Evotech Pvt. Ltd., Sister Concern of Evcon Technologies, Providers of Evcon Turbo TMT System
Flying Shear
  • Rotary dividing shear 1000/800/600 mm CRS complete with motor.
  • Entry and delivery trough Lubrication unit Piping, valves and fitting on the equipment.
Evcon Flying Shear Control comprises of:
  • DC motor for the Rotary dividing shear
  • Four quadrant Digital drive rated for 725 Amps for the DC motor
  • Encoders - Two nos.
  • Proximity switch for positioning - One no.
  • Hot metal detector - One no.
  • Control desk facility for Test, Speed variation commands and digital speed indicator.
The cables to the shear and Pinch roll shall have to be provided by you. Kindly note that we have quoted with:
  • Frame: Steel fabricated by M.I.G. welding duly stress relieved in oil fired furnace.
  • Pinions/Gears: EN353/354 integral case carburized and heat treated to 60+-2 HRC.
  • Blade Shafts: EN9 forged and heat treated from 260 to 280 BHN
  • Lubrication: the frame is provided with spray lines to the gears and the lubrication lines to bearings, including pumping unit complete.
Evcon Flying Shear
Functional Description
The shear will be located after the finishing mill and before the cooling bed. One no. encoder shall be installed at the motor/pinion stand of the finishing stand. This shall sense the exact RPM of the finishing roll. The mill operator shall decide the length of the bar to be cut, the exact roll dressed and shall feed the data to the MMI (Man Machine Interface).

One no. H.M.D. (Hot Metal Detector) is installed after the finishing mill, which shall see the incoming bar and give signal to the shear. The shear initiates the cut after the time interval T, corrected for the dressed diameter and dip in the motor rpm on load.

V Velocity of the bar is 3.142 x D x N
D dressed roll dia, fed into the MMI
N actual motor RPM, data given by the finishing mill encoder. This data is correct for the dip in the motor rpm on load for improved accuracy.
S Distance from the HMD to the shear.
T Time delay for initiating cut = V/S

After the first cut, the shear cuts at regular intervals determined by the length of the feed to the MMI.

The data to be fed to the MMI is:
  • Roll diameter (after each dressing)
  • Distance to the HMD to the shear
  • Length of the bar required to be cut.
Evcon Flying Shear Field devices are:
  • Hot metal detector
  • Encoder on the finishing mill. (if the finish bar is generated from more than one then encoders need to be installed at each drive. The additional encoders shall be your scope.)
  • Proximity Switch mounted on the shear coupling for position control
  • Flow switch for lubrication oil monitoring One pitch roll driven by a DC motor is installed at the exit of quenching line, just the shear, for maintaining the constant quenching time
  • Drawing the short back end.
  • Improving the straightness of the bars in case of small diameters.
  • The DC motor is provided by a techno generator, which is synchronized with the speed.