder adhesion. Meanwhile, with internal pressure loaded continually, when the tube was in the hydro-mechanical shaping stage, its outer contour was completely shaped and fitted to the expected die cavity under the combined action of the clamping force generated by the mold and the normal pressure generated by the support internal pressure. After treatment of hydro-mechanical shaping, the internal porosity and cracks in the tube were repaired and healed, and the original residual tensile stress on the surface was also transformed into residual compressive stress. Therefore, this composite process could enhance the integral mechanical properties and improve the machining accuracy without destroying the thin wall shape of the tube, so as to provide an effective method for achieving the low carbon manufacturing goal of short process, low emissions, and low cost of additive manufacturing parts. Finally, the specific applications of abrasive flow machining technology in additive manufacturing parts, micro structure parts and complex structure parts were summarized, and the development direction of abrasive flow machining was prospected from the perspectives of deepening the systematic research of material removal mechanism, carrying out the basic research of process parameters, exploring the composite technology of abrasive flow machining and expanding the application field of abrasive flow machining. |
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