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Multi-head stretch forming(MHSF) is a new flexible technology for manufacturing sheet metal, and its multiple adjustable grippers substitute for integral structure grippers in the traditional stretch forming, it has the characteristics that these grippers can real-time adjust displacement and rotation according to variety of die curvature. The MHSF forming principle is introduced and corresponding...
Water jet incremental sheet metal forming is a new method of sheet metal forming. Based on the feature of forming, simulation model is established, mesh generation is carved up, boundary condition and constraint are set, deformation degree is calculated, and after deformation degree and stress analysis an experiment of water jet incremental sheet metal forming is done. By giving a test to forming...
Variety of board-fins are widely used in the industrial field, however, many problems such as technical complexity, fins falling, high rate of rejection, high cost and so on exist in the manufacturing methods available. In this paper, aiming at the problems existed in present methods, a new rolling technology used to shape board-fins was developed based on the traditional rolling principle. The forming...
Plasma-exposed Si surface related to Si recess in source/drain region was investigated in detail for various superposed bias configurations with frequencies of 13.56 MHz and 400 kHz. Two different bias powers were utilized by an inductively coupled plasma reactor (ICP). The surface layer (SL) and the interfacial layer between the SL and Si substrate (IL) were analyzed by spectroscopic ellipsometry...
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