Fluid magnetic abrasive hole finishing processing device

Abstract

The invention discloses a fluid magnetic abrasive hole finishing processing device. The device comprises a driving cylinder and a storage cylinder which are connected into a whole through a middle connecting cover, a front end cover is arranged at the upper end of the driving cylinder, a rear end cover is arranged at the lower end of the storage cylinder, a driving cylinder piston is arranged in the driving cylinder, the lower end of the driving cylinder piston is connected with a piston rod, the other end of the piston rod penetrates the middle connecting cover to extend into the storage cylinder and is provided with a storage cylinder piston, and an oil return port communicating with the inside of the driving cylinder is arranged on a driving cylinder shell and adjacent to the middle connecting cover. After a magnetic field is applied, viscosity is increased rapidly under the action of the external magnetic field, so that grinding media with certain shear yield stress are formed along the hole wall surfaces, further processing such as finishing, grinding and deburring of inner walls of various holes is achieved, and surface adaptability and universality are high.

Description

technical field [0001] The invention relates to the field of finishing processing of mechanical products, in particular to a device for finishing holes of liquid magnetic abrasive tools. Background technique [0002] As a common processing feature, holes (including ordinary holes, small holes, shoulder holes, cross holes, special-shaped holes, etc.) Among the components of a product, its surface quality has a very important impact on the performance, life, reliability, and stability of the entire product. With the development of modern high-speed and high-precision equipment, higher and higher requirements are placed on the surface quality of parts. Improving and improving the surface quality of parts has become an important factor for improving product performance, improving product reliability and prolonging product life. One of the ways, but the precise finishing of small holes (mainly referring to the hole diameter less than 5mm), shoulder holes, cross holes, special-sh...

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Problems solved by technology

[0003] Taking electrochemical polishing with strong shape adaptability as an example, this method can only process conductive materials, and has strict requirements on electrodes. For holes with a diameter of less than 5mm, electrodes are difficult to manufacture, difficult to place, and even impossible to process.

Extrusion honing (also known as abrasive flow processing) processing technology is more suitable for hole processing. It uses the viscoelastic matrix medium (grinding medium) carrying abrasives to make the abrasive particles in the abrasives move repeatedly on the processed surface under a certain pressure. Cutting action is produced to achieve smooth processing, but because the abrasive used in extrusion honing has a certain viscosity, it is difficult to clean when processing small holes. When the hole diameter is less than 2mm, the small hole may be blocked, resulting in inability to process; in addition, extrusion honing Pressure honing is processed by expanding the abrasive under high pressure, so when processing some thin-walled holes, workpiece deformation will occur

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