HM Flashcards
Minimum diameter HM coil we can sell?
Generally 60”. Large pull butts (3-4”+) get dicey
What do scalper roughers cost?
$62.05 for 2, $31 for 1
What do scalper finishers cost?
$48.80 for 5, $9.76 for 1
HM trim acceptance
-0, plus 1/4”
What to do if Ingot is stuck in RM
If the slab is stuck in the mill and there is force on it, keep the coolant on the rolls and slab. Cutting it up or taking it to the basement is much less risk then fire cracking the rolls.
If the slab is between the rolls in the mill under force for more than 5 mins…you gotta take the rolls out.
How to tell if a roll mark is too bad?
Pencil. Smooth edges = good, rough edges & catching = bad
How to know if in roll force
1200 ft per min
How to know if idling
600 ft per min
How many papers go in a book
45
What HM stands does HGC have to be locked out to change WRs on?
3 & 4
How long does C160 air practice take?
~15hrs per Shonique
What is the code for changing HCM WRs for pitting?
PI
What is the code for changing HCM WRs for roll marks?
RM
What is the code for changing HCM WRs for count?
RT
What is the code for changing HCM WRs for chock failure?
CF
What is the code for changing HCM WRs for bruising?
BR
What is the code for changing HCM WRs for spalling?
SP
How close do rolls have to be to the routine limit to allow operators to enter RT as the reason for changing?
Within 100
How much does a 5 stand weight - recovery hit?
~3000 lbs
What’s the most common reason for blown centers
Jacks too high in 5 & 6
How do we stay gauge after a backup change?
At the beginning & after 3 passes on the 1st ingot
What’s the goal for HM sideset
0
What’s the goal for HM %c?
.4 or .45, but varies on product. Some go as low as .3 like light gauge C343H.
RR is .2 above target
.8 is typically scrap
Anything negative is scrap
Is st 6 sled pit a confined space?
No
Are stands 1-5 sled pits a confined space?
Yes
Are backup pits a confined space?
Yes
How are tension bars set
Bar 1 - half inch gap between the bar & template
All other stands: sliver of a gap, basically laying on top
What is normal Torque @ RM?
1.6 for everything except C160, & C160 is normally 1.4 to prevent splits, & we see signs of splits we go to 1.2
What is normal voltage @ run?
700 volts, below is issue w/ 15KV. 650 is a problem
What is the absolute max for the shear sump?
40” gets coolant into the position transducer & is an 8 hr event for maintenance to replace the cylinder
Does C64Z go to trays or saddles?
Trays
How to restart pusher?
Turn on, purge, relight. Can load charging line but pusher must be above 650* for 3.5 hours before can cycle shoes.
What areas of thr scrap conveyor do doors have to be open to clean?
The scrap door and the sides of the coil car.
Scalper table position for KISS calibration
59.6” +/- 0.6”
Whats the shortest 5 stand you can do?
320” is the shortest 5 stand you can do
Rm roll balance pressure
2000 lbs. Yoke balance 800 lbs. Relief valves are set at 2300 lbs.
