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Manufacturing method of thin-walled high-strength frame tube

A manufacturing method and frame tube technology, which are applied to vehicle components, substructures, transportation and packaging, etc., can solve problems such as inability to meet the use requirements of frame tubes, and achieve high strength and toughness, high weld strength, and good toughness.

Active Publication Date: 2016-12-07
无锡苏嘉法斯特汽车零配件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common products currently on the market cannot meet the requirements for the use of frame tubes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Manufacture of automobile frame tubes with a specification of Φ103×3.5mm includes the following steps:

[0021] 1) Strip cutting: according to the required diameter of the frame tube product, the purchased raw material coils with a thickness of 3.5 mm and a width of 1280 mm are slit on a slitting machine into a strip steel with a width of 322 mm; the raw material coils Use a 3.5mm coiled plate with a tensile strength between 600-750Mpa, an elongation between 20-30%, and a carbon equivalent between 0.4-0.55; Locate the center line of the coiled plate at a distance of 10 meters, adjust the center line of the knife holder and the winder based on this line, press the unwinding side of the coiled plate with the pressure wheel, and keep the center line stable; The gap is controlled within 0.1mm, and the overlapping depth of disc cutters is greater than 4mm;

[0022] 2) Pickling treatment: The slitting steel strip is successively passed through the pickling tank, cold water t...

Embodiment 2

[0029] Manufacture of automobile frame tubes with a specification of Φ103×3.5mm includes the following steps:

[0030] 1) Strip cutting: according to the required diameter of the frame tube product, the purchased raw material coils with a thickness of 3.5 mm and a width of 1280 mm are slit on a slitting machine into a strip steel with a width of 322 mm; the raw material coils Use a 3.5mm coiled plate with a tensile strength between 600-750Mpa, an elongation between 20-30%, and a carbon equivalent between 0.4-0.55; Locate the center line of the coiled plate at a distance of 10 meters, adjust the center line of the knife holder and the winder based on this line, press the unwinding side of the coiled plate with the pressure wheel, and keep the center line stable; The gap is controlled within 0.1mm, and the overlapping depth of disc cutters is greater than 4mm;

[0031] 2) Pickling treatment: The slitting steel strip is successively passed through the pickling tank, cold water t...

Embodiment 3

[0038] Manufacture of automobile frame tubes with a specification of Φ103×3.5mm includes the following steps:

[0039] 1) Strip cutting: according to the required diameter of the frame tube product, the purchased raw material coils with a thickness of 3.5 mm and a width of 1280 mm are slit on a slitting machine into a strip steel with a width of 322 mm; the raw material coils Use a 3.5mm coiled plate with a tensile strength between 600-750Mpa, an elongation between 20-30%, and a carbon equivalent between 0.4-0.55; Locate the center line of the coiled plate at a distance of 10 meters, adjust the center line of the knife holder and the winder based on this line, press the unwinding side of the coiled plate with the pressure wheel, and keep the center line stable; The gap is controlled within 0.1mm, and the overlapping depth of disc cutters is greater than 4mm;

[0040] 2) Pickling treatment: The slitting steel strip is successively passed through the pickling tank, cold water t...

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Abstract

The invention relates to a manufacturing method of a thin-walled high-strength frame tube. The manufacturing method of the thin-walled high-strength frame tube comprises the following steps: strip steel cutting, acid pickling, cold rolling, roll bending forming and welding, welded joint purified treatment, annealing treatment and the like. The frame tube machined by the manufacturing method is thin in wall, high in strength and good in extension, and according to 90-degree and 0-degree flattening tests of steel tubes, welded joints are totally flattened, and cracks do not exist; and a test of residual stress of the steel tubes is smaller than 15 mm, wall thickness difference is lower than 0.05 mm, and the service strength of the welded joints of products is higher than that of a base material.

Description

technical field [0001] The invention relates to a manufacturing method of a thin-walled high-strength frame tube used for placing an engine assembly, a brake assembly, a steering wheel assembly, etc. on the front of an automobile, and belongs to the technical field of metal material processing. Background technique [0002] Since the reform and opening up, China's auto industry has developed rapidly. Especially after entering the new century, both output and sales have shown explosive growth. Especially after the production and sales exceeded 18 million in 2010, my country has become the world's largest auto manufacturer. And consumer countries, my country's auto market is considered to be the market with the greatest potential for future development. The automobile industry has become an important pillar industry of the national economy, has formed a relatively complete industrial system, and has become a landmark industry that reflects the country's competitiveness. [000...

Claims

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Application Information

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IPC IPC(8): B23P15/00B62D21/00
CPCB23P15/00B23P2700/50B62D21/00
Inventor 龚海涛俞峰王来福
Owner 无锡苏嘉法斯特汽车零配件有限公司
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