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　　Secure both ends with ropes. In this way, the contact between the wire rope and the hook is changed from 1 to 3, and a wire rope with a length of about 4.2m is taken. The contact area between the wire rope and the hook is increased, the friction and wear between them is reduced, and the problem of one wire rope easily cutting into the surface of the hook is extended, the life of the hook and rigging is extended, and the life of the locking hook wire rope is also extended.

　　The special issue is when the work site is running under the premise of poor road surface, because the crane is transferred. This will cause more purpose friction between the wire rope and the hook, causing wear between the hook and the wire rope. Because the two ends of the wire rope are hung on the pull hooks on both sides, the wire rope is like a string of a huqin, which wears the vertical dangerous section of the hook very badly. In the case of bad road conditions, for example, the hook wear of the electric car crane is particularly severe during the lifting class in Chongqing. Sometimes it has to replace a wire rope that locks the hook in a few months. This wear of the hook is non-working wear. Three ways to reduce and prevent this wear are as follows:

　　Wear from the garage to the homework site or during the transfer between the homework site. Among them, the hook of the 5t7t8t10t car crane is relatively severe. From years of maintenance and supervision and inspection of car cranes, it was found that the hook of the car crane is very severe during operation (this wear refers to the car crane to complete various loading and unloading tasks. Because the driver of these tonnage car cranes always locks the hook in front of the cab during operation, and the two ends of the locked wire rope are hung in the two front traction hooks on the front bumper of the crane’s chassis.

　　That is, use a magnifying glass to observe carefully. If necessary, the main method of maintenance is generally visual measurement. Coloring method or flaw detection. The wear amount of dangerous sections can be measured by calipers or calipers; the inspection of the dental opening degree, compare the size measured by the calipers with the original size or the dental opening degree of the hook. Here is a simple and suitable method: when the new crane hook is just activated, a small hole is punched out on both sides of the hook body, and the interval between the two holes is measured and recorded. It is used to compare and compare with the size of the hook after deformation in the future to determine the size of the dental opening degree. Torsion deformation can be visually measured, or measured by the side of the steel ruler. If it is required to be accurate, you can use a marking ruler to detect on the platform. Items ⑤, ⑥, and ⑦ can all be visually measured or detected by calipers.

　　The above defects of the hook shall not be welded. Another thing to note is that the mandrel should be scrapped. ⑦ When the wear of the board hook mandrel reaches 5% of the original size, the core sleeve should be scrapped. ⑥ When the wear of the board hook bushing reaches 50% of the original size. Plastic deformation occurs in hazardous sections or the neck of the hook. The torsion deformation exceeds 10 degrees.

　　③ The tipping degree increases by 15% compared to the original height. Not greater than 5 of the original height.%; hooks made according to the row and the wear amount of dangerous sections are as follows: hooks made by GB10051.2. Should be greater than 10% of the original size. ① Cracks appear. The hook must be inspected to ensure safety. When any of the following situations are found, it should be scrapped immediately.

　　It is divided into two types: single hook and double hook; it can also be determined by different manufacturing processes, and the hook can be determined by different appearance. It is divided into three types: piece hook and cast hook forged hook. At present, common hooks are cast single hooks. Forged hooks are not allowed to be used in cranes to widely manufactured by low carbon steel and carbon alloy steel to solve the problem of crack resistance.

　　It must be faced with maintenance work. To this end, the detection and anti-wear method of car crane hooks serve as connecting cranes and heavy objects. When the lifting height limiter or hook locking device of the Chongqing lifting hook is ineffective or damaged, it is absolutely not allowed to be used again; as for the job without a license, the leader should be held accountable.

　　For example, use nylon rope or nylon hoisting belt used on marine ships instead of wire rope. The length of the lock hook wire rope L L is 1.35-1.45m. After multiple tests, it is found that if the wire rope is too long, the hook will be hung high, which will affect the driver's field of vision. If the wire rope is too short, it will be unfavorable when hooking, which will easily cause the person who hooks the hook to sprain. Generally speaking, if the driver has a higher figure, he will take a larger value, and if the driver has a smaller value. This is convenient and can take into account the driver's vision.

