Exploration of Evolutionary Path Planning of Part Handling in Sheet Metal Bending

2003 ◽  
Author(s):  
Xiaoyun Liao ◽  
G. Gary Wang
Keyword(s):  
Path Planning ◽  
Sheet Metal ◽  
Motion Path ◽  
Sheet Metal Part ◽  
Metal Part ◽  
Sheet Metal Parts ◽  
Detection Algorithms ◽  
Shaped Part ◽  
Bending Sequence

While the bending sequence planning has been intensively studied, design of the motion path of a sheet metal part in the bending operation tends to be ignored by researchers. Because during the bending operation, the space for maneuvering a sheet metal part is very small, collisions between the part and bending tools are likely to occur. When a robot is used to handle the part, the role of an automatic path-planning tool becomes more significant. In this study, an evolutionary pathplanning approach for robot-assisted handling of sheet metal parts in bending is proposed and implemented. The proposed approach globally searches the motion path space to identify feasible paths. Collision detection algorithms based on segment intersection are used to check the feasibility of the generated paths. This method can automatically design feasible handling operations for a robot. A simulation example on a simple “V” shaped part demonstrates that the approach is efficient and practical.

Critical Tolerance Oriented Process Planning in Sheet Metal Bending

1999 ◽  
Vol 121 (1) ◽  
pp. 136-144 ◽  
Author(s):  
M. Shpitalni ◽  
B. Radin
Keyword(s):  
Sheet Metal ◽  
Process Planning ◽  
Tolerance Analysis ◽  
Automatic Determination ◽  
Sheet Metal Part ◽  
Metal Part ◽  
Precedence Graph ◽  
Metal Products ◽  
Bending Sequence

Although bending is one of the final processes in sheet metal part manufacture, it is relatively inaccurate compared to the other components of sheet metal processing. Critical tolerances at several locations on the sheet metal part impose limitations on bending operations and sequences. The lack of success up to now in embedding accuracy in process planning for sheet metal products has resulted mainly from the fact that tolerance analysis usually requires simulating the manufacturing process. This paper discusses the issue of automatic determination of the bending sequence in sheet metal products subject to critical tolerance constraints. It proposes conditions for identifying cases where the problem of determining the bending order which results in the best accuracy at specific locations is, in fact, a topological problem. Two explicit rules for achieving the best accuracy in such cases are formulated and then demonstrated by using these rules to construct a precedence graph.

A Framework for Sheet Metal Part Design and Manufacturing Assessment

1992 ◽  
Author(s):  
Tung-Ting Yu ◽  
Yuh-Min Chen ◽  
R. Allen Miller ◽  
Gary L. Kinzel ◽  
Taylan Altan
Keyword(s):  
Knowledge Base ◽  
Sheet Metal ◽  
Sheet Metal Part ◽  
Metal Part ◽  
Design Assessment ◽  
Sheet Metal Parts ◽  
Design And Manufacturing ◽  
On Line ◽  
Assessment Environment ◽  
Line Design

Abstract In this paper, the framework for a sheet metal part design and manufacturing assessment environment is presented. Based on an investigation of the characteristics of sheet metal part design, form feature methodology is employed to facilitate design and provide information for assessment. The tasks, rules, and the significant items for manufacturing assessment are identified and formalized into a knowledge base with object-oriented techniques. The knowledge base is used for design assessment including evaluation for compatibility with press-working processes, modification of preliminary designs into better ones given cost considerations, and evaluation to avoid defects and failures. To support on-line design evaluations, a part model is constructed by extracting the required feature and connectivity data from a CAD database. The research is concentrated on box-type sheet metal parts primarily made by cutting (e.g., shearing, blanking, punching, etc.), bending, flanging, and local stretching. These parts are produced by both stampers and fabricators.

Methods of Metal Parts Unfolding

2014 ◽  
Vol 989-994 ◽  
pp. 3310-3313
Author(s):  
Yang Li ◽  
Jie Gang Zhang ◽  
Ji Guang Li ◽  
Yu Chen Li
Keyword(s):  
Sheet Metal ◽  
Metal Structure ◽  
Body Structure ◽  
Sheet Metal Part ◽  
Metal Part ◽  
Metal Parts ◽  
Sheet Metal Parts

There are a variety of sheet metal parts in rocket body structure. The exact length calculation of sheet metal structure work is the key to ensure better quality of product. This paper describes two methods of sheet metal part unfolding which are method of formula and method of software. Two quick unfolding ways using AUTOCAD and EXCEL are described aim at method of formula. Summarize the notes of using Pro/E to unfold aim at method of software. span>Parts Unfolding

