15 m large diameter module 28 alloy steel stainless steel gear ring
Overview
| Model | steel gear ring |
| Type | Round/Worm gear/bevel/Non-round /Rac Plastic stainless steel |
| Tooth shape | spur/bevel/curve/double gear |
| Production type | Casting/cutting/rolling/sintered gear |
| Wrapped | wooden box |
Application scope
| textile, agriculture, mining, food, oil and other transmission
machinery |
| Hardness | hardening |
| MOQ | ≥100 pieces |
product introduce
| Name | 15 m large diameter module 28 alloy steel stainless steel gear ring |
| Machining module | 0.2-10 |
| Materials: | stee45#l, 40CR, Easy car iron (1214#), brass, tin bronze,
POM(Sisteel), PVD, PVDFl, imported nylon, stainless steel 303#,
stainless steel 304#, aluminum 606#, aluminum 6063# |
Surface treatment: blackening, | high frequency, carburizing and quenching, surface nitriding, etc |
| Processing equipment: | CNC lathes, automatic lathes, general lathes, hobbing machine, gear
shaper, gear milling machine, shaving machine, milling machine,
grinding machine, wire cutting, etc |
| Processing technology | hobbing, gear, shaving, milling teeth |
| |
common spur gear specifications
| Common spur gear specifications |
| Modulus | 1M | 1.5M | 2M | 2.5M | 3M | 4M | 5M |
| tooth thickness | 10mm | 15-18mm | 20mm | 25mm | 30mm | 35-40mm | 40-50mm |
| inner hole | The blank hole |
| setting method | Outer diameter = module * (Number of teeth -2) |
Material is introduced
The steel commonly used in the manufacture of gears is tempered
steel, hardened steel, carburized hardened steel and nitriding
steel. Cast steel has a slightly lower strength than forged steel
and is often used for larger gears; Gray cast iron has poor
mechanical properties and can be used in light load open gear
transmission. Nodular cast iron can partly replace steel in making
gears; Plastic gear is mostly used for light load and low noise
requirements, and the gear with good thermal conductivity of steel
gear.
In the future, gear is developing towards the direction of heavy
load, high speed, high precision and high efficiency, and strive
for small size, light weight, long life and economic reliability.
The development of gear theory and manufacturing technology will
further study the mechanism of gear tooth damage, which is the
basis for establishing a reliable strength calculation method, is
the theoretical basis for improving the bearing capacity of gear
and prolonging the life of gear.A new tooth profile represented by
arc tooth profile is developed. Research new gear materials and new
technology of gear manufacturing; In order to improve the
smoothness of gear operation and increase the contact area of gear
teeth at full load, the gear bearing capacity is improved by
studying the elastic deformation, manufacturing and installation
errors and the distribution of temperature field.
Friction, lubrication theory and lubrication technology are the
basic work in gear research. The study of elastic fluid dynamic
pressure lubrication theory, the popularization of synthetic
lubricating oil and the proper addition of extreme pressure
additives in oil can not only improve the bearing capacity of tooth
surface, but also improve the transmission efficiency.
Processing method
Involute gear processing methods have two categories, one is the
copying method, with a forming cutter milling gear groove, is
"imitation shape". The other is the generativity method.
(1) Hobbing machine hobbing: can process 8 module below the helical
teeth
(2) Milling machine teeth: can process straight rack
(3) Slotting machine gear: can process internal teeth
(4) Cold beating machine teeth: no chip processing
(5) Gear planer gear: can process 16 module gear
(6) Precision casting teeth: cheap pinion can be processed in large
quantities
(7) Gear grinding machine: can process the gear on the precision
master machine
casting method
Gear castings are also known as cast steel gears. This is because
most gears are made of cast steel. Here I share some information
about the production of gear castings and related heat treatment.
Gear castings usually range in weight from a few kilograms to
several tons.
Gear castings are usually made of high carbon cast steel, but some
are made of alloy steel containing chromium, nickel and molybdenum
to achieve high tensile strength. Large gears generally have lower
physical requirements than pinions.
About the casting process, usually the floor molding process is
suitable and can meet the normal demand. For cast steel gears, such
as driven gears, gears and idler wheels, a floor molding process
using quartz sand is a good choice. Why? Because most parts of the
gear need machining. So, you don't need to use a higher casting
process. In addition, for medium and large steel castings, the
floor molding process using quartz sand is almost the only option.
Regarding heat treatment, of course, all steel castings must be
standardized to eliminate internal pressures. Some parts of the
gear casting can be welded. If the foundry welds castings, the weld
position must be annealed. If the hobbing is extremely hard, you
can anneal again to reduce the hardness and eliminate internal hard
spots. After machining and hobbing, a gear is hardened or hardened
to improve the surface hardness of its teeth. For pinion gear, you
can do carburizing. For large driven gears, you can do surface
hardening. Gears that have not been hardened have a short life span
of only a few weeks to a few months.
Because gear castings have higher requirements on materials,
defects, processing and heat treatment. Moreover, orders for gear
castings are relatively small. As a result, many steel foundries
are reluctant to manufacture.
Some gears are made by forging process. Forging gear internal
tissue density is better, higher strength. Forged gears can be used
for more stringent working conditions. Cast gears have low strength
but are widely used in general operating conditions. The cost of
forging gears is high while the cost of casting gears is relatively
low. The buyer shall select the appropriate manufacturing process
according to the cost and conditions of use.
