Abstract
Multi-point forming (MPF) is an advanced flexible manufacture technology, and the technology results from the idea that the whole die is separated into small punches that can be adjusted height. This idea is applied to the traditional rigid blank-holder, so flexible blank-holder (FBH) idea can be obtained. In this work, the performance of a multi-point die is investigated with pins in square matrix and suitable blank holder. Each pin in the punch holder can be a significant moved according to the die high and at different load that applied with spring with respect to spring stiffness. The results shows the reduction in setting time with respect to traditional single point incremental forming process that lead to (90%). and also show during the forming process, the deformation of the interpolator can induce a shape error in the formed work-piece and the blank holder can reduce/eliminate dimples that sometimes arise in the work-piece. The minimum force applied using multi-point die is 28.556KN, while the load when complete the forming process is 30.8KN that caused displacement of die to 32.8mm.
Highlights
The application of sheet metal forming in aerospace, automotive, medical, and recently in renewable energy is widely used
Each pin is vertically aligned according to the part geometry in matrix form; Figure (1) illustrated the multi-point process [2]
In this context, controlling the height of each pin is one of the main technological problems which assures the geometry of the part and avoids in general the dimpling phenomenon when Rubber multi-point forming (RMPF) without interpolator is applied
Summary
The application of sheet metal forming in aerospace, automotive, medical, and recently in renewable energy is widely used. The traditional sheet metal forming processes like the deep drawing and stamping are more adjustable to continue production, customized products, small batch and high value-added, the employment of traditional process would results long lead time, high-energy consumption, and high tooling costs. To release these limitations, the flexible sheet metal forming process concept that aimed to reduce energy consumption, incurred cost, the lead time, and has attracted significant research attentions in recent years, multi-point forming (MPF) and incremental sheet forming (ISF) are two typical flexible sheet metal forming approaches[1]. There are many researchers who have designed die in this field but with fixed die according to the product form and there is no researcher dealing with flexible die design: Tahseen Fadhel Abaas
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