　　Secure both ends with ropes. In this way, the contact between the wire rope and the hook is changed from 1 to 3, and a wire rope with a length of about 4.2m is taken. The contact area between the wire rope and the hook is increased, the friction and wear between them is reduced, and the problem of one wire rope easily cutting into the surface of the hook is extended, the life of the hook and rigging is extended, and the life of the locking hook wire rope is also extended.

　　The special issue is when the work site is running under the premise of poor road surface, because the crane is transferred. This will cause more purpose friction between the wire rope and the hook, causing wear between the hook and the wire rope. Because the two ends of the wire rope are hung on the pull hooks on both sides, the wire rope is like a string of a huqin, which wears the vertical dangerous section of the hook very badly. In the case of bad road conditions, for example, the hook wear of the electric car crane is particularly severe during the lifting class in Chongqing. Sometimes it has to replace a wire rope that locks the hook in a few months. This wear of the hook is non-working wear. Three ways to reduce and prevent this wear are as follows:

　　Wear from the garage to the homework site or during the transfer between the homework site. Among them, the hook of the 5t7t8t10t car crane is relatively severe. From years of maintenance and supervision and inspection of car cranes, it was found that the hook of the car crane is very severe during operation (this wear refers to the car crane to complete various loading and unloading tasks. Because the driver of these tonnage car cranes always locks the hook in front of the cab during operation, and the two ends of the locked wire rope are hung in the two front traction hooks on the front bumper of the crane’s chassis.

　　That is, use a magnifying glass to observe carefully. If necessary, the main method of maintenance is generally visual measurement. Coloring method or flaw detection. The wear amount of dangerous sections can be measured by calipers or calipers; the inspection of the dental opening degree, compare the size measured by the calipers with the original size or the dental opening degree of the hook. Here is a simple and suitable method: when the new crane hook is just activated, a small hole is punched out on both sides of the hook body, and the interval between the two holes is measured and recorded. It is used to compare and compare with the size of the hook after deformation in the future to determine the size of the dental opening degree. Torsion deformation can be visually measured, or measured by the side of the steel ruler. If it is required to be accurate, you can use a marking ruler to detect on the platform. Items ⑤, ⑥, and ⑦ can all be visually measured or detected by calipers.

　　The above defects of the hook shall not be welded. Another thing to note is that the mandrel should be scrapped. ⑦ When the wear of the board hook mandrel reaches 5% of the original size, the core sleeve should be scrapped. ⑥ When the wear of the board hook bushing reaches 50% of the original size. Plastic deformation occurs in hazardous sections or the neck of the hook. The torsion deformation exceeds 10 degrees.

　　③ The tipping degree increases by 15% compared to the original height. Not greater than 5 of the original height.%; hooks made according to the row and the wear amount of dangerous sections are as follows: hooks made by GB10051.2. Should be greater than 10% of the original size. ① Cracks appear. The hook must be inspected to ensure safety. When any of the following situations are found, it should be scrapped immediately.

　　It is divided into two types: single hook and double hook; it can also be determined by different manufacturing processes, and the hook can be determined by different appearance. It is divided into three types: piece hook and cast hook forged hook. At present, common hooks are cast single hooks. Forged hooks are not allowed to be used in cranes to widely manufactured by low carbon steel and carbon alloy steel to solve the problem of crack resistance.

　　It must be faced with maintenance work. To this end, the detection and anti-wear method of car crane hooks serve as connecting cranes and heavy objects. When the lifting height limiter or hook locking device of the Chongqing lifting hook is ineffective or damaged, it is absolutely not allowed to be used again; as for the job without a license, the leader should be held accountable.

　　For example, use nylon rope or nylon hoisting belt used on marine ships instead of wire rope. The length of the lock hook wire rope L L is 1.35-1.45m. After multiple tests, it is found that if the wire rope is too long, the hook will be hung high, which will affect the driver's field of vision. If the wire rope is too short, it will be unfavorable when hooking, which will easily cause the person who hooks the hook to sprain. Generally speaking, if the driver has a higher figure, he will take a larger value, and if the driver has a smaller value. This is convenient and can take into account the driver's vision.