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The purpose of accurately controlling the tensile strength of the aluminum single wire can be achieved by properly coordinating the arrangement of the rod and the machine in the drawing process of the aluminum wire, or by changing the mode of the molding.
(1) Select aluminum rods with different tensile strengths according to the aluminum wire diameter. For aluminum rods of the same specifications, aluminum rods with large tensile strength are generally used for drawing aluminum wires having a large diameter. Because the rods are hard, aluminum wires have a large diameter and a small amount of deformation, and are easy to implement. On the contrary, the aluminum rods with lower strength have relatively good plasticity and are easy to draw on a large number of drawing dies, which can be used to pull small diameter aluminum wires. Having mastered this rule, it is convenient to accurately select aluminum rods of suitable strength according to the aluminum wire diameter, which can reduce the production of waste products and increase production efficiency.
(2) Choose different strength aluminum rods based on aluminum wire strength. For a wire drawing machine, the strength of the aluminum wire pulled out by the aluminum rod, which usually has a low strength, is also small without changing the mold. A bundle of rods A can be selected first. If the strength of the drawn aluminum wire is too high and the strength is less, then a B rod with a lower tensile strength than that of the A rod is selected. If the strength of the aluminum wire pulled out by the B rod meets the requirements, It is recommended to select the B rod. If the specifications of the aluminum wire are not changed, the next rod can be selected with the same strength as the B rod. This requires the inspector to clearly mark the tensile strength of each bar on the certificate and give it to the drawing staff. Our factory has classified according to the tensile strength of aluminum rods and marked with color scales as yellow, red 1, red 2, blue 1, blue 2 and other color rods, in order to facilitate the selection and operation of wire drawing workers.
(3) Distribute aluminum rods with different tensile strengths to different wire drawing machines. Different strength aluminum rods can be used on different wire drawing machines to obtain the same required strength aluminum wire. How to allocate it? For example, if the existing aluminum rod has several tensile strengths of 95-115MPa, the non-accumulative thirteen-die high-speed aluminum puller with a large number of drawing passes may have a relatively low tensile strength (95-105 MPa). Rods; old-fashioned ten-die aluminum pulling machines with recycled water are used to pull the bars with relatively high strength (105 to 110 MPa); old-style eight-mode aluminum pulling machines with circulating water have the highest tensile strength (110 to 115 MPa). The rods can be used to rationally consume different strength rods with different wire drawing machines. In the production of 500kVAC SR2720 Î 50 large section steel-cored aluminum stranded wire, due to the high quality requirements of aluminum wire, can only be used for high-speed aluminum drawing machine production of thirteen models, we use multiple high speed aluminum drawing machine at the same time, Different modes of moulding can be used, that is, different strength aluminum rods can be selected by changing the stretching pass. According to the same strength of the aluminum rod in the aluminum puller drum speed ratio and aluminum elongation factor allowable range of processing more, the greater the intensity, so you can use the machine with a lot of tensile stroke less tensile aluminum Rods; Aluminum rods with the same strength can also be obtained by pulling the aluminum rods with high strength at the machine with fewer stretching passes.
(1) Select aluminum rods with different tensile strengths according to the aluminum wire diameter. For aluminum rods of the same specifications, aluminum rods with large tensile strength are generally used for drawing aluminum wires having a large diameter. Because the rods are hard, aluminum wires have a large diameter and a small amount of deformation, and are easy to implement. On the contrary, the aluminum rods with lower strength have relatively good plasticity and are easy to draw on a large number of drawing dies, which can be used to pull small diameter aluminum wires. Having mastered this rule, it is convenient to accurately select aluminum rods of suitable strength according to the aluminum wire diameter, which can reduce the production of waste products and increase production efficiency.
(2) Choose different strength aluminum rods based on aluminum wire strength. For a wire drawing machine, the strength of the aluminum wire pulled out by the aluminum rod, which usually has a low strength, is also small without changing the mold. A bundle of rods A can be selected first. If the strength of the drawn aluminum wire is too high and the strength is less, then a B rod with a lower tensile strength than that of the A rod is selected. If the strength of the aluminum wire pulled out by the B rod meets the requirements, It is recommended to select the B rod. If the specifications of the aluminum wire are not changed, the next rod can be selected with the same strength as the B rod. This requires the inspector to clearly mark the tensile strength of each bar on the certificate and give it to the drawing staff. Our factory has classified according to the tensile strength of aluminum rods and marked with color scales as yellow, red 1, red 2, blue 1, blue 2 and other color rods, in order to facilitate the selection and operation of wire drawing workers.
(3) Distribute aluminum rods with different tensile strengths to different wire drawing machines. Different strength aluminum rods can be used on different wire drawing machines to obtain the same required strength aluminum wire. How to allocate it? For example, if the existing aluminum rod has several tensile strengths of 95-115MPa, the non-accumulative thirteen-die high-speed aluminum puller with a large number of drawing passes may have a relatively low tensile strength (95-105 MPa). Rods; old-fashioned ten-die aluminum pulling machines with recycled water are used to pull the bars with relatively high strength (105 to 110 MPa); old-style eight-mode aluminum pulling machines with circulating water have the highest tensile strength (110 to 115 MPa). The rods can be used to rationally consume different strength rods with different wire drawing machines. In the production of 500kVAC SR2720 Î 50 large section steel-cored aluminum stranded wire, due to the high quality requirements of aluminum wire, can only be used for high-speed aluminum drawing machine production of thirteen models, we use multiple high speed aluminum drawing machine at the same time, Different modes of moulding can be used, that is, different strength aluminum rods can be selected by changing the stretching pass. According to the same strength of the aluminum rod in the aluminum puller drum speed ratio and aluminum elongation factor allowable range of processing more, the greater the intensity, so you can use the machine with a lot of tensile stroke less tensile aluminum Rods; Aluminum rods with the same strength can also be obtained by pulling the aluminum rods with high strength at the machine with fewer stretching passes.
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