In the precision chain of industrial manufacturing, forgings act as the "industrial backbone," bearing core load-bearing components ranging from automobile engines to aerospace equipment. As key workpieces formed through the plastic deformation of metal billets, forgings eliminate internal porosity of metals and enhance mechanical properties—advantages that make them indispensable foundational components for high-end equipment manufacturing. With over a decade of dedication to the forging industry, Jiangsu Changli Equipment Manufacturing Co., Ltd. has built a matrix of seven core forging products, providing high-precision, high-reliability forging solutions for industries such as wind power, chemical engineering, shipbuilding, and automotive manufacturing. It interprets the quality strength of "Chinese Forging" through craftsmanship.
I. What Are Forgings? The "Reinforced Backbone" of Industrial Manufacturing
Forgings are industrial masterpieces reshaped through forging processes: by applying directional pressure to metal billets, they undergo plastic deformation at high or room temperature—this not only achieves the desired geometric shape but also significantly improves the material's strength, toughness, and wear resistance through grain reconstruction. Compared with castings, forgings completely eliminate internal voids and porosity defects, with mechanical properties enhanced by over 30%. This is why forgings remain the first choice for critical parts subjected to extreme loads, such as engine crankshafts and pressure vessel cylinders.
Classified by processing temperature, forgings can be divided into three categories: cold forging, warm forging, and hot forging. By structural characteristics, they include vertical-formed rotating body forgings, horizontal-formed long straight shaft forgings, and complex spatial curved forgings. Jiangsu Changli Equipment specializes in various types of forgings, and has developed unique technical advantages in seven core categories: forged rounds, stepped shafts, crankshafts, eccentric shafts, cylindrical forgings, flanges, and forged squares. Each product undergoes multiple precision processes to meet the most stringent industrial standards.
II. The Seven-Part Forging Symphony: Changli Equipment's Core Product Matrix
1. Forged Rounds: The "Basic Unit" of Precision Manufacturing
As the most widely used forging category, Changli Equipment's forged rounds are made of high-quality alloy steel. Through multiple forging processes, they cover a full range of diameters from 50mm to 800mm. Its unique isothermal forging technology improves the grain uniformity of forged rounds by 20%, making them widely applicable to key components such as aero-engine turbine disks and automotive transmission gears. A wind power equipment manufacturer used main shaft components processed from Changli's forged rounds—these components maintained stable mechanical properties at -30°C and had a service life 30% longer than the industry average.
2. Stepped Shafts: The "Power Bridge" of Transmission Systems
Stepped shafts are core components of mechanical transmission. Changli Equipment adopts a "die forging + precision turning" composite process to achieve precise transitions between different shaft sections. Its stepped shafts can reach a maximum length of 6 meters, with coaxiality error controlled within 0.05mm, making them suitable for high-precision transmission scenarios such as CNC machine tool spindles and ship propulsion systems. By optimizing forging flow lines with 3D simulation software, the product's fatigue strength is increased by 25% compared with traditional processes—successfully supporting high-end machining centers of a major domestic machine tool manufacturer.
3. Crankshafts: The "Beating Core" of Power Engines
As the "heart" of an engine, crankshafts bear complex alternating loads. Changli Equipment uses an integral forging process to avoid strength risks caused by segmental welding. Its crankshafts have a minimum eccentricity of 3mm and a maximum weight of 5 tons, covering full-range needs from automotive engines to large marine diesel engines. By introducing German spectral analyzers and magnetic particle inspection equipment, the company ensures zero-defect delivery of each crankshaft. After adoption by an automotive engine manufacturer, the failure rate dropped to below 0.03%.
4. Eccentric Shafts: The "Eccentric Dancers" of Special Machinery
Eccentric shafts realize reciprocating motion conversion through axis offset. Changli Equipment innovatively adopts a "four-jaw chuck + special fixture" composite processing method, controlling the eccentricity accuracy within 0.02mm. The products are widely used in special equipment such as vibrating screens and hydraulic motors. After a mining machinery enterprise used Changli's eccentric shafts, the equipment operation efficiency increased by 15%, and the maintenance cycle was doubled. The company can customize special eccentric structures according to customer needs, with a minimum delivery cycle of only 7 days.
