The chips generated during up-milling and down-milling of pine wood by helical router bits

Machining aspects with helical edge router bits (helix angle 15°, 30°, 45°, and 60°) with a cutting circle diameter of 8 mm were studied. The purpose of the research work was to investigate chip formation and surface roughness characteristics in milling pine wood by the straight and helical edge bits. The chips generated could be classified into four types by sieving into spiral chip (5 mesh), flow chip (10 mesh), thin chip (30 mesh), and granule chip (< 30 mesh). The experimental results show that spiral chips were generated most often (on a weight percentage basis) by the bits during down-milling process. More flow and thin chips were produced by the bits during up-milling process. Better surface roughness was produced by bits during down-milling compared to up-milling. With increasing helix angle of the bits, the amount of spiral and flow chips increased and granule chips were reduced. The machined surface produced was better in roughness (lower Ra values) as the helix angle of the bits increased both in up-milling and down-milling processes.

[1]  U. Heisel,et al.  Lärm- und staubarmer Fräsprozeß mit wendelförmigen Schneiden , 1993 .

[2]  C. Tanaka,et al.  On-line control of router feed speed using acoustic emission , 1996 .

[3]  Wei-Fang Chen,et al.  A comprehensive engineering model for the design, manufacture and assembly of helical carpenter shapers , 2002 .

[4]  C. Tanaka,et al.  Effects of helical angle of router bit on acoustic emission , 1998, Journal of Wood Science.

[5]  Wen-ching Su,et al.  Effect of the helix angle of router bits on chip formation and energy consumption during milling of solid wood , 2002, Journal of Wood Science.

[6]  Supasit Rodkwan,et al.  An Investigation of the Optimal Cutting Conditions in Parawood (Heavea Brasiliensis) Machining Process on a CNC Wood Router , 2006 .

[7]  R. Hernández,et al.  Characteristics of sugar maple wood surfaces produced by helical planing , 2007 .

[8]  A. Malkoçoğlu,et al.  Machining properties and surface roughness of various wood species planed in different conditions , 2007 .

[9]  R. Hernández,et al.  Toward a process monitoring and control of a CNC wood router: development of an adaptive control system for routing white birch. , 2010 .

[10]  Roland Fischer,et al.  Performance of helical edge milling cutters in planing wood , 2011, European Journal of Wood and Wood Products.

[11]  Z. Zhong,et al.  Measurement of bonding strength of pine, kapur and meranti wood species as function of their surface quality , 2013 .

[12]  Z. Zhong,et al.  Measurement of the surface roughness of wood based materials used in furniture manufacture , 2013 .

[13]  Raja Izamshah,et al.  Effects of End Mill Helix Angle on Accuracy for Machining Thin-Rib Aerospace Component , 2013 .

[14]  Tomasz Gawroński,et al.  Optimisation of CNC routing operations of wooden furniture parts , 2013 .

[15]  Sunday M. Ofochebe,et al.  Comparing up and Down Milling Modes of End-Milling Using Temporal Finite Element Analysis , 2013 .

[16]  R. Izamshah,et al.  Effects of Cutter Geometrical Features on Machining Polyetheretherketones (PEEK) Engineering Plastic , 2014 .

[17]  L. Cristovão,et al.  EFFECT OF AVERAGE CHIP THICKNESS AND CUTTING SPEED ON CUTTING FORCES AND SURFACE ROUGHNESS DURING PERIPHERAL UP MILLING OF WOOD FLOUR/POLY VINYL CHLORIDE COMPOSITE , 2015 .

[18]  J. Burek,et al.  The effect of the cutting edge helix angle of the cutter on the cutting force components and vibration acceleration amplitude , 2017 .

[19]  A. Wisitsoraat,et al.  Influence of helix angle on tool performances of TiAlN- and DLC-coated carbide end mills for dry side milling of stainless steel , 2017 .

[20]  M. Ekevad,et al.  Motion of Chips When Leaving the Cutting Zone during Chipboard Plane Milling , 2017 .