1 / 19

Working Drawings

Working Drawings. Unit 10. Working Drawings. Two basic types: Detail drawings of the parts produced Assembly drawings for each unit or sub-unit to be put together Convey engineering and design requirements to produce the finished part. Working Drawing Information. Order material

Download Presentation

Working Drawings

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Working Drawings Unit 10

  2. Working Drawings • Two basic types: • Detail drawings of the parts produced • Assembly drawings for each unit or sub-unit to be put together • Convey engineering and design requirements to produce the finished part.

  3. Working Drawing Information • Order material • Plan manufacturing operations, tooling, and manufacturing facilities • Process material • Inspect and control product quality and reliability • assemble • test and model • package, box, and ship • determine cost • catalog • install and service • conduct final acceptance test • make alterations • record for duplication, repair, or replacement

  4. Detail Drawings • Drawings made for a single part. • Provide all the information to produce that part. • Supplies the worker with the following information. • Name of the part. • Shape description of the part • Dimensional size of the part and the part’s features. • Notes detailing materials, special machining, finish, heat-treatment, etc..

  5. Detailing • Pull separate parts from the assembly and draw them individually • After Assembly Drawings • Details include appropriate views and dimensions • Standard items that can be purchased off the shelf are shown on the assembly drawing and listed in the parts list - no separate details required.

  6. Assembly Drawing • Show the working relationship of the various parts of a machine or structure as they fit together. • Supplies the worker with the following information. • Name of the assembly mechanism or subassembly. • Visual relationship of one part to another in order to correctly assemble the various parts • List of parts • Bill of materials may be included. • Overall size and location dim. When necessary to check clearance fitting.

  7. Selection of Assembly Drawings • Factors of View selection: • Depict the assembly in its natural position in space. • Defines clearly how the parts fit together. • Describes the functional relationship of the parts. • Minimum number of views needed to define the assembly should be used (often only one view is needed).

  8. Assembly Drawing Types • Prepared for each group of items that is to be joined together to form an assembly. • May be on same sheet as details or separate sheet. • Assembly is usually sheet number one. • Includes graphic layout (pictorial drawing), necessary notes, and a list or bill of materials. • Notes call out subsequent operations to be performed on the assembly.

  9. Sub-assembly • Variation of an assembly drawing. • Include a related group of parts

  10. Working Assembly • Fully dimensioned drawings • Combine the features of detail drawings with assembly drawings

  11. Provide necessary information to install or erect a piece of equipment. Installation Assembly

  12. Exploded Pictorial Assembly Drawings

  13. Hidden, Crosshatching, and Phantom Lines on Assembly Drawings • Hidden lines not shown. • Instead, use section views to describe internal parts. • Material symbols (including crosshatching is optional). • Showing a part before an assembly by using phantom lines and after the assembly operation by using object lines is also acceptable.

  14. Part Identification on an Assembly • The parts list is keyed to the assembly by ballooning the individual pieces of the unit. • Leader lines from balloons should not cross. • Balloon circles can be drawn between .5 and .75 inches in diameter.

  15. Example:

  16. Parts List • The assembly drawing must have a complete parts list. • Each parts list includes: • individual part numbers • name and description of each part • material and quantity of all items required for one complete assembly • Placed above the title block • Heading “Parts List” is placed on the bottom of the list and the part number read upward.

  17. Example:

  18. Revision of Engineering Drawings • Revision block used to record changes to the drawing. • Extremely important link in engineering documentation - changes have far reaching effects within organization. • Terminology used in revision blocks include: added, approval, change, deleted, obsolete, redrawn, revision, revision designation.

  19. Example:

More Related