In a recent project, a producer of galvanized strip products utilized SEMAC to provide them with a Coil Cut Back Unit to improve their galvanizing operations. The unit is used to cut samples and remove non-prime material from a finished coil.
The system processes thin gauge coils weighing up to 42,000 pounds with a maximum width of 45 inches. SEMAC’s equipment scope of supply included an entry coil car with elevator, an expanding powered mandrel with a pivoting and powered hold-down roll, feed table, pinch roll set with a powered lower roll, and a rake style down-cut shear. SEMAC also provided a hydraulic power unit including directional and control valves, as well as, a complete electrical control system with an operator station.
The process begins with a coil being loaded by crane onto the coil car. The car elevates and transfers the coil loading it onto the expanding mandrel. Utilizing the powered mandrel, hold down roll, and feed table, the operator feeds the strip into the powered pinch roll set and then into the shear. After the designated amount of strip has been fed into the shear, the operator initiates the cutting sequence. All motions of the equipment can be manually controlled by the operator using pushbuttons and joystick controls.
The cutting operation can also be performed in a semi-automatic fashion. Once the strip is fed into the shear, the operator can enter the desired number of cuts and the length of each cut on the touch screen. After this is entered, all powered rollers (and the mandrel) rotate in unison to feed the strip while an encoder counts revolutions of the pinch roll to track the number of feet of strip being fed into the shear. Once the desired length is met, the shear makes a cut. This process gets repeated until the required number of cuts are made.
Overall, SEMAC helped our customer to reduce waste and improve their operations. To learn more about custom solutions like this, contact us.