Basic Turning

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CAD/CAM

SEMESTER 2 SESI 2009/2010

LAB ACTIVITY 8 - Turning Operation

1.0 Learning Outcomes

At the end of this assignment, students should be able to;

1. Create a Rough Turning Operation

2. Replay the Toolpath

3. Create a Groove Turning Operation

4.

Create Profile Finish Turning Operation5. Generate NC Code.

2.0 Duration: 4 hours

3.0 Exercise

UNIVERSITI TEKNIKAL MALAYSIA MELAKA

FAKULTI KEJURUTERAAN PEMBUATAN


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Open the Part to Machine

This first task shows you how to open a part, enter the Lathe Machining workbench and makemodifications to the Part Operation.

1.Select File > Open then select the Lathe01.CATPart document.

2.Select Machining > Lathe Machining from the Start menu.

The Lathe Machining workbench appears. The part is displayed in the Setup Editor window athe manufacturing specification tree.

3.Double click Part Operation.1 in the tree to display the Part Operation dialog box.

4.Click the Machine icon. The Machine Editor dialog box appears.

Select the Horizontal Lathe Machine icon.

Set the spindle axis to Z and the radial axis to X.

Click OK.

Setting the spindle axis to Z defines the C-axis (that is, rotary motion about the Z-axis). Thicreation of indexed machine rotations for milling and drilling operations.

5.

Set the tool change point in the Position tab page as shown below.


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6.Click OK to confirm your modifications to the Part Operation.

7.Select Manufacturing Program.1 in the tree to make it the current entity.

To insert program entities such as machining operations, tools and auxiliary commands you

make the program current before clicking the insert program entitycommand

click the insert program entitycommand then make the program current.


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Open the Part to Machine

This first task shows you how to open a part, enter the Lathe Machining workbench and makemodifications to the Part Operation.

1.Select File > Open then select the Lathe01.CATPart document.

2.Select Machining > Lathe Machining from the Start menu.

The Lathe Machining workbench appears. The part is displayed in the Setup Editor window athe manufacturing specification tree.

3.Double click Part Operation.1 in the tree to display the Part Operation dialog box.

4.Click the Machine icon. The Machine Editor dialog box appears.

Select the Horizontal Lathe Machine icon.

Set the spindle axis to Z and the radial axis to X.

Click OK.

Setting the spindle axis to Z defines the C-axis (that is, rotary motion about the Z-axis). Thicreation of indexed machine rotations for milling and drilling operations.

5.

Set the tool change point in the Position tab page as shown below.


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6.Click OK to confirm your modifications to the Part Operation.

7.Select Manufacturing Program.1 in the tree to make it the current entity.

To insert program entities such as machining operations, tools and auxiliary commands you

make the program current before clicking the insert program entitycommand

click the insert program entitycommand then make the program current.


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Create a Rough Turning Operation

This task shows you how to create a Longitudinal Rough Turning operation for machining partof the workpiece.

This operation will use the tool proposed by the program, so you just need to specify the

geometry to be machined and set some of the machining parameters.1. Select the Rough Turning icon .

A Rough Turning.1 entity along with a default tool is added to the program.

The Rough Turning dialog box appears directly at the Geometry tab page .

2. Click the red Stock areain the icon, then selectthe stock profile asshown.

Click OK in the Edge

Selection toolbar to endyour selection.

3. Click the red Part areain the icon, then selectthe part profile asshown.

Click OK in the EdgeSelection toolbar to endyour selection.

4. Select the Strategy tabpage and set the

parameters as shown.

5. Click OK to create the operation.


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Replay the Tool Path

This task shows you how to replay the tool path of the Roughing operation.

1.Select theRoughing

operation inthe treethenselect theReplay ToolPath icon

.

The Replaydialog boxappears.

2.Choose theContinuousreplay modeby means ofthe dropdown icon

.

3.Click the button to position the tool at the start point of the operation.

4.Click the button to start the replay. The tool moves along the computed trajectory.

5.Click OK to quit the replay mode.


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Create a Groove Turning Operation

This task shows you how to create a Groove Turning operation to machine part of theworkpiece.

You will specify the geometry to be machined, set some of the machining parameters and

select a new tool.Make sure that the Rough Turning operation is the current entity in the program.

1.Select the Groove Turning icon .

The Groove Turning dialog box appears directly at the Geometry page .

2. Click the red Stock area in the icon, then select the stock profile as shown.

3. Click the red Part area in the icon, then select the groove profile as shown.

4. Select the Strategy tab page and check machining parameters. Set the Gouging

Safety Angle to 10 degrees.

5.Select the Tool tab in the Tooling tab page .

Enter a name of the new tool (for example, Grooving Tool).

Double click the l2 (shank length 2) parameter in the icon, then enter 60mm in the EditParameter dialog box.

