Rolling Mill Equipment

The roller section straightening machine is most suitable for straightening of any rolled, drawn or extruded ferrous and non-ferrous in cold condition. This machine is engineered to give trouble free long life service. The body and base of are fabricated from mild and steel and steel plants duly stress relied and machined as per design. All straightening rolls(topes and bottom) are mounted on cantilever type spindle. This arrangement is most suitable where quick change of rolls are required. The gangs of bottom rolls are driven by a distribution gear train. The directions of bottom rolls are clockwise/ anticlockwise depending upon of material. The top rolls for applying straightening pressure on material. These are having up-down and axial adjustment from front by hand wheels or optional motorized system.

All spindle are supported by heavy taper roller bearing to radial and axial load encountered in straightening. According to size of section we offer regular six models of machine to suit requirements. These machines are used in hot rolling mills, transmission line tower manufracturers, general fabricators and cold drawn hexagon, square and profile bars and hot extruded section.

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BCaiWa

Mining Equipment,cone Crusher For Stone Processing

Today China is the base of the heavy industry and equipment producing, the performance and the price have the competitive advantages. With the development of the world's economic stimulus policy, now the infrastructure is the focus project. And also the mining equipment as the important part in the infrastructure construction, has a rapid development of export.Many new kinds of the crushers are widely used in roads,railways,bridges,etc, the cone crusher has become a hot product of the crushers.

Advantages of Cone Crusher:
The device adopts new design and new crushing concept, can meet the different specifications crushing and also can meet the requirement of the new technology" more crushing, less grinding", the cone crusher has large crushing ratio, even granularity,low consumption, no special requirement of the humidity, is suitable for crushing super hard material, and also suitable crushing ore.Cone Crusher has a good application prospect in mineral processing field.

And also the cone crusher have the features: large crushing quantity, high capacity, with the special design, low maintanance cost, high efficiency. Compared with conventional equipment, the cone crusher has such features:large crushing ratio,even granularity, low consumption,Cone Crusher can crush all kind of mining ore materials, is an ideal energy-saving ultra-fine crushing equipment.

MHMHD is ONLY a machining factory. But through its dominant position, he can provide world-wide, heavy industrial components for the metals, power generation, and shipbuilding. Steel. Mining and many other industries.

Max casting is a 600tons.forging is a 200tons.

Our website: http://www.mhmhd.com

Luoyang Moheman Heavy-duty Machinery Co., LTD

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BCaiWa

Mining Metal

Mining Metal Detectors

Mining metal detectors are suitable solutions for mining applications. They can prevent damage to crushing machines, conveyor belts and other machinery in advance by detecting iron pieces contaminated in crushed stone and ores.

Digital metal detectors used for landmine detectors are also found. Usually, this process is done for humanitarian reasons or to enable military action. Mining metal detectors suitable for humanitarian application and military demining features detection head, telescopic handle and high impact polypropylene case.

Some mining metal detectors combine a control unit and search coil into a single unit, resulting in a compact design. The installation procedures are simple and easy. For mechanical installation, four point attachments to the conveyor frame are essential. The electrical work consists of connecting only three cables, including the power cable.

Mining metal detectors are also able to remove non ferrous metal components that cannot be detected using magnetic separators. Some models work in an efficient manner for high-manganese steel. Most of the metal detectors for mining projects use steel plated and water resistant construction. Some come with M type search coil. This mono-frame coil reduces the need for coiling work at the installation place. Vibration resistance is another added advantage.

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BCaiWa is Technical support at Luoyang Moheman Heavy-duty Machinery Co.Ltd

The stone crusher machine

Stone crusher features large crushing rate, high yield, equal product size, simple structure, reliable operation and easy maintenance, economic operating costs etc.

