Variable heat source model-based non-circular-profile workpiece high-speed grinding temperature prediction method

Abstract

The invention discloses a variable heat source model-based non-circular-profile workpiece high-speed grinding temperature prediction method. The method comprises the steps of collecting the power andtemperature data of a non-circular-profile workpiece during the high-speed grinding process; establishing a variable heat source distribution model for non-circular-profile grinding; based on the variable heat source distribution model and the non-circular curved-surface grinding heat source loading method, carrying out temperature finite element simulation on the non-circular-profile workpiece during the high-speed grinding process; based on a heat distribution ratio calculation method for the surface temperature of the workpiece, correcting the heat flux density. According to the invention,aiming at the high-speed grinding process of the non-circular-profile workpiece, the variable heat source distribution model and the heat distribution ratio calculation method for non-circular-profilegrinding are established, and a heat source loading method suitable for non-circular contour grinding temperature simulation is provided. The heat source loading problem for the non-circular curved surface is solved. Meanwhile, the temperature field of each grinding arc zone during the high-speed grinding process of the non-circular contour workpiece can be accurately predicted. Compared with theprior art, the method is simple to operate, strong in applicability and high in accuracy.

Description

technical field [0001] The invention relates to a method for predicting the high-speed grinding temperature of a non-circular profile workpiece based on a variable heat source model. Background technique [0002] As the key components of internal combustion engines and engines, non-circular workpieces have been widely used in the fields of ships and automobiles. The machining accuracy, surface quality, and degree of burn directly determine the working quality and efficiency of the engine. During the high-speed grinding of non-circular contour workpieces, a large amount of heat is often generated, most of which enter the workpiece and the grinding wheel in the form of heat energy, resulting in a sharp rise in the local temperature in the grinding arc area, which greatly affects the surface integrity of non-circular contour workpieces And its performance, and even cause thermal damage on the ground surface (including surface burns, cracks, residual stress, etc.), which will le...

AI Technical Summary

Problems solved by technology

During the high-speed grinding process of non-circular contour workpieces, a large amount of heat is often generated, most of which enter the workpiece and the grinding wheel in the form of heat energy, resulting in a sharp rise in the local temperature in the grinding arc area, which greatly affects the surface integrity of non-circular contour workpieces And its performance, and even cause thermal damage on the ground surface (including surface burns, cracks, residual stress, etc.), which will lead to the reduction of wear resistance and fatigue resistance of non-circular workpieces, affecting its reliability and service life

[0003] Due to the complex contour shape of workpieces with non-circular contours, the contact length and material removal rate change rapidly and the contact points constantly move during grinding. The existing research on grinding heat mainly focuses on surface grinding and cylindrical grinding, while The research on the grinding heat of non-circular contours is not deep enough, and the original basic grinding model of grinding chip thickness, grinding energy and temperature is not suitable for high-speed grinding of non-circular contours

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