Learn how to combine 2D sketching tools to form more complex shapes
Learn how to edit sketches
Introduction
This chapter introduces most of the tools found on the Sketch panel—that is, those tools found under the Sketch tab. Inventor 3D models are usually based on an initial 2D sketch that is extended and manipulated to create a final 3D solid model.
Each tool is presented with a short sample application to introduce the tool and show how it can be used.
The Sketch Panel
To Access the Sketch Panel
Click the New tool.
The Create New File dialog box will appear. See Figure 2-1.
Figure 2-1
Click the Metric tab.
Scroll down and click the Standard (mm).ipt format.
Click Create.
Click the Start 2D Sketch tool on the Sketch panel.
In this example, the XY plane was selected. The one-color grid background is optional. It is included in this chapter for visual referencing and to make it easier to see the figures on the screen.
To Add a Grid Background
Click the Tools tab and select the Application Options tool on the Options panel.
Click the Sketch tab and turn on the Grid lines option under the Display heading.
A checkmark in the box next to the Grid lines heading indicates that the Grid lines option is on.
Click the Tools tab and select the Application Options tool.
The Application Options dialog box will appear.
Click the Colors tab, click the arrowhead to the right of the Gradient option located under the Background heading, and select the 1 Color option.
Line
The Line tool is used to draw individual straight lines. See Figure 2-3.
Click the Line tool located on the Create panel under the Sketch tab.
Select a point on the drawing screen, click and release the left mouse button, and drag the cursor across the screen.
Select an endpoint for the line and again click and release the left mouse button.
As the line is being sketched, a box with a dark background will appear above the line, defining the length of the line in real time. Another box, with a light background, will also appear, giving the angle of the line relative to the horizontal.
Note
0° is defined as a horizontal line to the right of the starting point.
Continue the line by moving the cursor.
A distance and an angle value will again appear. These values refer to the new starting point. The new starting point will be the same as the endpoint of the horizontal line, but the values that are displayed will be based on the new starting point.
Select an endpoint and click the left mouse button.
Right-click the mouse and click the OK option.
This will end the Line sequence.
Note
The <Esc> key can also be used to end a command sequence.
Start a new line by clicking the Line tool and moving the cursor to the endpoint of the second line.
A colored, filled circle will appear on the endpoint when it is selected.
Click the point and drag the cursor to the original starting point of the horizontal line.
Click the point, right-click the mouse, and select the OK option.
To Define the Lengths of the Lines
Figure 2-3 shows an enclosed figure. It was sketched; that is, the lengths and angles of the lines were estimated. The lengths of the lines will now be defined.
Click the Dimension tool located on the Constrain panel under the Sketch tab.
Click the horizontal line, move the cursor away from the line, and click a location point.
The Edit Dimension value box will appear. See Figure 2-4.
Figure 2-4
Enter a value for the dimension and click the green checkmark.
In this example, 25 was entered.
Click the Dimension tool, then click the horizontal line and the intersection point between the two slanted lines, and move the cursor to the right.
A horizontal or a vertical line will appear.
Undo the horizontal dimension. Click the Dimension tool, click the right slanted line, and move the cursor away from the line.
An aligned dimension will appear with the Edit Dimension value box.
Enter a value into the Edit Dimension value box.
In this example, a value of 18 was entered.
Click the green checkmark.
Click the Dimension tool, click the horizontal line and the right slanted line, and move the cursor up and to the right.
An angular dimension will appear.
Enter an angular value; click the green checkmark.
Chapter 7 will explain when to use the different types of dimensions to define a drawing.
The object is now completely defined; that is, no more dimensions are needed. If you try to dimension the left slanted line, an error message will appear. See Figure 2-5. If you wished to dimension the length of the left slanted line, you would have to remove one of the other dimensions.
Figure 2-5
Circle
There are two ways to draw circles in Inventor: by using the Circle Center Point tool or the Circle Tangent tool.
To Draw a Circle with Circle Center Point
Start a new drawing, click the English tab, click the Standard (in).ipt format, and click Create. Select the Start 2D Sketch option, and select the XY plane for the sketch.
Click the Circle tool located on the Create panel under the Sketch tab.
Select a center point and click the left mouse button.
Release the mouse button and drag the cursor away from the center point.
Select a diameter point and click the left mouse button.
In this example, a value of 5.00 was selected. The center point for a circle may also be located in association with other features.
To Draw a Circle with Its Center Point on the Midpoint of a Line
Click the Circle tool and move the cursor to the existing line.
