Low-temperature assisted ultrasonic surface rolling intensifying device and processing method
A technology of ultrasonic rolling and surface strengthening, which is applied in the field of surface rolling strengthening devices, low temperature assisted ultrasonic surface rolling strengthening devices and processing fields, can solve the problems of limited surface properties of materials, and achieve high hardness, good wear resistance and resistance Fatigue properties, effects of large plastic deformation
Inactive Publication Date: 2016-08-10
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
However, only the surface strengthening treatment can improve the performance of the surface layer of the material is still relatively limited.
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[0039] Taking the cast Ti-6Al-4V alloy rod as the processing object, the surface properties of the material were strengthened by using a low-temperature assisted ultrasonic surface rolling device.
[0040] After Ti-6Al-4V rods are subjected to low-temperature assisted ultrasonic surface rolling treatment, a thicker surface modification layer can be obtained, and the mechanical properties have been greatly improved. The specific parameters are as follows: the workpiece length is 150mm, the radius is 50mm, the spindle speed is 56rpm, the axial feed rate is 0.05mm / rev, the heating temperature is 100°C, the holding time is half an hour, and the lubricating medium is high temperature resistant lubricating oil , the load of ultrasonic rolling is 600N, the direction of rolling is unidirectional, and the same section of material is rolled twice. The whole operation process is realized on the horizontal machine tool.
[0041] image 3 is a scanning electron image of a cross-section of ...
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Abstract
The invention discloses a low-temperature assisted ultrasonic surface rolling intensifying device and a processing method. The device consists of a surface rolling member, a loading member and a heating member, wherein a clamping handle is arranged on the surface rolling member; the loading member is arranged at the tail end of the surface rolling member; a spring, a pressure sensor, a baffle, a transducer and an amplitude-change pole are sequentially arranged on the end face of the loading member; the amplitude-change pole is provided with a rolling head of which the front end is provided with a roller through a guide sleeve; the outer side of the surface rolling member is connected with an ultrasonic generator; and the heating member is provided with a temperature controller and heating wires connected and controlled by the temperature controller According to the processing method disclosed by the invention, an ultrasonic rolling technology and low-temperature heating treatment are combined; on the basis of softening materials by using low temperature heating, an ultrasonic frequency electrical signal is converted into ultrasonic mechanical vibration by using the transducer; and after the ultrasonic mechanical vibration is amplified by the amplitude-change pole, vibration with a certain amplitude is outputted and transmitted to the rolling head, and high-speed vibration between the rolling head and workpieces in the rolling process is realized, thereby better refining material grains on the surface layers of the workpieces, and generating greater residual compressive stress and high surface hardness.
Description
technical field [0001] The invention belongs to the technical field of surface processing, and relates to a surface rolling strengthening device, in particular to a low-temperature assisted ultrasonic surface rolling strengthening device and a processing method. Background technique [0002] As one of the surface strengthening technologies, ultrasonic surface rolling can effectively reduce the surface roughness of the material, increase the surface microhardness of the material, generate residual compressive stress, and change the microstructure of the surface layer of the material; thus, it can be effectively Improve the wear resistance and fatigue resistance of materials. However, only the surface strengthening treatment can improve the performance of the surface layer of the material is still relatively limited. At present, both at home and abroad are paying more attention to how to combine surface strengthening treatment technology with other surface modification techno...
Claims
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IPC IPC(8): C21D7/04C22F1/18
CPCC21D7/04C22F1/18
Inventor 屈盛官李刚潘玉祥李小强
Owner SOUTH CHINA UNIV OF TECH
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