Stone crusher is widely used in mining and construction industry, metallurgy industry, building material, highway, railway, water conservancy, chemical materials and many other departments, the SBM stone crusher contains PE jaw crusher, JC jaw crusher, PF impact crusher, PFW impact crusher, cone crusher, VSI crusher and mobile crusher. The stone crushing units can be seen in the vicinity of almost all major cities and towns.

Stone crusher is suitable for crushing materials with particle size more than 3mm. According to the difference between feeding opener and output sizes, they are usually separated: primary stone crusher, secondary stone crusher (medium crusher) and fine stone crusher. SBM stone crusher can used as slag crusher, quartz crusher, lime stone crusher, granite crusher, iron ore crusher, marble crusher and so on.

For example, our Jaw crusher are ideal for primary and secondary crushing. With the increase of production, our jaw crusher can greatly reduce the operating costs. And it is of reliability and flexibility. The large feed opening and force-feeding action from the inward and downward eccentric movement of the swing jaw mean that our jaw crusher can increase the capacity.

our Hydraulic Impact Crusher is the latest kind of impact crusher developed from PF impact crusher based on the SBM's more than 20 years experience and leading technology in impact crusher. The PFW series impact crusher is also called European style impact crusher.

Jaw crusher has been widely applied in mining, metallurgical, construction, road and railway building, water conservancy and chemistry etc. It is mainly applied in the primary crushing in which the compressive strength of original material is under 320Mpa.

Hydraulic impact Crushers have the features of heavy duty rotor design, unique hammer locking system, interchangeable wearing parts, and easy maintenance. This series impact crushers provide customers low capital cost solutions, outstanding performance, good cubical shape, lowest operation cost per ton, and wide materials applications.

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BCaiWa

Micro gear manufacturing method

1. Injection molding plastic gears? Use of plastic injection molding method for processing gear, due to mass production can be achieved in a short time, so much for office machines, home appliances and other gear used in light load. In recent years, rising in the injection molding technology, plastic material properties are improved, the precision injection molding gears with substantial increases in the precision plastic injection molds for the gears and injection molding technology are affecting an important factor in injection molding method. In the production of mold, the main use of wire cutting and EDM. However, as the use of wire, forming electrode discharge gap and other factors limit the improvement of micro-precision gear molds. Electroforming mold also can be used to manufacture. The base used for electroforming gear, using cutting or grinding can improve its accuracy. Pieces of gear can be plated thicker base. By chemical dissolution, by the sun (or convex) of the baseline conditions are overcast (concave) mold. Baseline conditions due to high precision gears, plating will not produce distortion and other reasons, it is possible to produce high precision micro-gear mold. As a result of baseline conditions, using chemical solution method, can be processed out of the mold to the shape of complex, in addition to spur gears, helical gears, the bevel gears, face gears, worm and other types of mold can be manufactured. Using high-precision molds, so that mass production of plastic micro-gear possible. However, the gear is small, easily deformed by the force and other reasons, the large load transmission and drive high precision of the occasion, with great strength of the metal gear is more favorable. ?


2. Hob hobbing process? Usually hob in gear hobbing machine on the cutting system. Micro gear (m0.1 below) hobbing, the hob tooth must be micro-machining. Because small tooth, in addition to hob tooth profile error, the hob aperture beat, end beat, pitch and other error of micro gear will greatly affect accuracy. The processing of the hobbing machine, the workpiece spindle, tool spindle, the workpiece sub-degree institutions and Fixtures, and many other aspects of accuracy, stiffness and hob and the workpiece mounting accuracy, etc., will affect the manufacture of precision micro-gears, so it is necessary to improve accuracy of the total integrated manufacturing system. On this basis, then select the cutting of the material, you can more easily achieve the same volume modulus, the variety of different micro-gear. ?




