Planetary Gearbox

  Bar bending   is extensively required in the construction of buildings and fabricators. Due to human’s inability to bend metals into desired shapes and angles, nowadays we need machines to produce quality products. Each and every work of humans is reduced by a machine. The bar bending machine is used for bending rods, strips, angles, and bars.  Bar Bending Machines are invented with an aim to reduce the manpower, time, and difficulties of the work. But still, the small construction workers prefer to bend the bars manually due to the high cost of machines, difficulty in handling, and Maintenance. Design & development of Planetary Gearbox for Bar Bending Machine The main components of  bar bending machines  are the Motor, Gearbox, Extended Shaft, hub, coupling, Belt Pulleys, etc. The  gearbox  used can be Helical, Planetary, Worm, etc. To develop the Gearbox for bar bending machines,  Top gear Transmissions  carried out in-depth research regarding the functioning, objectives, and l

The steps involved in the selection of planetary gearboxes are given below. The following parameters should be known before starting the selection of Planetary Gearbox        1.   Torque to be transmitted (output torque) 2. Motor Power (kW) 2. Input speed (RPM) 3. Output speed (RPM) 4. Operating condition (i.e. No of Start-ups per hour and it subject to impacts 5. Ambient temperature (°C) 6. Radial load on output and input shaft thrust load if any. The steps involved in the correct selection of Planetary Gearbox are as follow STEP 1: Select the reduction ratio The reduction ratio can be calculated as the input speed / output speed. If output torque is not known, then torque can be calculated STEP 2: Calculate the output Torque(Nm) Output torque = (P x 9546)/N Where P is Power in kW (multiply P with 0.746 if power is in HP) N is output speed (RPM) STEP 3: Find the service Factor Service factors are considered based on application type and working hours. See Table