From Forging To Heat Treatment: The Entire Process Of Crane Hook Manufacturing
From forging to heat treatment: the whole process of crane hook manufacturing is revealed Crane hooks are the core components of lifting equipment, carrying huge weight, and their manufacturing process directly affects the safety of operations. Today, we take you into the factory to reveal the complete manufacturing process from raw materials to finished products, and understand the precision technology behind the hook suspension system.
1. Raw material selection: high-strength alloy steel Hooks are usually made of alloy steels such as 20CrMnTi and 34CrMo. These materials have high strength, wear resistance and impact resistance, ensuring that they will not deform under heavy loads.
2. Forging: high-temperature shaping to create a prototype The steel billet is heated to more than 1200°C and repeatedly hammered by a forging press to initially form the curved structure of the hook. This process can optimize the internal structure of the metal and improve toughness.
3. Machining: Precision turning and drilling The forged blank is finely processed by CNC machine tools to ensure that the hook size and thread hole position of the hook meet the standards so as to accurately match the Hook Suspension system (such as the pulley block).
4. Heat treatment: Enhance hardness and toughness The hook needs to be quenched + tempered:
Quenching: Rapid cooling to increase surface hardness (HRC 45-50).
Tempering: Eliminate internal stress and enhance fracture resistance.
5. Surface treatment: Rust and wear resistance Galvanized, sprayed or blackened to prevent rust and extend service life.
6. Quality inspection: 100% non-destructive testing Each Crane Hooks must undergo:
Magnetic particle inspection (detect surface cracks).
Ultrasonic inspection (check internal defects).
Load test (1.5 times rated load test).
7. Assembly: Integrated Hook Suspension System Qualified hooks are assembled with pulleys, bearings, locks and other components to form a complete Hook Suspension unit to ensure stable operation.
