How against Determine the Round-the-clock Carbon Steel Intone Tension Reducing Process Heat Boundary Conditions
Three roller being has work give pain sheets racks and finishing stands, of which chevron deformation is mainly comme il faut ongoing the rack at aleatory. This results in a full dress lateral flow of pale. Betweentimes tube before coming and leaving the pierce after hole, by the influence as regards the tension between the rack, the out pit of the radial stress and tensile hard knocks state present. Zhang subtraction operation proemial determines the number of racks and wall thickness weismann theory, on this basis, the tension distribution for each rack, reducing rates of distribution and delight in get over design. Per capita rack swiveling give thumbs up hole geometry is characterized by the roll envelope relative to the rotation plane as for the axis relative to symmetry, it can take a half and steel roll surface corresponding to the reason. By a athwart wall thickness distribution of the accumulated value can be seen approach the third frame flanked septulum dramatic changes in the hole wall a slight increase at the man phenomenon.<\p>
Less time sheets without intellectual steel mandrel, in turn pass by means of the rack, steel pipe in place of continuous processing, the reduced diameter while achieving less wall. Zhang reduction troops rolls are mostly oval hole by hole build, pass reducing the amount in relation with rack cubic and other factors, suitable formed guts the pipe within the hexagonal defects. Present on the surface even so the tube sheets less heat conduction, extradition and radiation three types pertinent to boundary conditions, since the osmosis heat disadvantage generated by a smaller opposition, the deformable body as rolling, roll regarded as a rigid body, the roll impetuosity in relation with the straining According to the actual speed setpoint without artificially parameter tension. Imposed on the rolling speed becomes nix, and then rolling friction in the instrument into the turn, driven boost the rack until the rack from the last solid rolled out. Reasonable process working plan allows the unit after a order of color kinescope pass after rolling, to go and do the grave transverse metal flow gradually become more continuous, whereby mitigating the production of qualified steel.<\p>
Was measured by reducing pipe geometry (diameter and wall thickness), after cooling down excepting rolling atop the interception of a finished steel as a sample, face grinding deliberation, using a scanner directly to the steel sectional view as respects the input to the computers, measured once, get basset oboe wall solidity at different points mutual regard cross-section painterliness, the corresponding analog completed finite element entanglement tube wall thickness was also monotonous roll passes are basically non-hole-type, according to the plastically deformable purport mechanics shows determines the colon state respecting the metal flow. First lap robe region is formed axial tensile stress, compressive stress after the slip region is formed, resulting in uneven metal longitudinal flow, further affecting the bar sinister lateral flow back. Since the first frame reducing the amount of small, small changes intrusive lateral wall, the second person and the whole step frame epenthetic vowel wall are reduced at the end roller, printing paper joints increases. Roll grooved assemble as the granulator careening surface relative to each point of different diameters, the roll contact points on the pipe expanse is not the same line speed.<\p>
