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Pulse current assisted ultrasonic rolling surface strengthening device and method

A technology of ultrasonic rolling and pulse current, which is applied in the field of surface treatment of metal materials, can solve the problems of not being able to reach deeper into the material, difficult to strengthen the surface layer, and high hardness of the surface layer, and achieve low cost, superior comprehensive performance, and simple device structure. Effect

Inactive Publication Date: 2021-04-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for some materials with high hardness or difficult to process, the surface layer has high hardness and low plasticity. It is difficult to produce sufficient plastic deformation on the surface layer by ultrasonic rolling, and it is also difficult to obtain a better strengthened surface layer. Simply adjusting the ultrasonic rolling process parameter method to improve its surface performance is very difficult
In addition, during ultrasonic rolling, the hardened surface layer produced by the previous ultrasonic rolling will become an obstacle to plastic deformation during the next ultrasonic rolling, so that the subsequent ultrasonic rolling cannot reach deeper into the material

Method used

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  • Pulse current assisted ultrasonic rolling surface strengthening device and method
  • Pulse current assisted ultrasonic rolling surface strengthening device and method
  • Pulse current assisted ultrasonic rolling surface strengthening device and method

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Effect test

Embodiment 1

[0044] Such as figure 1 As shown, this embodiment provides a pulse current assisted ultrasonic rolling surface strengthening device, which is implemented on a lathe, including a pulse power supply 1, conductive parts, clamping mechanism 2 and ultrasonic rolling module, only shown in the figure The lathe tailstock 3 of the lathe is shown, and other parts of the lathe are not shown.

[0045] The clamping mechanism 2 is used to clamp the workpiece 4, and the clamping mechanism 2 is driven to rotate by the lathe, wherein the workpiece 4 is a metal material, such as figure 1 and figure 2 As shown, the clamping mechanism 2 includes a first chuck 201, a second chuck 202 and a third chuck 203, the second chuck 202 is a cylindrical shank chuck, the third chuck 203 is a conical shank chuck, and the first chuck 202 is a cylindrical handle chuck. Chuck 201 can be the chuck that lathe itself has, and first chuck 201 is connected with lathe main shaft, and second chuck 202 is installed o...

Embodiment 2

[0068] The main features of this embodiment are: using an AC pulse welding machine, or using a pulse welding machine with the function of outputting AC pulse current, or using an AC welding machine, and using AC pulses or AC current to process workpieces. All the other are with embodiment 1.

Embodiment 3

[0070] The main features of this embodiment are: use a DC pulse welding machine, or use a pulse welding machine with the function of outputting DC pulse current, or use a DC welding machine, and use DC pulse current or DC current to process the workpiece. All the other are with embodiment 1.

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Abstract

The invention discloses a pulse current assisted ultrasonic rolling surface strengthening device and method. The device comprises a pulse power supply, a conductive part, a clamping mechanism and an ultrasonic rolling module, the clamping mechanism is used for clamping a workpiece, the clamping mechanism is driven by a lathe to rotate, the conductive part is in contact with the clamping mechanism, the pulse power supply is connected with the conductive part and used for applying pulse current to the workpiece, and the ultrasonic rolling module is used for conducting pulse current assisted ultrasonic rolling surface strengthening treatment on the surface of the workpiece. According to the pulse current assisted ultrasonic rolling surface strengthening device and the method, the electroplastic effect, the skin effect and the heat effect of pulse current are compounded with severe plastic deformation caused by ultrasonic rolling, so that the strengthened surface layer is thicker, the surface layer performance is better, the surface strengthening effect of the metal material can be improved, the surface appearance of the metal material is better, and the performance of the metal material is improved.

Description

technical field [0001] The invention relates to a pulse current-assisted ultrasonic rolling surface strengthening device and method, belonging to the technical field of metal material surface treatment. Background technique [0002] With the development of aerospace, heavy equipment, transportation, chemical equipment, light industrial equipment, medical equipment, shipbuilding industry, marine engineering equipment and other industries, many mechanical equipment work under harsh conditions, requiring parts to be wear-resistant Good comprehensive properties such as corrosion resistance and fatigue resistance make the equipment run safely and reliably. [0003] Ultrasonic rolling surface strengthening technology is a surface modification and surface strengthening technology. The ultrasonic rolling tool squeezes the surface of the workpiece with a certain pressure, and at the same time the tool impacts the surface of the workpiece with a certain frequency, causing severe plast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D7/04C21D10/00C22F1/00C22F3/00
CPCC21D7/04C21D10/00C22F1/00C22F3/00
Inventor 屈盛官任朝军贾思钰胡雄风李小强
Owner SOUTH CHINA UNIV OF TECH
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