Orthographic Projection Tutorial (AutoCAD)hobackas.faculty.udmercy.edu/e105/autocad/tutorial+xvii.doc · Web viewRefer to this figure when completing steps 1 – 3. Open up assembly-tut1.dwg

5/9/23 Assembly Drawing

ASSEMBLY DRAWINGS - Tutorial (AutoCAD 2000)

Objective: Use previously drawn details to create a complete assembly drawing of the following Drill Jig. Assembly of the details will be accomplished using functionally related features and modify commands such as MOVE, MIRROR, COPY, etc...

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Procedure: An AutoCAD drawing has been supplied to you (assembly-tut1.dwg). It contains the previously drawn details. (Note: Detail drawings can be moved from one file to another using the windows commands COPY and PASTE.) IMPORTANT!: When ever (OSNAP) appears in parentheses, it means that you should select the specified point using a object snap command.

Section 1: Creating the Assembly Drawing.

Refer to this figure when completing steps 1 – 3.

1. Open up assembly-tut1.dwg. The drawing should look like the figure above.2. Mirror the End Bracket to create the one for the left side.

a. Command: MIRRORb. Select objects: Using a window, select all of the End Bracket.c. Select objects: Enterd. Specify first point of mirror line: Select point A (OSNAP) e. Specify second point of mirror line: Select point B (OSNAP)f. Delete source objects? [Yes/No] <N>: No

3. Move the End Brackets to there functional placement relative to the Center Plate.

a. Command: Moveb. Select objects: Use a window to select all of the right/original End

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c. Select objects: Enterd. Specify base point of displacement: Select point C (OSNAP)e. Specify second base point of displacement or <Use first base point as

displacement>: Select point D (OSNAP)f. Use a similar procedure to move the left End Bracket in to its functional

position relative to the Center Plate.


4. Move the End Bracket/Center Plate assembly to there functional placement relative to the Base.

a. Command: Moveb. Select objects: Use a window to select all of the End Bracket/Center

Plate assembly.c. Select objects: Enterd. Specify base point of displacement: Select point A (OSNAP)e. Specify second base point of displacement or <Use first base point as

displacement>: Select point B (OSNAP)5. Copy and move the Flat Head Machine Screws into their function placement.

a. Command: Copyb. Select objects: Use a window to select all of the Machine Screw.c. Select objects: Enterd. Specify base point or displacement, or [Multiple]: Select any point near

the Machine Screw.

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e. Specify second base point of displacement or <Use first base point as displacement>: Move your mouse to the left and click to create the copy.

f. Command: Moveg. Select objects: Use a window to select all of the original Machine

Screw.h. Select objects: Enteri. Specify base point of displacement: Select point C (OSNAP)j. Specify second base point of displacement or <Use first base point as

displacement>: Select point D (OSNAP)k. Use a similar procedure to move the other Machine Screw into

position.6. On your own, Copy the Hex Head Nut and MIRROR the Hex Head Bolt.7. Using similar procedures as described above, Move the Hex Head Bolts and

Nuts into their functional positions.

Refer to this figure when completing step 8.

8. Clean up unwanted hidden lines in the assembly drawing.a. Lock the visible layer by selecting the Lock/Unlock icon in the layer pull

down window. (Note: When a layer is locked, you are not able to select any object on that layer. In this case, this will prevent you from accidentally selecting a visible line.)

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Lock/Unlock iconLocked = ClosedUnlocked = Open


b. Erase all hidden lines associated with the Machine Screw clearance holes in the End Brackets and the drill and tapped holes in the base.

c. Erase all hidden lines associated with the Hex Head Bolt clearance holes in the End Bracket and Center Plate. (Note: If you are having difficulty selecting the hidden lines, you can turn the visible layer off by selecting the On/Off icon (light bulb) in the layer pull down window.)

d. Unlock the visible layer.

Refer to this figure when completing step 9.

9. Erase duplicate centerlines and adjust there length. a. Erase the four centerlines labeled in the above figure.b. Turn you ORTHO on by selecting the Ortho icon at the bottom of the

AutoCAD window. (Note: The Ortho command prevents entities to be drawn or moved at angles different from 0, 90, 180, and 270 degrees.)

c. Click on one of the centerlines that needs to be lengthened. Notice that 3 blue grip boxes appear. Click on one of the end grip boxes and move it to its new position. Do the same for the other end. Lengthen the other centerlines in a similar fashion.

d. Turn you ORTHO off by selecting the Ortho icon at the bottom of the AutoCAD window.

