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Assembly Drawing

Mohamad Ikhwan Zaini Ridzwan

mikhwanr@eng.usm.my

EMD101-Engineering Drawing

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Assembly Drawing

You will learn to:

create a 2D assembly drawing

incorporate an exploded view into an assembly drawing, and

generate a Bill of Materials (BOM).

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Assembly Drawing

Assembly drawings show all the parts and how they go together

Dimensioning is not usually requiredHidden lines usually omitted3D CAD packages can generate assembly

drawings directly from assembly models

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Elements of an Assembly Drawing

All parts are shown in one drawing•assembled view•sectioned assembly•exploded assembly

Parts list or bill of materials (BOM)•part ID, quantity, description, catalogue number, etc.

Balloons•each part is identified by a numbered balloon, and referenced to the parts list

Machining and assembly instructions

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Balloons

Parts list(BOM)

Isometric

Assembly Drawing

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Exploded Assembly Drawing

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Creating an Assembly Drawing

• Open the assembly file “Sliding brace assembly.sldasm”. Make sure that the assembly is in the ‘collapsed’ configuration

• OK to accept the Drawing Template

Uncheck the box

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2D Assembly Drawing

In the new drawing window, select the Standard 3 View, and make sure it is in Third angle projection

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Adding an Exploded View

Select the Model View Tool from Drawings group

Select Trimetric from the list

Trimetric view

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Adding an Exploded View

Check the box

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Right click the Trimetric View and Select Properties

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Exploded View

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Creating a Bill of Materials

• Select any of the drawing views

• From the main menu, select Insert: Tables: Bill of Materials

• Accept the default selections

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Edit the title box

Click on the Part Number cell, and select Column Properties

Edit the title box to read PART NAME

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Bill of Materials

• The drawing is almost complete, but the item numbers in the Bill of Materials are not linked with the components in the drawing.

• We will add “balloons” with part numbers to the drawing.

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AutoBalloons

• Select the exploded Trimetric Views.

• Select the AutoBalloons Tool from the Annotations group of the CommandManager.

• Balloons will be added to the view.

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AutoBalloons

• Click and drag the part numbers to relocate the balloons.

Circular –

Triangular –

Hexagon –Circular split line

Balloon styles

Item numberQuantity

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The Shock assembly

Other Example

The exploded state of the Shock assembly

The Bill Of Material for the Shock assembly

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Tutorial – Advanced drawing – Assembly drawing views