On Mon, 2 Jul 2012 13:15:56 +0300, you wrote: >2012/6/29 Les Newell <[email protected]>: >> >> If you are mainly planning on cutting aluminum I would suggest looking >> into oil mist cooling instead of flood coolant. > >Can anyone suggest me way to obtain cutting forces? >I would like to have spindle motor on a rotary joint. Since the space >is limited, I have an idea for compact design. I have all the sizes, >offsets from rotary axis to tool tip etc. But I need to know cutting >forces to find out required motor torque for the rotary joint and also >for some construction elements. >Those forces will depend on depth material, removed in single pass, >diameter of tool, the sharpness of tool (worn-out tool will require >higher force). Probably there are other factors as well. > >Can anyone share some source of information or at least share their experience?
Google "end mill cutting forces" loads of information including this if you like math :) http://www.me.mtu.edu/~jwsuther/Publications/220_PA002.pdf My tables give me these figures - the required HP is spindle power, all the CAM programs I'm conversant with assume you have adequate axis torque. OPERATION TYPE= Roughing MATERIAL= Wrought Aluminum Alloys SURFACE SPEED= 259 MPM ENDMILL MATERIAL= CARBIDE ENDMILL DIAMETER= 0.23622 inches 6 mm LOAD PER FLUTE= 0.1397 mm NUMBER OF FLUTES= 2 SPINDLE SPEED= 13740 RPM FEEDRATE= 151.14 IPM 3838.956 mmPM MAX Radial Depth of Cut= 2.4 mm MAX Axial Depth of Cut= 5.1 mm MATERIAL REMOVAL RATE= 2.86743 in³/min MATERIAL POWER CONSTANT= 0.33 REQUIRED HORSEPOWER= 1.11324 In theory my router can exceed the above, although I've never tried it with Al. I have slot cut swamp ash at 150 ipm at 20K rpm, 5mm doc with a two flute 8mm up spiral carbide mill. That's on steppers at 72V 4.5A with 4mm pitch ball screws direct drive. Steve Blackmore -- ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
