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Periodic longitudinal variable-thickness strip and longitudinal variable-thickness plate and preparation method thereof

A longitudinally variable thickness and periodic technology, applied in the direction of material size control, non-electric variable control, electric speed/acceleration control, etc., can solve the problem of inability to achieve transitional connection between thick plates and thin plates, and achieve thickness control easily , good reliability and good surface quality

Active Publication Date: 2009-12-23
SHENYANG DONGBAO HAIXING METAL MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that the existing laser tailor welded blanks cannot achieve the transitional connection between the thick plate and the thin plate, the present invention provides a periodic longitudinally variable thickness strip formed by rolling, with a transition zone connection between the thick zone and the thin zone , Longitudinal variable thickness plate and preparation method thereof

Method used

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  • Periodic longitudinal variable-thickness strip and longitudinal variable-thickness plate and preparation method thereof
  • Periodic longitudinal variable-thickness strip and longitudinal variable-thickness plate and preparation method thereof
  • Periodic longitudinal variable-thickness strip and longitudinal variable-thickness plate and preparation method thereof

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preparation example Construction

[0368] Such as Figure 17 As shown, the preparation method of the longitudinally variable thickness plate comprises the following steps:

[0369] Step 1: According to the requirements of the user and the characteristics of the steel type, the coiled periodic longitudinally variable thickness strip is divided into two types that require annealing and do not require annealing;

[0370] Step 2: Perform annealing treatment on the coil that needs to be annealed. The purpose of annealing is to eliminate work hardening and improve formability. Annealing can be carried out in an ordinary bell annealing furnace with atmosphere protection, and the annealing temperature can be selected between 550-750°C according to the steel type of the strip;

[0371] Step 3: The annealed and non-annealed coils are transported to the finishing line and uncoiled by the uncoiler;

[0372] Step 4: The variable-thickness strip after uncoiling is straightened by a straightening machine;

[0373] Step 5: ...

Embodiment 1

[0375] Incoming material status: Uniform thickness, steel type is IF steel, width 500mm, thickness 1.3mm.

[0376] Product size: three thicknesses, two transition areas; the thickness of the thick area is 1.2mm, and the length is 300mm; the transition area 1 is a double-arc dominant transition curve, and the length of the transition area 1 is 50mm; the thickness of the thin area 1 is 1.0mm, and the length is 300mm; the transition area 2 is a concave-arc-dominated transition curve, the length of the transition zone 2 is 50mm; the thickness of the thin zone 2 is 0.8mm, and the length is 300mm.

[0377] The specific rolling process is as follows:

[0378] 1) Calculate the mathematical model of the transition curve of the transition zone of the set target strip;

[0379] The mathematical model of the transition curve in transition zone 1 is:

[0380] Y = 250001 40 + ( ...

Embodiment 2

[0404] Incoming material status: uniform thickness, steel type is ST12, width 450mm, thickness 2mm;

[0405] Product size: two thicknesses, one transition zone; thick zone thickness 1.5mm, length 200mm; transition zone length 100mm; thin zone thickness 0.8mm, length 200mm; transition zone is a curve-dominated transition curve.

[0406] The specific rolling process is as follows:

[0407] 1) Calculate the mathematical model of the transition curve of the transition zone of the set target strip;

[0408] The mathematical model of the transition curve in the transition zone is:

[0409] y = 21 200000 x 2 - 7 10000000 x 3

[0410] 2) Input the original data on the man-machine interface computer according to the above requirements

[0411] 3) The process control computer calculates the rolling schedule ...

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Abstract

The invention belongs to the rolling technical field. The thickness of a periodic longitudinal variable-thickness strip changes periodically, the periodic longitudinal variable-thickness strip has more than two kinds of thicknesses regions and transition regions within a change period, and is formed by rolling. The control procedure of the periodic longitudinal variable-thickness strip comprises the following steps: inputting original data; displaying and storing real-time data and a history curve; computing the rolling procedure; generating a change curve; tracking the position of a rolling piece; and controlling the thickness, the speed and the tension. A device comprises a rolling mill, a reeling machine and a thickness measurer which are arranged at two sides of the rolling mill, and a length measuring roll arranged between the reeling machine and the rolling mill, wherein a reel diameter measurer is arranged on the reeling machine; a rolling force sensor and a hydraulic cylinder are arranged on the rolling machine; a pulse coder and a tension meter are respectively arranged on and below the length measuring roll; and the thickness measurer and the like are connected with a computer control system. A longitudinal variable-thickness plate has two or more kinds of different thickness regions, transition regions are arranged among the thickness regions, and the plate is formed by the strip through the steps of annealing, unreeling by an unreeler, leveling by a leveler, and cutting by a cutting machine.

Description

Technical field: [0001] The invention belongs to the technical field of rolling, in particular to a periodically longitudinally variable-thickness strip, a longitudinally-variable-thickness plate and a preparation method thereof. Background technique: [0002] Under the new situation that the world's energy and resources are becoming more and more tense, and sustainable development has become a consensus, the weight reduction of automobiles has attracted people's attention. With the emergence of laser tailor welded blanks, steel plates with different thicknesses are welded together to achieve weight reduction of stamped sheet parts used for the body; however, laser tailor welded blanks have the following disadvantages, such as figure 1 Shown: [0003] (1) A series of processes are added, thereby increasing production costs; [0004] (2) There is one more (or several) weld seam, which affects the surface quality of stamping plate parts; [0005] (3) The sudden change of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/22B21B37/26B21B37/46G05B19/05G05D5/02G05D13/62G05D15/01
Inventor 刘相华支颖张殿华胡贤磊孙涛矫志杰吴志强李旭孙杰
Owner SHENYANG DONGBAO HAIXING METAL MATERIAL TECH
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