Track Circle Bending and Stretch Bending

In fields such as intelligent warehousing, automated logistics, and robotics, demand for ring-shaped arc tracks and circle-bent profiles is increasing. Traditional straight profiles cannot meet the usage requirements of arc tracks, and processes such as circle bending and stretch bending are needed to machine aluminum profiles into specific curvatures. Aluminum profile circle bending and stretch bending is a process that uses professional stretch bending equipment to machine profiles into shapes such as arcs, semicircles, and full circles. The characteristics of stretch bending forming include uniform curvature, wrinkle-free surfaces, and excellent cross-section shape retention, making it especially suitable for track products with high requirements for curvature accuracy and appearance quality.

Shanghai Chuangsi Aluminum Co., Ltd. focuses on aluminum profile circle bending, stretch bending, and arc track customization, with professional stretch bending equipment and an experienced technical team. We can stretch-bend aluminum profiles into various irregular structures such as arcs, circles, and S-shapes according to customer needs. From extrusion and circle bending/stretch bending to CNC machining and surface treatment, the full process is delivered as one-stop service.

01 Quality Starts With Raw Materials

Produced from A00 primary aluminum ingot, containing no scrap aluminum, with uniform material and stable mechanical properties, ensuring the fatigue resistance of track profiles under arc bending conditions.

02 Precision Circle Bending and Stretch Bending Forming

Professional stretch bending equipment is used to stretch-bend aluminum profiles into irregular structures such as arcs, semicircles, full circles, and S-shapes. The characteristics of stretch bending forming include uniform curvature, wrinkle-free surfaces, and excellent cross-section shape retention. Curvature accuracy ≤0.5 degrees, circle bending error ±0.4mm, flatness 0.1mm-0.5mm.

03 Multi-Type Track Machining

We can machine various track types including RGV arc tracks, robot overhead rail circle bending, ring conveyor line tracks, express parcel climbing track arc sections, arc I-shaped aluminum alloy tracks, and special curvature custom bent rails.

04 One-Stop Delivery Service

From extrusion and circle bending/stretch bending to CNC machining and surface treatment, the full process is delivered as one-stop service, so customers only need to interface with one supplier. Custom curvatures, cross-section dimensions, and track lengths are supported based on drawings.

Circle bending/stretch bending vs. ordinary stretch bending:

Comparison item	Ordinary stretch bending	Track circle bending/stretch bending
Main purpose	Equipment frames, arc brackets	RGV arc tracks, robot overhead rails, ring conveyor lines
Curvature accuracy	General	≤0.5 degrees (high requirement)
Circle bending error	±1mm	±0.4mm
Splicing requirements	Relatively low	Splicing gap ≤0.5mm
Surface quality	General	No wrinkles, no scratches
Applicable scenarios	General structural components	High-precision track products

Processing capability parameters:

Item	Parameter/Description
Processing type	Aluminum profile circle bending/stretch bending, roll bending
Alloy material	6063-T5 / 6061-T6 / 6005A-T6
Circle bending form	Arc circle bending, semicircle bent rails, circular bent rails, S-shaped bent rails
Curvature accuracy	≤0.5°
Circle bending error	±0.4mm
Flatness	0.1mm-0.5mm
Extrusion length	Up to 20M
Processing equipment	Stretch bending machines, circle bending machines, CNC bending machines
Supporting machining	Mold development, extrusion, CNC machining
Surface treatment	Anodizing, hard anodizing
Splicing gap	≤0.5mm
Execution standards	GB/T 6892-2023, ISO9001
Production location	Qingpu, Shanghai

Main product types:

• RGV arc tracks / semicircle bent rails

• Robot overhead rail circle bending

• Ring conveyor line tracks

• Express parcel climbing track arc sections

• Arc I-shaped aluminum alloy tracks

• Special curvature custom bent rails

Typical application scenarios:

• Ring tracks for intelligent warehousing

• Bent rails for automated conveyor lines

• Robot overhead rail systems

• RGV arc tracks for rail-guided vehicles

• Arc tracks for electronic cyclic production lines

FAQ (Frequently Asked Questions)

Q1: What is the difference between track circle bending/stretch bending and ordinary stretch bending?

A: Track circle bending/stretch bending is dedicated to arc machining of track products such as RGV arc tracks, robot overhead rails, and ring conveyor lines, with requirements for curvature accuracy, splicing gap, and surface quality far higher than ordinary stretch bending. Ordinary stretch bending is mostly used for general structural components such as equipment frames and arc brackets, with relatively lower accuracy requirements. Track circle bending/stretch bending has a curvature accuracy of ≤0.5 degrees, circle bending error of ±0.4mm, and splicing gap of ≤0.5mm, ensuring cars or robots run smoothly without jamming on arc sections. We can undertake both types; for track products, the track circle bending/stretch bending solution is recommended.

Q2: Which types can track circle bending/stretch bending machine?

A: We can machine various track types including RGV arc tracks, robot overhead rail circle bending, ring conveyor line tracks, express parcel climbing track arc sections, arc I-shaped aluminum alloy tracks, and special curvature custom bent rails. Customers provide track routing drawings and curvature requirements, and we can evaluate and recommend the optimal circle bending/stretch bending solution.

Q3: What curvature accuracy can track circle bending/stretch bending achieve?

A: Through precise control of tension direction and force by CNC stretch bending equipment, curvature accuracy is ≤0.5 degrees, circle bending error is controlled within ±0.4mm, and flatness is 0.1mm-0.5mm. The stretch-bent track has uniform curvature, wrinkle-free surfaces, and small splicing gaps, so cars or robots run smoothly when passing through arc sections.

Q4: How to choose between 6063-T5, 6061-T6, and 6005A-T6 for track circle bending/stretch bending?

A: 6063-T5 has good formability and high surface finish, suitable for decorative tracks and light-load scenarios with high requirements for surface quality and circle bending performance; 6061-T6 has higher strength and better fatigue resistance, suitable for scenarios with requirements for structural strength and long-term operation stability such as RGV arc tracks and robot overhead rails; 6005A-T6 has balanced overall performance, combining good circle bending performance and strength, suitable for scenarios with requirements for both strength and circle bending such as intelligent warehousing ring tracks and express parcel climbing track arc sections. For heavy-load or high-speed running tracks, 6061-T6 or 6005A-T6 is recommended.

Q5: How is track circle bending/stretch bending priced?

A: Pricing is based on a combination of track type, curvature complexity, and profile cross-section. Standard arc tracks are priced per meter, while special curvature or full circular tracks require additional evaluation of working hours and process difficulty. We provide free sample evaluation and quotation; please contact Manager Du at 13611846009.

Q6: What is the minimum bending radius for track circle bending/stretch bending?

A: The minimum bending radius depends on the track profile cross-section dimensions, wall thickness, and material; generally RGV arc tracks ≥1000mm and ring conveyor line tracks ≥800mm are recommended. The smaller the turning radius, the higher the requirements for track circle bending accuracy and the RGV car steering system. We recommend using a larger turning radius as much as possible while meeting production line space requirements to ensure car running stability.

Q7: What are the MOQ and lead time for track circle bending/stretch bending?

A: The MOQ is 50kg, supporting small-batch sampling. The sample lead time is 5-7 days (conventional curvature) or 7-10 days (mold development required), and batch delivery is 7-15 days after sample confirmation. Because track circle bending/stretch bending requires ensuring arc accuracy and splicing quality, we recommend that customers confirm the curvature effect before batch production.