A method for testing the flanging springback characteristics of high-strength steel plate
A technology of high-strength steel plate and springback characteristics, which is applied in the field of testing high-strength steel plate flanging springback characteristics, can solve the problems of flanging limit and flanging springback, etc., to reduce mold cost, improve test efficiency and flexibility, positioning high precision effect
Active Publication Date: 2016-01-27
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology
[0008] In summary, the existing technology is a mold developed for the flanging process of steel plates or high-strength steel plates, and the mold is suitable for one steel plate thickness, and ultra-high-strength steel plates of different thicknesses can be bent under different bending radii on a set of molds. The flanging limit and flanging rebound are not seen
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[0036] Below, the present invention will be described in detail with reference to the accompanying drawings.
[0037] The connection relationship of each part of the mold is: the punch 1 is fixedly installed on the piston of the main cylinder, and there are two pin holes for fixing the punch 1, one is a circular pin hole 11, and the other is an elliptical pin hole 12, so that the punch The positioning is more convenient. The blank holder body 2 is connected with the lower workbench through the pressure ring 7. The positioning pin 3 is installed and pressed into the binder ring body 2. The die body 4 is connected with the upper workbench through the press ring 7. Set on the die There are fastening screw holes 10, the die inserts 5 and 6 are locked on the die body 4 by screws, the precision gasket 8 is installed between the die insert 5, the die insert 6 and the die body 4, The die body, die insert and precision gasket are connected by fastening screws; when the die is installed...
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Abstract
The invention discloses a method and a die for testing high-strength steel plate turnup rebounding characteristics. The method includes the steps of mounting, testing and calculating. The die comprises a concave die, an edge pressing ring arranged on the concave die, and a convex die matched with the concave die, the concave die comprise a concave die body, a concave die insert and a gasket, the concave die insert is arranged on the concave die body, the gasket is arranged between the concave die body and the concave die insert, fillet radius of the concave die insert is adjustable, and thickness of the gasket is adjustable. By the method and the die, testing of turnup limit and turnup rebound of ultrahigh-strength steel plates different in thickness under different bending radiuses can be realized on a set of the die, so that cost is lowered effectively, and an experimental basis is provided for cracking control and part die design.
Description
technical field [0001] The invention relates to the technical field of metal plastic processing and moulds, in particular to a method for testing the flanging springback characteristics of high-strength steel plates. Background technique [0002] Energy saving, environmental protection, safety, comfort and intelligence are the general trend of the development of automobile technology in the world today, among which, automobile lightweight is the main measure for energy saving. The use of ultra-high-strength steel plates with a tensile strength ≥ 780 MPa is currently the most economical and effective way to reduce weight, which has become a consensus in the industry. [0003] However, due to the high strength of the ultra-high-strength steel plate, problems such as easy cracking during forming, large springback and easy wear of the mold have been brought about during the stamping process. At present, the flanging of body structural parts represented by cross beams and door s...
Claims
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IPC IPC(8): B21D37/10B21D19/00B21C51/00
Inventor 刁可山谢坚强王利
Owner BAOSHAN IRON & STEEL CO LTD