Logo Leibniz Universität Hannover
Logo: Hannover Center of Mechatronics/Leibniz Universität Hannover
Logo Leibniz Universität Hannover
Logo: Hannover Center of Mechatronics/Leibniz Universität Hannover
  • Zielgruppen
  • Suche
 

Completed Projects in Production Engineering

Production Engineering

Active Manipulation of Tool Wear in External Cylindrical Plunge Grinding

Bild zum Projekt Aktive Beeinflussung des Werkzeugverschleißes
beim Außenrundeinstechschleifen

Researcher:

IFW, imes

Duration:

since 2011

Funded by:

DFG

Brief description:

Chatter vibrations are still a problem for the handling of high-precision systems in manufacturing, e.g. they are limiting the performance of these machines. To avoid chattering caused by abrasion of the tool, true running cycles are frequently needed nowadays. The goal of this project is to build up an active damping with an electromagnetic actuator. The actuator leads to additional forces to realise the damping.

 

| details |

 

Ultrasonic-assisted Composite Casting

Bild zum Projekt Ultraschallunterstützter Verbundguss

Researcher:

IDS, IW

Duration:

2011

Funded by:

DFG

Brief description:

For simultaneous composite casting, two or more casts are simultaneously poured into a mould. In order to avoid a mixing up, phase separating plates are used.

 

| details |

 

Development of Biocompatible Magnesium Alloys and Investigations into their Degradation Behaviour

Bild zum Projekt Entwicklung von biokompatiblen Magnesiumlegierungen und Untersuchung von deren Degradationsverhalten

Researcher:

IW

Duration:

until 2014

Funded by:

DFG - SFB 599

Brief description:

This research project deals with the development of an alloy for degradable implants based on magnesium. These implant materials shall be suitable for use in hard tissue (high strength) as well as in soft tissue (high ductility). The degradation process adapted to the component and its implantation area is adapted by different coatings and various material combinations. The alloys are tested in in-vitro and ex-vivo test systems concerning their biocompatibility in different types of tissues and are then transferred into in-vivo systems. Applications are for example paranasal sinus stents.

 

| details |

 

InUse – Intelligent Washer for Force Measurement in Bolt Connections

Bild zum Projekt InUse - Intelligente Unterlegscheibe zur Messung von Kräften in Schraubverbindungen

Researcher:

ITA

Duration:

2010 - 2011

Funded by:

AiF, Eilhauer Maschinenbau GmbH, Microsensys GmbH

Brief description:

Aim of the project InUse is the development of a novel intelligent washer for measuring forces directly in a bolt connection via piezoelectric sensors in conjunction with contactless RFID transfer to a reading device.

 

| details |

 

Method for Motor-integrated Damping of Spindle Oscillations in Machine Tools

Bild zum Projekt Methode zur motorintegrierten Dämpfung von Spindelschwingungen bei Werkzeugmaschinen

Researcher:

IFW, IAL

Duration:

2009 - 2011

Funded by:

DFG

Brief description:

Goal of this DFG-funded joint research project of the IAL and IFW is an active damping of oscillations at main spindle units for milling machines. Basis of the damping method is to integrate magnetic actors into the active part of a synchronous spindle motor.

 

| details |

 

Machining of Stone with Ultrasonically Excited Tools

Bild zum Projekt Gesteinsbearbeitung mit ultraschallangeregtem Werkzeug

Researcher:

IDS

Duration:

2009 - 2011

Funded by:

DFG

Brief description:

Aim of this DFG-funded project is to investigate on how to improve efficiency in automatic machining of stone, e.g. granite.

 

| details |

 

Active Micro-optics

Bild zum Projekt Aktive Mikrooptiken

Researcher:

IMPT

Duration:

sincs 2009

Funded by:

DFG

Brief description:

Within the framework of the project „Electromagnetic Actuation of Micro-optics: Adaptive Systems on the basis of Ferro fluidic Actuators“ of the SPP 1337 „Active Micro-optics“, the Institute of Micro Production Technology (IMPT) deals with the design and production of a micro actuator. By excitation of the micro coil array as part of the micro actuator, an electromagnetic field is induced, displacing a ferrofluid in a micro channel. By moving the electromagnetic liquid body, an optically active liquid is displaced within the fine micro channel structures made of PMMA. To model the micro coil array, FEM analyses were successfully carried out for simulation of the magnetically excited field and the temperature. From the simulation results, the design for the lithographic photo masks was derived. Then a process chain was developed for the micro actuator production, and the corresponding thin-film processes were optimised. In the meantime, the first actuators have already been produced, and the experiences gained have been used for design optimisation. The first optimised micro actuators are now completed and under test. In the subsequent system integration phase, two micro actuators form a sandwich structure with the micro channel structure in the middle.

 

| details |

 

Modelling of a Direct Linear Drive for Conveyor Belts

Bild zum Projekt Modellierung eines Lineardirektantriebs für Transportbänder

Researcher:

IAL, ITA

Duration:

2008 - 2011

Funded by:

DFG

Brief description:

In intralogistics, conveyor belts are used for cargo transportation. They are normally driven by means of a driving drum. To induce a feeding force, static friction is necessary between the conveyor and the driving drum. The spanning force in addition to the feeding force leads to a high mechanical charge of the conveyor belt. The maximum force determines the mechanical design of the belt. Linear drives located along the conveying line serve for reduction of force peaks and their distribution over the whole length of the conveyor belt, so that the traction carriers can be dimensioned to a smaller extent.

