A cooling method for low-pressure casting mold of rear auxiliary casing of gearbox
A technology of low-pressure casting and cooling method, applied in the field of gearbox mold equipment, can solve the problems of low material utilization rate and slow production tact, and achieve the effect of speeding up the cooling speed, ensuring the yield, and improving the production takt
Active Publication Date: 2022-07-05
DONGFENG MOTOR CO LTD
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Problems solved by technology
At present, the low-pressure casting mold of the rear sub-housing of the gearbox generally adopts the mold method of multiple gates and multiple risers, resulting in a low material utilization rate of the product blank, which is about 75-80%, and the production cycle is slow
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[0034] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0035] like figure 1 The cooling structure of the low-pressure casting mold for the rear sub-casing of the gearbox shown in 10 includes an upper mold 100, a mold 200 and a lower mold 300. The mold 200 includes an upper flange 201, a middle wall 202, a middle mounting hole seat 203, and a lower mounting hole. The hole seat 204 and the gate 205.
[0036] The upper mold 100 includes an upper mold cooling structure, which includes a water cooling device for the upper flange, an air cooling device for the upper flange, and an internal cooling device for the lower mounting hole seat.
[0037]The upper flange water cooling device includes a plurality of upper flange water cooling pins 101 arranged at intervals on the circumferential top surface of the upper flange 201, an upper flange spot cooler 103 connected with the upper flange water cool...
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The invention discloses a cooling method for a low-pressure casting mold of a rear sub-shell of a gearbox. An upper mold cooling structure and a lower mold cooling structure are connected to the mold, the upper mold and the lower mold are closed, molten metal is poured, and an upper mold cooling structure is arranged. The cooling action timing and action time of the lower mold cooling structure and the cooling action timing and action time of the lower mold cooling structure can adjust the temperature of each part of the mold and control the solidification sequence of the molten metal in the mold. The low-pressure casting production mold for the rear sub-shell of the gearbox designed by the invention uses the sprue sleeve as the metal liquid inlet of the mold, and the conical inner sprue is formed by the upper mold shunt cone and the inner sprue insert, and there is no gating system in other parts. And the riser, the mold temperature is adjusted by designing multiple forced cooling structures on the upper mold and the lower mold, thereby controlling the solidification sequence of the molten metal in the mold during low-pressure casting, ensuring the product yield and accelerating the mold cooling speed. , to improve the product production rhythm.
Description
technical field [0001] The invention relates to the technical field of gearbox mold equipment, in particular to a cooling method for a low-pressure casting mold of a rear auxiliary casing of a gearbox. Background technique [0002] The external dimension of the rear sub-casing casting of the gearbox is 485mm×431mm×319mm, and the wall thickness of the parts is not uniform. It is difficult to form a temperature field that solidifies sequentially from top to bottom during low-pressure casting. At present, the low-pressure casting mold of the rear sub-casing of the gearbox generally adopts the mold method of multiple inner gates and multiple risers, resulting in a low material utilization rate of the product blank, about 75-80%, and a slow production cycle. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to solve the above-mentioned deficiencies of the background technology, and to provide a cooling method for the low-pressure casting mold of the rear...
Claims
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IPC IPC(8): B22D18/04B22D27/04
CPCB22D18/04B22D27/04
Inventor 李静洋魏啟金吴云波强根金徐畅程剑
Owner DONGFENG MOTOR CO LTD