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A kind of wheel hub extrusion forming method

A technology of extrusion forming and wheel hubs, which is applied in the directions of wheels, transportation and packaging, and metal processing equipment, etc., can solve the problems that the excellent mechanical properties cannot be fully exerted, the performance of the hubs cannot reach the best, and the quality of the hub forming is not good. The forming process is simple and easy, the material utilization rate is improved, and the grain is compacted.

Active Publication Date: 2021-09-21
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

Method used

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  • A kind of wheel hub extrusion forming method
  • A kind of wheel hub extrusion forming method
  • A kind of wheel hub extrusion forming method

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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 working table 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 proc...

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Abstract

The invention discloses a method for extruding a wheel hub. The wheel hub is manufactured by means of two-step extrusion forming of pre-forging and final forging. In the pre-forging stage, the rim and inner rim of the wheel hub are extruded by the downward reverse extrusion movement of the pre-forging upper punch; in the final forging forming stage, the downward extrusion movement of the final forging upper die is used The outer rim and each spoke part of the hub are obtained by extrusion molding; the manufacturing process of the hub is relatively simple by the above-mentioned forming method, the production efficiency is high, the forming pressure is smaller, the utilization rate of the near net shape material is high, and the mechanical properties of the hub are 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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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/02B21J1/04B21K1/40
CPCB21J1/04B21J5/002B21J5/025B21K1/40
Inventor 吴志林成忠威陈智仁
Owner NANJING UNIV OF SCI & TECH
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