China Good quality Cast Steel Girth Gear Factory with High Quality with high quality

Solution Description

Girth Gears: Rotary kiln Girth Gear,ball mill Girth Gear
Girth Gears offered locate extensive application in distinct market sectors such as in sponge iron plants, steel & cement sector, mining sector, wind mills as properly as in other industry sectors. These are created obtainable in module variety of 10 Module to 70 Module and in minimum diameters of 100 mm to 15000 mm. Additional, these comprise greatest weight of 70 MT single pieces. Below the range of hardened & floor gear bins/gears comprise Worm equipment containers, Helical / Double helical gears/gearboxes, Helical-Bevel gearboxes, Planetary Gearboxes and other folks.

ZTIC Gear Cutting Equipment incorporate:
Ø16m CNC Hobbing Equipment
Ø12m Gear Slicing Machine (Switzerland)
Ø10m Hobbing Equipment (Germany)
Ø4m CNC Higher Speed Hobbing Device (Germany)
Ø1.6m Horizontal CHC Hobbing Equipment (Germany)
Ø5m CNC Profile Equipment Grinding Device (Germany)
Ø2.8m CNC Profile Gear Grinding Device (Germany)
Ø1.25m CNC Profile Gear Grinding Machine (Germany)
Ø1m CNC Profile Gear Grinding Machine (Germany)
Ø0.8m CNC Profile Gear Grinding Machine (Germany)
Automatic positioner
Module Variety:  10 Module to 70 Module.
Diameter : Min a hundred mm to16000 mm.
Weight : Max a hundred and twenty MT solitary piece.
Hardened & Floor Equipment Boxes/Gears:
Worm equipment packing containers
Helical / Double helical gears/gearboxes
Helical-Bevel gearboxes
Planetary Gearboxes
Hardened & Ground Helical- CZPT & Spiral-bevels gears/gearboxes.
Rack & Pinions
Rankings:
Min 3 hp to  Max 1400 hp
Splash / Pressured lubrication type
Ship Enquiry
With far more than a thousand girth gears sold more than the entire world CZPT Equipment is a leading supplier in the cement and mineral business. And as member of AGMA (American Equipment Manufacturers Association), we do actively get element in defining the standard for equipment rating calculations and support elements. 
We supply girth gears in 3 distinct patterns
Fabricated steel
– cast ring
– rolled plate
Forged steel 
Ductile (Nodular) forged iron  
Fabricated gears turned far more frequent in the past and are constructed with forged steel gear rim materials and electro welded human body structure. The rings are made from a whole block of higher resistance alloy steel. Right after the rough machining of the ring, we have out hardening and tempering heat treatment method in buy to improve the mechanical characteristic and therefore its appropriate efficiency.  
Avantages of fabricated girth gears
The solid material composition excludes the threat of inclusions
Framework problems like gasoline holes, CZPT shrinkage, pin holes, sizzling tears, sand and slag inclusions are prevented
Hence, mend welding of the human body composition and e.g. grinding of toothed locations is not essential.
The fabricated production treatment excludes the want for patterns and risers
Rim content has larger hardness and greater strength than the material used for the underlying construction (i.e. net, gussets)
These characteristics will lessen the direct time and charges. Fabricated producing ensures a quick delivery.
This is especially helpful in an unexpected emergency situation, where the present gear rim is suffering from damage   
Functions
External teeth 
Optimum diameter: 16000 mm 
Toothed face width: 1700 mm 
Optimum module: 45 by hob 
Greatest module: 65 equipment ending cutter
Interior teeth 
Optimum Diameter: 6500 mm 
Maximum module: 25.4 
Toothed encounter width: four hundred mm
Forging substance process 
Forging 
Ultimate rolling 
Furnace cooling 
Manage on production 
Drinking water quenching 
Hardness testing 
Tough machining 
Ultrasonic screening and dimensional inspection 
Closing inspection certification

Specifications/Certificates 
UNI EN ISO 
AWS 
ASTM 
ASME 
DIN 
Applications 
Our girth gears are used in the cement and minerals industries: 
Numerous kinds of horizontal mills 
Rotary dryers 
Rotary kilns 
Any other huge gear ring software
Pinions
ZTIC Equipment invested in significant sources and achieved many improvements with pinions. The appropriate mix of materials, hardness and finishing in between pinion and equipment is essential for a long life span of the mounted tools. We design and manufacture pinions to match every clients need, no subject how distinctive the situation may possibly be. 

