Manual Leveling Machine (150mm Roll Diameter)

Product Introduction

In the fields of heavy-duty machining and steel structure manufacturing, the thickness and strength of sheet metal often pose significant challenges for leveling equipment. Designed for metal sheets ranging from 6 mm to 30 mm—and even thicker—we are proud to introduce this 150-mm-diameter heavy-duty manual leveling machine. As an industrial-grade machine specifically designed for “thick, hard, and heavy” sheet metal, it features an extra-large roller diameter design and a robust mechanical structure. This enables it to effortlessly handle the leveling of high-strength steel, hot-rolled sheets, and thick steel plates, making it the ideal choice for the heavy industry sector to eliminate internal stresses in sheet metal and achieve perfect flatness.

Technical Specifications

Applications

Shipbuilding Industry (Hull Plating, Decks, Bulkhead Plates)

• Marine steel plates are typically 25 mm or thicker and, after rolling, cutting, and welding, exhibit significant wave-like deformation and edge warping. The 150-roll leveling machine can level entire ship plates to within acceptable tolerances, providing flat base material for subsequent assembly and welding. When paired with a heavy-duty powered roller table, it can form a production line consisting of “loading → leveling → non-destructive testing → stacking.”

Pressure Vessel Manufacturing (Cylinder Plates, Head Plates)

• Steel for pressure vessels (such as Q345R and 15CrMoR) has extremely high flatness requirements, and the plates must be perfectly straight, especially before rolling. The 150-series machine can level vessel plates up to 30 mm thick, eliminating residual rolling stresses and ensuring that the ovality meets specifications after rolling.

Bridge Steel Structures (Load-bearing Plates, Orthotropic Plates)

• Thick plates used in bridges (Q370qE, Q420qE) are prone to angular deformation and twisting after cutting and welding. The large opening of the 150-roll leveling machine allows multi-layer assemblies with reinforcing plates or shims to pass through, enabling “assembly leveling”—a capability unavailable in smaller models.

Nuclear Power/Wind Power Structural Components

• Thick plates require 100% ultrasonic testing after leveling. The 150-roll leveling machine, combined with an exit powered roller table, can smoothly transport the leveled plates to the flaw detection station, avoiding damage from secondary lifting operations.

Selection Recommendations and Precautions

Thickness Limits: If your maximum plate thickness is less than 50 mm and the width does not exceed 2000 mm, the 120-roll model is sufficient; the 150-roll model may be overkill and represent a higher investment. The 150-roll model should only be considered when plates frequently exceed 50 mm in thickness, or when the material’s yield strength is >500 MPa and the thickness is >30 mm.

• Weight and Lifting: Due to the heavy weight of individual sheets processed by the 150-roll model, relying solely on manual feeding is impractical. We strongly recommend opting for a heavy-duty powered roller table and configuring a remote-controlled overhead crane for feeding; otherwise, the equipment’s full performance potential cannot be realized.

• Foundation Requirements: The total weight of a 150-roll leveling machine typically exceeds 25 tons, imposing strict requirements on the foundation. Detailed civil engineering drawings must be provided. The foundation depth is recommended to be ≥1.5 m, with concrete strength of C30 or higher, and positioning plates and anchor bolts must be embedded.

• Suitability of Manual Adjustment: Although adjustment is manual, due to the large plate thickness and wide roll gap adjustment range, it is recommended that operators possess basic knowledge of materials science and have undergone specialized training from the manufacturer. A quick thickness preset device is available as an optional accessory (allowing one-touch adjustment to the recommended roll gap based on sheet thickness) to improve efficiency.

• Safety Precautions: Ultra-thick sheets may generate significant impact and noise upon entry into the rolls. Safety barriers must be installed around the equipment, and the operator station must be equipped with an emergency stop pull-cord switch. Never place hands or tools in the roll gap.