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Bildmarke

Development of a new type of diesel-electric single wheel drive for tractors and self-propelled harvesters

The collaborative partners involved are:

  • Fischer Elektromotoren GmbH
  • Technische Universität Dresden

The aim of the collaborative project was to develop a new type of diesel-electric single wheel drive for tractors and self-propelled harvesters.

In so doing, the research and development work had the following tasks as a focus:

  • The diesel-electric single wheel drive should be designed as a continuous drive without a switching stage across the entire speed range of the machine to be driven.
  • The design of the diesel-electric single wheel drive should be oriented around current scientific and technical progress and should also address future needs. Previous studies can be used to determine the required tensile forces.
  • With regard to the allowable space and the weight of the drives, a very high level of energy density needs to be attained in terms of the electric motors.
  • The electrical single wheel drive is to be designed in such a way, that independent and reliable operation of the drives is guaranteed.
  • Good access to the drive motors and the drive transmission should be observed in the construction of the axis for the mobile test device.
  • In the design and installation of auxiliary equipment which is also necessary for the autonomous operation of the test devices, the main components should not be limited in terms of their functionality.
  • The control and regulation of the test devices is to be developed in a way which is user-friendly and user-oriented. In addition, a contingency plan is to be provided for unforeseen events or conditions so that if a problem emerges, the test device can then be transferred to a safe state.
  • The partial results from the development will first be developed on a drive test station and then put to the test and optimised in a mobile test device in order to provide evidence of functionality.

The two collaborative partners supported each other by cooperating with respect to the sub-tasks. As a research organisation, TU Dresden mainly worked on the theoretical problems and scientific work associated with the project. On the one hand, this included the creation of a catalogue of requirements that the diesel-electric drive was to fulfill and on the other hand, the design and construction of the test devices and the development of the control and regulation units for the diesel-electric drive system and the test devices.

Download >> Final report for the development project by TU Dresden

Development of an integrated, sensor-free profile rail linear drive (SPLA) as a modular building block system

The collaborative partners involved are:

  • Fischer Elektromotoren GmbH
  • Hochschule Aalen

The aim of the collaborative project is the development of an integrated, sensor-free profile rail linear drive (SPLA) for use in many applications with medium-level positioning accuracy and movement.

Profile rails with corresponding carriages form a starting point. A linear motor is provided on the underside of the profile rails which is directly coupled to the above carriage and this forms a unit. In accordance with the variably designed end caps, the link to the machine console takes place using screw connections.

 

Development of a high-speed five-axis cutting centre for processing technical textiles

The collaborative partners involved are:

  • Fischer Elektromotoren GmbH
  • Fa. SETEC

The aim of the cooperation project was the development of high-speed five-axis cutting centre for processing technical textiles which in terms of its performance and flexibility, clearly stands out from machines representing the current state of technical progress.

The high-speed cutting centre can be used in a wide variety of applications:

  • Clothing industry
  • Shoe industry
  • Leather goods industry
  • Processing of wood, veneer
  • Aerospace industry
  • Boatbuilding
  • Vehicle painting
  • Handling
  • Automobile industry (upholstery, carpets, footmats, panelling)
  • In all applications where shapes for surfaces are cut.

Set up:

  • Cutting table, upon which the material to be cut is laid out with a variable vacuum device for fixing the material.
  • Beam construction as an x- or longitudinal.
  • Linear drive (x-axis) which the y-axis is coupled to. The y-axis carries out a +- 60 °C oscillation with a coupled ‘swing arm’.
  • The swing arm finishes in a tangential axis which always points the cutting blade in the cutting direction, i.e. multiple rotation around 360 °C.
  • Alternatively, mechanical cutting can be replaced by laser cutting.


How the system works:

The material to be cut is placed on the cutting table and moves slowly, but steadily.
Through the combination of the aforementioned axes, it is possible to access each point on the cutting table in a targeted and precise way with the help of the control unit which is based on polar coordinates. In order to process any shape as a blank, the control unit always allows the cutting blade or the cutting beam to be brought to the necessary position/direction of work.