scholarly journals Feeling Machine for Process Monitoring of Turning Hybrid Solid Components

Metals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 930
Author(s):  
Berend Denkena ◽  
Benjamin Bergmann ◽  
Matthias Witt
Keyword(s):  
Process Monitoring ◽  
Production Systems ◽  
Monitoring Systems ◽  
Innovative Design ◽  
Turning Operations ◽  
Design Concepts ◽  
Control Signals ◽  
Transition Position ◽  
Longitudinal Turning ◽  
First Time

The realization of the increasing automation of production systems requires the guarantee of process security as well as the resulting workpiece quality. For this purpose, monitoring systems are used, which monitor the machining based on machine control signals and external sensors. These systems are challenged by innovative design concepts such as hybrid components made of different materials, which lead to new disturbance variables in the process. Therefore, it is important to obtain as much process information as possible in order to achieve a robust and sensitive evaluation of the machining. Feeling machines with force sensing capabilities represent a promising approach to assist the monitoring. This paper provides, for the first time, an overview of the suitability of the feeling machine for process monitoring during turning operations. The process faults tool breakage, tool wear, and the variation of the material transition position of hybrid shafts that were researched and compared with a force dynamometer. For the investigation, longitudinal turning processes with shafts made of EN AW-6082 and 20MnCr5 were carried out. The results show the feeling machine is sensitive to all kinds of examined errors and can compete with a force dynamometer, especially for roughing operations.

Process Monitoring for Manufacturing of Critical Aero Engine Components: An Overview

2014 ◽  
Author(s):  
Dražen Veselovac ◽  
Sascha Gierlings ◽  
Matthias Brockmann
Keyword(s):  
Process Monitoring ◽  
Production Systems ◽  
Failure Process ◽  
Capacity Utilization ◽  
Monitoring Systems ◽  
Complex Task ◽  
Tool Breakage ◽  
Aero Engine ◽  
Important Means ◽  
Engine Components

Modern production systems stand out due to an increasing degree of capacity utilization of the efficiency available through the production process. As working on a technological threshold as well as on a complex task comes along with an increase of susceptibility to failure, process monitoring is an important means to avoid damage to machines, tools, and component parts and a consequent machine downtime. In order to bring about detection of tool breakage, overload and tool wear, we use different sensor and monitoring systems which are adjusted to the process in the best possible way. This paper gives an overview of existing process monitoring solutions, especially in the field of aero engine manufacturing.

Process monitoring systems and education in their use

1986 ◽  
Vol 190 ◽  
pp. 99-106 ◽  
Author(s):  
E. Pungor ◽  
T. Cserfalvi
Keyword(s):  
Process Monitoring ◽  
Monitoring Systems

Upgrade of Plate Heat Exchanger at Optimal Cost Through Core Pack Plate Welding Modification

2021 ◽  
Author(s):  
Khaled M. Mazen Al Khoujah ◽  
Antonio - Medina ◽  
Juma Rashid Al Qaydi ◽  
Jawwad Kaleem ◽  
Fatima Hassan Al Mansoori ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
New Technologies ◽  
Plate Heat Exchanger ◽  
Innovative Design ◽  
Plate Heat ◽  
Optimal Cost ◽  
Operating Modes ◽  
Gas Processing ◽  
Maximum Benefit ◽  
First Time

Abstract An innovative design was implemented as a solution for the repetitive failure of a plate heat exchanger installed at Gas Processing Facilitates due to weld cracking, the new design was introduced for the first time in the facility, demonstrating the novelty of utilizing new technologies and enhanced designs in Heat Exchangers used for gas processing. The main challenges were in accommodating various operating modes and ensure the prevention of reoccurrence of the failures. The success was achieved through the collaboration between the operating company and Industry experts in heat transfer equipment to replace the existing design at the gas processing Facilitates with no change in piping layouts, hence, performing the replacement at optimal cost and maximum benefit.

scholarly journals Studies on nitrogenase activity of diazotrophic isolates from different rice production systems

2016 ◽  
Vol 8 (1) ◽  
pp. 284-289
Author(s):  
S. Kanimoli ◽  
K. Kumar
Keyword(s):  
Acetylene Reduction ◽  
Tamil Nadu ◽  
Production Systems ◽  
Nitrogenase Activity ◽  
Rice Production ◽  
Lowland Rice ◽  
Aerobic Rice ◽  
Marked Variation ◽  
Reduction Assay ◽  
First Time

