Xun #4

Question 1

When we are determining the machining conditions, we must consider time, cost, and quality, with potential tradeoffs existing between them. What are the two main models we look at for this?

Answer 1

1. Maximum Production Rate Model
2. Minimum Cost Model

LOOK AT FIRST HALF OF CAPP LECTURE 4 FOR THIS BECAUSE THE EQUATIONS ARE WEIRD AND LONG AND SCARY, THANK YOU!

Question 2

What are the three main approaches to CAPP that we look at in this course?

Answer 2

1. Variant Process Planning (based on Group Technology)
2. Generative Process Planning (AI approach)
3. Semi-generative Process Planning (interim approach)

Question 3

Define Group Technology (GT)

Answer 3

Group Technology is a technique for identifying and bringing together related or similar components in a production process in order to take advantage of their similarities

Question 4

What are five advantages of Group Technology?

Answer 4

Supports development of plant layouts

Better use of special tooling

Reduces: material transfer times, material handling, machine setup times

Question 5

What are the four steps in a variant process plan?

Answer 5

1. Define coding scheme
2. Form part families
3. Develop standard process plans
4. Modify standard process plan

Question 6

What are two examples of part families in Group Technology?

Answer 6

Question 7

What are three disadvantages of Group Technology?

Answer 7

1. Components to be planned are limited to the similar components planned previously
2. Require experienced process planners to modify standard plan for a specific component
3. Cannot be used in an entirely automated manufacturing system (needs human intervention)

Question 8

What is Generative Process Planning? How does it work?

Answer 8

Artificial intelligence approach - process plans are formed using decision logic, formulas, technology, algorithms, etc. with input being a description of the part in the form of part code number