1. Environmentally Friendly Fine Machining Process of Wood Taiwan China Wen-Ching Su * Yiren Wang and Huoh-Jong Shiau Good morning! Welcome to Taiwan!

2. Aim of work and methods A self-designed two-step surface planer with oblique angles of 15° and 20° used to machine China-fir, hard maple and red oak. Apparatus of two-step surface planer

3. Aim of work and methods The surface quality between one-set and two-set oblique cutting will be explored. The surface quality between one-set and two-set oblique cutting will be explored. The machined surfaces were compared to sanding and planning. The machined surfaces were compared to sanding and planning. Object

4. Results Fig.1 Chip formation It could produce different chips for the same oblique angle in cutting softwood and hardwood. China fir Hard maple

5. Results Fig.2 Surface roughness The peak of roughness profile was near the center line, that is, the latewood did not protrude the earlywood on the machining surface of surface planer. sanding surface planning surface oblique cutting surface

6. Results Fig.3 SEM observation of machining surface The surface structure of wood was crushed or torn after planning. The damage surface could removed by the two-step oblique cutting A-sanding surface, B-planning surface, C-oblique cutting surface planning surface sanding surface oblique cutting surface

7. Conclusions The planning surface processed by oblique cut once more could remove the deformation layer of surface to show the wood structure clearly Obtain a more fine and smooth surface.