A metal material surface strengthening method and its strengthening device
A technology of surface strengthening and metal materials, applied in the field of metal material surface strengthening methods and strengthening devices, can solve the problems of small residual compressive stress, limited strengthening effect, small surface compressive stress of materials, etc., and achieve the effect of simple structure
Active Publication Date: 2021-05-11
JILIN UNIV
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Problems solved by technology
[0006] Second, the compressive stress value on the surface of the material is small, and the strengthening effect is limited
Due to the insufficient plastic deformation of the surface layer, the residual compressive stress value on the surface of the material is small, which limits the effect of the residual compressive stress on crack suppression, and the initiation and propagation of cracks in the material mostly occur on the surface or sub-surface, so it will cause the material on the surface. Short fatigue life under working load and unsatisfactory strengthening effect
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[0016] In order to better understand the technical solution of the present invention, the following will be further described in conjunction with the embodiments in the accompanying drawings:
[0017] Such as figure 1 As shown, the strengthening device of the present invention includes a base 1, an oblique pin 2, an elastic body 3, a spring 4, a cylindrical positioning pin 5, a force applying body 6, and the like. The base 1 of the strengthening device of the present invention is firmly connected with a hammer or an air punch through a positioning hole. The oblique pin 2 runs through the elastic body 3 , and the hemispherical oblique pin 2 at both ends is respectively connected with the hemispherical recesses of the base 1 and the force applying body 6 . The fit between the cylindrical positioning pin 5 and the hole of the base 1 is an interference fit, and a gap of 3-4mm is reserved between the cylindrical positioning pin 5 and the force applying body 6; Force spring 4; the...
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The application belongs to the technical field of metal material surface strengthening, and in particular relates to a metal material surface strengthening method. Through the simultaneous action of the hammer force in the vertical direction on the surface of the metal material and the friction force in several directions on the tangent plane, a large residual compressive stress layer is generated on the surface of the material, delaying the generation and expansion of cracks under the working load of the material, Improve the fatigue life of the material. In addition, based on the above strengthening method, it relates to a metal material surface strengthening device, including an elastic body, a force applying body, a base, and an oblique pin. The hammering force causes the compression deformation of the elastic body, which is driven by the compression deformation of the elastic body through the oblique pin, and converted into the external thrust of multiple force application blocks. The above strengthening method is realized through the simultaneous action of the friction force between the force applying block and the material to be strengthened, and the impact force of the force applying block on the workpiece surface in the vertical direction.
Description
technical field [0001] The invention belongs to the technical field of metal material surface strengthening, and in particular relates to a metal material surface strengthening method and a strengthening device thereof. Background technique [0002] With the continuous development of industrial technology, the requirements for the safety, reliability and service life of metal materials in practical applications are getting higher and higher. Especially in major fields related to national security and development, such as aviation, aerospace, navigation, petrochemical, electric power, etc., the performance requirements for key components are becoming more and more stringent. [0003] Usually, in order to increase the service life of these parts and prolong the service life, after the parts are formed, they need to be strengthened. In practical applications, since the failure of materials mostly occurs on the surface or subsurface, surface strengthening has become a key proce...
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IPC IPC(8): C21D7/06
CPCC21D7/06
Inventor 严庆光千承辉
Owner JILIN UNIV