Process for inlaying alloy teeth of rock drilling bit

Abstract

The invention discloses a process for inlaying alloy teeth of a rock drilling bit. The process comprises the steps of 1, selecting a good-quality high manganese round steel and processing the good-quality high manganese round steel into a liner bushing; 2, carrying out vacuum water quenching, tempering and heat preservation on the processed liner bushing, and then carrying out air-cooling treatment; 3, carrying out finish machining on an inner hole of the linear bushing; 4, performing thermal treatment on the linear bushing machined with the inner hole, and pressing the alloy teeth into the linear bushing under appropriate conditions; 5, performing high-speed shot blasting treatment on the teeth-inlaid linear bushing; 6, accurately grinding the outer circular surface of the teeth-inlaid linear bushing; 7, enabling the teeth-inlaid linear bushing to be in interference fit with teeth holes. The process for inlaying the alloy teeth of the rock drilling bit has the advantages that the liner bushing is arranged to sleeve the alloy teeth, so that the holding force is enhanced by enlarging the effective combination surface by increasing the length, and the magnitude of interference can be reduced appropriately without increasing the alloy cost, and therefore, the teeth can be fixed firmly, and also the drilling bit body and the alloy teeth can be protected against damage; meanwhile, under the protection action of the liner bushing, because the stress is basically eliminated in the process of inlaying the teeth in the linear bushing, the phenomena of alloy tooth breakage and steel body collapse are reduced remarkably, and the service life of the drill bit is prolonged.

Description

technical field [0001] The invention relates to a mining rock drilling bit, in particular to an alloy tooth inlay process for a column tooth rock drilling bit with a medium and large diameter. Background technique [0002] At present, the alloy teeth of medium and large-diameter column tooth drill bits generally adopt the cold-pressed tooth inserting process, and the alloy teeth are pressed into the tooth hole under a certain pressure at room temperature. Although this process is simple to operate, it has serious defects. The main reason is that the working conditions and environment of the drill bit are extremely harsh, and the force of the alloy teeth in the working state is complicated. They must bear large high-frequency impact force and strong radial extrusion during the drill bit feeding process. At the same time, it is necessary to overcome the friction force generated in the rock cutting process, etc. In order to ensure that the alloy has sufficient holding force and...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome technical problems such as alloy tooth drop and broken teeth due to the poor corrosion resistance and wear resistance of the drill head due to the large amount of interference in the cold-pressed interference inlaid teeth process, the steel body will easily lead to collapse or broken teeth, The invention provides a rock drill bit alloy tooth inlaid process combining bushing, hot inlaid and cold pressure interference on the alloy teeth

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