Drafting of various geometries using Chamfer, Fillet tool in AutoCad

Aim: - to draw given sketches in AutoCAD.

Procedure: -

Tools used: - line, circle, mirror, copy, fillet, trim and rotate.

Sketch 1

1. Open new file and set units to decimal and precision to 0.00.
2. Use command line and draw a line of 3 units horizontally. Then @2.12<45 , @2.83<135. Then 2 units line horizontally. Then press “c” to close the geometry.
3. Command offset- select 3m line and give offset of 1m and 2.50m.
4. Command circle – at 1m offset draw a circle of dia 1.2 and at 2.5 draw a circle of dia 0.8m.
5. Erase the excess lines.
   

Sketch 2

1. Units- architectural.
2. Command line- select a random point and draw a line of 8’. The at right end @-1.9<270. Use the relative coordinate system for ease. Draw line of 2’10” @225 angle. complete the drawing by using line command.

Sketch 3

1. Units- engineering.
2. Command line- 5’ in x direction. 3’3” vertically. 2’6 ½ in x direction. At 5’ line in the right end erect a line of 1’6”. Now close the geometry.
3. Command offset- make an offset of 5’ line at 1’6”. And offset of 3’3’’ line at 1’30’’.
4. Command circle- make a circle at the intersection of offset line for a dia of 1’6”.
5. Erase the excess lines.

Sketch 4

1. Units- decimal.
2. Command line- select orthomode on and polar tracking on for ease. Start making lines of given dimensions in given directions.

Sketch 5

1. Units- decimals.
2. Command line – make a rectangle of 11.5 x 6 using line command.
3. Command offset – select 6m line and make an offset of 1.5 twice on both left and right side. Then make an offset of 2.75 in the middle.
4. Command circle- make a circle on the first offset of dia 1 and 2 at midpoint of the line. In the center line make a circle of dia 3 at midpoint.
5. Command copy – copy the 1 and 2 dia circle to the point as shown in the sketch.

Sketch 6

1. Units – decimal.
2. Command line – make a line of 2 units in horizontal and 1.5 in vertical. Make a rectangle for first figure.
3. Command offset – make an offset of 0.5 twice vertically and once horizontally.
4. Command trim – trim the excess lines.
5. Command line – make a line of 1.5 units in horizontal and 1.5 in vertical. Make a square for second figure.
6. Command offset – make an offset of 0.5 twice horizontally and once vertically from the bottom.
7. Command trim – trim the excess lines.
8. Command line – make a line of 2 units in horizontal and 1.5 in vertical. Make a rectangle for first figure.
9. Command offset – make an offset of 0.5 once vertically and once horizontally. Join the offset lines diagonally.
10. Command trim – trim the excess lines as shown in the figure.

Sketch 7

1. Units- decimal.
2. Command line- draw a line of 210 m in x direction. 75m in -y direction and 100m in -y direction.
3. Draw circle with center at 100 and 75m line with radius of 35 and 25 respectively. Make two more circles of dia 50 and 30 at 100m and 75 m line respectively.
4. Use the offset tool to give offset of 20m from left and draw a rectangle of 70 x 30m then make a copy of the rectangle at a distance of 30m.
5. Use the fillet tool and give the radius of 35,20,6 and 15.

Sketch 8

1. Units- decimal
2. Command circle- draw a concentric circles of dia 5 and 4. Use the line command and draw line of 4.275 from the midpoint of the circle. Draw a circle of dia 0.9 and radius of 0.9.
3. Command line- draw a tangent line of 5 dia circle and 0.9 radius circle.
4. Mirror – mirror the geometry and trim the excess lines.

Sketch 9

1. Units- architectural
2. Draw a line of 32’6”. Draw a circle radius 8 and 9 on left and right side of the line.
3. Use the fillet tool and give a radius of 41’8’’ at top and 20’10” at the bottom.
4. Trim the excess lines.

Sketch 10

1. Units- decimal
2. Make a rectangle of dimension 10x 10. Use the offset tool and give a small offset of 0.5 .
3. Copy the rectangle and rotate it to 45 degrees. Move the rotated rectangle in the centre.
4. Trim the geometry as required.

Sketch 11

1. Units- architectural.
2. Command line- make a line of 3’ and move the cursor according to the the geometry and make lines of 4’6”, 4’6” 1’2”,5’, 1’2”, 4’6”, 4’6”,3’, 9’, 20’4”, 9’ to close the geometry.
3. Use the offset tool and make an offset of 2’8” and 3’7” of the top line.
4. Make an angle of 90 degrees and 60 degrees respectively.
5. Draw a square of 3’ in the center and rotate it 45 degrees.
6. Trim the excess lines.

Results: -

The given sketches are drawn in AutoCAD using different tools accurately.