Numerical Investigation on the Process of Stretch-Forming Based on Discretely Loading for Spherical Sheet Metal Parts

2013 ◽  
Vol 816-817 ◽  
pp. 682-685 ◽  
Author(s):  
Zhong Yi Cai ◽  
Mi Wang ◽  
Zhen Yang ◽  
Kun Peng
Keyword(s):  
Sheet Metal ◽  
Equivalent Stress ◽  
Three Dimensional ◽  
Equivalent Strain ◽  
Stretch Forming ◽  
Sheet Metal Part ◽  
Metal Part ◽  
Forming Process ◽  
Sheet Metal Parts ◽  
New Process

Stretch-forming based on discretely loading is a new process for manufacturing three-dimensional sheet metal part, the stretching load is applied at discrete points on the two ends of sheet metal, by controlling the loading trajectory at each discrete point, an optimal stretch-forming process can be realized, and the formed surface with the strains and stresses more uniformly distributed are obtained so that the forming defect can be avoided. The numerically investigated results on the stretch-forming process of spherical sheet metal part show that, comparing with the traditional stretch-forming, the equivalent strain in the new process is reduced by approximately 30% and equivalent stress reduced by 10%, the range of the strain and stress distributions are reduced by approximately 30%.

A New Stretch-Forming Process Based on Loading at Discrete Points and its Numerical Investigation

2013 ◽  
Vol 423-426 ◽  
pp. 737-740
Author(s):  
Zhong Yi Cai ◽  
Mi Wang ◽  
Chao Jie Che
Keyword(s):  
Sheet Metal ◽  
Three Dimensional ◽  
Discrete Point ◽  
Stretch Forming ◽  
Sheet Metal Part ◽  
Metal Part ◽  
Forming Process ◽  
Loading Trajectory ◽  
New Process ◽  
Forming Defects

A new stretch-forming process based on discretely loading for three-dimensional sheet metal part is proposed and numerically investigated. The gripping jaw in traditional stretch-forming process is replaced by the discrete array of loading units, and the stretching load is applied at discrete points on the two ends of sheet metal. By controlling the loading trajectory at the each discrete point, an optimal stretch-forming process can be realized. The numerical results on the new stretch-forming process of a saddle-shaped sheet metal part show that the distribution of the deformation on the formed surface of new process is more uniform than that of traditional stretch-forming, and the forming defects can be avoided and better forming quality will be obtained.

scholarly journals Topology Optimization of Automotive sheet metal part using Altair Inspire

2020 ◽  
Vol 5 (3) ◽  
pp. 143-150
Author(s):  
Netsanet Ferede
Keyword(s):  
Topology Optimization ◽  
Sheet Metal ◽  
Optimization Problem ◽  
Optimal Solution ◽  
Sheet Metal Part ◽  
Metal Part ◽  
Solution Quality ◽  
Design Engineers ◽  
Automotive Sheet ◽  
Reduced Costs

In an optimization problem, different candidate solutions are compared with each other, and then the best or optimal solution is obtained which means that solution quality is fundamental. Topology optimization is used at the concept stage of design. It deals with the optimal distribution of material within the structure. Altair Inspire software is the industry's most powerful and easy-to-use Generative Design/Topology Optimization and rapid simulation solution for design engineers. In this paper Topology optimization is applied using Altair inspire to optimize the Sheet metal Angle bracket. Different results are conducted the better and final results are fulfilling the goal of the paper which is minimizing the mass of the sheet metal part by 65.9%  part and Maximizing the stiffness with Better Results of Von- Miss Stress Analysis,  Displacement, and comparison with different load cases.  This can lead to reduced costs, development time, material consumption, and product less weight.

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.

scholarly journals IDS-DLA: Sheet Metal Part Identification System for Process Automation Using Deep Learning Algorithms

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 127329-127342
Author(s):  
Ruey-Kai Sheu ◽  
Yuan-Cheng Lin ◽  
Chin-Yin Huang ◽  
Lun-Chi Chen ◽  
Mayuresh Sunil Pardeshi ◽  
...  
Keyword(s):  
Deep Learning ◽  
Sheet Metal ◽  
Learning Algorithms ◽  
Identification System ◽  
Process Automation ◽  
Sheet Metal Part ◽  
Metal Part

A new rotary forming process for rim thickening of a disc-like sheet metal part

2012 ◽  
Vol 212 (11) ◽  
pp. 2247-2254 ◽  
Author(s):  
Jun-Song Jin ◽  
Lei Deng ◽  
Xin-Yun Wang ◽  
Ju-Chen Xia
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Part ◽  
Metal Part ◽  
Forming Process
Sign in / Sign up

Export Citation Format

Share Document