Move the cursor up and down the line to locate the line’s midpoint.
When the line’s midpoint is located and touched, a colored, filled circle will appear.
Click the line’s midpoint, release the cursor, and draw the cursor away from the point, creating a circle.
Click a point to define the circle’s diameter.
Use the Dimension tool to size the circle.
Figure 2-6 also shows a circle created with its center point on the endpoint of a line.
To Draw a Circle Using the Circle Tangent Tool
Start a new drawing, click the Metric tab, click the Standard (mm).ipt format, and click Create. Select the Start 2D Sketch option, and select the XY plane for the sketch.
The Circle Tangent tool is a flyout from the Circle tool.
Click the left edge line, click the right edge line, and click the bottom edge line.
A circle will appear tangent to the three lines.
Arc
There are three types of arcs: three-point, tangent, and center point.
To Draw a Three-Point Arc
Start a new drawing, click the Metric tab, click the Standard (mm).ipt format, and click Create. Select the Start 2D Sketch option, and select the XY plane for the sketch.
Click the Three Point Arc tool located on the Create panel under the Sketch tab.
Select a starting point for the arc.
Select a second point.
Select the third point.
Right-click the mouse and select the OK option.
Note
Arcs are sometimes difficult to control. The Dimension and Trim tools can be used to edit an arc after it has been sketched.
To Draw a Tangent Arc
A tangent arc requires another entity to be present. In this example, a line is first drawn on the screen.
Start a new drawing, click the Metric tab, click the Standard (mm).ipt format, and click Create. Select the Start 2D Sketch option, and select the XY plane for the sketch.
The line’s endpoint will automatically be selected as long as the line is clicked near the endpoint.
Click a second point for the arc.
Right-click the mouse and select the OK option.
To Draw a Center Point Arc
Start a new drawing, click the Metric tab, click the Standard (mm).ipt format, and click Create. Select the Start 2D Sketch option, and select the XY plane for the sketch.
Select a starting point for the arc, drag the cursor away from the point, and select a second arc point.
Drag the cursor and select a third arc point.
Right-click the mouse and select the Done option.
Spline
A spline is a curved line that is defined by a series of vertices. A spline that forms an enclosed area is called a closed spline. A spline that does not form an enclosed area is called an open spline.
Start a new drawing, click the Metric tab, click the Standard (mm).ipt format, and click Create. Select the Start 2D Sketch option, and select the XY plane for the sketch.
Click the Spline tool located on the Create panel under the Sketch tab. The Spline tool is a flyout from the Line tool.
Select a starting point for the spline, select additional points, and select an endpoint.
Right-click the mouse and select the OK option.
To Edit an Existing Spline
To edit a spline, click and hold one of the vertices and drag it to a new location. See Figure 2-12. Dimensions may also be used to define and edit a spline. Figure 2-13 shows a dimensioned spline. The dimensions locating the second point, 15 and 6, were changed to 10 and 8. Note the difference in shape. Figure 2-14 shows an example of a closed spline.
Figure 2-12
Figure 2-13
Figure 2-14
Ellipse
An elliptical shape is defined in one of two ways: by a major and a minor axis, or by a diameter and an angle. Inventor defines an ellipse using a major and a minor axis.
To Draw an Ellipse
Start a new drawing, click the English tab, click the Standard (in).ipt format, and click Create. Select the Start 2D Sketch option, and select the XY plane for the sketch.
Click the Ellipse tool located on the Create panel under the Sketch tab.
See Figure 2-15. The Ellipse tool is a flyout from the Circle tool.
Figure 2-15
Select a starting point, click and release the left mouse button, drag the cursor away from the point, and select an endpoint.
The starting point will be the center point of the ellipse. As you drag the cursor, lines will develop in both the left and right directions.
Drag the cursor away from the line and click another point.
This point will define either the major or the minor axis, depending on which axis is greater.
An elliptical shape can be drawn to specific dimensions. See Figure 2-16.
Figure 2-16
Define and dimension a framework. Use the Ellipse tool and define an ellipse based on the intersections of the framework. Use the Delete tool to remove the unwanted framework.
Point
The Point tool is used to locate points on a sketch. Points are helpful in defining points for a spline, among other uses. Figure 2-17 shows dimensioned points that are then used to define a spline shape.
Figure 2-17
To Create a Point
Click the Point tool located on the Create panel under the Sketch tab.
Move the cursor to a location and click the left mouse button.