Set the Max cutting depth Technology parameter to 80mm.

6. Click Replay in the dialog box to visually check the operation's tool path.


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Click OK to exit the replay mode and return to the Groove Turning dialog box.

7. Click OK to create the operation.


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Generate NC Code

This task shows you how to generate NC code from the program. An APT source file will begenerated in this example.

Before doing this task, double click the Part Operation entity in the tree and, in the dialog box

that appears, click the Machine icon to access the Machine Editor dialog box. Make sure thatyou have selected a Horizontal lathe machine and that the desired NC data format is set toAxis (X, Y, Z).

1. Use the right mouse key on the Manufacturing Program.1 entity in the tree to selectGenerate NC Code Interactively. The Generate NC Output Interactively dialog boxappears.

2. Select APT as the desired NC data type.

3. Click the Output File button to select the folder where you want the file to be saved andspecify the name of the file.


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4. Click Execute to generate the APT source file.

An extract from a typical APT source file is given below.

$$ -----------------------------------------------------------------$$ Generated on Wednesday, April 07, 2004 11:16:08 AM$$ CATIA APT VERSION 1.0$$ -----------------------------------------------------------------

$$ Manufacturing Program.1$$ Part Operation.1$$*CATIA0$$ Manufacturing Program.1$$ 1.00000 0.00000 0.00000 0.00000$$ 0.00000 1.00000 0.00000 0.00000$$ 0.00000 0.00000 1.00000 0.00000PARTNO Part Operation.1$$ OPERATION NAME : Turning Tool Change.1$$ Start generation of : Turning Tool Change.1$$ TOOLCHANGEBEGINNINGCUTTER/ 10.000000

TOOLNO/1,TURN,1,0,9, 5.000000,$0.000000, 0.000000, 0.400000,MMPR, 70.000000,RPM,$CCLW,ON, 0.000000,NOTETPRINT/T1 External Insert-Holder,T1 External Insert-Holder,Turning Tool$Assembly.1LOADTL/1,1,1$$ TOOLCHANGEEND$$ End of generation of : Turning Tool Change.1$$ OPERATION NAME : Rough Turning.1$$ Start generation of : Rough Turning.1SWITCH/9FEDRAT/ 0.3000,MMPRSPINDL/ 70.0000,RPM,CCLW

GOTO / 107.08333, 0.00000, 257.00000GOTO / 107.08333, 0.00000, 255.00000...FEDRAT/ 0.8000,MMPRGOTO / 40.21213, 0.00000, 150.21213$$ End of generation of : Rough Turning.1$$ OPERATION NAME : Turning Tool Change.2$$ Start generation of : Turning Tool Change.2$$ TOOLCHANGEBEGINNINGCUTTER/ 2.400000TOOLNO/1,TURN,1,0,9, 1.200000,$0.000000, 0.000000, 0.400000,MMPR, 70.000000,RPM,$

CCLW,ON,,NOTETPRINT/T3 External Groove Insert-Holder,T3 External Groove Insert-Holde$r,Turning Tool Assembly.1_1LOADTL/1,1,1$$ TOOLCHANGEEND$$ End of generation of : Turning Tool Change.2$$ OPERATION NAME : Groove Turning.1$$ Start generation of : Groove Turning.1SWITCH/9FEDRAT/ 0.3000,MMPRSPINDL/ 70.0000,RPM,CCLW


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GOTO / 108.20000, 0.00000, 96.70000GOTO / 106.20000, 0.00000, 96.70000...RAPIDGOTO / 108.20000, 0.00000, 57.91213$$ End of generation of : Groove Turning.1$$ OPERATION NAME : Turning Tool Change.3$$ Start generation of : Turning Tool Change.3$$ TOOLCHANGEBEGINNINGCUTTER/ 10.000000TOOLNO/1,TURN,1,0,9, 5.000000,$0.000000, 0.000000, 0.400000,MMPR, 70.000000,RPM,$CCLW,ON, 0.000000,NOTETPRINT/T1 External Insert-Holder,T1 External Insert-Holder,Turning Tool$Assembly.1LOADTL/1,1,1$$ TOOLCHANGEEND$$ End of generation of : Turning Tool Change.3$$ OPERATION NAME : Profile Finish Turning.1$$ Start generation of : Profile Finish Turning.1

SWITCH/9FEDRAT/ 0.3000,MMPRSPINDL/ 70.0000,RPM,CCLWGOTO / -2.00000, 0.00000, 225.00000GOTO / 0.00000, 0.00000, 225.00000...GOTO / 40.00000, 0.00000, 145.00000FEDRAT/ 0.8000,MMPRGOTO / 40.21213, 0.00000, 144.78787$$ End of generation of : Profile Finish Turning.1FINI

Basic Turning

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