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Sintering-deforming-prevention hollow structure differential mechanism shell machining method

A processing method and differential gear technology, applied in the field of automotive reducers, can solve problems such as deformation of sintered products, difficulty in achieving high precision, easy deformation of side walls, etc., and achieve the effect of ensuring accuracy requirements

Active Publication Date: 2020-06-09
DONGGUAN HUAJING POWDER METALLURGY
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Problems solved by technology

[0002] The automobile differential can make the left and right (or front and rear) drive wheels rotate at different speeds. It is mainly composed of left and right side shaft gears, two planetary gears and a shell for supporting and fixing. The differential shell is usually used MIM (Metal Injection Molding Technology) is used for processing. However, in order to ensure the installation space of the gears, the existing differential case is usually hollow. The structure is easy to cause the side wall of the cavity in the differential case to be easily deformed, resulting in serious deformation of the final sintered product, and it is difficult to achieve the high precision required by the design

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  • Sintering-deforming-prevention hollow structure differential mechanism shell machining method
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  • Sintering-deforming-prevention hollow structure differential mechanism shell machining method

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Embodiment Construction

[0016] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0017] Such as figure 2 Shown, a kind of anti-sintering deformation hollow structure differential housing processing method has the following steps:

[0018] first step, such as figure 1 As shown, when carrying out the structural design of the differential case 1, the support column 12 is provided in the easily deformable area in the hollow cavity 11 of the differential case 1, and the two ends of the support column 12 are respectively connected to the sides of the hollow cavity 11. Wall contact connection; specifically, when designing the structure of the differential case 1, the support column 12 is placed horizontally in the middle of the easily deformable area in the hollow cavity 11 and is cylindrical, and the easily deformable area can be judged in the unsupported Under the design of the co...

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Abstract

The invention discloses a sintering-deforming-prevention hollow structure differential mechanism shell machining method, and belongs to the technical field of car transmission mechanisms. When a differential mechanism shell structure is designed, a supporting column is mounted in an area prone to deforming in a hollow cavity of a differential mechanism shell, the two ends of the supporting columnare in contact connection with the side walls of the hollow cavity, through a metal injection molding machine, the differential mechanism shell with the supporting column is formed through injection,the differential mechanism shell obtained after injection molding is fed into a vacuum furnace through putting and degreasing operation to be sintered, finally, the supporting column in the hollow cavity of the differential mechanism shell after injection molding is cut off, and the supporting column is used for supporting the side wall, pone to deforming, of the hollow cavity. Therefore, it can be ensured that when a differential mechanism is sintered, the differential mechanism is not prone to deforming, and product precision needs are ensured.

Description

technical field [0001] The invention relates to the technical field of automobile speed reducers, and more specifically, to a processing method for a hollow structure differential case that prevents sintering deformation. Background technique [0002] The automobile differential can make the left and right (or front and rear) drive wheels rotate at different speeds. It is mainly composed of left and right side shaft gears, two planetary gears and a shell for supporting and fixing. The differential shell is usually used MIM (Metal Injection Molding Technology) is used for processing. However, in order to ensure the installation space of the gears, the existing differential case is usually hollow. The structure easily leads to deformation of the side wall of the cavity in the differential case, which leads to severe deformation of the final sintered product, making it difficult to achieve the high precision required by the design. Contents of the invention [0003] In order...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/22B22F3/10B22F5/10
CPCB22F3/225B22F3/1007B22F5/10B22F2003/1046
Inventor 杨求显
Owner DONGGUAN HUAJING POWDER METALLURGY
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