Manufacturing method of laser impact sheet forming limit diagram and data acquisition device

A forming limit map and laser shock technology, applied in laser welding equipment, manufacturing tools, welding equipment, etc., can solve the problems of inability to obtain the forming limit map of laser shock sheet metal, and inability to predict and control the high strain rate formability of laser shock waves. , to achieve the effect of avoiding excessive impact phenomenon, low cost and short preparation time

Inactive Publication Date: 2010-06-23
JIANGSU UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the laser shock wave high strain rate formability cannot be predicted and controlled due to the lack of the manufacturing...

Method used

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  • Manufacturing method of laser impact sheet forming limit diagram and data acquisition device
  • Manufacturing method of laser impact sheet forming limit diagram and data acquisition device
  • Manufacturing method of laser impact sheet forming limit diagram and data acquisition device

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Such as Figure 4 , 5 shown.

[0027] A method for making a laser shock sheet forming limit diagram, comprising data collection and drawing a sheet forming limit diagram, the data collection comprising the following steps: (1) placing a sheet printed with a circular grid on an elliptical concave On the mold, move the blank holder ring with calendering ribs down and make the sheet enter the calendering groove, apply the blank holder force on the blank holder ring, so that the sheet material is crushed to death; (2) apply a vertical laser on the center surface of the sheet material For impact load, use the optical power meter as an instrument for checking the breakage of the sheet metal. When the digital display of the optical power meter shows the continuous red light emitted by the red light, stop the laser impact and take the sheet material out of the elliptical die; (3 ) On the sheet metal, select the grid with the largest deformation and an ellipse after deformatio...

Embodiment 2

[0039] Such as Figure 1-5 shown.

[0040]A kind of laser impact sheet metal forming limit diagram production data acquisition device, it comprises central control processor 1 (composed of CPU and corresponding control program and conventional peripheral circuit), laser controller 2 (laser supporting parts, can be matched by the laser manufacturer) Provide), repetition frequency pulse laser 3, external optical path system 4, spot adjustment device 6, red light 7, optical power meter 8, multi-axis coordinate table 14 and coordinate axis rotation controller 15, central processing unit 1 and laser control respectively Device 2, spot adjustment device 6 (mainly made up of optical components such as lens, magnifying glass, total reflection mirror. Can adopt existing technology to realize), optical power meter 8 (can be purchased directly from the market) and coordinate axis rotation controller 15 ( Can directly adopt the similar device on the existing machine tool) to be electrica...

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Abstract

The invention discloses a manufacturing method of a laser impact sheet limit diagram and a data acquisition device, the limit manufacturing comprises data acquisition and drawing sheet forming limit diagram, wherein, the data acquisition comprises (1) putting the sheet printed with fine circular grids at an oval concave module; (2) the center surface of the sheet is provided with vertical laser impact load, and an optical power meter is used as an instrument for detecting the sheet break, when a digital display of the optical power meter displays the continuous red light emitted by a red light, the laser impact is stopped, and the sheet is taken out from the oval concave module; (3) the grid which presents oval shape after deformation and is most near to the break point is selected from the sheet, an grid instrument is used to detect a long shaft value and a short shaft value of the oval grid and calculates and converts them to a first main strain value and a second main strain value; (4) the ovality of the oval concave module is changed, and the steps (1)-(3) are repeated, at least 5 groups of experimental data are obtained to draw the curve; the key point of the device lies in that an infrared lamp and the optical power meter are adopted to detect whether break occurs. The invention is simple, the experimental cost is low, and the laser impact forming limit diagrams of various sheets can be rapidly drawn.

Description

technical field [0001] The invention relates to a method and a device for making a sheet metal forming limit diagram, in particular to a method and a device for making a laser shock sheet metal forming limit diagram. Background technique [0002] As we all know, laser shock sheet forming is a composite forming technology that integrates material modification, strengthening and forming. It has the characteristics of ultra-high pressure, fast speed and high strain rate, and has wide potential in many fields such as automobile, aviation and national defense industry. Application prospects. However, the research on laser shock sheet forming has just started, and many theoretical and technological problems have not been effectively resolved. For example, in the process of laser shock forming, due to the large impact force, it is very easy to produce defects such as sheet metal forming cracks. The forming limit diagram is an important criterion for evaluating the formability of ...

Claims

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Application Information

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IPC IPC(8): B23K26/00B23K26/42B23K26/70
Inventor 姜银方唐振州张永康王宏宇方雷李志飞任爱国钱晓明尤建张磊管海兵鲁金忠顾永玉
Owner JIANGSU UNIV
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