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Aug 01, 2019· A hot rolling operation is performed to alter the thickness of a metal by passing the material through a pair of rollers, forming a gap that is somewhat narrower than the thickness of the material. Therefore, the quality of the product is a function of the pressure applied by the rollers. However, in this process, a roll hunting force occurs in which the rolling force is irregularly changed ...

Obviously torque, speed and horsepower are important specs to evaluate when you're getting ready to purchase a vertical machining center, but there are a few other considerations that will be critical to the overall performance of your spindle and your overall satisfaction with the investment you make when purchasing a CNC vertical machining ...

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. Conversely, the torque driving the

The torque is equal to the product of total rolling load and the effective moment arm. Since there are two work rolls Torque Mt = 2P.a Consider two high roll mill as shown in the figure. For one revolution of the top roll the resultant rolling load P moves along the circumference of a circle equal to 2π.a Since there are two work rolls ...

Jul 01, 2009· A 7-stand finishing mill is shown in Fig. 2, together with the runout table and coiler.Typical values for strip thickness, temperature and speed are also given. A 4-high mill stand consists of two work rolls and two backup rolls supporting them, the former having a smaller diameter as seen in Fig. 2.The backup roll supports the work roll to mitigate the deflection caused by the deformation force.

A motor with around 1400 Horse Power is calculated needed for the designed task. Now we much select a Ball Mill that will draw this power.. The ball mill motor power requirement calculated above as 1400 HP is the power that must be applied at the mill drive in order to grind the tonnage of feed from one size distribution. The following shows how the size or select the matching mill required to ...

The Calculation of Roll Force and Torque in Hot Rolling Mills. Download citation | The Calculation of R. | Equations are derived for the normal roll pressure, specific roll load and torque in hot rolling mills, using the condition for plastic deformation in rolling derived by Orowan, together . Get Price And Support Online

Steel - Steel - Hot strip: The rolling of hot strip begins with a slab, which is inspected and, if necessary, surface cleaned either manually or by scarfing machines with oxyacetylene torches. The slabs are then pushed, or walked on their broadside, through gas-fired furnaces that have a hearth dimension of about 13 metres by 30 metres. In a pusher-type furnace, the slabs slide on water-cooled ...

precision analysis of the roll force and roll torque and their instabilities during the rolling process. In doing so, a coupling multi-variable simulation model for hot strip rolling was built using non-linear thermo-viscoplastic ﬁnite element method. Fluctua-tions of roll force and torque about the steady-state operating point are derived and

Railroad cars are used to move a wide range of materials across the United States. Hopper cars carry coal from the mines in Wyoming to coal-fired plants on the East Coast. Automobile transport cars move new vehicles from assembly plants to distribution centers across the country. Passenger cars carry commuters and ...

Given: Roll radius = 250 mm and rotational speed = 12 rev/min. The work material has a strength coefficient = 600 MPa and a strain exponent = 0.22. a) Sketch the operation and show any motion with arrow(s) b) Determine roll force, roll torque, and power required for two rollers.

1 = Nip roll velocity E = Elasticity of the material A = Cross sectional area of the material The larger the elasticity (E), the less likely the material is to stretch. For most values of EA, use TORQUE CONTROL For stretchy material, where E is small, speed control can approach being as good as torque control

30.0 hp: 22.4 kW: Input AC Voltage (3 Phase) - Low: 220 VAC: 220 VAC: Full Load Amps (3 Phase) - Low: 70 A: 70 A: Input AC Voltage (3 Phase) - High: 440 VAC: 440 VAC: Full Load Amps (3 Phase) - …

Maximum input torque continuous per spindle 1,000 inch lbs. 1,800 inch lbs. 4,800 inch lbs. 6,500 inch lbs. 25,000 inch lbs. Spindle RPH HP per spindle 480 RPM/ 7Y2 HP 400 RP,.M 110 HP 400 RPM /30 HP 500 RPM/ 50 HP 150 RPM /60 HP Maximum roll space: Diameter 3" …

The rolling mill was a 2-high/4-high experimental mill used as a 2-high mill, and was equipped with strain gage load cells and torque arms. The load cells are described in Reference 1. The torque arms (Figure 1) replaced the top and bottom drive shafts and utilized a similar amplFfier and recorder system.

Horsepower--In general, if the roll threading head can fit on the machine, there's enough horsepower. Where it is still questionable, a formula has been developed that can provide a minimum horsepower estimate. It's based on our ½-13 example using 4140 steel (28-34 Rc): (1.037 × 10-6) × T × P × D × S = horsepower Where: Constant = (1.037 ...

Jan 08, 2014· Design a new product to roll on an existing mill. Creating the rolling plan, calculating the power and roll loads, and analyzing the suitability of the equipment to provide the necessary power and torque and withstand the rolling loads. Extend the size range of products already rolled on an existing mill.

The rolling mill was a 2-high/4-high experimental mill used as a 2-high mill, and was equipped with strain gage load cells and torque arms. The load cells are described in Reference 1. The torque arms (Figure 1) replaced the top and bottom drive shafts and utilized a similar amplFfier and recorder system.

Roll stands holding pairs of rolls are grouped together into rolling mills that can quickly process metal, typically steel, into products such as structural steel (I-beams, angle stock, channel stock), bar stock, and rails. Most steel mills have rolling mill divisions that convert the semi-finished casting products into finished products.

Assume a helicopter blade is a thin rod, with a mass of 150.0 kg and a length of 8.00 m. To achieve an angular acceleration of 18.00 radians/s 2, what torque is required? Answer: The torque can be found using the torque formula, and the moment of inertia of a thin rod. The torque is: τ = Iα. τ = 14 400 N∙m. The torque required is 14 400 N∙m.

As the speed changes, the load torque remains constant and the horsepower changes linearly with speed. Constant torque loads cause motors to draw relatively high current at low speeds when compared to variable torque applications. This is why the same size drive may have a lower HP rating for Constant Torque applications.

Most engines use horsepower to describe how much work they can do in a given amount of time. The constant 1 horsepower equals 550 foot-pounds per second. In other words, 1 horsepower is the amount of work required to move a load of 550 pounds over 1 foot, in 1 second. Because horsepower, like wattage (no coincidence ...

Kennametal composite mill roll assemblies are designed for use in the high torque, low speed (10m/sec), intermediate stands of wire rod mills where traditional cast iron or PM steel rolls are used. These roll assemblies are supplied in two axial clamping systems — a traditional hydraulic clamp, and our new mechanical clamp that's easy to ...

The 7900 Pellet Mill is the workhorse and go-to pellet mill for many applications. Whether it is hard-running biomass, high-capacity animal feeds or anything in between, the 7900 is known for its dependability and versatility.

Jul 22, 2020· NAS-E: Remy Borg-Warner motor delivering more than 380 newton-meters (280 pound-feet) of torque and 214 brake horsepower. NAS-E Plus: Performance increases to 420 newton-meters (309 pound-feet) of ...

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