A method for assembling and fastening a main body core group used for forming an engine block

Abstract

The invention provides a main body core group assembling and fastening method applied to the technical field of engine cylinder block molding. Before a main body core group is assembled and fastened, a crankcase core (1) and two end face cores (2) are respectively manufactured in a main body core group mold, and the main body core group assembling and fastening method comprises the process steps: 1) taking out the manufactured crankcase core (1) and two end face cores (2) from the main body core group mold, and performing burr and flashing removal treatment on the crankcase core (1) and the two end face cores (2); 2) preassembling and transporting the crankcase core (1) and the two end face cores (2) to a core locking machine (5), performing core locking treatment on the crankcase core (1) and the two end face cores (2), and assembling the main body core group. According to the assembling and fastening method, the main body core group can be conveniently and rapidly assembled and fastened, the production cost and the rejection rate of the main body core group are reduced, and the cylinder production and processing efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of engine block forming, and more specifically relates to a method for assembling and fastening a main body core group used for forming an engine block. Background technique [0002] When cylinder block castings are produced on a high-pressure automatic molding line, the main body core group (including crankcase core and end face core) of the cylinder block usually needs to be assembled and fastened together, and then grabbed by the lower core fixture and lowered into the cavity. There are two methods for assembling and fastening the traditional main body core group. The first is the bolt fastening method. That is to reserve bolt holes on the main core, manually assemble the main core core groups, and fasten them with bolts. The bolts used are usually dead connected at one end, welded with a square anti-rotation piece, and the other end is added with a washer, and the nut is screwed and tightened. The sec...

AI Technical Summary

Problems solved by technology

When the process parameters such as negative number of sub-cores and negative numbers of sub-boxes of the cold core box are improperly set, and the dimensional accuracy of the tooling is poor, the size of the combined core may be large or small, resulting in the size of the casting being out of tolerance

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