ut false alarm
DESCRIPTION
A presentation on how to reduce false alarm in auto UT.TRANSCRIPT
STRENGTH THROUGH INTEGRATION
REDUCE
FALSE ALARM
STRENGTH THROUGH INTEGRATION
What is False Alarm?Regular Graph
False Alarm, Not actual defect
STRENGTH THROUGH INTEGRATION
TEAM ACITVITY
Material Machine
Steel Grade, Bar Size, RR, Ovality, Grinding, Super Heat,
Scale, Cooling Condition, Bend,
Scale in water, Water Filtration,
Probe identification
STRENGTH THROUGH INTEGRATION
*Data Collection
Activity
STRENGTH THROUGH INTEGRATION
*Data Analysis
23.67
2.44
0
5
10
15
20
25
B L OOM P R ODUC T AV G . F A %
B R E C O P R ODUC T AV G . F A %
S eries 1
STRENGTH THROUGH INTEGRATION
Trial -1 Press Straightened Vs Roller Straightened
F A %
9.6
87.3
0
20
40
60
80
100
R oller S tr P res s S tr
F A %
Two Roll straightener
Press straightener
F A
21
12
7 7
31
31
0
5
10
15
20
25
0.5 -1.0
1.0 -1.5
1.5 -2.0
2.0 -2.5
2.5 -3.0
3.0 -3.5
3.5 -4.0
4.0 -4.5
F A
Bend wrt No. of bars in Press Straightened.
Same Heat, Size,Rolling Condition.
Conclusion: Scale can be the reason for FA
STRENGTH THROUGH INTEGRATION
Trial-2 Scale
Ring Grinding Acid Wash MPI Before conditioning
After conditioning
Conclusion: Scale is the reason for FA.2Roll St. will Solve this
100%
0
0.2
0.4
0.6
0.8
1
1.2
1 2
After conditioning
Before conditioning
Before & After conditioning
STRENGTH THROUGH INTEGRATION
Trail 3Comparison between Dirty V/s Fresh water
Dirty water
Fresh water
STRENGTH THROUGH INTEGRATION
Improvement Plan in Machine
• Improve Water Filtration
Steel Tank
Water Pit
UT Tank
Wire Mesh Filter
Water Filter existing
Proposed filter
Wire Mesh Filter proposed
STRENGTH THROUGH INTEGRATION
False Alarm Probe Identification
• Maximum FA observed in probe 3 & 4
9 8
35
53
11
00
10
20
30
40
50
60
P robe 1 P robe 2 P robe 3 P robe 4 P robe 5 P robe 6
STRENGTH THROUGH INTEGRATION
Action Plan
• Trial to be taken after changing Probe location..• Water Filtration strengthening.
Next Step• Install two roll straightener• Study temporary counter measures until the installation of two roll straightener.