Klaus Schützer

Integrated Process Planning Based on a Federative Factory Data Management

Manufacturing companies are confronted with short product life cycles, more variety of products and short cycles of leap innovations. This results in a higher frequency of changes in factory structures and an increasing importance of factory planning processes. Factory planning processes are characterized by participative and interdisciplinary processes due to various actors dealing in different domains and working in distributed environments. The result is a heterogeneous IT-landscape based on increasing use of multiple isolated and domain-specific IT tools and systems and hereby an increasing redundant, inhomogeneous and inconsistent data-holding. The control of these factory planning processes can be reached by holistic approaches and consistent system integration. The mean of system integration is the consideration of all domains involved in planning processes, used IT tools and systems and business processes. In this paper, the approach of a Federative Factory Data Management (FFDM) based on Service Oriented Architecture (SOA) and Semantic Model funded by the DFG (Germany) and CAPES (Brazil) will be described, which faces up the described challenges of factory planning processes. The focus of this approach is on the integration of isolated used IT tools for the dimensioning and structuring of factory systems, the generated domain-specific partial models as well as the coordination and synchronization of engineering workflows. In order of the control of factory planning processes the integration and coupling of the views of products, processes and resources on metadata level is required for a communication between different isolated and domain-specific IT tools of the various involved domains without losses or redundancies. The integration and coupling of these three views is based on a document independent factory structure description linked with factory defining metadata. In order to integrate and couple these different views, the relevant information and independencies are identified. Current reference process models for production and factory planning as well as the current methods to describe domain-specific models are analyzed. This is the basis for the development of the FFDM to build up a semantically coherent information model as a common communication and integration framework to represent the factory and to define and to access factory data. The goal of the presented approach is the increasing of planning harmonization, certainty, quality and frequency by a consistent information flow as well as the reduction of time of product development and factory planning processes.

Integrated Component Data Model Based on UML for Smart Components Lifecycle Management: A Conceptual Approach

Cyber-Physical Production Systems (CPPS) and Smart Products are considered key features in the development of the fourth industrial revolution. To create a connected environment in manufacturing based on CPPS, components must be able to store and exchange data with machines, and with other components and assemblies along the entire production system. At the same time, Smart Product features require that products and their components be able to store and exchange data throughout their entire lifecycle. Therefore, the aim of this paper is to present a preliminary integrated component data model based on Unified Modeling Language (UML) for the implementation of CPPS and Smart Product features. The development of the data model is based on requirements gathered both from the literature review and from corporate interviews with potential users. The results are still preliminary since the research results are part of a bigger research effort under an international collaboration network.

Deburring of Cross-Drilled Holes with Ball-End Cutters - Modeling the Tool Path

Machining of cross-drilled holes generates burrs on the entrance and exit. Deburring of these intersecting holes is challenging due to the limited accessibility. This paper presents a model that creates a tool path suitable for precision deburring of intersecting holes with a ball-end cutter. The presented model is developed with the help of Computer-Aided-Engineering. The tool generates a three-axis travel path related to the intersection geometry of the main and cross hole. The burr is removed and a constant chamfer is machined. The intersection curve is even machined through the main or cross bore. The presented model is verified by means of experiments with three different intersection samples using the material AlSi7Mg.

Digital Twin Technology – An Approach for Industrie 4.0 Vertical and Horizontal Lifecycle Integration

Abstract Digital Twin technology is increasingly gaining importance for digitizing industry. Even if digital twin technology still needs fundamental research, its significance for industry has become very visible, as digital twin technology is a key success factor to professionalize Cyber-Physical Systems (CPS) applications. Industrie 4.0 as an initiative to increase industrial added value is based on establishing connectivity between CPS and to enable communication between CPS. The industrial application scenarios for Industrie 4.0 aim at vertical and horizontal lifecycle integration concepts where digital twin technology plays an important role. This contribution explains major concepts of Industrie 4.0 and derives the role of digital twin technology. Furthermore, digital twin approaches are presented and as well as the proposal to use the STEP-technology (Standard for the Exchange of Product Model Data, ISO 10303) as a fundamental basis for a comprehensive digital twin technology.

Development of a Smart Assembly Data Model

Current technological advances pave the way for highly flexible production processes within Cyber-Physical Production Systems (CPPS). In a CPPS, every component being produced may be represented by a virtual data model containing its own unique information. Components are also information carriers with communication features enabled by an Internet-based exchange of information. The exchange of information between components and with the production system may happen over the whole manufacturing process. The availability of detailed information about every component supports the implementation of optimized assembly processes, called Smart Assembly of smart components. Smart Assembly is an approach to assembling different components according to unique specifications of every product variant, and considering the most efficient combination of components for each assembly. Therefore, a structured component data model considering data storage and data access is needed. However, for the Smart Assembly of smart components, the underlying data structure and processes have to be developed. The objective of this paper is to propose a data structure to enable the Smart Assembly of components in an assemble-to-order production scenario. To achieve the proposed objective, two use cases have been developed to simulate the Smart Assembly of smart components.

Linked Product and Process Monitoring in Smart Factories Based on Federative Factory Data Management

In the context of Smart Factories chances and challenges for the use of Federative Factory Data Management (FFDM) arise. Within Smart Factories involved systems, products and resources are equipped with Cyber-Physical Systems (CPS). The seamless integration of these CPS devices into networks provides the possibility for FFDM on world wide access to factory data. The actuality, but also the amount of data on all levels of the Smart Factory is continuously increasing. The need for new methods and tools for the representation and the presentation of this factory data is required. Combining the web technologies in the FFDM-approach on the one hand and the integration of CPS of Smart Factories into FFDM on the other hand allow new possibilities for the usage of mobile internet devices in FFDM. In this paper the concept for the employment of a mobile internet device as instrument for the presentation of FFDM-data is described. Parallel an approach for the integration of CPS based devices into the FFDM is described. As a representative scenario the monitoring of linked product data and process data in route sheets visualized within a mobile internet devices is described afterwards. The presented concept is transferred to a first prototypical implementation.Copyright

A web service application to support distributed manufacturing

Manufacturing as an industrial activity that starts with the conceptual project and ends with proper material disposal or its reuse has evolved from a centralized to a distributed process. The several components of the process are distributed according to space and time. This evolution was possible due to the support of information technology, which allows manufacturing data management. However, this evolution happened in an independent way in each process phase, creating isolated solutions and consequently a high heterogeneity in data management. The development of a Federative Factory Data Management offers a solution of a transparent support to the users who need to obtain information from different proprietary systems. As an example of a service that demonstrates the possibility of federative management of manufacturing data in service oriented architecture within a heterogeneous and flexible environment, this article presents the estimated calculation of the manufacturing time for a complex surface.