The Experts below are selected from a list of 24 Experts worldwide ranked by ideXlab platform
S. Kumar - One of the best experts on this subject based on the ideXlab platform.
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Optimization of the nibbling operation on an NC turret Punch press
International Journal of Production Research, 1998Co-Authors: D. Veeramani, S. KumarAbstract:The fabrication of sheet metal parts on an NC turret Punch press is accomplished by first Punching the desired holes in the parts nested on the sheet stock followed by nibbling the boundaries of the parts in order to separate them from the sheet. This paper addresses the problem of minimization of the total time taken for the nibbling operation for a given sheet configuration of nested parts. Finding a solution to this problem requires the solution of two coupled sub-problems, namely the part sequence determination problem and the pierce point determination problem. In this paper, we present two approaches to optimizing the nibbling operation and discuss their performance on sample data sets. The incorporation of the proposed optimization scheme within CAD/CAM systems will lead to reduced processing times and more effective utilization of NC turret Punch Presses.
Wayne D Causey - One of the best experts on this subject based on the ideXlab platform.
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a procedure for scheduling Punch Presses with restrictions on the sequence of Punches
International Journal of Production Research, 1990Co-Authors: Wan S Shin, Stanley F Bullington, Wayne D CauseyAbstract:SUMMARY Procedures for generating efficient schedules for Punch Presses are examined. Technological restrictions force certain groups of holes to be Punched sequentially. The proposed methodology is a heuristic procedure which breaks a problem into sub-problems, and solves a travelling salesman problem for each of the sub-problems. Three methods for choosing the starting and ending nodes for the sub-problems are investigated. Computational experience involving the solution of 58 actual industrial Punch patterns using a personal computer is presented.
A Wlrakusumah - One of the best experts on this subject based on the ideXlab platform.
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product batching and batch sequencing for nc Punch Presses
International Journal of Production Research, 1993Co-Authors: Surya D Liman, A WlrakusumahAbstract:This paper proposes a two-stage practical product batching and batch sequencing algorithm for NC Punch Presses used in the production of precision sheet metal electronics components. The first stage of the algorithm batches a given set of products in order to maximize the number of products in a batch as well as the tool magazine utilization. In this stage, tool magazine constraints such as number of available slots, size of slots, tool configurations and tool locations are taken into consideration. The resulting batches are passed to the second stage of the algorithm which sequences these batches. The sequencing is done by using the ‘ nearest neighbour’ heuristic for the ‘ travelling salesman problem’ Comparison of the new method with the procedure previously used by a manufacturer of such components demonstrated a significant reduction in setup times.
D. Veeramani - One of the best experts on this subject based on the ideXlab platform.
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Optimization of the nibbling operation on an NC turret Punch press
International Journal of Production Research, 1998Co-Authors: D. Veeramani, S. KumarAbstract:The fabrication of sheet metal parts on an NC turret Punch press is accomplished by first Punching the desired holes in the parts nested on the sheet stock followed by nibbling the boundaries of the parts in order to separate them from the sheet. This paper addresses the problem of minimization of the total time taken for the nibbling operation for a given sheet configuration of nested parts. Finding a solution to this problem requires the solution of two coupled sub-problems, namely the part sequence determination problem and the pierce point determination problem. In this paper, we present two approaches to optimizing the nibbling operation and discuss their performance on sample data sets. The incorporation of the proposed optimization scheme within CAD/CAM systems will lead to reduced processing times and more effective utilization of NC turret Punch Presses.
Zhao Shengdu - One of the best experts on this subject based on the ideXlab platform.
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dynamic characteristics research of different working mechanism of turret Punch Presses
Machine Tool & Hydraulics, 2014Co-Authors: Zhao ShengduAbstract:The working principle and advantages and weaknesses of traditional crank-slide mechanism used by the turret Punch Presses were analyzed briefly. The principle and advantages of knuckle mechanism were elaborated. Based on the background of application research of high-speed turret Punch Presses with 20 kN nominal pressure,25 mm slide stroke,4 mm slide block nominal pressure stroke,three different kinds of knuckle mechanisms were designed,and their kinematics models were built respectively. Then each structure size for the three different kinds of working mechanisms was gotten respectively through the optimization by computer,with 25 mm slide stroke as a condition of constraints and by the optimal aim of achieving minimum of their max slide velocity in their4mm slide block nominal pressure stroke. And then their 3D structural models were built up,and their different parameters were analyzed and compared including the slide displacement,velocity and slide acceleration,and so on. The analysis results show that the synthetic performance of the"link curve"type of six-bar linkage among these three kinds is the best.
