1, early demolition of the steel bar straightening machine construction.
2, too little design reinforcement, less than the minimum reinforcement ratio or the board is too thin.
3, the surrounding constraints of the board, the four corners of the board negative moment structure ribs with too little.
4. Pre-embedded pipelines in the slab have too many reductions in cross-section or are not dense in the pipeline.
5, shrinkage: the amount of cement is too large, with fine sand, maintenance is not in time or time is too short, and the vibration is not dense and so on.
The use of the machine must be smooth, the feed chute should be straight, and it should be aligned with the center line of the guide tube, the straightening tube and the undercut hole. The motor must be provided with a reliable zero protection. According to the diameter of the straightening bar, the straightening block and the speed are selected. The bars that are straightened shorter than 2m or greater than 9mm in diameter should be carried out at low speed. Before the straightening block is fixed, the steel bar must not be penetrated before the protective cover is covered. It is forbidden to open the protective cover and adjust the gap during operation.
The steel bar must be put on the ring holder to be stable, and when the wire or the steel bar is off the frame, it must be shut down. The steel bars that have been straightened must be divided into small bundles according to specifications and number of roots. Scattered steel bars should be cleaned and stacked at any time.
Copper is a versatile and important material in various industries. It is a soft, malleable, and ductile metal that is a good conductor of electricity and heat. Copper has been used by humans for thousands of years, and it still plays a critical role in modern society.
One of the main advantages of copper is its excellent electrical conductivity. It is used extensively in electrical and electronics applications, such as wiring, power transmission, and printed circuit boards. Its thermal conductivity is also very high, making it suitable for heat exchangers and cooling systems.
Copper is also important in the construction industry. Its corrosion resistance, durability, and aesthetic appeal make it an ideal material for roofing, gutters, and plumbing systems. Copper is also used in architectural features such as decorative panels, wall cladding, and sculptures.
Copper is also an essential material in the manufacturing of various products. Its mechanical properties and workability make it ideal for manufacturing pipes, tubes, wires, and other hardware components. Copper alloys, such as brass and bronze, are used to make a wide range of products, including musical instruments, jewelry, and coins.
Moreover, copper is an environmentally friendly material. It is completely recyclable, and recycled copper can be used to manufacture new products without any loss of quality. Recycling copper also saves energy and reduces the need for mining, thereby conserving natural resources and reducing greenhouse gas emissions.
In conclusion, copper is a versatile material with many advantages. Its excellent electrical and thermal conductivity, durability, workability, and recyclability make it an essential material in various industries.
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