Краткий справочник по резанию материалов на металлообрабатывающих станках TECHNICAL DATA

Краткий справочник по резанию материалов на металлообрабатывающих станках TECHNICAL DATA

Краткий справочник по резанию материалов на металлообрабатывающих станках TECHNICAL DATA _ FORMULAE FOR DRILLING CUTTING SPEED (vc) 7T DC n , , . vc = (m/min) 1000 vc (m/min): Cutting Speed DC (mm) Drill Diameter n (3.14) Pi n (min'1) Main Axis Spindle Speed Divide by 1,000 to chi DC jnge to m from mm. (Problem) What is the cutting speed when main axis spindle speed is 1350min"1 )n and drill diameter is 12mm (Answer) Substitute 7r=3.14, DC=12, n=1350 into the formula jr DC n 3.14x12x1350 , . vc= 1000 = 1000 = 50.9m/min The cutting speed is 50.9m/min. FEED OF THE MAIN SPINDLE (vf) vf (mm/min): Feed Speed of the Main Spindle (Z axis) vf = fr-n(mm/min) fr (mm/rev) Feed per Revolution n (min'1) Main Axis Spindle Speed (Problem) What is the spindle feed (vf) when the feed per revolution is 0.2mm/rev and main axis spindle speed is 1350min'1 (Answer) Substitute fr=0.2, n=1350 into the formula vf = frxn = 0.2x1350 = 270mm/min The spindle feed is 270mm/min. DRILLING TIME (Tc) Tc (min) Drilling Time n (min'1) Spindle Speed Id (mm) Hole Depth fr (mm/rev): Feed per Revolution i Number of Holes (Problem) What is the drilling time required for drilling a 30mm length hole in alloy steel (JIS SCM440) at a cutting speed of 50m/min and a feed 0.15mm/rev 50x1000 (Answer) Spindle Speed n ; 15x3.14 = 1061.57mm-1 Tc = 30x1 = 0.188 1061.57x0.15 = 0.188 60=11.3 sec Mitsubishi Materials 2003 TECHNICAL DATA