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RISReal Time Identification of Workpiece Material Characteristics From Measurements During Brakeforming
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A novel method is described to estimate the material characteristics of a sheet being bent in a pressbrake from punch force-displacement data. The method is simple enough to be used for real ...
An Adaptive Pressbrake Control for Strain-Hardening Materials
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An improved adaptive pressbrake control algorithm is described. The problem is to control the punch reversal position of the press so that the final unloaded angle of the bend remains unchanged ...
Pressbrake Bending in the Punch-Sheet Contact Region—Part 2: Gap Formation and the Direction of Sheet Motion
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In Part 1 of this paper, simple models of nonuniformities in pressbrake bending in the punch-sheet contact region were presented. An extreme manifestation of these nonuniformities is the appearance ...
Pressbrake Bending in the Punch-Sheet Contact Region—Part 1: Modeling Nonuniformities
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A simple model of pressbrake bending in the punch-sheet contact region is presented. The pressure and shear stress at the punch-sheet interface cause the stress distribution in the sheet to ...
Finite Element Method for the Analysis of a Material Property Identification Algorithm for Pressbrake Bending
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Finite element analysis is used to evaluate an algorithm to identify the material characteristics of a sheet being bent in a pressbrake from force and displacement measurements. In this way, ...
On the Plastic Deformation of a Tube During Bending
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The objective of this study is to develop an analytical approach to calculate the relationship between the axial curvature of a bent tube and the resulting deformation of the cross-section. ...
Distortion of U-Channel Sections in Plastic Bending
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: When a thin-walled U-channel section is plastically bent, considerable in-plane distortion occurs. The initially flat base of the U is deformed into a circular arc. The sides remain perpendicular ...
Bend Allowance and Developed Length Calculation for Pressbrake Bending
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Developed length refers to the length of the unstretched fiber measured over both bent and straight sections of a bent sheet. Bend allowance is a term coined by Sachs as a measure of the ...
An Efficient Algorithm for Shortest Path in Three Dimensions With Polyhedral Obstacles
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An algorithm to find the shortest path between two specified points in three-dimensional space in the presence of polyhedral obstacles is described. The proposed method iterates for the precise ...
An Adaptive Pressbrake Control Using an Elastic-Plastic Material Model
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An adaptive controller for a pressbrake has been designed, built, and tested. The controller measures force and displacement during the early part of the bend cycle to estimate workpiece ...