Multi Material Micro Manufacture Network of Excellence - grinding

New Systematic and Time-Saving Procedure to Design Cup Grinding Wheels for the Application of Ultrasonic Assisted Grinding

Mon, 12 Nov 2007 16:23:32 +0000

C. Brecher(a)(b), R. Schug(b), A. Weber(b), C. Wenzel(b)
a: Werkzeugmaschinenlabor (WZL), RWTH Aachen University, Germany
b: Fraunhofer-Institute for Production Technology, Aachen, Germany

Abstract

Since glass and ceramic materials have beneficial properties they gain more importance in all technical applications during the last thirty years. For example nowadays ceramics are used as artificial hip joints or as seals for highest relative speeds. Glass components are used for multitude of optical applications like cameras and reflectors. But besides a lot of advantages the processing of these materials is very difficult. Particular, this contains the manufacturing of small components like micro-reactor plates or glass wafers with hundreds of small holes, too.

Using ultrasonic assisted grinding the treatment can significantly be optimised and higher removal rates can be realised. For the generation of ultrasonic waves often piezo actors are used that excite the grinding tools with vibrations of 20 kHz and amplitudes of a few microns. Using an ultrasonic wave the tool geometry is strongly restricted to guarantee the hybrid functionality. The paper describes a new way to calculate the design of tools suitable for their use in ultrasonic assisted grinding. As a machining process the manufacturing of spherical optics with cup grinding wheels is selected.

University of Naples Federico II

Wed, 10 Jan 2007 17:14:33 +0000

Facilities/Hardware:

Manufacturing processes and simulation
Contact and non-contact reverse engineering
Rapid product development
2D and 3D metrology systems
Advanced materials mechanical characterisation
Metallographic analysis
Nondestructive testing and evaluation
Intelligent sensor systems

RAS contact:
tetiro

Grinding/pulverizing technology applicable to silicon

Mon, 13 Nov 2006 11:49:18 +0000

4M Partner:
MEC, Cardiff

4M Partner No:
1

Collaborator Name:
Confidential

Proposal for extended project to RAS:
No

Technology enquiry/solution sought:

The collaborating company is looking to recycle silicon wafer by dispersing silicon particulate through a polymer carrier.
They have a supply chain available for the used silicon in flat pieces (0.6mm thick, various sizes), but have not secured a technology/process or supplier who can grind the silicon into fine granules;
- the required particle size is around 30micron,
- the finished dry 'powder' will have to be 99% pure silicon,

Monitoring and control of CBN grinding of Ni base alloy jet engine components

Fri, 27 Oct 2006 07:31:38 +0000

4M Partner:
University of Naples Federico II

4M Partner No:
25

Collaborator Name:
Avio Group SpA

Proposal for extended project to RAS:
Yes

Technology enquiry/solution sought:

The 4M affiliated partner Avio Group is a leading producer of aircraft engines that has had long term collaborations with the University of Naples Federico II in fields as diverse as metal processing, welding and brasing non traditional manufacturing, metrology, nondestructive evaluation, material characterisation, etc. Avio Group recently submitted a technological enquiry regarding Ni base alloy CBN grinding and related metrology aspects with particular attention to the micro features of the products of interest: turbine blades for jet engines.

KU Leuven

Tue, 12 Apr 2005 12:40:08 +0000

Facilities/Hardware:

K.U.Leuven is one of the three divisions of the department of Mechanical Engineering. PMA is active in the following areas: manufacturing processes, machine and instrument design, structural dynamics, acoustics, CAD/CAM/CIM, robotics, assembly automation, mechatronics, micro- and precision engineering, and metrology. The PMA division work includes original fundamental work as well as successful industry-oriented projects carried out in collaboration with small, medium and large companies and with international organisations like the European Space Agency. An important role of the research activities of the PMA division is based on international collaboration as shown by the participation of the division in more than 40 EC funded projects. The PMA division has also been nominated as Centre of Excellence by the Belgian Government.

RAS contact:
dominiek reynaerts

Cranfield University

Thu, 07 Apr 2005 08:54:13 +0000

Facilities/Hardware:

The activity at Cranfield University will involve the integration of activities in two areas: Nanotechnology and Precision Engineering. The Nanotechnology Group at Cranfield University, specialises in fusing micro-engineering and nanotechnology with the industrial application and development of functional materials (especially ferroelectric) to produce novel devices.

RAS contact:
Paul B Kirby

TNO Science and Industry

Thu, 31 Mar 2005 14:13:55 +0000

Facilities/Hardware:

TNO Industrial Technology increases the competitive strength of companies by providing them support in the development of products, materials and production processes. In order to solve our customers' problems and help them fulfil their ambitions, we combine our competences with the customers' own expertise and, if necessary, we involve other TNO institutes and third parties.

RAS contact:
Pieter Bolt