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　　Depending on the shape, the lifting hooks can be divided into single hooks and double hooks. Single hooks are more convenient to manufacture and use; double hooks are more favorable to stress and lighter in weight. Single hooks are used for smaller lifting weights. When the lifting weight is large, double hooks are often used in order not to make the hook too heavy. The plate hooks of the casting crane match the casting and use a single hook even if it is heavy.

　　The cross-sectional shapes of the hook body include round, square, trapezoidal and I-shaped. According to the stress analysis, the T-shaped cross-section is particularly reasonable, but the forging process is complex, and the trapezoidal cross-section is reasonable and easy to forge.

　　Triangular threads are usually used to forge the tail of the hook, but the stress is severely concentrated and it is easy to break in cracks. Therefore, large hooks mostly use trapezoidal or serrated threads.

　　There is a circular hole at the tail of the sheet hook and the hook hanging on a single wire rope, which is connected to the pin and other components. The hooks for ship loading and unloading are usually made into a general shape, and the protruding nose part is to prevent the hook from hanging on the hatch when lifted.

　　The sheet hook is fixed with riveted joints, and a gap is easily formed between the rivets and the poured molten steel bag. Fender rivets are usually used, and no riveting is required in the curved portion of the high stress trunnion (if the hook width is 2, then at the fan-shaped portion of 2/3c) and the upper end pin combination portion of the hook. After riveting, the front and upper ends of the hook should be welded. To prevent the hook from wearing on the trunnion of the water-clad steel, there should be a metal anti-wear plate on the upper side of the curved part of the hook, so metal objects should be easily disassembled and assembled. Insulation board is provided in the ladle bag to withstand the radiation of molten metal and the splash of molten metal. The thickness of the plate hook is generally 50~60 mm shorter than the trunnion.

　　Depending on the shape, the lifting hooks can be divided into single hooks and double hooks. Single hooks are more convenient to manufacture and use; double hooks are more favorable to stress and lighter in weight. Single hooks are used for smaller lifting weights. When the lifting weight is large, double hooks are often used in order not to make the hook too heavy. The plate hooks of the casting crane match the casting and use a single hook even if it is heavy.

　　The cross-sectional shapes of the hook body include round, square, trapezoidal and I-shaped. According to the stress analysis, the T-shaped cross-section is particularly reasonable, but the forging process is complex, and the trapezoidal cross-section is reasonable and easy to forge.

　　Triangular threads are usually used to forge the tail of the hook, but the stress is severely concentrated and it is easy to break in cracks. Therefore, large hooks mostly use trapezoidal or serrated threads.

　　There is a circular hole at the tail of the sheet hook and the hook hanging on a single wire rope, which is connected to the pin and other components. The hooks for ship loading and unloading are usually made into a general shape, and the protruding nose part is to prevent the hook from hanging on the hatch when lifted.

　　The sheet hook is fixed with riveted joints, and a gap is easily formed between the rivets and the poured molten steel bag. Fender rivets are usually used, and no riveting is required in the curved portion of the high stress trunnion (if the hook width is 2, then at the fan-shaped portion of 2/3c) and the upper end pin combination portion of the hook. After riveting, the front and upper ends of the hook should be welded. To prevent the hook from wearing on the trunnion of the water-clad steel, there should be a metal anti-wear plate on the upper side of the curved part of the hook, so metal objects should be easily disassembled and assembled. Insulation board is provided in the ladle bag to withstand the radiation of molten metal and the splash of molten metal. The thickness of the plate hook is generally 50~60 mm shorter than the trunnion.