Product Description
MG srl Italy MG 4120 V – THREE ROLLS PLATE BENDING MACHINE – PLANETARY TYPE (2013)
MACHINE REF :12926
Machines For Sale — . Sheet Metal & Plate, Bending Rolls
MAKE :MG srl Italy
MODEL :MG 4120 V – THREE ROLLS PLATE BENDING MACHINE – PLANETARY TYPE
YEAR OF MANUFACTURE :2013
CONTROLLER :CNC
SPECIFICATION :MG 4120 V – THREE ROLLS PLATE BENDING MACHINE – PLANETARY TYPE
4000 x 120 mm capacity
Year 2013 – fully reconditioned – available shortly !! With 12 months Guarantee
Technical data:
Installed power HP. 220
Rolls Table length mm. 4,100
Rolling capacity mm 120
Pre-Bending Capacity mm 100
Top roll diameter mm. 940
Side rolls diameter mm. 800
Rolls Rotation speed -proportional mt/min 0 – 5
Width mm 4,740
Total Length mm 11,053
Height mm 5,118
Weight Kg. 180,000
Voltage/Frequency/phases 415 V – 3 – 50hz
Tilting of Side Rolls for cones Degrees max 2°
Bending Force Tons 2400
Total Torque Kg/DaN 85,000
Rolls 42CrMo 4
Hardening HRC 55-60
No. Of Driven rolls 3
Rolls Drive Hydro-motors 3
DESCRIPTION :MG 4120 V – THREE ROLLS PLATE BENDING MACHINE PLANETARY TYPE
Year 2013 fully reconditioned
Used 2013- MG 3 roll double pinch plate bending machine
Fully hydraulic
This is the newest evolution in the field of plate bending machines. Three driven rolls with double pinch to perform the pre-bending in both sides without having to turn the material the other way around. Its versatile and quick to use.
Technical data:
Installed power HP. 220
Rolls Table length mm. 4,100
Rolling capacity mm 120
Pre-Bending Capacity mm 100
Top roll diameter mm. 940
Side rolls diameter mm. 800
Rolls Rotation speed -proportinal mt/min 0 – 5
Width mm 4,740
Total Length mm 11,053
Height mm 5,118
Weight Kg. 180,000
Voltage/Frequency/phases 415 V 3 – 50hz
Tilting of Side Rolls for cones Degrees max 2°
Bending Force Tons 2400
Total Torque Kg/DaN 85,000
Rolls 42CrMo 4
Hardening HRC 55-60
No. Of Driven rolls 3
Rolls Drive Hydro-motors 3
The max performances are referred to shells of diameter equal or larger than 5 times the top roll diameter and with material with a yield point within R = 260 N / mm².
MACHINE CAPACITY CHART
Width Diameter Bending Thickness Prebend Thickness Bending Thickness Prebend Thickness Bending Thickness Prebend Thickness mm mm
Material based on yield point 260 N/mm2
Material based on yield point 310 N/mm2
Material based on yield point 360 N/mm2 4000 1034 72,00 60,00 64,80 54,00 60,48 50,40 4000 1410 90,00 75,00 81,00 67,50 75,60 63,00 4000 2820 108,00 90,00 97,20 81,00 90,72 75,60 4000 4700 120,00 100,00 108,00 90,00 100,80 84,00 4000 9400 126,00 105,00 113,40 94,50 105,84 88,20
3333 1034 78,87 65,73 70,98 59,15 66,25 55,21 3333 1410 98,59 82,16 88,73 73,94 82,82 69,01 3333 2820 118,31 98,59 106,48 88,73 99,38 82,82 3333 4700 131,45 109,54 118,31 98,59 110,42 92,02 3333 9400 138,03 115,02 124,22 103,52 115,94 96,62
2667 1034 88,18 73,48 79,36 66,14 74,07 61,73 2667 1410 110,23 91,86 99,20 82,67 92,59 77,16 2667 2820 132,27 110,23 119,05 99,20 111,11 92,59 2667 4700 146,97 122,47 132,27 110,23 123,45 102,88 2667 9400 154,32 128,60 138,89 115,74 129,63 108,02
2000 1034 101,82 84,85 91,64 76,37 85,53 71,28 2000 1410 127,28 106,07 114,55 95,46 106,91 89,10 2000 2820 152,74 127,28 137,46 114,55 128,30 106,91 2000 4700 169,71 141,42 152,74 127,28 142,55 118,79 2000 9400 178,19 148,49 160,37 133,64 149,68 124,73
CONICAL BENDINGS__________ __________________
Conical bendings with a conicity over 4 degrees reduce machine performaces. This is due to the unbalanced load on the top roll and its bearings. The more is the cone tilting the more the machine performance will decrease, till a maximum of a 50% in length and in bending thickness.
