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Method for shortening box retention time of heavy casting

A large-scale casting, time technology, applied in the field of casting, can solve the problems of high cost and complicated operation, and achieve the effect of accelerating cooling, saving process, and shortening press box time.

Active Publication Date: 2019-10-25
KOCEL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can not only greatly increase the cooling rate of the casting, but also realize the precise and controllable solidification and cooling process of the casting. However, this method needs to embed the cooling pipe in the sand mold in advance, which is complicated to operate and high in cost.

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  • Method for shortening box retention time of heavy casting

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Embodiment Construction

[0023] In order to illustrate the technical solution of the present invention more clearly, it will be described in detail according to the embodiments of the accompanying drawings. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without paying Under the premise of creative work, other structural forms or combinations can also be obtained according to these drawings.

[0024] The technical solution of the present invention is described in detail with the columnar casting 1 shown in the accompanying drawings.

[0025] With regard to the first part of the casting 1, operate according to the technical scheme of the present invention to shorten the pressing time, specifically:

[0026] In the first step, the temperature measurement points of the casting 1 are obtained through simulation: specifically, the highest temperature point 2, the middle temperature point 3 and the lowes...

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Abstract

The invention provides a method for shortening the box retention time of a heavy casting and belongs to the field of casting techniques. The method is used for solving the problem of long retention time of the heavy casting in a box. The method includes the following steps that S01, a temperature measuring point is determined, mold filling simulation is carried out on a casting cavity of the casting by using analog simulation technology, the maximum temperature point, the minimum temperature point and the medium temperature point in the casting cavity are found out, and at least one temperature sensor is placed at the maximum temperature point, the minimum temperature point and the medium temperature point; and S02, mist cooling is conducted, the complete solidification cooling time at themaximum temperature point, the minimum temperature point and the medium temperature point of the casting is found out by using the analog simulation technology and correspondingly recorded, when themaximum temperature point, the minimum temperature point and the medium temperature point are completely solidified and risers are also completely solidified, the current time is recorded as first boxretention time, at the moment, mist is sprayed over the completely solidified risers, mist cooling is carried out on the upper parts of the risers, and cooling is transferred to the casting through the risers to accelerate cooling of the casting and shorten the box retention time.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a method for shortening the time for pouring castings into pressure boxes. Background technique [0002] After the casting is poured, it takes a certain amount of time for the liquid metal state to change into a fixed metal. Especially for large castings, the cooling rate in the sand mold is slow, especially when the temperature is lower than 600 ° C, the condensation rate is extremely slow. This is because: 1) The temperature difference between the casting and the sand mold is getting smaller and smaller; 2) The sand mold in contact with the surface of the casting collapses and falls, resulting in an air layer between the casting and the sand mold. In this case, if you wait for all parts of the casting to completely solidify and cool down to below 200°C, it will take more than 10 days. During this period of time, castings are at a standstill, which has a great impact on casting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D27/06
CPCB22D27/06
Inventor 张龙江纳建虹苏少静
Owner KOCEL EQUIP