Creating Lines

Creating Lines

Objectives

  Create lines in a sketch.


Video link :- Creating Lines


Prerequisites

  In the Sketch section the Dimensional and Geometrical Constraints should be active.

         All SmartPick options must be active.


Note Use SmartPicks to increase productivity. Look at the geometric symbols that appear when constructing geometry. By reviewing these symbols, you will know if you are creating unwanted geometric constraints. Hold SHIFT to deactivate SmartPick when creating geometry. Double-click the icon to use the same command continuously.

 

Create a Line Using Coordinates

Step 1:

For this exercise you will first create a new part and a sketch within it. This sketch can then be used for the rest of the following Line exercises. Begin by creating a new 3D Part.

 

Select Position Sketch icon. Then create a sketch on the YZ plane and select OK in the Sketch Positioning dialog box.


Step 2:

Select the Line command icon.

 

Step 3:

On the Tools Pallet toolbar, enter 10 for H and 20 for V for the Start Point.



Then use the Tab Key to move between fields.

Step 4:

Once you have entered the start point, the sketch tools toolbar changes so that you can enter the End Point.



Use the TAB key and enter 60 for H and 70 for V for the endpoint. CATIA creates the line between the two points.



Note that it creates the line and adds dimensions from the sketch origin if you specify an H and V value and have Dimensional and Geometric constraint creation activated.

 

Creating a Line from Endpoints

Step 1:

Continue within the same sketch previously created. Select the Line command icon.

 

Step 2:

Create two lines that form a right angle. In the Graphics Window using the left mouse button create a horizontal line as shown below.

 

Step 3:

Next create a vertical line from the end of the previously created horizontal line as shown below.

 

Step 4:

In the Graphics Window, pick the left endpoint on the horizontal line.



Step 5:

Pick the top point of the vertical line.




CATIA creates the line between the two endpoints.

 

Creating a Line from the Midpoint of a Line

Step 1:

Use the part from the above process.  

Step 2:

Select the Line command icon.

 

Step 3:

In the Graphics Window, move the cursor over the right angled line.

Step 4:

Right-click and select Midpoint from the pop-up menu. CATIA creates the first endpoint of the line and displays a preview.

Step 5:

Pick the bottom right point.


Creating Infinite Lines

Step 1:

Continue within the same sketch previously created. Select the Infinite Line icon.

 

Step 2:

On the Sketch Tools toolbar, click either Horizontal Line, Vertical Line, or Line Through 2 Points.



Step 3:

In the Graphics Window, pick a point that the line passes through.
Or
On the Tools Pallete , enter the H and V values for a point that the line passes through and press TAB.

 

The infinite line is created.


Creating a Bi-Tangent Line

Step 1:

Continue within the same sketch previously created. Create two circles apart from each other as shown below. Select the Circle icon.

 

Click and drag with the left mouse button to create the first circle as shown in  the image below.

 

Select the Circle icon again. Click and drag with the left mouse button to create the second circle only make it slightly smaller and further away from the first circle, as shown in  the image below.

 

 

Step 2:

Select the Bi-TangentLine command.  

 

Step 3:

In the Graphics Window, pick the top side of the larger circle as the first tangent point.



Step 4:

Pick the bottom side of the smaller circle.

Notice the tangent line created between the two circles. This also works with arcs.


Creating a Bisecting Line

Step 1:

Continue within the same sketch previously created. Create two lines that intersect each other using the Line command, as shown in the image below.

 


Step 2:

 Select the Bisecting Line icon.

 

Step 3:

In the Graphics Window, pick the pick the left portion of the line shown.


Step 4:

Pick the left portion of the other line as shown.


It creates an infinite line that bisects the angle between the two lines.

 

Creating a Line Normal to a Curve

Step 1:

Continue within the same sketch previously created. Create a Spline. Select the Spline icon and with the left mouse button and place six staggered points in the graphic window as shown in the image below.



Double click the point to exit the command or click on the Spline icon again to deactivate the command.

Step 2:

Select the Line Normal to Curve icon.

 

Step 3:

In the Graphics Window, pick a point on the curve to define the first endpoint of the line.


Step 4:

Pick a point in space to define the other endpoint of the line.

Step 5:

CATIA creates the line and a Perpendicular constraint.


Step 6:

When finished with all the exercises (you do not have to save this part) simply click the Exit App to exit the sketch.


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