Combined metallurgical furnace taphole drill bit and tooth fixing process thereof

Abstract

The invention discloses a combined metallurgical furnace taphole drill bit and a tooth fixing process thereof. The drill bit comprises a drill bit body, wherein four windmill-shaped alloy bases are arranged at the four corners of the side wall of the drill bit body, a blind hole is arranged at the top center of each alloy base, and cylindrical tooth alloy is welded in the blind holes ;an alloy groove is formed in the top surface of the drill bit body, and sheet alloy is welded in the alloy groove; the center of the end face of the drill bit body is provided with a positioning block, and the positioning block is provided with a ventilation hole overlapped with the central axis of the drill bit body. According to the drill bit, a punching mode crushing is combined with a shearing mode crushing, so that accurate positioning can be realized, steped grading drilling footage can be carried out, deviation and displacement of the drill bit in the tapping process can be prevented, impact force and crushing tasks can be decomposed on each grain of columnar tooth alloy and sheet alloy, and the utilization rate of alloy on the drill bit and the service life of the drill bit are improved; copper alloy solder is adopted to weld the column tooth alloy in the blind holes, so that the column tooth alloy is not easy to fall off and has high temperature resistance and certain toughness.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a combined metallurgical furnace tap hole drill bit and its tooth fixing process. Background technique [0002] The taphole machine is a common equipment in ironworks. Its function is to open the taphole at a certain angle so that the molten iron can flow out of the channel smoothly. Therefore, the stability and opening capacity of the taphole machine directly affect the performance of the ironmaking blast furnace. Production and process flow. The tapping machine is mainly composed of a rotary part and a drilling part. The drilling part is mainly composed of a propulsion part and a punching part. The front end of the punching part is provided with a drill bit. The column tooth alloy and the drill bit body are assembled by interference fit and cold pressing, and the sheet alloy or column tooth alloy and the drill bit body are welded with ordinary brass solder. Under the condi...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a combined metallurgical furnace tap hole drill bit and its tooth-fixing technology to solve the problems that the column tooth alloy on the metallurgical furnace tap hole drill bit is easy to fall off, the sheet alloy is easy to wear, and the service life of the drill bit is low.

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