Process for manufacturing magnesium alloy wheel and process for manufacturing wheel rim of magnesium alloy wheel

Abstract

The invention relates to a process for manufacturing a magnesium alloy wheel and a process for manufacturing a wheel rim of the magnesium alloy wheel, which comprises: a step of hot extrusion, namely making a sectional material into a more than half ellipse shaped wheel rim semi-finished product in a longitudinal forming device through hot bending; a step of fully rounding, namely rolling the elliptic wheel rim semi-finished product into a full round shape by a rolling circle device, performing further pressurization and rounding on the full-circle wheel rim semi-finished product by a pressure device after performing a preparation process of welding, and finally performing the welding; and a step of air hole processing, namely processing air holes for setting inflating valves. The process for manufacturing the magnesium alloy wheel is further characterized by comprising: a step of plate blanking, namely manufacturing a circular plate and forming a center hole on the circular plate through hot stamping; a step of hot stretch forming, namely performing hot stretch on the circular plate for scheduled times; a step of hot stamping, namely forming a connecting structure and a heat sinking structure on the wheel rim semi-finished product through the hot stamping; and a step of performing a process of gang welding, namely assembling the wheel rim and a wheel spoke into a wheel.

Description

technical field

[0001] The invention relates to a manufacturing process of an automobile wheel and a manufacturing process of the wheel rim. Background technique

[0002] At present, aluminum-magnesium alloy wheels produced by die-casting methods occupy a dominant position in the wheel market. Because wrought magnesium alloy materials are not easy to be stamped at room temperature and are extremely brittle, they are rarely used in wheel production. However, the wrought magnesium alloy products produced by hot extrusion or hot drawing processes have higher strength, better ductility, and excellent performance that cannot be replaced by cast magnesium alloy wheels. The mechanical properties of the wheels produced by extrusion and stretching are much higher than those produced by die-casting, and the surface is smooth, no need to be polished, the material is saved, and the weight is lighter. After surface treatment, it will have excellent Corrosion, abrasion, chemical and hea...

Examples

no. 1 example

[0028] The wheel rim manufacturing process of the present invention mainly includes: a hot extrusion step, a rounding step and a pore processing step.

[0029] In the hot extrusion step, the magnesium alloy bar is first cut off to a fixed length, referring to figure 2 a. Then in a set of hot extrusion dies (section forming device), the magnesium alloy bar is extruded into a rim semi-finished product. Specifically, the magnesium alloy bar is hot extruded into a profile with a predetermined section, and then in a longitudinal forming device such as Formed on the arc track as figure 2 The large half of the elliptical rim shown in b, the elliptical rim here mainly refers to a shape close to an ellipse or an elliptical rim, for example, figure 2 The two ends of the rim semi-finished product shown in b are rolled on a small circular track, and the middle is rolled on a large circular track, or the rim semi-finished product is directly bent on an elliptical track. The aforement...

no. 2 example

[0033] The magnesium alloy wheel manufacturing process of the present invention mainly includes a wheel rim manufacturing process, a wheel spoke manufacturing process and a combined welding process.

[0034] The rim manufacturing process can be implemented with reference to the aforementioned first embodiment.

[0035] The spoke manufacturing process mainly includes a plate blanking step, a hot stretch forming step and a hot stamping step. The steps of sheet blanking are as follows: image 3 As shown, heat the plate to 280°C-350°C, and then punch out the circular plate and the center hole on the plate. The thermo-stretch forming step includes two thermo-stretch steps in this embodiment, respectively as Figure 4 with Figure 5 As shown, of course, different heat-stretching steps can be selected for different spoke shapes. The heat-stretching step is, for example, heating and stretching on a 200-ton double-action press, and the stretching temperature is between 280°C and 350...

technical field

[0001] The invention relates to a manufacturing process of an automobile wheel and a manufacturing process of the wheel rim. Background technique

[0002] At present, aluminum-magnesium alloy wheels produced by die-casting methods occupy a dominant position in the wheel market. Because wrought magnesium alloy materials are not easy to be stamped at room temperature and are extremely brittle, they are rarely used in wheel production. However, the wrought magnesium alloy products produced by hot extrusion or hot drawing processes have higher strength, better ductility, and excellent performance that cannot be replaced by cast magnesium alloy wheels. The mechanical properties of the wheels produced by extrusion and stretching are much higher than those produced by die-casting, and the surface is smooth, no need to be polished, the material is saved, and the weight is lighter. After surface treatment, it will have excellent Corrosion, abrasion, chemical and hea...

Examples

no. 1 example

[0028] The wheel rim manufacturing process of the present invention mainly includes: a hot extrusion step, a rounding step and a pore processing step.

[0029] In the hot extrusion step, the magnesium alloy bar is first cut off to a fixed length, referring to figure 2 a. Then in a set of hot extrusion dies (section forming device), the magnesium alloy bar is extruded into a rim semi-finished product. Specifically, the magnesium alloy bar is hot extruded into a profile with a predetermined section, and then in a longitudinal forming device such as Formed on the arc track as figure 2 The large half of the elliptical rim shown in b, the elliptical rim here mainly refers to a shape close to an ellipse or an elliptical rim, for example, figure 2 The two ends of the rim semi-finished product shown in b are rolled on a small circular track, and the middle is rolled on a large circular track, or the rim semi-finished product is directly bent on an elliptical track. The aforement...

no. 2 example

[0033] The magnesium alloy wheel manufacturing process of the present invention mainly includes a wheel rim manufacturing process, a wheel spoke manufacturing process and a combined welding process.

[0034] The rim manufacturing process can be implemented with reference to the aforementioned first embodiment.

[0035] The spoke manufacturing process mainly includes a plate blanking step, a hot stretch forming step and a hot stamping step. The steps of sheet blanking are as follows: image 3 As shown, heat the plate to 280°C-350°C, and then punch out the circular plate and the center hole on the plate. The thermo-stretch forming step includes two thermo-stretch steps in this embodiment, respectively as Figure 4 with Figure 5 As shown, of course, different heat-stretching steps can be selected for different spoke shapes. The heat-stretching step is, for example, heating and stretching on a 200-ton double-action press, and the stretching temperature is between 280°C and 350...

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