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Ortho icon



10.Change all visible lines in the Machine Screws to hidden lines.a. Select all visible lines in both Machine Screws. Don’t worry if hidden

lines also get selected.b. In the Layer pull down window select the hidden layer (h).

c. Hit the ESC twice to get rid of the blue grip boxes.11.On your own, change the visible lines of the Hex Head Bolts that run inside

the End Brackets and Center Plate to hidden lines. (Note: You will end up changing a portion of some visible lines to hidden that should remain visible. We will fix that later.)

12.Change your current layer to Visible by selecting it in the layer pull down window.

13.Draw a visible line from point A (OSNAP) to point B (OSNAP). Draw a similar visible line on the bottom portion of the bolt and on the other bolt.

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Section 2: Balloon the Assembly.

Refer to this figure when completing steps 1 – 4

1. Draw the balloons and part numbers.a. Set your current layer to be the dimension layer (dim).b. Draw two circles (radius = 7 mm) in the approximate locations shown

on the above figure.c. Use the TEXT and Move commands to insert a number 1 in the center

of both circles.d. Command: ARRAYe. Select objects: Use a window to select the left balloon and part

number.f. Select objects: Enterg. Enter the type of array [Rectangular/Polar] <R>: Rh. Enter the number of rows (---) <1>: 3i. Enter the number of columns (|||) <1>: 1j. Distance between rows or specify unit cell (---): 40

2. Use a similar procedure to ARRAY the top circle twice. First use these parameters (rectangular array, 1 row, 3 columns, 50 mm between columns), and then use these parameters (rectangular array, 1 row, 3 columns, -50 mm between columns).

3. MIRROR the left hand side vertical column of balloons using the vertical center line of the assembly as your mirror line.

4. Erase the bottom right balloon.

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Refer to this figure when completing steps 5 – 7

5. Draw a leader line connecting the parts to their balloon and part number.a. Command: DIMb. Dim: Leaderc. Leader start: Use the object snap command NEAr to select the left

side of the BASE.d. To point: Use the object snap command QUADrant to select the right

quadrant of the bottom left balloon.e. To point: Enterf. Dimension text <0>: Space then enter.g. Use a similar procedure to connect leaders to the rest of the balloons.

This is the order of the part selection starting at the bottom left and working your way up and over and then down. (BASE (already done), End Bracket, Machine Screw, Bolt, Nut, Center Plate, Nut, Bolt, Machine Screw, End Bracket). (Note: For the horizontal row of balloons, you will choose the bottom quadrant.)

h. Dim: Exiti. Erase all the horizontal leader attachments.

6. Use the DDEDIT command to change the part numbers in the balloons to the number that corresponds to the part that you are pointing to.

7. Mirror the numbers in the two balloons on the right.a. Command: MIRRORb. Select objects: Select the backwards number 5.c. Specify first point of mirror line: Select the top QUADrant of the

balloon. d. Specify second point of mirror line: Select the bottom QUADrant of the

balloon.e. Delete source objects? [Yes/No] <N>: Yesf. Use a similar procedure to MIRROR the backwards number 2.

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Section 3: Create a Parts List.


1. Create the horizontal lines of the parts list.a. Command: OFFSETb. Specify offset distance or [Through] <Through>: 10c. Select object to offset or <exit>: Select the top line of the border.d. Specify point on side to offset: Select a point below the line.e. Select object to offset or <exit>: Select the new line.f. Specify point on side to offset: Select a point below the line.g. Repeat the above process until you have 7 spaces to use for text.

2. Create the vertical lines of the parts list.a. Command: OFFSETb. Specify offset distance or [Through] <Through>: 55c. Select object to offset or <exit>: Select the right line of the border.d. Specify point on side to offset: Select a point left of the line.e. Select object to offset or <exit>: Enterf. OFFSET the right border line to the left by the following distances; 85,

195, and 225.g. Use the TRIM command to trim off the unwanted lines.

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3. Use the TEXT and Move commands to fill in the parts list text. (Note: A short cut that I have found is to fill in the top line and use the ARRAY and DDEDIT commands to create the other lines.)

Section 4: Title Block Information

1. Use the DDEDIT command to fill in the required title block information.

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Documents

Orthographic Projection Tutorial (AutoCAD)hobackas.faculty.udmercy.edu/e105/autocad/tutorial+xvii.doc · Web viewRefer to this figure when completing steps 1 – 3. Open up assembly-tut1.dwg