A point will be created at that location. Points can be dimensioned from other drawn features.
Rectangle
There are four ways to draw a rectangle: using either two points or three points from either a corner or a center point.
To Draw a Two-Point Rectangle
Start a new drawing, click the English tab, click the Standard (in).ipt format, and click Create. Select the Start 2D Sketch option, and select the XY plane for the sketch.
Click the Two-Point Rectangle tool, select a starting point, drag the cursor to a second point, and click the left mouse button.
Right-click the mouse and select the OK option.
The two points used to define the rectangle are the diagonally opposed corner points of the rectangle. See Figure 2-18.
Figure 2-18
To Draw a Three-Point Rectangle
Start a new drawing, click the English tab, click the Standard (in).ipt format, and click Create. Select the Start 2D Sketch option, and select the XY plane for the sketch.
Click the Three-Point Rectangle tool, select a starting point, and move the cursor to a second point.
The first two points define the length of one edge of the rectangle. See Figure 2-19.
Figure 2-19
Move the cursor to define a third point.
The distance between the second and third points defines the other edge of the rectangle.
Right-click the mouse and select the OK option.
Fillet
A fillet is a rounded corner and can be created in either the 2D sketch mode or the 3D model mode. This section presents the 2D commands.
Start a new drawing, click the Metric tab, click the Standard (mm).ipt format, and click Create. Select the Start 2D Sketch option, and select the XY plane for the sketch.
Draw a rectangle.
Click the Fillet tool located on the Create panel under the Sketch tab.
The 2D Fillet dialog box will appear. See Figure 2-20.
Figure 2-20
Define the radius of the fillet.
In this example, a radius value of 4 mm was entered.
Click two intersecting lines.
In this example, the left vertical line and the top horizontal line were selected.
Fillet the other corners of the rectangle.
Right-click the mouse and click the OK option.
Chamfer
Chamfers are straight-line cuts across corners. They are similar to fillets, but fillets are round, and chamfers are straight.
Figure 2-21 shows the 2D Chamfer dialog box. There are three different ways to define a chamfer: using two equal distances, two unequal distances, or using a distance and an angle.
Figure 2-21
To Draw Chamfers
Start a new drawing, click the Metric tab, click the Standard (in).ipt format, and click Create. Select the Start 2D Sketch option, and select the XY plane for the sketch.
Click the Chamfer tool located on the Create panel under the Sketch tab.
The Chamfer tool is a flyout from the Fillet tool.
Click the Equal distances option and enter a value of 5.
Click the left vertical line, then click the top horizontal line.
Click the Unequal distances option.
Enter 8 for Distance1 and 3 for Distance2.
Click the left vertical line and the bottom horizontal line.
Click the Distance and angle option.
Enter a Distance value of 10 and an Angle value of 45.
Click the top horizontal line and the right vertical line.
Chamfer callouts for drawings are written as follows:
Equal distances: 10 × 10 CHAMFER
Unequal distances: 5 × 10 CHAMFER
Distance and an angle: 10 × 45° CHAMFER
Polygon
A polygon is an enclosed figure that has three or more straight-line sides. If all the sides are equal, it is called an equilateral polygon. Inventor’s Polygon tool can be used to draw only equilateral polygons. Irregular polygons are created using individual lines.
An enclosed figure that has three or more straight-line sides
To Draw a Hexagon
The hexagon shape is commonly used for screw heads and nuts. See Figure 2-23.
Figure 2-23
Start a new drawing, click the English tab, click the Standard (in).ipt format, and click Create. Select the Start 2D Sketch option, and select the XY plane for the sketch.
Click the Polygon tool located on the Create panel under the Sketch tab.
The Polygon dialog box will appear. The Polygon tool is a flyout from the Rectangle tool.
Define the required number of sides.
Select a center point.
Move the cursor away from the center point and define a corner point.
Right-click the mouse and click OK.
Use the Dimension tool to define the hexagon’s size.
To Define a Hexagon’s Size
There are three different dimensions that can be used: the distance across the flats, the distance across the corners, and the edge distance. Each of these distances is defined in Figure 2-24.
Figure 2-24
Text
The Text tool is used to add text to a sketch. See Figure 2-25.
Figure 2-25
Start a new drawing, click the English tab, click the Standard (in).ipt format, and click Create. Select the Start 2D Sketch option, and select the XY plane for the sketch.
Click the Text tool located on the Create panel under the Sketch tab.
Click the drawing screen.
