Complex Curved Surface With The Springback Control Compendation Research In Hollow Blade

Sheet metal stamping forming in many industries are widely used in the process, andproduced by the main three types defects are wrinkling, and rupture and springback, reboundin recent years is the most research problem, but also is the research difficulties, it seriouslyaffected the sheet metal forming parts of shapes and sizes precision. At present, theproduction process is often used repeatedly repair mould, try to determine the mode of moldtype way shape, but so repeatedly repair moulds, the testing moulds running efficiency toolow, design the cycles of time is long, the cost is high, especially complex curve of parts,repair time needed for moulds is longer, it is not suitable for modern quick die design andproduction of manufacturing. The finite element numerical simulation technology andcomputer of development, it makes that the researchers can accurately forecast the springbackquantity and quantity of the corresponding to the springback compensation is possible, itmakes repair mould and try mould in the computer, so greatly reduced the repair mode and trymode time needed for the process, which can reduce the mould manufacturing cost, shortennew mould design and development time cycle.This paper makes a study of the hollow leaves of the steam turbine blade stamping die designof the mould, use CAE plate stamping analysis software is Dynaform, of hollow bladestamping the corresponding stamping simulation and its forming quality analysis, springbacksimulation and springback compensate.The research content as follows:First the process parameters those Affect the resilience quantity size are orthogonal testanalysis in the stamping mould system, these is for optimization of process parameters andseek blades forming quality optimal and springback minimum amount. This paper compares ablank holder force model and freedom to the forming of bending forming effect. This leavesthe forming of bending forming is shallow tensile, it is no difference between the blank holderforce model and freedom to the forming of bending, so the article in the forming of the bladeway adopts the free bending forming. Adopting the stamping process optimal parameters,After complete simulation,making the information analysis about stamping forming resultsunder the optimized conditions,mainly analysis of the blade in the forming process of formingdefects will appear and after forming parts you could meet the stiffness use requirementthrough its forming limit diagram, stress cloud images and materials such as the quantitythinning,in shallow tensile free press bending forming condition, leaf forming basic won’tappear cracking defects, material accumulation phenomenon or is corrugate may appear.Afterthe analysis of the content, the springback size needs for parts to calculate,In post-processingmodule Dynaform,cut online distribution of springback quantity can be seen,then make moldthe springback compensation,in the unloading of parts after springback shape comply withthe design requirements, compensation method is used in the software compensation and thenode ineremental compesation method, that is the combination of the way. Example shapemeasuring parts, the joint arm type of three coordinates measuring instrument, compared tostandard parts, and the measurement of the quantity of the leaves of the rebound. In the end, the essay compensation after the blade mould surface mold in3d modeling software UG inparametric design, use the parametric design purpose is able to quickly to mold on the3dmodel.