Tool and method for forming high-precision miniature throttle valve filter screen

Abstract

The invention relates to a tool for forming a high-precision miniature throttle valve filter screen in the aviation field, belongs to the field of precision miniature filter screen forming stamping tools. The special forming tool ensures that the strength and the shape of a formed filter screen meet the use requirements. A manufacturing process comprises the following steps that 1) a perforated material sheet is prefabricated into a round material sheet with a certain diameter according to the size of a filter screen; (2) the round material sheet is placed in a sinking table of a female die; (3) a male die moves downwards, the round material sheet is made into a filter screen through extrusion and contraction, and the filter screen is ejected out from the lower portion of the female die; and (4) the male die returns to an original position under the action of a return spring. The forming tool is simple in structure and convenient to operate, 12 uniformly distributed wrinkles can be formed on the periphery of the filter screen in the filter screen forming process, the strength of parts is improved, meanwhile, tensile deformation of the parts in the stamping process can be avoided, and the size precision of filter screen holes is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of stamping processing equipment, and relates to a stamping tool and a stamping method, in particular to a tool and a forming method for forming a high-precision micro-throttle valve filter screen. Background technique [0002] In the hydraulic system, if the hydraulic oil is contaminated, it will affect the working efficiency of the hydraulic system, and in severe cases, the system will fail. Therefore, ensuring the cleanliness of the hydraulic oil is crucial to the normal operation of the hydraulic system. [0003] As a key component in the hydraulic system, the throttle valve plays a very important role in the hydraulic system. Its function is flow control, and the flow capacity of the oil circuit of the system is controlled through the internal shut-off hole of the throttle valve; the filter pressure, the front end of the throttle valve The pressure fluctuates greatly. After filtering through the thrott...

AI Technical Summary

Problems solved by technology

In the past, this kind of micro-screen was directly stamped and formed, but the strength of the filter produced by this method was not enough on the one hand, and on the other hand, the processing method would affect the filtration accuracy, that is, a large deformation occurred during the forming process , the deformation caused a large change in the shape of the filter

Therefore, traditional stamping and forming cannot guarantee parts requirements

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