Pinion layout
bored
reliable on shaft / integral
self aligned
spur, helical or double helical
Materialization
forged alloyed metal
through hardened, circumstance hardened or quenched and tempered
Spur, helical or double helical
carburized
induction
nitrided
Characteristics
equipment reducing with hobs
the gear high quality is checked by profile tester
tooth flank modification
– profile correction 
– direct correction (straight/barrel)
styles /ratios according to ISO-DIN-A.G.M.A.
FEM/FEA simulation software
Standards/Certificates
UNI EN ISO
AWS
ASTM
ASME
DIN
Applications 
Our pinions are applied in the cement and minerals industries:
Ball – mills
ROD – mills
Semi Autogeneous Grind (SAG)
Rotary kilns/coolers/dryers
Benefits
1 Resource
Unique Gear Manufacture (OEM) Specialized Drawings
Gearing technical knowledge for kilns and grinding mills
Condition of the art production amenities and high quality
International product sales and provider support
Rotary  Kiln Girth Gears
We are foremost supplier the Kiln Girth Gears for the various plants as shown below.
Sponge Iron Plants  50TPD 100TPD 300TPD350TPD,500TPD,1000TPD
Cement crops as for each customer need
Gears for phosphate mines, Alumina plant, kaolin-bentonite
Gear Reducing Capacity:
100mm diameter to 16000mm diameter
10Module to 70Module
The Kiln girth gears are offered mostly in bi-component, 4 elements, 8 elements or multi segments as for each the prerequisite and suitability with the software of equipment.
 
In the discipline of grinding mill elements, We source mill heads,feed inlet,grinding roller,cement kiln driving ring, casting gears, shaft block .Also we offer mill shell of welding constructions and fabrications.
 
Top quality assurance paperwork
The adhering to reviews are to be submitted to Top quality Assurance:
a. Chemistry report
b. Actual physical report
c. Heat remedy documents
CITIC HMC  Q/HM 973.2-2007
Specification for Steel Castings for Grinding Mills
one five
d. Ultrasonic inspection report (prior to and after repairs)
e. CZPT particle inspection report (before and after repairs)
f. Dimensional report
g. Weld repair maps
h. Weld techniques and Treatment qualification file
i. Welder qualification
j. Nondestructive screening inspector qualification

Product Structural functions Processing measure Take a look at content material
Girth Gear (1)GS42CrMo4Alloy Steel (corporate proprietary standards)
HB 220~240
(2)semi-structured, Y-Spoke 
(3)Helical 
(4) sensible sealing and alignment composition of alloy metal (company proprietary standards)
(1) outer steel refining (R-H argon and vacuum treatment) 
(2) proprietary chilly mold hanging sand engineering to make certain the casting, the enamel dense 
(3) normalizing (proprietary technological innovation) to ensure that the tooth surface area hardness 
After
(4)tough hobbing, release time, restore the joint surface area, then fantastic roll 
(5) proprietary homemade hob fantastic hobbing
(1)castings mechanical houses and chemical composition (inner common) 
(2) roughing after sonic testing 
(3)semi-finishing, ending right after ultrasonic tests and CZPT particle inspection 
(4) tooth area CZPT particle inspection, hardness test 
(5)tooth tolerance check 
(6) the factory assembly load test to verify the accuracy of the measurement of gear

