Cold Rolling Hydraulic CNC Bending Machine Roller with Alloy Steel Forging

Product Description

Product Description

Rolling machine roller refers to a cylindrical component used on a rolling machine to bend and form metal sheets (steel plates, aluminum plates, stainless steel plates, etc.). They exert tremendous pressure and friction to cause continuous plastic deformation of the sheet, ultimately forming a circular arc or cylindrical shape with a predetermined curvature.

Application

Hydraulic CNC rolling machine,which is widely used in industries such as wind power, pressure vessels, shipbuilding, etc. that require high rolling accuracy.

Feature

1. Common materials: high-strength and high-quality alloy steel.
2. Heat treatment: It must undergo quenching and tempering treatment (quenching+high-temperature tempering) to obtain comprehensive mechanical properties of high strength and good toughness.
3. The surface of the roller body is usually quenched to achieve high hardness (HRC55-60 or higher), while the core maintains toughness, thus achieving the unity of wear resistance and fatigue resistance.
4. For plates such as rolled stainless steel or non-ferrous metals that require extremely high surface requirements, the roller surface should be plated with hard chromium to increase smoothness and rust resistance.
5. Large rollers usually use forged blanks to eliminate casting defects, obtain dense metal flow lines, and improve comprehensive mechanical properties.
6. Through multiple processes such as rough turning, precision turning, and grinding, ensure the dimensional accuracy, cylindricity, and surface roughness of the roller body.
7. For high-speed rollers, dynamic balance correction must be carried out to prevent equipment vibration, ensure smooth operation and molding quality.

Function

Apply pressure: Apply bending moment to the sheet by moving up and down or fixing the position.
Guide the board: Ensure that the board travels along the predetermined trajectory during the rolling process to prevent deviation.
Determining forming accuracy: The rigidity, accuracy, and surface quality of the roller directly affect the roundness, straightness, and surface smoothness of the formed workpiece.
Power transmission: The driving roller (usually the lower roller) provides torque through a motor and gearbox to drive the sheet forward.

Steel Grade

The roller needs to withstand extremely high alternating stress and wear, so the material requirements are very strict.
Common material: High strength and high-quality alloy steel,such as:

	C/%	Si/%	Mn/%	Cr/%	Mo/%	V/%	Ni/%	Cu/%	S/%
9Cr2	0.80-0.95	≤0.40	≤0.40	1.30-1.70	—	—	—	—	≤0.030
8Cr2MoV	0.80-0.90	0.15-0.40	0.30-0.50	1.80-2.40	0.20-0.40	0.05-0.15	≤0.25		≤0.025
9Cr2Mo	0.85-0.95	0.25-0.45	0.20-0.35	1.70-2.10	0.20-0.40	—
9Cr2MoV					0.20-0.30	0.10-0.20
9Cr3Mo				2.50-3.50	0.20-0.40	—
8Cr3MoV	0.78-1.10	0.40-1.10	0.20-0.50	2.80-3.20	0.20-0.60	0.05-0.15	≤0.80	≤0.25	≤0.025
8Cr5MoV	0.78-0.90	0.40-1.10	0.20-0.50	4.80-5.50	0.20-0.60	0.10-0.20			≤0.020

Production Procedure

Forging ,rough machining,heat treatment: normalizing, quenching and tempering,surface quenching ,final processing

Equipment

Eternal company own heavy duty workshop 8,000 square meters ,till now more than 100 sets machine facilities have been installed.  Main facility is as following : 2000ton fast forging press , heating treatment furnace, long 10 meters quenching tank , 500 tons straightening machine , 6 meters middle-frequency surface quenching machine, 3-11 meter CNC horizontal lathes, CNC machining center, 10 meters deep hole boring machine, 10 meters honing machine , including all kinds inspection and test tools etc. 

Partners

Our products have been exported to Europe, U.S.A , South Africa, Russian, Mexico, Brazil, Peru, Chile, Korea, Vietnam, Indonesia , Middel East etc 
more than 80 countries , our quality is accepted by customers.

Company Profile

Jiangyin Eternal Heavy Machinery Co., Ltd

Jiangyin Eternal Heavy Industry Co.,Ltd. was established in 2008, it is National high-tech enterprise, innovative small and medium-sized enterprise. Till now our main products including all kinds of special steel forgings and heavy duty hydraulic cylinder.
Our special steel forgings include all kinds of alloy steel forging, mould die steel forging, stainless steel forgings etc.
They are made for forging roll, forging shaft, forging ring, forging sleeve, forging plate, forging round bar etc.
Its size is from OD150mm to OD1000mm, length up to 12000mm. They have been applicated on petroleum machinery, mining machinery, metallurgical equipment, power equipment, etc.
We also make all kinds of heavy duty hydraulic cylinders they are installed on hydraulic press, extrusion press, and all kinds construction machinery etc. Our hydraulic cylinder pressure could reach 3600 tons, max length could reach 12 meters.
Our company owns 2000 tons fast speed forging production line, heat treatment quenching and tempering furnace, middle-frequency induction surface hardening machine with 6 meter standing height, 500 tons straightening machine, all kinds of CNC lathe machine, CNC frame type machining center, all kinds of quality inspection equipment, such as mechanical property test machine, non-destructive test machine etc.
At present, our products have been exported to Europe, U.S.A, South Africa, Russian, Mexico, Brazil, Peru, Chile, Korea, Vietnam, Indonesia, Middel East etc more than 80 countries, our quality is accepted by customers. In future we would devote ourselves to deep research and new market, and we expect to make a better co-operation with our customer.
You are welcome to visit our company !

Why Choose Us?

Other Products

1. More than 20 years machining experience .
2. Rich experience on heat treatment , including normalizing , annealing , 
    quenching and tempering , high frequency surface hardening etc .
3. Complete production equipment from raw material to finished product 
4. Strict quality control , including raw material chemical specification test, non-destructive test , size inspection , hardness test etc .
5. More than 20 years exporging experience
6. Fast delivery time 

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FAQ

1. who are we?
 We are based in Jiangsu, China, start from 2008,sell to Domestic Market(36.00%),Eastern Europe(21.00%),Southeast
Asia(16.00%),South America(12.00%),North America(9.00%),Northern Europe(4.00%),South Asia(2.00%). There are total about 51-100 people in our office.
 
2. how can we guarantee quality? 
Always a pre-production sample before mass production; Always final Inspection before shipment; 

3.what can you buy from us? 
Shaft and Roller forgings. 

4. why should you buy from us not from other suppliers? 
We have rich experience on forging and heat treatment. 

5. what services can we provide?
Accepted Delivery Terms:FOB,CFR,CIF,EXW,FAS,CIP,FCA,CPT,DEQ,DDP,DDU,Express Delivery,DAF,DES; 
Accepted Payment Currency:USD,EUR,CNY; 
Accepted Payment Type: T/T,L/C,D/P D/A,Western Union; 
Language Spoken:English,Chinese,Portuguese,Russian