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2. Answer the following questions
1. How many classes of cams do you know?
2. What kinds of machinery are cycloid motion curve cams used in?
3. What are the main cam follower systems?
4. What does the design of a cam begin with?
5. What is necessary to know in analyzing the action of a cam?
6. What is an inversion?
7. How is the pressure angle of a cam defined?
8. Why is the size of the pressure angle so important?
9. What is maximum pressure angle equal to?
10. Name the main reasons for a wide application of cam mechanisms in
modern automatic devices.
11. Draw schemes of roller follower cam.
12. Draw the scheme of closed-track cam.
13. In what conditions and under what circumstances can the impact
appear?
14. Enumerate the design stages of cam mechanisms?
15. Draw a diagram of follower motion.
16. How is the position of the revolution center of a cam in a mechanism
with translating roller follower determined?
17. Where should the axis of cam rotation be placed if it is necessary to
get a cam of smallest size?
18. What is the graphical way of constructing the profile of plane cams?
3. Discuss in pairs.
1. Laws of follower motion.
2. Define the sizes of cam mechanisms.
3. Define the possible position of the revolution cam center.
4. Study this table of verbs and related nouns of change in order to describe
graphs.
Direction Verb Noun
Up
climb
-
go up -
increase increase
rise rise
Down
decline decline
decrease decrease
dip dip
