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Magneto-rheological polishing device and method based on flow field focusing

A magnetorheological polishing and flow field technology, which is used in grinding/polishing equipment, parts of grinding machine tools, metal processing equipment, etc. It can solve the problem that the polishing head cannot be rotated axially, cannot form a gradient magnetic field, and affect the machined surface. Quality and polishing efficiency and other issues, to achieve high-efficiency polishing, improve polishing effect, and avoid the effect of deviation

Active Publication Date: 2019-10-18
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the size of the magnetic tube is small, an effective gradient magnetic field cannot be formed, and the polishing head cannot rotate axially, which affects the quality of the processed surface and the polishing efficiency

Method used

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  • Magneto-rheological polishing device and method based on flow field focusing
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  • Magneto-rheological polishing device and method based on flow field focusing

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Embodiment Construction

[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0037]like figure 1 As shown, the embodiment of the present invention provides a magneto-rheological polishing device based on flow field focusing, which includes an end cover 1, a sleeve 2, a polishing head housing 3 and a magnetic isolation shaft 4, wherein the end cover 1 and the polishing head The shell 3 is divided into two ends of the sleeve 2 (such as figure 1 The upper and lower ends o...

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Abstract

The invention belongs to the field of polishing of ultra-precision optical elements, and in particular discloses a magneto-rheological polishing device and method based on flow field focusing. The magneto-rheological polishing device comprises an end cover, a sleeve, a polishing head shell and a magnetic isolating rotation shaft, wherein the end cover and the polishing head shell are connected with the two ends of the sleeve, and a liquid inlet and a liquid outlet are formed in the polishing head shell; the magnetic isolating rotation shaft is arranged in the sleeve, one end of the magnetic isolating rotation shaft penetrates through the end cover to be connected with an external rotating power source, and the other end of the magnetic isolating rotation shaft is inlaid with a permanent magnet and is inserted into the polishing head shell to form a flow focusing chamber with the inner part of the polishing head shell; and the liquid outlet is positioned directly below the permanent magnet. During polishing, one part of magneto-rheological polishing fluid forms a bingham body under the action of permanent magnet at the end face of the magnetic isolating rotation shaft; and the otherpart of the magneto-rheological polishing fluid flows in the flow focusing chamber and is ejected from the liquid outlet, and the part generates hydrodynamic pressure to extrude the bingham body forshaping during flowing, so that a small bingham body polishing head with the average diameter less than the diameter of the liquid outlet is formed. The magneto-rheological polishing device and methodrealize efficient polishing of workpieces with different surface shapes.

Description

technical field [0001] The invention belongs to the field of ultra-precision optical element polishing, and more specifically relates to a magnetorheological polishing device and method based on flow field focusing. Background technique [0002] Ultra-precision optical components are widely used in military, aerospace, astronomy, nuclear energy and important economic industries. These components have high requirements for surface quality and surface accuracy. As a non-contact polishing technology, magnetorheological polishing uses the rapid relative movement between the flexible polishing mold with viscoplastic behavior formed by the flow of magnetorheological polishing fluid in the gradient magnetic field and the workpiece, resulting in microcutting. Function to realize non-contact polishing of components. The shape and hardness of the polishing mold of this polishing technology are completely controlled by the magnetic field, and the polishing mold is continuously updated...

Claims

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Application Information

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IPC IPC(8): B24B1/00B24B41/04
CPCB24B1/005B24B41/04
Inventor 肖峻峰牛牧原王强许剑锋罗优明刘祥吴佳理
Owner HUAZHONG UNIV OF SCI & TECH
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