how to calculate torque of roller machine

The contact force, between the reel and the surface rewind roller or roller as well as the torque applied to the core itself and the initial web tension will now finally control the density of the reel and tension in the web as it is rewound.

Other Units: Calculate engine horsepower after a quarter mile run using the ET method. Compute estimated increase in engine horsepower when an after market, racing upgrade or performance part has been installed with ET. Dyno correction factor. Factor corrects horsepower for normally aspirated internal combustion engine to a standard humidity,...

Input Horse Power, hp : Input Speed, N (RPM) : Torque, T (lbsft) : Calculator2. Known variables: Weight (lbs), Diameter (ft), Change in Speed (RPM), and Time to accelerate Total System (sec) In addition to the torque required to drive the load at a steady speed, torque is required to accelerate the load.

Torque required to provide a certain level of tension to a web is total tension measured across the web times roll radius. This means the torque driving the unwind shaft must. decrease at a linear ratio, relative to roll diameter, as an unwind roll decreases in size, through a machine run, to keep tension constant.

You may use this basic formula for more than just a two pulley setup. The RPM of the output pulley becomes the input RPM for the next stage of the drive. Done this way you can use this formula to solve for a multi pulley drive. Just remember that idlers do not change the output of the drive system. They are used to provide tension or to route the belt.

The basic torque distribution for a fastener is illustrated in Figure 4. The torque applied to a fastener is absorbed in three main areas. First, there is underhead friction, which may absorb 50 percent or more of the total torque. Thread friction absorbs as much as 40 percent of the applied torque.

What is Gear Ratio. The gear ratio is the ratio of the number of turns the output shaft makes when the input shaft turns once. In other words, the Gear ratio is the ratio between the number of teeth on two gears that are meshed together, or two sprockets connected with a common roller chain, or the circumferences of two pulleys connected with a drive belt.

Calculate the horsepower required for a milling operation based on the feed rate and depth of cut, which are used to determine the material removal rate (or metal removal rate). Also required is the unit power, which is a material property describing the amount of power required to cut that material.

On machines of new design where there is no way to measure input torque, nor to compare performance with an existing machine, torque and HP must be calculated. Since the final output of the machine will be mechanical, the starting point for calculations is to compute the mechanical output HP.

Starting torque The starting torque of a rolling bearing is defined as the frictional moment that must be overcome by the bearing to start rotating, at an ambient temperature of 20 to 30 °C (70 to 85 °F) .

Calculate the horsepower required for a turning operation based on the feed rate, depth of cut, and cut diameter, which will determine the material removal rate (or metal removal rate). Also required is the unit power, which is a material property describing the amount of power required to cut that material.

It is well known that there are sharp peaks (friction hills) in the specific roll pressure curves predicted by Sims formula and Цeликoв formula which result in large errors for hot rolling. In this...

Jan 25, 2018· Extreme roller torques and forces at the roller cassettes often lead to defects of the sheet, fracture of the working and supporting rollers, and failure of the straightening machine. In the present work, an approximate method is proposed for calculation of the optimal coldstraightening parameters of the steel sheet in a multiroller machine.

Roller Screw Calculation and Selection High Static and Dynamic Capacity. Transmission of the load from the nut to the roller screw shaft is provided through the planetary rollers' engagement. The number of contact points is larger, therefore the loadcarrying capacity of roller screws is much higher than that of ball screws. Wide Variety of Leads

How can we calculate the required torque to rotate 1200 kg of mass? I would like to calculate torque to rotate 1200 kg of mass which is attached in " dia shaft. Shaft is supported by 2 bearings ...

Sep 27, 2013· Torque is an important parameter in ensuring motors are well suited to their intended service. This article demonstrates how to calculate torque for a given motor or drive, and provides a brief introduction to motors and torque.

calculated. For this, the torque diagram (figure 1) for the engine should be referred to find the exact torque available at different intervals of engine speed. For example, in first gear, at 2000rpm, the torque available at engine output is, by putting this in equation (1); .

A: Two torques determine the web tension — the torque applied to the unwinding shaft and the roll's inertial torque. A constant shaft torque will create an increasing tension as the roll diameter decreases. Roll inertial torque develops during acceleration and deceleration, adding or subtracting from the brake or motor torque.