Heat treatment process and tooling for shield machine cutter ring

Abstract

The invention discloses a heat treatment process and tooling for shield machine cutter rings. In the heat treatment process step, several cutter rings are first fixed on fixed shafts, and then put into heat treatment equipment for heating. After the heating is completed, the fixed shafts are placed on On the oil pool, put cooling oil in the oil pool in advance, the liquid level of the cooling oil is only below the blade of the knife ring, rotate the fixed shaft, the blade is oil-cooled and quenched during the rotation, and the knife seat of the knife ring is air-cooled and normalized, quenched After the completion, put the knife ring into the heat treatment equipment for tempering; thus, the method of separating the knife edge and the knife circle for heat treatment in the present invention realizes the purpose of making the knife edge obtain high hardness and the knife seat obtain high impact toughness, and solves the problem There is a technical problem that the impact toughness of the knife seat is difficult to be significantly improved by quenching the blade and the knife seat at the same time in the technology, thereby preventing the knife seat from easily chipping due to poor impact toughness and prolonging the service life of the knife ring .

Description

A kind of heat treatment process of shield machine cutter ring and its tooling technical field The present invention relates to the technical field of construction machinery, particularly relate to a kind of heat treatment process of shield machine cutter ring and its work Pack. Background technique In recent years, the construction of my country's transportation infrastructure has developed vigorously, and the subway tunnels and Chuanshan public roads planned and constructed by various provinces and cities The number of road mileage continues to rise, and the demand for full-face rock tunnel boring machines (referred to as shield machines TBM) has increased significantly. At present, the number of production and sales of shield machines in my country ranks among the top in the world. However, the key consumables of shield machines - the performance of the hob cutter ring Quality indicators have been slow to meet international standards. [0003] Under the harsh hard...

AI Technical Summary

Problems solved by technology

However, before partial tempering, the quenching process has largely determined the structural characteristics of the knife ring. The overall quenching process leads to poor impact toughness of the knife seat. Even partial tempering is difficult to improve the toughness of the knife seat. obvious improvement

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