The purpose of the work is to establish main causes defects by ultrasonic testing (UST) experimental forgings made high-alloyed austenitic steel 08Kh18N10T on basis comprehensive comparative studies samples defective and suitable forgings. Techniques. Chemical analysis was performed a high-sensitivity spectrometer "SPECTROMAX" company "SPECTRO", Germany; macro- microstructure (liquation heterog...

To ensure a more uniform forging distribution microstructure and improve the service performance of aeroengine disk parts, an automated preform design method is proposed for integrated shape optimization based on non-uniform rational B-spline (NURBS) curve, finite element method, genetic algorithm (GA). First, random graph automatically constructed by NURBS curve criterion. The volume complexit...

Abstract Forgings are produced in several process steps, the so-called forging sequence. The design of efficient sequences is a very complex and iterative development process. In order to automate this reduce time, method presented here, which automatically generates multi-stage for different geometries on basis component geometry (STL file). was developed closed die forging. individual modules...

There are a wide range of physical defects which occur during metal forming processes. These defects, which may occur on the surface or be internal, are undesirable not only because of the surface appearance, but because they may adversely affect the strength, formability and other manufacturing characteristics of the material. Some physical defects in metal forming processes such as rolling an...

Cooperating with heavy forging press, the heavy-duty forging manipulator is used for handling the workpiece during the free-forging process. Therefore, the size accuracy of the forgings is related to the dynamics performance of the forging manipulator. This paper aims to study the dynamic performance of DDS heavy-duty forging manipulator. The kinematics model is firstly built to predict the tra...

Automobiles are required to be even lighter for further achieving environmental protection through fuel economy improvement, as well as safety feature enhancement and drivability improvement. Automotive suspensions are also required to reduce their weight and thus more aluminum is being adopted. Aluminum forgings, in particular, are often applied because of their significant weight reduction ef...