Reducing rolling mills are specially designed to reduce round, metal sheathed tubular elements. They contain a number of pairs of driven rolls, mounted in a V-shaped bearing box assembly.
Sintered carbide rolls(Cr12,W18Cr4V) are recommended for annual production more than one million meters of hard material. The life can be 5~10 times than tool steel.
12 stations can process thicker tubes and higher reduction rates than 8 stations.
The min. length of tube:110mm
Tube diameter after compressing: Φ5.2mm～Φ19.0mm
The max. diameter before compressing: 21mm
After compressing, the straightness can reach 1:300, and the roundness can reach 0.07mm.
The minimum safety distance between tubes should be 500mm, or one third of the element length.
Machine stand with motors and gear boxes
Bearing box assembled with rolls(high speed steel or tungsten carbide)
Simple type of straightening device
|Power supply||Triphase 380V 50Hz 6.10KW||Triphase 380V 50Hz 9.3KW||Triphase 380V 50Hz 12.3KW|
|Number of rollers||Eight stations||Twelve stations||Sixteen stations|
|diameter reduction rate||16%||17~21%|