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Gantry frame manufacturing process

A manufacturing process, gantry frame technology, applied in the field of gantry frame manufacturing process, can solve problems such as molten iron oxidation, splashing, excessive flow of molten iron, etc., to achieve the effect of eliminating slag inclusion, avoiding oxidation, and reducing the formation of air bubbles

Inactive Publication Date: 2014-10-08
GUANGDONG HENGCHENG TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The reason for the slag inclusion is: during the pouring process, the flow rate of the molten iron is too fast to cause splashing, resulting in serious oxidation of the molten iron

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0013] The gantry frame manufacturing process of the present invention includes the following process improvements:

[0014] 1. Set a wedge-shaped riser on the top of the casting cavity of the gantry frame to strengthen exhaust and reduce the formation of air bubbles;

[0015] 2. The casting mold of the gantry frame is divided into upper mold and lower mold. The height of the upper mold is more than 1.2 times that of the lower mold to increase the pressure of the molten metal on the upper surface of the cavity after pouring and prevent the gas pressure in the cavity from being too large. into the molten metal to further reduce the formation of bubbles;

[0016] 3. After the mold clamping is completed, the open pouring system is used to pour the molten metal to avoid oxidation during the filling process of the molten iron to eliminate slag inclusions.

[0017] By adopting the above-mentioned process improvement, the formation of defects such as air bubbles and slag inclusions ...

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Abstract

The invention discloses a gantry frame manufacturing process. As improvement, the gantry frame manufacturing process is characterized in that firstly, a riser is arranged on the top of a gantry frame casting molding chamber, so that then exhaust is enhanced, and bubbles are reduced; secondly, a gantry frame casting mold is divided into an upper mold and a lower mold, and the height of the upper mold is more than 1.2 times that of the lower mold, so that the pressure of metal liquid on the upper surface of the molding chamber after casting is increased, the situation that gas enters metal liquid due to high pressure of the gas inside the molding chamber is prevented, and bubbles are further reduced; thirdly, after the molds are combined, the metal liquid is poured by using an opened type casting system, so that the metal liquid is prevented from being oxidized when being poured so as to remove slag inclusion.

Description

technical field [0001] The invention relates to a manufacturing process of a gantry frame. Background technique [0002] In the casting process of some large gantry frames, due to the large thickness of the castings, defects such as pores and slag inclusions are prone to occur, resulting in the castings being scrapped. [0003] The reason for the generation of pores is: in the late stage of pouring and just after pouring, the gas generated by the resin and curing agent in the sand mold under the high temperature of the molten iron cannot be discharged in time, and the pressure exceeds the pressure of the molten iron and enters the molten iron to form bubbles; [0004] The reason for the slag inclusion is: during the pouring process, the flow rate of the molten iron is too fast to cause splashing, resulting in serious oxidation of the molten iron. Contents of the invention [0005] In order to overcome the deficiencies of the prior art, the invention provides a gantry fram...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/08
Inventor 王和迪
Owner GUANGDONG HENGCHENG TECH
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