রোল গঠনের মেশিন is an efficient, high-speed manufacturing process used to produce long sheets of uniform cross-section parts. A coil of sheet metal is fed through a series of roller dies that gradually shape the material into the desired profile. roll forming machine have applications across industries from construction and infrastructure to automotive, aerospace, appliances and more.

Overview of Roll Forming Process

Roll forming machines use a continuous and automated process to manipulate coiled sheet metal into custom parts with repeated bends and forms. The raw material, typically steel, aluminum or other alloy coils, is fed into the rolling mill equipment. The material passes through a line of roller dies set up in sequential stations, each performing incremental shaping operations. The final output is a continuous length part with uniform cross-section along its length.

Benefits of roll forming include:

• High productivity and efficiency
• Consistency and precision in long length parts
• Versatility to form varied, complex profiles
• Lower tooling costs compared to other processes
• Minimal material waste

Roll formed sections find use in panels, enclosure frames, roofing, racking, highway products, furniture, appliance housings, automotive frames and more.

Roll Forming Equipment Types

এর বেশ কয়েকটি প্রকার রয়েছে রোল গঠনের মেশিন configurations including:

Table 1: Roll forming equipment types

Working Process of a Roll Forming Line

A typical inline roll forming system has these main components:

• Uncoiler: Decoils sheet metal from a cylindrical coil
• Feeding mechanism: Controls material speed into mill
• Forming sections: Series of roll stands shape material progressively
• Cutter: Shears finished parts to length
• Exit tables: Collects finished product

Additionally, punches, notchers, hole punching units, embossing stations can be integrated for secondary operations.

The forming process starts by loading a metal coil onto an uncoiler reel. The strip gets threaded through an initial set of guide rolls into the first set of forming rolls. As it passes through consecutive stands, the material shape gets further modified incrementally. The last few roller dies fine tune the final dimensional accuracy. Finally a flying cutoff saw shears the sections to desired length stacking them on the exit table.

Material Requirements

Roll formed parts can be produced from:

• Low carbon steel
• Stainless steel
• Aluminum
• Copper
• Brass

Other alloys and metal composites can also be roll formed with appropriate tooling design. Sheet thickness generally ranges from 0.15 mm to about 3 mm for common metals. The maximum coil width capacity for roll forming lines goes up to around 1500 mm.

Forming Capabilities

A wide range of uniform profile geometries can be shaped using rollers including:

• Basic arches, curved forms C-, Z-, hat-, U- sections
• Complex beads, ribs, fluted profiles
• Panels, highway rails, door frames
• Angles, tubes, rectangular ducting
• Open top and closed tubular sections

Advanced 3D roll forming allows asymmetrical forms with varying wall thicknesses along the parts length.

Design Considerations

To create an optimal roll formed profile, these aspects need evaluation:

• Product design: Building finite element models informs profile selection considering strength needs and functionality.
• Material type: Metallurgical properties determine forming limits, springback allowances needed.
• Tool design: Roller geometries, clearances, layout based on progressive incremental bending steps.
• Process parameters: Feeding rate, number of passes and stations, separating forces all affect quality.

With tighter tolerances needed, annealing and post processing may also be required. Expert roll forming companies collaborate with customers across design, prototyping, testing, and post-production stages to deliver custom roll formed components.

Key Factors in Roll Forming

Table 2: Factors influencing roll formed part quality

Suppliers of Roll Forming Equipment

There are roll forming machine manufacturers across geographies including:

Table 3: Major roll forming equipment suppliers

Entry level roll former prices start around $30,000 going up to $500,000 for fully automated high capacity equipment. Custom built production lines with multiple value-added processes, quality checks and part handling automation fetch higher prices.

When evaluating suppliers, productivity needs, line speeds, quick die changeover capability and overall equipment cost play key roles.

Roll Forming Line Installation

Roll forming equipment requires these preparations:

Table 4: Roll former installation needs

The machine bases have to be leveled and positioned so the roller axes are perfectly parallel. This precision alignment is vital for quality roll formed parts.

Operation of Roll Forming Machines

The typical workflow involves:

• Order planning – material procurement, production scheduling
• Coil loading onto uncoiler
• Threading sheet into guide system
• Setting forming parameters – line speed, punches etc. based on job
• Running production batch
• Part cutoff and exit
• Quality checks during operation
• Tool maintenance checks

For quick product changeovers preset recipes automate rapid machine reconfiguration saving time and material when switching jobs.

Maintenance of Roll Forming Equipment

Regular upkeep activities cover:

Table 5: Roll forming equipment maintenance

This ensures maximum production uptime and product quality consistency.

Choosing a রোল ফর্মিং মেশিন Supplier

Consider these factors when selecting roll forming equipment vendors:

Table 6: Roll former supplier selection criteria

Reputed manufacturers provide end-to-end support from design, prototyping, to post order assistance.

Pros and Cons of Roll Forming

Table 7: Advantages and limitations of roll forming process

If long lengths of the same profile are needed, roll forming excels over other processes due to its productivity and cost benefits.

Applications of Roll Formed Sections

Major application areas include:

• Building facades, roofs, highway rails
• Automotive and railway car frames
• HVAC ducting
• Large storage racks, containers
• Electrical, telecom enclosures
• Furniture and shelving
• Agricultural equipment, trailers
• Appliance housings

Essentially any high volume application with linear components of fixed cross-section can employ roll formed parts.

FAQ

Q: What thickness of sheet metal can be roll formed?

A: Standard roll forming lines can produce parts from metal thickness ranging between 0.3mm to about 3mm. Specialized heavy gauge lines go up to 8mm thickness.

Q: What alloys besides steel can be roll formed?

A: Aluminum, copper, brass and other ductile alloys can be roll formed with appropriate roller tooling design. Even flexible composites are possible for certain profiles.

Q: Can a flat sheet be roll formed into a pipe section?

A: Yes, specialized tube rolling mills with bending dies can continuously form flat strips into hollow tubular profiles.

Q: What tolerances are achievable in roll forming?

A: Roll formed parts normally achieve profile dimensional tolerances between +/- 0.5% to +/- 1% depending on metal properties and tooling precision.

Q: Is secondary processing like punching possible during roll forming?

A: Yes, modern roll lines integrate additional in-line processes like piercing, notching, slotting and embossing by incorporating special stations.

Q: How are roll forming machine suppliers compared?

A: Build quality, offered line speeds, level of process automation, tool design expertise, value additions possible, and after sales service are key competitive factors between roll former manufacturers.

know more Roll forming