Coupling Dynamic Model and Control of Chatter in Cold ...

The dynamic model of 4-h mill, which couples with the rolling process model, the mill roll stand structure model, and the hydraulic servo system model, is built by analyzing the vibration process of cold rolling.

Torsional Vibration Control of the Main Drive System of a ...

In the main drive system of a rolling mill, shaft torsional vibration is often generated when a motor and a roll are connected with a flexible shaft. State feedback control can effectively suppress the torsional vibration of the main drive system of a rolling mill.

Nonlinear Coupling of Pitch and Roll Modes in Ship Motions ...

Oct 01, 2016· Rolling mill drive couplings. 1 October 2016. CMD Coupling experienced major successes in 2016 in Steel Industry. Attached picture : a Flexident Senior S870 gear coupling, for a rolling mill drive. Rated torque : 7 250 000 Nm, shaft diameter 820 mm, weight 19 300 kgs.

Tapered Hubs - Coupling CorpCoupling Corp

Jul 16, 2012· Inspection, though, would indicate the root cause was associated with the belt drive. In fact, the sheaves were worn so badly that the belts were riding in the bottom of the grooves. This situation approximately doubled the shaft bending stress. The drive shaft in Photo 6 was on a steel-mill elevator.

Series X Flexible Couplings - Benzlers

An explanation is given for the cause of extra forces generated at a square box coupling for mill drive and describes how these forces can be reduced. ... A shaft journal on the drive side was ...

Advanced roll forming troubleshooting - The FABRICATOR

CONSTRUCTION OF FORM-FLEX COUPLINGS ... Cutter-head drive 3.0 Jig drive 3.0 Maneuvering winch 2.0 ... Lumber industry Barker (drum type) 2.5 Edger feed 2.0 Live roll 2.0 Log conveyor 2.0 Off-bearing roll 2.0 Planer 2.0 Slab conveyor 2.0 Sorting table 1.5 Deburring machine 2.0 ...

Falk Steelflex Grid Couplings - Rexnord

Mill chatter in tandem cold rolling mill is a major rejection to the quality and production of the strips. In most mill vibration models, either the roll mass is usually limited to vibrate in vertical direction and vertical-horizontal directions, or the multiple rolls system is simplified to a single mass system. However, the torsional chatter is also a typical type of mill chatter, and the ...

Stability Analysis of a Nonlinear Coupled Vibration Model ...

Coupling is a component used to connect a drive shaft and a driven part, for example, a motor shaft and a ball screw for the purpose of transmitting the torque. The main roles of a coupling include the following: ・Connecting drive shafts of motors, etc. with driven shafts of ball screws etc. to transmit power.

Design and Selection of Universal Joints for Rolling Mills

Feb 25, 2017· This is a recent job I had to tackle. It's a large roller for a local industrial facility, and one end of the roller has a damaged shaft. It was previously repaired by someone else and that repair ...

Development of Hydraulic Type Gap-less Coupling for ...

Slipper couplings and drive shafts are used to transmit torque between gearbox and 3-high-roughing mill stands. The failure of both couplings occurred on the middle roll between the first stand and the gearbox, roll side, Fig. 2. 2. Failure of couplings

RENOLD AJAX MILL SPINDLE CATALOG (APRIL 2008)

Dec 31, 2015· In the study of electromechanical coupling vibration of mill main drive system, the influence of electrical system on the mechanical transmission is considered generally, however the research for the mechanism of electromechanical interaction is lacked. In order to research the electromechanical coupling resonance of main drive system on the F3 mill in a plant, the …

T&H Lemont - Model RU Universal Drive Roll Forming Machines

Roll Stabilization by Passive Anti-Roll Tanks Using an Improved Model of the Tank-Liquid Motion 19 August 2016 | Journal of Vibration and Control, Vol. 9, No. 7 Numerical simulations of cantilever beam response with saturation control and full modal coupling

design mill motor coupling bowl mill - Cleaning beeckaert

50 Why Specify FAST'S® Gear Couplings? The FAST'S design, with its lifetime All-Metal End Ring, provides up to 300% greater lubricant capacity.This means that longer periods between relubrication may be scheduled, and should a periodic

Rolling Mill Rolls | Xtek, Inc.

Investigation into the electromechanical coupling unstability of a rolling mill. ... of strip is caused by tension of the coiling and uncoiling and vertical force caused by vertical movement of the roll, ... which makes both the up and down drive mill vibrate violently in the vertical direction. ...

Failure Analysis Of Machine Shafts - Efficient Plant

Sep 17, 2001· A bed chain engages and extracts the bar. The bar is returned to the mandrel mill for another shell after being cooled in a water bath. Generally, 10 to 12 mandrel bars are used in the cycle for the mandrel mill rolling system. As the mandrel mill tube shell progresses toward the next step, it is weighed and measured by laser.

Rolling mill drive couplings | CMD Couplings

Koyo Engineering Journal English Edition 63E (2003) 49 1. Introduction In rolling mills for steel or nonferrous metals, the connection of the roll with the drive shaft (hereinafter referred to as DS) is usually performed by inserting the roll edge into the coupling cavity on the DS side. The roll section on the coupling side is generally ...

Rolling (metalworking) - Wikipedia

Xtek has manufactured Forged and Specialty Rolls for over 70 years. Special steel chemistries, coupled with unique and proprietary heat treating methods, have led to products with superior metallurgical properties and are the reason that Xtek is one of the leading suppliers of Forged and Specialty Rolls for many rolling mill applications.

DSL-1200-R1 COUPLINGS -

Select a coupling for reversing service to connect a gear drive low-speed shaft to a runout mill table roll . The electric motor rating is 37 kW at the base speed and the system peak torque at the coupling is estimated to be 17000 Nm . Coupling speed is 77 rpm at the motor base speed . The drive shaft diameter is 100 mm with a key of 28 mm x 16 ...

Roll System and Stock's Multi-parameter Coupling Dynamic ...

of spindle used to drive rolling mill rolls were wobbler couplings (Fig. 2) and slippers (Fig. 3). Wobblers are typically cast pods and are not sealed to prevent lubricant leakage. Heavy metal to metal contact produces high wear and high noise levels. A slipper coupling has the same rotating characteristics as a universal joint. In fact, a shaft

Ball Mill Maintenance & Installation Procedure

Several types of ball mill drives can be furnished, made up of various combinations of gearing, motors and transmission equipment. The correct combination to be selected takes into consideration power requirements, gear ratings, floor space, interference from other plant equipment and motor characteristics. The main types are described and illustrated on these pages. Motors considered are …

Ball Mill Drives - Mineral Processing & Metallurgy

Mar 20, 2017· The existence of rolling deformation area in the rolling mill system is the main characteristic which distinguishes the other machinery. In order to analyze the dynamic property of roll system's flexural deformation, it is necessary to consider the transverse periodic movement of stock in the rolling deformation area which is caused by the flexural deformation movement of roll system ...

Sliding bifurcation research of an electromechanical ...

Modern rolling practice can be attributed to the pioneering efforts of Henry Cort of Funtley Iron Mills, near Fareham, England. In 1783, a patent was issued to Henry Cort for his use of grooved rolls for rolling iron bars. With this new design, mills were able to produce 15 times more output per day than with a hammer. Although Cort was not the first to use grooved rolls, he was the first to ...