3. Sintered metal production method? Metal powder in the mold after molding, high pressure, high temperature sintering is made of sintered metal gears curing (powder metallurgy gear), its high mechanical strength than the plastic gears in the middle-load conditions of use. Molding method suitable for mass production. But the die forming, after a high temperature sintering, large deformation, so to achieve the necessary precision, but also in the sintered gear for finishing. As the tooth small, micro gear finishing difficult, combined with a larger metal particles of metal powder, thus limiting the shape precision and surface finish improvement. If mold injection molding plastic gears used in the above mentioned benchmarks Gear electrode electrochemical machining method, the accuracy of their processing out of gear is likely to increase. ?


4. Other manufacturing methods? Using semiconductor manufacturing method, optical or laser etching method can create micro-machining of gear. Optical loss method can trial out of hundreds of tiny micro-sized gears, broaches can be drawn inside the gear. Future demand for more and more micro-gear, new manufacturing methods and mass production technology will also continue. ?




source:http://useascender.com/856988-The-manufacture-of-micro.html

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BCaiWa

How to correct maintenance and repair ball mill

The ball mill common cause of the malfunction and its elimination method are shown in the following table

How to correct maintenance and repair ball mill

Maintenance and repair of the ball mill is a regular work , maintenance work will affect the mill rate and the life of the operation , then the process of how to use the correct maintenance and repair , give the following introduction :
1 , all the oil mill into continuous operation in a month should be all released , thoroughly washed , replaced with new oil . After rounding the combination of oil change once every 6 months .
2 , the wear of steel ball in a timely manner in accordance to add .
3, if found to be normal maintenance should immediately stop grinding .
On the mill 's maintenance of a regular work , maintenance work directly affects the rate and service life of ball mill operation . In order to eliminate hidden dangers to detect deficiency in order to ensure normal operation of its mill , in addition to routine maintenance , but also require regular stop grinding , ( recommended monthly ) on important components such as hollow shaft , main bearings, cylinder, gear , Size of the gear for serious examination , a detailed record . In accordance with the defect of the sub- priorities and arrangements for proper disposal repair and overhaul program .

4 , the lubrication points, lubrication and oil level checked at least every 4 hours .
5, large and small gears smoothly without abnormal noise . Necessary, adjust the gap in time .

6, mill liner is worn 70% or a 70mm long crack should be replaced .
7, liner bolts for damage caused by loose liner should be replaced .
8, mill operation , the main bearing lubricating oil temperature does not exceed 55 .
9, mill normal operation , the drive bearings and gearbox temperature does not exceed 55 , a maximum of 60 .

10, main bearing serious wear and tear should be replaced .
11, lattice -type ball mill Grate Plate Welding can no longer wear to be replaced .
12, large gear gear surface wear to a certain extent continue to use after turning it over .

13, ball mill running smoothly and without a strong vibration .
14, electrical current fluctuations should be no exception .
15, no loose fasteners each connected , combined with surface without leakage , the five tax evasion water , no leak of mine phenomenon .

16, severe wear of the pinion should be replaced .
17 , should be timely access to material wear spiral welding repair , welding repair can not be worn to replace .
18, anchor bolts loose or damaged should be repaired in time .

Failure to eliminate the reasons for the phenomenon method 
Main bearing melting, the bearings smoking or electrical overload power outages
1. Journal of lubricants supply interruption;
1. Cleaning and replacement of bearings lubricants

2. Falling into the sand in the bearings;
2. Bearings and repaired or re-casting Journal

Starting at the ball mill, the electrical overload or prior to the commencement could not be activated no later start-disc mill

Hydraulic too high or too low 
1. Tubing plug, fuel shortage; hydraulicor eliminate the reasons for the lower
2. Non-oil viscosity, the dirt, filter plug

Electrical power supply instability or excessive
1. Spoon the first activities of the ore loose; tight on the first or spoon to the mine, improved lubrication conditions, the replacement liner, adjusting operation, replacement or repair gear, ruled out electrical fault
2. Debris back to eating sand

3. Hollow shaft lubrication bad

4. Pai ore concentration

5. Around the cylinder liner weight imbalance, or uneven Mount Loss

6. Excessive wear gear

7. The electrical fault on the circuit

Bearing fever
1. The volume of ore or more or less; oily failed to stop fouling mine, to identify reasons for the replacement of oil pollution, cleaning bearings, check lubricants ring.