The Format Text dialog box will appear.
Type text in the open box as shown.
Click OK.
Note that the text was created using Tahoma font at a height of 0.120 inch.
To Change Font and Text Height
Start a new line of text by clicking the Text tool.
Change the Font to Times New Roman and the Size to 0.375 in.
Type in a new line of text.
Click OK.
Note the difference between the two lines of text.
Geometry Text
The Geometry Text tool is used to write text on a curved line.
The Geometry Text tool is a flyout from the Text tool.
Click the arc.
The Geometry Text dialog box will appear.
Type in some text.
Click OK.
Dimension
The Dimension tool is used to add size to a sketch. Dimensions will be covered in detail in Chapter 7. This section will show how to create an aligned dimension. Aligned dimensions will be needed for some constructions before Chapter 7.
To Create an Aligned Dimension
Figure 2-27 shows a shape that includes a slanted edge.
Figure 2-27
Click the Dimension tool located on the Constrain panel under the Sketch tab.
Click the slanted line and move the cursor away from the line.
A vertical dimension will appear.
Right-click the mouse and select the Aligned option.
The vertical dimension will change to an aligned dimension.
Click the mouse and change the dimension value.
Constraints
The tools on the Constrain panel are used to orient and limit entities on a sketch. Twelve different constraints are available: Coincident, Colinear, Concentric, Fix, Parallel, Perpendicular, Horizontal, Vertical, Tangent, Smooth, Symmetric, and Equal. See Figure 2-28.
Figure 2-28
Pattern—Rectangular
The Rectangular tool is used to create rectangular patterns. See Figure 2-29.
Figure 2-29
To Create a Rectangular Pattern
Start a new drawing, click the Metric tab, click the Standard (mm).ipt format, and click Create. Select the Start 2D Sketch option, and select the XY plane for the sketch.
Draw a 10 × 15 rectangle.
Click the Rectangular tool located on the Pattern panel under the Sketch tab.
The Rectangular Pattern dialog box will appear. The Geometry box will automatically turn on; that is, the program will ask which entity you wish to pattern.
Window the 10 × 15 rectangle. (Click all lines in the rectangle.)
Click on the arrow under the Direction 1 heading.
Click the top horizontal line of the rectangle.
Note
Use the Flip tool located next to the arrow under the Direction 1 heading if the preview indicates that the pattern is going in the wrong direction.
Click the arrow under the Direction 2 heading and click the left vertical line of the 10 × 15 rectangle.
In this example, the rectangles are spaced 20 mm apart. There are three rows of four rectangles.
Click OK.
Pattern—Circular
The Circular tool is used to create circular patterns, sometimes called bolt circles.
Start a new drawing, click the Metric tab, click the Standard (mm).ipt format, and click Create. Select the Start 2D Sketch option, and select the XY plane for the sketch.
Click the Circular tool located on the Pattern panel under the Sketch tab.
The Circular Pattern dialog box will appear. The Geometry box will automatically turn on; that is, the program will ask which entity you wish to pattern.
Click the circle.
Click the arrow to the left of the Axis heading.
Select the point.
A preview will appear.
Click OK.
Pattern—Mirror
The Mirror tool is used to create mirror images of an entity. Remember, a mirror image is not the same as a copy. Your hands are approximate mirror images of each other. Figure 2-31 shows an image to be mirrored. The figure also shows a copy of the image. Note the difference between the copy and the mirror image.
Figure 2-31
Start a new drawing, click the Metric tab, click the Standard (mm).ipt format, and click Create. Select the Start 2D Sketch option, and select the XY plane for the sketch.
Click the Mirror tool located on the Pattern panel under the Sketch tab.
The Mirror dialog box will appear.
Click the Select box (the box may be on automatically).
Click each line in the shape.
Click the Mirror line box in the Mirror dialog box.
Click the long vertical line next to the shape.
A preview of the mirrored shape will appear.
Click the Apply box.
Click the Done box.
Any line within the object can be used as a mirror line. For example, the right vertical edge line could have been used as a mirror line.
Move
The Move tool is used to move entities to different locations on the drawing screen. See Figure 2-32.
Figure 2-32
Note that the Move tool creates a different result from that produced by the Copy tool. The Move tool will move an object, but not create a second one or leave the original object in its original location.
Start a new drawing, click the Metric tab, click the Standard (mm).ipt format, and click Create. Select the Start 2D Sketch option, and select the XY plane for the sketch.
Draw the object shown.
