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What Is A Pipe Bending Spring?

Views:969 Author:Site Editor Publish Time:2022-08-22 16:22:40 Orgin:Site

It's quite bizarre if you have never realized how vital pipe bending is in various industries, be it the automotive or construction. The bent pipes are used for designing musical instruments, automobile components, hydraulic systems or constructing pipelines. At the center of all these is the indispensable equipment, which gets by the name pipe bending spring. In this expose, we dig into so many issues and how they correlate to the universe of pipe bending springs.

Disintegrated Features of Pipe Bending Springs

A pipe bending spring, forged from sturdy metal, is a vital support tool during the manual bending of tubes. These springs are considered to fall under the basic requirements for keeping the metallic structure intact from inside as well as outside, and normally used in pipe diameters ranging between 15mm up to 25mm. Pipe bending springs give precision in the bending process by steering clear of the distortion and creasing which are developed under pressure or strain.


Two Variants: Internal and External Springs

There can be two variants of pipe bending springs - internal and external - that have a completely different set of applications. Internal springs are the most stable for the larger tube size, with external springs being at their best when working with the smaller tubes - usually 15mm or less. The most important primary rule to be followed in the use of a spring for pipe bending is that it should apply at a minimum bend radius which is four times greater as compared to the outer diameter of the tube.

Aspects of Pipe Bending Spring

Pipe bending springs, much less intricate in their structure than the other forms of tube bending gear, are identified by two characteristics:

Tapered End: The pointed end is employed for internal bending, requiring a smaller size to fit into the tube. Conversely, for external bending, the pipe slides into the wider tapered end.

Ring End: Typically found in internal pipe bending springs, this feature facilitates the attachment of a wire or string for easy retrieval of the spring post-bending. External pipe bending springs, on the other hand, do not incorporate a ring end.

The Mechanics of Pipe Bending Springs

To effectively employ a pipe bending spring, start by identifying the copper pipe earmarked for bending. Longer copper tubes offer greater leverage, making them more manageable for the bending process. If the copper piece has a slight inward curve due to prior cutting with a cutter tool, deburring the edge is essential to ensure uniform bending.

A hacksaw or reamer can be used to trim the tube's end and widen it. Lubricate the tube with oil, such as olive oil, to ease the spring's removal after bending. Leave a portion of the spring outside the tube to facilitate retrieval. Bend the copper tube gently, avoiding excessive pressure to prevent creasing. Overbending slightly can aid in the spring's retrieval, and a screwdriver or tommy bar can assist in removing the spring.

Selecting the Ideal Pipe Bending Spring

If you're in the market for high-quality tube bending springs, several critical factors warrant consideration:

Yielding Strength: Opt for a pipe bending spring with a high yielding strength, typically crafted from durable steel or robust alloys. This ensures the spring retains its shape even after extensive twisting.

Corrosion Resistance: Look for springs with corrosion-resistant properties, often achieved through polishing. This not only prevents pitting and oxidation but also enhances the spring's efficiency and longevity.

Maintaining a sectional shape is crucial for high quality springs as it ensures stability and creates a smooth tubular structure, both internally and externally.

Exploring Different Pipe Bending Techniques

Apart from using springs for pipe bending there are methods employed in the fabrication process:

1. Mandrel Bending; This technique is perfect for tubes with diameters as it prevents them from collapsing.

2. Rotary Draw Bending; It is well suited for shaping pipes that have varying sectional areas and involves using interlocking dies.

3. Press Bending; An age method that's great for creating symmetrical parts in pipes without needing any lubrication.

4. Compression Bending; to draw bending but more cost effective this technique is limited to circular and hollow shapes.

5. Heat Induction; By subjecting pipes to temperatures through an induction coil bends can be achieved in pipes of diameters and sizes.

6. Hot Slab Bending; This approach involves filling the pipe with sand and mechanically shaping it by using pins, on a slab.

7. 3" Roll Bending; This technique works wonders when creating structures in pipes allowing bending of large tube structures.


In conclusion, this article  provides insights into the intricacies of pipe bending springs, how they work and the various techniques used in the field of tube bending. If you're looking for tube bending springs and metal products consider GL Metal. They are a trusted source offering a range of spring models to suit your needs. Get in touch with their team at GL Metal today for high quality metalworks and top notch pipe bending springs.