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Casting mold and casting process for gearbox case

A casting process and casting mold technology are applied in the field of casting molds and casting processes of gearbox casings, which can solve the problems of large temperature drop in the cavity, product leakage and scrap, easy shrinkage at the transition, etc., so as to improve the gate. Insufficient height, high machining accuracy, reducing the effect of rough machining

Active Publication Date: 2020-06-05
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 for gearbox case
  • Casting mold and casting process for gearbox case
  • Casting mold and casting process for gearbox case

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Please refer to figure 1 , figure 2 and 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. The upper end of the upper mold 1 passes through a spacer 4 An upper die connecting plate 5 is installed, and an ejector mechanism is provided between the upper die connecting plate 5 and the upper die 1. The ejector mechanism includes a thimble fixing plate 8 and a plurality of thimbles evenly installed on the thimble fixing plate 8. It is detachably connected with the thimble fixing plate 8, and the thimble fixing plate 8 is provided with a threaded hole for the thimble to be installed; The diameters are all 11 to 13 mm, and the diameter of the plurality of thimble through holes 9 in this embodiment is preferably 12 mm; and the upper die connecting plate 5 and the upper die 1 are fixedly connected with a sleeve colum...

Embodiment 2

[0045] please combine figure 1 , figure 2 and image 3 As shown in the figure, this embodiment provides a casting process for a gearbox case. The casting mold of the gearbox case in the above-mentioned embodiment 1 is used to cast the LYP315.2 traveling gearbox case. 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 inevitable impurities, the casting process specifically includes the following process steps:

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

[0047] Step (b): alloy smelting, the aluminum furnace is baked, and the metal alloy prepared in step (a) is put into the aluminum furnace for smelting, and the melting temperature is 780 ° C, and refining, deoxidation, and slag removal are carried out. , refining alloy solution;

[0048] ...

Embodiment 3

[0057] please combine figure 1 , figure 2 and image 3 As shown in the figure, this embodiment provides a casting process for a gearbox case. The casting mold of the gearbox case in the above-mentioned embodiment 1 is used to cast the LYP315.2 traveling gearbox case. 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 inevitable impurities, the casting process specifically includes the following process steps:

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

[0059] Step (b): alloy smelting, the aluminum furnace is baked, and the metal alloy prepared in step (a) is put into the aluminum furnace for smelting, and the smelting temperature is 790 ° C, and refining, deoxidation, and slag removal are carried out. , refining alloy solution;

[0060]...

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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 particularly to a casting mold and a casting process for a gearbox casing. Background technique [0002] The gearbox case is one of the basic parts of driving, which connects the shafts and gears in the gearbox as a whole, and plays a supporting and connecting role in the entire gearbox assembly, so that these parts and mechanisms maintain the correct relative relationship. position, so that the various mechanisms and parts on it can work correctly and harmoniously, and 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, which in turn affects the driving. Transmission performance and longevity. [0003] The Chinese patent with the publication number of CN204194723U discloses a box mold for a gearbox casing, including a movable half-mold and a static half-mold. A mov...

Claims

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Application Information

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Patent Type & Authority Patents(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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