Centrifugal casting process for shell of bimetal compound metallurgical wedge hob

A centrifugal casting and bimetal technology, which is applied in the field of mining machinery and equipment, can solve the problems of difficult control of precision, low processing efficiency, high processing cost, etc., to meet the requirements of rigidity and easy processing, improve service life, and meet the requirements of strength and wear resistance Effect

Active Publication Date: 2011-01-26
BEIJING CHINA COAL MINE ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the first treatment method is that it is difficult to process and the processing cost is high; the disadvantage of the second treatment method is that the precision is not easy to control during surfacing welding, the processing efficiency is low, and the cost is also high

Method used

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  • Centrifugal casting process for shell of bimetal compound metallurgical wedge hob
  • Centrifugal casting process for shell of bimetal compound metallurgical wedge hob

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Embodiment Construction

[0021] Such as figure 1 Shown is a cross-sectional view of a wedge-toothed hob shell shell cast by composite metallurgy in the present invention. The wedge-toothed hob shell includes a cutter tooth 1, a bimetallic fusion transition layer 2 and a cutter body 3, and the The double-metal fusion transition layer 2 is formed by composite smelting of wear-resistant cast steel and low-carbon alloy steel.

[0022] When casting, the above two materials of wear-resistant cast steel and low-carbon alloy steel are smelted in two 200kg intermediate frequency high-temperature furnaces in a certain proportion and order. After the molten steel reaches the appropriate temperature, a certain amount of wear-resistant cast steel molten steel is injected into a centrifuge. A certain amount of molten low-carbon alloy steel molten steel is injected into the centrifuge. During the pouring process, the centrifuge rotates continuously at variable speeds, so that the cutter teeth and cutter body parts...

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Abstract

The invention relates to a centrifugal casting process for the shell of a bimetal compound metallurgical wedge hob, which sequentially comprises the steps of moulding, shell modification, spraying, mold shell assembling, molten steel smelting, deoxidization and slag removing, pouring, heat preservation and coring, blasting and sand removal, processing and finishing, heat treatment and the like. The wedge hob produced through the process above not only has the advantages of high hardness, good abrasion-resistance and the like, but also has good comprehensive mechanical properties such as stiffness, toughness and the like, thereby satisfying the requirements for strength and wear resistance of cutter teeth of the wedge hob, ensuring the manufacturability of the hob body, improving the service time of the cutter teeth of the wedge hob, and reducing the production cost.

Description

technical field [0001] The invention relates to mining machinery and equipment, in particular to a novel bimetal composite metallurgical centrifugal casting process for a wedge-toothed hob shell for rock-breaking drilling of a large vertical shaft drilling rig. Background technique [0002] Shaft drilling rig is a drilling machine used in coal field drilling, bridge pier, power station, geological exploration and other engineering construction. Knives are the type of knife commonly used for rock breaking hobs. [0003] The casing of the wedge-toothed hob for shaft drilling rigs is divided into two parts: the cutter body and the cutter teeth. The cutter body is the main body where the cutter shaft, bearings, and seals are installed. It requires compact structure, high machining accuracy, and good material rigidity. , Easy to process; the cutter tooth part is the main body of the rock breaking, directly contacting the rock, and the material is required to have high hardness a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D13/04B22D19/16B22D19/08
Inventor 王新刘志强王强武士杰徐广龙汪船程守业荆国业李丙乾杨红
Owner BEIJING CHINA COAL MINE ENG CO LTD
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