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A method of manufacturing a torsion beam

A technology for torsion beams and pipe fittings, applied in the field of torsion beam manufacturing, can solve problems such as insufficient torsional stiffness in stamping forming, and achieve the effects of easy forming and high tensile strength

Active Publication Date: 2017-10-17
JIANGSU JOYLONG AUTOMOBILE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect of insufficient torsional rigidity in stamping forming in the prior art, and to provide a preparation method of torsion beam

Method used

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  • A method of manufacturing a torsion beam
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Embodiment Construction

[0027] A method for preparing a torsion beam, comprising the steps of:

[0028] (1) Bending, bending the pipe to the required angle;

[0029] (2) Preforming, flattening both ends of the bent pipe fitting, and pressing the middle part of the bent pipe fitting into a V shape;

[0030] (3) Hydroforming: filling stage: put the preformed pipe into the lower mold, close the upper mold, fill with liquid, remove gas, and seal the punches at both ends of the pipe;

[0031] Forming stage: the liquid in the tube is pressurized and bulged, the punches at both ends are pushed forward to replenish the material, and the tube is basically close to the mold;

[0032] Shaping stage: increase the internal pressure to 150MPa, so that the pipe is completely attached to the mold.

[0033] The chemical composition of the pipe fittings is shown in Table 1 below in terms of weight fraction (the balance is Fe):

[0034] Table 1

[0035]

[0036]

[0037] According to the GB228-87 standard, th...

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Abstract

The invention belongs to the technical field of forming and relates to a torsion beam preparation method which comprises the steps of pipe bending, performing, hydraulic forming and thermal treatment. The pipe is prepared from the following chemical components in parts by weight: 0.22-0.24% of C, 0.22-0.25% of Si, 1.22-1.25% of Mn, 0.005-0.008% of P, 0.001-0.002% of S, 0.030-0.049% of Al, 0.003-0.0045% of B, 0.06-0.08% of Ti, 0.05-0.10% of Cr, 0.15-0.2% of Mo, 0.15-0.2% of Ni, less than or equal to 0.05% of Cu, 0.1-0.2% of Co, and the balance of Fe. According to the invention, the pipe has good elongation in a forming state so as to meet a forming requirement; while after material forming is completed, the pipe has relatively high tensile strength through thermal treatment.

Description

technical field [0001] The invention belongs to the technical field of forming, and in particular relates to a manufacturing method of a torsion beam. Background technique [0002] The automobile torsion beam is one of the key components of the automobile. Its main function is to balance the up and down jump of the left and right wheels to reduce the shaking of the vehicle and maintain the stability of the vehicle. . The components of the torsion beam of the traditional structure are mostly formed by sheet metal stamping, and the torsional stiffness of the beam is relatively small. Therefore, a stabilizer bar is added to increase its torsional stiffness. The torsion beam of the new structure adopts a tubular structure with a closed cross-section configuration, and the torsion Rigidity is higher, so the stabilizer bar is cancelled. [0003] Most of the existing domestic torsion beams are formed by stamping high-strength steel plates. Although the forming process is relative...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/14C22C38/18C22C38/12C22C38/08C22C38/16C22C38/10C21D1/18B21D47/01B21D26/00
CPCB21D26/049B21D47/01C21D1/18C22C38/002C22C38/02C22C38/04C22C38/06C22C38/105C22C38/12C22C38/14C22C38/16C22C38/18
Inventor 冯勇徐小华
Owner JIANGSU JOYLONG AUTOMOBILE
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