A Method of Lathe Checks Measurement; SMOF device and its software

Pałubicki, Bartosz; Marchal, Roland; Butaud, Jean-Claude; Denaud, Louis; Bléron, Laurent; Collet, Robert; Kowaluk, Grzegorz

doi:10.1007/s00107-009-0360-y

Cited by 37 publications

(36 citation statements)

References 3 publications

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“…As soon as the shear strength of green wood is exceeded, lathe checks appear (Thibaut and Beauchêne, 2004). For homogeneous species like beech, checks are almost periodic (Denaud et al, 2012;Palubicki et al, 2010).…”

Section: Resultsmentioning

confidence: 99%

Analysis of chip formation mechanisms and modelling of slabber process

Pfeiffer¹,

Collet²,

Denaud³

et al. 2014

Wood Sci Technol

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Analysis of chip formation mechanisms and modelling of slabber processAbstract During the primary transformation in wood industry, logs are faced with conical rough milling cutters commonly named slabber or canter heads. Chips produced consist of raw materials for pulp paper and particleboard industries. The process efficiency of these industries partly comes from particle size distribution. However, chips formation is greatly dependent on milling conditions and material variability.Thus, this study aims at better understanding and predicting chips production in wood milling. The different mechanisms of their formation are studied through orthogonal cutting experiments at high cutting speed for beech and Douglas fir. Within these conditions, ejection of free water inside wood can be observed during fragmentation, particularly on beech. As previously seen in quasi-static experiments, chip thickness is proportional to the nominal cut thickness. Moreover, the grain orientation has a great influence on the cutting mechanisms, so as the nominal cut and the grows circles widths. This chip fragmentation study finally allows the improvement of the cutting conditions in rough milling.In order to optimize machine design as well as cutting geometry, a geometrical model of a generic slabber head is developed. This model allows the study of the effective cutting kinematics, the log-cutting edges interactions and the effective wood grain direction during cutting. This paper describes the great influence of the carriage position on cutting conditions. The results obtained here can be directly used by milling machine manufacturers.

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Section: Resultsmentioning

confidence: 99%

Analysis of chip formation mechanisms and modelling of slabber process

Pfeiffer¹,

Collet²,

Denaud³

et al. 2014

Wood Sci Technol

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“…Lathe check phenomenon is largely influenced by wood anatomy ). Distribution of both depth and occurrence of checks, measured on a large experimental material with a special apparatus produced by SMOF© (Pałubicki et al 2010), fit a Gaussian curve. As long as the veneer can be manipulated, rather deep cracks are allowed.…”

Section: °/90°modementioning

confidence: 99%

Wood machining with a focus on French research in the last 50 years

Thibaut

Denaud

Collet

et al. 2016

Annals of Forest Science

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Abstract& Key message Wood machining is compulsory both for timber separation and the surfacing of wooden objects. The anisotropy, cellular nature and multi-scale level organisation of wood make its cutting complicated to study. During the last 50 years, most of the wood machining subjects were covered by French teams. & Context Woodcutting is a very old technology but scientific research is scarce on the subject. In the last 50 years, much work on basic mechanisms as well as on industrial processes has been done in France. In primary conversion such as sawing, veneer cutting or green wood chipping, huge progress comes from automation and the possibility of linking the process to log and product quality through new sensors. In secondary processing, much has been done on the links between the cutting process, surface qualification and the properties of these surfaces for further processing, such as gluing or coating. Tool wear depends on the cutting process, timber quality and species. Tradeoffs are required in tool technology and coating technologies may improve tool life. & Conclusion A large amount of knowledge and innovation has come from 50 years of worldwide research effort, with France being particularly active in this period. The transfer of skills from metals cutting industry was often a key, but much is needed to move closer to both metal cutting sector and woodcutting skills among craftsmen.

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“…The rupture of the ribbon due to edge effects was not taken into account in the visual score. More detailed assessments of veneer thickness profiles and check characteristics were done using a specifically designed apparatus (SMOF) and assessment methodology as described by Palubicki et al (2010).…”

Section: Veneer Quality Assessmentmentioning

confidence: 99%

Experimental Investigation on Rotary Peeling Parameters of High Density Coconut Wood

Baillères¹,

Denaud²,

Butaud³

et al. 2015

BioResources

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Substantial quantities of senile coconut palms are present in plantations within the Asia-Pacific region. Once coconut palms become over-mature, their production of traditional products, such as coconuts, significantly decreases, resulting in profitability challenges for farmers. Presently, few profitable markets exist for over-mature, senile coconut palms. Using the coconut palm stem in composite or engineered wood products could, however, provide an attractive alternative. Due to some of its unique characteristics, a processing system able to recover wood from the highdensity zone near the stem periphery is desirable. A series of rotary veneer laboratory trials were undertaken to establish fundamental benchmark lathe settings and veneering characteristics for coconut palm stems. Different pressure bar configurations, billet pre-treatment temperatures, and veneer thicknesses were tested, and the resulting cutting forces and veneer quality were assessed. Optimal setting recommendations for peeling coconut wood are provided.

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A Method of Lathe Checks Measurement; SMOF device and its software

Cited by 37 publications

References 3 publications

Analysis of chip formation mechanisms and modelling of slabber process

Analysis of chip formation mechanisms and modelling of slabber process

Wood machining with a focus on French research in the last 50 years

Experimental Investigation on Rotary Peeling Parameters of High Density Coconut Wood

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