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Low-pressure casting method and device for thin-wall complex aluminum alloy gearbox shell

A low-pressure casting and gearbox technology, which is applied to the low-pressure casting method and device of thin-walled complex aluminum alloy gearbox casing, and the field of casting method and device, can solve the problems of large difference in wall thickness of castings, poor forming, complex structure, etc. Reduced weight, increased area, increased heating area effect

Pending Publication Date: 2022-05-06
烟台路通精密科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a low-pressure casting method and device for a thin-walled complex aluminum alloy gearbox housing in order to solve the above problems, using a built-in inner runner sand core, heating the core pulling part, cooling the part using cooling pins, and The bolt boss adopts the comprehensive method of riser feeding, which fully realizes the sequential solidification of castings in the low-pressure casting process, and solves the problems of casting wall thickness differences, complex structures, and products that are prone to poor forming and shrinkage.

Method used

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  • Low-pressure casting method and device for thin-wall complex aluminum alloy gearbox shell
  • Low-pressure casting method and device for thin-wall complex aluminum alloy gearbox shell
  • Low-pressure casting method and device for thin-wall complex aluminum alloy gearbox shell

Examples

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Effect test

Embodiment 1

[0043] A low-pressure casting device for a thin-walled complex aluminum alloy gearbox housing, including a riser 1, a sand core 2, a gate 3 and a core puller 6, a cylindrical feeding channel 7 is opened on the sand core 2, and a Inner runner 3-1, the inner runner 3-1 is distributed along the shape of the gate 3, through the inner runner designed on the gate 3, the problem of shrinkage and porosity at the parts with large wall thickness on the end face of the casting gate is solved, The gate 3 and the sand core 2 are connected through the cooperation of the cylindrical feeding channel 7 and the inner runner 3-1, and the inner runner 3-1 communicates with the bolt column 5-1 of the casting 5.

[0044] The core pulling 6 is set on the outer side of the gate 3 and the sand core 2, the core pulling 6 is connected with the external push hydraulic cylinder, the upper mold, the lower mold, the core pulling 6, the gate 3, the riser 1 and the sand core 2 together form a casting 5 (upper...

Embodiment 2

[0056] A low-pressure casting method for a thin-walled complex aluminum alloy gearbox housing, comprising the following steps:

[0057] 1) Assembly and preheating of the casting device, the upper mold, the lower mold, the core 6 and the sand core 2 of the casting device are assembled, the upper mold and the lower mold of the mold are fixed on the 800 kg low-pressure casting machine, and the core is pulled 6 Installed on the guide rails around the lower mold, preheat the upper mold, lower mold and core-pulling (6) of the mold before casting. Gate 1, gate 3 and casting 5 are all formed by the cooperation of the alloy stock solution through the mold and sand core 2. Molding with cooperation;

[0058] 2) Raw material ratio, melting and purification treatment, select the corresponding raw materials according to the actual needs, mix the raw materials after mixing, then bake the aluminum furnace, and then put the prepared alloy raw materials into the aluminum furnace for melting ,...

Embodiment 3

[0062] A low-pressure casting method for a thin-walled complex aluminum alloy gearbox housing, comprising the following steps:

[0063] 1) Assembly and preheating of the casting device, the upper mold, the lower mold, the core 6 and the sand core 2 of the casting device are assembled, the upper mold and the lower mold of the mold are fixed on the 800 kg low-pressure casting machine, and the core is pulled 6 Installed on the guide rails around the lower mold, preheat the upper mold, lower mold and core-pulling (6) of the mold before casting. Gate 1, gate 3 and casting 5 are all formed by the cooperation of the alloy stock solution through the mold and sand core 2. Molding with cooperation;

[0064] 2) Raw material ratio, melting and purification treatment, select the corresponding raw materials according to the actual needs, mix the raw materials after mixing, then bake the aluminum furnace, and then put the prepared alloy raw materials into the aluminum furnace for melting ,...

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Abstract

The invention discloses a low-pressure casting method and device for a thin-wall complex aluminum alloy gearbox shell, and belongs to the technical field of automobile accessory manufacturing, the device comprises a dead head, a sand core, a sprue and a loose core, a cylindrical feeding channel is formed in the sand core, an inner runner is arranged on the sprue, the sprue and the sand core are connected through matching of the cylindrical feeding channel and the inner runner, and the loose core is arranged in the inner runner. The inner runner is communicated with a bolt column of a casting, the loose core is arranged on the outer side of the sprue and the outer side of the sand core, the loose core is connected with an external pushing hydraulic cylinder, and the upper die, the lower die, the loose core and the sand core jointly form a forming die of the casting. The flange bolt boss adopts the comprehensive means of riser feeding, sequential solidification of castings in the low-pressure casting process is achieved, and the problems that the wall thicknesses of the castings are greatly different, the structure is complex, and poor forming and shrinkage porosity of products are prone to occurring are solved.

Description

technical field [0001] The invention relates to a casting method and device, in particular to a low-pressure casting method and device for a thin-walled complex aluminum alloy gearbox casing, belonging to the technical field of auto parts manufacturing. Background technique [0002] At present, due to the low load and small size of the gearbox casing matched with the car engine, it is mainly produced by high-pressure aluminum alloy casting, and the structure is relatively simple; the rear casing of the automatic gearbox for heavy trucks needs to use higher mechanical strength due to its large size and high load. Alloy materials and heat treatment strengthening can meet the requirements. Large-scale thin-walled products: the overall size of the product is 562*451*308mm, and the overall side wall thickness is 5.5mm. The product structure is complex, and the local wall thickness is uneven. Position, there is a hot spot with a wall thickness of 38-59mm, which is easy to form shr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/04B22D15/02B22D18/08
CPCB22D18/04B22D15/02B22D18/08
Inventor 陈国诗姜华伟张硕刘培德李淑萍董鹏
Owner 烟台路通精密科技股份有限公司
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