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A circulating static pressure magnetorheological polishing device

The technology of magnetorheological polishing and excitation device is applied in the field of magnetorheological polishing, which can solve the problems of large volume and polishing of the inner wall of extremely thin pipes, and achieve the effect of reducing the volume, realizing the polishing operation, and reducing the generation of heat.

Active Publication Date: 2019-12-10
NORTHEASTERN UNIV LIAONING
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  • Claims
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Problems solved by technology

[0009] In order to solve the technical problem that the existing magnetorheological polishing device is too large to complete the polishing operation on the inner wall of the ultra-fine pipe, the present invention provides a circulating static pressure magnetorheological polishing device

Method used

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  • A circulating static pressure magnetorheological polishing device
  • A circulating static pressure magnetorheological polishing device

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Embodiment Construction

[0030] In order to better explain the present invention and facilitate understanding, the present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0031] The invention provides a circulating static pressure magnetorheological polishing device, which utilizes the principle that the solidification degree of the magnetorheological fluid is affected by the magnetic field intensity within a certain range of magnetic field intensity to perform polishing. Under the action of a magnetic field, the magnetorheological fluid is in a semi-solid state, and the yield stress increases significantly, and within a certain range, the yield stress increases with the increase of the magnetic field intensity.

[0032] Such as figure 1 As shown, with the U-shaped iron core 1 as the base, the excitation coil 6 is wound on both sides of the U-shaped iron core 1, and the two ends of the opening of the U-shaped iron core are fixed...

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Abstract

The invention discloses a circulating current static pressure type magneto-rheological polishing device. The polishing device comprises an excitation device, magneto-rheological fluid and a polishinghead. The polishing head is internally provided with a cavity. Holes are distributed in the circumferential direction of the polishing head. The surface of the polishing head is provided with tiny pits. The polishing head is mounted at the center position of the inner wall of a workpiece. The workpiece is mounted in a magnetic field generated by the excitation device. The excitation device comprises permanent magnets and an electromagnet. The intensity of the magnetic field can be controlled by controlling the magnitude of current of the excitation device, and then the curing degree of the magneto-rheological fluid between the polishing head and the inner wall of the workpiece is controlled so that materials on the surface the workpiece can be cut and removed during relative motion of thepolishing head and the workpiece. The circulating current static pressure type magneto-rheological polishing device is simple in structure, small in size and high in controllability. Under the rotation action of the workpiece, the magneto-rheological fluid flows out from the three rectangular holes in the polishing head to apply pressure to the surface of the workpiece uniformly. Isostatic pressure can be realized in the workpiece. The circulating current static pressure type magneto-rheological polishing device completes polishing treatment on the surface of the workpiece through relative motion of the polishing head and the workpiece.

Description

technical field [0001] The invention relates to the field of magnetorheological polishing, in particular to a circulating static pressure magnetorheological polishing device which can be used for processing the inner surface of a slender non-magnetic tube. Background technique [0002] Magnetorheological polishing technology is an ultra-precision machining method that utilizes the rheological properties of magnetorheological fluid in a magnetic field for polishing. Magnetorheological fluid is mainly a suspension composed of tiny soft magnetic particles with high magnetic permeability and low hysteresis and non-magnetic liquid. It has the characteristics of magnetic properties, rheology and stability. [0003] Magneto-rheological polishing technology is the rapid relative movement between the flexible "small grinding head" with viscoplastic behavior formed by the flow of magnetorheological fluid in the gradient magnetic field and the workpiece, so that the surface of the wor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24B1/00
CPCB24B1/005
Inventor 宋万里李红亮牛天荧石沛王娜
Owner NORTHEASTERN UNIV LIAONING
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