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    • crane machine > crane machine
    03 17, 2020
    Why crane are not allowed to pull diagonally?
    Why crane are not allowed to pull diagonally?

    The crane is not allowed to be carried out lifting diagonally, that is, the hoisting wire rope must pass through the center of gravity of the lifting object and keep vertical. But, why is it not allowed to lifting diagonally?1. Inclined lifting may cause overload.To lift an object from the ground, when lifting vertically, as long as the wire rope tension is equal to or slightly greater than the weight of the object, the heavy object can leave the ground.However, if pull diagonally, according to the principle of mechanics, the larger the angle when obliquely hanging, the greater the force on th ...

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    03 07, 2020
    Crane machine hook quality requirements
    Crane machine hook quality requirements

    Crane machine hook surface and internal quality requirements:* The surface of the hook should be smooth and clean, without cracks, acute angles, burrs, peeling and other defects;* There must be no defects such as cracks, white spots and inclusions that affect its safe use inside the hook;* Defects in lifting fitting hooks are not allowed to be repaired;* Dangerous section wear shall not exceed 10% of the original size;* The opening degree should meet the requirements of 5.2 in GB10051;* The twisting deformation of the lifting accessory hook, that is, the twisting angle of the hook body must no ...

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    12 14, 2019
    Ultrafine grain steel welding
    Ultrafine grain steel welding

    In order to obtain ultra-fine-grained steel, a variety of process methods have been developed: repeat heat treatment under the same rapid heating condition, mechanical grinding of metal powder, controlled rolling, controlled cooling, TMCP, composite TMCP method, etc. The ultrafine grains is the determinant of the excellent strength and toughness of ultrafine grain steels. Therefore, the difference between ultrafine grain steels and traditional steels is that their chemical composition cannot be used to predict strength of steel.Compared with traditional steels of the same strength, the main fe ...

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    10 24, 2019
    The function of crane machine maintenance
    The function of crane machine maintenance

    When the crane machine is in use, the moving parts will be worn, the connecting parts are loose, the oil is transformed, the metal structure is corroded, and then the performance and safety of the crane machine are reduced. To prevent and eliminate hidden dangers, ensure that the crane machine is in a good condition. Good maintenance can play the following roles:1. Ensure that the crane machines are normal and reliable, improve their utilization rate;2. Strengthen the connection of the structural parts of the crane machine to ensure that the operation and function of the electrical components ...

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    10 17, 2019
    New and practical crane machine
    New and practical crane machine

    With the continuous development of technology, crane machines are constantly developing and progressing. The crane machine adopts thin-walled profiles steels, reduces the structure of the joint welds, and improves the fatigue resistance. It adopts various high-strength and low-alloy steel materials to improve the load-carrying capacity, improve the stress conditions, reduce the self-weight and increase the appearance.The crane machine technology develops new transmission components and simplifies the mechanism. The "three-in-one" running mechanism combines the motor, reducer and brak ...

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