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Production process of large scale gear for big gear ring of excavator

A production method and technology for large ring gears are applied in the production field of large-sized gears, which can solve the problems of occupying a lot of construction time, easy damage of large ring gears, etc., and achieve the effect of uniform distribution of structure and structure and high strength.

Active Publication Date: 2010-07-14
泉州江新机械有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

In this excavator, the large ring gear meshing with the pinion is easily damaged, and it takes a lot of construction time to replace the large ring gear every time

Method used

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Embodiment Construction

[0016] The embodiment discloses a method for producing a large-sized gear used for a large ring gear of an excavator, including the following steps:

[0017] 1) Preparation of materials: cut 55Kg of 50MN round steel, the diameter of the round steel is 200mm, put the round steel in a heating furnace and heat it to about 1200°C, and then use an air hammer or die forging hammer to beat the round steel into a pie structure;

[0018] 2), billet making: Immediately after step 1), punch a through hole with a diameter of 80 mm in the middle of the cake-shaped steel, and then place the cake-shaped steel on a ring rolling machine through the through hole for rolling and reaming, so that the cake shaped steel to form a circular billet with an inner diameter of 580mm;

[0019] 3) Punching die: Immediately after step 2), place the circular billet with a residual temperature above 1100°C between the upper die and the lower die of the punching machine. The upper die and the lower die are re...

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Abstract

The invention discloses a big-size gear manufacturing method. The manufacturing method includes the following steps: a certain quantity of steel is cut and heated to 1100 to 1300 DEG C, and then the steel is stamped into cake-shaped structure; a through hole with the diameter of 50 to 100 mm is punched at the middle part of the cake-shaped steel; the steel is placed on a ring-rolling machine for hole rolling and enlarging to lead the cake-shaped steel to be a ring-shaped billet with the internal diameter of 550 to 580 mm; the ring-shaped billet is placed between an upper mould and a lower mould of a punching die machine for mould-combing and die to get a wheel blank; the wheel blank is shaped in a temperature of 200 to 500 DEG C after overlaps and burrs are removed; the wheel blank is treated in the temperature of 830 to 880 DEG C to lead the hardness to reach HRC 30 to 38; a medium quenching is carried out after the quality is regulated to lead the hardness to reach HRC 50 to 58 and the depth of a quenching layer is 6 to 12 mm; a final processing can be carried out in the end to get a finished gear. The gear has equal strength distribution and long service life.

Description

technical field [0001] The invention relates to a gear production method, in particular to a production method of a large-size gear used for a large ring gear of an excavator. Background technique [0002] The known large-size gears are generally made by casting. Since the teeth on the gears are small in size and in large numbers, the crystallization time, temperature, and pressure of each tooth are different when the molten steel is poured, and the strength of the entire gear is different. Uneven, such large-sized gears are easily damaged when running under heavy loads. As disclosed in the Chinese patent CN2609972 announced on April 7, 2004, it includes an excavating mechanism located on the workbench, the workbench is connected to the chassis of the running mechanism, and the workbench is installed on the slewing bearing. On the chassis of the traveling mechanism, a hydraulic rotating mechanism is installed between the workbench and the chassis, and a control valve and a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/14
Inventor 陈忠明
Owner 泉州江新机械有限公司
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