 

| details |

 

CogniLog - Cognitive Logistics for Warehousing

Bild zum Projekt CogniLog - Cognitive Logistiknetzwerke

Researcher:

ITA

Duration:

2008 - 2013

Funded by:

EFRE

Brief description:

Aim of the research project CogniLog is to investigate how autonomous subsystems can cooperate in a cognitive logistics network. Such network would reduce the complexity in the organisation, control and monitoring of the individual subsystems, thus increasing the degree of automation.

 

| details |

 

Automated Optical Inspection of Electronic Components

Bild zum Projekt Automatische optische Inspektion elektronischer Bauteile

Researcher:

TNT

Duration:

2008 - 2011

Funded by:

Industry

Brief description:

Within the scope of this BMWi-funded research project, inspection and classification methods for electronic components, as for example SMDs, are developed. For quality assurance, the proper processing of such components in electronic circuits shall be verified. The focus is laid on machine learning methods (boosting algorithms), which on the basis of training quantities allow the automated generation of the corresponding classifiers. In this learning process, a complex classifier is composed of a variety of simple parameters, as for example rectangular structures.

 

| details |

 

Ultra-Lightweight High-speed Bonder

Bild zum Projekt Ultraleichtbau-Hochgeschwindigkeits-Bonder

Researcher:

IDS, IW

Duration:

2008 - 2010

Funded by:

BMBF

Brief description:

Within the scope of the BMBF-funded project "ULH Bonder", the IDS works in cooperation with the Institute of Materials Science (IW) and the Co. Hesse and Knipps on an ultra-lightweight high-speed bonder for wedge-to-wedge bonding.

 

| details |

 

IdentProLog - Flexible Guidance in Production and Material Flow Logistics by Integration of Industrial Trucks into the Information Flow

Bild zum Projekt IdentProLog - Flexible Zielführung in Produktion und Materialflusslogistik durch vollständig in den Informationsfluss integrierte Flurförderzeuge

Researcher:

ITA

Duration:

2006 - 2009

Funded by:

BMBF

Brief description:

The advances in communication and information technologies and a worldwide economy require new logistics processes. To fit these requirements, more and more decentralized information technology will take place.

 

| details |

 

Spindle Test Bench

Bild zum Projekt Spindelprüfstand

Researcher:

PZH GmbH

Duration:

2006 - 2007

Brief description:

High-precision and high-speed metal cutting processes make high demands (e.g. torque, performance) on motor spindles applied in turning and milling machines. To handle the process of machining up to its maximum capacity, a detailed knowledge of the tool and spindle load is required. Due to the high dynamics in machining processes, combined (axial/radial/tangential) spindle loads can presently be investigated only in a limited way. Before this background, the PZH GmbH developed a novel spindle test bench to investigate the complete load spectrum acting on motor spindles during machining processes.

 

| details |

 

Gentelligent Components in their Lifecycle (SFB 653) - Components with Gentelligent Surfaces and Subsurface Zones

Bild zum Projekt Gentelligente Bauteile im Lebenszyklus (SFB 653)- 
Bauteiloberflächen und -randzonen mit gentelligenten  Eigenschaften

Researcher:

TNT, IFW

Duration:

2005 - 2013

Funded by:

DFG

Brief description:

Component data, as for example batch no., machining parameters or construction details, are normally stored in databases. Within the framework of the DFG-funded Collaborative Research Centre SFB 653 "Gentelligent Components in their Lifecycle", methods are investigated to store such data in the components themselves, i.e. to create gentelligent components. For this purpose, micro structures are applied to the component’s surface, which can be used for data storage. The data can for example describe the original state of an object. Another part of the project aims at giving the component the ability to „feel“, based on the respective residual stress of the subsurface zone. The residual stress of surfaces is reduced by overload, thus providing information on their stress history. The data stored in the micro structures can for example be used during an inspection to figure out the remaining life by analysing original and current state, so that a component is not exchanged, except it fails until the next inspection. In a third aspect, the identification of components based on their surface structure is investigated. By analysis of the characteristic surface parameters, each component can be allocated with a fingerprint similar to the one known from human beings. Within the scope of this research project, these features are additionally used to develop a state-of-the-art protection against plagiarism in the manufacturing of components.

 

| details |

 

Glue Line Scanner

Bild zum Projekt Leimspurscanner

Researcher:

PZH GmbH

Duration:

2005 - 2006

Brief description:

Within the scope of this project, an integrated glue line analysis for quality assurance of the manufacturing of rolling papers for cigarettes was developed.

 

| details |

 

Fast Machine Tool

Bild zum Projekt Schnelle Werkzeugmaschine

Researcher:

IFW, IRT, IDS

Duration:

1998 - 2004

Funded by:

DFG

Brief description:

The research group 'structure and control of highly dynamic machine tools', builts up a prototype of a 'Fast Machine Tool' in collaboration with IFW, IRT and IDS. The IFW develops the machine structure and the feed drives. The IDS explores the magnetically guided machine axis and the IRT provides for the necessary hardware and software. Using this novel electromagnetic bearing Z-axis, new options in the field of high-speed machining can be evaluated. Higher dynamics, as well as an increase in accuracy can be achieved through the active system 'magnetic guidance'.

 

| details |

 

PaLiDA – Parallel Kinematics with Linear Direct Drives

Bild zum Projekt PaLiDA - Parallelkinematik mit Lineardirektantrieben

Researcher:

imes, IFW

Duration:

2000 - 2006

Funded by:

DFG

Brief description:

The experimental platform PaLiDA is used at the Hannover Centre for Mechatronics within the DFG main focus program "Production Machines with Parallel Kinematics". This project exploits, analyses, and advances the advantages thanks to a combination of a parallel kinematic structure with high dynamic linear drives. This paves the way for the future use of parallel kinematics in the industrial production with an increased productivity.

 

| details |