Surface modification vertical device and method based on ultrasonic rolling technology

A surface modification and ultrasonic rolling technology, applied in the field of surface modification vertical devices, can solve the problems of difficult to achieve surface modification treatment of flat parts, machine rigidity and precision damage, and small depth of plastic deformation layer.

Inactive Publication Date: 2021-07-06
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, both of these two processes have certain limitations. For example, the rolling technology requires a certain pressure to strengthen the surface of the workpiece. This pressure is about 1000~3000N, which will damage the rigidity and precision of the machine tool; shot peening After the surface of the workpiece is relatively rough, the depth of the formed plastic deformation layer is small
In addition, the existing ultrasonic rolling equipment is mostly used for the processing of rotating parts, and it is difficult to realize the surface modification treatment of planar parts

Method used

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  • Surface modification vertical device and method based on ultrasonic rolling technology
  • Surface modification vertical device and method based on ultrasonic rolling technology
  • Surface modification vertical device and method based on ultrasonic rolling technology

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Experimental program
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Embodiment 1

[0030] Embodiment 1: as Figure 1~2 As shown, in this embodiment, a surface modification vertical device based on ultrasonic rolling technology is provided, including a vertical machining center machine tool, an ultrasonic actuator 2, an ultrasonic generator 3 and an air compressor 8, and the ultrasonic The generator is connected to the ultrasonic actuator through the cable to provide energy for the processing system, and the air compressor is connected to the ultrasonic actuator through the pipeline to provide the initial static pressure and can be adjusted through the pressure gauge;

[0031] The ultrasonic actuator includes an ultrasonic transducer 4, a horn 5 and a tool head 9 installed on the main shaft 1 of the vertical machining center from top to bottom.

[0032] The above-mentioned ultrasonic transducer is used to convert the high-frequency AC signal into mechanical vibration of the same frequency; the above-mentioned horn is used to amplify the mechanical vibration o...

Embodiment 2

[0048] Embodiment 2: Cut a section of metal sample with the method of wire cutting, observe its surface topography under electron microscope and measure surface roughness Ra, its surface microscopic topography is as follows image 3 As shown, before ultrasonic rolling treatment, the workpiece surface has dense processing marks, many defects, extremely uneven, and high surface roughness; after ultrasonic rolling treatment, such as Figure 4 As shown, the surface of the workpiece becomes continuous, flat and uniform, and the surface roughness is greatly reduced. At the same time, if Figure 5 As shown, the metallographic structure of its surface is observed under an optical microscope, and its microstructure; as Image 6 As shown, the surface structure of the metal sample after the ultrasonic rolling treatment is significantly refined, the original coarse grains are transformed into tiny particles, the originally clearly visible grain boundaries are destroyed or even hidden, and ...

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Abstract

The invention provides a surface modification vertical device and method based on an ultrasonic rolling technology. The surface modification vertical device comprises a vertical machining center machine tool, an ultrasonic executing mechanism, an ultrasonic generator and an air compressor, wherein the ultrasonic generator is connected to the ultrasonic executing mechanism through a cable, and is used for providing energy for a machining system, the air compressor is connected to the ultrasonic executing mechanism through a pipeline and used for providing initial static pressure and adjusting the initial static pressure through a pressure gauge, and the ultrasonic executing mechanism comprises an ultrasonic transducer, an amplitude-change pole and a tool head which are installed on a machine tool spindle of the vertical machining center from top to bottom. The device is reasonable in design, ultrahigh-frequency mechanical vibration is generated through the ultrasonic executing mechanism, the ultrahigh-frequency mechanical vibration is coupled with a static load provided by the air compressor to jointly act on the tool head, the the ultrasonic executing mechanism is driven by the machine tool spindle of the vertical machining center to make contact with the surface of a workpiece and make transverse reciprocating motion, so that the surface roughness of the workpiece can be effectively reduced, the surface grain structure is refined, and the surface integrity of the workpiece is improved.

Description

technical field [0001] The invention relates to a surface modification vertical device and method based on ultrasonic rolling technology. Background technique [0002] The wear, corrosion and fatigue fracture of mechanical parts often originate from the surface of the material. The performance and durability of the parts depend largely on the surface integrity of the material. Therefore, the improvement of the surface integrity of the material is the key to the life extension of the material. content and core technology. As a new green surface modification technology, ultrasonic rolling can significantly reduce the surface roughness of the workpiece, increase the microhardness and introduce deep residual compressive stress, which has great potential in improving the surface integrity of materials. However, at present, the existing deformation strengthening technologies for improving the surface integrity of metal materials mainly include rolling and shot peening. However, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D7/04C22F1/00
CPCC21D7/04C22F1/00
Inventor 林有希李光晖蔡建国郑开魁
Owner FUZHOU UNIV
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