CH 21 HW exercises assignment - Tagged
pdf
keyboard_arrow_up
School
University of California, San Diego *
*We aren’t endorsed by this school
Course
286
Subject
Mechanical_engineering
Date
May 19, 2024
Type
Pages
3
Uploaded by MajorKnowledgeHamster17
CH21 Selected HW Exercises
1.
( ) Which two of the following are examples of forming the work part geometry in machining, as opposed to generating the geometry: (1) broaching, (2) contour turning, (3) drilling, (4) profile milling, (5) taper turning, and (6) thread cutting?
2.
( ) Which one of the following is an example of combined generating and forming the work part geometry in machining: (1) broaching, (2) contour turning, (3) drilling, (4) profile milling, (4) taper turning, and (6) thread cutting? 3.
( ) A shaping operation is best described by which one of the following: (1) a single-point tool moves linearly past a stationary work part, (2) a tool with multiple teeth moves linearly past a stationary work part, (3) a work part is fed linearly past a rotating cutting tool, or (4) a work part moves linearly past a single-point tool?
4. ( ) A lathe can be set up to perform which three of the following machining operations: (1) boring, (2) broaching, (3) drilling, (4) milling, (5) planning, and (6) turning? Write your answer in the ( ). Do not circle your answer.
CH21 Selected HW Exercises
5.
( ) In a turning operation, the change in diameter of the work part is equal to which one of the following: (1) 1
depth of cut, (2) 2
depth of cut, (3) 1
feed, or (4) 2
feed? 6.
( ) Machined parts can be classified as rotational or nonrotational. Which two of the following are examples of operations that create nonrotational geometries: (1) boring, (2) drilling, (3) milling, (4) planning, and (5) turning? 7.
( ) A turning operation is performed on a cylindrical work part whose diameter = 120 mm and length = 450 mm. Cutting speed = 2.0 m/s, feed = 0.25 mm/rev. We require the material removal rate of 2300 mm^3/sec, estimate the nearest value of the depth of cut (mm) to reach the requirement? (1) 2.3, (2) 4.6, (3) 5.8, (4) all solutions are not correct
8.
( ) For the metal part as shown, there are no thread in the holes, select the appropriate best sequence of the machining using the following process?(a) casting, (b) turning, (c) boring, (d) drilling, (e) shaping, (f) milling, (g) tapping, (h) broaching, (i) plastic molding? (1) b-c-f-d, (2) a-b-c-d, (3) b-f-h-d, (4) b-f-d-g Write your answer in the ( ). Do not circle your answer.
9.
( ) A 20-mm-diameter twist drill with a point angle of 118° will be used to create a through hole on a steel plate that is 15 mm thick. We use the cutting speed = 0.5 m/s , and feed = 0.3 mm/rev . Estimate the nearest value of the machining time (minute)? (2) 1.2, (2) 0.75, (3) 0.15, (4) all solutions are not correct 10.
( ) For the metal part as shown, there are threads in the holes, select the appropriate sequence of the machining using the following process? (a) casting, (b) turning, (c) boring, (d) drilling, (e) shaping, (f) milling, (g) tapping, (h) broaching, (i) plastic molding ? (1) b-c-d-g, (2) a-b-c-d, (3) b-f-h-g, (4) b-f-d-g Selected HW Exercises
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help