Novel Finishing Process Development for Precision Complex-Shaped Hemispherical Shell by Bulk Plasma Processing

Investigation of a plain ball burnishing process on differently machined Aluminium EN AW 2007 surfaces

MATEC Web of Conferences ◽

10.1051/matecconf/201819011005 ◽

2018 ◽

Vol 190 ◽

pp. 11005 ◽

Cited By ~ 3

Author(s):

Marco Posdzich ◽

Rico Stöckmann ◽

Florian Morczinek ◽

Matthias Putz

Keyword(s):

Surface Roughness ◽

Process Parameters ◽

Process Development ◽

Fem Simulation ◽

Initial Surface ◽

Shape Deviation ◽

Finishing Process ◽

Path Distance ◽

Burnishing Process

Burnishing is an effective chipless finishing process for improving workpiece properties: hardness, vibration resistance and surface quality. The application of this technology is limited to rotationally symmetrical structures of deformable metals. Because of the multiaxial characteristics, the transfer of this force controlled technology on to prismatic shapes requires a comprehensive process development. The main purpose of this paper is the characterization of a plain burnishing process on aluminium EN AW 2007 with a linear moved, spherical diamond tool. The method of design of experiments was used to investigate the influence of different machined surfaces in conjunction with process parameters: burnishing force, burnishing direction, path distance and burnishing speed. FEM simulation was utilized for strain and stress analysis. The experiments show, that unlike the process parameters the initial surface roughness as 3rd order shape deviation does not have a significant influence on the finished surface. Furthermore a completely new surface is created by the process, with properties independent from the initial surface roughness.

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Roboterzelle zur Feinbearbeitung großer Werkzeuge*/Robot cell for the finishing of large tools and dies - Process development for robot-based polishing and grinding of injection moulds

wt Werkstattstechnik online ◽

10.37544/1436-4980-2015-06-3 ◽

2015 ◽

Vol 105 (06) ◽

pp. 351-359

Author(s):

E. Abele ◽

K. Haddadian ◽

F. Hähn ◽

D. Andrecht ◽

B. Luckas ◽

...

Keyword(s):

Process Development ◽

Strong Dependence ◽

Labor Cost ◽

Skilled Workers ◽

Process Step ◽

System P ◽

Competitive Disadvantage ◽

Finishing Process ◽

The Individual ◽

The Cost

Die manuelle Feinbearbeitung als letzter Prozessschritt der Spritzgießwerkzeugherstellung ist für die Produktqualität entscheidend. Da Qualität und Zeitaufwand wesentlich vom individuellen Geschick des Handwerkers abhängen, führen die hohen Lohnkosten und fehlende Fachkräfte zu einem signifikanten Wettbewerbsnachteil für den Werkzeug- und Formenbau in Deutschland. Um zukünftig den manuellen durch einen automatisierten Feinbearbeitungsprozess zu ersetzen, ist die Entwicklung eines robusten, industrietauglichen Robotersystems von essentieller Bedeutung.   Manual finishing as final process step in making tools is crucial for product quality. Today, the quality and the cost of tools depend very much on the individual skills of the experts. Due to high labor cost and a lack of skilled workers, the strong dependence on craftsmanship is a significant competitive disadvantage for tool making in Germany. To establish an automated finishing process on the market by replacing manual finishing, it is essential to develop a robust, industry-compatible, robotic system

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Simulation and Reliability Analysis of Laser-Welded Blanks after Metal Surface Finishing Process

International Journal of Manufacturing Materials and Mechanical Engineering ◽

10.4018/ijmmme.2012100101 ◽

2012 ◽

Vol 2 (4) ◽

pp. 1-11

Author(s):

Tanmay Pandit ◽

Ahad Ali

Keyword(s):

Simulation Model ◽

Process Development ◽

Expert Knowledge ◽

Surface Finishing ◽

Term Survival ◽

Metal Finishing ◽

Finishing Process ◽

New Process ◽

Process Reliability

Currently there is a huge competition amongst the OEMs and manufacturers in the auto industry to reduce the weight of the car. A few design modifications or use of different size and grades of materials solves this problem greatly. This paper focuses upon the metal finishing process of Laser Welded Blanks (LWB) with simulation and reliability as well as new process development. These blanks are of same gauge-same gauge or different gauge-different gauge materials. The main aim of this process was to remove the visible portion of the weld on the blank, so that it can be used as a body-outer. A new process was developed using expert knowledge and automated machinery tools. A simulation model was developed to compare with the actual developed method and to detect the bottlenecks and optimize the process. Reliability was a major concern during laser-welded blank operations. The paper addresses prediction of the amount of material removed based on the failed parts and visibility of the weld. This approach could provide competitiveness in the weight of the car which is directly related to fuel efficient and long term survival.

