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kuka quantec

Kuka robot constructs pavilion by sewing parts together

June 14, 2016 by Sam Francis

kuka quantec
Like an oversized sand dollar: the completed research pavilion at the University of Stuttgart. Photo: ICD/ITKE University of Stuttgart

Sewing may be one of the oldest technical activities of humankind but it’s not one that robots have yet fully mastered. 

The complexity of sewing, whether it’s sewing by hand or using a machine, is such that robots – or sophisticated sewing machines – can only perform some relatively simple stitches.

But those stitches that the robots or sewing machines can perform are actually very impressive and would be difficult – though not impossible for a human.

On the other hand, a lot of things a human can do – such as stitch together a sleeve and cuff or some other part of the garment, or even sew together the entire garment – is way beyond the realms of possibility for even the most sophisticated robots of today.

Nonetheless, the university in Stuttgart has used Kuka robots to perform a sewing job which can only be described as impressive. Perhaps weird as well, since they stitched together some wood – not a material usually associated with sewing. 

KUKA_QUANTEC_Research_Pavilion_1
A work step in the robotic sewing process: the elastically bent plywood strips are fixed in this position by the robot and guided through a synchronized industrial sewing machine. Photo: ICD/ITKE University of Stuttgart

In a statement, Kuka, the students and their tutors say their work “combines bionic investigations with innovative robotic manufacturing methods”.

The robot assists by fixing the bent strips of plywood in the desired geometrical configuration and then guiding them through the sewing machine.

By performing this work step, the Kuka robot of the KR Quantec series helped to build the new research pavilion at the University of Stuttgart. For the first time, the Institute for Computational Design (ICD) and the Institute of Building Structures and Structural Design (ITKE) used industrial sewing technologies for wooden construction.

The design of the extremely lightweight wooden shell was based on the structural morphology of the sand dollar. Sand dollars are a subspecies of sea urchin. This model was chosen because it is particularly suitable for the technical transfer of construction and educational principles.

Innovative wood joints with robotic sewing technology 

husqvarna sewing machine 1
Some sophisticated and expensive sewing machines are capable of stitching some pretty patterns and overlocking buttonholes, but that’s about it

The starting material was thin strips of veneer. These were laminated to form flat, individually manufactured plywood boards. This enabled elastic deformation of the construction elements. Following this process step, the Kuka robot got in on the act. It assisted by fixing the bent plywood strips in the specified geometrical configuration.

During the subsequent sewing process, the robot guided the bent strips through the sewing machine and joined them together. The robot controller and sewing machine controller were linked together by means of specially programmed software. This interface enabled the robot to recognize both the current position of the workpiece and the status of the sewing machine at all times and also to synchronize the motion.

A work step in the robotic sewing process: the elastically bent plywood strips are fixed in this position by the robot and guided through a synchronized industrial sewing machine. Photo: ICD/ITKE University of Stuttgart

Kuka robots could lead the way to larger wooden constructions 

For the pavilion, the industrial robot prefabricated a total of 151 different segments. They have bending radii of between 30 and 75 cm. This lightweight construction weighs 780 kg, spans a distance of 9.3 m and covers a total area of 85 m².

All in all, this new research pavilion demonstrates how the interactions between material, form, space, supporting structure and robotic manufacture can give rise to innovative wooden constructions.

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Filed Under: Industry, Manufacturing, News Tagged With: construction, design, industrial, innovative, kuka, machine, pavilion, plywood, robot, robotic, sewing, stuttgart, university

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