5. Cylindrical Forgings: The "Safety Barrier" of Pressure Vessels
Changli Equipment's cylindrical forgings adopt an "integral forging + spinning forming" process, with a maximum inner diameter of 3 meters and wall thickness uniformity error of less than 2%—fully complying with the GB150 pressure vessel standard. The products are suitable for high-pressure equipment such as chemical reactors and nuclear power steam generators. Verified by third-party fatigue tests, they maintain intact sealing performance after 10,000 pressure cycles. A hydrogenation reactor made from Changli's cylindrical forgings by a petrochemical enterprise has operated safely for over 5 years without faults.
6. Flanges: The "Reliable Link" of Pipeline Connections
As key connectors in pipeline systems, Changli's flanges strictly comply with the national standard GB/T 9112-2010, covering a full range of specifications from DN15 to DN2000. The company has innovatively developed an "integral forging-welding" process, controlling the flatness error of the flange sealing surface within 0.01mm/m—maintaining excellent sealing performance under high-temperature and high-pressure conditions. Its tongue-and-groove flanges have been successfully applied to LNG transportation pipelines, achieving zero leakage in sealing performance at an ultra-low temperature of -162°C.
7. Forged Squares: The "Solid Foundation" of Structural Components
With stable cross-sectional performance, forged squares are the first choice for heavy machinery structural parts. Changli Equipment's forged squares have a side length range from 80mm to 500mm. The "multi-directional die forging" process is used to eliminate internal stress, increasing deformation resistance by 40% compared with traditional processes. The products are widely used in heavy-load structures such as crane booms and mining machinery frames. After adoption by a construction machinery manufacturer, the fracture failure rate of structural components decreased by 60%, and the overall equipment service life was extended by 5 years.
III. Craftsmanship Forging: The Quality Code of Changli Equipment
In the production workshop of Jiangsu Changli Equipment, "millimeter-level precision" is not just a slogan, but a standard integrated into every process. The company has introduced advanced equipment such as 2,500-ton quick forging hydraulic presses and CNC ring rolling machines, and established a full-process quality control system from raw material inspection to finished product delivery: each batch of steel undergoes spectral analysis to confirm its composition, key processes are equipped with online thickness measurement systems, and finished products must pass dual verification of ultrasonic flaw detection and mechanical property testing.
"Before our flanges leave the factory, they undergo 1,000 thermal cycle tests simulating the actual working conditions of customers," introduced Engineer Wang, the Quality Director. "Only products that can withstand extreme temperature changes from -40°C to 350°C without changing their sealing performance are eligible for Changli's qualification certificate." This strict quality standard has enabled the company to obtain ISO9001 Quality Management System Certification and PED Pressure Vessel Certification, with products exported to more than 20 countries and regions in Europe and Southeast Asia.
To meet the special needs of different industries, Changli Equipment has established a fast-response customized service system. A new energy enterprise urgently needed an eccentric shaft made of a special material—the technical team completed the process design within 48 hours and delivered the first batch of samples within 20 days, setting a new record for customized production in the industry. "Customers' urgent needs are our call to action," said Zhang Wei, General Manager. "Through the digital production scheduling system, we have shortened the delivery cycle of conventional products to 15 days, and the maximum cycle for customized products does not exceed 30 days."
IV. Forging the Future: Helping Chinese Equipment Go Global
With the in-depth advancement of the "Made in China 2025" strategy, the demand for high-end forgings is growing. Jiangsu Changli Equipment is accelerating its technological upgrading, building an intelligent forging workshop, and introducing digital twin technology to realize full-process visualized management and control. The company's independently developed "low-temperature forging process" has obtained 3 national patents, enabling the surface roughness of forgings to reach Ra0.8μm, realizing "near-net shaping" production, and increasing material utilization rate to over 92%.
In the wind power equipment field, Changli Equipment's large flanges have supported leading enterprises such as Goldwind and Mingyang Smart; in the nuclear power field, its special cylindrical forgings have obtained qualification certification from China General Nuclear Power Group (CGN); in the automotive field, it provides customized crankshaft solutions for new energy vehicle manufacturers such as BYD and NIO. "From traditional manufacturing to intelligent manufacturing, from domestic supporting to global supply, Changli Equipment has always used forgings as a link to connect Chinese manufacturing with global standards," said General Manager Zhang Wei with confidence.
Every forging is a perfect integration of metal and craftsmanship, and every forging mark records the footsteps of industrial progress. With its seven core forging products as the cornerstone, Jiangsu Changli Equipment Manufacturing Co., Ltd. uses the spirit of meticulous craftsmanship to forge a solid "backbone" for the high-quality development of China's equipment manufacturing industry, and writes a new chapter of "Chinese Intelligent Manufacturing" in the global forging market.
