The Method of Shortening the Pressing Time of Large Castings
A large-scale casting and time-saving technology, applied in the field of casting, can solve the problems of complex operation and high cost, and achieve the effects of saving process, accelerating cooling and shortening the pressing time
Active Publication Date: 2021-06-08
KOCEL EQUIP
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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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[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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A method for shortening the pressing time of large castings, belonging to the field of casting technology, used to solve the problem of long pressing time of castings, comprising the following steps: S01, determining the temperature measurement point: using simulation technology to simulate the filling of the casting cavity , finding the highest temperature point, the lowest temperature point and the middle temperature point in the casting cavity; and placing at least one temperature sensor at each of the highest temperature point, the lowest temperature point and the middle temperature point. S02, water mist cooling: use simulation technology to find out the complete solidification cooling time at the highest temperature point, the lowest temperature point and the middle temperature point of the casting, and make corresponding records; After the temperature point is completely solidified, and the riser is also completely solidified, record this time as press time 1; at this time, spray water mist above the completely solidified riser, spray and cool the upper part of the riser, and transfer the cooling through the riser To the castings to accelerate the cooling of the castings and shorten the pressure box 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...
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IPC IPC(8): B22D27/06
CPCB22D27/06
Inventor 张龙江纳建虹苏少静
Owner KOCEL EQUIP