Torbjørn Leirmo

SINTEF | Stiftelsen for industriell og teknisk forskning · SINTEF Manufacturing

The holy grail of Industry 5.0 resides in the intersection of the three dimensions; sustainable, resilient, and human-centric manufacturing. While the Industry 4.0 paradigm addresses resiliency and sustainability through increased flexibility and efficiency, the human component of manufacturing systems has been largely neglected. Despite rapid deve...

Flexible manufacturing systems in high-mix low-volume segments offer many challenges in terms of planning and scheduling. The complexity of these systems often requires a systemic approach for which humans are the perfect actors. However, computer systems can support scheduling tasks more effectively due to their capacity to synthesize large amount...

Zero defect manufacturing (ZDM) aims at eliminating defects throughout the value stream as well as the cost of rework and scrap. The ambitious goal of zero defects requires the extensive utilization of emerging technologies. Amidst the major drive for technological advancement, humans are often kept out of the loop because they are perceived as the...

Under the circular economy paradigm, de- and remanufacturing systems are more relevant than ever. However, such systems present specific challenges related to the system structure, automation, and recovery of complex products. At present, operations such as disassembly and quality assessment of returned products largely depend on manual labor and t...

For additive manufacturing (AM) to be successfully implemented in manufacturing systems, the geometric accuracy of components must be controlled in terms of form, fit, and function. Because the accuracy of AM products is greatly affected by the part build orientation, this factor dictates the achievable tolerances and thereby the ability to incorpo...

As Additive Manufacturing (AM) enters the manufacturing industry, the technology must adhere to stringent quality demands in terms of dimensional and geometric accuracy. However, due to substantial differences in how these technologies realize three-dimensional geometries, generalization of phenomena across AM technologies proves to be quite diffic...

Variation management in additive manufacturing (AM) is progressively more important as technologies are implemented in industrial manufacturing systems; hence massive research efforts are focused on the modeling and optimization of process parameters and the effect on final part quality. These efforts are, however, hampered by the very problem they...

Mesh data is extensively used in CAD/CAM applications to approximate three-dimensional (3D) solid models. The STL file format is one of the key file formats for 3D data transfer in modern manufacturing systems. STL files, however, retain no topological information, which would have been beneficial for subsequent file analysis and manipulation. The...

Part representation in additive manufacturing (AM) is dominated by the stereolithography (STL) file format as a universal mode for communicating and transferring part geometry from one system to another. However, when the CAD model is converted to the triangle mesh constituting the STL file the topology is no longer explicitly defined hence the des...

Additive Manufacturing (AM) is becoming an integral part of modern manufacturing systems and therefore, the AM technologies needs to adhere to strict quality demands. Due to the layered nature of AM, the part build orientation has a major influence on final part properties. Previous efforts to optimize the part orientation largely utilizes evolutio...

Additive Manufacturing (AM) as a manufacturing process is increasingly implemented in manufacturing and is thus subjected to the high demands of industry. With the industrialization of AM technologies follows demands regarding not only dimensions and tolerances, but also mechanical properties, processing time and cost. The multi-objective optimizat...