Waves on wood

Abstract

The rotary machining process as applied to timber is introduced and compared with the milling and grinding of metals. The emphasis of this work is on the waviness surface quality of the machined timber and initially focuses on a review of the techniques applied to improve surface quality at higher workpiece feed velocities—typically 120 m/min. The main work concentrates on mathematical and computer-based modelling of surface waviness defects generated by two classical woodworking machine engineering science phenomena, caused primarily by forced structural vibration. Surface assessment of machined timber is discussed, with results from contact and non-contact methods highlighted. The causes of surface waviness defects are presented and possible solutions are outlined.

Development of a novel profile measurement system for actively planed surfaces

“…This parameter is also highly suitable to quantitatively describe surfaces like the planed timber and similar materials reported here, as the waviness pattern is more important in this case as pointed out by Jackson et al [1]. The R sm values calculated for the sample profile traces obtained from the Talysurf and the DVD profiler are 12.55 mm and 12.75 mm respectively.…”

“…A great deal of research is being conducted to develop systems to evaluate a number of engineering surfaces e.g., wood [1], CNC turned metals [2], optical lenses [3], turbine blade assembly [4] and so on.…”

Mechatronic Design of a Novel Wood Moulder

“…Such displacements can be caused by spindle runout and excessive structural vibrations. Detailed investigation of surface waviness and influencing factors can be found in references [1], [10], and [11].…”

“…3). Despite being widely used, the term 'mouldings' is somewhat misleading since this is a material removal process and no material deformation as such takes place [1].…”

In-process surface profile assessment of rotary machined timber using a dynamic photometric stereo technique

“…During the process, the timber workpiece is fed into a revolving cutterhead. The cutters remove wood chips from the surface of the workpiece, thereby creating series of waves known as cuttermarks on the workpiece [1]. The sizes and uniformity of the cuttermarks are used to determine the quality of the surface finish.…”