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Cnc turning lecture6


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  • 1. 6/13/2012 AXISCNC TURNING XTRAUB TNA 300 Z sharizan/CNC Turning TNA300 1 sharizan/CNC Turning TNA300 2 TURNING Coordinate system for CNC Turning machines MILLING sharizan/CNC Turning TNA300 3 sharizan/CNC Turning TNA300 4 1
  • 2. 6/13/2012MACHINE COMMAND G InstructionsCODES G00 Straight line at the rapid traverse G code - Set preparatory machine   G01 Straight line at the feed rate functions such as rapid traverse mode,  G02 Circular arc, clockwise (right) feed mode and active tool length offsets.  G03 Circular arc, counter clockwise (left)  G26 Approach to tool changing ( Home)  G40 Tools nose off M code - Perform a miscellaneous  G46 Tools nose on machine function such as automatic tool  G59 Zero point shift  G71 Longitude roughing cycle changes, coolant control and spindle  G92 Speed limitation operations.  G96 Constant cutting speed sharizan/CNC Turning TNA300 5 sharizan/CNC Turning TNA300 6M Instructions Program Block M00 Programmed stop M03 Spindle right (clockwise) M04 Spindle left ( counterclockwise) G01 X30 Z-20 F0.2 M05 Spindle stop M08 Coolant on G-Instruction Auxiliary conditions M09 Coolant off sharizan/CNC Turning TNA300 7 sharizan/CNC Turning TNA300 8 2
  • 3. 6/13/2012Step in programming Start Start – work piece zero point, cutting speed, tool, example spindle rotation, speed limit % Facing O 4546 Roughing process G59 X 0 Z___ Cutting G96 V___ T___ M___ Close - stop spindle, stop coolant, program stop G92 S___ M08 sharizan/CNC Turning TNA300 9 sharizan/CNC Turning TNA300 10Start Startexample Symbol example% Program number %O 4546 O 4546 Zero point shiftG59 X 0 Z___ G59 X 0 Z___G96 V___ T___ M___ G96 V___ T___ M___G92 S___ M08 G92 S___ M08 sharizan/CNC Turning TNA300 11 sharizan/CNC Turning TNA300 12 3
  • 4. 6/13/2012 G59 – zero point shift Start example G59 X 0 Z___ CALCULATE Z %Machine zero point spindle length = 150mm O 4546 Workpiece zero point + Work piece length = ______ + allowance = 10mm G59 X 0 Z___ Constant cutting speed TOTAL = ______ G96 V___ T___ M___ G92 S___ M08 sharizan/CNC Turning TNA300 13 sharizan/CNC Turning TNA300 14 Start G96 V___ T___ M___ example  V ____ VELOCITY – by calculation or table % Tools O 4546 G59 X 0 Z___  T ____ No of Tools G96 V___ T___ M___ Spindle G92 S___ M08 rotation  M____ Spindle rotation ( CW / CCW ) sharizan/CNC Turning TNA300 15 sharizan/CNC Turning TNA300 16 4
  • 5. 6/13/2012Start G92 S____M__example  S2000 SPEED LIMIT – calculation or table% Speed limitO 4546G59 X 0 Z___  M08 Coolant onG96 V___ T___ M___G92 S___ M08 Coolant on sharizan/CNC Turning TNA300 17 sharizan/CNC Turning TNA300 18CLOSE PROGRAMMING TECHNIQUEexample Using G codeG26 Approach to tools changing (home)M05 M09 Spindle stop/Coolant offM00 Program stop% sharizan/CNC Turning TNA300 19 sharizan/CNC Turning TNA300 20 5
  • 6. 6/13/2012PROGRAMMING TECHNIQUE PROGRAMMING TECHNIQUE G0 X20 Z2 G1 X20 Z-15 F0.2 F - federate G2 X40 Z-25 R10 G1 X40 Z-40 G3 X60 Z-50 R10 G1 X60 Z-75 X = Diameter of work piece sharizan/CNC Turning TNA300 21 sharizan/CNC Turning TNA300 22EXAMPLE 1 EXAMPLE 1- solution % O 652 X G59 X0 Z180 START G96 V200 T0202 M03 G92 S2000 M08 G00 X32 Z0 FACING G01 X-1 Z0 F0.2 G00 X26 Z2 G01 X26 Z-20 G00 X27 Z-20 Ø30 G00 X27 Z2 G00 X22 Z2 ROUGHING G01 X22 Z-20 G00 X23 Z-20 Ø19 G00 X23 Z2 Z G00 X19 Z2 G01 X19 Z-20 G00 X32 Z-20 15 20 G26 M5 M9 CLOSE M0 Unit : mm % sharizan/CNC Turning TNA300 23 sharizan/CNC Turning TNA300 24 6
