Peter Groche
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View article: Investigating the Three‐Dimensional Forming of Microfibrillated Cellulose‐Coated Paperboard With Full and Localised Coatings in Thermoforming, Hydroforming and Deep Drawing
Investigating the Three‐Dimensional Forming of Microfibrillated Cellulose‐Coated Paperboard With Full and Localised Coatings in Thermoforming, Hydroforming and Deep Drawing Open
The shift towards sustainable packaging has increased interest in fibre‐based materials, such as paperboard, as alternatives to plastics. However, the limited formability of paperboard presents challenges in producing intricate three‐dimen…
View article: Requirements for numeric models as sources of synthetic data for predicting real-world data sets
Requirements for numeric models as sources of synthetic data for predicting real-world data sets Open
In the field of forming technology, synthetic data generated by finite element (FE) simulations is increasingly being used to train machine learning (ML) models for quality prediction. However, the predictive accuracy on real-world process…
View article: Camera-based feature extraction and uncertainty analysis in deep drawing in progressive dies
Camera-based feature extraction and uncertainty analysis in deep drawing in progressive dies Open
In progressive die deep drawing, small deviations in strip positioning and transport can accumulate across stages, leading to significant geometric variations and quality issues. Reliable datasets are therefore essential for data-driven mo…
View article: Development of Robust Machine Learning Models for Tool-Wear Monitoring in Blanking Processes Under Data Scarcity
Development of Robust Machine Learning Models for Tool-Wear Monitoring in Blanking Processes Under Data Scarcity Open
Tool wear is a major challenge in sheet-metal forming, as it directly affects product quality and process stability. Reliable monitoring of tool-wear conditions is therefore essential, yet it remains challenging due to limited data availab…
View article: Simulation Driven Modeling of Strip Misalignment: Enhancing Process Insight and Failure Prediction in Sheet Metal Forming
Simulation Driven Modeling of Strip Misalignment: Enhancing Process Insight and Failure Prediction in Sheet Metal Forming Open
In industrial sheet metal forming processes, the acquisition of accurate data is often challenging due to limited accessibility to critical zones. An example is the correlation of strip position with the resulting force process signal in s…
View article: Compensation Strategy for Shape Defects in Flexible Roller Beading
Compensation Strategy for Shape Defects in Flexible Roller Beading Open
The novel forming process ‘Flexible Roller Beading’ (FRB) represents an extension of roll forming. In addition to the familiar horizontal relative movement between the material and the forming tool during roll forming, FRB also offers the …
View article: Reinforcement Learning based Straightening in Roll Forming
Reinforcement Learning based Straightening in Roll Forming Open
Roll forming is a sheet metal forming process used in a wide range of manufacturing industries that has high material utilisation and high production rates. The raw material is incrementally bent into the desired shape by consecutive formi…
View article: Influence of Surface Damage on Weld Quality and Joint Strength of Collision-Welded Aluminium Joints
Influence of Surface Damage on Weld Quality and Joint Strength of Collision-Welded Aluminium Joints Open
Collision welding represents a promising solid-state joining technique for combining both similar and dissimilar metals without the thermal degradation of mechanical properties typically associated with fusion-based methods. This makes it …
View article: Reliable machine learning models for manufacturing processes
Reliable machine learning models for manufacturing processes Open
Data-driven condition monitoring in manufacturing using machine learning (ML) offers great potential for operating processes reliably and cost-effectively. Particularly in blanking, a manufacturing process characterized by high production …
View article: Controlling Product Properties in Forming Processes Using Reinforcement Learning—An Application to V-Die Bending
Controlling Product Properties in Forming Processes Using Reinforcement Learning—An Application to V-Die Bending Open
Uncertainty is unavoidable in forming processes due to fluctuating properties in the semi-finished product, the tool system and the environment. For this reason, numerous scientists have addressed this issue by developing control approache…
View article: Optimization of a thixoforming process for Nd-Fe-B permanent magnets by the finite-discrete-element-method
Optimization of a thixoforming process for Nd-Fe-B permanent magnets by the finite-discrete-element-method Open
View article: Effect of density on in-plane material behavior: The case of laboratory paper and commercial paperboard
Effect of density on in-plane material behavior: The case of laboratory paper and commercial paperboard Open
Paper and paperboard are highly regarded for their recyclability and sustainability, but their inherent inhomogeneity presents challenges for material characterization and modeling. Despite being pressed during production, they remain comp…
View article: Durchblick in der Produktion
Durchblick in der Produktion Open
Eine eng tolerierte und konstante Produktqualität bei zugleich hohen Produktionsraten machen Umformprozesse zu wirtschaftlichen und nachhaltigen Fertigungsverfahren mit einer hohen Relevanz in der industriellen Produktion. Kurz-, mittel- u…
View article: Thermochromically Enhanced Lubricant System for Temperature Measurement in Cold Forming
Thermochromically Enhanced Lubricant System for Temperature Measurement in Cold Forming Open
Cold forming offers high dimensional accuracy, energy and cost efficiency in the mass production of highly stressed components but is also associated with high tribological loads. Complex lubrication systems are required to ensure smooth p…
View article: Nanostructuring of the titanium alloy Ti-13Nb-13Zr (NanoTNZ) for osteosynthesis implants by continuous multidirectional swaging
