Description
Model: DIT**3B, DIT**3B, DIT**3B
Maximum impact energy: ***0J, ***0J, ***0J
Functions:
This type of machine is specially for conducting drop-weight
test to determine nil-ductility transition (NDT) temperature of
ferritic steels
Standards: GB/T ***3, ASTM E**8
Features:
1. SIMENS
PLC controls and touch screen provide high reliability and
versatility.
2. Automatic
specimen feeding and automatic positing
3. Frame
structure is made of solid steel plate with high stability under
impact
4. Striker
is made of high strength steel plate with high impact
resistance
5. Use
chain to lift striker with high precision in height
6. Self-lock
design for striker clamping
7. Full-closed
guard screen
8. Special
design tools for support change
Description:
This machine is built with main frame, striking system,
striker lifting system, striker release/clamp system, specimen
auto-feeding system, safety protection device and control
system.
1. Main
frame
Main frame is constructed with bottom plate, four columns, and
top plate. Bottom plate is made of *5# steel plate; four columns
are steel pipes for four-point support to ensure the stability, top
plate is made of LY*2 aluminium plate. Connections between columns
and bottom and top plate are used with flange. Though the whole
frame is high, the center of gravity is low with better stability.
The top plate is made of light aluminium with easy installation.
Guide rail is constructed with precise smooth bar, with surface
chrome plated and hardened, with good linearity and high precision.
Two ends of smooth bar are tightened by screw and bolts, ensuring
high rigidity of main frame and rail, avoiding any loosen
components caused by vibration.
2. Striker
Striker is made of whole machined steel plate, ensuring the
striker stiffness and improving the safety, not loosening after
long time use. Striker tup is made of alloy steel, with good impact
resistance , little abrasion, long service life, and easy to
change.
3. Lifting
system
Lifting system consists of motor, crosshead, chain wheel,
chain, and encoder. Lifting motor is equipped with brake, featuring
small size, light weight, high efficiency, low noise and high
stability. It will lock when power is off, the striker will not
accidently fall down. Compared with steel wire rope, chain features
small elasticity with precise height measurement. Also chain has
higher strength with little abrasion, and safer than wire rope.
Motor is mounted at the bottom of the main frame, easy to mount and
service.
4. Striker
release/clamp device
It is specially design and will automatically lock after
clamping the striker. This device won’t open caused by gravity even
when the power is off. It is equipped with approach switch to
detect the position. If striker is not clamped, crosshead won’t
move.
5. Specimen
auto-feeding device
It is designed of four-bar linkage structure and pneumatic
driving, featuring fast specimen feeding in only 5 seconds with
high accuracy and simple operation. Meanwhile, it has auto
center-aligning function. Only put the specimen onto this device,
press the button on the control panel, this device will
automatically feed the specimen onto the anvil and align the
center, without labor work, improving efficiency and safety. After
finishing impact, this device will push the specimen out with
simple operation and high reliability.
6. Safety
protection device
There are guard screen around the main frame to prevent broken
specimen from splitting, and also prevent operators from entry to
the main frame. Guard screen is equipped with door position limit
switch. The machine will lock when the door is open, eventually
preventing any fault operations and guaranteeing the safety of
operator.
7. Control
system
Control system in this machine provides automatic operations
for striker lifting, zero positioning, specimen auto-feeding,
impact, and striker clamping, which greatly reduces labor intensity
and improves working efficiency and operating safety. Simens PLC
programmable controller is used for the whole control system, touch
screen is used for terminal operating interface, rotary encoder is
used for sampling and controlling the height. PLC features high
stability and reliability and strong anti-interference ability,
avoiding any fault operation and improving safety of operators.
Meanwhile this control system has alarm functions for such errors:
specimen is not in the right position, striker is not
locked, guard screen is wrong, striker is not lifted to the
correct position.
Parameters
|
Model
|
DIT**3B
|
DIT**3B
|
DIT**3B
|
|
Maximum energy (J)
|
***0
|
***0
|
***0
|
|
Minimum energy(J)
|
**0
|
**0
|
**0
|
|
Maximum tup mass (kg)
|
*0 (*0**0)
|
**0 (*5**5)
|
**0 (**0***0)
|
|
Tup mass accuracy
|
±1%
|
|
Drop height(mm)
|
**0~***5
|
**0~***2
|
**0~***2
|
|
Velocity of drop (m/s)
|
3.8~7.6
|
3.8~7.7
|
3.8~7.7
|
|
Speed of tup raise (m/min)
|
7
|
|
Height resolution (mm)
|
0.1
|
|
Height accuracy(mm)
|
≤±*0
|
|
Hardness of tup nose
|
HRC*8~*2
|
|
Radius of tup nose(mm)
|
R*5±0.1
|
|
Hardness of support anvil
|
HRC*8~*2
|
|
Alignment accuracy of center of
tup nose, specimen and anvil center (mm)
|
≤±2.5
|
|
Support anvil span (mm)
|
P*1: **5
P*2,P*3: **0
|
|
Specimen dimension (mm)
(length x width x thickness)
|
P*1: (**0±1)×(*0±2)×(*5±2.5)
P*2: (**0±1)×(*0±1)×(*0±1)
P*3: (**0±1)×(*0±1)×(*6±0.5)
|
|
Frame dimension (mm) (LxWxH)
|
***0mm×***0mm×***0
|
|
Power requirements
|
*-phase, *-line, AC **0V
*0A
|
|
Air supply
|
0.4~0.7Mpa, Φ6 quick coupler for air
pipe
|
Standard accessories:
|
No.
|
Description
|
Quantity
|
|
1
|
Main frame
|
1 set
|
|
2
|
Striker
|
1 set
|
|
3
|
Tup
|
2 sets
( one is for space use)
|
|
4
|
Striker lifting device
|
1 set
|
|
5
|
Striker release/clamp device
|
1 set
|
|
6
|
Guard screen
|
1 set
|
|
7
|
Specimen auto-feeding device
|
1 set
|
|
8
|
Specimen feeding pneumatic cylinder
|
2 sets
|
|
9
|
Anvil
|
1 set
|
|
*0
|
Lifting motor
|
1 set
|
|
*1
|
Control system
|
1 set
|
|
*2
|
Foundation bolt
|
4 sets
|
|
*3
|
Inner hexagon spanner
|
1 set
|
