Noktasal dövmenin sonlu elemanlar modellemesi

Peen Forming is a type of controlled deformation that can be managed through residual stress for a workpiece forming process. This process is typically applied using metallic, ceramic, or laser shots called impact. The main principle is the same for all peening methods. Instead of others, the Needle Peen Forming (NPF) has preferable properties in respect to optimizing the process and high energy efficiency. This research aims to create an experimental setup to define the effects of NPF on the different thicknesses and, different indentation depths of SAE1070 steel Almen strip type A and type C under different working pressures and, to compare the experimental setup with the FE analysis model. The saturation points and the arc heights of strips were exposed to 6 different indentation depth ratios under 4 different pressures. The plastic deformations on the Z-axis ( arc heights ) of workpieces were quantified by a comparator probe that assembled a CNC milling machine's head. A maximum 5.7% difference in arc height was observed between the results of FE modeling and experimental studies. The presented NPF methodology with one needle by multiple impacts proves possible to estimate the last concavity and arc height of sheet metal surface profile. The results prove the convexity of the workpieces can manage by changing the compressed stress at the center of the impact.