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Method for overcoming rarefaction defect of case shell casting

A technology of castings and shells, applied in the direction of casting molds, casting mold components, casting molding equipment, etc., can solve the problems of time-consuming and labor-consuming, low qualified rate of finished products, etc., reduce labor intensity, high-quality finished products, and avoid loose defects Effect

Inactive Publication Date: 2017-02-01
GUIZHOU ANJI AVIATION PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for solving the loose defects of casing casing castings, so as to solve the problem of loose defects in the installation platform in the production process of the casing casing castings in the field of investment casting, the need for repair welding, and the process consumption. Problems of time-consuming and labor-intensive, low pass rate of finished products

Method used

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  • Method for overcoming rarefaction defect of case shell casting
  • Method for overcoming rarefaction defect of case shell casting
  • Method for overcoming rarefaction defect of case shell casting

Examples

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Embodiment 1

[0022] When designing the casting mold, a center hole 6 is opened in the center of the mounting table 4, such as figure 2 As shown; according to the diameter of the center hole 6, a cylindrical inner cooling iron 7 is processed, and the length of the inner cooling iron 7 is 20mm larger than the thickness of the mounting table 4; the casting wax mold is pressed with a mold; the inner cooling iron 7 is inserted into the wax mold for installation In the center hole 6 of the table 4, the two ends of the inner cooling iron 7 are symmetrically arranged on both sides of the center hole 6, such as image 3 As shown; the wax mold is bonded and poured according to the process, the shell is made of paint, smelted, and poured; after passing the test, the installation hole is reamed at the center hole 6, and the inner diameter of the center hole 6 is 3mm smaller than the inner diameter of the installation hole.

Embodiment 2

[0024] When designing the casting mold, a center hole 6 is opened in the center of the mounting table 4, such as figure 2 As shown; according to the diameter of the center hole 6, a cylindrical inner cooling iron 7 is processed, and the length of the inner cooling iron 7 is 10mm larger than the thickness of the mounting table 4; the casting wax mold is pressed with a mold; the inner cooling iron 7 is inserted into the wax mold for installation In the center hole 6 of the table 4, the two ends of the inner cooling iron 7 are symmetrically arranged on both sides of the center hole 6, such as image 3 As shown; the wax mold is bonded and poured according to the process, the shell is made of paint, smelted, and poured; after passing the test, the center hole 6 is reamed to process the installation hole, and the inner diameter of the center hole 6 is 2mm smaller than the inner diameter of the installation hole.

Embodiment 3

[0026] When designing the casting mold, a center hole 6 is opened in the center of the mounting table 4, such as figure 2 As shown; according to the diameter of the center hole 6, a cylindrical inner cooling iron 7 is processed, and the length of the inner cooling iron 7 is 16mm larger than the thickness of the mounting table 4; the casting wax mold is pressed with a mold; the inner cooling iron 7 is inserted into the wax mold for installation In the center hole 6 of the table 4, the two ends of the inner cooling iron 7 are symmetrically arranged on both sides of the center hole 6, such as image 3 As shown; the wax mold is bonded and poured according to the process, the shell is made of paint, smelted, and poured; after passing the test, the installation hole is reamed at the center hole 6, and the inner diameter of the center hole 6 is 2.5mm smaller than the inner diameter of the installation hole. .

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Abstract

The invention discloses a method for overcoming a rarefaction defect of a case shell casting. According to the method, an internal chill is arranged in the centre of a mounting table; the internal chill is utilized for chilling to change a temperature field of the mounting table, so that the mounting table is solidified before a neck, and is solidified in the sequence of forming the mounting table, the neck and a riser; the temperature field of a hot node of the mounting table is changed by utilizing the internal chill; the sequential solidification of the casting is realized; the rarefaction defect can be effectively avoided; repeated repairing welding is not required to be performed; the labour intensity of a worker can be effectively reduced; the production efficiency can be improved; in addition, the finished products produced by adopting the method is high in yield and high in quality.

Description

technical field [0001] The invention relates to the field of investment casting technology, in particular to the field of smelting and pouring of casing casing castings, and in particular to a method for solving loose defects of casing casing castings. Background technique [0002] figure 1 It is a picture of the casing shell casting and the wax model. The number 1 in the figure is the installation platform. There are three installation platforms 1 on the casing casing. Set up a riser for feeding, however, the end face 4 of the mounting table 1 cannot be provided with a riser due to the narrow space; it is easy to form a necking 5 due to the influence of the oil tank 2, that is, the thickness of the necking 5 is smaller than that of the mounting table 1, and the pouring When casting, the constriction 5 will solidify before the mounting table 1, the riser 3 cannot effectively feed the mounting table 1, and the mounting table 1 has loose defects beyond the standard, and it ne...

Claims

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Application Information

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IPC IPC(8): B22C9/22B22C9/04B22D27/04
CPCB22C9/22B22C9/04B22D27/04
Inventor 潘年锋
Owner GUIZHOU ANJI AVIATION PRECISION CASTING