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Casting mold and casting process of gearbox body

A casting process and casting mold technology, which are applied in the field of casting molds and casting processes of gearbox casings, can solve the problems of large temperature drop in the cavity, easy shrinkage at the transition, and insufficient gate height, and improve the casting process. The effect of insufficient mouth height, reducing rough machining and improving machining accuracy

Active Publication Date: 2019-01-11
四川省犍为恒益铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of easy shrinkage and even shrinkage cracking at the transition due to the large difference in wall thickness in the casting process of the existing gearbox casing, the purpose of the present invention is to provide a casting mold for the gearbox casing, which can effectively improve the casting mold. The mouth height is not enough, the pressure provided by the feeding system is insufficient, resulting in a large temperature drop in the cavity area, fully improving the fluidity of the aluminum alloy solution, and preventing the transition from shrinkage and cracking at the transition point where the wall thickness of the gearbox case changes sharply. Problems leading to product leakage and scrapping

Method used

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  • Casting mold and casting process of gearbox body
  • Casting mold and casting process of gearbox body
  • Casting mold and casting process of gearbox body

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Embodiment 1

[0038] Please refer to figure 1 , figure 2 with image 3 As shown, this embodiment provides a casting mold for a gearbox case, including an upper mold 1, a lower mold 2, and a casting cavity 3 formed by the cooperation of the upper mold 1 and the lower mold 2, and the upper end of the upper mold 1 passes through the pad 4 An upper mold connecting plate 5 is installed, and an ejection mechanism is arranged between the upper mold connecting plate 5 and the upper mold 1. The ejecting mechanism includes a thimble fixing plate 8 and a plurality of thimbles evenly installed on the thimble fixing plate 8, and a plurality of thimbles It is detachably connected with the thimble fixing plate 8 threads, and the thimble fixing plate 8 is provided with threaded holes for thimble installation; in the upper mold 1, there are thimble through holes 9 corresponding to a plurality of thimbles, and the plurality of thimble through holes 9 The diameters are all 11 to 13 mm, and the diameter of ...

Embodiment 2

[0045] Please combine figure 1 , figure 2 with image 3 As shown, the present embodiment provides a casting process of a gearbox case, and the casting mold of the gearbox case in the above-mentioned embodiment 1 is used to cast the LYP315.2 driving gearbox case, which is composed of the following by weight percentage Made of aluminum alloy with composition: Si: 6.5%, Mg: 0.3%, Ti: 0.1%, Cu: 2.1%, Mn: 0.2%, Fe: 0.65%, Ni: 0.25%, Zn: 0.08%, Pb : 0.15%, Sn: 0.05%, Cr: 0.12%, the balance is Al and unavoidable impurities. The casting process specifically includes the following process steps:

[0046] Step (a): batching, according to the above-mentioned component batching, select the corresponding elemental raw material and Al for batching;

[0047] Step (b): Alloy smelting, drying the aluminum furnace, putting the metal alloy prepared in step (a) into the aluminum furnace for melting, the melting temperature is 780°C, and performing refining, deoxidation, and slag removal proce...

Embodiment 3

[0057] Please combine figure 1 , figure 2 with image 3As shown, the present embodiment provides a casting process of a gearbox case, and the casting mold of the gearbox case in the above-mentioned embodiment 1 is used to cast the LYP315.2 driving gearbox case, which is composed of the following by weight percentage Made of aluminum alloy with composition: Si: 7.5%, Mg: 0.4%, Ti: 0.2%, Cu: 3.5%, Mn: 0.5%, Fe: 0.55%, Ni: 0.15%, Zn: 0.06%, Pb : 0.12%, Sn: 0.08%, Cr: 0.15%, the balance is Al and unavoidable impurities, the casting process specifically includes the following process steps:

[0058] Step (a): batching, according to the above-mentioned component batching, select the corresponding elemental raw material and Al for batching;

[0059] Step (b): Alloy smelting, drying the aluminum furnace, putting the metal alloy prepared in step (a) into the aluminum furnace for melting at a melting temperature of 790°C, and performing refining, deoxidation, and slag removal proces...

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Abstract

The invention discloses a casting mold and a casting process of a gearbox body, and relates to the technical field of aluminum alloy casting. The problem that in an existing gearbox body casting process, due to the fact that the wall thickness is large, a transition position is easy to loosen, and even crack can be solved. The casting mold comprises an upper mold, a lower mold and a casting mold cavity formed by cooperating the upper mold and the lower mold, a static insert matched with the shape of the gearbox body is arranged on the inner side of the upper mold, and a runner water inlet is formed in the lower mold; a low-pressure casting process is adopted, the process comprises the following steps of burdening, alloy smelting, alloy solution transferring into low-pressure casting machine, mold preparing, pressure casting, mold opening and alloy taking. By means of the technical scheme, the liquidity of the aluminum alloy solution in the casting mold cavity can be fully improved, theproblems that due to the fact that the wall thickness of the gearbox body is large, looseness and cracking are easy to occur at the transition position are solved, a product qualification rate reaches 95.9% or above, the machining precision of a casting product can be remarkably improved, and subsequent rough machining cost of the casting is reduced.

Description

technical field [0001] The invention relates to the technical field of gearbox casting, and more specifically relates to a casting mold and a casting process for a gearbox case. Background technique [0002] The gearbox case is one of the basic parts of driving. It connects the shafts and gears in the gearbox as a whole, and plays the role of support and connection in the entire transmission assembly, so that these parts and mechanisms are kept in the correct relative position. Position, so that the various mechanisms and parts on it can work correctly and coordinately, it should have sufficient strength and rigidity, the quality of the gearbox body will directly affect the accuracy of the position of the shaft and gear and other parts, and then affect the driving Transmission performance and lifespan. [0003] The Chinese patent with the notification number CN204194723U discloses a box mold for a gearbox housing, which includes a dynamic half mold and a static half mold. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/04C22C21/02
CPCB22D18/04C22C21/02
Inventor 唐顺清黄志伟宋权
Owner 四川省犍为恒益铝业有限公司
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