Press forming method of automobile hub and matched forming mold thereof
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An automobile wheel hub and extrusion forming technology, which is applied in the direction of metal extrusion dies, etc., can solve the problems of complex process, reduce forming force, and high cost, and achieve the effects of simplifying process, reducing deformation resistance, and reducing production cost
Inactive Publication Date: 2009-03-04
HENAN UNIV OF SCI & TECH
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[0010] Extruded front rim-flared rear rim-finishing process, the purpose of adopting multiple processes is to reduce the forming force, but the process is too complicated, which makes the cost higher
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Embodiment 1
[0066] The forming method of the hot solid extruded magnesium alloy wheel hub of the present embodiment is completed by the following steps:
[0067] 1. The hub material is made of cast or rolled magnesium alloy bar, models such as AZ31B, AZ61A, AZ80A, AZ91D, MB2, MB3, MB5, MB6, MB7, MB8, MB11, MB14, MB15, ZM1, ZM5, ZM10, etc. Changing temperature conditions can also be used in the forming of aluminum alloy wheels.
[0068] 2. Use a sawing machine to cut the material according to the required size.
[0069] 3. Heating the billet in step 2, the heating temperature range is 250-420°C;
[0070] 4. Heat each mold as required. In order to realize isothermal extrusion forming, the heating temperature of the forward extrusion mold and the compound extrusion mold are consistent with the molding temperature, and the temperature of the rim flaring mold is about 250°C.
[0071] 5. Upsetting the heated blank in step 3 to the required size.
[0072] 6. Preheat the upsetting blank in ste...
Embodiment 2
[0079] The difference between this embodiment and Example 1 is that the blanks that have been upset, coated with lubricant and heated to the forming temperature are put into three sets of molds and formed sequentially, which can avoid repeated heating, save energy, realize continuous production, and improve Productivity.
Embodiment 3
[0081]The difference between this embodiment and Example 1 is: change the mold used in step 9 into a mold without die constraints ( Image 6 ), the structure of the flaring die is simplified, the cost is reduced, and the operation is convenient, which is suitable for the flaring process when the transition in the middle of the rim is relatively smooth.
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Abstract
The invention relates to an extrusion forming method for a wheel hub of an automobile, and an extrusion piece for the wheel hub is formed by adopting work division procedures isothermally. The method comprises the following steps: a biscuit which has the same outside dimension as the outside dimension of the wheel hub to be formed is taken, and is subjected to processing and forming through forward extrusion, combined extrusion and a flaring procedure in sequence, wherein the forward extrusion forms a wheel arm and enables the rest metal to be gathered evenly in the peripheral positions of the wheel arm preliminarily; the combined extrusion pre-forms a barrel-shaped wheel rim and the upper and the lower wheel flanges of the wheel rim; and the flaring process enables the wheel rim to be formed. The invention further relates to three sets of moulds, which include a forward extrusion and forming mould, a combined extrusion and forming mould and a wheel rim flaring mould. The technical proposal of the invention can reduce the forming force, save the investment of the equipment and the mould, lower the production cost, and improve the quality of forming products.
Description
technical field [0001] The invention belongs to the magnesium and aluminum alloy extrusion forming technology, in particular to an extrusion forming method of a magnesium alloy automobile wheel hub extrusion and a matching forming die. Background technique [0002] As a pillar industry of the national economy, the automobile industry develops extremely rapidly. How to limit energy consumption, improve energy utilization, and reduce waste gas emissions is particularly important for protecting the ecological environment and people's living environment. One of the most effective ways to save fuel consumption is to reduce the weight of the car. As the basic bearing part of the vehicle, the performance of the wheel hub will directly affect the driving safety, energy consumption and appearance quality of the vehicle. [0003] The aluminum alloy wheel hub has the advantages of light weight, anti-corrosion, good thermal conductivity, can reduce the temperature of the tire during us...
Claims
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