The present study was carried out to evaluate the nitrogen fixing ability of diazotrophs isolated from the rhizosphere soils of rice which were grown in three different rice growing systems. A total of hundred and ten isolates obtained were subjected to Acetylene Reduction Assay (ARA) and ninety eight isolates recorded significant amount of nitrogenase activity in a range of 185.73 to 3794.55 nmoles of ethylene mg of protein-1 h-1. The highest nitrogenase activity was recorded by Derxia (3794.55 nmoles of ethylene mg of protein-1 h-1) isolated from Trichy (lowland). Among the three different rice production systems, isolates obtained from lowland rice (Derxia – 3794.5 nmoles of ethylene mg of protein-1 h-1) recorded higher nitrogenase activity followed by Aerobic (Pseudomonas - 2194.89 nmoles of ethylene mg of protein-1 h-1) and SRI (Azotobacter - 1971.85 nmoles of ethylene mg of protein-1 h-1) rice isolates. The results revealed marked variation in the ARA of the diazotrophic isolates obtained from lowland, SRI and Aerobic rice. The nitrogenase activity of diazotrophs from rice fields have been reported earlier but the nitrogenase activity of diazotrophs from three different rice production systems from various parts of Tamil Nadu is reported for the first time from India.

scholarly journals Innovative design concepts for the LMF target chamber and related systems

1989 ◽  
Author(s):  
R. Bourgue ◽  
E. Cheng ◽  
R. Creedon ◽  
K. Schultz ◽  
D. Sonn
Keyword(s):  
Target Chamber ◽  
Innovative Design ◽  
Design Concepts

Anwenderfreundliche Prozessüberwachungssysteme/User-friendly Process Monitoring Systems

2020 ◽  
Vol 110 (06) ◽  
pp. 435-439
Author(s):  
Berend Denkena ◽  
Benjamin Bergmann ◽  
H. Tobias Stiehl
Keyword(s):  
Process Monitoring ◽  
Expert Knowledge ◽  
Monitoring Systems ◽  
User Friendly ◽  
Monitoring Performance ◽  
Economic Use ◽  
Selection Of

Prozessüberwachungssysteme reduzieren Ausschuss und Stillstände. Allerdings schränken die prozessspezifische Parametrierung und das erforderliche Expertenwissen den wirtschaftlichen Einsatz der Systeme ein. Dieser Beitrag stellt nachvollziehbare und automatische Ansätze zur Auswahl geeigneter Signale, ihrer Verarbeitung und Bildung von Überwachungsgrenzen vor. Die Ergebnisse zeigen, dass die damit erreichte Überwachungsleistung vergleichbar mit einer Konfiguration durch geschultes Personal ist.   Process monitoring systems reduce scrap, rework and downtime. However, process-specific parameterization and the required expert knowledge limit the economic use of the systems. This article presents approaches to the autonomous and comprehensible parameterization of systems covering the selection of suitable signals, their processing and the formation of monitoring limits. The results show that the achieved monitoring performance is comparable to a configuration by experts.

Steel Bridges with Double-Composite Action: Innovative Design

2000 ◽  
Vol 1696 (1) ◽  
pp. 299-309 ◽  
Author(s):  
Steven L. Stroh ◽  
Rajan Sen
Keyword(s):  
Cost Savings ◽  
Cost Effective ◽  
The United States ◽  
South Florida ◽  
Steel Bridge ◽  
Innovative Design ◽  
Composite Action ◽  
Design Concepts ◽  
Negative Moment ◽  
Composite Bridge

Bridge engineers are continually faced with the challenge of providing efficient and cost-effective structures. In particular, the Florida Department of Transportation has recognized the need to develop economical bridge configurations in the medium-span range of 200- to 400-ft (60.96-to 121.92-m) spans and authorized a research project at the University of South Florida to identify and develop innovative design concepts within this span range. The study identified the concept of a steel bridge with double-composite action as an innovative bridge concept with the potential for significant cost savings compared with conventional modes of construction. This bridge type has been used with good success in Europe, but to the authors’ knowledge it has not been used in the United States. In addition to a composite concrete top slab, the double-composite bridge concept utilizes a composite concrete bottom slab in the negative moment regions. The result is provision of a design meeting compact requirements throughout, increased stiffness with corresponding decrease in fatigue stress range and deflections, savings in cross frames, and savings in flange material. The design implications of this system are examined, including redistribution effects due to creep and shrinkage, implications of different construction sequences, and strength and serviceability issues. Trial designs are presented, including both plate and box girder type structures, and design considerations are discussed. A prototype structure is identified for further development of the double-composite concept.

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