RU2012137658A - METHOD FOR PREPARING FOR OPERATION OF A WORKING ROLL OF A SHEET-ROLLING CART - Google Patents

Abstract

A method of preparing for operation a work roll of a sheet rolling mill, including grinding and subsequent texturing of its barrel with pulses of electric current passed through a dielectric fluid between the rotatable roller and electrodes, with the movement of electrodes along the barrel, characterized in that the pulse texturing with oscillatory movement of the electrodes along the barrel and with control of the washing efficiency, which should be at least 95%, is carried out until the roughness parameters are obtained; where χ, δ, α and β are constant coefficients that are set by the design features of the installation, and technological parameters, where I is the current strength, T is the time of one pulse, T is the time interval between two adjacent pulses.

Claims (1)

A method of preparing for operation a work roll of a sheet rolling mill, including grinding and subsequent texturing of its barrel with pulses of electric current passed through a dielectric fluid between the rotatable roller and electrodes, with the movement of electrodes along the barrel, characterized in that the pulse texturing with oscillatory movement of the electrodes along the barrel and with control of the washing efficiency, which should not be lower than 95%, is carried out until roughness parameters are obtained $$Ra=\chi +\delta \cdot Xr$$

; $$Pc=\alpha +\beta \cdot Xp$$

, where χ, δ, α and β are constant coefficients, which are determined by the design features of the installation, $$Xr=\frac{I^2}{T_{\mathrm{at}\mathrm{to}l}+T_{\mathrm{at}s\mathrm{to}l}}\cdot T_{\mathrm{at}\mathrm{to}l}$$

and $$Xp=\frac{\mathrm{one}}{T_{\mathrm{at}\mathrm{to}l}+T_{\mathrm{at}s\mathrm{to}l}}$$

- technological parameters, where I is the current strength, T _on is the time of one pulse, T _off is the time interval between two adjacent pulses.