A Digital System Implement for Aircraft Sheet Metal Cutting

2011 ◽  
Vol 110-116 ◽  
pp. 1637-1642
Author(s):  
Chang Liang Lai ◽  
Chuang Liu ◽  
Xian Jie Zhang
Keyword(s):  
Path Planning ◽  
Sheet Metal ◽  
Metal Cutting ◽  
Digital System ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Cutter Path ◽  
Doubly Curved ◽  
Cutting Path ◽  
Sheet Metal Cutting

For aircraft sheet metal parts digital cutting, this paper uses IDEF0 to structure a digital system integrated with unfolding module, nesting module, cutting path planning module and NC cutting module, then analyzes data organization and process of the system application. In the system, an algorithm for the development of a doubly curved surface onto a plane is adopted, NC cutting process-oriented nesting algorithm is presented and rules of cutter path planning is developed. Furthermore, application examples of key technologies (unfolding, nesting, path cutter planning) are demonstrated and indicate that the system can realize digital cutting for aircraft sheet metal parts quickly and precisely.

Path Planning For Robotic Polishing of Sheet Metal Parts

2021 ◽  
Author(s):  
Yuezhi (Sean) Liu ◽  
Fengfeng (Jeff) Xi ◽  
Reza Faieghi
Keyword(s):  
Path Planning ◽  
Sheet Metal ◽  
Contact Force ◽  
Optimal Path ◽  
Surface Shape ◽  
Free Form ◽  
Metal Parts ◽  
Contact Areas ◽  
Sheet Metal Parts ◽  
Free Form Surface

Abstract Unlike solid parts, the deformation caused by a contact force during robotic polishing of sheet metal parts has become an issue. In this paper, a path planning method is purposed to resolve this issue. This method includes three steps. The first step is to apply the Hertz theory to compute the contact areas between the tool head and the free-form surface of a sheet metal part. The second step is to apply the finite element method to compute the deformation under a contact force. The third step is to reconstruct the deformed free-form surface and modify the contact areas accordingly. The underlying problem is dynamic because the deformed surface shape changes as the tool head moves along a tool path. Based on the proposed method, an optimal path can be determined to achieve full coverage of the entire surface without over or under polishing.

Burr Formation in Metal Cutting Operations and some Deburring Methods

2013 ◽  
Vol 581 ◽  
pp. 235-240
Author(s):  
János Kodácsy ◽  
András Szabó
Keyword(s):  
Production Process ◽  
Sheet Metal ◽  
Metal Cutting ◽  
Burr Formation ◽  
Formation Mechanisms ◽  
Mechanical Process ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Quality Of Products

Remained burrs on edges of the parts after metal cutting operations may cause many problems in the production process and in the quality of products, therefore the burrs must be completely removed. In the paper, the authors give an outline of the elements and the technical and economical influences of the burr formation, and the characteristics of the burrs and the burr formation mechanisms. The authors present some special processes that are suitable for deburring of small pieces (e.g. Magnetic Abrasive Deburring), and a frequently applied mechanical process: power brushing. The authors have carried out many investigations regarding the magnetic abrasive deburring of small, blanked sheet metal parts, furthermore the machine deburring of large-sized metal workpieces by carbide-reinforced cylindrical brushes. The detailed conditions, data, results and conclusions of these deburring experiments are treated in the paper too.

Structural Synthesis of Sheet Metal Parts: An Analogy to Path Planning Using Manufacturability As a Guide

1989 ◽  
Author(s):  
P. V. Graham ◽  
K. T. Ulrich
Keyword(s):  
Path Planning ◽  
Sheet Metal ◽  
Solution Space ◽  
Planning Problem ◽  
Structural Synthesis ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Overall Design ◽  
Problem Description ◽  
Path Planning Problem

Abstract The structural synthesis of sheet metal parts can be viewed as a path planning problem. A design is represented by a path that links the start points and goal points while avoiding all obstacles. Techniques used in robot motion planning have proven capable of generating paths through obstacle filled space. Given a problem description, these techniques make it possible to create a variety of initial design candidates, each of which represents a family of topologically distinct designs. These topologically distinct designs partition the solution space. For each family, gradient search techniques based on manufacturability and functionality can be used to obtain a good design within that family. A good overall design is obtained by comparing the designs selected from each family. Although this work is still preliminary, we have written a prototype program for solving two-dimensional problems, and have used it to explore the properties of the design space.

scholarly journals Application of Multi-Contour Cutting in Algorithms for Solving the Cutting Path Problem

2021 ◽  
Vol 346 ◽  
pp. 01015
Author(s):  
Anastasiia Tavaeva ◽  
Aleksandr Petunin ◽  
Efim Polishchuk
Keyword(s):  
Sheet Metal ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Cutting Equipment ◽  
Cutting Path ◽  
Sheet Metal Cutting

The cutting path problem for CNC sheet metal cutting equipment is considered in this article. The method of multi-contour cutting application is described for solving Cutting Path Problem (CPP). The method is to be combine contours in «blocks» (groups) and cutting of several contours is performed by using special cutting techniques (common cut, «chained» cutting) in order to reduce values of cutting tool length and number of piercings compared with standard cutting technique (where only idle path is minimized) The article presents results of solving cutting path problem computing experiments using proposed method (multi-contour cutting with common cut) and algorithm CCP-Relax (in which the standard cutting technique is used). The examples of testing are performed by using several instances from Library CPPLib.

Experimental and Numerical Analysis of Blanking for Thin Sheet Metal Parts

2001 ◽  
Vol 4 (3-4) ◽  
pp. 319-333
Author(s):  
Vincent Lemiale ◽  
Philippe Picart ◽  
Sébastien Meunier
Keyword(s):  
Numerical Analysis ◽  
Sheet Metal ◽  
Thin Sheet ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Thin Sheet Metal

Design and development of automatic sheet metal cutting machine

2020 ◽  
Author(s):  
R. Muthu Siva Bharath ◽  
Arunkumar Gopal ◽  
I. Maria James ◽  
S. Lakshmi Sankar
Keyword(s):  
Sheet Metal ◽  
Metal Cutting ◽  
Metal Cutting Machine ◽  
Design And Development ◽  
Cutting Machine ◽  
Sheet Metal Cutting
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