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Estimation of the Deep-Drawability of Aluminum Square Cups by Fracture Forces
Saiki, Hiroyuki,Marumo, Yasuo 대한금속재료학회(대한금속학회) 1998 METALS AND MATERIALS International Vol.4 No.3
Several fracture forces for the evaluation of the forming limit are investigated. The influence of flange lubrication, blank shapes, blank materials and tool shapes on the fracture forces is examined. The increase in the critical fracture force (the ability to sustain deep-drawing forces) is required for the improvement in the deep-drawability of square cups. Constant fracture force and transitional fracture force are used as target values for the increase in the critical fracture force. Both the fracture forces are independent of the blank shapes, and influenced by the flange lubrication, the blank materials and the tool shapes. The deep-drawability of square cups is evaluated by means of the fracture forces.
Slide-bending Formation of Thin Metal Sheet by Using Force Control
Hikaru Nishimura,Hiroshi Harada,Yasuo Marumo,Teruo Yamaguchi 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This paper describes slide-bending formation of thin metal sheet by using an industrial robot. The formation of parts made of very thin sheets has become increasingly important following the miniaturization of industrial products, including electrical and mechanical devices. A new process called a slide-bending formation was proposed. The authors have made an automatic slide-bending formation system which consists of an industrial robot, z-axis stage, a force sensor and a CCD camera. The bending formation of metal sheet made by stainless steel was investigated system atically. From the results of the experiment, it is shown that the trajectory of the z-stage was controlled so that the reactive force is kept constant. The bending angle of the thin metal sheet can be controlled by the applied load.
Slide-bending Formation of Metallic Sheet Using Neural Network
Masaki Hanazono,Hikaru Nishimura,Hiroshi Harada,Yasuo Marumo,Teruo Yamaguchi 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
This paper describes slide-bending formation of metallic sheet by using a neural network. The formation of parts made of very thin metallic sheets has become increasingly important miniaturizing industrial products, including electrical and mechanical devices. One of the authors proposed a new method called a slide-bending formation method for the bending of the metallic sheet. In this method, the shape of a metallic sheet after forming can be decided depending on various parameters. However, it is difficult to select optimal parameters. In order to solve this problem, we propose to use a neural network to determine parameters. From the results of the experiment, it is shown that both the bending angle and the curvature radius of the metallic foil can be controlled by the proposed method.