Manufacturing method of composite double-metal cracking connecting rod

Abstract

The invention relates to a manufacturing method of a composite double-metal cracking connecting rod. The method disclosed by the embodiment of the invention comprises the following steps of: arranging a movable isolating plate at a big head part of a connecting rod cavity; dividing the mold cavity into two independent parts; firstly casting a connecting rod body and a connecting rod cover by adopting materials of a connecting rod main body; when large parts of the connecting rod body and the connecting rod cover are solidified, pulling out the isolating plate from the mold cavity, then injecting materials for cracking areas into the cavity formed after the isolating plate is pulled, and forming a composite double-metal casting piece by combining two materials in a metallurgical manner; and then finishing cracking separation for the connecting rod body and the connecting rod cover along preset cracking surfaces by adopting cracking equipment, and carrying out positioning and accurate assembly by utilizing a meshed intertongue structure on the two cracking surfaces. The manufacturing method of the composite double-metal cracking connecting rod has the advantages that the material selection range of the cracking connecting rod is expanded, the process is simple and feasible, the cost is low, and the assembling accuracy of the connecting rod is high; the technology is also suitable for manufacture of high-power engine connecting rods so as to meet the requirement for bearing high-load and large-torque connecting rods; and the process method has a wide application prospect.

Description

technical field [0001] The invention relates to a method for manufacturing a composite bimetal cracking connecting rod, which belongs to the field of engine component manufacturing. Background technique [0002] The connecting rod is one of the key components of the engine. During its working process, it mainly bears high-frequency alternating loads such as tension, compression, and bending generated by combustion explosive force and reciprocating inertial force. , vibration, etc. affect the service life of the connecting rod. Therefore, the connecting rod must have sufficiently high strength, stiffness and comprehensive mechanical properties. [0003] The traditional connecting rod adopts the split processing method. After the connecting rod blank is forged as a whole, the joint surface of the connecting rod body and the connecting rod cover is processed by sawing, milling, grinding, etc., and the positioning pin holes of the connecting rod cover and the bolts of the conne...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is that there are few optional types of connecting rod materials for cracking, difficult material preparation, and high price.

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