CONE UP TO 4 DEGREES : Machine Performace 92%
CONE UP TO 15 DEGREES : Machine Performace 70%
CONE UP TO 30 DEGREES : Machine Performace 60%
CONE UP TO 60 DEGREES : Machine Performace 50%
CONE UP TO 90 DEGREES : Machine Performace 40%
CONE UP TO 130 DEGREES : Machine Performace 30%
Standard equipment:
– Movable Console
– Hydraulic system for opening the machine and ejecting the tube.
– Safety system to conform with EC Rules.
Parts Used :
Planetary Gear boxes By BREVINI, DINAMIC OIL (Italy)
Hydraulic Motors By SAI, INTERMOT (Italy)
Hydraulic Valves By ARON, DUPLOMATIC (Italy)
Electric Parts By TELEMECANIQUE (France)
Bearing By SKF, FAG, RKB, (Germany, Italy)
Forged Rolls By LUCCHINI, FMA, NUOVA OFAR, VIENNA (Italy)
Standard Characteristics:
– Elecrto welded monolithic structure normalized and machined on the new generation CNC borig machines
– Exclusive integrated hydraulic system developed for height performances
– Parallelism control by means of massive torsion bars to guarantee height precisions also where the newest hydraulic systems fail.
– Permanent lubrication system
– Planetary movement of the rolls to avoid any kind of friction and to guarantee height precision for the machine life.
– Automatic compensation between top and bottom roll (servotronic)
– Stepless tilting of bottom and side rolls hydraulic 1.5/2°
MINIMUM PERFORMABLE DIAMETER _____
The minimum poossible diameter to be bent depends on several factors such as :
Top roll diameter
Plate thickness
Material
The machine top roll diameter influences the performing of the minimum diameter for the simple fact that we wont get a lower diameter than the top roll one.
As for the plate thickness, lets say we are using a machine with maximum capacity 100mm, on a 3mt length. We wish to bend a plate working at the maximum capacity. In this case the minimum possible diameter well get will be three times the top roll one. Lets say now we wish to use the same machine at 60% of its maximum capacity, the case we wish to bend a 3mt plate with a 60mm thickness. At this point the minimum diameter we get will be 1.1 times the top roll one. D min (Full Capacity) = 5 times the top roll diameter D min (60% of Capacity) = 1,1 times the top roll diameter
MG plate bending machines are designed and built on a basis of 260 N/mm2 yield point material.
TECHNICAL AND STRUCTURAL FEATURES_____ _____
A) Automatic simultaneous balancing: bending rolls parallelism controlled by massive TORSION BARS working in symbiosis with sofisticated valves controlling the oil flow . This system grants the complete and steady parallelism without resetting.
B) Planetary movements: bending rolls planetary movement that reduces frictions at minimum, frictions very common on traditional movement machines, such as diagonal or horizontal sliding guides .
C) Permanet lubrication: All machine components are pre-lubricated and sealed following a unique system granting lubrication for the whole machine life.
D) Direct drive: Replacing of all low efficiency components (gears, bushings, mechanical gear boxes, transmission belts, sliding guides
) with the most efficient epicycloidal gear boxes DIRECTLY COUPLED on the rolls, bearings and idraulic motors, this way all machine strenght is focused on the material to bend (positive strenght) with consequent Energy saving. This system conforms to the International High efficiency and Anti-Pollution standards.
