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Anti-deformation method of flat casting

A technology of anti-deformation and casting, which is applied in the field of sand casting and can solve problems such as wall thickness difference and deformation

Active Publication Date: 2013-02-27
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defects that the existing flat-plate castings with large plane structure are easily deformed under the influence of factors such as the weak part with large wall thickness difference, the heat-affected zone of final solidification, the shrinkage force of the casting, and the non-fixed core during casting or heat treatment , the present invention provides a kind of anti-deformation method of flat castings, by setting process support columns, anti-bending ribs, process bumps in the process of casting castings, and then performing deformation correction after castings are formed to obtain qualified castings, the specific process steps are as follows:

Method used

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Embodiment Construction

[0015] The anti-deformation method for flat-plate castings provided by the invention is aimed at such as figure 1 For the easily deformable part 1 of the casting with the structure shown, the specific process steps of anti-deformation implemented are as follows:

[0016] 1) Set two process support columns 3 in the hollow position in the middle of the casting, the height of which is flush with the large plane of the casting. The diameter of the process support column 3 is selected according to the size of the casting to ensure sufficient bending strength to prevent the casting from forming a center during rough machining or heat treatment. Collapse, observe the gap between all process support columns 3 and the platform after heat treatment, and remove them after machining without deformation;

[0017] 2) Set the anti-bending rib 2 on the outer surface of the easily deformable part of the casting. The thickness of the anti-bending rib 2 is taken from the basic skeleton size of ...

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Abstract

The invention relates to an anti-deformation method of a flat casting. By arranging one or several technological shores, bending-resistant ribs, and technological salient points during casting, and through deformation automatic correction after shaping of a casting, the method can produce the qualified casting. The anti-deformation measure of the method and the casting shaping in one body occur simultaneously, with no need for manual cold correction or hot correction. Meanwhile, a fluorescence or coloring inspection after correction can be omitted, thus greatly reducing the cost and enhancing the casting qualification rate.

Description

technical field [0001] The invention belongs to the technical field of sand casting, in particular to a method for preventing deformation of flat castings. Background technique [0002] Castings with large plane structures are prone to deformation during casting and heat treatment, and the degree of deformation is serious. The conventional technical method is to use auxiliary tooling fixtures to prevent casting deformation, but there are problems such as high cost of manufacturing fixtures and prolonging the production delivery cycle. Calibration also has unfavorable operating factors in high-temperature environments, operational errors, hidden dangers of cracks, etc. Cold calibration or thermal calibration must ensure a certain degree of technical proficiency and at the same time assist the fluorescence or coloring inspection process, the pass rate is low. Contents of the invention [0003] Aiming at the defects that the existing flat-plate castings with large plane struc...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/00
Inventor 张丙岩
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION