Manufacturing method for casting branch oilway in body of diesel engine

Abstract

The invention relates to the technical field of a diesel engine, in particular to a manufacturing method for casting an branch oilway in a body of the diesel engine. The manufacturing method comprises the following steps of: a, cutting out a seamless steel tube with required length and welding a round bar steel on a lower part of the seamless steel tube; b, performing tin plating on the seamless steel tube welded with the round bar steel; c, manufacturing a core, and filling zircon precoated sand into the seamless steel tube; d, after the core is manufactured, putting the core and a mould into a furnace for baking, wherein the baking temperature is between 150-180 DEG C and the baking time is between 3-7 hours; and e, when the core is installed, installing one end of the core of the branch oilway in a core seat on a core of a main oilway and installing the other end of the core in a core seat on a core of a thrust camshaft seat, filling paper and other substances into reserved gaps of the top ends of the core seats, and levelling by newly-mixed resin sand. The manufacturing method provided by the invention is used to avoid air hole generation and the like caused by rusting of the seamless steel tube and higher moistures in red sand mud and cleaning difficulty caused by iron penetrating into the branch oilway, adhesion of a ceramic pipe and other phenomena.

Description

technical field [0001] The invention relates to a branch oil passage of a diesel engine, in particular to a method for manufacturing a diesel engine body casting a branch oil passage. Background technique [0002] On the 280 series diesel engine body, the branch oil passage located between the main oil passage and the thrust camshaft seat is designed to be cast directly. The original seamless steel pipe was used to line the ceramic pipe and then filled with graphite powder and magnesia powder. The end is made by plugging with red sand mud, and defects such as iron seepage in the branch oil passage, adhesion of ceramic pipes, and pores are often found, making it very difficult to clean this part, and serious defects may even cause scrapping. Contents of the invention [0003] The technical problem to be solved by the present invention is: in the prior art, the branch oil passage between the main oil passage and the thrust camshaft seat, in its existing design, it is often f...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: in the prior art, the branch oil passage between the main oil passage and the thrust camshaft seat, in its existing design, it is often found that there are phenomena such as iron seepage in the branch oil passage, ceramic pipe adhesion and so on. Defects such as air holes make it very difficult to clean this part, and serious defects may even cause scrapping. A method for manufacturing branch oil passages cast out of a diesel engine body is provided.

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