Part II: Tube Shear Improvements

In the rapidly evolving automotive industry, where the push for advanced high-strength materials is stronger than ever, Lock Joint Tube (LJT) is committed to staying ahead. Understanding the need to process these robust materials efficiently, we've upgraded our equipment to match the industry's forward momentum.

Traditionally, our tube mills have relied on flying shears for cutting tubes to the desired length. This process, while effective, has its limitations, especially when dealing with the upper section of the tube. The action of punching into an unsupported shape often led to issues like dimpling and burring—small deformations that can affect the quality of the tube's end.

The automotive industry's shift towards lightweight, high-strength materials like HSLA (High Strength Low Alloy) and AHSS (Advanced High Strength Steel) brought new challenges to the forefront. These materials, characterized by their dual-phase microstructure, resulted in increased wear on our punch cut dies, leading to more frequent downtime and higher maintenance costs.

Recognizing the need for change, LJT invested in advanced technology—flying cold saws. This innovation, a scaled-down version of the technology used in our larger mills, is a game-changer. Not only do these saws minimize wear from cutting advanced high-strength materials, but they also deliver a significantly higher quality end product.

Here's how they make a difference:

The saw blades, made from high-speed steel or carbide, act more like milling tools than sheer cutters. This means a cleaner, more precise cut.

We can tailor the tooth profiles of these blades for specific material grades and tube shapes, ensuring optimal performance.

The saws are programmable, allowing us to set the perfect feeds and speeds for each job.

The combination of these features means we can provide ends with a machined-quality finish, elevating the standard of our products.

At LJT, our dedication to innovation ensures we not only keep pace with industry advancements but also offer our customers the best possible products. With these improvements in our tube shear process, we're more equipped than ever to meet the demands of the modern automotive industry.

By: Oliver Chmell

Facility Engineering Manager

Lock Joint Tube