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Machining method of traveling thrust wheel of large excavator

A processing method and technology of track rollers, which are applied in the field of mechanical processing, can solve the problems that the mechanical properties and service performance of track rollers cannot meet the production and use requirements, and achieve the effects of easy control of casting size, low production cost, and good mechanical properties

Inactive Publication Date: 2011-03-02
无锡得戟重工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of raw materials, the mechanical properties and service performance of the existing cast rollers cannot meet the needs of production and use.

Method used

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  • Machining method of traveling thrust wheel of large excavator
  • Machining method of traveling thrust wheel of large excavator
  • Machining method of traveling thrust wheel of large excavator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: as figure 2 As shown, a processing method of a large excavator traveling track roller, first adopts silicon-manganese steel to cast a track roller blank, and then through mechanical finishing into a finished track roller; and figure 1 Compared with the processing of original forgings, the machining allowance of the supporting wheel is greatly reduced, saving raw materials and reducing the workload of machining. In the figure, 1 is the processing allowance part of the supporting wheel, and 2 is the finished section of the supporting wheel. Higher strength grade materials are used to replace the original supporting wheel materials, and the mechanical properties and service performance are not lower than the original forging material level. The silicon-manganese steel used is made of the following components: carbon 0.18%, silicon 1.5%, manganese 1.5%. , 0.5% chromium, 0.01% sulfur, 0.01% phosphorus, and the balance is iron and unavoidable impurities, expre...

Embodiment 2～5

[0023] Embodiment 2~5: a kind of processing method of large-scale excavator traveling supporting roller, its preparation method is the same as embodiment 1, and difference is that the content of the component of silicon-manganese steel used is different, and the content of each component is shown in Table 2 .

[0024] The content of each component in table 2 embodiment 2~5, by weight percentage;

[0025] Example

[0026] silicon%

[0027] The balance is iron and unavoidable impurities.

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Abstract

The invention discloses a machining method of a traveling thrust wheel of a large excavator, which is characterized by comprising the following steps: firstly, casting silico-manganese steel into a thrust wheel blank and then carrying out machine finishing on the blank to obtain the finished product of the thrust wheel. The silico-manganese steel is prepared from the following components in percentage by weight: 0.14-0.25% of carbon, 0.8-2.0% of silicon, 0.8-2.0% of manganese, 0.35-1.2% of chromium, no more than 0.025% of sulfur, no more than 0.025% of phosphorus and the balance of ferrum and unavoidable impurities. In the invention, by adopting a casting method instead of a forging method, the section shape of the cast blank is approximate to that of the finished product, the size of the casting is easily controlled, and the machining allowance is smaller and uniform; and as the materials with higher strength grade are used instead of the original thrust wheel material, the mechanical properties and the service performances are not lower than the level of the original forging material, and the machining process is unchanged and is more easily operated.

Description

technical field [0001] The invention belongs to the field of mechanical processing, and in particular relates to a processing method for traveling support wheels of a large excavator. Background technique [0002] The crawler traveling device of a large mining excavator contains multiple heavy-duty supporting wheels, which require high strength and wear resistance. It is generally made of high-quality alloy steel after forging. Limited by the forging process and precision, the cross section of the forging blank is round cake shape, but the actual roller has hub bosses, so the excess material must be processed, and the processing allowance is large, resulting in a large waste of raw materials 1. The machining workload is large, the production cycle is long, and the manufacturing cost is high. [0003] If the casting method is used for processing, the cross-sectional shape of the casting blank is directly processed into a shape close to that of the finished product, the mach...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/18C22C38/38B62D55/02
Inventor 江小明覃保成
Owner 无锡得戟重工有限公司
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