According to the theory of metal plastic deformation, the cold upsetting machine applies a certain pressure on the metal blank at room temperature to make it plastic deformation in the mold cavity, forming according to the specified shape and size. High quality metal materials with good "plastic deformation" must be selected, such as screw riveting steel, whose chemical composition and mechanical properties have strict standards.
Within the allowable range of the cold heading diameter of the cold heading machine, the position of the clamp (screw in or screw out) can be adjusted according to the required anchor head size, so as to obtain the appropriate reinforcement (wire) extension allowance; Rust shall be removed and straightened in the 120~130mm area of the cold heading part of the reinforcement (wire).
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