Nanostructuring of the titanium alloy Ti-13Nb-13Zr (NanoTNZ) for osteosynthesis implants by continuous multidirectional swaging Open
View article: Improved Tribological Properties of Blanking Punches for Copper Alloys Utilizing Deterministic Surface Texturing by Machine Hammer Peening
Improved Tribological Properties of Blanking Punches for Copper Alloys Utilizing Deterministic Surface Texturing by Machine Hammer Peening Open
Constant efforts to increase resource efficiency, productivity, and output quantities, as well as growing product requirements, result in high tribological loads on forming tools. The manipulation of the tribological properties of blanking…
View article: Identifying productivity-limiting factors in progressive die stamping: data-driven methodology for process optimization
Identifying productivity-limiting factors in progressive die stamping: data-driven methodology for process optimization Open
Manufacturing products in multi-stage forming processes through blanking, deep-drawing and bending operations with progressive dies is one of the most economically relevant processes in the sheet metal forming industry and allows for compl…
View article: Inline Wear Detection in High-Speed Progressive Dies Using Photometric Stereo
Inline Wear Detection in High-Speed Progressive Dies Using Photometric Stereo Open
The progressive forming of complex components, including blanking, deep-drawing, and bending, represents an economically efficient sheet metal processing method. Wear control is crucial for ensuring product quality by preventing defects an…
View article: Multi-stage and Multi-technology Forming of Paper for Sustainable Packaging
Multi-stage and Multi-technology Forming of Paper for Sustainable Packaging Open
Forming of paperboard enables great design freedom, high productivity and sustainable packaging solutions. The limiting factor in forming processes is the low ductility of the natural fiber material. Not only does this often lead to unwant…
View article: Frontloading Approach for Energy Efficiency in Forming Technology
Frontloading Approach for Energy Efficiency in Forming Technology Open
The early stages of forming process development offer a high degree of design freedom and therefore cost advantages in implementing energy efficiency measures. However, this potential often remains unused in industrial applications due to …
View article: Effect of cavity design on textured tool surfaces in sheet metal forming
Effect of cavity design on textured tool surfaces in sheet metal forming Open
In order to advance sustainability in manufacturing, it is necessary to reduce both energy use and material waste. Tribology is recognised as a central factor in this effort. In sheet metal forming, for example, friction and wear lead to i…
View article: Soft sensor-based inline geometry control of hole-rolled polygon hubs
Soft sensor-based inline geometry control of hole-rolled polygon hubs Open
View article: A Novel Approach on Phase Change Actuators Based on the Stomata Principle
A Novel Approach on Phase Change Actuators Based on the Stomata Principle Open
View article: Cavity Design for Surface Textured Sheets in Metal Forming
Cavity Design for Surface Textured Sheets in Metal Forming Open
It is estimated that 23 % of the global energy consumption is attributable to friction between surfaces and subsequent wear. Accordingly, improvements in the tribological characteristics in industrial procedures hold considerable promise. …
View article: Transmitted Light Measurement to Determine the Local Structural Characteristics of Paperboard: Grammage, Thickness, and Fiber Orientation
Transmitted Light Measurement to Determine the Local Structural Characteristics of Paperboard: Grammage, Thickness, and Fiber Orientation Open
This study presents a novel transmission-based method for characterizing local structural features, including the grammage, thickness, and fiber orientation, of paper materials. Some non-destructive techniques, such as micro-computed tomog…
View article: Higher drawing depth and less wrinkling due to drawbeads in paperboard forming
Higher drawing depth and less wrinkling due to drawbeads in paperboard forming Open
Deep drawing of paperboard has shown promising results for the packaging industry due to its high productivity, economical process routes, and geometrical freedom. Paper, as a material, offers a combination of compostability and recyclabil…
View article: A new process route for the manufacturing of hubs in sheet metal structures by utilising flexible hole-rolling
A new process route for the manufacturing of hubs in sheet metal structures by utilising flexible hole-rolling Open
The development of novel forming machines, such as the 3D Servo Press, provides the opportunity to implement entirely novel forming processes and to manufacture established machine elements, such as hubs with polygon contour, through the u…
View article: Study of Parameters Influencing Wrinkles in the Deep Drawing of Fiber-Based Materials Using Automatic Image Detection
Study of Parameters Influencing Wrinkles in the Deep Drawing of Fiber-Based Materials Using Automatic Image Detection Open
The evaluation of wrinkles in deep-drawn fiber-based materials is crucial for the assessment of product quality and the optimization of manufacturing processes. Wrinkling is a common phenomenon in the deep-drawing process and is caused by …
View article: Study of Parameters Influencing Wrinkles in Deep Drawing of Fiber-Based Materials Using Automatic Image Detection
Study of Parameters Influencing Wrinkles in Deep Drawing of Fiber-Based Materials Using Automatic Image Detection Open
The evaluation of wrinkles in deep-drawn fiber-based materials is crucial for the assessment of product quality and the optimization of manufacturing processes. Wrinkles, a common phenomenon in deep-drawing paper materials with high drawin…
View article: Machine learning based operator assistance in roll forming
Machine learning based operator assistance in roll forming Open
This paper presents an approach for operator assistance in roll forming to overcome the challenges of progressive skilled labor shortage faced by manufacturers of profiled products. An introductory study proves the necessity and the willin…