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Depending on the shape, lifting hooks can be divided into single hooks and double hooks. The single hook is somewhat convenient to manufacture and use; the double hook is advantageous in bearing force and is light in weight. Single hook is used for smaller lifting capacity. When the lifting capacity is large, double hooks are often used in order to prevent the hook from being too heavy. Since the sheet hook of the casting crane matches the casting, a single hook is still used even if the lifting capacity is large.

The cross-sectional shapes of the hook body are round, square, trapezoidal and I-shaped. According to the stress analysis, the T-shaped section is particularly reasonable, but the forging process is complicated, while the trapezoidal section has reasonable stress and is easy to forge. Rectangular cross-sections can be used for piece-type hooks, but the load-bearing capacity of the cross-section cannot be fully utilized, so they are heavier. Circular cross-sections are only used for simple small hooks.

The forged hook tail usually uses a triangular thread, but the stress concentration is serious and it is easy to break at the crack. Therefore, trapezoidal or zigzag threads are mainly used for large hooks.

There are round holes in the piece-type hooks and hook tails hung on a single wire rope, and they are connected to other components with pins. The protruding nose part of the hook used for ship loading and unloading is to prevent the hook from hanging on the hatch.

The piece-type hook is fastened by riveting, and a gap is easily formed between the rivet and the pouring ladle. Countersunk head rivets are usually used, and there is no need to rivet the high-stress trunnion bend part (if the hook width is 2, then the 2/3c sector part) and the hook upper end pin. After riveting, the stacked plates at the front and upper ends of the hook should be welded. In order to prevent the hook from wearing at the trunnion part of the ladle, a metal wear plate should be installed on the upper side of the hook bend, so the metal material should be easy to disassemble and assemble. On the ladle, all parts subject to molten metal radiation and molten metal splashing should be provided with heat shields. The thickness of the piece hook is generally 50~60mm shorter than the trunnion length. According to the rated lifting capacity of the crane, 100t is about 150mm, 200t is about 200mm, and 400~500t is about 250mm.

Depending on the shape, lifting hooks can be divided into single hooks and double hooks. The single hook is somewhat convenient to manufacture and use; the double hook is advantageous in bearing force and is light in weight. Single hook is used for smaller lifting capacity. When the lifting capacity is large, double hooks are often used in order to prevent the hook from being too heavy. Since the sheet hook of the casting crane matches the casting, a single hook is still used even if the lifting capacity is large.

The cross-sectional shapes of the hook body are round, square, trapezoidal and I-shaped. According to the stress analysis, the T-shaped section is particularly reasonable, but the forging process is complicated, while the trapezoidal section has reasonable stress and is easy to forge. Rectangular cross-sections can be used for piece-type hooks, but the load-bearing capacity of the cross-section cannot be fully utilized, so they are heavier. Circular cross-sections are only used for simple small hooks.

The forged hook tail usually uses a triangular thread, but the stress concentration is serious and it is easy to break at the crack. Therefore, trapezoidal or zigzag threads are mainly used for large hooks.

There are round holes in the piece-type hooks and hook tails hung on a single wire rope, and they are connected to other components with pins. The protruding nose part of the hook used for ship loading and unloading is to prevent the hook from hanging on the hatch.

The piece-type hook is fastened by riveting, and a gap is easily formed between the rivet and the pouring ladle. Countersunk head rivets are usually used, and there is no need to rivet the high-stress trunnion bend part (if the hook width is 2, then the 2/3c sector part) and the hook upper end pin. After riveting, the stacked plates at the front and upper ends of the hook should be welded. In order to prevent the hook from wearing at the trunnion part of the ladle, a metal wear plate should be installed on the upper side of the hook bend, so the metal material should be easy to disassemble and assemble. On the ladle, all parts subject to molten metal radiation and molten metal splashing should be provided with heat shields. The thickness of the piece hook is generally 50~60mm shorter than the trunnion length. According to the rated lifting capacity of the crane, 100t is about 150mm, 200t is about 200mm, and 400~500t is about 250mm.