Rolling Mill Equipment - MorgardshammarThus a single unit can replace any other in a group of roll stands. . The height of the pass line is always fixed, regardless of the roll gap and roll diameter.**how pass line is calculated in hot rolling mill**,fundamentals of roll cooling and control of flatness at . - Lechlerare dependent on drafting, steel grade, gauge and width. .. in relation to the roll centre datums and pass-line (X-Y coordinates) so that impingement .. a lower stress than the shorter zones which is measured by the sensors in that zone on.

Aug 1, 2018 . Eight optimization steps – pass schedule generation, work roll .. Roll profiles are estimated at the design stage and optimized at the start up stage or . motors, the mill line speed, the allowable overload ratio and time, top and base speeds of the payoff .. crown control concept for a 7-stand hot strip mill.

This mill is increasingly used for stainless steel strip rolling, either as in-line . black hot strip with highest pass reductions and simultaneous improvement of the.

Keywords: Hot rolling mill; AGC; Automatic Gauge Control; HGC; Hydraulic Gap. Control . The rolling force can be measured by a load cell or can be calculated from the pressure . parabolic shape, the center line being 0.2-1.2% thicker than the sides. . As the strip passes between the work rolls, the thickness is reduced.

Therefore, careful calculation of the process parameters and pass schedules is necessary. .. delivered world wide from the steel port, by train or by lorry.

in the end-less rolling line of the hot strip mill. .. under bottom back-up roll chocks will also work for the pass-line adjustment and the ski-head control especially for the ... 2) The calculated total shape can be divided into 0th, 1st, 2nd and 4th.

brief description of the rolling mill on which the roll speed and roll gap . severely limited the ability of conducting multi-pass hot rolling .. determined by roll experiments. For the ... tation and on-line monitoring devices has provided all sci-.

of hot strip agreed with measured ones from a seven-stand hot strip mill. Friction . pass 1 to 3, sticking friction dominated while from pass 4 to 7 slipping and sticking friction . θ denotes angle between chord dcand center line of the rolling.

May 18, 2015 . Types of pass Closed passes – The projection of one roll fits into a groove of the . Pass Design and Groove Details This calculation gives the . Spread When the steel is compressed in the rolls it will obviously move in.

Sep 24, 2009 . Heated up to 1200 – 1250 C for steel, 500 – 550 C for aluminum . The angle between the vertical lines is .. Roll separating force is the main goal in calculations in N/mm ... Hardness increases with the number of passes.

The complex process of hot rolling requires very accu- . mill, a cooling line, and a downcoiler. .. the calculation of the roll force in each pass the defor-.

Slab curvature compensation in a Hot Rolling Mill by means of . a series of passes. For each pass the unloaded roll . gap is calculated and adjusted using mechanical screws. . izontal rolling line; the upper working roll is dis- placed by an.

To investigate a correlation between the amount of wear and roll gap (pass height) . each stand in mill yard was measured at different roll tonnage. The pilot hot rolling test shows that variation of exit cross sectional area is almost linearly proportional to roll gap .. versible pilot rolling process and the roughing train of.

Elongation is achieved through the temper/skin pass mill. . These errors generate inaccuracies in mass flow/elongation calculations and thus reduced control . casting, hot rolling, pickling, galvinizing lines, tube/pipe mills, rod/bar and more.

Power is applied to the rolling mill by applying Torque to the rolls and by using roll strip . line of centers of the rolls. The ratio λ = [ a/Lp] = [a/√R.∆t] is used to calculate the moment arm 'a' λ =0.5 for hot rolling and 0.45 for cold rolling. . The design of roll pass is extremely complex and lot of experience is required for the.

the multi-pass continuous rolling process of Ф100mm 37Mn5 steel tube billet from 200mm×200mm . Keywords: hot continuous rolling, roll pass optimization, FEM simulation . Figure 1: The measured flow stress of 37Mn5 steel .. Alloy Steel Continuous Rolling Line at Fushun Special Co Ltd, Special Steel, 1998, 19. (2), p.

Select the . energy required, rolling mill design, rolling defects). 4. 4. . Drawing of . How pass line is calculated in hot rolling mill - Answers. How do you.

even-number passes in a reversing cold rolling mill. It is expected to . small lots of a variety of coils of high-grade steel or special steel in . line, the constraint from the flow being continued .. A trial calculation for the case of a mill having an.

Jan 8, 2014 . Roll Pass Design Part 1 Definitions Presented by Ansar Hussain Rizvi Ansar ... Formulae for calculating spread øn = new roll diameter ød = discard roll . Contact Angle The enclosed angle between a line from the point where the . Forward Slip If a piece of hot steel is placed in a press and reduced in.

how pass line is calculated in hot rolling mill,### Hot Rolling Mill Hydraulic Gap Control (HGC) thickness control .

Keywords: Hot rolling mill; AGC; Automatic Gauge Control; HGC; Hydraulic Gap. Control . The rolling force can be measured by a load cell or can be calculated from the pressure . parabolic shape, the center line being 0.2-1.2% thicker than the sides. . As the strip passes between the work rolls, the thickness is reduced.

Aug 1, 2018 . Eight optimization steps – pass schedule generation, work roll .. Roll profiles are estimated at the design stage and optimized at the start up stage or . motors, the mill line speed, the allowable overload ratio and time, top and base speeds of the payoff .. crown control concept for a 7-stand hot strip mill.

May 18, 2015 . Types of pass Closed passes – The projection of one roll fits into a groove of the . Pass Design and Groove Details This calculation gives the . Spread When the steel is compressed in the rolls it will obviously move in.

Jan 1, 2003 . Successful hot roll design is dominated by the calculations of some important ... mill, motor and the whole process of roll pass design. .. used new slip line fields for hot rolling to predict the deformation of the metal for a.

The back up roll diameter is determined by the crown/shape control model .. model, the pass schedule model, the roll slippage model, and the mill design model .. include Alexandra-Ford's equation for plate mills, Sim's equation for hot mills .. The constant crown ratio line is presented by the dashed line for each product.

Jan 1, 2003 . Successful hot roll design is dominated by the calculations of some important ... mill, motor and the whole process of roll pass design. .. used new slip line fields for hot rolling to predict the deformation of the metal for a.

For the development of a new spread formula for computer control of rod rolling process, the spread characteristics of hot rolling of mild steel rods in the . for the four types of passes: in the Square-Oval pass, it is assumed to be a straight line;.

Jan 8, 2014 . Roll Pass Design Part 1 Definitions Presented by Ansar Hussain Rizvi Ansar ... Formulae for calculating spread øn = new roll diameter ød = discard roll . Contact Angle The enclosed angle between a line from the point where the . Forward Slip If a piece of hot steel is placed in a press and reduced in.

May 2, 2004 . and validate the model referred to as the AISI Hot Strip Mill .. profile is calculated to determine total pass time and the total rolling time. ... actual mill temperatures (from pyrometers or on-line models) so that this data is plotted.

Sep 24, 2009 . Heated up to 1200 – 1250 C for steel, 500 – 550 C for aluminum . The angle between the vertical lines is .. Roll separating force is the main goal in calculations in N/mm ... Hardness increases with the number of passes.

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