Application of Laser Cladding in Forming Processes—Functionally Graded Coatings

Weiß, Wolfgang; Vollmer, Robert; Kolleck, Ralf

doi:10.1063/1.3552336

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…Laser cladding presents attractive opportunities for creating functionally graded coatings to improve performance of hot sheet metal forming tools. Experiments on the use of a functionally graded coating to improve thermal properties of hot stamping tools were conducted by [24]. The coatings consisted of aluminium bronze and a cobalt based alloy.…”

Section: Fig 3 Laser Cladding [20]mentioning

confidence: 99%

Application of surface modification technologies to improve performance of hot sheet metal forming tools: A review

Muvunzi¹,

Dimitrov²,

Matope³

et al. 2018

Proceedings of the EAI International Conference for Research, Innovation and Development for Africa

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Hot sheet metal forming tools are exposed to severe operating conditions which cause adhesion, abrasive wear and fatigue. This causes a reduction in tool life and increased tool maintenance costs. On the other hand, the need for eco-friendly tools has arisen. Surface modification technologies have created opportunities in the tooling industry because of their capability to reduce the thermal and mechanical wear of hot sheet metal forming tools hence extending tool life. However, the technologies have some challenges which limit their wide application and there is need for further development. The purpose of this paper is to give a review on the application of surface modification technologies in hot sheet metal forming tools. The paper also discusses future research areas in the modification of tool surfaces to reduce wear and friction in hot sheet metal forming tools.

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Section: Fig 3 Laser Cladding [20]mentioning

confidence: 99%

Application of surface modification technologies to improve performance of hot sheet metal forming tools: A review

Muvunzi¹,

Dimitrov²,

Matope³

et al. 2018

Proceedings of the EAI International Conference for Research, Innovation and Development for Africa

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“…There is a technical limitation to optimize geometrical and physical properties, whereas further potential of improvement of the interfacial properties is available. Weiss et al shows [6] that the heat transfer coefficient (HTC) between blank and die has a share of about 40% regarding the total thermal resistance a significant adjusting screw to shorten the quenching time. The dependency of the HTC was investigated through different testing procedures and institutions [7].…”

Section: Introductionmentioning

confidence: 99%

Improving the Quality of Hot Stamping Parts with Innovative Press Technology and Inline Process Control

Vollmer¹,

Palm²

2017

J. Phys.: Conf. Ser.

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Abstract. The increasing number of hot stamped parts in the automotive industry is challenging different process areas. This paper presents a method how to improve the production rates over the whole life cycle of a hot forming part. In the core element of a hot forming line, the hydraulic press, mainly two processing steps are performed. Forming and quenching of the sheet metal part. In addition to the forming operation, it is inevitable to optimize the quenching condition in the bottom dead centre in order to reach a fully martensitic structure and tight geometrical tolerances of the part. Deviations in the blank thickness, tool wear, polishing of classical tools impair the quenching condition and therefore the part quality over the time. A new press and tool design has been developed to counter this effect by providing homogenous contact pressure over the whole die. Especially with a multi cavity tool, the new method is advantageous. Test series have shown that the new tool and press concept can produce parts with a blank thickness of 1.0 mm within 8.0 s cycle time. The so called PCH flex principle makes it possible to produce such high output rates under reliable conditions.

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