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Method for laser-assisted ultrasonic rolling for surface modification

A technology of ultrasonic rolling and surface modification, applied in metal processing and other directions, can solve the problems of energy loss, expensive lubrication costs, workpiece deformation, etc., to achieve stable residual compressive stress, avoid large-area heating, and deep surface nanometerization.

Inactive Publication Date: 2019-01-08
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, high temperature and extensive heating can lead to deformation / oxidation of workpieces, shortened service life and expensive lubrication costs
Furthermore, it is very difficult and energy-consuming to heat large workpieces during the required manufacturing process

Method used

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  • Method for laser-assisted ultrasonic rolling for surface modification
  • Method for laser-assisted ultrasonic rolling for surface modification
  • Method for laser-assisted ultrasonic rolling for surface modification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 As shown, the metal workpiece is fixed on the workbench with a fixture, and the ultrasonic rolling device is used, and the above-mentioned ultrasonic rolling process parameters are used to perform ultrasonic rolling treatment on the surface of the workpiece. Figure 4 The pre-planned path is shown to complete the surface modification of the workpiece.

Embodiment 2

[0030] Such as figure 2 As shown, the metal workpiece is fixed on the workbench with fixtures and located in the heating device, the heating device is heated to 507.31 ° C, and kept at this temperature, and then the ultrasonic rolling device is used, and the above ultrasonic rolling process parameters are adopted. Ultrasonic rolling treatment is carried out on the surface of the workpiece, along the Figure 4 The pre-planned path is shown to complete the surface modification of the workpiece.

Embodiment 3

[0032] Technical scheme of the present invention, such as image 3 As shown, 1) fix the metal workpiece on the workbench with a fixture; 2) first use continuous laser beam to locally heat the surface of the metal workpiece to the dynamic recrystallization temperature of the metal workpiece 507.31 °C; 3) immediately use ultrasonic roller The pressing device uses the above-mentioned ultrasonic rolling process parameters to perform ultrasonic rolling treatment on the same position. In order to ensure simultaneous laser heating and ultrasonic rolling at the same position, the light outlet of the laser is connected to the ultrasonic unit. The two parts move together; 4) adopt the same operation steps, along such as Figure 4 The pre-planned path is shown to complete the surface modification of the workpiece.

[0033] Figure 5 It is the result schematic diagram after processing of three embodiments. It can be seen that the metal workpiece processed by laser-assisted ultrasonic r...

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Abstract

The invention relates to the field of ultrasonic rolling machining, and specifically relates to a method for laser-assisted ultrasonic rolling for surface modification. The method comprises the following steps: carrying out local heating on the surface of a metal workpiece by virtue of a continuous laser beam to reach a dynamic recrystallization temperature of the metal workpiece at first; and then immediately carrying out ultrasonic rolling treatment on the same position by virtue of an ultrasonic rolling device, and completing the surface modification for the workpiece along a previously-planned path and through the same operation step.

Description

technical field [0001] The invention relates to the field of ultrasonic rolling processing, in particular to a method for surface modification of laser-assisted ultrasonic rolling. Background technique [0002] Most fatigue failures of metal workpieces originate from the surface of the workpiece, which makes it particularly important to improve the mechanical properties of metal workpieces by inducing plastic deformation in the near-surface region. Ultrasonic Surface Rolling (Ultrasonic Surface Rolling) uses the combination of ultrasonic impact energy and static load rolling to perform high-speed impact treatment on the surface of metal parts, causing large plastic deformation of the surface material of the parts, and forming beneficial residual compressive stress after unloading , thereby strengthening the machined surface. [0003] In addition to processing technology, the effectiveness of inducing deeper plastic deformation layers also depends on the plasticity of the me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P9/04B23P25/00C21D10/00
CPCB23P9/04B23P25/006C21D10/005
Inventor 鲁金忠吴刘军卢海飞罗开玉
Owner JIANGSU UNIV
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