The Bright bars are basically the raw material for a number of industries engaged in the manufacture of items such as bolts, nuts, shafts Iron bar etc. By virtue of the finished surface, which is smooth and with in the designed tolerances bright bars are normally drawn round, square pentagonal or hexagonal. In is proposed to define briefly a rolling mill we are concerned mainly with hot rolling mill, that is mill in which the steel is heated to a suitable temperature before rolling takes place.
A hot mill, mill stand consists of two three or more cylindrical metal rolls usually mounted horizontally in bearing at their ends and vertically above each other. If there are two rolls in the mill is called 2 high, and three rolls, 3 high and soon. These rolls may be driven through couplings at their ends by spindles which, are in their turn, coupled to pinious (orgeors) which transmit the power from the prime move (now usually an electric motor though some steam or gas engines are still in use.)
The use of the terms wobbler and "coobler box" for the coupling at each end of the spindle suggests a rather loose fillings coupling per mitting a limited vertical movement of the rolls whilst transmitting the driving power.
These wobbler couplings have been superseded in many mills by more advanced designs or Universal and semi universal couplings wobbler refers to the end of the roll fitting in to the coupling box the "roll body" or "barrel" lies between the bearing neck, the latter being the parts which turn in the bearings the bearings are housed in `chocks' which are positioned in "windows" in the mill housing and these chocks may be raised or lowered to adjust the gap between the rolls.
STEEL BRIGHT BARS
Cost Estimation
Plant Capacity 12 MT./Day
Land & Building (Area 4000 sq.mt.) Rs. 3.04 Cr.
Plant & Machinery Rs. 58 Lacs
W.C. for 2 Months Rs. 2.39 Cr.
Total Capital Investment Rs. 9.20 Cr.
Rate of Return 18%
Break Even Point 66%
• EIRI can modify the Capacity of the Project and Total Capital Investment as per your requirement.
• Note: The project investment cost and capacity are subject to change without any notice. Future projects may have different values of project cost and capacity.
MARKET SURVEY CUM DETAILED TECHNO
ECONOMIC FEASIBILITY REPORT covers
- Introduction
- Mill Size
- Mill Stand
- Mill Train
- Roll Arrangement in Single Stands
- USES & APPLICATION
- B I.S. SPECIFICATIONS
- MARKET SURVEY
- Government Initiatives
- Steel Industry in India
- Summary of Past Approaches to Estimate Steel Consumption
- OBSERVATIONS
- MANUFACTURING PROCESS OF BRIGHT STEEL BAR
- COLD DRAWING
- Stress Relieve Anneal
- Bright Bar Defects
- Removal of Surface Defects by Inspection
- Steel Grade Names
- Bright Bar Product Range – Sections, Tolerances & Grades
- Dimensional Tolerances
- Length Tolerances
- Straightness tolerances for critical applications
- Surface Quality
- Cold Drawn and Cold Rolled Bars
- Turned and Polished or Precision Ground Bars
- Surface Roughness
- Steel Grades – Chemical Composition
- Bright Bar Straightness Tolerance
- Bright Bar Dimensional Tolerances B.S.970 Part 3 1991
- Stainless Steel Bolting Material (As Per Astm A19 3 & Astm A320 Specification)
- Packing
- PROCESS FLOW DIAGRAM
- PLANT LAYOUT
- SUPPLIERS OF BLACK AND BRIGHT STEEL BARS
- ACID AND CHEMICALS
- DRAW BENCH
- STRAIGHTENING MACHINE
- BAR POINTING MACHINE
- POWER HACKSAW
- Drilling Machine
- WEIGHING MACHINE
- Diesel Generator
- GRINDING MACHINE
- ARC WELDING MACHINE
- LATHE MACHINE
- ETP PLANTS
- ELECTRIC HOISTS
- PICKLING TANK
- ANNEALING FURNACE
- POWER TRANSFORMERS
- AIR COMPRESSORS
APPENDIX
1. COST OF PLANT ECONOMICS
2. LAND & BUILDING
3. PLANT AND MACHINERY
4. FIXED CAPITAL INVESTMENT
5. RAW MATERIAL
6. SALARY AND WAGES
7. UTILITIES AND OVERHEADS
8. TOTAL WORKING CAPITAL
9. COST OF PRODUCTION
10. PROFITABILITY ANALYSIS
11. BREAK EVEN POINT
12. RESOURCES OF FINANCE
13. INTEREST CHART
14. DEPRECIATION CHART
15. CASH FLOW STATEMENT
16. PROJECTED BALANCE SHEET
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