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Advanced TEM sample preparation techniques for submicron Si devices

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100138956 ◽

1995 ◽

Vol 53 ◽

pp. 516-517 ◽

Cited By ~ 1

Author(s):

P. B. Basham ◽

H. L. Tsai

Keyword(s):

Sample Preparation ◽

Process Development ◽

Light Transmission ◽

Specific Area ◽

Turnaround Time ◽

Small Hole ◽

Area Of Interest ◽

Transmission Electron ◽

Polished Side ◽

Preparation Techniques

The use of transmission electron microscopy (TEM) to support process development of advanced microelectronic devices is often challenged by a large amount of samples submitted from wafer fabrication areas and specific-spot analysis. Improving the TEM sample preparation techniques for a fast turnaround time is critical in order to provide a timely support for customers and improve the utilization of TEM. For the specific-area sample preparation, a technique which can be easily prepared with the least amount of effort is preferred. For these reasons, we have developed several techniques which have greatly facilitated the TEM sample preparation.For specific-area analysis, the use of a copper grid with a small hole is found to be very useful. With this small-hole grid technique, TEM sample preparation can be proceeded by well-established conventional methods. The sample is first polished to the area of interest, which is then carefully positioned inside the hole. This polished side is placed against the grid by epoxy Fig. 1 is an optical image of a TEM cross-section after dimpling to light transmission.

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Microstructural characterization of plasma-processed Ti-Al metal matrix composites

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100154731 ◽

1989 ◽

Vol 47 ◽

pp. 552-553

Author(s):

M. G. Burke ◽

M. N. Gungor ◽

M. A. Burke

Keyword(s):

High Temperature ◽

Titanium Aluminide ◽

Plasma Processing ◽

Microstructural Characterization ◽

High Temperature Strength ◽

Matrix Composites ◽

Intermetallic Matrix ◽

Long Time ◽

Strength And Stiffness ◽

Intermetallic Matrix Composites

Intermetallic matrix composites are candidates for ultrahigh temperature service when light weight and high temperature strength and stiffness are required. Recent efforts to produce intermetallic matrix composites have focused on the titanium aluminide (TiAl) system with various ceramic reinforcements. In order to optimize the composition and processing of these composites it is necessary to evaluate the range of structures that can be produced in these materials and to identify the characteristics of the optimum structures. Normally, TiAl materials are difficult to process and, thus, examination of a suitable range of structures would not be feasible. However, plasma processing offers a novel method for producing composites from difficult to process component materials. By melting one or more of the component materials in a plasma and controlling deposition onto a cooled substrate, a range of structures can be produced and the method is highly suited to examining experimental composite systems. Moreover, because plasma processing involves rapid melting and very rapid cooling can be induced in the deposited composite, it is expected that processing method can avoid some of the problems, such as interfacial degradation, that are associated with the relatively long time, high temperature exposures that are induced by conventional processing methods.

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The Structure and Properties of MoSi2 Thin Film in Mos Process

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s1431927600001379 ◽

1980 ◽

Vol 38 ◽

pp. 326-327

Author(s):

C.K. Wu ◽

P. Chang ◽

N. Godinho

Keyword(s):

Thin Film ◽

Integrated Circuits ◽

High Performance ◽

Large Scale ◽

Process Development ◽

Structure And Properties ◽

Metal Silicides ◽

High Oxidation ◽

Important Approach ◽

High Oxidation Resistance

Recently, the use of refractory metal silicides as low resistivity, high temperature and high oxidation resistance gate materials in large scale integrated circuits (LSI) has become an important approach in advanced MOS process development (1). This research is a systematic study on the structure and properties of molybdenum silicide thin film and its applicability to high performance LSI fabrication.

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