MEC322 - Introduction + Metrology

What is Manufacturing?

Application of physical and chemical process to alter the geometry, properties and appearance of materials into parts. For the benefit of increase economics.

Difference between Primary, Secondary & Tertiary Industries?

Primary Industries - These of sectors that focus on collect materials from the earth within itself. i.e Forestry, Mining and Agriculture.

Secondary Industries - These are sectors that focus on using primary industries purpose and creating these into consumer goods. i.e Automotive, Electronics

Tertiary Industry - These are sectors that provide services based on the secondary industries purpose. i.e Legal, banking.

What is the two product categories?

Consumer goods - Products purchased by a consumer

Capital goods - These are products that are purchased by the manufacture.

What is a job shop?

These are companies that make small number of products due to the complexity of there design.

What are the two types of facility that medium production uses?

Batch Production - Creates medium of hard products

Cellular Manufacturing - Create soft productsW

What are the two categories of mass production?

Quantity Production

Flow Line Production

What are Manufacturing Capabillities?

• Technological processing capability

• Physical Product Limitations

• Production Capacity

How is Processing Capabilities affect Manufactoring

When manufacturing you must have the specific machine for that material meaning that shop will now will be specialize in that specific machine.

How is Physical Productions Limits affect Manufacturing

Product maximums are created because production due to machinery.

How is Production Capacity affect Manufacturing

The amount of products that can produced are or the limited based on the operators available or the amount of materials that are present. More known as plant capcity

How can we define a metal? + Two types

Usually Alloys that are composed two or more metallic elements.

Type #1 - Ferrous Metals are iron based

Type #2 - Non-Ferrous Metals are all other metallic elements and there alloys.

How do we define Ceramics?

Ceramics are defined as materials that are a combination of metallic and non-metallic elements.

Two common types of Ceramics

#1 - Crystalline ceramics. A common example is clay

#2 - Glasses: Based on Sillica

How do we define Polymers? + 3 Branches

These are structural units that extremely long compound formula. Defined being created as a -mer.

Types

#1 - Thermosetting Polymer

#2 - Elastomers

#3 - Thermoplastic Polymer

How do we define a composite?

These are materials that created in two or more phases. Having multiple materials combined within each other creating property state that individual not possible.

What are the four Processing Operations? + Define each

Solidification Processes - Starting a material as heated liquid.

Particulate Processing - Starting with materials all in powdered forms.

Deformation Processes - Starting the material as a ductile solid.

Material Removal Process - Starting the material as a ductile metal.

What are the two types of Assembly Operations?

Joining Process - Creating a firm connection. Welding

Mechanical Method - Using fastening techniques. Threaded Faster (Screws & Nuts)

How can we define Metrology?

Science of measurement.

Difference between Tolerancing & Dimensioning?

Dimensioning - Uses the linear and angular portion of the specific design.

Tolerancing - Allowing variation of different parts to adjust for unperfect factors

What is Bilateral Tolerancing?

This means that tolerance of a dimension piece is in both the positive values and the negative values. While also not having to be the same value in itself

What is Unilateral Tolerance?

This a tolerance type that only permits positive tolerancing or negative tolerancing on the perfect dimension size.

What is Limit Dimensions?

This is a tolerance where it has a upper limit and a lower limit present only. (4.995 - 5.003).

Difference between MMC and LMC?

MMC - Most Material Condition. Smallest Hole and Largest Shaft.

LMC - Least Material Condition. Smallest Shaft and Largest Hole.

MMC is a tight fit

LMC is a loose fit

Interference Fit

This is where a hole and shaft must be inserted manually by human for or hydraulically depending on the component itself.

What does GD&T

What geometric dimensioning and tolerancing represent is focused on the shape and location of the tolerance.