Precise Prediction Method of Grinding Force Considering Kinematic Parameters in Screw Grinding Process

Abstract

The invention discloses a method for accurately predicting grinding force by considering motion parameters in a screw grinding process. The method comprises the following steps of calculating the length of a contact line of a grinding wheel and a screw in the grinding process; by utilizing a vector product definition, determining a grinding area according to the calculated length of the contact line and a contact arc length at a contact point; calculating grinding force of a grinding region of the grinding wheel; and comprehensively obtaining the grinding force of the grinding region of the grinding wheel. According to the method for calculating the grinding force in the screw grinding process, by calculating the length of the contact line in the grinding process and the grinding area actually participating in grinding, the grinding force of the grinding region of the grinding wheel can be accurately calculated; and the method can provide required theoretical bases for screw grinder design, grinding power prediction and the like.

Description

technical field [0001] The invention relates to the field of screw grinding processing, in particular to a method for accurately predicting grinding force considering motion parameters in the screw grinding process. Background technique [0002] Grinding force is an extremely important parameter in the grinding process. It not only affects system deformation, grinding efficiency, machining accuracy, surface quality, grinding wheel durability, grinding heat, grinding vibration, but also the ultra-precision grinding One of the parameters that need to be focused on when designing a machine tool. Due to the complex motion relationship between the grinding wheel and the workpiece in the grinding process of the screw, in the prior art, the cutting force of the screw is usually calculated using empirical formulas, and the contact line between the grinding wheel and the screw needs to be obtained before calculation using the formula At present, the meshing principle is generally us...

AI Technical Summary

Problems solved by technology

Since the principle of gear meshing is to use the method of analytical geometry to establish the supplementary conditional expression of the screw and the tool through the common normal of the screw and the tool, in order to achieve the purpose of solving the contact line and forming the tooth profile of the tool, this requires the screw tooth profile curve in any There is a continuous first-order derivative at each point, and in the actual design process, the tooth profile curve of the screw end surface is generally composed of two or more different types of curves, and the connection between the curve and the curve can only be guaranteed The continuity of the curve cannot guarantee the continuity of the first-order derivative of the curve at the connection point, which makes the contact line and tool tooth profile curve obtained by using the meshing principle fluctuate obviously, which affects the accurate solution of the contact line length

Images