The effect of major parameters such as side pressure P, and relative bending radius R/H on curvature springback ΔR is studied, the law of interaction between P, R/H, ΔR and distribution and changing of tangential strain in deformation area is obtained, and thus, a scientific base is provided for design and modification of die and selection of technological parameters.

The influence parameters such as relative bending radius and internal pressure had been researched.

The effects of different internal pressure, relative bending radius on the tube cross-sectional size and changes of wall thickness in typical points were studied respectively.

Analyses of the curvature radius of the cam outline in constant flow reciprocating pump;

Quantitative relation between decomposition rate and curvature radius of hump on phase diagram during binary chemical compound melting;

Linearity measuring mechanism of the curvature radius of sphere lens;

The autocollimating telescope method for determination of the radius of curvature and focal length of thin lens;

The Radius of Curvature at Any Point on the Profile of A Disk Cam with Oscillating Roller Follower——One Application of the Euler-Savary Equation;

Precision analysis of measurement of radius of curvature by interferometer

With the relation between curve radius before the plate is relapsed and curve radius after the plate is relapsed, on the theory basis we expound a concept to regard the exponent relation between the descent of upper unit and curve radius as a maths model of asymmetric three roll bender, and carry out research on its application.

In this paper the method of volving angle sensor measurement of curve radius is used to examine the plate forming curve in the process of forming and its′ principle and methodology is explained.

With the relation between curve radius before the plate is relapsed and curve radius after the plate is relapsed, on the theory basis we expound a concept to regard the exponent relation between the descent of upper unit and curve radius as a maths model of asymmetric three roll bender, and carry out research on its application.