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Research on Incremental Forming of ST16 Tailor-welded Blanks

Author: ZhaoXiuMin
Tutor: ZuoLin
School: Nanjing University of Aeronautics and Astronautics
Course: Materials Processing Engineering
Keywords: Incremental Forming Tailored Blanks Lubricating Formability Wall thickness distribution
CLC: TG456.6
Type: Master's thesis
Year: 2010
Downloads: 54
Quote: 0
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Abstract


CNC incremental forming technology is a new non-die forming technology, it is focused on resolving the field of sheet metal forming mold design cycle is long, the cost of the high and the contradictions of modern single and small batch custom production mode. Tailored Blanks has received more and more attention from industry and academia with its own merits. The article was first NC incremental forming technology applied to the laser tailor welded blank forming field, expand Tailored Blanks forming. This paper studies forming the basis of Tailored Blanks; followed by uniaxial tension test specimen through the different thickness of the sample in different directions, and location of the weld in tailored blanks, incremental forming test conclusions guidance; by measuring again ST16 steel lubrication conditions forming limit angle, forming surface wear morphology and observed with a CCD camera and an optical microscope to study the performance and wear characteristics of the sheet incremental forming different lubrication conditions; final comparative study by orthogonal experiment focuses the indenter radius, each feed rate, the impact of the weld location and thickness of the of Tailored Blanks motherboard formability, process parameters on the crack shape, comparative study of Tailored Blanks and motherboard The distribution of the wall thickness of the molded parts. The results show that: 1. Tensile test procedure, the weld direction parallel to the stretching direction, the fracture occurs at the intermediate position of the sample; perpendicular to the weld direction with the tensile direction, the fracture is always in the sheet position. Incremental forming process, changes affect molding performance and wear characteristics of the lubrication conditions; plus disulfide molybdenum lithium base grease lubrication conditions after the phosphating treatment, to ST16, steel incremental forming the best performance; in the process, when indenter forming layer and the layer interval mainly abrasive wear and adhesive wear, when the indenter forming and other senior. 3 laser welded plate forming properties affected by each layer of the feed amount of, Motherboard ST16 steel forming properties by the thickness of the greatest impact; the radius of the pressure head and the amount of each feed extending length of the crack on the molded parts and width; incremental forming Tailored Blanks few weld line movement; of Tailored Blanks motherboard forming parts of the wall thickness distribution is different. Tailored Blanks forming method can expand through the work of this article, to break the unity of its traditional forming methods, at the same time be able to further improve the theory and application range of incremental forming technology.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Welding, metal cutting and metal bonding > Welding process > Special welding > Explosive Welding
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