Manufacturing method of spheroidal graphite cast iron casting of wind power yaw variable-pitch device

A nodular cast iron and yaw technology, which is applied in the field of casting, can solve the problems of high labor intensity, poor precision of castings, and high difficulty in production, and achieve the effects of low environmental pollution, good surface quality, and reduced production costs

Inactive Publication Date: 2014-05-14
CHTC HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the shortcomings of the existing traditional sand casting process such as high labor intensity, high manufacturing difficulty, low efficiency, serious environmental pollution, poor casting precision, and large processing volume in the production of yaw pitch changer castings. Casting process to produce yaw propeller castings

Method used

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  • Manufacturing method of spheroidal graphite cast iron casting of wind power yaw variable-pitch device
  • Manufacturing method of spheroidal graphite cast iron casting of wind power yaw variable-pitch device
  • Manufacturing method of spheroidal graphite cast iron casting of wind power yaw variable-pitch device

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with embodiments:

[0029] The manufacturing method of the ductile iron castings of the wind power yaw pitch converter of the present invention includes the following steps:

[0030] a. Mold making: According to the structural characteristics of various yaw pitch devices, choose to make them into integral or split molds;

[0031] b. Foaming moulding: inject the copolymerized EPMMA material into the lost foam mold to make a whole or split yaw pitcher lost foam, then dry, repair the mold and bond the split lost foam together to form The lost foam is exactly the same as the yaw variable pitcher casting, and the inner gate and runner are glued on the lost foam;

[0032] c. Paint brushing: Brush the evaporative foam paint on the evaporative foam by dipping, eliminate air bubbles, and dry it in a drying room at 40-50℃ for 8-10 hours. Do this two to three times to make the coating thickness reach 1-2mm; The molding...

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Abstract

The invention discloses a manufacturing process of a spheroidal graphite cast iron casting of a wind power yaw variable-pitch device. The process comprises the following processes of mould making, foaming and moulding, paint brushing, boxing and shaping, electric furnace smelting, tundish-covering nodulizing treatment, vacuum-assist pouring and three-time inoculation treatment, wherein the boxing and shaping process is a layered assembling process, so that the production efficiency can be improved and the process yield can be increased; cold iron is vibrated and reasonably arranged, so that the compactness of tissues in the casting can be improved and the defect of shrinkage porosity can be avoided; by virtue of the processes of electric furnace smelting and tundish-covering nodulizing treatment, the nodulizing rate of the casting can be stabilized and increased and the mechanical properties of the casting can meet the technical quality requirements of wind power castings; the spheroidal graphite cast iron casting manufactured by the process is compact and uniform in tissue, hardly has defects, has good surface quality and high size precision; the casting forming of multiple layers of castings can be realized; and the production efficiency and the process product yield are improved.

Description

Technical field [0001] The invention relates to a lost foam casting process for a ductile iron casting of a wind power casting yaw pitch device, and belongs to the technical field of casting. Background technique [0002] Wind energy, as a clean and green energy source, is an important breakthrough in the adjustment of my country’s energy structure. It has been developing rapidly for many years. As the main component of wind turbines, the production volume of yaw pitch converter is increasing day by day, while traditional production processes are labor intensive. The shortcomings of high production difficulty, high consumption, low efficiency, etc. can no longer meet their growing actual needs and quality requirements. Therefore, it is urgent to study new technologies and processes to increase production. Summary of the invention [0003] The purpose of the present invention is to aim at the disadvantages of high labor intensity, high production difficulty, low efficiency, serious ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C33/10B22D18/04
Inventor 陈献西洪书淮穆富超余颂青
Owner CHTC HEAVY IND
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