Hot rolling and rolling defects R. Chandramouli Associate Dean-Research ... plane – results in deflection of work roll ends, producing camber. Roll flattening: There is increase in radius of curvature of rolls due to the roll pressure which ... use stiffer rolls, namely roll material of high stiffness or elastic constant, we could avoid mill ...
roll bite and in a typical Cold Tandem Mill, work roll temperatures normally fall in the range of 55oC – 70oC with strip recoil temperatures and inter-stand strip temperature rarely exceeding 160 oC depending on product. Roll Bite temperatures in slower heavily drafted stands can peak in the region of 300oC, diminishing with the
FENN Rolling Mill machines are available in both 2Hi and 4Hi roll configurations, and mills may be either work roll driven, back-up roll driven, or a combination of both. On one end of the spectrum, 4Hi Rolling Mills with work rolls are offered as small as .500" (12.7mm) in diameter.
Feb 10, 2012· 6 High Reversible Cold Rolling Mill 1. CRM Complex6 High Reversible Cold Rolling Mill Training Manual0 ... (mm) Ra (micron) change Work roll 425 (max) 380 (min) 0.5 – 0.6 500 tonnes Intermediate rolls 490 (max) 440 (min) 0.6 – 0.7 1000 tonnes Back up rolls 1250 (max) 1050 (min) 0.6 – 0.8 10000 tonnes 5 ... The adjusting the intermediate ...
Apr 17, 1979· Method and apparatus for correcting camber in rolled metal workpiece ... following description will consider the housing stretch and workpiece and roll interface deformations as they apply in camber corrections. (In a 4-high mill, there would be two such interfaces on each side, one between the workpiece and the work roll and one between the ...
A two high mill with work roll diameter of 0.95m and 3.6m in length is selected to cold roll a strip of width 900mm with length of 0.5m and a thickness of 0.002m in a single pass. The dimensions of the roll shoulder are: Diameter 0.475m and length 0.2375m.
Home>Crusher and Mill >camber for 4 hi mill work roll. camber for 4 hi mill work roll. Rolling (metalworking) - Wikipedia, the free encyclopedia. A four-high mill has four rolls, two small and two large. ... HGC level) and mill disturbances (roll force, thermal camber).
• fast work roll bending systems • slide rolls in conjunction with mathematical models for roll ... Roughing Mill and X-ray measuring systems after the Finishing Mill. The configuration shown has ... 4 Four-high roughing stand 5 Cropping shears 6 Finishing mill 7 Cooling section 8 Coiler.
The camber control for reversing mills is a simplified task since the measurement of the ... Work Roll Lower Work Roll Figure 3: Camber definition. ... Figure 4: Camber measurement by means of a ...
When specifying work roll grades for wide strip mills, roll manufacturers ... breakage of work rolls and in particular for 4-Hi work rolls. .... removal, correct roll camber, prevention of cobbles etc., are necessary to prevent as many causes of local... More details » Get Price
2-High / 4-High Mills These mills may be converted for either 2-High or 4-High operation by the removal or insertion of work rolls. This permits great versatility of rolling capability on the same mill. When prodcution requirements are relatively small, a single mill of this type can be used for breakdown, rundown and finish rolling.
Camber and wedge compensation in hot strip rolling. ... Lower Work Roll. ... the lateral position of the product in the rolling mill and the camber (curvature of the product centerline seen in top ...
Aluminium rolling models: work roll camber. As many of you may know, we have developed a suite of process models for the aluminium rolling industry. These aluminium rolling models cover everything from ingot pre-heating to tension levelling.
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, .
The three high rolling mill utilizes the principle of passing the work back and forth to achieve a series of reductions. Unlike the two high reversing mill, the three high mill has three rolls that always spin in the same direction. An elevator mechanism lifts and lowers the work so that it can be passed back and forth through the rolls.
the pins to work. Beams with web thickness less than or equal to ¼": They ... Natural mill camber happens as a result of the roll-ing and cooling processes inherent in steel manufacturing. Toler-ances for natural mill camber are described in ASTM Specification A6. This standard gives a maximum natural mill camber or sweep
The work rolls in four-high strip mills and the rolls in two-high fine-section and wire mills are predominantly fitted with angular contact ball bearings as axial bearings (Figure 10). The chock arranged on the drive end is not axially located in the roll stand, but is guided on the roll neck by the axial bearing. Since the guidance forces are
dual diameter roll skinpass mill equipped with 2 kinds of work roll diameter is increasing. Likewise, in regard to the polishing method used for work rolls, a nylon brush roll method has been common up to now, but a high-pressure water spraying method (spraying pressure of .
formation of this strip camber, a force controlled edger is proposed, see Figure 1. Initially, the upper work roll is positioned with some clearance above the resting strip. In the following step, the required rotational speed is applied to the work roll, and the work roll is lowered to the final strip thickness.
Roll Camber Design for Cold Rolling Mills. Author links open overlay panel W.J. Edwards (Associate Manager) P ... The results suggested a smaller amplitude work-roll camber with a more involved shape than that developed for the wide cold mill (see Fig. 5d). ... COMMENTS AND CONCLUSIONS A 4-high mill stand rolling a given order has a ...
4-high cold rolling mill ANDRITZ high-capacity 4-high reduction rolling mills combine 150 years of experience with outstanding features in cold rolling for carbon steel, stainless steel, and other material. Product description. The 4-high mill is equipped with positive and negative work roll bending in order to influence the shape and the ...
atural mill camber exists in all steel shapes as a result of the roll-ing and cooling processes inherent in steel shape production. W-shapes are straightened at the mill to a curvature that is within the tolerances specified in ASTM Specification A6, which allows a maximum natural mill camber of 1/8 inch
Extensive tests were carried out on a 4-high Hille 100 rolling mill revamped for the purpose of research as a work roll crossing and shifting system. The confirmatory tests were performed by modifying an ordinary cold rolling mill to work roll crossing and shifting system. The specification for the test mill .
Jan 14, 2017· Elastic deformation of the mill takes place during rolling. Mill spring can be avoided, if stiffer rolls are used which means that the roll material is having high stiffness or elastic constant. Normally elastic constant for mills may range from 1 to 4 GNm-1. Roll elastic deformation can result into uneven strip thickness across.