Frank Döpper
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View article: Investigation of the Influence of Sensorized Tool Holders on Dynamic Properties and Manufacturing Results During Milling
Investigation of the Influence of Sensorized Tool Holders on Dynamic Properties and Manufacturing Results During Milling Open
Monitoring process stability and tool condition is essential for ensuring machining quality and efficiency. This study investigates the influence of sensorized tool holders on dynamic properties and machining results. Three clamping condit…
View article: Alleviate Data Scarcity in Remanufacturing: Classifying the Reusability of Parts with Data-Efficient Generative Adversarial Networks (DE-GANs)
Alleviate Data Scarcity in Remanufacturing: Classifying the Reusability of Parts with Data-Efficient Generative Adversarial Networks (DE-GANs) Open
Remanufacturing, a key element of the circular economy, enables products and parts to have new life cycles through a systematic process. Initially, used products (cores) are visually inspected and categorized according to their manufacture…
View article: Forecasting Return Quantity, Timing and Condition in Remanufacturing with Machine Learning: A Mixed-Methods Approach
Forecasting Return Quantity, Timing and Condition in Remanufacturing with Machine Learning: A Mixed-Methods Approach Open
Remanufacturing plays a key role in the circular economy by reducing material consumption and extending product life cycles. However, a major challenge in remanufacturing is accurately forecasting the availability of cores, particularly re…
View article: Design for automated disassembly: a comparative study of different battery component designs
Design for automated disassembly: a comparative study of different battery component designs Open
The feasibility of automated disassembly at a product’s end-of-life stage strongly depends on its design. This relationship is particularly relevant for electric vehicle batteries, for which other design requirements are typically given pr…
View article: Disassembly and Its Obstacles: Challenges Facing Remanufacturers of Lithium-Ion Traction Batteries
Disassembly and Its Obstacles: Challenges Facing Remanufacturers of Lithium-Ion Traction Batteries Open
Lithium-ion batteries are major drivers to decarbonize road traffic and electric power systems. With the rising number of electric vehicles comes an increasing number of lithium-ion batteries reaching their end of use. After their usage, s…
View article: Multi-Domain Assessment of Thermomechanical Recycling Based on Bio-Based and Petroleum-Based Additively Manufactured Components
Multi-Domain Assessment of Thermomechanical Recycling Based on Bio-Based and Petroleum-Based Additively Manufactured Components Open
The surge in global population growth and the escalating demand for social and economic prosperity present formidable challenges in the 21st century. However, asserting the sustainability of some ecological impact reduction initiatives, su…
View article: Towards Sustainable Machining: Synthetic Data Generation for Efficient Optical Tool Wear Monitoring via Generative Adversarial Networks
Towards Sustainable Machining: Synthetic Data Generation for Efficient Optical Tool Wear Monitoring via Generative Adversarial Networks Open
To increase sustainability in the field of machining with regard to energy efficiency improvement and resource conservation, accurate tool wear classification is of a paramount importance. In particular, optical wear monitoring approaches …
View article: Life Cycle Assessment (LCA) of a Circular Saw Blade for Wood Processing
Life Cycle Assessment (LCA) of a Circular Saw Blade for Wood Processing Open
Climate change and its negative consequences are an inevitable topic that strongly affects all industrial sectors as well as private individuals. Therefore, it is necessary to assess and monitor the environmental impact of products, servic…
View article: Method to Simulate the Dynamic Behavior of Micro Ball End Mills
Method to Simulate the Dynamic Behavior of Micro Ball End Mills Open
Instable process behaviour is one of the biggest challenges in micromilling and has a significant impact on tool wear. This leads to reduced workpiece quality and higher scrap. Therefore, it increases the resource and energy consumption. T…
View article: Trends and Resource-Efficient Application of Solid End Mills in Plastics Machining: A Comparative Market Study
Trends and Resource-Efficient Application of Solid End Mills in Plastics Machining: A Comparative Market Study Open
Due to their high share of value creation in manufacturing, the influence of machining processes and the therein applied cutting tools on profitability and sustainability is often high. Plastics machining differs significantly from metal m…
View article: High Speed Sintering of Polyamide 12: From Powder to Part Properties
High Speed Sintering of Polyamide 12: From Powder to Part Properties Open
High Speed Sintering (HSS) is an additive manufacturing process with great potential to produce complex, high-quality polymer parts on an industrial scale. However, little information is currently available on the characteristics of the po…
View article: Anti-microbial plastic parts fabricated by high-speed sintering
Anti-microbial plastic parts fabricated by high-speed sintering Open
This study utilizes Mg(OH)2 nanocrystals (a non-leaching biocide) to develop plastic articles with anti-microbial activity. The standard method for manufacturing plastic nanocomposites involves melt compounding Mg(OH)2 nanocrystals i…
View article: Tool Concept for a Solid Carbide End Mill for Roughing and Finishing of the Tool Steel Toolox 44
Tool Concept for a Solid Carbide End Mill for Roughing and Finishing of the Tool Steel Toolox 44 Open
In tool and mold making, components are typically first pre-machined in a soft state with residual stock allowance, as economical production is not possible in a hardened state due to the enormous tool wear. This extends the process chain …
View article: A structured approach for the compliance analysis of battery systems with regard to the new EU Battery Regulation
A structured approach for the compliance analysis of battery systems with regard to the new EU Battery Regulation Open
