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Hub extrusion forming method

A technology of extrusion forming and wheel hub, applied in the direction of wheels, transportation and packaging, metal processing equipment, etc., can solve the problems of complex forming equipment, reduced material utilization rate, increased production cost, etc., to achieve a simple and easy forming process, improve material Utilization rate, the effect of saving production costs

Active Publication Date: 2019-11-29
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0002] The existing wheel hub forming methods mainly include: 1. The cast hub is obtained by die-casting. The die-casted hub often has congenital defects such as shrinkage, shrinkage, and coarse grains, which lead to less than optimal performance of the hub. , unable to give full play to its supposed excellent mechanical properties; 2. Upsetting-reverse extrusion-flaring-spinning and bulging, the production efficiency of this forging and spinning forming method is low, the forming equipment is complicated, and after forming The forming quality of the wheel hub is not good, there are cracks, folds and other defects on the surface, the utilization rate of the material is reduced, and the production cost is greatly increased

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Embodiment

[0029] A hub extrusion forming method. Taking a magnesium alloy wheel hub whose material is AZ80 as an example, the process of manufacturing the wheel hub by adopting the wheel hub extrusion forming method of the present invention is divided into two parts: the pre-forging forming of the rim and the inner rim and the final forging forming of the spoke and the outer rim .

[0030] Pre-forging forming process: 1. Obtain a cylindrical cake-shaped magnesium alloy billet, put the billet into a heating furnace to heat at 300-450°C, and keep it warm for a period of time; 2. Put the preheated billet flat into the pre-forging mold cavity place them together on the workbench of the hydraulic press, push the pre-forging upper punch 2 to extrude downward, and back-extrude to obtain the complete pre-forged wheel blank with the rim and inner rim of the wheel hub, and obtain the pre-forged wheel blank after simple processing Such as Figure 7 shown;

[0031] Final forging forming process:...

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Abstract

The invention discloses a hub extrusion forming method. A hub is produced and manufactured in a pre-forging and final forging two-step extrusion forming mode. In the pre-forging stage, a rim and an inner rim portion of the hub are extruded and formed through downward reverse extrusion motion of a pre-forging upper male die, and an outer rim and wheel arm parts of the hub are extruded and formed through the downward extruding motion of a final forging upper die in the final forging forming stage. The hub producing and manufacturing process by adopting the forming method is simple, the production efficiency is high, the forming pressure is smaller, the near-net forming material utilization rate is high, and the hub mechanical performance is more excellent.

Description

technical field [0001] The invention belongs to the technical field of hub forming, in particular to a hub extrusion forming method. Background technique [0002] The existing wheel hub forming methods mainly include: 1. The cast hub is obtained by die-casting. The die-casted hub often has congenital defects such as shrinkage, shrinkage, and coarse grains, which lead to less than optimal performance of the hub. , unable to give full play to its supposed excellent mechanical properties; 2. Upsetting-reverse extrusion-flaring-spinning and bulging, the production efficiency of this forging and spinning forming method is low, the forming equipment is complicated, and after forming The forming quality of the wheel hub is not good, there are defects such as cracks and folds on the surface, the utilization rate of the material is reduced, and the production cost is greatly increased. Contents of the invention [0003] The purpose of the present invention is to provide a wheel hu...

Claims

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Application Information

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IPC IPC(8): B21J5/02B21J1/04B21K1/40
CPCB21J1/04B21J5/002B21J5/025B21K1/40
Inventor 成忠威吴志林陈智仁
Owner NANJING UNIV OF SCI & TECH
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