Tailor welding method for hydraulic support push rod with liquid supply and return function

Abstract

The invention provides a tailor welding method for a hydraulic support push rod with a liquid supply and return function. A push rod comprises a cover plate, a middle plate, a bottom plate and a liquid supply and return mechanism, before a connector base and a liquid passing pipe are welded, before the connector base and the middle plate are welded and before the connector base and the cover plate are welded, a metal plug is installed in a liquid passing hole of the connector base firstly, the metal plug is formed by machining round steel, the metal plug comprises a blocking cover, a plug body and an external thread section which are sequentially connected from top to bottom, the diameter of the blocking cover is larger than the inner diameter of the liquid passing hole, the diameter of the plug body is less than the inner diameter of the liquid passing hole by 2 millimeters, an annular groove is formed in the connecting position of the plug body and the external thread section, internal threads matching with each other are arranged at the position, corresponding to the external thread section, of the deep position of the liquid passing hole, and the number of threads of the external thread section is not larger than 3. The tailor welding method for the hydraulic support push rod with the liquid supply and return function has the advantages of being scientific in design, not prone to deformation, high in product reliability and long in service life.

Description

technical field [0001] The invention relates to the field of tailor welding of hydraulic support structural parts, in particular to a tailor welding method for a push rod of a hydraulic support with a liquid supply and return function. Background technique [0002] The hydraulic support is the support equipment of the coal mine fully mechanized mining face, and the push rod is an important part for the hydraulic support to move forward. The functions of pushing and pulling the frame are realized through the telescopic action of the push jack connected to it. The cross-sectional area of ​​many thin coal seam working faces is small. Due to the limitation of the working space, the layout space for the liquid supply system of the hydraulic support and various control valves is very small. In extreme cases, it is even impossible to arrange all the valve piping parts at the same time; , the applicant has designed a push rod integrated with a liquid supply and return line, which is...

AI Technical Summary

Problems solved by technology

[0003]For the push rod integrated with the liquid supply and return line, the liquid supply and return line is mainly welded together with the middle plate, bottom plate and cover plate of the push rod through the joint seat , due to the concentrated heat of the joint seat, the traditional welding method can easily cause the inner hole of the joint seat to be heated and deformed, which will reduce the reliability of the liquid supply structure and fail to meet the quality requirements of the push rod

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