High Quality Magnesium Sheets for Automotive Applications

2005 ◽  
Vol 6-8 ◽  
pp. 665-672 ◽  
Author(s):  
Friedrich Wilhelm Bach ◽  
M. Rodman ◽  
A. Rossberg
Keyword(s):  
Automotive Industry ◽  
Metal Forming ◽  
Machine Tools ◽  
Closed Loop ◽  
Process Chain ◽  
Testing Methods ◽  
High Quality ◽  
Industrial Practice ◽  
Key Factor ◽  
Complete Process

In order to make magnesium sheets a competitive material alternative for highly sophisticated light-weight constructions the complete process chain for their production has to be investigated. In laboratory scale new alloys, casting techniques and optimized rolling and heat treatment schedules have been developed. At the Institute for Metal Forming and Metal Forming Machine Tools (IFUM) the forming capacity of magnesium sheets has been investigated. Derived from the strict quality requirements of e.g. the automotive industry, testing methods concerning mechanical properties, corrosion resistance and surface quality have been developed. It has been shown that the controlled development of a suited microstructure is the key factor for ensuring the requested product properties. Together with research and manufacturing partners the results were transferred to industrial practice and a closed loop process chain for the production of high quality magnesium sheets has been established.

scholarly journals Measuring the bore straightness during reaming with sensoric tools

2020 ◽  
Vol 14 (4) ◽  
pp. 535-544
Author(s):  
Andreas Bretz ◽  
Eberhard Abele ◽  
Matthias Weigold
Keyword(s):  
Mass Production ◽  
Cost Efficiency ◽  
Machine Tools ◽  
Processing Time ◽  
Process Chain ◽  
Machining Processes ◽  
High Quality ◽  
Random Samples ◽  
Hydraulic Valves ◽  
Productive Time

Abstract Reaming plays a crucial role in production to meet the high quality requirements of precision bore machining. It is either directly responsible for the final component quality or influences subsequent processes such as honing. The narrow tolerances are usually monitored by measuring random samples in mass production due to cost efficiency. Having a closer look at an exemplary process chain for the production of hydraulic valves shows the possibility to adapt the honing parameters which reduces processing time and costs. However, the bore straightness after the reaming process has to be known. In this paper an approach is presented which allows to record the bore straightness within the productive time. For this purpose, a sensory reaming system is developed. It can be used without additional components in the machine tool and thus integrated into existing machining processes. Cutting tests show that the system is able to measure the bore straightness as good as sensing probes used in machine tools.

scholarly journals EDCrammer: An Efficient Caching Rate-Control Algorithm for Streaming Data on Resource-Limited Edge Nodes

2019 ◽  
Vol 9 (12) ◽  
pp. 2560 ◽  
Author(s):  
Yunkon Kim ◽  
Eui-Nam Huh
Keyword(s):  
Intelligent Transportation System ◽  
Streaming Data ◽  
Data Traffic ◽  
High Quality ◽  
Data Caching ◽  
Resource Limited ◽  
Quality Video ◽  
Key Factor ◽  
Efficient Data ◽  
Art Research

This paper explores data caching as a key factor of edge computing. State-of-the-art research of data caching on edge nodes mainly considers reactive and proactive caching, and machine learning based caching, which could be a heavy task for edge nodes. However, edge nodes usually have relatively lower computing resources than cloud datacenters as those are geo-distributed from the administrator. Therefore, a caching algorithm should be lightweight for saving computing resources on edge nodes. In addition, the data caching should be agile because it has to support high-quality services on edge nodes. Accordingly, this paper proposes a lightweight, agile caching algorithm, EDCrammer (Efficient Data Crammer), which performs agile operations to control caching rate for streaming data by using the enhanced PID (Proportional-Integral-Differential) controller. Experimental results using this lightweight, agile caching algorithm show its significant value in each scenario. In four common scenarios, the desired cache utilization was reached in 1.1 s on average and then maintained within a 4–7% deviation. The cache hit ratio is about 96%, and the optimal cache capacity is around 1.5 MB. Thus, EDCrammer can help distribute the streaming data traffic to the edge nodes, mitigate the uplink load on the central cloud, and ultimately provide users with high-quality video services. We also hope that EDCrammer can improve overall service quality in 5G environment, Augmented Reality/Virtual Reality (AR/VR), Intelligent Transportation System (ITS), Internet of Things (IoT), etc.

scholarly journals High-quality net shape geometries from additively manufactured parts using closed-loop controlled ablation with ultrashort laser pulses

2020 ◽  
Vol 9 (1-2) ◽  
pp. 101-110 ◽  
Author(s):  
Daniel Holder ◽  
Artur Leis ◽  
Matthias Buser ◽  
Rudolf Weber ◽  
Thomas Graf
Keyword(s):  
Surface Roughness ◽  
Closed Loop ◽  
High Surface ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Minimum Thickness ◽  
High Quality ◽  
Surface Optical ◽  
The Individual ◽  
Ultrashort Laser

AbstractAdditively manufactured parts typically deviate to some extent from the targeted net shape and exhibit high surface roughness due to the size of the powder grains that determines the minimum thickness of the individual slices and due to partially molten powder grains adhering on the surface. Optical coherence tomography (OCT)-based measurements and closed-loop controlled ablation with ultrashort laser pulses were utilized for the precise positioning of the LPBF-generated aluminum parts and for post-processing by selective laser ablation of the excessive material. As a result, high-quality net shape geometries were achieved with surface roughness, and deviation from the targeted net shape geometry reduced by 67% and 63%, respectively.

