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Modeling method of large-size ring-structure casting

A large-size, ring-type technology, applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve the problems of consuming steel structure materials, high production costs, high melting costs, etc., and achieve the effect of preventing casting deformation

Active Publication Date: 2011-05-25
KOCEL EQUIP
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

The workload of the workers is heavy, and it takes 7 days to complete the second-level and fifth-level ring molding alone; the utilization rate of the sand box is low, and two sets of sand boxes are needed, consuming a total of 129 tons of steel structure materials, and the overall production cost is relatively high;
[0005] 3) The cost of smelting a single piece is relatively high. The investment in secondary ring smelting is about 100,000 yuan, which requires 1560 hours of labor; Consumed man-hours 3120H
Moreover, the amount of molten steel melted by separate smelting is relatively small, which is not conducive to the full utilization of large-scale smelting equipment

Method used

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Examples

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Embodiment Construction

[0020] A molding method for a large-scale ring structure casting, characterized in that: the method includes the following steps:

[0021] a. Mold making: Using a five-axis CNC machining center, solid wood is used to make molds, the protruding belt parts are made into live materials, and dovetail grooves and pins are used for positioning. The rest of the molds are made as a whole. The upper box of the core box adopts a hanging tire structure. Make ingate positioning, welding hanging nose positioning, etc.;

[0022] b. Molding: Three boxes of combined sand boxes are used for solid modeling. When molding, first place the mold on the molding platform to make the middle ring. After the sand in the middle ring meets the molding hardness requirements, apply the parting agent, and then make the lower box. When lowering the box, it is necessary to lay the pouring system, etc., and finally the lower box and the middle box are turned over together to make the upper box hanging tire;

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Abstract

The invention relates to a modeling method, in particular to a modeling method of a large-size ring-structure casting, which is characterized in that the method comprises the following steps: mould manufacturing, modeling, unpacking and packing. The method improves the prior independent modeling scheme of rings, greatly improves the production efficiency, and enhances the strength of a mould, and the cost for manufacturing, modeling and smelting the mould is greatly reduced.

Description

technical field [0001] The invention relates to a molding method, in particular to a molding method of large-scale ring structure castings. Background technique [0002] At present, large-size circular and semi-circular steel castings are characterized by large diameter, thin wall and complex structure. For such castings, the domestic common modeling scheme is single-piece casting. Taking the outer ring of the low-voltage second-stage clapboard for 1 million-kilowatt nuclear power with a size of φ4170×617mm and φ5740×465mm, hereinafter referred to as the second-stage ring and the outer ring of the low-voltage fifth-stage clapboard, hereinafter referred to as the fifth-stage ring as an example, the existing casting The scheme mainly has the following disadvantages: [0003] 1) The cost of mold making is high. The second-level ring mold needs 16 square meters of wood, and the labor time is 2050H. The fifth-level ring mold needs 18 square meters of wood, and the labor time is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/22B22C9/02
Inventor 郭小强彭凡谢永祥付龙潘凤英鲁云杨磊杨茂海武江华白晋成
Owner KOCEL EQUIP
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