Wide and thick plate flattening and straightening method based on three-dimensional curved surface theory
A three-dimensional curved surface, wide and thick plate technology, applied in the field of wide and thick plate straightening, can solve the problem of not being very accurate, and achieve the effect of improving the effect and improving the working efficiency.
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Embodiment 1
[0032] refer to Figure 1-6 As shown, a flattening and straightening method for wide and thick plates based on the three-dimensional surface theory includes the following steps:
[0033] S1, to obtain the data of wide and thick plates: the thickness is δ, the width is b, and the elastic modulus E when the material is deformed and strengthened is not considered 0 , considering the strengthening modulus E when the material is strengthened 1 ;
[0034] S2, use structured light or binocular vision camera to identify the warping shape of the local area of the wide and thick plate sent to the flattening machine, define the forward direction of the plate as the x-axis, the width direction of the plate as the y-axis, and the origin of the coordinates is located on the rectangular plate Center O point, and obtain discrete points of wide and thick plates;
[0035] S3, the discrete points obtained in step S2 are fitted with a three-dimensional surface using the least square method t...
Embodiment 2
[0043] In actual use:
[0044] S1, obtain the data of the wide and thick plate to be straightened: the thickness is δ, the width is b, regardless of the elastic modulus E when the material is deformed and strengthened 0 , considering the strengthening modulus E when the material is strengthened 1 ;
[0045] S2, use structured light or binocular vision camera to identify the warping shape of the local area of the wide and thick plate sent to the flattening machine, define the forward direction of the plate as the x-axis, the width direction of the plate as the y-axis, and the origin of the coordinates is located on the rectangular plate Center O point, and obtain discrete points of wide and thick plates;
[0046] S3, the discrete points obtained in step S2 are fitted with a three-dimensional surface using the least square method to obtain the local surface contour surface equation of the wide and thick plate z=f(x, y), and then calculate the partial derivative of the surfac...
Embodiment 3
[0060] by Figure 5 Take warped wide and thick plate as an example, plate thickness δ=10mm, width b=2000mm, density ρ=7850kg / m 3 Elastic modulus E 0 =2.06×10 11 Pa, strengthening modulus E 1 =5×10 7 Pa, yield limit material yield strength σ s = 235MPa. The length × width of the action area of the flattener is 3500mm wide and 2000mm long with the center point of the flattener as the origin. s =4000mm, the schematic diagram of the scope of flattening machine and the distribution area of wide and thick plates is as follows Figure 4 .
[0061] Table 1 shows the coordinate points of wide and thick plates passing through the visual identification mechanism. Calculation of Limit Value of Elastic Bending Curvature of Wide and Thick Plates The surface equation obtained by fitting the least square method is as follows: f(x,y)=a f (x-80)(x+80)+b f (y-50)(x+40), where a f =-1×10 -5 , b f =-1×10 -4 . Computing the partial derivatives of the surface equation gives ...
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