Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Frieder Scholz is active.

Publication


Featured researches published by Frieder Scholz.


European Journal of Wood and Wood Products | 2011

Dust-generation characteristics of hardwoods during sanding processes

Jegatheswaran Ratnasingam; Frieder Scholz; V. Natthondan; M. Graham

A study of the factors that influence dust-generation during the sanding process of Malaysian hardwoods was undertaken. It was found that the amount of wood removed during the sanding process predetermined dust-generation, although the wood density and abrasive grit used also played a role. Consequently, low density wood species produced higher dust-concentration due to its relative ease of sanding, and vice-versa. The results of the study suggest that minimizing dust-generation during the hardwood sanding process could be achieved by ensuring minimal amount of wood removal as well as the use of the coarsest possible abrasive grit in the process.ZusammenfassungUntersucht wurden die Faktoren, die beim Schleifen von malaysischem Laubholz einen Einfluss auf die Staubentwicklung haben. Es wurde gezeigt, dass die Stauberzeugung in erster Linie von der Abtragsmenge beim Schleifen von Holz abhing, obwohl Holzdichte und Schleifkörnung auch eine Rolle spielten. Folglich ergab sich bei Holzarten niedriger Dichte aufgrund ihrer leichten Schleifbarkeit eine höhere Staubkonzentration und umgekehrt. Die Ergebnisse der Untersuchung lassen darauf schließen, dass eine Minimierung der Stauberzeugung beim Schleifen von Hartholz durch Abtragung möglichst geringer Holzmengen sowie durch Verwendung der größtmöglichen Schleifkörnung erreicht werden kann.


Wood Material Science and Engineering | 2016

Surface generation and assessment for peripheral milling

Frieder Scholz; Jegatheswaran Ratnasingam; Michele Mazza; Georg Lachenmayr

Abstract The rotating tool during peripheral milling filters disturbing vibrations between half of the rotation frequency and frequencies assigned to half the time necessary to generate a single cuttermark. This is a relatively large gap in the frequency range being not copied onto the finished surface. Roughness readings returning frequencies in that range are caused by other reasons like secondary fracture effects or the internal structure of the material. Superposition of vibrations at frequencies close to the rotation frequencies may cause interference patterns looking similar to the lines of cuttermarks but without representing the rotating frequency or the frequency of the disturbing vibration. This can also happen for perfectly aligned edges.


European Journal of Wood and Wood Products | 2012

Tool recession in the processing of window scantling with innovative core materials

Ali Fathollahzadeh; Frieder Scholz; Thomas Keller

Three layer laminated lumber is extensively used in the manufacture of window frames. The insulating capacity is an important factor. Some producers are trying to expand the market and have introduced novel scantlings with higher insulating capacities into the market. The core layer of these scantlings was replaced by new materials. The three types are pressed cork, Polyurethane and Purenit. In this study the wear effects of wood scantling with new core layers on the recession of blades was studied. Four different types of tungsten carbide blades with different grain sizes (normal, fine, super fine and diamond coated) were used. Results show that Purenit is the most abrasive material for blades. The glue line is also a source of destruction for blades. The authors suggest that super fine coated blade is the best type for machining wood-Purenit scantling. The two other scantlings can be machined with normal grain coated carbide blade without difficulties.Zusammenfassung3-lagige Schichthölzer werden häufig bei der Herstellung von Fensterrahmen verwendet. Dabei spielt das Isoliervermögen eine wichtige Rolle. Einige Hersteller versuchen Fensterrahmen mit höheren Isolationseigenschaften auf dem Markt zu etablieren. Dabei wurde die Kernschicht der verleimten Fensterkantel durch neue Materialien ersetzt. Die drei verwendeten Isolationsmaterialien sind Kork, Polyurethan und Purenit. In dieser Studie wurde der Werkzeugverschleiß bei der Bearbeitung von solchen Holzrahmen mit einer neuen Kernschicht untersucht. Dabei wurden vier verschiedene Hartmetallschneiden (Normal, Fein, Superfein und Diamantbeschichtet) betrachtet. Die Ergebnisse zeigen, dass die Klebefuge, die die Holzlagen mit der Isolationsschicht verklebt, den größten Verschleiß am Werkzeug verursacht. Von den verwendeten Isolationsmaterialien ist Purenit das abrasivste Material. Von den getesteten Werkzeugen erwies sich Super Fine als am Besten geeignet für die Bearbeitung von Purenit. Die Kanteln mit der Kork- bzw. Polyurethanschicht verursachten nur geringen Verschleiß am Werkzeug.


European Journal of Wood and Wood Products | 2007

Characterizing surface defects in machine-planing of rubberwood (Hevea brasiliensis)

Jegatheswaran Ratnasingam; Frieder Scholz


European Journal of Wood and Wood Products | 2010

Drying quality of rubberwood: an industrial perspective

Jegatheswaran Ratnasingam; Rainer Grohmann; Frieder Scholz


European Journal of Wood and Wood Products | 2008

Yield studies of rubberwood lumber during rough milling operations

Jegatheswaran Ratnasingam; Frieder Scholz


European Journal of Wood and Wood Products | 2014

Effects of pre-steaming on the drying quality of Rubberwood

Jegatheswaran Ratnasingam; Rainer Grohmann; Frieder Scholz


European Journal of Wood and Wood Products | 2009

Minimizing dust emission during routing operation of rubberwood

Jegatheswaran Ratnasingam; Frieder Scholz; Vidja Natthondan


European Journal of Wood and Wood Products | 2013

Cutting forces in bandsaw processing of oak and beech wood as affected by wood moisture content and cutting directions

Payam Moradpour; Kazem Doosthoseini; Frieder Scholz; Asghar Tarmian


European Journal of Wood and Wood Products | 2009

Optimization of finger-jointing in rubberwood processing

Jegatheswaran Ratnasingam; Frieder Scholz

Collaboration


Dive into the Frieder Scholz's collaboration.

Top Co-Authors

Avatar
Researchain Logo
Decentralizing Knowledge