The research in mini, micro and desktop factories originates from early 90's and has continued since then by developing the technological basis and different technological building bricks and applications in the field of high-precision manufacture and assembly of future miniaturized and micro products. This has paved the way to mini, micro and desktop factories which are seen as one potential solution for that kind of production by improving space, energy and material resource utilization and answering to the needs of design for postponement and customer-close customization and personalization. The research efforts done during these years are now increasingly leading also to commercialization and real industrial applications. The objective of this paper is to present an overview of the international microfactory research and to introduce in more detail the modular microfactory concept developed in the M4-project.
In addition to micro assembly and micro manufacturing micro factories are currently widely studied around the world. However, the research is typically focusing on single machines and not so much on integration of single processes and machines into wider process chains and larger systems with integrated material logistics. This paper discusses issues related to realization of a larger scale integrated micro factory for assembly of multi-part products. Special attention is paid on the logistical aspects and control concepts supporting flexibility and dynamic reconfigurability of the system. A scenario of a microfactory system as a holonic manufacturing system enabling reactivity of the system to sudden changes and failure situations is also presented.
So far the desktop manufacturing is mainly done as islands of process modules or in some seldom cases the desktop factory is created in form of manufacturing line. Tampere University of Technology has been working on such desktop factory concepts for years and come out a microFactory concept (TUT-µF). The paper discusses architectural aspects and proposes some solutions for them. It specifies also two main mechatronic interfaces used for such modular desktop factories-1) the cell to cell interface and 2) cell internal process module interface. Main parts of the specifications are represented. These can be utilised for building the desktop production line from easily integrated modules.
Microassembly, micromanufacturing and microfactories are currently widely studied around the world. Tampere University of Technology (TUT) has had a strong background on microfactory research since 1999. This paper summarizes the results of the microfactory research accomplished at TUT during the recent projects. The paper introduces the TUT microfactory concept and discusses the demonstrations from the areas of assembly, laser machining and medical applications realized with TUT microfactory concept. It also presents some conceptual ideas for the factory level logistics of microfactory systems.
Abstract. The research in mini, micro and desktop factories originates from the early 90's and has continued since then by developing the technological basis and different technological building bricks and applications in the field of high-precision manufacturing and assembly of future miniaturised and micro products. This has paved the way for mini, micro and desktop factories which are seen as one potential solution for what kind of production by improving space, energy and material resource utilisation and answering to the needs of design for postponement and customer-close customisation and personalisation. This paper presents one case application for flexible micro factory. Application area is macro world assembly system in miniaturised form. Current trend in this research is the miniaturisation of macro world machines and systems towards more sustainable production technologies.
Abstract:This paper presents a test environment enabling the study of factors affecting on the success of a robotic precision assembly work cycle. The developed testing environment measures forces and torques occurring during the assembly, and uses a system based on machine vision to measure the repeatability of work picce positioning. The testing environment is capable of producing exactly known artificial positioning errors in four degrees-offreedom to simulate errors in work-piece positioning accuracy. The testing environment also measures the total duration of the robot work cycle as well as the durations of all essential phases of the work cycle. The testing environment is best suited for light assembly operations and has measurement ranges of *36 N and *0.5 Nm and the vision system has a field-of-view of 6 mm.The latter part of this paper presents the results of the research done in order to find out how some selected factors affect the assembly forces of robotic assembly. These factors include work piece and process parameters such as work piece material and design (chamferedistraight), positioning tolerances, and robot insertion motion speed.
This article introduces two scanner devices, which were used to study the possibilities of applying small vibratory motion in pulse laser machining. Small and fast oscillating motion is used in this research to decrease the pulse overlap of the pulsed fiber laser. When pulse overlap comes smaller the machining properties of the beam improve, because the previously vaporized metal does not cause power loss in the machining. Piezoelectric actuators have not been used much in certain scanner solutions, but they meet the speed and accuracy demands of many applications. This is mainly because the achievable work areas are small. Piezoelectric tip/tilt-mirror actuators that are commercially available have small scan angles when compared to galvanometer-based scanners. This research objective is to achieve better machining quality and to improve productivity.
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