big construction nails

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    big construction nails big construction nails

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  • The purchase of blade barbed rope also needs to consider the higher manual installation cost in the later period. Generally, customers only ask the price of blade barbed rope, and sometimes the installation cost is not taken into account in the budget, which is very unreasonable. Because the installation cost is not cheaper than the rope itself, sometimes even the blade rope and column combined. The blade stabbing rope needs a lot of manpower and material resources for installation. In general, the installation cost is also a relatively large expenditure item in the stabbing rope project.

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  • The drawing process of the waste product has a great influence on the function of the product. The general selection of about 90% of the larger total surface reduction rate (see area reduction rate) and the smaller pass surface reduction rate (about 23%), to ensure the endurance of the product. On the high strength spring steel wire, pulling should be controlled each time the temperature of the steel wire outlet is lower than 150℃, to prevent the steel wire due to strain aging and change the crack, which is the main drawback of steel wire waste.

    big construction nails

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  • During this process, each time the wire is pulled over, the surface hardens due to the high friction temperature. So basically every time you pull it you have to annealing it in the furnace. On the one hand, it is to reduce the surface hardness. On the other hand, during the process of wire pulling, only the surface is deformed, and the center is unchanged. So there’s a lot of stress inside. Therefore, it is necessary to rely on annealing to eliminate the internal stress, so that the wire becomes soft again to eliminate the stress before being drawn again.

    big construction nails

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    big construction nails big construction nails

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