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Automobile steering device gear case transmission aluminum alloy shell and preparation method thereof

A technology of automobile steering gear and gearbox, which is applied to belts/chains/gears, mechanical equipment, transmission parts, etc. It can solve the problems of low product qualification rate, slow production cycle, waste of raw materials, etc., and achieve high product qualification rate, The effect of reducing labor intensity and reducing development costs

Inactive Publication Date: 2016-11-16
TAICANG HAIJIA VEHICLE FITTINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing steering gear casing 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 die-casting production has the following disadvantages: 1) Low production efficiency leads to poor control of the smelting process, there is no refining process of molten aluminum, and the mechanical properties of the product are not up to standard due to coarse grains; 2) The cross point of the die-casting mold arrangement structure leads to product wall thickness and porosity Large, and more surface defects

Method used

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  • Automobile steering device gear case transmission aluminum alloy shell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An aluminum alloy casing for an automobile steering gear gearbox transmission, consisting of the following components in weight percentage: 9.5% silicon, 1.0% iron, 3.5% copper, 0.18% magnesium, 0.5% zinc, 0.05% chromium, 0.15% nickel, Tin 0.27%, titanium 0.3%, lead 0.45%, manganese 0.65%, and the balance is aluminum.

[0029] The smelting furnace is heated to above 600°C, and silicon, iron, copper, magnesium, zinc, chromium, nickel, tin, titanium, lead, manganese and aluminum are added into the furnace according to the above-mentioned weight ratio. Continue to heat the above mixed material, and when the temperature of the mixed material rises to 720°C±10°C, add a three-in-one refining agent with an amount of 0.1%-0.8% of the mixed material for low-temperature refining, and use a bell jar to put the three-in-one refining agent Press into the mixed material liquid and perform circular stirring for 5-15 minutes, use 99.99% argon for degassing operation for 3-15 minutes, a...

Embodiment 2

[0033] In this embodiment, the aluminum alloy casing of the automobile steering gear gearbox transmission is composed of the following components in weight percentage: 9.5% silicon, 1.4% iron, 4.0% copper, 0.6% magnesium, 1.2% zinc, 0.14% chromium, Nickel 0.33%, tin 0.26%, titanium 0.2%, lead 0.3%, manganese 0.65%, and the balance is aluminum. .

[0034] The above-mentioned aluminum alloy casing of the automobile steering gear gearbox transmission is obtained by the same method as in Example 1.

[0035]Compared with the existing automobile steering gear gearbox transmission aluminum alloy shell products, the automobile steering gear gearbox transmission aluminum alloy casing prepared in this embodiment passes through modern simulation means (mold flow analysis), and the first pass rate of the product is 99% , After the aluminum liquid undergoes metamorphic treatment, the porosity and mechanical properties of the product are 8% better than the same product in the market, and t...

Embodiment 3

[0037] In this embodiment, the aluminum alloy casing of the automobile steering gear gearbox transmission is composed of the following components in weight percentage: 8% silicon, 1.2% iron, 2.5% copper, 0.15% magnesium, 0.5% zinc, 0.05% chromium, 0.05% nickel, 0.05% tin, 0.1% titanium, 0.1% lead, 0.05% manganese, and the balance is aluminum. .

[0038] The above-mentioned aluminum alloy casing of the automobile steering gear gearbox transmission is obtained by the same method as in Example 1.

[0039] Compared with the existing aluminum alloy casing products of automobile steering gear gearbox transmission, the aluminum alloy casing of automobile steering gear gearbox transmission prepared in this embodiment has passed modern simulation means (mold flow analysis), and the first pass rate of the product is 98%. , After the aluminum liquid undergoes metamorphic treatment, the porosity and mechanical properties of the product are 7% better than the same product in the market, a...

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Abstract

The invention relates to an automobile steering device gear case transmission aluminum alloy shell and a preparation method thereof. Raw materials of silicon, iron, copper, magnesium, zinc, chromium, nickel, tin, titanium, lead, manganese and aluminum are mixed according to the weight proportion, a product is taken out of a die-casting machine through smelting and die casting, edge cutting, manual cleaning, X flaw detection, shot blasting, ECM deburring, final cleaning and drying, final checking, packaging and delivery are carried out, and the product is obtained. By means of modern simulation means (mold flow analysis), the development cost is greatly reduced, and the product yield is high; molten aluminum is subjected to modification, porosity and the mechanical performance of the product are higher than those of the same product in the market by 5% or above, and the strength of extension breaks through 300 Mpa; and by means of the reasonable mold process design, the mold filling process of the product is stable, quality is improved, and meanwhile the service life of the mold is prolonged to a large degree. The fist pas yield of the product is 98%.

Description

technical field [0001] The invention relates to the field of die-casting, and more particularly relates to an aluminum alloy housing of an automobile steering gear gearbox transmission and a preparation method thereof. Background technique [0002] The car steering gear is a structure designed to ensure that the car needs to change its driving direction frequently according to the driver's will during driving. Automobile power steering system has developed from hydraulic power steering system to electronically controlled hydraulic steering system, and then to the current electric power steering system. The application of this technology makes the driving performance of the car reach a satisfactory level. It can make the steering light and flexible; when the car turns in the middle and high speed area, it can also ensure the optimal power magnification and stable steering feel, thereby improving the stability of high-speed driving control, reasonable adjustment of output torq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/04C22C1/02B22D17/00F16H57/032
CPCC22C21/04B22D17/00C22C1/026F16H57/032
Inventor 陈振延
Owner TAICANG HAIJIA VEHICLE FITTINGS
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