Decreasing of the manufacturing time for a thermoforming mold by applying the DFM principles

Păcurar, Ancuţa; Păcurar, Răzvan; Erőss, Beáta; Popişter, Florin; Oțel, Călin Ciprian

doi:10.1051/matecconf/201713701008

Cited by 4 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The manufacturing method for the spring was chosen based on several criteria, including manufacturing cost, machine availability, and cutting quality. The machining process for the torsion spring was carried out using a water jet cutting machine, which offers efficient, safe, and highly accurate cutting [34]. The limitations of the water jet machine were considered in the design process, such as the minimum permissible thickness of the flexible spring segment (set at 2 mm) and the width of the material plate (set at 8 mm).…”

Section: Design For Manufacturing (Dfm) Approachmentioning

confidence: 99%

Design and Characterization of a Low-Cost and Efficient Torsional Spring for Lumbar Support Exoskeletons

Al-Dahiree¹,

Ghazilla²,

Tokhi³

et al. 2023

Preprint

View full text Add to dashboard Cite

The design of torsional springs for Series Elastic Actuators (SEAs) is challenging, especially when it comes to balancing good stiffness characteristics and efficient torque robustness. This study focuses on the design of a lightweight, low-cost, and compact torsional spring for use in rotary series elastic actuator (ES-RSEA) of lumbar support exoskeleton. The exoskeleton is used as an assistive device to prevent lower back injuries. The torsion spring was designed following design for manufacturability (DFM) principles, focusing on minimal space and weight. The design process consisted of determining the potential topology and optimizing the selected topology parameters through finite element method (FEM) to reduce equivalent stress. The prototype was made using a waterjet cutting process with low-cost material (AISI-4140-alloy) and tested using a custom-made test rig. The results showed that the torsion spring had a linear torque-displacement relationship with 99% linearity, and the deviation between FEM simulation and experimental measurements was less than 2%. The torsion spring has a maximum torque capacity of 45.7 Nm and a stiffness of 440 Nm/rad. The proposed torsion spring is a promising option for lumbar support exoskeletons and similar applications requiring high stiffness, low weight-to-torque ratio, and cost-effectiveness.

show abstract

Section: Design For Manufacturing (Dfm) Approachmentioning

confidence: 99%

Design and Characterization of a Low-Cost and Efficient Torsional Spring for Lumbar Support Exoskeletons

Al-Dahiree¹,

Ghazilla²,

Tokhi³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…The manufacturing method for the spring was chosen based on several criteria, including manufacturing cost, machine availability, and cutting quality. The machining process for the torsion spring was carried out using a water jet cutting machine, which offers efficient, safe, and highly accurate cutting [ 33 ]. The limitations of the water jet machine were considered in the design process, such as the minimum permissible thickness of the flexible spring segment (set at 2 mm) and the width of the material plate (set at 8 mm).…”

Section: Design Considerationsmentioning

confidence: 99%

Design and Characterization of a Low-Cost and Efficient Torsional Spring for ES-RSEA

Al-Dahiree

Ghazilla

Tokhi

et al. 2023

Sensors

View full text Add to dashboard Cite

The design of torsional springs for series elastic actuators (SEAs) is challenging, especially when balancing good stiffness characteristics and efficient torque robustness. This study focuses on the design of a lightweight, low-cost, and compact torsional spring for use in the energy storage-rotary series elastic actuator (ES-RSEA) of a lumbar support exoskeleton. The exoskeleton is used as an assistive device to prevent lower back injuries. The torsion spring was designed following design for manufacturability (DFM) principles, focusing on minimal space and weight. The design process involved determining the potential topology and optimizing the selected topology parameters through the finite element method (FEM) to reduce equivalent stress. The prototype was made using a waterjet cutting process with a low-cost material (AISI-4140-alloy) and tested using a custom-made test rig. The results showed that the torsion spring had a linear torque-displacement relationship with 99% linearity, and the deviation between FEM simulation and experimental measurements was less than 2%. The torsion spring has a maximum torque capacity of 45.7 Nm and a 440 Nm/rad stiffness. The proposed torsion spring is a promising option for lumbar support exoskeletons and similar applications requiring low stiffness, low weight-to-torque ratio, and cost-effectiveness.

show abstract

Design and Development of a Robotic Hexapod Platform for Educational Purposes

Steopan

Mocan

Popişter

et al. 2020

New Advances in Mechanisms, Mechanical Transmissions and Robotics

View full text Add to dashboard Cite

Decreasing of the manufacturing time for a thermoforming mold by applying the DFM principles

Cited by 4 publications

References 4 publications

Design and Characterization of a Low-Cost and Efficient Torsional Spring for Lumbar Support Exoskeletons

Design and Characterization of a Low-Cost and Efficient Torsional Spring for Lumbar Support Exoskeletons

Design and Characterization of a Low-Cost and Efficient Torsional Spring for ES-RSEA

Design and Development of a Robotic Hexapod Platform for Educational Purposes

Contact Info

Product

Resources

About