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Iron pattern sand-lined casting process

A casting process, iron mold sand-coated technology, applied in the direction of manufacturing tools, casting molding equipment, casting molds, etc., can solve deformation, long size, uneven, the thinnest part is only 10 mm, and the thickest part can even reach 76 mm and other issues, to achieve the effect of high dimensional accuracy, small deformation, and reduced deformation

Inactive Publication Date: 2015-01-21
SHANXI LINFEN INTEGRITY CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of axle housing casting is generally long in size, with uneven wall thickness. The thinnest part is only 10 mm, and the thickest part can even reach 76 mm. There will be a large opening at the middle gear bag.
The traditional iron mold sand-covered casting process will cause serious deformation problems in the casting production of these castings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Iron mold sand-covered casting process, according to the following process:

[0021] The first step is to transfer the lower sand box and the upper sand box to the cleaning area. The upper sand box and the lower sand box are turned over by the turning machine so that the opening direction is downward, and then the upper and lower sand boxes are sent to the top perforating machine for cleaning. The molding sand in the hole will enter the vibrating shakeout machine to clean the residual sand in the cavity to complete the cleaning work. Turn the cleaned upper sand box and lower sand box through the box turning machine to the opening direction upward. After manual inspection, according to the sand The temperature of the box is adjusted. After the temperature adjustment, the upper sand box and the lower sand box are turned over and the opening direction is downward, waiting for molding;

[0022] The second step is to send the upper sand box and the lower sand box into the mo...

Embodiment 2

[0031] The difference between this example and Example 1 is that the process conditions in the fifth step are that the pouring temperature of the molten iron is 1600°C, and the pouring time is less than 60 seconds; the temperature of the molten iron is 1650°C, and the spheroidization and inoculation treatments are carried out. The high temperature of the furnace can shorten the time from the furnace to the pouring, and reduce the degree of oxidation of the molten iron by the external environment. The content of carbon in the molten iron is 4.0%, and the content of silicon is 2.5%.

Embodiment 3

[0033] The difference between this example and Example 1 is that the process conditions in the fifth step are that the pouring temperature of the molten iron is 1500°C, and the pouring time is less than 60 seconds; wherein the temperature of the molten iron is 1550°C, and the spheroidization and inoculation treatments are carried out. The high temperature of the furnace can shorten the time from the furnace to the pouring, and reduce the degree of oxidation of the molten iron by the external environment. The content of carbon in the molten iron is 3.8%, and the content of silicon is 2.3%.

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Abstract

The invention discloses an iron pattern sand-lined casting process, belonging to the technical field of casting. According to the technical problem to be solved, the invention provides an iron pattern sand-lined casting process through which the casting dimension is high in precision, the surface smoothness is high and the deformation amount is small. With the adoption of the technical scheme, the pouring temperature of molten iron is 1450 to 1600 DEG C, the pouring time is less than 60 seconds, and the stress deformation of the casting is reduced by other process conditions. The axle housing casting manufactured by adopting the process disclosed by the invention is high in surface smoothness, high in dimensional accuracy and small in deformation amount.

Description

technical field [0001] The iron mold sand-covered casting process of the invention belongs to the technical field of casting. Background technique [0002] Iron mold sand-covered casting process has good formability, clear outline, high process yield, simple process and little influence by environmental factors. Iron mold sand-covered castings have high mold strength and fast cooling speed, and are mainly used to produce products with large wall thickness and dense material requirements. This casting process is mainly used in China to produce castings such as crankshafts, brake hubs, and pump bodies. However, this kind of axle housing casting is generally long in size, with uneven wall thickness. The thinnest part is only 10 mm, and the thickest part can even reach 76 mm. There will be a large opening at the middle gear bag. The casting production of these castings by the traditional iron mold sand-covered casting process will cause serious deformation problems. Contents...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/22
CPCB22C9/22
Inventor 邓刚虎邓昊吴瑞萍
Owner SHANXI LINFEN INTEGRITY CASTING
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