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A material with continuously variable thickness in the transverse direction and its preparation method

A variable thickness, horizontal technology, applied in the direction of manufacturing tools, metal rolling, metal rolling, etc., can solve problems such as difficulty, achieve high production efficiency, low raw material cost, and reduce raw material consumption.

Active Publication Date: 2019-11-22
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned preparation methods of transversely variable thickness materials are all realized by rolling the materials with special roll shapes, which is difficult to process materials with high strength

Method used

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  • A material with continuously variable thickness in the transverse direction and its preparation method
  • A material with continuously variable thickness in the transverse direction and its preparation method
  • A material with continuously variable thickness in the transverse direction and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0032] see Figure 4 ~ Figure 6 , HC420 / 780DP was prepared with lateral variable thickness. The thickness of the raw material is 1.8mm, and the width is 200mm; there are a total of 2 thinning areas, which are symmetrically distributed on the width of the sheet. The thickness requirement is 1.2±0.05mm, and the width requirement is 30±0.5mm (including the transition area).

Embodiment approach

[0033] Its processing implementation method is as follows:

[0034] The preparation process is realized through 3 passes, the rotation speed of the forming tool body 5 in each pass is 540RPM, the sheet feeding speed is 12m / min, the width of each pass is 10mm, and the final sheet width is 219.6mm.

[0035] The material preparation method with transversely continuously variable thickness proposed by the present invention reduces the consumption of raw materials, realizes light weight while meeting the performance requirements of parts; the material unequal thickness processing technology is integrated with the conventional roll forming technology, and the production efficiency is high. The invention can be used for conventional cold-rolled and hot-rolled iron and steel materials, and can also be used for other metal materials such as aluminum alloys and magnesium alloys, and has wide application prospects and economic value.

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Abstract

The invention provides a material with the transverse continuous variable thicknesses and a manufacturing method thereof. According to the material, the different material thicknesses t0, t1, t2, ti and tn are generated at the different positions of the material in the width direction, wherein t0 is the initial material thickness, ti is the thin reduction area thickness, n is the number of thin reduction areas, and n is larger than or equal to 1; thickness transition areas are formed between the thin reduction areas and the non thin reduction areas, the thickness transition areas are transition slopes, and the fillet radius R of each transition slope is equal to 0.5-5 mm. By means of follow-up forming technology, the material is machined to form a part with the variable thickness, and therefore low-weight design and low-cost manufacture of the part can be achieved.

Description

technical field [0001] The invention relates to forming technology, in particular to a material with continuously variable thickness in the transverse direction and a preparation method thereof. Background technique [0002] With the continuous improvement of automobile fuel economy requirements, the lightweight design and manufacturing methods of parts have received more and more attention. Variable-thickness materials can achieve different material thickness distributions according to the service performance requirements of different regions of the parts, and achieve further weight reduction while meeting the functional requirements of the parts. The thickness change of raw materials is mainly realized by laser tailor welding or roll rolling. The variable-thickness material produced by rolling has better performance because of its continuous change in thickness, there is no sudden change in weld seam. [0003] Variable thickness materials are mainly divided into longitud...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/26
CPCB21B37/26B21B2261/046B21B2261/05B21B2275/04
Inventor 石磊张骥超肖华
Owner BAOSHAN IRON & STEEL CO LTD
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