Large scale gear production process

A production method and large-size technology, which is applied in the production of large-size gears with large diameters, can solve the problems that large ring gears are easily damaged and take up a lot of construction time, and achieve the effect of high strength and uniform structure distribution

Active Publication Date: 2008-05-28
泉州江新机械有限公司
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  • Summary
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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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Examples

Experimental program
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Embodiment Construction

[0016] The embodiment discloses a method for producing a large-size gear, including the following steps:

[0017] 1). Material preparation: 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℃, then use an air hammer or a die forging hammer to beat the round steel into one Pie-like structure

[0018] 2). Billeting: immediately after step 1, punch a through hole with a diameter of 80mm in the middle of the pie-shaped steel material, and then place the pie-shaped steel material on the ring rolling machine through the through hole for rolling and expanding the pie-shaped steel material. The steel forms a circular billet with an inner diameter of 580mm;

[0019] 3) Die: Immediately after step 2, put the ring steel billet with a residual temperature of 1100°C or more between the upper die and the lower die of the die machine. The upper die and the lower die are respectively provided with a gear struc...

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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 for producing large-size gears with a larger diameter. Background technique [0002] Known large-size gears are generally made by casting. Because the gear teeth on the gear are small in size and large in number, the crystallization time, temperature, and pressure of each gear tooth are different when 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 load. For example, an excavator disclosed in the Chinese patent with the announcement number CN2609972 published on April 7, 2004, includes an excavating mechanism arranged on a workbench, the workbench is connected to the chassis of the traveling mechanism, and the workbench is installed on a slewing bearing. On the chassis of the traveling mechanism, a hydraulic rotating mechanism is installed between the workbench and the ch...

Claims

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Application Information

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IPC IPC(8): B23P15/14
Inventor 陈忠明
Owner 泉州江新机械有限公司
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