TECH 104 – Technical Graphics Communication Week 11: Isometric Sketching

TECH 104 – Technical Graphics Communication

Week 11:

Isometric Sketching


Here’s what we talked about last time…Working Drawings

First,


Generally, a complete set of Working Drawings for an assembly includes:

1.) Detail Drawings of each non-standard part.

2.) An Assembly or Subassembly drawing showing all the standard parts in a single drawing.

3.) A Bill of Materials (BOM).

4. A Title Block.

Assembly Drawing of a Piston & Rod containing 8 parts.An assembly drawing normally consists of the following:

1. All parts drawn in their operating position2. A parts list or Bill of Materials (BOM)3.Leader lines with balloons indicating all parts.4. Machining and assembly instructions

It’s own Drawing Number

Part Numbers(of individual

parts)

Also,

Detail Drawing of the retainer ring used to fasten the rod to the piston.


A Closer Look at Title Blocks

A. Name & Address of CompanyB. Title of the DrawingC. Drawing NumberD. Names and dates of drafters,

checker, issue date ,contract number, etc.

E. Design ApprovalF. Additional Approval BlockG. Drawing Scale H. Federal Supply Code for

ManufacturersJ. Drawing Sheet SizeK. Actual or estimated weightL. Sheet Number

They Contain:


The information normally included in a parts list is as follows:1. Name of the part.2. A detail number for the part in the assembly.3. The part material, such as cast iron or bronze.4. The number of times that part is used in the assembly.5. The company assigned part number.6. Other information, such as weight, stock size, etc.

And Attached to Title Blocks…Parts Lists


Also on Many Assembly Drawings…Revision Blocks

Record any changes - Found in upper-right corner


Remember Standard Thread Notes:


And How to Specifying Tap Drill Size:


And Thread Representation:


And Finally a Segway to Today’s Topic - Pictorial Assemblies

Sectioned Assembly

PictorialSketching

Classification of Sketches

With Isometric, Remember…“30, 30, Vertical”

Isometric and Non-Isometric Liines and Planes

Steps in Creating an Isometric Sketch

! !

Steps in Creating an Isometric Sketch

Use the“Box In”Method

Constructingan Isometric Drawing HavingNon-Isometric Lines

ConstructingAngles in an Isometric Sketch

Locating Points to Create an Isometric Drawing of an Irregular Object.

ConstructingDrawings with an ObliqueSurface

ConstructingIrregular Curves in an Isometric Sketch

TECH 104 – TechnicalGraphics Communication

This Week’s Sketches

Assignment # 32 · Page 64 (1, 2, 3, 14)(ISOMETRIC SKETCHES 1)

Assignment # 33 · (12, 24, 34, 35) On PowerPoint Only(ISOMETRIC SKETCHES 2)

∙ Isometric Grid Paper to be used

∙ 4 Objects per Page / Two Pages – Total Points = 40

Isometric Sketches 1

1. 2.

3. 14.

Isometric Sketches 2

12. 24.

34. 35.

PracticeProblems

PracticeProblems

PracticeProblems

PracticeProblems


Week 12:

Isometric Sketching (Continued)

Documents

TECH 104 – Technical Graphics Communication Week 11: Isometric Sketching