Space complex curved surface grinding temperature numerical simulation analysis method

Abstract

The invention discloses a space complex curved surface grinding temperature numerical simulation analysis method. The method comprises the following steps that S1, according to a unit normal vector and a normal curvature of a curved surface of a workpiece to be machined, two main curvatures of any certain point on the curved surface and two main directions corresponding to the two main curvaturesrespectively are calculated; S2, calculating the long axis, the short axis and the area of the instantaneous contact ellipse of the workpiece to be machined and the grinding wheel according to the main curvature, the corresponding main direction and the first grinding process parameters; S3, determining a grinding mode, and calculating the grinding heat flux density according to the representationcoefficient of the grinding mode, the inherent characteristic parameters of the workpiece material, the area of the instantaneous contact ellipse and the second grinding parameters; S4, obtaining thegrinding temperature through calculation according to the grinding heat flow density. According to the method, the three-dimensional simulation analysis model of the curved surface grinding process parameters and temperature based on the elliptic model is established, and the three-dimensional simulation analysis of the grinding temperature in the part grinding process with the spatial complex curved surface characteristics is realized.

Description

technical field [0001] The invention belongs to the technical field of engineering, and more specifically relates to a numerical simulation analysis method for grinding temperature of complex curved surfaces in space. Background technique [0002] Grinding has the characteristics of high unit grinding force and fast grinding line speed, and the energy in the process is almost completely converted into heat energy. The distribution of grinding temperature in grinding process has a very significant impact on the thermal damage and surface integrity of the workpiece. Therefore, it is particularly important to analyze the distribution of grinding temperature through numerical simulation in grinding process. [0003] The numerical simulation analysis model of grinding temperature achieved phased results as early as the 1950s. The classic numerical simulation analysis of grinding temperature is based on the rectangular heat source theory or triangular heat source theory, combined...

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Problems solved by technology

[0005] Aiming at at least one defect or improvement requirement of the prior art, the present invention provides a numerical simulation analysis method for the grinding temperature of complex curved surfaces in space. Combining with the theory of spatial contact, the relationship between process parameters and temperature of complex curved surfaces in space based on the ellipse model is established. The three-dimensional numerical simulation analysis model solves the problem of large errors in the one-dimensional and two-dimensional grinding temperature numerical simulation analysis, realizes the three-dimensional numerical simulation analysis of the grinding temperature in the grinding process of parts with space complex surface features, and The correction coefficient of numerical simulation calculation of grinding temperature is introduced, which improves the accuracy of numerical simulation analysis of grinding temperature

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