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Inner surface polishing device of large-length-diameter-ratio slender pipe and method thereof

A polishing device and a technology with a large length-to-diameter ratio, which is applied in the direction of grinding the workpiece support, can solve the problems of heat generation and low grinding efficiency, and achieve the effect of increasing the magnetic induction intensity and improving the grinding efficiency

Inactive Publication Date: 2017-07-11
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because there is no auxiliary polishing device in the lumen of this device, the actual number of magnetic abrasive particles involved in the processing is low, and the grinding efficiency is not high. Moreover, after the coil is energized, the heat is severe, and a corresponding heat dissipation device is required, otherwise there will be safety hazards

Method used

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  • Inner surface polishing device of large-length-diameter-ratio slender pipe and method thereof
  • Inner surface polishing device of large-length-diameter-ratio slender pipe and method thereof
  • Inner surface polishing device of large-length-diameter-ratio slender pipe and method thereof

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Embodiment 1

[0041] Example 1, the elongated tube 3 with a surface roughness value of about 2.2 μm is ground with the device and method of the present invention. Before grinding, the inner surface of the elongated tube 3 has obvious pits, protrusions and obvious Machining textures with large peaks and troughs in the surface roughness profile (e.g. Figure 5In a), during the grinding process, the magnetic abrasive particles 8 will scratch the inner surface of the cutting workpiece, and will impact the inner surface of the workpiece with high-frequency vibration. This process is similar to mechanical shot peening, and the addition of vibration makes the magnetic abrasive particles The tumbling and renewal functions of 8 are enhanced, and the magnetic abrasive particles 8 fully participate in the grinding, and the surface morphology of the processed workpiece is more fine and uniform, and the surface roughness value at this time can reach 0.15 μm (such as Figure 5 shown in middle b); the ori...

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Abstract

The invention belongs to the technical field of magnetic grinding, and in particular, relates to an inner surface polishing device of a large-length-diameter-ratio slender pipe and a method thereof. The polishing device is characterized by comprising a machine tool body, a moving mechanism arranged on the machine tool body, a workpiece clamping mechanism arranged on the machine tool body and a grinding mechanism arranged on the machine tool body; the grinding mechanism includes an ultrasonic generator and a magnetic grinding device; and the magnetic grinding device includes an external grinding device and an internal grinding device. The polishing device adds ultrasonic vibration into the traditional magnetic grinding process, so that magnetic grinding particles generate a high-frequency impact effect on the inner surface of the slender pipe; an auxiliary magnetic pole is added in an inner cavity of the slender pipe for forming a magnetic loop with an external magnetic pole, so that the magnetic induction strength of unit space is improved, and the grinding pressure is also increased; and the material removing quantity is 1.5 times of that in traditional magnetic grinding.

Description

technical field [0001] The invention belongs to the technical field of magnetic grinding, and in particular relates to a polishing device and a method for polishing the inner surface of a slender tube with a large aspect ratio. Background technique [0002] The piping system composed of various alloy pipes is the lifeline of equipment and is widely used in aerospace, petrochemical and machinery manufacturing and other fields. The quality of the inner surface of the pipe will directly affect the service life of the equipment. Restricted by the use environment, many pipes are thin-walled and slender pipes with relatively large length and diameter (inner diameter is 2mm-6mm). It is difficult for ordinary tools to enter during processing and cannot be observed with the naked eye. Traditional polishing methods are difficult to complete. Using the magnetic grinding method can overcome the limitations brought by the traditional method, and can perform ultra-precision polishing on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B1/00B24B1/04B24B41/06
CPCB24B1/005B24B1/04B24B41/06
Inventor 杨海吉韩冰康璐刘永健金文博李阔
Owner UNIV OF SCI & TECH LIAONING
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