4. BOGIE FRAME
Y-FRAME
-STEEL SHEETS(St-52)
TWO SIDE FRAMES CONNECTED BY TWO CROSS BEAMS
-SUPPORT BRAKE UNITS.
BOGIE FRAME ON THE PRIMARY SPRINGS AND SUPPORTS
VEHICLE BODY THROUGH BOLSTER.
BOLSTER-BOGIE
FRAME
THROUGH
SECONDARY
SUSPENSION.
8. MATERIAL PROPERTIES:
UTS IN Mpa
YIELD
STRENGTH
Mpa
ELONGATI
ON %AGE
IMPACT
CHEMICAL
%AGE:
S355J2G3;
EN10025
490-630
355
GS20Mn5V;
DINl:17182
500 – 650
360
SG400/18;
IS:1865
400
250
SG400/15;
IS:1865
400
250
22
24
18
15
27J AT -20
0
C
C 0.23, Mn
1.7, Si 0.6, S
&P 0.045
70 J
--
--
C 0.17 to
---0.23, Si 0.60,
Mn 1.00 to
1.50, S≤
0.020,
P≤
0.015, Cr ≤
0.30, Mo ≤
0.15, Ni
0.40
≤
---
9. Primary suspension
Four nos each per bogie -nested coil springs, primary
vertical dampers, control arm, elastic joints-connecting the
bearing on wheelset to bogie frame.
Flexible guidance.
21. BRAKE CALLIPER UNITS
AXLE MOUNTED DISC BRAKE
INBUILT SLACK ADJUSTER IN BRAKE
CYLINDERS
CALLIPER RATIO 1:2.17 FOR ALL
COACHES EXCEPT ACCN/SG & POWER
CAR WHICH IS 1:2.48
35mm BRAKE PADS
JURID
877/BECORIT984 KB & SABWABCO.
32. ANTI-ROLL BAR:
A TORSION BAR WITH TWO FORKS- BETWEEN
BOGIE FRAME & BOLSTER,CONNECTED BY
ROLL LINKS.
RESISTS ROLLING MOTION OF COACH.
AS PER UIC515-1 TILTING CO-EFFICIENT <0.4.
36. BUFFER HEIGHT ADJUSTMENT
Shims at body/bogie connection.
Shims NOT added/removed in Primary and
Secondary Suspension for wheel wear compensation
or buffer height adjustment.
43. CURVE NEGOTIATION:
CONTROL ARM (SGCI TO IS:1865) CONNECTING
AXLE BEARING AND SIDE FRAME THROUGH
ELASTIC CONNECTION.
FLEXIBILE GUIDANCE TO WHEELSET.
44. SUSPENSIONS OF VARIANTS
THE COMMON SUSPENSION GROUPS ARE:
GS,SCN,SLR
CC,EC,CB,FAC/EOG,ACCW/EOG.
ACCN/EOG,FAC/SG,ACCW/SG
ACCN/SG,WLRRM
WLRRM
SIDE 2.
SIDE 1.
SLR UNDERSLUNG.