2. Bearing Installation tendencies or loading debris

3. Circuit illogical, lubricants Central does not work

Ball mill vibration
1. Gear meshing well, or wear a substantial adjustment tooth gap and tighten loose screws, repaired or replaced Bearing

2. Bearing pin or screw in screws loosening

3. Large gear connected off screws or loose screws

4. Bearing Wear a very Drive

Suddenly a strong vibration and impact of the acoustic
1. Mix-iron gears meshing space debris to eliminate impurities, tighten the screw, repaired or replaced Bearing
2. Fixed gear shaft small string;
3. Gear bash
4. Bearing or fixed on the basis of screws loose in
Cover connection with the cylinder, screw liner missed the pulp
1. Loose screw connection, the positioning pin-tightening or replacing screws and tighten the positioning pin, and sealing gaskets.
2. Lining screws loose, ring wear, bolts interrupt

Overhaul

Indeed ball mill for the operation and enhance the safety of its equipment intact rate, extend the life span of machinery, must be planned overhaul. Repair work is divided into three types:

Minor repairs: a monthly, including temporary accident repairs, mainly for small, minor. Grindability focused on the replacement parts, such as ball mill liner, the first to mine-spoon, adjusting bearings and gears meshing situation. Throughout the repair of Repair: General takes place once a year, the various components of the equipment for the clean-up and adjustment of larger, easy replacement of a large number of mill components.

Overhaul: In addition to the completion of medium and small repair tasks, focus on the repair and replacement of major components, such as the hollow shaft, the gear, etc.. Overhaul time interval is determined by the extent of the damage these components.

Fragile milling mill parts and the average life span as a minimum reserve of Table 9-3.

Vulnerable parts of the name Life (months) in each machine at least spare capacity
Cylinder Liner Manganese Steel 6-8 2 sets
Cover liner ibid. 8 ~ 10 2 sets
Journal of carbon steel liner or white iron 12 ~ 18 1 kit
Lattice board liner manganese steel or chrome steel 6 ~ 18 2 sets
Mine-to-carbon steel spoon or white iron 8 2 sets
The ore-body shell ibid. 24 1 kit
Main bearing bush bearing alloy 24 1 kit
Drive bearing bush bearing alloy 18 2 sets
Small gear 40Cr 6 ~ 12 2 sets
Gear carbon steel 36 to 48 1 set
Lining screw steel 6-8 semi-sets

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BCaiWa

35hMFA steel composition

35hMFA steel composition

                C    Cr        Mn    Ni        P        S        other
35KhMFA        0.33 1.04     0.40     -         0.023     0.018     0.23mo

35 hMFA. 38KhMA. 38Kh2N2MA. 38Kh2N2MA. 22K. 25KhN3MFA. 15Kh2NMFA. 35L. 35L. 40L. 20L. 12KhGFL. Note. Thermal treatment regime,. °C. Hardening from 880 + annealing at 540. Hardening from 880 + annealing at 600. Hardening from 850 + annealing at 650. Hardening from 850 + annealing at 600 ...
springerlink.com/index/x1n17l6654w28416.pdf

Links of fracture characteristics with structure of cast and deformed structural steels
Journal    Metal Science and Heat Treatment
Publisher    Springer New York
ISSN    0026-0673 (Print) 1573-8973 (Online)
Issue    Volume 33, Number 3 / March, 1991
Category    Strength Properties
DOI    10.1007/BF00769342
Pages    197-202
Subject Collection    Chemistry and Materials Science
SpringerLink Date    Monday, December 13, 2004
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A. V. Vikulin, A. V. Popkov and V. V. Skobkin

