ZEHUACRANES company profile

Production Line

Henan Zehua Heavy Machinery Co., Ltd. operates a state-of-the-art, fully integrated production line that transforms raw steel into high-precision, reliable, and intelligent cranes. The entire manufacturing process is designed to meet international standards, with each stage carefully controlled to ensure exceptional quality, efficiency, and traceability.

1. Raw Material Inspection and Preparation

Every batch of steel plates and structural components undergoes rigorous incoming inspection, including chemical composition analysis and mechanical property testing. Only materials that meet strict quality criteria enter the production line. Steel coils are processed through a high-performance leveling machine equipped with 15 forged 60CrMo steel rollers (180mm diameter, 260kW power), ensuring perfectly flat plates for subsequent cutting and welding.

2. Laser Cutting and Blanking

Zehua's blanking workshop features advanced laser cutting technology as its core. A 31.5-meter large-scale laser plate cutting machine, sourced from a top global brand, performs one-time cutting of entire main girder side boards. This eliminates the need for multiple welding seams, significantly improving structural strength and aesthetic appearance. The machine can cut steel plates up to 40mm thick and handle complex groove cutting, chamfering, and intricate geometric shapes. For profile steel processing, an automatic loading laser cutting system ensures high efficiency and micron-level precision, reducing material waste and shortening production lead times.

3. Robotic Welding and Assembly

Zehua has deployed multiple intelligent welding robots across its assembly lines. These robotic systems ensure consistent, repeatable, and high-strength welds on crane girders, end carriages, and structural components. Each weld is monitored in real time, and parameters such as current, voltage, and travel speed are automatically adjusted to maintain optimal penetration and bead appearance. After welding, all critical joints undergo non-destructive testing (NDT), including ultrasonic and magnetic particle inspection, to verify zero internal defects.

4. Shot Blasting and Surface Preparation

To eliminate internal stresses induced by welding and cutting, every crane beam box passes through a large shot blasting machine with a chamber opening of 2500mm (width) × 3200mm (height) and a cleaning length of 33,000mm. Powered by 265kW and equipped with 16 high-velocity shot blasters, this machine uniformly impacts the entire surface of the workpiece, removing mill scale, rust, and welding spatter while creating a textured profile that maximizes paint adhesion. The shot blasting process is essential for extending crane service life, especially in corrosive environments such as ports, shipyards, and chemical plants.

OEM/ODM

Henan Zehua Heavy Machinery Co., Ltd. is not just a crane manufacturer; it is a strategic OEM/ODM partner for global brands, engineering firms, and industrial distributors. Leveraging its advanced production infrastructure and deep engineering expertise, Zehua offers flexible, confidential, and quality-assured manufacturing services tailored to each client's unique requirements.

OEM Services (Original Equipment Manufacturing)

Under OEM agreements, Zehua manufactures cranes exactly to the client's specifications, including custom designs, proprietary drawings, branded components, and specific performance parameters. Clients provide their own engineering designs, and Zehua's production team executes precision manufacturing, assembly, testing, and packaging. All intellectual property remains with the client, and strict non-disclosure agreements (NDAs) are signed to protect proprietary information. Zehua's OEM capabilities include:

• Full compliance with client-specified materials, dimensions, and tolerances

• Custom color schemes, logo application, and branded nameplates

• Private-label packaging and documentation

• Dedicated production lines for high-volume repeat orders

• Confidential handling of all technical data

R&D (Research and Development)

Innovation is the engine that drives Henan Zehua Heavy Machinery Co., Ltd. Despite being founded in 2020, the company has placed research and development at the very core of its business strategy. Zehua's R&D department is staffed by veteran engineers who previously worked at China's state‑owned crane factories, bringing with them more than 30 years of accumulated knowledge in mechanical design, structural analysis, control systems, and materials science. This rare combination of legacy expertise and modern technology allows Zehua to push the boundaries of what cranes can achieve.

R&D Organizational Structure

Zehua's R&D team is organized into four specialized groups:

• Mechanical Engineering Group: Focuses on structural design, finite element analysis (FEA), fatigue life prediction, lightweight optimization, and material selection. This group uses advanced simulation tools like ANSYS and SolidWorks Simulation to validate designs before physical prototyping.

• Electrical and Control Systems Group: Develops PLC programs, frequency converter integration, sensor networks, and safety logic circuits. This group is responsible for implementing anti-sway algorithms, collision avoidance systems, and synchronized multi-crane coordination.

• Intelligent and IoT Group: Designs cloud‑based remote monitoring platforms, predictive maintenance algorithms, and data analytics dashboards. This group enables Zehua's intelligent cranes to report real‑time operating parameters, receive over‑the‑air software updates, and alert service teams before failures occur.

• Applications and Testing Group: Conducts prototype testing, field validation, and failure analysis. This group also works closely with customers to document real‑world operating conditions and translate field feedback into design improvements.