coil Membrane Panel Production Line , System Tube Bending Machine
mainly used in the superheater, reheater, economizer serpentuator
processing of large-capacity power plant boiler. This uses means of
opening the upper die and lifting lower die. Angle control, pulse
encoder; imported proportional valve controls the bending speed,
boosting pressure; parameters can be controlled through the touch
screen.
parameters:
Tube diameter | Ø32~ Ø76mm |
Tube thickness | 3~12mm |
Tube material | Carbon steel, low alloy steel, head resisting steel and stainless
steel |
Max .bending capacity | Ø76×12 |
Max. tensile strength | 700N/mm² |
Max. bending radius | 250mm |
Min. bending radius | 1D(thickness≥10% diameter) |
Max. bending angle | 190° |
Bending angle precision | ±0.1° |
Bending speed | 0~3rmp |
Min. straight section between two adjacent elbows | ≥120mm |
Minimum length of tube ending | ≥1500mm |
Ending techniques of tube length | ≥1700mm |
The distance between heading seized tube and the center of the
bending model | 1500mm |
Maximum expansion of length of serpentuator tube row | 144m |
Maximum running torque of bending model | 8tm |
Maximum stroke of heading machine | 28t |
Maximum boosting spring force | 20t |
Maximum boosting stroke | 880mm |
Maximum loading pressure of hydraulic system | 21MPa |
technical requirements:
l Feeding tube means (choice)
means parameters | roller | Cartype |
Turnaround feeding precision |
| ±0.2 mm/10m |
Turnaround feeding speed | 0～35 m/min | 0～35 m/min |
Max. feeding length once | Infinite | 10m |
Feeding force | Φ76×10 | At speed of 35 m/min carry the tube of length 60 M weight 1000 kg |
l Tube is separable from the lower die and the upper die during
transporting tube.
l Bending moment:Meeting the tube of length 60m, weight 1000kg
bending requirement.
l Bending force:Meeting minimum bending radius requirement
l Blank holder device need be installed when processing thin-wall
serpentuator.
l Blank holder device should be reasonable in structure and
equipped with automatic lubrication device.
l The position of boosting clamp should be adjustable; the chuck
position had better close the starting of bending.
l Bending tube program should store 15 sets
l The main components adopt imported brands (proportional valve,
servos, PLC, input interface), which are available at home.
l Equipped with Oil temperature control system, which could
regulate the oil temperature to ensure that keep 25℃～50℃through
electric heating system and water cooling system.
l Bending process could be automatic, but it could also stop if
needed at any time; manual control is fit to single action.
Acceptance criteria:
l Ovality : ≤10%
Ovality =2×(Dmax-Dmin)/(Dmax+Dmin)×100%
l Thinning volume
(t-t0)/t≤1/(4×R/D+2)
Where: t=tube thickness
t0=min thickness of outside elbow
R=elbow radius
D=tube diameter
l Other parameters of elbow should meet the JB/T1611 and UG0156
requirements
l Oval elbow, the thinning should not be less than the following
requirements:
Relative bend radius | Ellipticity | Maximum thinning rate |
R=1.2D | 10 | 12 |
R=1.5D | 8 | 10 |
R=2D | 5 | 5 |
