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Molding technology for hub supports

A molding process and wheel hub technology, applied in the field of automobile parts manufacturing, can solve the problems of large differences in comprehensive mechanical properties, complex shapes, and increase the difficulty of component production, and achieve the effect of improving shear strength and hardness, and improving comprehensive mechanical properties.

Active Publication Date: 2017-02-15
宁波可挺汽车零部件有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The hub bracket is the main security part of the car, and it is also an important force transmission part. It requires the metal of the component to have good comprehensive mechanical properties such as shear resistance and impact resistance; the manufacturing process of the hub bracket generally includes the machining process. And forging process, machining adopts CNC lathe, horizontal multi-station rotary table combination machine, special machine tool and CNC grinding machine as the main equipment, the accuracy of the components is generally no problem; in the forging process, due to the complex shape of the component parts, The overall shape is elongated, and the areas of the head and the stem differ greatly. The ratio of the maximum cross-sectional area of ​​the forging head to the stem is about 10:1, which increases the difficulty of making the components, and the performance consistency of the components is poor. Performance varies greatly

Method used

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  • Molding technology for hub supports

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Experimental program
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Effect test

Embodiment

[0018] A wheel hub bracket forming process, comprising the steps of:

[0019] (1) Blanking: choose cylindrical steel with a length-to-diameter ratio of (1.8-2.2): 1 as the forging raw material; the steel is made of 40Cr alloy steel;

[0020] (2) Forging: Heat the forging raw material to 1250±10°C, and then pull it out. After pulling out, the length increases by 20% to 30%, and then put it into the bending die for bending. The temperature of the bending die is 370±20°C, and the shape Initial forging: return the initial forging to the furnace and heat it to 1200±10°C, one end of the initial forging is the rod end, the other end is the head end, and the head end is chamfered according to the cross-sectional area of ​​1: (0.6~0.7):( 0.3~0.4) for forging, the head end is forged according to the ratio of 1: (0.9~1.1) to form a middle forging; the middle forging is returned to the furnace and heated to 1160±10°C, and then put into the forming mold for forming, the forming mold temper...

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Abstract

The invention provides a molding technology for hub supports. The technology comprises three steps including a blanking step, a forging step and a quenching and tempering treatment step. With the technology, preliminary forging, intermediate forging and final forging are performed in the forging process, coarse grains are prevented through stage-by-stage treatment, and compared with hub supports molded with the prior art, the hub supports have the advantages that the shear strength and the hardness are greatly improved and the comprehensive mechanical performance is improved.

Description

technical field [0001] The invention relates to the field of automobile parts manufacturing, more specifically, to a wheel hub bracket forming process. Background technique [0002] The car torsion beam rear suspension is generally composed of a trailing arm, a hub bracket, a spring seat, a torsion bar bracket, and a torsion bar. The hub bracket is the main security part of the car, and it is also an important force transmission part. It requires the metal of the component to have good comprehensive mechanical properties such as shear resistance and impact resistance; the manufacturing process of the hub bracket generally includes the machining process. And forging process, machining adopts CNC lathe, horizontal multi-station rotary table combination machine, special machine tool and CNC grinding machine as the main equipment, the accuracy of the components is generally no problem; in the forging process, due to the complex shape of the component parts, The overall shape is...

Claims

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Application Information

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IPC IPC(8): B21K1/40B21J3/00C21D9/00C21D1/18
CPCB21J3/00B21K1/40C21D1/18C21D9/0068
Inventor 任宁向帅陈一田张孟军
Owner 宁波可挺汽车零部件有限公司
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