Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method of manufacturing a high-strength torsion beam beam

A manufacturing method and torsion beam technology, applied in the field of auto parts, can solve the problems of increased die wear, reduced part yield, and reduced die service life, achieve good tensile strength performance and fatigue durability, reduce die wear, high The effect of yield requirements

Active Publication Date: 2018-01-30
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
View PDF8 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can obtain a torsion beam with a certain strength, however, as the strength of the material increases, the load required to obtain the closed torsion beam and the requirements for the mold are gradually increasing, and the wear of the mold is intensified, which is easy to cause mold failure. The reduction of the service life and the reduction of the yield of parts, etc. Therefore, the strength of the existing internal high pressure forming can only reach about 780MPa, and in order to meet the requirements of the yield, only steel plates with a strength of 600MPa are generally used. material, and in this document, in order to obtain a higher strength finished product, it is achieved by improving the preforming process, but it can only achieve a strength performance of about 428MPa
Since the strength of the material cannot be improved, the torsion beam cannot meet the original design requirements, and the number of fatigue cycles cannot meet the requirements

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The selected steel slab in the present embodiment is mainly made up of the raw material of the mass percentage of following composition:

[0023] C: 0.2wt%; Mn: 1.5wt%; Si: 0.3wt%; Cr: 0.1wt%; Nb: 0.002wt%; B: 0.005wt%;

[0024] In this embodiment, the high-strength torsion beam beam can be produced by the following methods:

[0025] Select the steel plate blank whose microstructure is the dual phase structure of ferrite and pearlite. According to the size of the torsion beam beam, the steel plate blank is crimped by the pipe making machine to obtain the corresponding round pipe with the required diameter, and then the high-frequency The welding machine is then welded, and of course other methods can also be used for welding and forming to obtain a round tube with a closed cross-section; then, the above-mentioned round tube with a closed cross-section is manually or mechanically placed in the mold of the pre-cooled stamping forming machine, and it is heated at room temp...

Embodiment 2

[0027] The selected steel slab in the present embodiment is mainly made up of the raw material of the mass percentage of following composition:

[0028] C: 0.3wt%; Mn: 1.2wt%; Si: 0.5wt%; Cr: 0.2wt%; Nb: 0.001wt%; B: 0.002wt%;

[0029] In this embodiment, the high-strength torsion beam beam can be produced by the following methods:

[0030] Select the steel plate blank whose microstructure is the dual phase structure of ferrite and pearlite. According to the size of the torsion beam beam, the steel plate blank is crimped by the pipe making machine to obtain the corresponding round pipe with the required diameter, and then the high-frequency The welding machine is then welded. Of course, other methods can also be used for welding and forming to obtain a round tube with a closed cross section; Cold stamping is carried out under the condition of ℃ to obtain the torsion beam semi-finished product with the torsion beam surface; the obtained torsion beam semi-finished product is proc...

Embodiment 3

[0032] The selected steel slab in the present embodiment is mainly made up of the raw material of the mass percentage of following composition:

[0033] C: 0.25wt%; Mn: 1.3wt%; Si: 0.4wt%; Cr: 0.15wt%; Nb: 0.002wt%; B: 0.004wt%;

[0034] In this embodiment, the high-strength torsion beam beam can be produced by the following methods:

[0035] Select the steel plate blank whose microstructure is the dual phase structure of ferrite and pearlite. According to the size of the torsion beam beam, the steel plate blank is crimped by the pipe making machine to obtain the corresponding round pipe with the required diameter, and then the high-frequency The welding machine is then welded, and of course other methods can also be used for welding and forming to obtain a round tube with a closed cross section; then, place the round tube with a closed cross section into the mold of the pre-cooling stamping machine manually or by a manipulator. Cold stamping is carried out under the conditio...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
yield strengthaaaaaaaaaa
Login to View More

Abstract

The invention provides a manufacturing method for a high-strength torsion beam cross beam and belongs to the technical field of automobile accessories. The manufacturing method for the high-strength torsion beam cross beam is provided for solving the problem of how to achieve the effect of improving the strength performance and fatigue resistance of materials. The method includes the steps that a steel plate blank with a ferrite and pearlite dual-phase structure serving as a microstructure is selected and coiled into a round pipe with a corresponding size, then welding is conducted, and the closed round pipe is obtained; then pre-forming and internal high-pressure forming are conducted, and the formed torsion beam cross beam is obtained; and finally, the formed torsion beam cross beam is subjected to hot-working treatment at the temperature of 900-980 DEG C, then cooling quenching is conducted, and the high-strength torsion beam cross beam is obtained. According to the manufacturing method, the obtained product has good tensile strength performance and fatigue endurance performance, the tensile strength can reach 1500 MPa or higher, and the yield strength can reach 1000 MPa or higher.

Description

technical field [0001] The invention relates to a method for manufacturing a high-strength torsion beam, belonging to the technical field of auto parts. Background technique [0002] With the continuous increase of global car ownership and the deteriorating ecological environment, how to reduce the carbon emissions of cars has become the primary problem to be solved by the auto industry in all countries in the world. The weight of a car is directly related to fuel consumption and carbon emissions. Research has found that for every 10% reduction in the weight of a car, its fuel consumption can be reduced by 8%-10%. Therefore, the weight reduction of cars is an effective way to solve this problem. one. The use of high-strength steel can ensure the structural strength of auto parts and meet the collision requirements, while effectively reducing the thickness of parts and realizing the lightweight of auto parts. [0003] Automobile torsion beams are chassis parts of automobile...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00C22C38/04C22C38/12C22C38/02C22C38/18C22C38/32
CPCB23P15/00C21D2211/005C21D2211/009C22C38/02C22C38/04C22C38/12C22C38/18C22C38/32
Inventor 刘凯熊飞金建伟胡金艳吴天男余凯
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products