In addition to bearing heavy weight, it must bear the impact load effect generated during lifting and braking. Taking the steel plate lifting pliers as an example, this is an important part of lifting machinery, with single hook, double hook two types. Single hook steel plate lifting pliers is a more commonly used hook, its structure is very simple, the use is more convenient, but the force surface is relatively small, the material is mostly forged with steel, the general rated weight does not exceed the standard tonnage. When the lifting weight of double hook steel plate pliers is large, the double hook lifting is used, and its force is uniform and symmetrical, and its characteristics can be fully utilized, and its material is mostly forged with steel.

　　The use of steel plate pliers for a long time will inevitably cause cracks in the hook. If cracks occur during the use of the steel plate hoist, it will cause serious personal equipment damage accidents. The common hidden parts of the steel plate hoist have a cross-section, people in the daily use process, these parts are prone to cracks, if the cracks have been generated and not found in time and continue to use, it can cause the hook suddenly brittle break, resulting in personal injury and equipment damage major accidents. The overall technical level of the steel plate pliers industry is not high, and the development of social economy has prompted customers to increase the demand for the high-tech content of steel plate pliers products, and the more traditional steel plate pliers products will gradually be eliminated by the industry market. With the arrival of knowledge economy, information society and changes in competitive factors, China's steel plate pliers industry is facing a crisis of international market competition, steel plate pliers technology to strengthen stamping technology, die casting technology and surface treatment technology and other aspects of the continuous development of the state.

Next: Can't the lifting tongs be used after they get rusty

Previous: PPD self-locking crosslift