Superior Machines Ltd. is a manufacturer of British made bruising and crimping mills, also continuous flow rolling mill/mixers. Supplied both mobile and fixed units, with PTO or electric drive. . Browse the Superior Machines Ltd. site for details of our animal feed equipment. Please contact us …

Mill Roll Inspection. No items found. Video Video 2 Brochure. ... – Bruise (soft area) detection. With advanced instrumentation and 20 dedicated sensors, ROLLMATE is the fastest system on the market (up to 4 times faster than other inspection systems with ultrasonic testing).

Illustration 42 shows a frequently observed "tongue type spall" of an ICDP hot strip mill work-roll, starting from a bruise crack and circling the roll until it finally spalls. These spalls are very similar to those in forged work-rolls in cold strip mills and they are found some times in back-up rolls as well. ... In hot rolling mills the ...

4) Internal defects from 60mm to the centre of the roll that have been created during the manufacturing process and can eventually propagate to the surface and cause spalls. 5) Soft-spots or "bruises" caused by annealing of the surface during cold mill rolling. On EC systems these defects are detected at the same time as the surface cracks.

One is the production line of centrifugal cast work rolls for hot strip mills and wide & heavy plate mills, which can produce all kinds of centrifugal rolls from φ400×2000mm to φ1600×10000mm, covering the material of ICDP, high chromium iron, high chromium steel, HSS, semi-HSS, with the annual production capacity of 35000 tons.

finishing mills, which will roll the steel in tandem with one another. The workhorse roughing mill has 135" wide rolls for rolling 'broadside' (as the first roughing mill is commonly called) to make a slab wider. A 5,000 hp motor drives 42"-diameter work-rolls through 28:1 …

Roll . Periodic pits or convex hulls appear on the surface, and severe roll marks cause the strip to pass through. 1The strip weld is too high or the cleaning is uneven, causing the sticking roller when rolling; 2The hard metal (bead, metal scrap, etc.) or dirt is stuck on the roller.

Peeling of the roll is a mill feature. Bruise or mechanical marking are local indentations on the roll barrel combined with heat-induced bruises, fire-cracks and pressure cracks within or outside the rolling width. These marks are predominantly seen on the work rolls from the rear finishing stands of the rolling mills.

The hot strip mill supplies coils for cold rolling mill, strip shearing and slitting units as well as a finished product for shipment directly to the customers. Most material is transported out of the mill area by an automated coil handling system to the storage aisle. ... and because an uneven tail can bruise work-roll surfaces or cause ...

Corrosion due to incorrect transportation of heavy plates - Heavy plate defects - Rolling defects. Cracking during 90 deg. bending - Hot rolled products - Rolling defects. Cracking through weld zone - Hot rolled products - Rolling defects. Cracks caused by shrinkage hole - Heavy plate defects - …

Furnace Tears. . A lamination-like defect that is transverse to the rolling direction. Reheat furnaces that use arms to push slabs through the furnace (as opposed to walking beam furnaces) can cause tears on the bottom side of the slabs. If the hot strip mill has a coil box, the furnace tears will be visible on the top surface of the coil.

Mills that had adopted fully HSS rolls in the earlier stands are moving their use also in the intermediate stands where the wear resistance is a crucial problem (Figure 1). In these stands the roll material has to guarantee a sufficient wear resistance to carry out the rolling program without generates any problem to the strip in terms of profile

Coastal Aluminum Rolling Mills, Inc. Corus Aluminium Rolled Products Jupiter Aluminum Corporation Kaiser Aluminum & Chemical Corporation Spectrulite Consortium, Inc. Logan Aluminum, Inc. McCook Metals L.L.C. Nichols Aluminum Ormet Corporation ... Bruise: See "Mark, Roll Bruise" ...

Handling damage bruises repeat at ID or OD, then fade out and change slightly in repeat distance as the coil pays off. The repeat distance and pattern gives clues about the defect's root cause. On repeating roll marks, the distance from mark to mark gives a clue as to which roll (at the mill or processing line) induced the mark.

