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• Interchange of Heat in Saw Disc Body During Cutting

  488-494

  Jan Svoren

  Lubomir Javorek

  Lubomir Nascák

  Views:

  125

  The paper presents the experimental results of a research aimed at the distribution of the temperature on the circular saw blade body. The temperature was measured at two distances from the centre of the circular saw blade body (70 mm, 140 mm) by means of an infrared thermometer. Two circular saw blades with the diameter of 350 mm and a variable adjustment of the body (with slots and without the coating, with both slots and coating) were used for the longitudinal sawing of the spruce wood (Picea excelsa) with the thickness of h = 37 mm. Feed speeds ware vf1 = 14 mpm, vf2 = 17 mpm and vf3 = 20 mpm. Cutting revolutions n = 4100 /min. were constant. The measured temperature was in the range from 21 °C till 27 °C. The highest measured temperatures were recorded on the circular saw blade with the slots and coating.

• Design of Experiments Application for Machining Process Analyse

  257-265

  Lubomir Javorek

  Maria Vargovská

  Views:

  139

  In this contribution are results from machining of the aluminium alloy by spiral router. The experiment was designed as full 3 - factors and 2-levels process and for evaluation of input factors to output parameters – Fx and Fy components were used Paret´s diagram and Lorentz´s line. The input parameters were: revolution speed (4000/min. and 6000/min.), working engagement of a cutting edge (depth of cut) a_e (1 mm and 3 mm), back engagement of a cutting edge (with  of cut) a_p (5 mm and 15 mm) and down (climb) milling.

• Dependence of the Passive Force Fp From the Revolutions, back Engagement of Cutting Edge Ae, Working Engagement of the Cutting Edge Ap During Milling

  72-79

  Lubomir Javorek

  Views:

  188

  In this contribution is analysed the force component of final force (passive force) by peripheral milling operation. Therefore, the main parameters that had influence to independent variable were revolutions, back engagement of a cutting edge ae, working engagement of the cutting edge ap. The article deals with the issue of milling in material AlMgSi0.5 (aluminium alloy). Specifically evaluates the force component with respect to change of revolutions (4000/min., 5000/min., 6000/min.), working engagement of the cutting edge ap (1 mm, 2 mm, 3 mm) and back engagement of a cutting edge ae (5 mm, 10 mm, 15 mm). The Alfaflex process fluid with 7% concentration was supplied in an amount of about cca 10 l/min.

• The Measurement of The Three Components of The Cutting Force During The Turning Process

  139-146

  Csaba Nemes

  Lubomir Javorek

  Sándor Bodzás

  Sándor Pálinkás

  Views:

  118

  We carried out the measurement of the three components of the cutting force as a function of the modification of the depth of cut during the longitudinal turning process. The results show that if we increase the depth of cut, all three components of the cutting force shows increasing tendency, regardless of how much the cutting speed and feed speed were performed during the measurements [1] [2] [3] [4].