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Casting process of two-stage planet carrier of climbing machine for ocean platform

An offshore platform and casting process technology, applied in the field of metal casting, can solve the problems of high dimensional accuracy, high surface quality requirements, high smelting process and operation difficulty, and difficulty in guaranteeing the internal quality of castings. The effect of meeting performance requirements

Active Publication Date: 2014-12-03
常熟市虹桥铸钢有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the analysis of technical requirements, materials, and structural characteristics, the production of planetary carriers mainly has the following difficulties: castings are high-strength structural steel, and the smelting process and operation are very difficult; fatal defects such as cracks, pores, and sand holes are prone to occur during the casting process; internal quality of castings It is difficult to guarantee; the material is medium-carbon high-strength alloy steel, and the heat treatment process is very critical; the requirements for dimensional accuracy and surface quality are high

Method used

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  • Casting process of two-stage planet carrier of climbing machine for ocean platform
  • Casting process of two-stage planet carrier of climbing machine for ocean platform
  • Casting process of two-stage planet carrier of climbing machine for ocean platform

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The secondary planetary carrier casting of the offshore platform climbing machine is made of ZG35Gr1Mo material, and the main elements and contents of the material are as follows:

[0032]

[0033] The secondary planetary carrier casting of the offshore platform climbing machine is obtained by integral casting molding process and heat treatment, including the following processing steps:

[0034] (a) Molten steel smelting: putting the ZG35Gr1Mo material into an electric arc furnace to smelt into molten steel;

[0035] (b) Casting process: The sand mold upper box and the sand mold lower box constitute the casting cavity. A core box is placed in the middle of the cavity, and then the pre-casting preparation is carried out according to the above method. One box casts 2 pieces, pouring 950kg of molten steel, and the pouring temperature is 1560°C, the pouring time is 20s, the box is loosened after pouring for 1 hour, and the mold is demoulded after 24 hours of heat preserv...

Embodiment 2

[0039] The secondary planetary carrier casting of the offshore platform climbing machine is made of ZG35Gr1Mo material, and the main elements and contents of the material are as follows:

[0040]

[0041] The secondary planetary carrier casting of the offshore platform climbing machine is obtained by integral casting molding process and heat treatment, including the following processing steps:

[0042] (a) Molten steel smelting: putting the ZG35Gr1Mo material into an electric arc furnace to smelt into molten steel;

[0043] (b) Casting process: The sand mold upper box and the sand mold lower box constitute the casting cavity. A core box is placed in the middle of the cavity, and then the pre-casting preparation is carried out according to the above method. One box casts 2 pieces, pouring 950kg of molten steel, and the pouring temperature is 1540°C, the pouring time is 25s, the box is loosened after pouring for 1 hour, and the mold is demoulded after 24 hours of heat preserv...

Embodiment 3

[0047] The secondary planetary carrier casting of the offshore platform climbing machine is made of ZG35Gr1Mo material, and the main elements and contents of the material are as follows:

[0048]

[0049] The secondary planetary carrier casting of the offshore platform climbing machine is obtained by integral casting molding process and heat treatment, including the following processing steps:

[0050] (a) Molten steel smelting: putting the ZG35Gr1Mo material into an electric arc furnace to smelt into molten steel;

[0051] (b) Casting process: The sand mold upper box and the sand mold lower box constitute the casting cavity. A core box is placed in the middle of the cavity, and then the pre-casting preparation is carried out according to the above method. One box casts 2 pieces, pouring 950kg of molten steel, and the pouring temperature is 1550°C, the pouring time is 24s, the box is loosened after pouring for 1 hour, and the mold is demoulded after 24 hours of heat preserv...

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Abstract

The invention discloses a casting process of a two-stage planet carrier of a climbing machine for an ocean platform. A two-stage planet carrier casting of the climbing machine for the ocean platform is made from a ZG35Gr1Mo material by adopting a whole cast molding process in a heat treatment manner. The casting process comprises the following processing steps: (a) smelting molten steel; (b) casting; (c) carrying put normalizing and tempering pretreatment; and (d) carrying out quenched-tempered heat treatment. In the manner, according to the casting process, the passing rate of two-stage planet carrier casting finished products of the climbing machine for the ocean platform can be greatly increased, and the castings are high in surface accuracy, can meet the requirements of mechanical property, and can achieve the ABS acceptance standard.

Description

technical field [0001] The invention relates to the technical field of metal casting, in particular to a casting process for a secondary planet carrier of an offshore platform climbing machine. Background technique [0002] Due to the advantages of light weight, strong load capacity and high efficiency, planetary gear transmission is widely used in various industrial fields. As one of the key parts in planetary gear transmission, the planetary carrier has a great influence on the contact stress distribution generated by gear meshing due to its deformation, so the planetary carrier should have sufficient static strength and certain rigidity. From the analysis of technical requirements, materials, and structural characteristics, the production of planetary frames mainly has the following difficulties: castings are high-strength structural steel, and the smelting process and operation are very difficult; fatal defects such as cracks, pores, and sand holes are prone to occur dur...

Claims

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Application Information

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IPC IPC(8): B22C9/22B22C9/08C21D9/00C22C38/22
Inventor 陈学忠张明均
Owner 常熟市虹桥铸钢有限公司
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