Process and device for forming magnesium alloy loading wheel disc through combined extruding in radial direction and reverse direction

Abstract

The invention discloses a process and a device for forming a magnesium alloy loading wheel disc through combined extruding in the radial direction and the reverse direction. According to the process and the device, the performance requirements and the structure characteristics of the loading wheel disc and the magnesium alloy deformation characteristic are combined, the device has the main characteristic that a radial-reverse combined extruding mold is adopted; the process is characterized in that the radial-reverse combined extruding process is as follows: an annular blank is prepared by radial and reverse combined extruding of a fixing male die matched with a following male die, metal materials flow towards the directions vertical to and parallel to the movement of the male die simultaneously under the action of the fixing male die, a loading wheel spoke plate is formed due to the metal radial flowing, the metal flowing is limited by the following male die to meet the required size of a bottom hole, a loading wheel disc rim part is formed due to the metal forward and reverse flowing, and the reverse flowing is characterized in that the required height is reached through open type filling; the product performance is improved, the forming force is reduced, and the application of the magnesium alloy loading wheel disc on a crawler can be realized.

Description

technical field [0001] The invention discloses a method and device for forming a magnesium alloy load wheel disk of a crawler vehicle, which belongs to the category of advanced manufacturing technology of metal materials. It is mainly used for the forming of magnesium alloy load wheels, and can be widely used in the forming and manufacturing of various thick-walled, low-tube magnesium or aluminum alloy cylindrical or disc-shaped parts with holes at the bottom. Background technique [0002] Lightweight is one of the main directions in the development of weapons and equipment. As an important part of the tracked vehicle's mobile device, the road wheel is used to support the car body and keep the car body rolling on the track. It has a large number in the whole vehicle and accounts for a large proportion of the vehicle weight. Therefore, it is of great significance to reduce the weight of the vehicle and improve the mobility by studying the new material of the road wheel and i...

AI Technical Summary

Problems solved by technology

However, magnesium alloy cast products have low tensile strength and poor toughness, which makes it difficult to meet the high-strength and high-impact use requirements of load wheels; therefore, forged magnesium alloy load wheels have become an ideal solution

[0006] However, due to the difficult formability of magnesium alloy materials, the complexity of the structure of the load wheel and the particularity of product performance requirements, the forming and manufacturing of the magnesium alloy load wheel is more difficult. The main problems are as follows: (1) Magnesium alloy metal Typical close-packed hexagonal crystal structure, poor plasticity, easy to crack during the forming process, and the product performance is strongly affected by the forming process parameters, it is difficult to achieve the unity of deformation and toughness; (2) the structure of the load wheel is complex, the shape of the web is diverse, The external dimension is large, and the outer diameter is more than 500mm. Traditional forging or extrusion requires large-tonnage equipment; (3) As a high-speed anti-fatigue component, the load wheel has high requirements for mechanical properties, especially for the main load-bearing part of the web. fatigue performance

[0007] Relevant research on magnesium alloy wheels has been carried out at home and abroad, such as the patent "A Method and Device for Labor-Saving Extrusion of Automobile Wheels" (ZL200610012829.9), which proposes a forming method for hollow billet reverse extrusion and then upsetting, which solves the problem of Traditional wheels have problems such as poor forming performance and large forming force, but there are many forming processes and complicated processes, so it is suitable for forming thin-walled and high-tube parts

The patent "A special load wheel for armored vehicles formed by spinning technology" (application number CN201220583199) proposes a spinning forming process for aluminum alloy load wheels, which has the characteristics of light weight, small processing amount, and low energy consumption. Large-tonnage equipment is still required for billet making, and the production efficiency is low

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