Click the Move tool located on the Modify panel under the Sketch tab.
The Move dialog box will appear.
Click the Select box and window the object.
Click the Base Point box and select a base point for the move.
Click the mouse when a new location has been selected.
Click the Done box.
In this example, the lower left corner was selected. Any point, even one not on the object, may be selected.
Copy
The Copy tool is used to create a copy of an object. The copy will not be in the same location as the original object, but the original object will be retained in its original location. See Figure 2-33.
Figure 2-33
Start a new drawing, click the Metric tab, click the Standard (mm).ipt format, and click Create. Select the Start 2D Sketch option, and select the XY plane for the sketch.
Draw the object shown.
Click the Copy tool located on the Modify panel under the Sketch tab.
The Copy dialog box will appear.
Click the Select box (the box may be on automatically) and window the object.
Click the Base Point box and select a base point for the move.
Click the mouse when a new location has been selected.
Click the Done box.
Rotate
The Rotate tool is used to rotate an object about a defined point. See Figure 2-34.
Figure 2-34
Start a new drawing, click the Metric tab, click the Standard (mm).ipt format, and click Create. Select the Start 2D Sketch option, and select the XY plane for the sketch.
Draw the object shown.
Click the Rotate tool located on the Modify panel under the Sketch tab.
The Rotate dialog box will appear.
Click the Select box (the box may be on automatically) and click all the lines in the object.
Click the Select box and select a center point for the rotation.
Enter a value for the angle.
In this example, a value of −45° was entered. The rotation angle could have been sketched.
Note
In Inventor, counterclockwise is the positive direction.
Click the Apply box.
Click the Done box.
The original object will disappear. To retain the original object, click the Copy box before clicking the Apply box.
Trim
The Trim tool is used to cut away unwanted parts of an object. Figure 2-35 shows a group of objects that includes a circle, a rectangle, and a line. Trim the line between the left side of the rectangle and the circle.
Figure 2-35
Click the Trim tool located on the Modify panel under the Sketch tab.
Locate the cursor on the entity to be trimmed.
The entity will change to a broken line.
Click the left mouse button.
The entity will disappear.
Extend
The Extend tool is used to extend entities to known boundaries. Figure 2-36 shows a line and a circle drawn with its center point at the endpoint of the line. Extend the line to the right-hand edge of the circle.
Figure 2-36
Click the Extend tool.
Move the cursor to the line.
The line will automatically extend to the next available entity. In this example, that is the edge of the circle.
Click the left mouse button.
Offset
The Offset tool is used to draw entities parallel to an existing entity. Figure 2-37 shows a line and a circle. Create a new line and a circle offset from the existing entities.
Figure 2-37
Click the Offset tool.
Click the line and move the cursor away from the line.
A new line will appear. It will be parallel and equal in length to the original line.
Position the offset line and click the left mouse button.
Use the Dimension tool to specify the offset distance; that is, the distance between the lines. Use the Offset tool to create a concentric circle relative to the original circle.
Editing a Sketch
Figure 2-38 shows a finished sketch. Any of the features may be changed by editing the dimensions.
Figure 2-38
To Edit the Cutout
Suppose the 5 × 15 cutout located at the top right corner of the object is to be changed to a 5 × 20 cutout.
Double-click the 15 dimension.
The Edit Dimension dialog box will appear. See Figure 2-39.
Figure 2-39
Change the text value to 20 and click the green checkmark.
To Change the Location and Size of the Circle
Change the hole to a Ø22, a horizontal location of 25, and a vertical location of 18. See Figure 2-40.
Figure 2-40
Double-click the diameter dimension, 15, and change it to 22.
Double-click the 20 and 15 dimensions and change them to 25 and 18, respectively.
Sample Problem SP2-1
The sample problem presented here is based on Figure P2-8 in the Chapter Project. The dimensions are in millimeters. See Figure 2-41.
Figure 2-41
Start a new drawing using the Standard (mm).ipt format.
Use the Rectangle tool to draw a 100 × 85 rectangle.
Use the Rectangle tool and add a rectangle aligned with the top horizontal edge.
Dimension the location and the depth of the rectangle.
Use the Trim command to remove the horizontal line segment to create a slot.
Remember, there are two lines to trim: the 100 × 85 rectangle and the smaller rectangle added in step 3.
Repeat the procedure to create a slot aligned with the bottom horizontal edge.
Note
As you create the lower slot, broken lines will appear to help align the edges of the slot with the upper slot. This eliminates the need for locational dimensions for the lower slot.
