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Casting process of large-scale mining excavator part driving wheel

A casting process and excavator technology, which is applied to the casting process field of the driving wheel of large mining excavator components, can solve the problems of wear or fracture, poor performance and high performance requirements, and achieve the purpose of improving service life and improving bending resistance. Effect

Active Publication Date: 2014-04-02
HUZHOU ZHONGLIAN MACHINERY EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The driving wheel (drive wheel) is the main part of the walking part of a large excavator. The performance requirements are high. The current manufacturing process adopts casting molding, but the casting process and heat treatment process are different. It is necessary to ensure the internal quality and various mechanical performance requirements. , poor performance can easily cause problems such as wear or fracture

Method used

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  • Casting process of large-scale mining excavator part driving wheel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Electric arc furnace is used to smelt steel, and aluminum, rare earth and silicon-zirconium alloy are added for strong deoxidation. The final oxygen content in molten steel is ≤60PPm. The ladle is blown with argon gas to turn the surface of the molten steel on the ladle for 2 minutes to purify and remove impurities. Control the pouring temperature to keep it within the range of 1550-1560°C to ensure pouring of high-quality molten steel. The molding sand is made of ferrochrome resin sand, the holding temperature is 1550°C, and the time is 4 hours. The external chilled iron auxiliary riser is used to achieve sequential solidification. The furnace is normalized, the normalizing temperature is 900-910°C, the riser is removed, ground and finished at a temperature not lower than 300-500°C, the position of the driving wheel bump is checked with a sample, and the temperature is around 550°C after rough machining Lower tempering, overall quenching and tempering at a temperature o...

Embodiment 2

[0021] Electric arc furnace is used to smelt steel, and aluminum, rare earth and silicon-zirconium alloy are added for strong deoxidation. The final oxygen content in molten steel is ≤60PPm. The ladle is blown with argon gas to turn the surface of the molten steel on the ladle for 4 minutes to purify and remove impurities. Control the pouring temperature to keep it within the range of 1550-1560°C to ensure the pouring of high-quality molten steel. The molding sand is made of ferrochrome resin sand, the holding temperature is 1560°C, and the time is 6 hours. The external chilled iron auxiliary riser is used to achieve sequential solidification. The furnace is normalized, the normalizing temperature is 900-910°C, the riser is removed, ground and finished at a temperature not lower than 300-500°C, the position of the driving wheel bump is checked with a sample, and the temperature is around 550°C after rough machining Lower tempering, overall quenching and tempering at a temperatu...

Embodiment 3

[0024] Steel is smelted in an electric arc furnace, and aluminum, rare earth and silicon-zirconium alloys are added for strong deoxidation. The final oxygen content in molten steel is ≤60PPm. The surface of the molten steel is blown with argon gas on the ladle for 3 minutes to purify and remove impurities. Control the pouring temperature to keep it within the range of 1550-1560°C to ensure the pouring of high-quality molten steel. The molding sand is made of ferrochrome resin sand, the holding temperature is 1550°C, and the time is 5 hours. The external chilled iron auxiliary riser is used to achieve sequential solidification. The furnace is normalized, the normalizing temperature is 900-910°C, the riser is removed, ground and finished at a temperature not lower than 300-500°C, the position of the driving wheel bump is checked with a sample, and the temperature is around 550°C after rough machining Lower tempering, overall quenching and tempering at a temperature of 920-930°C. ...

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Abstract

The invention relates to a casting process of a large-scale mining excavator part driving wheel. The process is as below: smelting is carried out in an arc furnace with furnace temperature at 1550-1560 DEG C, aluminum, rare earth and silicon zirconium alloy are added for strong deoxidation, argon is blown into ladle for purification in order to remove impurities, and finally the oxygen content of the molten steel is no higher than 60 PPm. Pouring temperature is strictly controlled at 1550-1560 DEG C to ensure casting of high quality molten steel, molding sand employs a ferrochrome resin sand, furnace charge and normalization are carried out after shakeout, the normalization temperature is at 900-910 DEG C, riser removal and reconditioning finishing are conducted at no lower than 300-500 DEG C and, a sample plate is used for checking the position of lug of the driving wheel, and after roughing tempering is carried out at 550 DEG C and overall hardening and tempering is carried out at 920-930 DEG C. The process improves bending resistance, anti-torsion strength and surface contact strength of the driving wheel and prolongs the service life of the transmission parts.

Description

technical field [0001] The invention belongs to the technical field of metal casting, and relates to a casting process of a driving wheel of a large mining excavator component. Background technique [0002] With the increasing production scale of open-pit mines at home and abroad, the level of mining technology and equipment technology is increasing. In order to further improve the economic benefits and labor productivity of enterprises and reduce production costs, mining excavators with larger specifications have gradually replaced small specifications. It is an irreversible trend to develop large-scale excavation equipment and open-pit mining equipment (excavators). Almost all open-pit mines have chosen better performance, more advanced technology, better reliability, higher production efficiency, easier maintenance and maintenance, lower equipment consumption, and longer service life in new construction, reconstruction and expansion. Large-scale mining excavator with bet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/44C22C33/04B22C1/00B22C9/28
Inventor 陈国祥张荫涛王建国屠建军戴超李秀清
Owner HUZHOU ZHONGLIAN MACHINERY EQUIP
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