The introduction of the European Green Deal has triggered various legislative projects that will require product manufacturers inside and outside the European Union (EU) to ensure compliance with the new regulatory framework. As this is a …
View article: Electrical Smoothing of the Powder Bed Surface in Laser-Based Powder Bed Fusion of Metals
Electrical Smoothing of the Powder Bed Surface in Laser-Based Powder Bed Fusion of Metals Open
Achieving a homogeneous and uniform powder bed surface as well as a defined, uniform layer thickness is crucial for achieving reproducible component properties that meet requirements when powder bed fusion of metals with a laser beam. The …
View article: Evaluation of Powder- and Extrusion-Based Metal Additive Manufacturing Processes for the Sustainable Fabrication of Spare Parts in Electromobility
Evaluation of Powder- and Extrusion-Based Metal Additive Manufacturing Processes for the Sustainable Fabrication of Spare Parts in Electromobility Open
Electromobility promises to efficiently mitigate consequences of increasing traffic volume and its accompanied greenhouse gas emissions. On an individual level, electrified bikes allow emission free electrified mobility at moderate costs, …
View article: Evaluation of Powder- and Extrusion- based Metal Additive Manufacturing Processes for the Fabrication of Spare Parts in Electromobility
Evaluation of Powder- and Extrusion- based Metal Additive Manufacturing Processes for the Fabrication of Spare Parts in Electromobility Open
Electromobility promises to efficiently mitigate consequences of increasing traffic volume and its accompanied greenhouse gas emissions. On an individual level, electrified bikes allow emission free electrified mobility at moderate costs a…
View article: Thermo-Mechanical Recyclability of Additively Manufactured Polypropylene and Polylactic Acid Parts and Polypropylene Support Structures
Thermo-Mechanical Recyclability of Additively Manufactured Polypropylene and Polylactic Acid Parts and Polypropylene Support Structures Open
Polymers have a reputation for several advantageous characteristics like chemical resistance, weight reduction, and simple form-giving processes. The rise of additive manufacturing technologies such as Fused Filament Fabrication (FFF) has …
View article: Assessment of the disassemblability of electric bicycle motors for remanufacturing
Assessment of the disassemblability of electric bicycle motors for remanufacturing Open
In 2021, sales of electric bicycles in Germany increased compared to the previous year, leading to a 43% share of electric bicycles in the total German bicycle market. The German Bicycle Industry Association (ZIV) expects this growth to co…
View article: Combining finite elements (FE) simulation and design of experiments (DoE) for an efficient saw tooth design process
Combining finite elements (FE) simulation and design of experiments (DoE) for an efficient saw tooth design process Open
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View article: Development of a micro reference part for the evaluation of the stability in micro milling operations
Development of a micro reference part for the evaluation of the stability in micro milling operations Open
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View article: A system for automated tool wear monitoring and classification using computer vision
A system for automated tool wear monitoring and classification using computer vision Open
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View article: Evaluation of Material Properties of Spruce Wood Samples to Improve the Development Process for More Sustainable Sawing Processes
Evaluation of Material Properties of Spruce Wood Samples to Improve the Development Process for More Sustainable Sawing Processes Open
The processing of wood as a renewable and sustainable material is steadily gaining in importance. However, sawing processes in sawmills are characterized by high electrical energy consumption. Improving the geometry of the saw teeth is an …
View article: Simulation-Based Analysis of (Reverse) Supply Chains in Circular Product-Service-Systems
Simulation-Based Analysis of (Reverse) Supply Chains in Circular Product-Service-Systems Open
With an expected growth of global waste to 3.40 billion tonnes by 2050 and a circularity today of only 8.6% of the world, the earth’s sustainable resources are being exploited beyond their regeneration capacity. Hence, it is necessary to s…
View article: Thermal Modeling Challenges of High-Speed Motorized Spindles
Thermal Modeling Challenges of High-Speed Motorized Spindles Open
This paper investigates the thermal modeling challenges of high-speed motorized spindles up to 40,000 rpm. The thermal expansion and deflection of motorized spindles are critical determinants for the resulting tool center point displacemen…
View article: Resilience Balanced Scorecard: Measuring Resilience of Manufacturing Companies at Multiple Levels
Resilience Balanced Scorecard: Measuring Resilience of Manufacturing Companies at Multiple Levels Open
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View article: Environmental Assessment of Recycled Petroleum and Bio Based Additively Manufactured Parts via LCA
Environmental Assessment of Recycled Petroleum and Bio Based Additively Manufactured Parts via LCA Open
Additive Manufacturing (AM) as much as sustainability aspects gained increasing attention in the last couple of years. The vision of resource-efficient manufacturing at batch size one is often claimed as an outstanding property of AM. Fuse…
View article: Automatic time series segmentation and clustering for process monitoring in series production
Automatic time series segmentation and clustering for process monitoring in series production Open
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View article: Design of a reference part for the comparison of tools in plastic milling operations
Design of a reference part for the comparison of tools in plastic milling operations Open
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View article: Systematic evaluation of the part properties through combination of different greyscales in one part in High Speed Sintering
Systematic evaluation of the part properties through combination of different greyscales in one part in High Speed Sintering Open
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