Post on 17-Dec-2015
Permission granted to reproduce for educational use only.
• Explain terms and standards related to various types of drawings used in industry.
• Describe how detail drawings are defined and categorized in industry.
• Identify the unique characteristics of casting and forging drawings.
• Identify the unique characteristics of purchased part control drawings.
Permission granted to reproduce for educational use only.
• Identify the unique characteristics of modifying drawings.
• Describe the unique characteristics of pattern development and welding drawings.
• List and describe other specialized types of drawings used in industry.
Permission granted to reproduce for educational use only.
Working Drawings
• Detail drawings contain complete information about producing a part
• Assembly drawings contain information about the assembly of two or more parts
Permission granted to reproduce for educational use only.
Detail Drawings
• Includes:– Name of the part– Shape description– Size description– Notes– Materials– Special requirements
Permission granted to reproduce for educational use only.
Detail Drawings
• Monodetail drawing: Contains complete information about producing one part
• Multidetail drawing: Contains information about producing two or more related parts; not very common, but allowable for situations such as specially matched parts
Permission granted to reproduce for educational use only.
Casting Drawings
• Shows the dimensions necessary to create the mold of a cast part
Permission granted to reproduce for educational use only.
Machining Drawings
• Shows the dimensions necessary to convert a casting into a finished part
Permission granted to reproduce for educational use only.
Casting/Machining Drawings
• One detail drawing may show both the casting dimensions and the machining dimensions
Permission granted to reproduce for educational use only.
Control Drawings
• Shows the specifications of a purchased part
• May serve as a bid document
Permission granted to reproduce for educational use only.
Modifying Drawings
• Shows the specifications for making one part from another or for making changes to a part once delivered
Permission granted to reproduce for educational use only.
Pattern-Development Drawings
• Shows the specifications for making the flat pattern of a folded part
Permission granted to reproduce for educational use only.
Welding Drawings
• Shows the separate pieces that will be welded together
• Appears somewhat like an assembly drawing
Permission granted to reproduce for educational use only.
• What are the two basic types of working drawings?
Detail and assembly
Permission granted to reproduce for educational use only.
• What is the difference between a monodetail drawing and a multidetail drawing?
A monodetail drawing contains only one part, while a multidetail drawing shows more than one multiview drawing on a single sheet.
Permission granted to reproduce for educational use only.
• List at least six types of detail drawings.
Casting and forging, machining, purchase part control, altered-item, modification, pattern-development, welding, installation, selected-item, tube-bending, matched-set, and contour-definition drawings.
Permission granted to reproduce for educational use only.
• What is the difference between a casting drawing and a machining drawing?
A casting drawing shows the dimensions necessary to create a mold of the part. A machining drawing shows the dimensions needed to convert a casting into a finished part.
Permission granted to reproduce for educational use only.
• What is the purpose of a purchased part control drawing?
To document various engineering requirements to assure interchangeability of items each time they are purchased.
Permission granted to reproduce for educational use only.
• What does a modifying drawing describe?
A part that is manufactured not from raw materials, but by altering another part.
Permission granted to reproduce for educational use only.
• Why would a pictorial view be shown on a pattern-development drawing?
To show the part in its folded (finished) state