program applications for canned cycles 150401d Flashcards Preview

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Flashcards in program applications for canned cycles 150401d Deck (13):
1

to determine the angular distance between evenly spaced holes on a bolt circle pattern divide 36 by the number of holes in the pattern

  • true 
  • false

true

2

to determine the distance between the bolt circle center and any hole on a bolt circle pattern

  1. multiply the sin of the holes angle times the bolt cirlce radius
  2. multply the cosine of the holes angle times the bolt circle radius

2 multply the cosine of the holes angle times the bolt circle radius

3

to determine the distance between the bolt circle center and any hole on a bolt circle pattern in the Y

  1. multply the sin of the holes angle times the bolt circle radius
  2. multply the cosine of the holes angle times the bolt circle radius

1 multply the sin of the holes angle times the bolt circle radius

4

once you determine the lead  value for a one inch diameter drill having a given point angle you can use it as a constant. you can multply this value times the diameter of any drill having the same point angle to detemine its lead?

  • true 
  • false

  • true

5

reamers have no lead that you must consider when calculating hole depths

  • true
  • false

false

 

6

you determine the lead of a tap by

  1. multipying 0.3 times the tap diameter
  2. multiply the number of imperfect threads times the taps pitch
  3. dividing the tap diameter by 0.3
  4. multuplying the tap length times 0.3

multiply the number of imperfect threads times the taps pitch

7

to determine the depth of through holes add the workpiece thickness to lead and break through amount

  • true
  • false

true

8

if programming a c bore tool that has a pilot you should program the extreme end of the pilot

  • true
  • false

 

false 

you should program the cutting edge surface of the c bore tool that have a pilot. you must still know the length of the pilot but programming the cutting edge surfaces that variations in pilot lengthdo not affect the c bore depth

9

if you use a hole machining canned cycle it is not ossible to avoid an obstruction between holes by moving the cutting tool around the obstruction in the x and y axes

  • true 
  • false

false

  • you can avoid an obstruction while using hole machining canned cycles by including an L0  in X or Y axis commands that move around th eobstruction
  •  

10

to comand multiply holes to be machined in one canned cycle comand with a L word you must use absolute positioning

  • true 
  • false

false

you must use incremental positioning to command mutliple holes to be machined with canned cycles using the L word

11

with most machining centers the center of rotation for a polar co ordinate system must correspond to the program zero poit in the x and y axes

  • true
  • false

true

12

the g code used to specify a temporary shift of th eprogram zero is

  • g 51
  • g 53
  • g 52
  • g 54

g 52

13