Determination of Technological Forces in the Incremental Forming Process

Abstract

The paper presents a joint theoretical and experimental approach to determine the technological forces within the asymmetric single point incremental forming ASPIF process, based upon a theoretical model, image processing and data acquisition. The first step of this approach was to develop a theoretical model of the forces within the process, based upon the model of a mechanical feed drive of a CNC milling machine. By means of this model, relationships between the resistant torque at the motor spindle level and the technological force on the movement axis could be determined. Using an image processing method, which allowed the user to extract information within the machines operator panel and analytical relationships, the technological forces were determined. The results were compared with the measured values, obtained by means of a data acquisition system.

Using an Adaptive Network-based Fuzzy Inference System to Estimate the Vertical Force in Single Point Incremental Forming

“…The data form the operator panel of the CNC equipment were captured by a digital camera and afterwards the needed information was extracted and processed. The image processing method used in this approach was described in detail in [3].…”

“…1). The blank (2) is fixed by means of the blank holder (3). In order to realize the shape of the sheet metal part, one of the active elements, usually the punch (1) has an axial feed vertical movement direction, continuous or incremental (with the step s), while the other element, the active plate (4) carries out a plane horizontal movement.…”

Technological aspects regarding machining the titanium alloys by means of incremental forming

“…This experimental layout was successfully used before by the authors for some other incremental forming machining processes [7][8].…”

Study of the Formability of Laminated Lightweight Metallic Materials

“…Incremental forming, due to its high degree of flexibility, has been proven itself as machining process, mainly when producing parts in small batches or even prototypes [8][9]. One of the requirements when machining by incremental forming is that the formability of the workpiece must be known, consequently some specific tests, such as Nakajima test must be unfolded, to determine the forming limit curves of the processed material [10].…”