Turret Type Side Trimmer for NLMK Russia Project

Project Case Study: Xiangyang Jiade Machinery – Twin-Head Turret Side Trimmer for NLMK Russia

1. Project Overview

Project Name: NLMK Russia Cold-Rolled Coated Flat Steel Shearing Line Project

Location: Lipetsk, Russian Federation

End User: NLMK Group (One of the world's leading steel producers)

Equipment Supplier: Xiangyang Jiade Machinery

Equipment Type: Single-Housing twin-head turret side trimmer (Mono-block Dual-Cutter Rotary Shear)

Application: Edge Trimming of Cold-Rolled and Coated Steel Strips

Key Process Parameters:

· Material: Cold-Rolled Steel / Coated Steel (Zinc, Paint)

· Strip Width: 900 – 1,850 mm

· Strip Thickness: 1.2 – 6.0 mm

· Line Speed: Max. 500 m/min

Strip material: HC220Y, HC260Y, HC260LA, HX180YD, HX220YD, HX260YD, HX260LAD, S235JR, S235JRC, DC04EK, DD11, DD13, HX380LAD, S355MC, S275JR, S220GD, S250GD, S280GD, HC300LA,HC340LA, HX300LAD, HX340LAD, HX300YD

Max. Tensile Strength: ≤ 1000 MPa (for strip thickness ≤ 4.5 mm); ≤ 590 MPa (for strip thickness ≤ 6.0 mm)

Trimming Width: 10–35 mm per side (not less than 2× the strip thickness).

Residual Burr Height: ≤ 5% of the strip thickness after trimming.

· Commissioning Date: Q2 2025

2. Background & Challenges

As part of its strategy to upgrade high-speed cold rolling and finishing facilities, NLMK Russia required a state-of-the-art side trimming solution to replace its old shearing line. The primary challenge lay in processing a wide range of thicknesses (from thin 1.2mm to heavy 6.0mm) at a constant speed of 500 m/min.

Traditional single-head trimmers face significant downtime during blade changes—a critical issue when targeting high Overall Equipment Effectiveness (OEE). Furthermore, trimming coated steels at high speeds requires extreme precision to prevent coating flaking or "powdering" at the edges. NLMK needed a robust, high-precision machine capable of minimizing downtime while maintaining superior cut quality on both bare and coated surfaces.

3. Xiangyang Jiade Machinery Solution

To meet NLMK’s demand for high efficiency and versatility, Xiangyang Jiade Machinery engineered and supplied a Single-Housing Twin-Head Turret Side Trimmer. This advanced design integrates two sets of independently adjustable cutter heads within one rigid housing.

Core Technical Features:

· Twin-Head Turret Design: One head is positioned in the working zone, while the second remains on standby. This allows for automatic or semi-automatic indexing to switch heads in minutes, eliminating the need for manual blade changes during standard operations.

· Single-Housing Rigidity: Unlike double-housing designs, the mono-block structure offers superior anti-vibration performance at 500 m/min, ensuring consistent blade overlap and gap.

· Differential Tooling Setup: Head #1 is configured with knives optimized for heavy gauges (up to 6.0mm), while Head #2 is equipped with high-precision blades for thin gauges (down to 1.2mm) and coated materials.

· Integrated Scrap Chopper: Equipped with a high-torque scrap chopper synchronized with the main drive to handle thick scrap edges efficiently.

4. Performance Results & Technical Advantages

4.1 Near-Zero Downtime Blade Change

The turret design revolutionized the maintenance process. Instead of stopping the line for 45–60 minutes to change blades, operators simply index the turret.

· Result: Blade changeover time reduced to < 5 minutes (indexing only).

· Impact: Line availability increased significantly, contributing to a 15% boost in annual throughput.

4.2 Superior Cut Quality Across Wide Range

From 1.2mm thin sheets to 6.0mm structural grades, the machine maintained exceptional quality.

· Burrs: Consistently controlled below 0.05mm across all thicknesses.

· Coating Integrity: On galvanized and pre-painted strips, the edges remained smooth with zero coating delamination or powdering, crucial for corrosion resistance.

· Width Accuracy: Maintained within ±0.1mm, satisfying the stringent requirements for automotive and exposed applications.

4.3 High-Speed Stability

The robust mono-block housing effectively dampened vibrations at 500 m/min.

· Edge Straightness: Excellent control over "wavy edges" (sickle bend), ensuring perfect coil alignment during recoiling.

· Tool Life: Optimized cutting angles and cooling systems extended blade life by 20% compared to conventional setups.

5. Problems Solved for the Client

6. Client Comment

"The Single-Housing Twin-Head Turret Side Trimmer from Xiangyang Jiade Machinery has proven to be a game-changer for our Lipetsk facility. The ability to switch between heavy-duty and high-precision cutting modes in under five minutes keeps our 500 m/min line running at peak efficiency. The cut quality on our coated products is impeccable. We are impressed by the robustness and intelligent design of this Chinese equipment."

— Head of Maintenance, NLMK Rolling Division

7. Project Significance

This project marks a significant milestone for Xiangyang Jiade Machinery in the Eastern European market. Supplying a Twin-Head Turret Side Trimmer to a global steel giant like NLMK demonstrates the maturity of Chinese engineering in high-speed, high-precision metal processing. The success at Lipetsk serves as a benchmark for cold-rolled and coated steel processing lines worldwide, proving that advanced turret technology is the key to maximizing productivity in modern steel mills.

Built for Speed. Engineered for Precision.

Создано для скорости. Спроектировано для точности.

Xiangyang Jiade Machinery – Your Reliable Partner in Flat Steel Processing.

Сянъян Цзядэ Машинери – Ваш надежный партнер в обработке стали.

Xiangyang Jiade Machinery Co., Ltd.

www.xfjdmc.com

www.jiademachinery.com

robinc2007@126.com