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System and method for automatic control over laser shock peening

A laser shock strengthening and automatic control technology, applied in the field of laser strengthening treatment of metal surfaces, can solve the problems of incomplete process research and technical standards, inability to reasonably control laser process parameters, and low ability of automatic production, so as to improve the resistance to foreign body damage. ability, avoid major failures, and realize the effect of digitization

Inactive Publication Date: 2016-03-09
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the current research on laser shock strengthening only stays at the theoretical level, it is difficult to apply it reasonably in industrial production, the ability of automatic production is low, and it is impossible to carry out digital reasonable control of laser process parameters, related process research and technical standards not perfect
Therefore, improving the efficiency of laser shock peening equipment and reducing the cost of laser shock peening has become a technological gap that limits the development of laser shock peening technology.

Method used

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  • System and method for automatic control over laser shock peening
  • System and method for automatic control over laser shock peening

Examples

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Embodiment 1

[0044] Laser shock strengthening of the overall blisk of the aero-engine to improve the fatigue performance and the ability to resist foreign object damage, such as Figure 7 As shown, firstly, the mechanical analysis software Abaqus7.0 is used to analyze the fatigue performance of the overall blade disk of the aero-engine, and the laser shock strengthening performance index, initial conditions, boundary conditions, material properties and material process parameters are input, and the distributed C / S mode SQLServer background database, build residual stress distribution model, and then import it into structural mechanics CAE analysis software, according to force analysis results and performance requirements, automatically generate laser shock wave pressure and processing trajectory on the surface of metal sheet. According to the calculated shock wave pressure, the industrial computer system automatically selects and optimizes the process parameters of the laser through the fu...

Embodiment 2

[0046] Laser shock strengthening is carried out on the anode tungsten alloy of the short-arc mercury lamp to increase its surface hardness to prolong its service life. First, import the anode tungsten alloy size drawing into the Abaqus7.0 mechanical analysis software, and then analyze the stress on the anode tungsten alloy. , set the laser shock strengthening performance index, initial conditions, boundary conditions, material properties and material process parameters, and call the SQLServer background database with distributed C / S mode to build the corresponding relationship model between surface hardness and impact times, and import it into the structure Mechanics CAE analysis software generates motion trajectory. According to force analysis results and performance requirements, CAE software automatically plans the laser shock wave pressure and processing motion trajectory on the surface of the metal sheet. According to the calculated shock wave pressure, the industrial comp...

Embodiment 3

[0048]Laser shock strengthening is carried out on the helicopter titanium-aluminum alloy hub to increase its surface hardness to prolong its service life. First, import the anode tungsten alloy dimension drawing into the Abaqus7.0 mechanical analysis software, and then carry out force testing on this type of cast titanium-aluminum alloy Analyze the situation, set the laser shock strengthening performance index, initial conditions, boundary conditions, material properties and material process parameters, including the phase transition point of 1250 ℃, yield strength of 520MPa, specific strength of 1020K, crystal structure of body-centered cubic and body-centered tetragonal , and adjust the SQLServer background database to build a model of the relationship between surface residual stress and impact times, import it into structural mechanics CAE analysis software, and generate motion trajectories. According to the force analysis results and performance requirements, the CAE softwar...

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Abstract

The invention relates to a method for automatic control over laser shock peening. The method comprises the following steps that a part analysis model is built in mechanical analysis software according to the machining requirement, and residual stress distribution is obtained; residual stress distribution is guided into CAE analysis software, and a machining motion track acting on the surface of a part is automatically generated; meanwhile, technological parameters corresponding to a laser shock wave pressure set value are selected by an industrial personal computer according to the relation between laser shock wave pressure and laser peening technological parameters; the machining motion track and the technological parameters are guided into the mechanical analysis software for simulation so as to obtain a strain value after machining simulation; and if the strain value is within the set range, the technological parameters are sent to a laser device through the industrial personal computer, the machining motion track is sent to a robot, and automatic laser machining is achieved. By means of the method, laser shock peening of an integral blade disc can be achieved, quantitative precise control over residual stress is achieved, the service life of the integral blade disc is effectively prolonged, and the foreign matter damage resisting capacity of the integral blade disc is effectively improved.

Description

technical field [0001] The invention belongs to the field of metal surface laser strengthening treatment, in particular to an automatic control system and method suitable for laser shock strengthening of complicated metal parts. Background technique [0002] As a new type of metal surface strengthening technology, laser shock peening has broad application prospects in many technical fields. This technology can effectively improve the fatigue resistance, wear resistance and corrosion resistance of metal materials. Compared with the existing metal material surface strengthening methods such as cold extrusion and shot peening, this technology has non-contact, no heat-affected zone, The outstanding advantages of strong controllability, remarkable strengthening effect, high degree of automation, green and non-pollution have received extensive attention and research since the day it was produced. [0003] Domestic research on laser shock strengthening technology began in the earl...

Claims

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Application Information

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IPC IPC(8): C21D10/00
Inventor 赵吉宾乔红超陆莹
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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