Extrusion honing: also known as abrasive flow processin […]
Extrusion honing: also known as abrasive flow processing. This process method uses a semi-solid abrasive abrasive. Under the action of the extrusion honing machine, the abrasive reciprocates on the surface of the machined part, and affects various parts. A new type of process for grinding and polishing the cavity, cross-aperture and edges, and deburring the round corners.
Due to the rapid development of science and technology, this technology has been applied in aerospace technology and weapons industry, and also expanded to textile, medical, sewing, precision gears, bearings, mould manufacturing and other machinery industries.
As the process performance requirements of precision mechanical parts such as aerospace missiles, electronics, computers, etc. continue to increase, there are high requirements for the surface roughness, chamfering and edge purification of the inner holes of the parts. At present, manual, mechanical, chemical, etc. The method has its limitations in polishing, chamfering and deburring the surface of the part. In particular, polishing, chamfering and deburring the intersecting apertures and edges of the small apertures in the part is powerless (because the tool is not effective).
Extrusion honing technology has the function of grinding and polishing the holes and cavities of hidden parts, as well as chamfering round corners. It also has the ability to grind and polish various complex profiles on the outer surface. It has functions that other methods cannot do, so it is called "exotic process" ". Extrusion honing uses abrasives of different particle sizes and viscosities. Under the action of squeezing force, selecting appropriate process parameters can increase the surface roughness of parts by 2-3 levels after honing for 3-5 minutes on the basis of the original surface roughness. The highest roughness can reach 0.05, and the precision can be controlled at the micron level.
Extrusion honing can not only grind and polish the surface of parts, chamfer round corners, but also grind and polish the cavity surfaces of various moulds such as extrusion dies, wire drawing dies, and cold punch dies.
The advanced extrusion honing technology has the incomparable advantages of other processing methods. It has strong adaptability. Due to the different extrusion forces, different abrasive grain sizes and different hardnesses, it not only grinds and polishes the finished surface of the part, but also can Grinding and polishing of rough surfaces such as precision casting, deburring of chamfered corners, surface grinding and polishing of quenched and non-quenched parts of metals and non-ferrous metals, deburring of chamfered corners, and polishing of non-metallic materials.
This processing method can process one or several parts within 3-5 minutes, and the maximum shift can reach hundreds of pieces. It is not only suitable for single piece production but also for mass production.