  • 7. 6/13/2012EXAMPLE 2 - CUT EXAMPLE 2- solution % O 652 G96 V200 T0101 M04 X G59 X0 Z190 START G92 S2000 M08 G96 V200 T0202 M03 G00 X32 Z-36.5 G92 S2000 M08 G01 X26 G00 X32 Z0 G00 X27 FACING G01 X22 G01 X-1 Z0 F0.2 G00 X26 Z2 G00 X23 G01 X18 CUT G01 X26 Z-20 G00 X27 Z-20 G00 X19 Ø30 G01 X14 G00 X27 Z2 G00 X22 Z2 G00 X15 ROUGHING G01 X22 Z-20 G01 X10 G00 X23 Z-20 G00 X11 Ø19 G00 X23 Z2 G01 X6 G00 X19 Z2 G00 X7 Z G01 X2 G01 X19 Z-20 G00 X32 Z-20 G00 X3 15 20 G01 X0 G26 G26 M5 M9 CLOSE Unit : mm M0 % sharizan/CNC Turning TNA300 25 sharizan/CNC Turning TNA300 26EXAMPLE 3 Using G71- Longitude roughing cycle Unit : mm X G71 P60 Q70 I0.2 K0.2 D2 F0.2 Ø35 Machining Machining allowance in Feedrate allowance in Ø30 Z-direction X-direction Depth of cut Ø22 Z Definition of finished 20 15 15 contour sharizan/CNC Turning TNA300 27 sharizan/CNC Turning TNA300 28 7
  • 8. 6/13/2012G71 EXAMPLE 3 - solution START PROGRAMMED % END PROGRAMMED X 0 5451 G59 X0 Z190 G26 Roughing cuts M05 M09 G96 V200 T0202 M03 M00 G92 S2000 M08 % End point finished FACING OBJECT contour “Q” Start point G00 X37 Z0 G01 X-1 Z0 F0.2 G00 X37 Z2 ROUGHING CYCLE K G71 P60 Q70 I0.02 K0.02 D1 F0.2 G26 SUB PROGRAMMED D N60 G46 G00 X0 Z0 G01 X22 Z0 G01 X22 Z-15 G01 X30 Z-15 Start point finished G01 X30 Z-30 contour “P” G01 X35 Z-30 I G40 N70 G26 Z sharizan/CNC Turning TNA300 29 sharizan/CNC Turning TNA300 30EXAMPLE 4 EXAMPLE 4 - solution % O55 G00 X11 G59 X0 Z210 G01 X6 G96 V200 T0202 M03 G00 X7 G92 S2000 M08 G01 X2 G00 X20 Z0 G00 X3 G01 X-1 Z0 F0.2 G01 X0 G00 X20 Z0 G26 G71 P80 Q90 I0.2 K0.2 D2 F0.2 M5 M9 G26 M0 N80 % G46 G00 X0 Z0 G01 X4 Z0 G01 X4 Z-15 G02 X8 Z-20 R10 G01 X8 Z-35 G03 X-18 Z-45 R15 G01 X-18 Z-50 G40 N90 G26 G96 V200 T0101 M04 G92 S2000 M08 G00 X20 Z-51.5 G01 X14 G00 X15 G01 X10 sharizan/CNC Turning TNA300 31 sharizan/CNC Turning TNA300 32 8
  • 9. 6/13/2012 DATA REQUIRED - bulb EXAMPLE 5- bulb Program Number : O041 Cutting Rough part : Feed 0.5 mm/rev Diameter = 19mm Cont cutting rate 400mm/min Length = 49mm Working Zero Point G59 Tools Chuck + jaw = 150mm Facing = T0202 + rough part = 49mm Roughing = T0202 + clearance = 10mm Cutting = T0101 Zero point shift = 209mm Metal working data Facing Feed 0.4 mm/rev Speed 2000rpm Cont cutting rate 200mm/min Roughing Feed 0.2 mm/rev Cont cutting rate 200mm/min sharizan/CNC Turning TNA300 33 sharizan/CNC Turning TNA300 34% EXAMPLE 5 - solution EXERCISE 1O041 G00 X21 Z-50.5G59 X0 Z209 G01 X15 F0.5G96 V200 T0202 M03 G00 X16G92 S2000 M08 G01 X11G00 X21 Z0 G00 X12G01 X-1 Z0 F0.4 G01 X7G00 X21 Z2 G00 X8G71 P70 Q80 I0.2 K0.2 D1 F0.2 G01 X3G26 G00 X4N70 G01 X0G46 G26G00 X0 Z0 M05 M09G03 X3 Z-1 R2 M00G03 X19 Z-25 R38 %G03 X10 Z-35 R13.555G01 X10 Z-45G03 X8 Z-49 R6.9G00 X12 Z-38G01 X9 Z-38 G00 X12 Z-38G00 X12 Z-41G01 X9 Z-41G00 X12 Z-41G00 X12 Z-44G01 X9 Z-44G40N80G26G96 V200 T0101 M04G92 S2000 sharizan/CNC Turning TNA300 35 sharizan/CNC Turning TNA300 36 9
  • 10. 6/13/2012EXERCISE 2 EXERCISE 1 EXERCISE 3 sharizan/CNC Turning TNA300 37 sharizan/CNC Turning TNA300 38 10