scholarly journals LIPSS for metal forming tools

2021 ◽  
Vol 18 (5) ◽  
pp. 14-15
Author(s):  
Lewin Rathmann ◽  
Tim Radel
Keyword(s):  
Metal Forming ◽  
Forming Tools

scholarly journals Investigation of microstructure and hardness of a rib geometry produced by metal forming and wire-arc additive manufacturing

2018 ◽  
Vol 190 ◽  
pp. 02005 ◽  
Author(s):  
Markus Hirtler ◽  
Angelika Jedynak ◽  
Benjamin Sydow ◽  
Alexander Sviridov ◽  
Markus Bambach
Keyword(s):  
Additive Manufacturing ◽  
Metal Forming ◽  
Batch Size ◽  
Unit Costs ◽  
Batch Sizes ◽  
Traditional Manufacturing ◽  
Manufacturing Technologies ◽  
Forming Tools ◽  
Wire Arc Additive Manufacturing ◽  
Am Processes

Within the scope of consumer-oriented production, individuality and cost-effectiveness are two essential aspects, which can barely be met by traditional manufacturing technologies. Conventional metal forming techniques are suitable for large batch sizes. If variants or individualized components have to be formed, the unit costs rise due to the inevitable tooling costs. For such applications, additive manufacturing (AM) processes, which do not require tooling, are more suitable. Due to the low production rates and limited build space of AM machines, the manufacturing costs are highly dependent on part size and batch size. Hence, a combination of both manufacturing technologies i.e. conventional metal forming and additive manufacturing seems expedient for a number of applications. The current study develops a process chain combining forming and additive manufacturing. First, a semi-finished product is formed with forming tools of reduced complexity and then finished by additive manufacturing. This research investigates the addition of features using AlSi12 created by Wire Arc Additive Manufacturing (WAAM) on formed EN-AW 6082 preforms. By forming, the strength of the material was increased, while this effect was partly reduced by the heat input of the WAAM process.

Tribological Behaviour of PVD Coatings for Sheet Metal Forming Tools: Laboratory and Industrial Evaluation

2012 ◽  
Vol 504-506 ◽  
pp. 543-548 ◽  
Author(s):  
Francesco Sgarabotto ◽  
Andrea Ghiotti
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Vapour Deposition ◽  
New Technology ◽  
Research Work ◽  
Chemical Vapour ◽  
Tribological Behaviour ◽  
Wide Range ◽  
Forming Tools

In the last decades, Physical Vapour Deposition (PVD) and Chemical Vapour Deposition (CVD) processes have been significantly improved and optimized for the applications on dies for sheet metal forming processes. However, due to the different contact conditions at dies-blank interfaces, and the wide range of applied contact pressures, the selection of the correct coating may be still affected by trials-and-error approaches. Although many methods to evaluate the tribological performances of such coatings can be found in scientific literature, they often suffer of limitations in reproducing the interface conditions typical of industrial processes. The objective of the present research work is to investigate the tribological behaviour of two coatings deposited by PVD magnetron sputtering technique. Both investigations in laboratory and industrial conditions were performed: the former to evaluate their tribological characteristics, the latter to test the performances of coatings in production lines. The results, in terms of wear resistance, outline the comparison of the new technology with the performances of traditional dies.

SURFACE DAMAGE BEHAVIOR OF GALVANIZED STEEL SHEETS IN FORMING PROCESS UNDER TENSION-BENDING

2010 ◽  
Vol 24 (30) ◽  
pp. 5877-5884 ◽  
Author(s):  
Z. Q. YU ◽  
Y. K. HOU ◽  
S. H. LI ◽  
Z. Q. LIN ◽  
W. G. ZHANG
Keyword(s):  
Sheet Metal Forming ◽  
Metal Forming ◽  
Surface Damage ◽  
Galvanized Steel ◽  
Forming Process ◽  
Damage Resistance ◽  
Steel Sheets ◽  
Galvanized Steels ◽  
Part Surface ◽  
Forming Tools

The surface damage behaviors of different galvanized steel sheets were investigated under the condition of tension-bending. The U-channel forming tests were performed for HDGI (hot-dip galvanized) and HDGA (hot-dip galvannealed) steels. Experimental results indicate that HDGI steel shows better damage resistance than HDGA steel in sheet metal forming. Scratching is the main surface damage in the forming of HDGI steel while exfoliating and scratching of coating are two types of surface damage for HDGA steel. And tool hardness and surface topography have crucial effects on part surface damage in the forming of the two kinds of galvanized steels. Different surface treatments should be applied to the forming tools in the forming of HDGI and HDGA steels for better surface qualities of products.

Machines and Tools for Sheet-Bulk Metal Forming

2011 ◽  
Vol 473 ◽  
pp. 91-98 ◽  
Author(s):  
Marion Merklein ◽  
A. Erman Tekkaya ◽  
Alexander Brosius ◽  
Simon Opel ◽  
Lukas Kwiatkowski ◽  
...  
Keyword(s):  
Metal Forming ◽  
Incremental Forming ◽  
Batch Size ◽  
Bulk Metal ◽  
Bulk Metal Forming ◽  
New Process ◽  
Novel Approaches ◽  
The Individual ◽  
Forming Tools ◽  
Functional Components

The demand on closely-tolerated and complex functional components in the automotive sector, like e.g. synchronizer rings, leads to the development of a new process-class named “sheet-bulk metal forming”. Within this technology bulk metal forming operations are applied on sheet metals. In the following two novel approaches considering machines and tools for sheet-bulk metal forming are presented. The first approach aims on a technology based on rolling, which is suitable for mass production. The second one is an incremental forming solution for low batch production. Both machine concepts allow the application of different forming strategies to manufacture individual tailored semi-finished products in term of a pre-distribution of material. These products feature variable sheet thicknesses and mechanical properties, which can be adapted to their case of applica-tion. Depending on the individual batch size, the blanks can be finished to functional parts by sub-sequent forming processes like deep drawing and upsetting, extrusion or incremental forming. In this paper the case of an incremental tooth-forming is mainly considered. Forming sequences and resulting loads are modeled and calculated by finite elements simulations for all discussed processes to serve as a basis for the design and dimensioning of the machine components and forming tools.

Experimental and numerical analysis of tribological effective surfaces for forming tools in Sheet-Bulk Metal Forming

2016 ◽  
Vol 10 (1) ◽  
pp. 37-50 ◽  
Author(s):  
Petra Kersting ◽  
Daniel Gröbel ◽  
Marion Merklein ◽  
Peter Sieczkarek ◽  
Sebastian Wernicke ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Metal Forming ◽  
Bulk Metal ◽  
Bulk Metal Forming ◽  
Forming Tools
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