A method for measuring springback after stamping and forming of sheet metal
A technology of stamping forming and measuring method, applied in the field of stamping and forming springback, can solve the problems of die wear, springback amount error, the degree of difference cannot be accurately estimated, etc., to achieve the effect of easy operation and high measurement accuracy
Active Publication Date: 2021-01-01
TANGSHAN IRON & STEEL GROUP +1
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[0003] The Chinese patent application number is CN103191958 A, which discloses "An Optical Detection Method for Sheet Springback". This method uses a combination of photogrammetry and surface scanning to detect the springback amount of the workpiece. The shape is expressed in the form of measured point cloud, but the shape before springback is expressed in CAD digital model, which is the state of the initial design of the part. As the number of times increases, the mold wears out, so that there is a certain difference between the shape of the part before springback and the CAD digital model of the initial design, and the degree of difference cannot be accurately estimated, which leads to the error of the springback measured by this method
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[0019]In the following, the present invention will be further described through embodiments in conjunction with the drawings.
[0020]In this embodiment, a common V-shaped piece is bent and rebounds.
[0021]A method for measuring the springback amount of sheet metal after forming. A 3D laser scanner is used to obtain the three-dimensional coordinate point cloud of the die surface of the stamping die and the part after springback, and then the comparison measurement is performed in the software without other auxiliary equipment. Measure the springback amount of parts with different types and different springback methods in any position and direction.
[0022]Specific steps are as follows:
[0023](1) Install and debug the mold for V-shaped bending, select the required round corner size of the convex and concave mold, adjust the mold gap, and perform punching to obtain a good-shaped, defect-free V-shaped bending part.
[0024](2) Disassemble the mold and turn it upside down to remove the iron filin...
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The invention discloses a measurement method of rebounding amount after plate stamping forming and belongs to the technical field of stamping forming rebounding. The technical scheme is as follows: the die surface of a to-be-stamped part and a rebounded part are scanned through a 3D laser scanner, three-dimensional space coordinate point clouds of a die and a part after stamping forming and rebounding are obtained and are compared in software, and thus the rebounding amount of the part in any position in any direction can be obtained. The measurement method is applied to parts obtained throughdie stamping and is not limited by materials, surface qualities, shapes, sizes and the like, extra machining of a checking tool is not needed, the measurement accuracy is high, the cost is low, operation is simple, and measurement is convenient and fast.
Description
Technical field:[0001]The invention relates to a method for measuring the springback after sheet metal stamping and forming, in particular to a method for measuring the springback by combining laser scanning and software analysis, and belongs to the technical field of stamping and forming springback.Background technique:[0002]Sheet stamping is a processing method that uses molds to plastically deform the sheet to obtain the required shape and size of parts. It has high production efficiency, low processing cost, and simple operation, and is widely used in the field of automobile manufacturing. According to statistics, in the automobile manufacturing industry, about 60%-70% of automobile parts are formed by sheet stamping. The forming quality of the parts directly affects the appearance of the automobile and the assembly of the entire vehicle, thereby affecting the manufacturing cost of the entire vehicle And the development cycle. Since stamping is a very complex process, it is easy...
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IPC IPC(8): B21C51/00G01B11/16
CPCB21C51/00G01B11/16
Inventor张茜杜雁冰吕浩王秋雨张赛娟牛星辉齐建群孟根巴根李立铭
OwnerTANGSHAN IRON & STEEL GROUP