Grinder shell cover casting method

A technology of end caps and mills, which is applied in the direction of casting molding equipment, casting molds, and casting mold components, and can solve the problems of not very strong cooling iron effect and small wall thickness

Inactive Publication Date: 2008-03-05
CITIC HEAVY INDUSTRIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (2) It is the hot section area of ​​the end cover casting, which is prone to internal defects and surface cracks;
[0006] (3) Defects are mostly buried under the skin of the fillet area of ​​the steel casting, partly exposed on the surface af...

Method used

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  • Grinder shell cover casting method

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Embodiment Construction

[0021] As shown in Figures 1 and 2, the casting method of the mill end cover described above is as follows: when the small end of the end cover (4) has an outer flange (3), the rounded corners of the end cover are indirectly cooled The iron (2) adopts block structure; when the small end of the end cover (4) has an inner flange (5), the rounded corners of the end cover indirect external chill iron (2) and the journal chill iron adopt an integral structure. The design method of the rounded indirect external chiller of the end cover is as follows: the width of the chiller exceeds the lower end of the fillet arc by more than 50mm to ensure the quality of the casting. Since the diameter of the hot node circle in the fillet area generally exceeds 280mm, the indirect external chiller is adopted. Cold iron, the thickness of the cold iron hanging sand layer is 10mm-20mm; the thickness of the cold iron in the fillet area of ​​​​the end cover is 0.6-0.8 times the diameter of the hot joint...

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Abstract

The present invention discloses method of casting end cap for mill. The present invention can ensure high casting quality by means of connecting external chill in thickness of 0.6-0.8 time the hot pitch circle diameter, applying the external chill with sand layer of 10-15 mm thickness, inwards shifting the hot pitch circle in the round corner region to avoid microscopic shrinkage to affect magnetic particle inspection, and ensuring the shrink passage with proper divergence angle for solidification in the order from far parts to the sink head.

Description

Technical field: [0001] The invention relates to the technical field of mill equipment manufacture, in particular to a casting method of a mill end cover. Background technique: [0002] The material of the end cover of the mill is low-carbon cast steel, which has a wide range of solidification temperature and poor casting performance. Its solidification characteristics determine that castings are prone to defects such as shrinkage cavities and micro-shrinkage porosity. [0003] According to the working nature of the mill and the structural characteristics of the end cover itself, it can be seen that the end cover is the main bearing part of the mill. During the work, the weight of the mill and the weight of the material are supported by the journals of the end covers at both ends. The casting quality requirements are particularly strict, and the main defects that are prone to occur during the working process of the fillet area of ​​​​the end cover and the main defects are: ...

Claims

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Application Information

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IPC IPC(8): B22C9/00
Inventor 赵永让岳宗格陈书山周翔
Owner CITIC HEAVY INDUSTRIES CO LTD
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