| The working principle factor of cold push elbow machine
What factors will affect the shape of our cold push elbow machine? Through some research by related staff, the influence of billet, mandrel, temperature and advance rate on the radius of curvature of elbow, and the influence of section unroundness on wall thickness was studied, and the following conclusions were drawn:
D/Dp (elbow section diameter/billet outer diameter) = 1.33 ~ 1.40; B/A (long axis of mandre elliptic cross section/short axis of mandre elliptic cross section) = 1.06 ~ 1.10;
WB36 material heating temperature peak = 880 ~ 900℃, A335 P22 material heating temperature peak = 900 ~ 920℃; Propulsion rate ≤1000δ/2D (δ -- elbow wall thickness, D -- elbow cross section diameter).
The important parameters of the shape of cold push elbow machine are radius of curvature R, the cross section roundness and wall thickness perpendicular to the radius of curvature circle. The process parameters of the shape of push elbow have the following aspects: the material of push blank, wall thickness and outer diameter, the material and shape of mandrel head, heating temperature and its diffusion and propulsion rate.
What are the differences between cold elbow machine and hot elbow machine? Cold push elbow machine is also known as stainless steel elbow machine, in the past, stainless steel, alloy steel elbow to provide urgent, its emergence is to satisfy the production of stainless steel, alloy steel elbow necessary research and development, but also to meet the special requirements of the production of carbon steel elbow.
Cold push elbow machine and hot push elbow machine are also poor. In addition, cold push elbow machine does not need to accept intermediate frequency coil heating, so as to save electricity and energy saving health.
Push elbow time, to saw down the tube blank cutting, blanking tube blank shape is trapezoidal, but hot push elbow machine and cold push elbow machine is different in addition, hot push elbow machine blanking tube blank is rectangular.
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