Helical bending is available in a variety of metals and alloys, from steel and titanium to exotic materials. It can accurately bend heavy plate and structural sections into 3D shapes or helical profiles for architectural structures and feature steelwork on a wide variety of major structural projects. No matter how complex, you can send us spiral bending process drawings in various formats for the design, selection, and manufacture of helical bending machines.
Helical Spiral Bending Basics
AISC Curved Member Design Guide Section 2.2.7: Using strict definitions, a spiral is a two-dimensional multi radius curve, and a helix is a three-dimensional curve with an arc in one plane and a constant slope in a perpendicular plane. However, the terms are often used interchangeably in construction. A helix is the curve formed by bending about an axis on the surface of a cylinder or cone while rising at a constant angle. This curving process is often called sloped rolling or pitched rolling. The lack of cross-sectional rotation along the member axis distinguishes spiral bending from off-axis bending.
Helical spiral bending, a sophisticated technique, transcends conventional steel bending practices. This method, applicable to various structural steel sections and plates, yields mesmerizing results resembling the coiled shape of a flat hose or the heating coil of a cooking range. Referred to as “pitched rolling” or “sloped rolling,” true helical bending finds application in crafting curved steel stair elements, handrails, and innovative helical transfer conveyors.
The Essence of Helical Spiral Bending
Defining the Spiral Bend: Helical spiral bending is distinct in its ability to shape steel into coils reminiscent of “pancake coils.” To grasp the concept, envision a hose coiled flat on the ground or the spiral design of a heating coil.
Applications in Steel Fabrication
Curved Stair Stringers and Handrails: Helical rolling finds a natural fit in crafting curved steel stair stringers and handrails. Stringer members undergo meticulous checks for radius, pitch, and plumb to facilitate ease of fabrication. Handrails, alternatively, can be rolled to an approximate flat radius, providing a cost-effective solution that may require field fitting.
Challenges and Solutions in Helical Bending
- Pitch Considerations: Visualizing helical bending is akin to envisioning the top coil of a stove’s heating element. While diverse structural materials can undergo helical bending, certain materials and shapes exhibit varying degrees of ease. Pipes and tubing, in particular, have emerged as highly functional choices for applications demanding helical curves.
- Precision in Bending: Rolling pipes into a helix demands meticulous attention to detail. Incorrect calculations of the helix’s pitch can result in final pieces that deviate from project expectations. At BIT, we recognize the complexities associated with helical bending and emphasize precision in our calculations to ensure the final result aligns seamlessly with project requirements.
Industry Expertise and Innovation
BIT’s Expertise: BIT boasts a team of industry experts well-versed in the nuances of helical bending. With a wealth of experience, we navigate the challenges inherent in this bending technique, ensuring our clients receive not only precision but also innovative solutions that push the boundaries of what is achievable in steel fabrication.
In conclusion, helical spiral bending transcends the ordinary, unlocking a realm of design possibilities in steel fabrication. From crafting intricate stair elements to overcoming challenges in precision bending, this technique stands as a testament to innovation and expertise. As industry leaders, BIT remains committed to pushing the boundaries of what is achievable, offering clients not just Helical Bending Machines but works of art forged through precision and imagination.