 
The specialized requirements of a huge CZPT Equipment ring:
one) is pretreated before normalizing surface area hardening treatment method, the hardness should HB210 ~ 250 mechanical functionality are the final toughness Rb 690MPa, generate anxiety Rs 490MPa, elongation D5 eleven%, reduction of location W 25% , impact toughness Ak 30J enamel induction hardened, hardness HRC50 ~ 55 successful hardened layer depth 3 ~ 5mm.
two) all round ultrasonic flaw detection, inside high quality ought to meet 2 specifications GB7233-87 standard demands tooth and fillet CZPT particle inspection, high quality must meet up with 2 needs GB/T9444-88 specifications.
three) Note the casting is not rounded R5 ~ R10.
four) Tooth chamfer at each ends and 1 45b.5) by 2 and a 50 % ring equipment tooth width of every ring CZPT together the edge of a entire ring made with high energy bolts, mixed with the tooth floor have to be at the base center.
two big ring gear manufacturing approach
2.1 of rough
Steel casting blank is provided by CITIC Heavy Equipment Co., Ltd. Weighty Forging plant, run by GB11352-89 regular specifies demands for modeling according to the casting procedure, smelting, casting, hit bins, cleansing, dressing castings. During inspection and acceptance by the drawings and Technical specifications for metal blank
Checks, in accordance JB/T6402-92 specifications issued soon after acceptance
Down procedure.
2.2 roughing
Crossed by drawing and remain out allowance, alignment, link, processing the two inside of and outdoors the circle, combining confront milling, drilling and other procedures.
2.3 Exploration damage
General ultrasonic flaw detection, inside good quality should meet up with the 2 needs of GB7233-87 standards.
2.4 normalizing pretreatment
Semi-ring pairs normalizing and tempering treatment, provide a very good firm for subsequent floor hardening push drawings deformation of the half ring gear inspection soon after heat therapy.
2.5 Machining
Very first 2 and a 50 percent ring is made with high energy bolts connecting the ring as a complete, the total procedure by drawing a circle Quannei Wai teeth and upper and decrease conclude, and then drawing and machining milling procedure specifications.
two.6 Elimination of processing pressure
The all round ring annealed to eradicate pressure.
2.7 overall ring floor hardening
IF together the alveolar tooth surface induction hardening, hardness HRC50 ~ 55, successful hardened layer depth 3 ~ 5mm.
2.8 Last inspection
1st, the detection frequency quenching, the hardness soon after tempering ring gear cogging fulfills the demands of the drawings next, to detect whether the optimum outer diameter larger size D6944 as the deformation 3mm, the mechanical correction required until finally experienced Thirdly, tooth and fillet CZPT particle inspection, quality must meet up with 2 needs GB/T9444-88 regular demands Finally, according to the drawings and specialized specifications for closing inspection.

There are a lot of kinds of gears, and the most frequent classification approach is by equipment shaft. Typically, there are 3 kinds of the parallel axis, cross-axis, and staggered axis. 1) Parallel shaft gears: like spur gears, helical gears, internal gears, racks, and helical racks, and so forth. 2) Cross shaft gears: straight bevel gears, spiral bevel gears, zero-diploma bevel gears, and so forth. 3) Staggered shaft gears: There are staggered shaft helical gears, worm gears, hypoid gears, and so on.
The tooth floor hardness, it is divided into soft tooth surface area gear transmission and hard tooth surface equipment transmission. When the tooth surface hardness of the two wheels (or one particular of them) is much less than or equivalent to 350HBW, it is named soft tooth floor transmission when the tooth floor hardness of the two wheels is >350HBW, it is named tough tooth surface transmission. Soft-tooth surface area gear transmission is typically utilised for common reduced-pace equipment transmission that does not demand high precision, and challenging-toothed floor gear transmission is typically utilized for equipment transmission that demands strong bearing ability and compact structure.

China Good quality Cast Steel Girth Gear Factory with High Quality     with high quality