Dedicated core of multipath hydraulic control main body valve for manufacturing heavy duty excavator

Abstract

The present invention discloses a dedicated core of a multipath hydraulic control main body valve for manufacturing a heavy duty excavator. The main body valve dedicated core is three layers of multipath. The main body valve core is integrally molded by a sheet core through a strip shaped core head as a casting flow path distribution structure, and then mutually positioned through the core head. The strip shaped core heads are connected end to end to form a square structure. An intermediate layer main body valve core is of a long strip shaped core. A bottom layer main body valve core is of three c-type supports parallelly distributed on an upper layer main body valve square structure. The sheet core is formed integrally by the strip core head, and then mutually positioned by the core head. The combination accuracy of the core is improved. The problems that the core is needed to be assembled by core-shell or using tooling previously, efficiency is low and loss of the core is relatively large in the process of core carrying and core drying are solved.

Description

Technical field [0001] The invention relates to a special mud core for a multi-channel hydraulic control main valve of a heavy excavator, in particular to a special mud core for a multi-channel hydraulic control main valve with high precision and multiple flow channels. Background technique [0002] The invention relates to a ZYW-J28-2-1 valve body. It is the main valve body of multi-channel hydraulic control on a 20-ton excavator. It is a key research and development project of heavy equipment units and is also one of the key research projects in hydraulic technology by the country. [0003] The ZYW-J28-2-1 valve body is a 20-ton multi-channel control valve body for excavation. Its structure and function are equivalent to the fifth-generation valve body produced by Japan’s Kawasaki Company. It is more complex than its structure and has superior performance. The core component of the machine. [0004] 1. The main index parameters and research content of the valve body [0005] 1. Ma...

AI Technical Summary

Problems solved by technology

[0013] (1) The internal structure of the hydraulic casting is complex, which is a multi-layer and multi-channel structure, and requires high dimensional accuracy. Therefore, the technical difficulties to be overcome: the core parting process, the combined positioning process of the core and the combination of the core overall structure process

[0014] There is no domestic technology that can be referred to for the above-mentioned technical difficulties, and there is no literature report on the valve body in the relevant international literature.

Images