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A steering knuckle for a cast-forged combined anti-torsion and impact-resistant vehicle and its manufacturing method

A manufacturing method and anti-torsion technology, applied in the direction of steering rods, steering mechanisms, vehicle components, etc., can solve the problems of poor torsion resistance, poor fatigue resistance, high process difficulty, etc., and achieve the ability to resist axial stretching and extrusion Strong, improved performance, and low process difficulty

Active Publication Date: 2021-09-24
湖北洪伯车辆有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Steering knuckles in the prior art are generally formed by bar forging or direct casting, so they can only have the unilateral advantages of the two processes, such as forging can obtain high strength, fine grains and excellent comprehensive mechanical properties. performance, but high residual stress, large material loss, high process difficulty, and poor fatigue resistance are its inherent defects, which have not been overcome in the prior art; casting is simple and fast, saves materials, and low process difficulty, but its materials are affected by Limit, low strength, poor torsion resistance are its inherent defects
[0004] At present, in the relevant patents that have been applied in China, there is no existing technology that comprehensively improves the material structure from the billet link. Therefore, the market needs a combination of forging and casting, one-time molding, radial grain growth, good compactness, and strength. High, torsion-resistant, shock-resistant steering knuckle

Method used

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  • A steering knuckle for a cast-forged combined anti-torsion and impact-resistant vehicle and its manufacturing method
  • A steering knuckle for a cast-forged combined anti-torsion and impact-resistant vehicle and its manufacturing method
  • A steering knuckle for a cast-forged combined anti-torsion and impact-resistant vehicle and its manufacturing method

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A steering knuckle for a cast-forged combined torsion-resistant and impact-resistant vehicle. The steering knuckle has a porosity of 0%-0.2%, and the grain growth direction is generally horizontal from the outermost edge to the center of the axis. The material used is ZGD730-910;

[0025] The manufacturing method of the steering knuckle for the above-mentioned casting and forging combined with anti-torsion and impact resistance includes the following stages:

[0026] 1) Preparation before manufacturing

[0027] ① Raw material preparation: prepare sufficient quantities of low-alloy steel ingots for design;

[0028] ② Tooling preparation: Prepare a water-cooled steel mold rotary casting mold. The mold is composed of two half-moulds. The mold parting surface 6 is located on the center line of both sides of the symmetry. The mold entity is the matrix 1, which is made of graphite. Font-X-shaped circular communication, wherein the I-shaped corresponds to the central shaft of...

Embodiment 2

[0038] The whole is consistent with Example 1, the difference is:

[0039] The material used for the steering knuckle is ZGD345-570;

[0040] The manufacturing method of the steering knuckle for the above-mentioned casting and forging combined with anti-torsion and impact resistance includes the following stages:

[0041] 1) Preparation before manufacturing

[0042] ②Tooling preparation: base body 1 is provided with a circulating water channel 3 on the radially outer side of the runner 2 and close to the runner 1.2cm; prepare a single-section inner cavity size that is 3% larger than the design outline size of the steering knuckle, and the inner surface is 10 layers of nickel foil of;

[0043] 2) casting

[0044] ① Spray the two parting molds of the water-cooled steel mold rotary casting mold prepared in stage 1) and step ②, respectively, spray the mold parting agent, combine and assemble them, and then install and fix them on the rotating chassis in the furnace to correspond ...

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Abstract

The invention discloses a steering knuckle for a vehicle with casting and forging combined with anti-torsion and impact resistance and a manufacturing method thereof. The steering knuckle has a porosity of 0%-0.2%, and the grain growth direction is generally horizontal from the outermost edge to the center of the axis. The material used is cast low alloy steel. The steering knuckle of the invention combines one-time molding with forging and casting, crystal grains grow radially, has good compactness, high strength, torsion resistance and impact resistance.

Description

technical field [0001] The invention relates to the field of structural parts for vehicles, in particular to a steering knuckle for a vehicle with a combination of casting and forging, anti-torsion and impact resistance, and a manufacturing method thereof. Background technique [0002] The function of the steering knuckle is to transmit and bear the front load of the car, support and drive the front wheel to rotate around the kingpin to turn the car. When the car is running, it bears variable impact loads, so it is required to have high comprehensive mechanical properties, especially torsional strength, impact toughness and fatigue resistance. [0003] Steering knuckles in the prior art are generally formed by bar forging or direct casting, so they can only have the unilateral advantages of the two processes, such as forging can obtain high strength, fine grains and excellent comprehensive mechanical properties. performance, but high residual stress, large material loss, hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D13/00B22D27/04B21K1/76B62D7/18
CPCB21K1/762B22D13/00B22D27/045B62D7/18
Inventor 钱金松张烨玮
Owner 湖北洪伯车辆有限公司
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