Question for CNC Reading
1.) Explain what is CNC? _
2.) What kind of code does it read? _
3.) A milling machine is most closely to which type of drafting.
additive / subtractive
4.) CNC was preceded by NC code. Explain the difference.
The Design Process(Security Doorstop)
Problem I.D. - In these times of heightened security, we have been asked to develop a simple
door stop that can be easily actuated to facilitate the door being locked and remain open wh
Interchangeability of manufactured parts is a critical element of present day production. The
production of closely mating parts is possible but as the fit becomes closer it may also become
economically unfeasible to produce. For this reason,
Types of Fits
Preferred Precision Fits The American National Standards Institute publishes the Preferred
Limits and Fits for Cylindrical Parts (ANSI B4.1-1967) to define terms and recommending
standard allowances, tolerances, and fits for mating parts. Th
Table for Running and Sliding Fits
VALUES SHOWN BELOW ARE IN THOUSANDTHS OF AN INCHES
Clearance Standard Clearance Standard
A mold or mould is a hollowed-out block that is filled with a liquid like plastic, glass, metal, or
ceramic raw materials. The liquid hardens or sets inside the mold, adopting its shape. A mold is
the counterpart to a cast. The manufactu
Categories of Materials
Metals and Alloys
Polymers or Plastics
Organics are or were living organisms
Composed of mostly carbon and
Structure depends on the way cells
develop, not by human manipulation
A manufacturing process where a solid is melted, heated to proper temperature, and is
then poured into a cavity or mold, which contains it in the proper shape during solidification.
Simple or complex shapes can be made from any metal that
Material and Process Justification
Mechanical Engineering Avon High School
Write a paragraph justifying the material and process that you would use for the doorstop project.
Use the guiding questions below.
Based on what you have learned from the material
Devoted to the implementation of existing technology within a recognized field of
engineering. They work with engineers to improve products, manufacturing or
construction practices. They are employed in a wide verity of fields.
To search the specifics for your career go to the web site bls.gov/oco. Scroll down to the
Ways to use the Occupational outlook handbook to use the A-Z index.
Search the A-Z Index for the job of interest and answer t
Engineering Career Report
1. Students will select one area of engineering.
2. Students will conduct research about the area they have chosen. The research notes are to
Description of the field
Areas of specialization
Avon High School
Engineering Research Project Rubric
Student presents Reader has
Organization logical, interesting
logical sequence follow
Starting a Structure Lecture:
List considerations for the start of a building
o Cost and financing
How does financing work?
o Prime lending rate
o Interest and current rates
o Personal proper
Avon High School
Sketching Review Lecture
1.) The design / manufacturing link. How it works. Design engineers will create a product and
send the idea to a manufacturing dept. The goal is to come away with the same object.
Choose one student to dr
PROBLEM SHEET NO.
D IRECTIONS- MAKE A MECHANICAL DRAWING OF EACH OBJECT PICTURED. USE ONE
SHEET OF ORTHOGRAPHIC PROJECTION PAPER FOR EACH DRAWING. PLACE TAP, FRONT
AND RIGHT END VIEWS IN THE' AREAS INDICATED. START TOP AND FRONT VIEWS AT
For problems 10 through 13, sketch the three
views needed for a multiview drawing. Select
proportions and sizes.
10. Sketch three-view drawings for the objects in Figure
2-75A through 2-75R
11. Sketch three-view drawings for the objects in Figu