Finishing method for abrasive wheel for grinding electro-hydraulic servo valve tube spring thin wall

Abstract

The invention discloses a finishing method for a grinding wheel used for grinding a thin wall of a tubular spring of an electrohydraulic servo valve, which adopts a finishing tool consisting of an idler wheel with a surrounding groove and a mandrel which installs the idler wheel on an excircle grinder; the finishing method for the grinding wheel includes the following steps: the finishing tool and the grinding wheel to be finished are respectively arranged on the head frame and the main shaft of the excircle grinder first; solid finishing is carried out; then smoothness finishing is carried out. The finishing tool of the finishing method for the grinding wheel used for grinding the thin wall of the tubular spring of the electrohydraulic servo valve of the invention has the advantages of simple structure, being convenient for atuomation, high efficiency and low cost. The finishing method leads the finished thin wall of the tubular spring processed by the grinding wheel to have uniform thickness, high glossiness, smooth and accurate circular bead connection location and good consistency, which greatly improves the processing efficiency and reduce the requirements of the technical level of workers.

Description

technical field [0001] The invention relates to a dressing tool and a dressing method of a grinding wheel, in particular to a dressing method of a grinding wheel used for grinding thin-walled springs of electro-hydraulic servo valve tubes. Background technique [0002] The development of electro-hydraulic servo valves in the international professional field has gone through more than 50 years, and the application occasions are becoming more and more extensive. The electro-hydraulic servo valve is a high-precision, highly dynamic electro-hydraulic servo control element used in the electro-hydraulic control system, which can be used in the hydraulic control system of precise displacement, speed, force and acceleration. Tube spring 1 (such as figure 1 (shown) is the key important part in the electro-hydraulic servo valve of the nozzle baffle. It has the characteristics of small size, high precision in size and shape and position tolerance. It is an elastic element, and the thi...

AI Technical Summary

Problems solved by technology

Although the cost of this dressing method is relatively low, it has high requirements on the operator, low dressing efficiency, and poor consistency. The trimmed grinding wheel often produces vibration scales when grinding the thin wall of the tube spring, which affects product quality.

2) Use the modified universal grinding wheel dresser, because the general grinding wheel dresser is used for tool grinders, surface grinders, forming grinders, etc., and the high-precision universal cylindrical grinder cannot be used due to structural problems. The modification cost of the trimmer is high, the construction period is long, and the precision requirement is high

Even if the remanufacturing is successful, because of the rounded corners of the diamond tip, it is difficult to ensure that the shape of the rounded corners of the grinding wheel is consistent every time; and each time the grinding wheel is trimmed, the tailstock must be recalibrated to adjust the straightness of the machine tool, which is inconvenient to use and low in efficiency.

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