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Device and method for achieving laser high-cavitation-strengthening efficiency

A laser and high-efficiency technology, applied in laser welding equipment, welding equipment, metal processing equipment, etc., to achieve the effect of improving efficiency, improving processing efficiency, and high utilization rate

Inactive Publication Date: 2015-07-01
JIANGSU UNIV
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  • Application Information

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Problems solved by technology

However, in the actual strengthening process, the efficiency of laser high cavitation strengthening is not very ideal. Realizing the efficiency of laser high cavitation strengthening through liquid temperature control and height control has great significance in the field of laser strengthening, and the current methods and devices in this regard Relevant literature and patents have not been retrieved

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  • Device and method for achieving laser high-cavitation-strengthening efficiency

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Embodiment

[0023] Install the workpiece Cu target on the clamping device, adjust the laser to focus on the upper side of the Cu target surface, and the process parameters of the pulsed Nd:YAG laser are: output wavelength 1.06 μm, pulse width 10 ns. Fill water into the water tank 3 through the liquid pump 13. From the time when the pure water in the water tank 3 overflows the surface of the workpiece, as the liquid height increases, the loss of water to the energy of the laser beam is also increasing. First, add the liquid height in the water tank to 200mm, and then gradually reduce the liquid height. It is found that when the liquid height reaches about 100mm, the high-efficiency strengthening effect of laser cavitation on the target is the best. Ensure that the height of the pure water in the tank remains constant, starting from room temperature, and heating the pure water to 70°C. Experiments have proved that when the temperature of the liquid is low, the strengthening effect on the ta...

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Abstract

The invention discloses a device and method for achieving laser high-cavitation-strengthening efficiency. The device comprises a water tank. The bottom of the water tank is provided with a clamping device and a workpiece arranged on the clamping device. The two sides of the workpiece are provided with temperature sensors. The wall face of the water tank is provided with a liquid level sensor and a resistance heater. A laser cavitation system is arranged above the water tank. The laser cavitation system is connected with a computer. The temperature sensors, the liquid level sensor and the resistance heater are connected with the computer through a data processing device. The computer controls the resistance heater to heat liquid to change the physical property of the liquid and controls the height of the liquid in the water tank by adjusting the delivery capacity of a liquid pump, so that high-efficiency avitation and strengthening of the material surface performance are achieved. According to the device and method, high-efficiency cavitation and strengthening of materials are achieved by adjusting the liquid temperature and the liquid height.

Description

technical field [0001] The invention relates to a device and method for realizing high cavitation strengthening efficiency of laser, which is used for realizing high cavitation strengthening efficiency of laser on workpiece surface and improving the performance of workpiece material. Background technique [0002] When the laser is focused in the liquid, the liquid medium will be broken down, and at the same time, a plasma cavity will be formed in the breakdown area, and the plasma will continue to absorb the energy of the laser, and it will expand rapidly to form a cavity. As the pressure in the focal region rises sharply, the cavity expands. Cavitation is a complex hydrodynamic phenomenon. When it collapses, it will generate a strong high pressure in a very short time, accompanied by a micro jet with a speed of 100m / s. [0003] As early as 1897, S.W.Barnaby&C.A.Parsons proposed the concept of "cavitation", and pointed out that cavitation may occur when there is high-speed ...

Claims

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Application Information

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IPC IPC(8): B23K26/352
CPCB23K26/352
Inventor 任旭东何浩袁寿其佟艳群吴坤卢加兴左成亚王德顺周睿王杰
Owner JIANGSU UNIV
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