Boom

There are three types of breakdown passes required in proper sequence to produce desired shape nearer to the rolled product: 1. Box Pass Series 2. Diamond-Square Series 3. …

specific type of mill i.e. slabbing and blooming mill, billet, bar and section mill, rod mill, plate mill, hot strip mill, single stand reversing and non-reversing cold mill, fully ... permissible reduction per pass and total roll force limit, mill speed, torque and power limit and available tension. The optimal reduction pattern that requires ...

Cast ingots, sometimes still hot, arrive at slabbing and blooming mills on railroad cars and are charged upright by a special crane into under-floor soaking pits. These are gas-fired rectangular chambers, about 5 metres deep, in which four to eight ingots are simultaneously heated to about 1,250° C (2,300° F). An ingot used for conversion into a slab can be 1.5 …

The 1100 blooming mill of our plant began operation in 1962. The roils of the blooming mill are driven by a reversing de motor (8500 kW, 0-60-90 rpm) through a universal …

rolling mills (with calibre rolls) could be replaced by continuous casting, as has been the case for primary (blooming-slabbing) mills. Present manufacturing trends indicate however that the...

Mill processes up to 110 metric tons of blooms per hour; New line entirely or partly dispenses with downstream processing steps . Acciaierie Venete S.p.A. has …

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Rolled from heavy slabs supplied by a slabbing mill or continuous caster or sometimes rolled directly from an ingot, plates vary greatly in dimensions. The largest mills can roll …

The selection of the proper size of input bloom to be rolled in Billet Mill. It depends upon the size of output requir ed, number of stands in the mill, speed and power of motors and capacity of shear to cut the minimum and maximum cross section. Generally, input bloom size for present day billet mill is taken around 300 mm x 300 mm.

Old roll-pass design of blooming mill. 0 ~ g#O VI F/. Fig/ I- lrg/,l I 34o 4,. Fig. 8. New roll-pass design of blooming mill. KSgGS, etc., in the first (vertical) and second (horizontal) stands. In so doing we measured the following quantities: roiling capacity, temperature of the workpiece after the second (horizontal) stand, and dimensions ...

The 1150 blooming mill at the Krasnyi Oktyabr Works was put into operation towards the end of the last cen- tury. In 1930-1937, the mill was modernized when the works …

The deformation behaviour of a hot rolled micro-alloyed steel bar of grade 38MnVS6 was examined using an FEM model during the initial passes in a blooming mill, as a function of three different ...

The roll pass design of the blooming mill (Fig. 1) is noted for its two ro!l bodies: A for initial and I3 for final rolling. This is due to the low lift of the tongue roll. Roiling in the mill is carried out in three main trains concur- rently: in the 750 heavy section-and-billet mill in which blooms are roiled into bars and round billets ...

2. Initial rolling conditions and roll pass design The workpiece is made of 42CrMo4 steel. The square cross section of the initial cast bloom has a size of 200mm×200mm with the corner radius of 8mm and the initial longitudinal length is 9000mm. Alloy steel round bar is designed to be rolled by the initial six passes of a …

Roll and pass design is critical for this rolling technology. There are usually three to five stands arranged in various ways, each taking one to five passes. Only one pass is made through the finishing stand, which controls the final dimension and surface.

and mechanisms of roll wear. In primary mills Nos. i and 2 of the Krivorozhstal' plant in- vestigators studied the magnitude and character of pass wear on the rolls of the 1250 and 1300 blooming mills in the width and thickness directions. Ingots weighing 8.0-8.5 tons are rolled on the 1250 mill (No.

This book discusses as well the different types of rolls for various rolling mills, including blooming, plate, sheet, sheet bar, small section, heavy product, skin passing, and cold rolling mills. The final chapter explains the purpose of roll pass design to ensure the maximum output at minimum cost as well as to reduce the roll wear to a minimum.

The library covers all different mill layouts from single stand blooming mills and old looping trains to modern continuous mills, 3-roll blocks and 2-high nishing blocks with conceivable symmetrical groove shapes and rolling sequences which can occur when rolling nishing rounds, squares, hexagons and ats in wire rod, bar or blooming mills.

Roll shop planning as per production plan for Blooming Mill. Draw Pass profiles with coordinates in Auto CAD as per drawing. Roll pass design …

using an FEM model during the initial passes in a blooming mill, as a function of three different pass schedules, roll groove depth, collar taper angle and corner radius. The simulations predicted the effective strain penetration, load, torque, fish tail billet end shapes, and metal flow behaviour at a chosen temperature, mill rpm and draft.

requirements of mill productivity. In general the calculation of a roll pass sequence aims at maximizing the productivity of the mill without violating any of the constraints due to …

3.8 Sizing Mill; 3.7 Super High Unit Mill (S-HUM) 3.6 Cantilever Mill; 3.5 Housingless Mill; 3.4 Convertible Mill (Horizontal & Vertical) 3.3 Conventional Mill Stands (Vertical & Horizontal) 3.2 Compact …

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Roll shop planning as per production plan for Blooming Mill. Draw Pass profiles with coordinates in Auto CAD as per drawing. Roll pass design for rolling new sections in mill and modification of old passes for improving quality of product. Handling over all Roll shop activities with zero delay time.

To prevent hitting of work piece to the roll table, which is about 7 to 10 times heavier than the roller of roll table. Bottom pressure is given in Blooming mills, by making difference in size of roll diameter to the extend of 5-10 mm. I11 case of Blooming mill, wherein each roll is driven separately by individual motor, the rpm of bottom motor is generally kept more …

Rods. Rod mills are similar to bar mills at the front end, but the finishing end is different. Rods have a smaller section (5.5 to 15 millimetres in diameter) and are always coiled, while bars are normally shipped in cut …

After each pass, the direction is reversed. The metal piece is turned through 90°, which keeps the section uniform and with fine grains. Nearly 25-30 passes are required to convert an ingot into a bloom. The arrangement of two-high rolling mill is shown in Fig. 2.9 (a). Type # 2. Three-High Rolling Mill:

Rods. Rod mills are similar to bar mills at the front end, but the finishing end is different. Rods have a smaller section (5.5 to 15 millimetres in diameter) and are always coiled, while bars are normally shipped in cut length. The final rolling in rod mills often takes place in a close-coupled set of 10 pairs of small rolls (200 and 150 ...