Method for energy and resource balancing demonstrated as an example of the hot sheet metal production process

Abstract In this paper, we present an approach to recognize symmetries of bent sheet-metal parts at different manufacturing stages. This approach is based on Waltzman’s (Waltzman, 1987) 2D symmetry detection algorithm. 3D symmetry is recognized by considering its 2D symmetry and the associated bending transformations. We show, by recognizing that the part is symmetrical, that the planning complexity for processes in sheet-metal production can be greatly reduced. This paper is motivated by the fact that a significant percentage of sheet-metal parts are symmetrical. We have studied over 200 industrial parts and over 40% of them are symmetrical. Examples from sheet-metal nesting (layout planning), bending, stacking, product decomposition and assembly planning are discussed.

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Application of 3D Printing for Specific Tools

Materials Science Forum ◽

10.4028/www.scientific.net/msf.862.316 ◽

2016 ◽

Vol 862 ◽

pp. 316-323 ◽

Cited By ~ 1

Author(s):

Petr Zelený ◽

Tomáš Váňa ◽

Jaroslav Stryal

Keyword(s):

3D Printing ◽

Production Process ◽

Sheet Metal ◽

Sheet Metal Forming ◽

Metal Forming ◽

Appropriate Technology

This article describes possibilities of utilizing 3D printing technologies for production of specific tools for sheet metal forming which would help to simplify and accelerate manufacturing of prototypes for the electronic industry.The article contains a number of technologies and their combinations. In conclusion, the most appropriate technology is determined along with implementation of the procedure into a production process.

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Sheet metal production accessory booklet

Aircraft Engineering and Aerospace Technology ◽

10.1108/aeat.2001.12773eab.041 ◽

2001 ◽

Vol 73 (5) ◽

Keyword(s):

Sheet Metal ◽

Metal Production

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Burr Formation in Metal Cutting Operations and some Deburring Methods

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.581.235 ◽

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.

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CIM in sheet metal production

Proceedings of the 5th International Conference on Flexible Manufacturing Systems ◽

10.1007/978-3-662-38009-3_28 ◽

1986 ◽

pp. 285-301

Author(s):

M. Bitz

Keyword(s):

Sheet Metal ◽

Metal Production

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Towards Automatic Part Identification in Sheet Metal Workshops

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.883.167 ◽

2021 ◽

Vol 883 ◽

pp. 167-174

Author(s):

Alberto Tomas Garcia ◽

Nikita Levichev ◽

Vitalii Vorkov ◽

Dirk Cattrysse ◽

Joost R. Duflou

Keyword(s):

Sheet Metal ◽

Radio Frequency Identification ◽

Automatic Identification ◽

Metal Production ◽

Proactive Approach ◽

Information Gap ◽

Frequency Identification ◽

Alternative Solutions ◽

Actual Decision ◽

Made In

Pallets and forklifts equipped with Radio-Frequency Identification (RFID) technology can be a suitable option for bridging the information gap between cutting and bending stages in sheet metal production. However, a decision on how tagged pallets can be assigned to their content needs to be made. In this paper, a reactive and a proactive approach for the near-automatic identification of parts on pallets after cutting are discussed and their performance is evaluated through a series of simulations. In both approaches, the nesting information along with the measured net weight of the pallets are used to determine the parts on top of each pallet. The influence of the alternative solutions problem on the performance is investigated for both approaches. It is concluded that the actual decision on the approach selection depends on the time that is required for each recalculation and each pre-allocation. Those times are workshop dependent and, therefore, a decision should be made for each workshop specifically.

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Manufacturing Processes for Combined Forming of Multi-Material Structures Consisting of Sheet Metal and Local CFRP Reinforcements

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.504-506.295 ◽

2012 ◽

Vol 504-506 ◽

pp. 295-300 ◽

Cited By ~ 10

Author(s):

Hans Christian Schmidt ◽

Ulf Damerow ◽

Christian Lauter ◽

Bernhard Gorny ◽

Frederik Hankeln ◽

...

Keyword(s):

Carbon Fibre ◽

Production Process ◽

Sheet Metal ◽

Process Design ◽

Research Work ◽

Steel Structures ◽

Experimental Investigations ◽

Manufacturing Processes ◽

Efficient Production ◽

Material Behaviour

A new and promising approach to the reduction of greenhouse gas emissions is the use of improved lightweight constructions based on multi-material systems comprising sheet metal with local carbon fibre reinforced plastic (CFRP) reinforcements. The CFRP is used to reinforce highly stressed areas and can be aligned to specific load cases. The locally restricted application of CFRP means that the material costs can be effectively reduced by comparison to parts made entirely of CFRP on account of the expensive production process requiring the use of an autoclave. These parts are thus only used in high-priced products. The production of hybrid CFRP steel structures in a mass production process calls for an efficient production technology. Current research work within the scope of a collaborative research project running at the University of Paderborn is concentrating on the development of manufacturing processes for the efficient production of automotive structural components made up of sheet metal blanks with local CFRP patches. The project is focusing especially on basic research into the production of industrial components. The aim of the investigation is to create an efficient and controlled process for producing CFRP reinforced steel structures from semi-finished hybrid steel-CFRP material. This includes tool concepts and an appropriate process design to permit short process times. The basis of an efficient process design is an in-depth knowledge of the material behaviour, and hence a thorough characterisation was performed. Material parameters were determined for both simulation and forming. For this, monotonic tensile, shear and bending tests were conducted using both uncured prepregs and cured CFRP specimens. To achieve an accurate simulation of the forming process, a special material model for carbon fibre prepregs has been developed which also includes the anisotropic material behaviour resulting from fibre orientation, the viscoelastic behaviour caused by the matrix and the hardening effects that prevail during curing. Recent results show good qualitative agreement and will be presented in this paper. In order to control the properties of the hybrid components, four different tool concepts for the prepreg press technology have been developed and tested. The concepts are presented and the results of experimental investigations are discussed in this paper.

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