About Us

MINEVIK Machinery is a leading and pioneering enterprise with the most advanced international level in R&D, manufacturing and selling of large-scale crushing & screening plants and beneficiation plants.

large-scale crushing & screening plants and beneficiation plants.

All of our equipment have got ISO international quality system certification, European Union CE certification and Russian GOST certification.

  • In central China-Zhengzhou, covering 140 thousand square meters
  • Win-win cooperation and create more value to customers
  • Exported large quantities and high-end mobile crushing plant and milling equipments to Russia, Kazakhstan, Indonesia, Ecuador, South Africa, Nigeria, Turkey more than 100 countries .

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Our Products

AS a leading global manufacturer of crushing and milling equipment, we offer including quarry, aggregate, grinding production and complete stone crushing plant. We also supply individual crushers and mills as well as spare parts of them.

Services

Our goal is to guarantee the excellent operation equipment with high safety for our customers and minimize the downtime of the machine by predictive maintenance. Kefid service and original accessories can be 100% trusted at the time of maintenance.

SERVICE AND SUPPORT

Minevik service and original accessories can be 100% trusted at the time of maintenance.

ACCESSORIES CENTER

striving to enable customers to get the parts in the nearest place.

SALES MARKET

Our sales market is spread all over more than 100 countries and regions

rolling mill defects

Macro Defects in Steel Rolling Defects

Damage Hot strip mill Rolling defects Damage Temper mill Rolling defects Damage occurring during further processing Heavy plate defects Rolling defects Damaged plate edges Heavy plate defects Rolling defects Damaged strip edges Hot rolled flat steel products Rolling defects

rolling defects of after machined metals TechMiny

The rolled parts are more thicker than the required thickness of metal because of the rolls get deflected by high rolling forces apply. The Elastic deformation of mill takes place on the metal.So some of rolling defects are provided in the metal forming.

(PDF) Analysis of the Surface Defects in a Hot-Rolled Low

Many surface defects caused by hot rolling are related to oxidation in the reheating furnace. One of these is the melting of eutectic FeO/Fe2SiO4 during reheating over 1170°C giving as a result

Defects in Hot Rolled Products1 | Rolling (Metalworking

save Save Defects in Hot Rolled Products1 For Later. Info. Embed. Share. Print. Related titles. Carousel Previous Carousel Next. Casting Defect in Slab. Root Cause of Mill Defects & Its Remedies. Rolling Defects. Defects Atlas for Surface Defects on Cold Rolled Steel. Galvanizing Defects & Rectifications. Continuos Steel Reheating Furnaces: Specification, Design and Equipment. Rolling

Rolling Mill Defects | Speaking of Precision Blog

Mill shearing is usually detected visually and appears longer than scabs. also, the surface below the defect is smoother and more uniform than found below scabs.. Excessive rubbing of the steel as it rolls through the mill causes overheating, shearing material off the bar, which is later picked up from mill components on the same or another billet.

Rolling Defects || Hot Rolling Surface Defects

25/02/2019· In this video I have discussed about various types of rolling defects or surface defects during hot rolling such as lap, mill shearing, seam etc. and causes of this. Tags:- rolling defects

Plate Rolling Defects and How to Avoid Them

17/10/2014· Conical Defects. The conical defect is when one side of the plate rolls tighter than the other side. It can be caused by the material not being loaded directly into the center of the machine or, it can be caused by the lower or side rolls being out of parallel (described below). Avoiding Plate Rolling Defects

(PDF) Analysis of the Surface Defects in a Hot-Rolled Low

Many surface defects caused by hot rolling are related to oxidation in the reheating furnace. One of these is the melting of eutectic FeO/Fe2SiO4 during reheating over 1170°C giving as a result

Rolling Defects || Hot Rolling Surface Defects

25/02/2019· In this video I have discussed about various types of rolling defects or surface defects during hot rolling such as lap, mill shearing, seam etc. and causes of this. Tags:- rolling defects

Rolling of hot strip and strip defects – IspatGuru

14/01/2017· Mill spring is a defect in which the rolled strip is thicker than the required thickness since the rolls get deflected by high rolling forces. 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

Technical Report Deformation Behavior of Oxide Scale in

during heating and rolling. If steel is rolled with the scale on the sur-face, it leads to surface defects, and to prevent this, scale is usually removed with high-pressure water immediately before the steel goes into mill stands. At high temperatures, however, carbon steel is oxi-dized so quickly that, even when scale is removed, the steel is

