Method for correcting overall distorsion of structural plate after laser forming

A laser forming and structural plate technology, applied in the field of plate processing, can solve the problems of long aging forming cycle, low forming efficiency, plate distortion and other problems, and achieve the effect of improving effectiveness and yield, reasonable strategy and clear organization

Active Publication Date: 2017-02-01
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

The forming of lightweight structural panels mainly relies on traditional mechanical forming, aging forming, etc. The ribs of this type of plate are easy to break and fail under the traditional mechanical forming method. In addition, the springback phenomenon after forming makes the forming efficiency low. The cycle is long and the efficiency is low. Therefore, with the increasing application range of this kind of sheet metal, a rapid prototyping technology is urgently needed to meet the needs of the industry. Laser sheet metal forming technology is a kind of laser sheet metal forming technology because of its large forming flexibility. Good choice
[0004] The use of laser sheet forming technology to form lightweight structural panels is different from laser forming of ordinary flat panels. It is necessary to comprehensively consider the structural characteristics of lightweight structural panels. The phenomenon of overall distortion and deformation makes the sheet unable to continue forming. Therefore, for the overall distortion and deformation of lightweight structural plates after laser forming, it is urgent to provide a correction method to correct the overall distortion and deformation of lightweight structures after laser forming plate, thus ensuring the subsequent continuous forming process of lightweight structural plates

Method used

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  • Method for correcting overall distorsion of structural plate after laser forming
  • Method for correcting overall distorsion of structural plate after laser forming
  • Method for correcting overall distorsion of structural plate after laser forming

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Embodiment 1

[0029] As described above, the method for correcting the overall distortion of the lightweight structural panel is different from this embodiment in that: figure 2 As shown, the method for correcting the overall distortion of the lightweight structural plate after laser forming, the specific implementation steps are as follows:

[0030] Step 1: Fix the overall twisted lightweight structural plate on the workbench with a clamp, using the same fixing method as before the laser forming of the lightweight structural plate;

[0031] Step 2: Use the supporting device to support the two ends of the twisted end of the overall twisted and deformed lightweight structural panel; and initially correct the panel;

[0032] Step 3: Measure the deformation of different parts of the scanning line of the light-weight structural board after correction;

[0033] Step 4: Classify the deformation of the lightweight structural plate according to the measurement results: (1) The bending deformation of the r...

Embodiment 2

[0038] Like the method for correcting the overall distortion of the lightweight structural panel described above, this embodiment is different from that in step 4, measuring the deformation of different parts of the corrected scanning line of the lightweight structural panel, and the measurement method can be three-dimensional Scanner, laser displacement meter and other equipment.

Embodiment 3

[0040] As the method for correcting the overall distortion of the lightweight structure board as described above, the difference between this embodiment and the lightweight structure is that the overall size of the lightweight structure is 696mm×400mm. The forming experiment is carried out. The surface of the board is coated with graphite. The parameters are: laser power 1100W, scanning speed 20mm / s, spot diameter 12mm, in the grid unit area 90mm, 126mm, and 162mm away from the free end of the sheet, the scanning strategy of constant speed, constant power and constant spot size is used in each scanning position. After scanning for five times, the overall distortion of the lightweight structure board was generated after scanning. After the overall distortion of the board was corrected by the supporting device, the deformation of the board was measured. The measurement device was carried out by the Canadian CREAFORM handheld 3D scanner. As a result, the bending deformation of the ...

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Abstract

The invention provides a method for correcting overall distorsion of a structural plate after laser forming. Aiming at overall distorsion deformation phenomenon of a light structural plate after laser forming, after a support device is used for correcting the light structural plate with overall distorsion deformation, the deformation of the corrected light structural plate is measured, the bending angles of the light structural plate in different positions on a scanning line path are measured, and subsequent correcting measures of the light structural plate are determined according to the deformation conditions of reinforcing rib parts in different positions. The correcting method corrects the light structural plate with overall distorsion deformation phenomenon after laser forming, so that the subsequent progressive forming process of the light structural plate is guaranteed, and the effectiveness and the yield of laser forming of the light structural plate are improved.

Description

Technical field [0001] The invention relates to the field of plate processing, in particular to a method for correcting the overall distortion of a structural plate after laser forming. Background technique [0002] Sheet metal forming technology is widely used in modern aviation, aerospace, shipbuilding, automotive and other industries, and sheet metal parts occupy a large proportion. Therefore, it is necessary to conduct in-depth research on sheet metal forming technology to master its forming mechanism and improve forming accuracy in order to better Applied in practice; in this area, many scholars have conducted related research and achieved many research results. The laser sheet forming technology uses laser beams to irradiate the surface of the sheet metal to generate a strong temperature gradient in the thickness direction of the sheet metal, induce uneven thermal stress, and then generate a bending moment at the cross section of the sheet to act on the sheet, and at the sa...

Claims

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Application Information

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IPC IPC(8): B21D1/00
CPCB21D1/00
Inventor 王扬付守冲杨立军张宏志
Owner HARBIN INST OF TECH
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