Coastal Aluminum Rolling Mills, Inc. Corus Aluminium Rolled Products Jupiter Aluminum Corporation Kaiser Aluminum & Chemical Corporation Spectrulite Consortium, Inc. Logan Aluminum, Inc. McCook Metals L.L.C. Nichols Aluminum Ormet Corporation ... Bruise: See "Mark, Roll Bruise" ...

12 Electrode for narrow strip, Z mills or low roll volume texturing Eco EDT for aluminium& low volume steel strip production up to 1000 rolls per year ... Surface Inspection -To detect cracks and bruises in hot and cold rolling mill work and back-up rolls Sub-surface - To detect cracking, porosity, non metallic inclusions . Rollscan

PREET South America: Parque Industrial Star Interior 1040. CP 66600 Apodaca N.L., Mexico. Help Line: +52(81)14843338 Email: southamerica@preetgroup

What Is A Rolling Mill? In metalworking, rolling is a metal forming process in which metal stock is passed through one or more pairs of rolls to reduce the thickness and to make the thickness uniform. The concept is similar to the rolling of dough. Rolling is classified according to …

Roll is the main component of rolling mill, so the assembly technology of roll determines the technical level of rolling mill to a considerable extent and affects the quality of calendering products. Roll is not only an important content of rolling mill design, but also the main management object of organizing production. Therefore, the establishment of reasonable roll use management ...

10.Bruises. Features: Irregular scars on the outer surface of the steel pipe due to collision. ... during the rolling process, the metal enters the roll gap or the tube loses its stability, causing the tube wall to wrinkle. ... When the thickness of the capillary wall supplied by the piercer to the continuous rolling mill is small, the metal ...

3. Thermal stresses due to insufficient roll cooling 4. Severe bruising of rolls 5. Mill chatter, improper crowning and mechanical alignment problems 6. Sharp temperature gradient on the surface of the rolls (e.g.) near strip edge. 7. Pickling quality of hot rolled coil 8. Wrong grinding Operation 9. Hydrogen pickup from soluble oil used as a ...

's Rolling Mill Rolls Support the World Steel Industry. In 1961, became the first company in the world to adopt the "centrifugal casting" method for the production of mill rolls. It enables to produce a multi -layer composite rolls, which revolutionized mill roll material .

Internal defects from 60mm to the center of the roll that have been created during the manufacturing process, and can eventually propagate to the surface and cause spalls. Soft-spots or "bruises" caused by annealing of the surface during mill rolling. On EC systems these defects are detected at the same time as the surface cracks.

The sheet can whip/hit into the roll surface and mark it. As a result, the following coil produced through the hot strip mill will have these bruises on the head end. If the marks on the work rolls are light, the defect only bruises the next coils surface and eventually …

techniques into the roll shop of a heavy plate mill will be described exemplarily. In ... the thickness of the layer to be removed from the used roll after the rolling process will be determined precisely with the eddy current an ultrasonic ... histogram bruise roll length [mm] 0 …

The modification of the primary descaler is beneficial in reducing the roll bruises, extending the roll service life, increasing the mill productivity and improving the surface quality of finished ...

The reasons are as follows: the blank is not smooth, the rolling and coiling tension of the rolling mill is not properly controlled, and the adjustment of the leveling roll is unsuitable. (2) sloughing: the core is seriously deformed and the roll is not round. Cause: unsuitable tension in the process of curling; external force oppression.

The Roll Defect Management Process (RDMP) is a system which is designed to manage, track and evaluate all mill rolls found in use in the hot and cold production of flat rolled metal strip. The RDMP is capable of detection, distinction and differentiation of various defects found in the mill roll using a nondestructive inspection system for generating variable amplitude output voltage signals ...

The conventional rolling mill stand besides the roll stand consists of mill spindles, a pinion stand, a gear reducer and a motor. In case of constant pass line, the roll stand slides on the surface of the sole plate. Housing less mill stands are a pre-stressed stand which is more rigid than the conventional stands.

4 hi 1 stand #waterbury cold rolling mill 4/51-6" roll face 1" wr - 4" backup-motorized screwdowns -p.w. contact gauge. View Details Contact Seller Request Price Expand