Fiberboard is used extensively in furniture production in all over the world. One of the most important reasons for the preference of fiberboard is the easy shaping of its surfaces. In the past, the surfaces of the fiberboard were processed using conventional machines. Nowadays, Computer Numerical Control (CNC) machines are used in the processing of the fiberboard. CNC machines is operated using some computer control commands which provide the action of the machine. The code file consisting of these commands contains some adjustments such as step over, spindle speed, feed rate, finish depth, machining strategy, step down, plunge rate etc. These adjustments change the surface roughness of the processed section of fiberboard. In this study, the influence of finish depth (2 and 6 mm), step over (40%, 60% and 80%) and feed rate (3, 5 and 7 m/min) settings on the surface roughness of fiberboard were investigated. Ra roughness value of processed section of fiberboard test samples was determined using contact stylus method. According to the obtained data, it was concluded that the surface roughness increased as finish depth, feed rate and step over are increased.

Aim of study: The aim of this study was to determine the effects of cutter parameters on the energy consumption of CNC machine, and surface roughness of medium density fiberboard (MDF). Material and methods: Experiments were conducted using a three-axis CNC router. The energy consumption and surface roughness values were measured using a wattmeter (TT-Technic PM 001) and roughness tester (Mitutoyo SJ 210), respectively. The values of the Ra, Rq, and Rz roughness parameters, and energy consumption were determined. Main results: The surface roughness increased with increases in the step over and feed rate, whereas the energy consumption decreased. In addition, the energy consumption increased when a high spindle speed was used. When the spindle speed is increased from 8000 rpm to 16000 rpm, the energy consumption increases by 154%. When the stepover is increased from 20% to 60%, energy consumption is reduced by 63%. When the feed rate is increased from 3 m/min to 7 m/min, the energy consumption is reduced by 60%. Highlights: The energy consumption increased as the step over and feed rate decreased. The energy consumption increased as the spindle speed increased. The surface roughness increased with the step over and feed rate

Solid wood and wood-based composite panels are used to produce different types of furniture. In the connection points of furniture, some different types of fasteners, such as screws, minifix, and dowels, are used to assemble the parts of the furniture. Melamine-faced fiber board (MF-FB) and melamine faced particle board (MF-PB) are used extensively in the production of furniture. In this study, we determined the screw withdrawal strength and screw head pullthrough of MF-FB and MF-PB. Tests were conducted on the surfaces and edges according to ASTM D1037-12. The data that were obtained indicated that the screw holding capacity of MF-PB was greater than that of MF-FB. Also, the screw holding capacity was greater on the surfaces of both MF-PB and MF-FB than it was on the edges. In addition, screw head pull-through was greater than that of direct screw withdrawal in both MF-PB and MF-FB.

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