Steel Ball Skew Rolling Mill

A: Roll wear depends on steel grade, temperature consistency, and ball diameter. Standard 5CrMnMo forged rolls process between 1500 and 3000 tons of steel balls before requiring re-profiling on a CNC lathe. Roll dies can typically be re-turned 2 to 3 times depending on profile depth.

A: Ball roundness relies on roll pass geometry, axial roll angle setting, and consistent bar temperature entering the mill. Machines utilize synchronized twin-roll adjustments with digital position readouts, ensuring the bar is continuously pinched and sheared without flash formation or ovality.

A: Yes. A single mill frame can produce a range of ball sizes (for example, Dia 40mm to Dia 80mm) by swapping the roll dies, adjusters, and guide plates. Changing a complete roll set and re-aligning the center angle typically takes 2 to 4 hours.

A: Bar stock must be uniformly heated via medium-frequency induction furnace to 950 deg C - 1100 deg C. If the bar drops below 900 deg C, rolling forces increase significantly, accelerating roll wear and risking machine stalling. An inline pyrometer feedback system controls the bar feeding speed automatically.

A: Skew rolling reduces labor requirements by up to 70% through automated bar feeding and continuous output. Material yield increases because the process eliminates flash waste generated in die-forging hammers, achieving raw material utilization rates above 97%.

A: Total installed power depends on the machine size and the induction heating furnace. For a mid-range Dia 40mm - 80mm line (SKM-80), the total connected load ranges from 600 kW to 1000 kW, with the induction furnace accounting for approximately 70% - 80% of total energy consumption.