Conclusions 
1.      The crack resistance of steel depends on its structural condition and is determined by the average dimensions of the initial or actual austenitic grain or the dimensions of other structural elements, for instance, packets of martensite.
2.      The proposed diagrams which link the characteristics of strength, impact strength, crack resistance, and the average dimension of cleavage facets make possible to carry out a simplified evaluation of the crack resistance of structural steels.
Leningrad Technical Institute of the Refrigeration Industry. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 18–21, March, 1991



Investigation and selection of steels for nitrided crankshafts
Journal    Metal Science and Heat Treatment
Publisher    Springer New York
ISSN    0026-0673 (Print) 1573-8973 (Online)
Issue    Volume 20, Number 3 / March, 1978
Category    Technical Information
DOI    10.1007/BF00777106
Pages    243-245
Subject Collection    Chemistry and Materials Science
SpringerLink Date    Monday, December 13, 2004
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V. V. Skotnikov, V. N. Zikeev and V. V. Krasikov

Without Abstract
Yaroslavl Engine Factory. I. P. Bardin Central Scientific-Research Institute of Ferrous Metallurgy. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 65–67, March, 1978.





from:Steel in the USSR

Steel in the USSR. --
London :Iron and Steel Institute,1971-1991
v. :ill. ;30 cm.
Vols. for 1971-73 issued by the Iron and Steel Institute; 1974- by The Metals Society.
"A selection of translated material from Stal' and Izvestiëiìa vysshikh uchebnykh zavedenii, chernaëiìa metallurgiëiìa."--verso t.p.
1
4:SER 668.14 S813 1971 p.4965-end/Ind. canm v.16:SER 668.14 S813 1972 p.501-end/ind. canm v.28:SER 668.14 S813 1973 p.533-end/ind. canm v.310:SER 668.14 S813 1974 p.517-end/ind. canm v.4
1.Steel--Translations from Russian--Periodicals.
Dynamic Details
#9996929LCCN:72-615597

Holdings
SER 668.14 S813 1971 p.1-495 canm v.1
32329000333836
Circulating from Ottawa (555 Booth)
Located at Stacks
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SER 668.14 S813 1971 p.4965-end/Ind. can
32329000333844
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available
SER 668.14 S813 1972 p.1-500 canm v.2
32329000333851
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available
SER 668.14 S813 1972 p.501-end/ind. canm
32329000333869
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available
SER 668.14 S813 1973 p.1-532 canm v.3
32329000333877
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available
SER 668.14 S813 1973 p.533-end/ind. canm
32329000333885
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available
SER 668.14 S813 1974 p.1-515 canm v.4
32329000333893
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available
SER 668.14 S813 1974 p.517-end/ind. canm
32329000333901
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available
SER 668.14 S813 1975 canm v.5
32329000333919
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available
SER 668.14 S813 1976 canm v.6
32329000333927
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available
SER 668.14 S813 1977 canm v.7
32329000333935
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available
SER 668.14 S813 1978 canm v.8
32329000319769
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available
SER 668.14 S813 1979 canm v.9
32329000333943
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available
SER 668.14 S813 1980 canm v.10
32329000333950
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available
SER 668.14 S813 1981 canm v.11
32329000333968
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available
SER 668.14 S813 1982 canm v.12
32329000333976
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available
SER 668.14 S813 1983 canm v.13
32329000333984
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available
SER 668.14 S813 1984 canm v.14
32329000333992
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available
SER 668.14 S813 1985 canm v.15
32329000334008
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available
SER 668.14 S813 1986 canm v.16
32329000334016
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available
SER 668.14 S813 1987 canm v.17
32329000144712
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available
SER 668.14 S813 1988 canm v.18
32329000334024
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available
SER 668.14 S813 1989 canm v.19
32329000334032
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available
SER 668.14 S813 1990 canm v.20
32329000334040
Circulating from Ottawa (555 Booth)
Located at Stacks
Status is Available

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BCaiWa