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[China]
Trade Verify
Address: No.2-A-609, NO.1 Longyu Road, Jianxi District, Luoyang, Henan, China
Contact name:David
Luoyang Zhongtai Industrial Co., Ltd. |
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Verified Suppliers
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Mining Equipment Of Ball Mill Spare Part Ball Mill Girth Gear Pinion Gear
1. Girth Gears: Rotary kiln Girth Gear,ball mill Girth Gear
Girth Gears offered find extensive application in different
industry sectors including in sponge iron plants, steel &
cement industry, mining industry, wind mills as well as in other
industry sectors. These are made available in module range of 10
Module to 70 Module and in minimum diameters of 100 mm to 15000 mm.
Further, these comprise maximum weight of 70 MT single pieces. Here
the range of hardened & ground gear boxes/gears comprise Worm
gear boxes, Helical / Double helical gears/gearboxes, Helical-Bevel
gearboxes, Planetary Gearboxes and others.
2. Product parameters of big ring for mill girth gear
| Item | Structural features | Processing measure | Test content |
| Girth Gear | (1)GS42CrMo4Alloy Steel (corporate proprietary standards) HB 220~240 (2)semi-structured, Y-Spoke | (1) outer steel refining (R-H argon and vacuum treatment) (4)rough hobbing, release time, repair the joint surface, then fine
roll | (1)castings mechanical properties and chemical composition
(internal standard) (2) roughing after sonic testing (3)semi-finishing, finishing after ultrasonic testing and magnetic particle inspection (4) tooth surface magnetic particle inspection, hardness test (5)tooth tolerance check (6) the factory assembly load test to check the accuracy of the size of gear |
3. Large ring gear manufacturing process
Rough:
Steel casting blank is provided by CITIC Heavy Machinery Co., Ltd.
Heavy Forging plant, run by GB11352-89 standard specifies
requirements for modeling according to the casting process,
smelting, casting, hit boxes, cleaning, dressing castings;. During
inspection and acceptance by the drawings and Technical
requirements for steel blank
Checks, according JB/T6402-92 standards issued after acceptance
Down procedure.
Roughing:
Crossed by drawing and stay out allowance, alignment, connection,
processing both inside and outside the circle, combining face
milling, drilling and other processes.
Exploration injury:
Overall ultrasonic flaw detection, internal quality should meet the
two requirements of GB7233-87 standards.
Normalizing pretreatment:
Semi-ring pairs normalizing and tempering treatment, provide a good
organization for subsequent surface hardening; press drawings
deformation of the half ring gear inspection after heat treatment.
Machining:
First two and a half ring is made with high strength bolts
connecting the ring as a whole, the overall process by drawing a
circle Quannei Wai teeth and upper and lower end, and then drawing
and machining milling process requirements.
Elimination of processing stress:
The overall ring annealed to eliminate stress.
Overall ring surface hardening:
IF along the alveolar tooth surface induction hardening, hardness
HRC50 ~ 55, effective hardened layer depth 3 ~ 5mm.
Final inspection:
First, the detection frequency quenching, the hardness after
tempering ring gear cogging meets the requirements of the drawings;
Secondly, to detect whether the maximum outer diameter larger size
D6944 as the deformation 3mm, the mechanical correction required
until qualified; Thirdly, tooth and fillet magnetic particle
inspection, quality should meet two requirements GB/T9444-88
standard requirements; Finally, according to the drawings and
technical requirements for final inspection.
