Aluminum alloy wheel spoke extrusion chamfering die and chamfering machining method

Abstract

The invention discloses an aluminum alloy wheel spoke extruding and chamfering die and a chamfering machining method.The extruding and chamfering die comprises a lower positioning mechanism used for containing a wheel and an upper stamping mechanism used for conducting stamping and chamfering on an air hole; the lower positioning mechanism comprises a lower positioning table, at least one air hole positioning disc, an outer ring positioning die used for positioning the outer ring of the wheel and an inner positioning die used for positioning air holes, the outer ring positioning die is fixedly installed on the lower positioning table, and the inner ring of the outer ring positioning die is provided with the inner positioning die in a rotating fit mode. And a group of inner mold positioning through holes are formed in the inner positioning mold. According to the method, the edges of the air holes are punched, so that a chamfer or fillet structure is punched, the internal tissue of the chamfer or fillet is compact, a work-hardened layer is arranged on the surface layer, and the fatigue life is greatly prolonged; and air holes with different numbers and different positions can be chamfered, the adaptability is better, and the overall use cost of the die is relatively low.

Description

technical field [0001] The invention relates to the technical field of wheel chamfering processing, in particular to an aluminum alloy wheel spoke extrusion chamfering die and a chamfering processing method. Background technique [0002] The forged aluminum alloy wheels of commercial vehicles such as trucks and buses are usually provided with air holes on the end face of the hub. The air holes are usually formed by drilling holes in the machining center. Less than 0.5mm chamfer. After the wheel is assembled to the vehicle, during the long-term use, the sharp edge is the stress concentration area, and the load of the commercial vehicle is very large, which causes the wheel to easily produce fatigue cracks at the sharp edge position, which cannot meet the life requirements of the vehicle. . Since the wheel is both an appearance part and a safety part, fatigue cracks may occur at this edge position during the life period, and there are potential safety hazards. [0003] Ther...

AI Technical Summary

Problems solved by technology

After the wheel is assembled to the vehicle, during long-term use, the sharp edge is a stress concentration area, and the load of the commercial vehicle is very large, which makes the wheel prone to fatigue cracks at this sharp edge, which cannot meet the life requirements of the vehicle.

Since the wheel is both an appearance part and a safety part, fatigue cracks may occur at this edge position during the service life, and there are also potential safety hazards

[0003] Therefore, it is urgent to solve this problem. Here, if a large chamfer or fillet structure is processed by machining, the stress concentration can be reduced and the risk level can be reduced. However, the machining method is a processing method for removing materials, and the processing process is relatively More cumbersome, more time-consuming, and limited fatigue life improvement after processing

[0004] In addition, the number and size of air holes will vary according to different design requirements. The number of air holes is designed in an even number, and the specific number is generally between 6-12. Sometimes, on different types of wheels, the position of the air holes There will also be differences, and the cost of the mold is high. Appropriate parameter modification requires redesigning and manufacturing a new mold, which greatly increases the manufacturing cost of the wheel product.

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