A method for planning transition profile in cam grinding

Abstract

The invention discloses a planning method of a transition silhouette through cam grinding. Based on the non-circular layered repeated grinding principle, a transient grinding amount is determined by a transient grinding contacting area and the tangential speed of a tangency point, and when the grinding amount is controlled only by adjusting the rotation speed, the unnecessary influences of acceleration and deceleration on the speed of a linkage shaft are caused. Therefore, a layered repeated grinding mode of a cam is analyzed through the planning method of the transition silhouette through cam grinding, the transient grinding contacting area is jointly determined by a target silhouette and a silhouette formed by a previous layer of grinding, the target silhouette serves a starting point, middle transition silhouettes of layered repeated grinding are sequentially planned point by point according to requirements of the grinding contacting area, and a technological base is provided for controlling the transient grinding amount through double control means of the grinding contacting area and the rotation speed.

Description

Technical field [0001] The invention relates to a transition profile planning method for cam grinding processing, which belongs to the technical field of grinding processing. Background technique [0002] The existing cam non-circular grinding mostly adopts the tangent normal tracking grinding technology. During the forming process, the rotary headstock or C-axis drives the workpiece to rotate. The grinding wheel frame of the grinder is the X-axis follow-up tracking. Circular grinding. [0003] Since the instantaneous grinding amount is related to the pole diameter, the radius of curvature and the rate of change of each point of the cam profile, and the following error of the linkage axis, when the planned grinding thickness of each point is constant, no matter if the constant angular velocity control or the constant linear velocity control method is used Grinding, the instantaneous removal of the surface of the workpiece to be ground will change greatly, resulting in fluctuations...

AI Technical Summary

Problems solved by technology

[0003] Since the instantaneous removal amount is related to the polar diameter, curvature radius and its rate of change of each point of the cam profile, and the following error of the linkage axis, when the planned removal thickness of each point is constant, no matter whether the method of constant angular velocity control or constant linear velocity control is adopted Grinding, the instantaneous grinding removal amount on the surface of the ground workpiece will change greatly, resulting in fluctuations in grinding force, causing nonlinear elastic deformation of the process system, and constant linear speed control will lead to excessive speed of the linkage shaft and acceleration fluctuations, which have a great impact on the machining accuracy and surface quality of the workpiece

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