Linear bearing common metamorphic layer

So-called linear bearing refers to a kind of linear motion system, used for straight line travel used with cylindrical shaft. The linear bearing grinding is required in the production process, linear bearing during grinding, the workpiece surface layer will be grinding wheel cutting force, compression force and friction force. And, in particular, the role of the latter two, make the workpiece surface layer formed directional strong plastic deformation and strain hardening layer. The metamorphic layer is bound to affect the surface residual stress changes. China bearing network according to understand tell everyone linear bearing common metamorphic layer has the following kinds: 1, soften the metamorphic layer ( Work hardening layer) Sometimes use micro hardness and metallographic method can be found that caused by the machining deformation of surface hardness. In addition to grinding machining, casting and heat treatment heating caused by the surface decarburized layer, if again later processing has not been completely removed, residual on the workpiece surface will cause surface softening metamorphism, contributed to the early failure of linear bearing. 2, thermoplastic deformation ( Or high temperature deformation) Layer of grinding heat in the transient temperature of the work surface formation, makes a certain depth of the workpiece surface layer elastic limit fell sharply, even to the point of elastic disappear. The work surface on the grinding force, especially under the action of compression force and friction force, caused by free stretch, subject to the conditions of the matrix metal, the surface is compressed ( More plough) , cause the plastic deformation in the surface layer. High temperature plastic deformation under the condition of the grinding process is constant, with the temperature increasing of workpiece surface. 3, cold plastic deformation layer in the process of grinding, every moment of abrasive is equivalent to a cutting edge. But in many cases, the rake Angle of cutting edge negative, in addition to abrasive cutting action, is to make the workpiece surface under compression ( The plough) That left obvious plastic deformation of workpiece surface layer. The deformation layer deformation degree as the degree of grinding wheel dull increases and grinding feed. 【 Warm prompt. 【 The bearing network] Some information from the Internet, and strive to secure timely, accurate, aims to deliver more information, does not represent our views to its approval or responsibility for their authenticity. If this net reprint information involves the issues such as copyright, please contact with this net. Tel: 0571 - 81630205. Tags: production and processing