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Casting process for heavy-section workbench

A casting process and workbench technology, which is applied in the direction of manufacturing tools, casting molding equipment, casting molds, etc., can solve the problems of low casting pass rate and insufficient effect, so as to avoid shrinkage and porosity defects, reduce casting defects, and shorten the production cycle. shortened effect

Inactive Publication Date: 2012-04-18
NINGXIA KOCEL GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used method is to solve the hardness problem by increasing the alloy, but it is difficult to solve the shrinkage porosity problem of the table; the other is to use the process method of placing sand and cold iron, but the effect of this method is not obvious enough and the casting The pass rate is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: A casting process for a thick and large cross-section workbench, the process includes the following steps:

[0018] a. Mold making: the skeleton of the mold is made of wood, and other structures are made of EPS;

[0019] b. Molding and core making: resin sand is used for molding, and EPS is removed after mold removal;

[0020] c. Combined box: the thickness of the placed direct cooling cold iron = 0.4 times the wall thickness of the thick and large section workbench, the unit is mm, the distance between the cold irons is 18mm, and the distance between the cold iron and the edge of the table is 35mm;

[0021] d. Pouring: the cross-sectional area of ​​the sprue of the closed pouring system, the cross-sectional area of ​​the runner: the sum of the cross-sectional area of ​​the inner runner = 1: 2.0: 0.8;

[0022] e. Shakeout cleaning.

[0023] The number of times the cold iron can be reused in the above box closing process cannot be more than 3 times, and t...

Embodiment 2

[0024] Embodiment 2: A casting process for a thick and large cross-section workbench, the process includes the following steps:

[0025] a. Mold making: the skeleton of the mold is made of wood, and other structures are made of EPS;

[0026] b. Molding and core making: resin sand is used for molding, and EPS is removed after mold removal;

[0027] c. Combined box: the thickness of the placed direct cooling cold iron = 0.3 wall thickness (mm), the distance between the cold irons is 20mm, and the distance between the cold iron and the edge of the table is 30mm;

[0028] d. Pouring: the cross-sectional area of ​​the sprue of the closed pouring system, the cross-sectional area of ​​the runner: the sum of the cross-sectional area of ​​the inner runner = 1: 1.8: 0.7;

[0029] e. Shakeout cleaning.

[0030] The number of times the cold iron can be reused in the above box closing process cannot be more than 3 times, and the weight of the pressed iron in the box after box closing is ...

Embodiment 3

[0031] Embodiment 3: A casting process for a thick and large cross-section workbench, the process includes the following steps:

[0032] a. Mold making: the skeleton of the mold is made of wood, and other structures are made of EPS;

[0033] b. Molding and core making: resin sand is used for molding, and EPS is removed after mold removal;

[0034] c. Combined box: the thickness of the placed direct cooling cold iron = 0.5 times the wall thickness of the thick and large section workbench, the unit is mm, the distance between the cold irons is 15mm, and the distance between the cold iron and the edge of the table is 40mm;

[0035] d. Pouring: the cross-sectional area of ​​the sprue of the closed pouring system, the cross-sectional area of ​​the runner: the sum of the cross-sectional area of ​​the inner runner = 1: 2.2: 0.9;

[0036] e. Shakeout cleaning.

[0037] The number of times the cold iron can be reused in the above-mentioned box closing process cannot be greater than 3...

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Abstract

The invention relates to a casting process, in particular to a casting process for a heavy-section workbench. The casting process is characterized by comprising the following steps of: manufacturing a mold; molding; making a core; assembling the mold; casting: casting a downsprue sectional area, a cross gate sectional area and an in-gate sectional area in the ratio 1: (1.8-2.2):(0.7-0.9) by adopting a fully-enclosed casting system; and performing shakeout cleaning. In the casting process, a method for placing direct-cooled iron chill is adopted under the condition of not increasing the alloy adding amount, and a fully-enclosed casting system is adopted, so that the problems of hardness, shrinkage porosity and surface quality of a table-board can be solved, and the yield of castings can be increased simultaneously without increasing the cost.

Description

technical field [0001] The invention relates to a casting process, in particular to a casting process of a workbench with a thick and large section. Background technique [0002] Thick and large section workbench refers to the total length of 3000-3500mm, width of 1600-1700mm, height of 700-800mm, the maximum thickness of the working surface is 80-120mm, the weight of the casting is 8000-1000Kg, the material of the casting is ASTMclass35, HB>180, this kind of work The casting thickness of the countertop section of the table exceeds 100mm, and the material requirement is American standard 35, which is equivalent to the Chinese national standard HT250. The physical detection hardness of the table top must be greater than 180 Brinell hardness. At present, the commonly used method is to solve the hardness problem by increasing the alloy, but it is difficult to solve the shrinkage porosity problem of the table; the other is to use the process method of placing sand and cold ir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C7/00B22C9/04B22C9/08
Inventor 薛蕊莉张守全朱劲松原晓雷徐国强
Owner NINGXIA KOCEL GRP CO LTD
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