Preparation method of automotive transmission housing

Abstract

The invention discloses a preparation method of an automotive transmission housing. The method comprises the following steps: preparing metal materials into a metal plate according to the weight percentage; after placing the metal plate into a smelting furnace and heating the the metal plate to first preset temperate, reducing the temperature to second preset temperature and refining a metal plate in a super-plastic state, wherein a refining modificator is added into the smelting furnace; pressing and fixing the metal plate in the super-plastic state in a mold system on a die-casting machine, enabling the metal plate in the super-plastic state to slowly deform under the action of 10 sections of injection speeds of the die-casting machine till the metal plate is formed, is full and is completely attached into a mold cavity in the mold system, wherein the mold system is provided with one or at least two molds; converting the metal plate in the super-plastic state into a solid metal plate to form the automotive transmission housing, opening the molds and taking out the automotive transmission housing. According to the technical scheme provided by the invention, grains of the metal plate in the super-plastic state are guaranteed to be fine, and further, the automotive transmission housing with higher mechanical properties is formed.

Description

technical field [0001] The invention relates to the technical field of automobile production, in particular to a method for preparing an automobile transmission housing. Background technique [0002] Automobile steering gear is a structure designed to ensure that the vehicle needs to change its driving direction frequently according to the will of the driver during driving. The automobile power steering system has evolved from hydraulic power steering system to electronically controlled hydraulic steering system, and then developed to the current electric power steering system. , the application of this technology makes the driving performance of the car reach a satisfactory level, so when the car is running at a low speed, the steering can be light and flexible; The magnification and stable steering feel improve the stability of high-speed driving control, and the output torque is reasonably adjusted to save fuel consumption. The structure and material of the steering gear...

AI Technical Summary

Problems solved by technology

[0003] The existing steering gear housing has a single product process control and is prone to defects

The disadvantages of gravity casting are: 1) It is difficult to feed the product, and it is easy to form loose or shrinkage defects, resulting in a low product qualification rate; 2) The weight of the product is much larger than the weight of the die-casting process, resulting in waste of raw materials; 3) The production cycle is slow and cannot meet Capacity requirements

The current disadvantages of die-casting production: 1) Low production efficiency leads to poor control of the smelting process, there is no refining process of molten aluminum, and the coarse grains lead to substandard mechanical properties of the product; 2) The intersection of the die-casting mold arrangement structure leads to product wall thickness and large pores. and surface defects

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