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　　Depending on the shape, the lifting hooks can be divided into single hooks and double hooks. The manufacturing and use of single hooks is a bit convenient; the double hooks are favorable to bear force and light weight. Single hooks are used for smaller lifting weights. When lifting is large, double hooks are often used in order not to make the hook too heavy. Because the sheet hook of the casting crane matches the casting, a single hook is still used even if the lifting weight is large.

　　The cross-sectional shape of the hook body is round, square, trapezoidal and I-shaped. According to stress analysis, the T-shaped cross-section is particularly reasonable, but the forging process is complex, the trapezoidal cross-section has reasonable stress, and the forging is convenient. Rectangular cross-sections can be used for sheet hooks, and the bearing capacity of the cross-section cannot be fully utilized, so they are heavier. The circular cross-section is only used for simple small hooks.

　　The tail of the forged hook is usually triangular threads, but the stress is severely concentrated and it is easy to break in cracks. Therefore, trapezoidal or zigzag threads are mainly used for large hooks.

　　The sheet hook and hook hanging on a single wire rope have round holes at the tail, and are connected to other components by a pin shaft. The protruding nose-mounted part of the hook for ship loading and unloading is to prevent the hook from hanging when hanging.

　　The sheet hook is tightened with riveting, and a gap is easily formed between the rivet and the poured molten steel bag. Counterhead rivets are usually used, and do not need to be riveted to the high stress trunnion bend (if the hook width is 2, then the fan-shaped part of 2/3c) and the hook upper end pin. After riveting, the stacking plates at the front and upper ends of the hook should be welded. In order to prevent the hook from wearing in the trunnion part of the hanging steel, a metal anti-wear plate should be installed on the upper side of the bent part of the hook, so the metal material should be easily disassembled and assembled. On the ladle, heat insulation plates should be installed on all parts that are subject to molten metal radiation and molten metal splash. The thickness of the sheet hook is generally 50~60mm shorter than the length of the trunnion. According to the crane's rated lifting weight, 100t is about 150mm, 200t is about 200mm, and 400~500t is about 250mm.

　　Depending on the shape, the lifting hooks can be divided into single hooks and double hooks. The manufacturing and use of single hooks is a bit convenient; the double hooks are favorable to bear force and light weight. Single hooks are used for smaller lifting weights. When lifting is large, double hooks are often used in order not to make the hook too heavy. Because the sheet hook of the casting crane matches the casting, a single hook is still used even if the lifting weight is large.

　　The cross-sectional shape of the hook body is round, square, trapezoidal and I-shaped. According to stress analysis, the T-shaped cross-section is particularly reasonable, but the forging process is complex, the trapezoidal cross-section has reasonable stress, and the forging is convenient. Rectangular cross-sections can be used for sheet hooks, and the bearing capacity of the cross-section cannot be fully utilized, so they are heavier. The circular cross-section is only used for simple small hooks.

　　The tail of the forged hook is usually triangular threads, but the stress is severely concentrated and it is easy to break in cracks. Therefore, trapezoidal or zigzag threads are mainly used for large hooks.

　　The sheet hook and hook hanging on a single wire rope have round holes at the tail, and are connected to other components by a pin shaft. The protruding nose-mounted part of the hook for ship loading and unloading is to prevent the hook from hanging when hanging.

　　The sheet hook is tightened with riveting, and a gap is easily formed between the rivet and the poured molten steel bag. Counterhead rivets are usually used, and do not need to be riveted to the high stress trunnion bend (if the hook width is 2, then the fan-shaped part of 2/3c) and the hook upper end pin. After riveting, the stacking plates at the front and upper ends of the hook should be welded. In order to prevent the hook from wearing in the trunnion part of the hanging steel, a metal anti-wear plate should be installed on the upper side of the bent part of the hook, so the metal material should be easily disassembled and assembled. On the ladle, heat insulation plates should be installed on all parts that are subject to molten metal radiation and molten metal splash. The thickness of the sheet hook is generally 50~60mm shorter than the length of the trunnion. According to the crane's rated lifting weight, 100t is about 150mm, 200t is about 200mm, and 400~500t is about 250mm.