Vision measurement device of sheet forming limit curve

A technology of forming limit and visual measurement, applied in the field of machining, it can solve the problems of curve change, spending a lot of time, small mesh, etc., and achieve the effect of quick acquisition and low cost

Inactive Publication Date: 2014-08-06
XI AN JIAOTONG UNIV
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Problems solved by technology

[0003] The disadvantages of the traditional method include: (1) the curves where various strains occur should be located, but this will take a lot of time (many tests are done for each width); (2) the curves need to be changed after fracture; (3) the simulation The difference between the two curves needs to be compensated, and a certain margin must be given; (4) Some materials require smaller meshes than usual

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  • Vision measurement device of sheet forming limit curve
  • Vision measurement device of sheet forming limit curve
  • Vision measurement device of sheet forming limit curve

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[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and exemplary embodiments. It should be understood that the exemplary embodiments described here are only used to explain the present invention, and are not intended to limit the applicable scope of the present invention.

[0023] Such as figure 1 As shown, the present invention is a visual measurement device for sheet metal forming limit curve, which is composed of a speckle dynamic strain measurement system and a cupping forming test machine, wherein the speckle dynamic strain measurement system includes a binocular stereo measuring head 1; The protrusion forming testing machine includes a measuring head support 2, an integral frame 3, a cup forming punching device 4 and a built-in punching machine (not shown).

[0024] In a specific embodiment, the speckle dynami...

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Abstract

The invention discloses a vision measurement device of a sheet forming limit curve. The vision measurement device comprises a dynamic speckle strain measurement system and a cupping forming tester, wherein the dynamic speckle strain measurement system comprises a binocular stereoscopic measuring head (1); and the cupping forming tester comprises a measuring head bracket (2), an integrated rack (3), a cupping forming stamping device (4) and a built-in punching machine. The vision measurement device can perform high-precision measurement to obtain high-precision material data, can rapidly obtain the measurement results and is low in cost.

Description

technical field [0001] The invention belongs to the field of mechanical processing, and in particular relates to a visual measuring device for sheet metal forming limit curves. Background technique [0002] The Forming Limit Curve (FLC), also known as the Forming Limit Diagram (FLD), is used to determine the degree of deformation that a specified material can achieve when it is stretched, bulging, or a combination of stretching and bulging. Sheet metal forming limit curve FLC is an important index data of sheet metal forming. It is extremely troublesome to obtain FLC with traditional measuring devices. [0003] The disadvantages of the traditional method include: (1) the curves where various strains occur should be located, but this will take a lot of time (many tests are done for each width); (2) the curves need to be changed after fracture; (3) the simulation The difference between the two curves needs to be compensated, and a certain margin must be given; (4) Some materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/28
Inventor 梁晋魏斌张东东郭翔于淼
Owner XI AN JIAOTONG UNIV
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