A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MILL

severe rolling accidents, due to faults by operators, weak rolled materials with internal defects, or because of other problems in a mill such as a power cut, mechanical problems of transportation or in

Advanced Process and Quality Control in Hot Rolling Mills

defects, less scrap production, improved quality, full integration in material tracking system and incorporation in production flow. These benefits have aroused considerable interest in eddy current testing as a method of improving production stability and quality in rolling mills. 7

Steel Defects | Speaking of Precision Blog

Typically rolling mill reheat cycles offer plenty of time to develop a subscale in a prior existing defect. However, for defects that are created during rolling, the limited time at temperature and the decreasing temperatures on cooling make formation of subscales unlikely. Reading Decarb and Subscale to Understand the Defect

(PDF) Detection and Classification of Surface Defects of

Detection and Classification of Surface Defects of Cold Rolling Mill Steel Using Morphology and Neural Network Conference Paper (PDF Available) · January 2009

Rolling of metals, types, analysis, defects, rolling mills

23/06/2015· Project Name: To prepare e-content and video in the area of Manufacturing Technology for UG and PG students and Industry area Project Investigator: Dr. Santosh Kumar.

Metal Rolling thelibraryofmanufacturing

In a metal rolling process, rolls, stands, bearings, housing, motors, and other mechanical equipment are all a necessary part of the manufacturing operation. The place where all the equipment for metal rolling manufacture is set up is called a rolling mill. Rolling mills often vary in

(PDF) Detection and Classification of Surface Defects of

Detection and Classification of Surface Defects of Cold Rolling Mill Steel Using Morphology and Neural Network Conference Paper (PDF Available) · January 2009

Root Cause of Mill Defects & Its Remedies

Root Cause of Mill Defects & Its Remedies Free download as Text File (.txt) or view presentation slides online. Scribd is the world's largest social reading and publishing site. Search Search

Technical Report Deformation Behavior of Oxide Scale in

during heating and rolling. If steel is rolled with the scale on the sur-face, it leads to surface defects, and to prevent this, scale is usually removed with high-pressure water immediately before the steel goes into mill stands. At high temperatures, however, carbon steel is oxi-dized so quickly that, even when scale is removed, the steel is

Rolling of Metals: Process and Principles (With Diagram)

The rolling process is shown in Fig. 2.1: Rolling is done both hot and cold. It is accomplishes in rolling mills. A rolling mill is a complex machine having two or more working rollers, supporting rollers, roll stands, drive motor, reducing gear, flywheel, coupling gear etc. Rollers may be plain or grooved depends upon the shape of rolled

Causes of Surface Cracks in Wire Rod Rolling Mill Hani

Causes of Surface Cracks in High-Speed Wire Rod Rolling Mill. Crack refers to the defect that the surface of the wire rod is straight or bent, bent or penetrated into the inside of wire rod at a certain angle along the rolling direction.

2006 Analysis of hot rolling events that lead to ridge

Analysis of hot rolling events that lead to ridge-buckle defect in steel strips Wanda Maria Carolina Melfo University of Wollongong Research Online is the open access institutional repository for the University of Wollongong. For further information contact Manager Repository Services: [email protected] Recommended Citation

Rolling presentation SlideShare

09/11/2016· 4 ROLLING MILLS (classified as number of arrangements of rolls) 1. Two-high mill 2. Two-high reversing mill 3. Three-high mill 4. Four-high mill 5. 5 A large decrease in the power required for rolling can be achieved by the use of small-diameter rolls. 5. Cluster mill 6. Planetary mill 7. Four stand continuous mill 6.

rolling+process SlideShare

15/01/2014· Four-high rolling-mill stand Screw or Hydraulic mechanism Housing Back-up rolls Chocks Work rolls Back-up rolls Fig.5 Schematic illustration of a four-high rolling-mill stand, showing its various features. The stiffness of the housing, rolls, and roll bearings are important in controlling and maintaining the thickness of the rolling strip. 9.

Zero-defect-strategy in the cold rolling industry

rolling direction, and they partly run out in tips or tongues. They can occur on both sides over the whole width of the rolled product with differing intensity. Slab damage may occur during the transport from the steel plant to the hot l- ro ling mill and during passage through the preheating furnace to scabs- leading like defects during hot

Deformation Processing Rolling

Flat Rolling Analysis • Friction plays a critical role in enabling rolling Æ cannot roll without friction; for rolling to occur • Reversal of frictional forces at neutral plane (NN) h b h f V 0 V f (> V 0) α L Entry Zone Exit Zone N N µ≥tanα

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