Normal Speed Non-continuous Pilger Mill

Shanghai Pan Zhihua Machinery Manufacturing Co.,LTD

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Features

Advantages:
Low maintenance cost
Easy operation
Low break-down rate (servo structure)
Product with high precision

Characteristics:
1)The transmission of the main transmission system is carried out by either mean:1) Using a high-strength nylon-based flat transmission belt, in which the stress is even.2) Main motor directly connects to driving shaft. The operation is reliable and smooth, and the rolling mill system has the function of overload protection.
2）The stroke of the saddles is increased, the long-journey rolling is carried out by annular ring type roller, the rotation angle of the roller is changeable, the groove working section is lengthened, the length of deformation zone is increased, and therefore the uniformity of metal deformation in the rolling process is increased, the feed amount can be increased, and the quality of the finished pipe can be improved.
3）The rotary feed system is controlled with German Rexroth AC servo, wherein the feed amount is accurate, reliable and stepless adjustable, the deviation of feed amount is not more than 2%, the size of the rotation angle can be adjusted, the billet will be rotated and fed for two times in the same rolling process, and therefore the distribution of rolling force is even, the axial force is reduced significantly, the high-precision pipe with small deviation of the outer diameter and wall thickness can be obtained, and the yield is high.
4）Compared with side feeding, the rolling mill, which uses end feeding mode, reduces mandrel-removing device; moreover, the position of the mandrel in the deformation zone is accurate, length of mill is shortened, the mode is suitable for the rolling of long billet, and the working efficiency of the rolling mill is improved.
5）Function of loading, unloading, feeding and other procedures are controlled with PLC program,, and therefore the degree of automation is high.
6）The rolling pressure of machine is reduced by using a curve type core bar, and therefore the deformation of the billet metal is even and reasonable.
7）The main gears are provided with hardened tooth grinding process, by which the transmission is smooth, and the noise is low.
8）The main shaft and important gear are made of high-strength alloy steel.
9）The inner surface of the billet used is lubricated to improve the inner surface quality of the pipe, while prolonging the service life of the core bar.
10）The rolling machine uses annular ring type roller, curve type mandrel, as well as the rolling mode of dual rotation and dual feed, and therefore the correction ability to the billet of which the wall thickness is uneven is relatively strong.
11）The equipment has a mandrel fracture detection device, by which the equipment will be automatically stopped in case of the fracture of mandrel, and therefore the equipment can be protected well.
12）A number of patented technologies are applied to the equipment, such as floating type brake, and hydraulic locking nut of the rack. (The feed of the before dead center shall be determined according to the specific rolling condition)

Application

Working principle ：

Prefabricate the tool and die of the size required, and then install the tool and die within the equipment. In the working process of the equipment, the billets will be fed forward successively, in which the upper and lower roller will move in a reciprocating way, the outer diameter and wall thickness of the billet will be re-rolled to realize the size required by the customer through the physical change.

Equipment description
This mill is mainly composed of main power unit, main driving case, saddles, stand base, billet chucks, carriage #1 , mill bed #1, feeding and turning case #1, middle bed, mandrel chucks, etc.
The power of the main power unit is mainly supplied through the motor. The main driving unit includes a driving structure for transmitting the power to the saddles. The saddles are moved in a reciprocating way to drive the rolling of the product. The stand is the working platform of saddles. The billet chuck is used for rotating the billet. The carriage is used for driving forwards the billet, and the mill bed is the working platform of the carriage. The feeding and turning case is core part of equipment, and the servo motor is used for controlling the rotating and feeding of billet. The mandrel chuck is mainly used for rotating the mandrel.

Technical data

LG10HS

LG15HS

LG30HS

LG40HS

LG60HS

LG90HS

LG150HS

Outer diameter of billet

Φ10-25mm

Φ14-32mm

Φ22-46mm

Φ25-63mm

Φ40-89mm

Φ76-133mm

Φ76-168mm

Wall thickness of billet

0.9 -4mm

1.2 -5mm

1.5-7mm

3-14mm

4-20mm

Length of billet

2500-5000mm

3000-6000mm

2000-8000mm

Outer diameter of finished product

Φ7-16mm

Φ11-25mm

Φ14-32mm

Φ19-40mm

Φ25-60mm

Φ51-114mm

Φ57-140mm

Wall thickness of finished product

0.7-2mm

0.9-3mm

1-5mm

2-10mm

3-18mm

Maximum length of finished product

20000mm

25000mm

28000mm

Length of journey

392mm

490mm

641.7mm

772mm

961.66mm

1101.74mm

Length of effective deformation

300mm

370mm

460mm

600mm

800mm

900mm

Strokes

120 times/min

110/min

100 times/min

85 times/min

70 times/min

Maximum elongation

≤3.5

≤3.8

≤4

≤4.2

≤4.5

≤5

Roller diameter

Φ144-151mm

Φ204-207mm

Φ250mm

Φ300mm

Φ375mm

Φ490mm

Φ520mm

Diameter of roller gear

Φ138mm

Φ189/196mm

Φ224/232/240mm

Φ270/280mm

Φ324/336/348mm

Φ416/432/448mm

Feed amount

≤4mm/times

≤5mm/times

≤6mm/times

≤8mm/times

≤10mm/times

≤12mm/times

Driver mode

Servo motor

Rotation angle

57°

Turning& feeding mode

Dual rotating and feeding

Loading mode

End of equipment

Power of main motor

45kw

75kw

90kw

110kw

160kw

250kw

280kw

Main controller

Rexroth PLC

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