Dimension the height of the slot and trim away the central horizontal line segment.
Access the Circle tool and scroll the cursor along the left vertical line.
The midpoint of the line will appear as a filled colored circle.
Make the midpoint of the line the center of a circle and sketch the circle. Use the Dimension tool to create the Ø42 (R=21) circle. Trim away the excess vertical line.
Sketch the circular cutout by first sketching and locating a circle.
Sketch lines tangent to the circle to the right edge of the object.
Trim the excess lines.
Sketch, locate, and dimension the two circles.
Use the Fillet tool to add the R=10 rounded corners.
Click the 3D Model tab and select the Extrude tool. Click the Home tool to change the view orientation to a 3D view. Select the sketch as the Profile, enter an Extents Distance value of 8, and click OK.
Right-click the mouse and click the Finish 2D Sketch option. Select the Extrude tool. Select the sketch as the Profile, enter an Extents Distance value of 8, and click OK.
Chapter Summary
This chapter introduced most of the tools found on the panels under the Sketch tab, and each of the tools was demonstrated using a short sample exercise. Several of the tools were combined to form more complex drawing shapes. The chapter also showed how to edit sketches and presented a sample problem that required the use of many of the 2D tools.
Chapter Test Questions
Multiple Choice
Circle the correct answer.
1. Once a line has been sketched, which tool is used to add a dimensional value?
a. Sketch
b. Line
c. General Dimension
d. Auto Dimension
2. What is a curved line with multiple shape changes called?
a. Polynomial
b. Spline
c. Ogee curve
3. An ellipse is defined by its major axis and which other axis?
a. Lesser
b. Second
c. Minor
4. A chamfer is defined by which of the following?
a. Two distances
b. An angle and two distances
c. Two angles and a distance
5. Which of the following shapes is not a polygon?
a. Triangle
b. Hexagon
c. Circle
d. Square
6. Which tool is used to remove an unwanted portion of a line?
a. Erase
b. Trim
c. Offset
d. Move
7. Which tool is used to increase the length of an existing line?
a. Scale
b. Offset
c. Copy
d. Extend
8. The symbol Ø is used to define which of the following?
a. Radius
b. Diameter
c. Runout
d. Extension
Matching
Write the number of the correct answer from Column B on the line in Column A.
Column A
Column B
a. Defines a location and size for an entity ______
1. Perpendicular
b. Aligns two entities ______
2. Parallel
c. Defines two entities as 90° apart ______
3. Colinear
d. Defines a line in the X direction ______
4. Fix
e. Defines an entity equidistant from another entity ______
5. Horizontal
True or False
Circle the correct answer.
1. True or False: The General Dimension tool is used to add dimensional values to sketches.
2. True or False: A closed spline is a curved line that starts and ends at a common point.
3. True or False: Splines cannot be edited once drawn.
4. True or False: The Tangent Arc and Center Point Arc tools are flyouts from the Three Point Arc tool.
5. True or False: A fillet is a straight line across a corner.
6. True or False: A chamfer is a straight line across a corner.
7. True or False: A polygon can have any number of sides.
8. True or False: A mirror image is the same as a copied image.
9. True or False: A line offset from an original line has a different length than the orignal line.
10. True or False: Many different font styles are available for Inventor text.
Chapter Project
Project 2-1
Redraw the following objects in Figures P2-1 through P2-28 using the given dimensions. Create solid models of the objects using the specified thicknesses.
Click the New tool.
Click the Metric tab.
Scroll down and click the Standard (mm).ipt format.
Click Create.
Click the Start 2D Sketch tool on the Sketch panel.
Select the plane for the sketch.
Start a new line by clicking the Line tool and moving the cursor to the endpoint of the second line.
Click the point and drag the cursor to the original starting point of the horizontal line.
Click the point, right-click the mouse, and select the OK option.
Enter a Distance value of 10 and an Angle value of 45.
Click the top horizontal line and the right vertical line.
Trim the excess lines.
Sketch, locate, and dimension the two circles.
Use the Fillet tool to add the R=10 rounded corners.
Click the 3D Model tab and select the Extrude tool. Click the Home tool to change the view orientation to a 3D view. Select the sketch as the Profile, enter an Extents Distance value of 8, and click OK.
Right-click the mouse and click the Finish 2D Sketch option. Select the Extrude tool. Select the sketch as the Profile, enter an Extents Distance value of 8, and click OK.