Technologies of personnel training and development in the organization

2021 ◽  
Author(s):  
Marina Polevaya ◽  
Igor' Belogrud ◽  
Irina Ivanova ◽  
Elena Kamneva ◽  
Valentina Maslova ◽  
...  
Keyword(s):  
Personnel Management ◽  
Professional Training ◽  
Training And Development ◽  
Personnel Training ◽  
High Quality ◽  
Modern Economy ◽  
Key Factor ◽  
Training Courses ◽  
Management Students ◽  
Psychological Features

In the modern economy, high-quality personnel is a key factor for the success of an organization. The success of the organization directly depends on the degree of qualification of the staff. The textbook presents technologies, methods and types of personnel training and development; legal and organizational aspects of professional training; socio-psychological features of personnel training and development; the basics of forming and managing the personnel reserve in the organization, as well as methods for evaluating the effectiveness of personnel training and development in the organization. It is intended for students studying in the direction of training "Personnel Management", students of institutes and advanced training courses, employees of personnel management services, managers of enterprises and organizations.

scholarly journals Features and Characteristics of Motorized and Non-Motorized Milling Spindles

2020 ◽  
Vol 9 (4) ◽  
pp. 1095-1100
Keyword(s):  
Machine Tools ◽  
Cutting Tools ◽  
Control Device ◽  
Common Type ◽  
Machining Process ◽  
Industrial Practice ◽  
Quality Of Products ◽  
Efficiency And Reliability ◽  
Reliability And Availability

The Cutting process used in milling is one of the most common type of industrial machining methods. Similar to traditional milling spindles, the motor driven spindles are fitted with an integrated motor, thereby eliminating belts and gears for the transmission of power from the motor to the cutting tools. The innovative machine tools should be highly characterized systems in order to retain the necessary precision, efficiency and reliability. To satisfy their end user's reliability and availability requirements, both the spindle system (Tool/Tool-Holder/ Spindle) and motor tool system need to be configured for their usability and output results. However, the quality of a control device in industrial practice is greatly affected by the spindle cutting output and its reliability. The motor spindles are nothing but the rotating drive shafts which acts as axes for cutting force tools or in machining process for holding cutting instrument. Hence the spindles are one of the important factor in machining tool process and productivity, as these are used to produce parts as well as machines that produce components, which in turn have a significant impact on production levels and quality of products.

Proved Quality by Online Monitoring and Closed-Loop Control of Pin Insertion

2015 ◽  
Vol 807 ◽  
pp. 140-149
Author(s):  
Maximiliane Erhardt ◽  
Carsten Kaschube ◽  
Markus Menacher
Keyword(s):  
Closed Loop ◽  
Online Monitoring ◽  
Robert Bosch Gmbh ◽  
Closed Loop Control ◽  
Assembly Process ◽  
High Quality ◽  
Loop Control

To provide high quality in production and assembly processes need to be controlled. This paper analyzes the effect and necessity of online monitoring and closed-loop control of pin insertion. In this investigation pin insertion is an assembly process wherein metallic pins are pressed into polymer structures. The investigations described in this paper are made at the Robert Bosch GmbH and according to their requirements towards production standards, quality and traceability.

An Infrastructure to Support Closed Loop Product Development Practice Coupled With Rapid Prototyping

1998 ◽  
Author(s):  
Shuichi Fukuda ◽  
Ping-Yu Jiang
Keyword(s):  
Product Development ◽  
Rapid Prototyping ◽  
Quality Function Deployment ◽  
Closed Loop ◽  
Design Procedure ◽  
Optimal Solution ◽  
Chain Process ◽  
Process Chain ◽  
Rp Process ◽  
Development Practice

Abstract This paper deals with a methodology to use rapid prototyping and tooling to aid the product development practice. Under the support of the distributive activity scheduling mechanism and the unified product data model, a closed loop is described, which consists of design-phase-oriented requirement analysis of RP/RT applications, multi-criterion decision-making mechanism for selecting the combination of materials, RP method, and RP process chain, process planning for rapid prototyping and tooling, data collections from RP manufacturing, design evaluations based on manufactured prototypes, as well as case-based learning from RP process chain. Here, quality function deployment is used for quality control and assurance of such a design closed cycle. Several such closed loops during product design procedure will make the product go to a optimal solution. In addtion, concurrence and competence issues inside a closed loop design evaluation cycle are also discussed. Finally, a conclusion about this methodology is drawn.

scholarly journals A Retrospective of Materials Synthesis at the Paul Scherrer Institut (PSI)

2020 ◽  
Vol 5 (4) ◽  
pp. 55
Author(s):  
Kazimierz Conder ◽  
Albert Furrer ◽  
Ekaterina Pomjakushina
Keyword(s):  
Condensed Matter ◽  
Materials Synthesis ◽  
High Quality ◽  
Key Factor ◽  
Paul Scherrer

The availability of high-quality and well characterized materials is a key factor for condensed-matter research [...]

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