MOTORIZATION_______ _____
An MG 3 roll plate bending machine motorization is made of three hydraulic motors, directly assembled
to the rolls by particular motion transmission gears and gear boxes that give the maximum performances
with the minimum possible strenght. The motion is given to the motors trough an hydraulic pump, wich
is set in action by an electric motor, it is successively given to the riductors and then to the rolls. All the
three rolls are motorized in order to get a perfect sliding of the plate.
Furthermore, motorization is very important during the pre-bending phase, it allows to position the
plate at the centre of the rolls with the maximum precision, without losing it. We will get this way a prebend
that will never be bigger than 1,5 o twice the material thickness.
ROLLS CAMBERING_____________________ _____
A good part of MG technology is the application on rolls of a variable cambering on the basis of material
thickness. Each MG machine is different from the others even among same models because the rolls do
not have the same cambering. Furthermore, during the bending work a particular penomenon takes
place, a phenomenon that is not always visible : the rolls get subject to deflection, but, thanks to the
cambering, they do not reach the breaking point, and grant the very good result in their bending
performace.
PERMANENT LUBRICATION SYSTEM_______ _ _____
Thanks to the using of high quality and high resistance materials, MG can grant a system of permanent
lubrication. By using autolubricated bearings it will be enough only to grease the parts during the
assembling. MG plate bending machines maintenance wont be a problem, only a periodical refilling of
the oil will be necessary.
BUILDING FEATURES_______________ _____
– Electro-welded steel frames worked on CNC working stations.
– Rolls movement at variable speed from 0 to 100% (this does not include machines with electro-hydraulic controls and Lynx controlled).
– High performace Hydraulic motors, with energy saving, no secondary transmissions such as chains, gears, belts …
– Immediate stopping of all moments by overcenter valves.
– Variable speed shaping side rolls (this does not include machines with electro-hydraulic controls and Lynx controlled).
– Bending rolls by massive torsion bars.
– Hydraulic opening system for pipes ejection.
– Top roll automatic balancing (for machine opening).
– Rolls mounted on high loading bearings and double row rolls.
– Pinching rolls double cambering so to adapt to the natural deflection of rolls themselves during the working process, this will avoid all defects.
– Machine wholly hydraulic.
– One operator only for all bending operations. STANDARD COMPONENTS_____ _____
– Integral hydraulic system, with all hydraulic protections at EC norms.
– Electrical system complete with all overload protections at EC norms.
– Mobile control console for a secure and correct position of the operator .
– Hydraulic machine opening for the pipe ejection.
– Multiple stop system that grants the best security .
– Side rolls that can be used for material squaring.
VANTAGGI DELLA CALANDRA A TRE RULLI__________ ___________
The MG 3 roll plate bending machine is characterized by its user friendness. Advantages are various:
Working speed, only one operator is required.
Working can be made in one only pass, following the steps here below:
a. Square
b. Pre-bending on an edge
c. Pre-bending on the other edge
d. Final bending
The plate is fed into the machine horizontally thanks to the support of the two side
rolls(B e D).
The plate is istantaneusly squared thanks to a line, purposly dug into the rolls, wich gives to the
operator a streight line to follow.
The space to the limit of the machine reduces to one side only, thanks to the possibility of squaring and
bending in one only step.
We advice a 3 rolls bending machine:
For an high productivity
For the possibility to bend conical plates
Because it is very user friendly
IMPORTANT CONSIDERATION________________________________ ___________
FLAT PART____________________________ ______
If the choice of the machine has been made attentively, the minimum
flat part you get will be 1,5 or twice the plate thickness. Even in this
case, the plate thickness and its yield point, relating to the machine
capability, make the difference.
CONICAL BENDINGS__________ __________________
Conical bendings with a conicity over 4 degrees reduce machine
performaces. This is due to the unbalanced load on the top roll and its
bearings. The more is the cone tilting the more the machine
performance will decrease, till a maximum of a 50% in length and in
bending thickness.
b = (1,5 o 2) * a
Description
MG srl Italy MG 4120 V – THREE ROLLS PLATE BENDING MACHINE – PLANETARY TYPE (2013)
Price: Write Us
Location : United Kingdom
Quantity : 1
Availability : 14 Jun 2017