Water nozzle for high-speed cam grinder

Abstract

The invention relates to a water nozzle for a high-speed cam grinder, aims to prevent grinding burn and cracks during grinding of cams with great cam profile curvature radiuses, particularly concave cams with the high-speed cam grinder, and belongs to the technical field of camshafts. The water nozzle is mainly characterized by consisting of a water nozzle body and a cover plate fixed on the side face of the water nozzle body through a screw, wherein a spray nozzle part is a flat nozzle; the inclination angle alpha of the spray nozzle is 10-30 degrees; the width W of the section of the spray nozzle is 0.8-1.2 millimeters. By adopting the water nozzle, the problem that high-speed air current is brought into a grinding region by a high-speed grinding wheel is solved, and the cooling effect during grinding with the high-speed grinding wheel is enhanced; during grinding of the cams with great cam profile curvature radiuses, particularly concave cams, a remarkable cooling effect is achieved, cooling liquid jet flow can be accelerated by using the high-speed grinding wheel, and the requirement on the water pump lift is low. The water nozzle is simple in structure, has very high practicability, and contributes improvement on the quality and prevention of burn and cracks during grinding of the cams with great cam profile curvature radiuses or concave cams.

Description

technical field [0001] The invention relates to a high-speed cam grinding nozzle, which is suitable for high-speed cam grinding to prevent grinding burns and cracks when the curvature radius of a cam profile is large, especially a concave cam, and belongs to the technical field of camshafts. Background technique [0002] When the cam grinds the cam, it is necessary to spray coolant to the grinding area to cool the high temperature generated by the grinding. High-speed cam grinding generally uses CBN grinding wheels, and the linear speed reaches more than 90m / s, which will drive a layer of high-speed airflow on the surface of the grinding wheel into the grinding area. Compared with coolant, high-speed airflow is easier to enter the narrow grinding area, resulting in insufficient cooling. . When the grinding radius of curvature is large, especially when the concave cam is used, the contact arc between the grinding wheel and the cam is very long, the position of the grinding p...

AI Technical Summary

Problems solved by technology

Existing water nozzles for spraying coolant are all designed as straight nozzles, spraying directly to the grinding area, the jet is tangent to the outer circle of the grinding wheel, the high-speed airflow and the coolant jet enter the grinding area at the same time, the contact arc length of the coolant jet and the grinding wheel is Very short, it is difficult to adapt to grinding cams with a large radius of curvature, especially concave cams. At the same time, the coolant jet has no effect of being accelerated by the high-speed grinding wheel. In order to prevent grinding burns or cracks, it is necessary to configure a high-pressure water pump. speed

Images