A double helical gear incorporates two opposite orientated helical gears of the same helix angle together such that the two opposing thrust forces annihilates one another.
For many years such double helical gears, as an example for components with geometrical interference, have been a special challenge in finishing gears. While in the past military low lot size applications might have been the main focus, there is now a current boost in demand for double helical gears in planetary reduction gear boxes for engines in civil aviation. Increasing requirements for weight reduction and fuel saving lead to decreasing sizes of design forms.
Product name:
Double Helical Gear
Type:
According to drawings
Material:
C45 steel, alloy steel or customized
Package:
Packing adapting to ocean transport
Structure:
Forging
Certification:
SGS,ISO
Process:
Lathing, milling, drilling, welding, hobbing
Delivery time:
30 - 90 days
Quality control Serious raw material inspection; Strict control over the entire manufacturing process; Sampling of all the products after final inspection before shipment; Quality trace after delivery.
Technological Process
42CrMo,C45 ZG310-570 or other ally steel will be used as raw material according to the customer’s requirements through forging or casting method. Ultrasonic inspection will be done to ensure the material are free of pore,holes and cracks. Measuring the size of the forging,calculation the processing allowance and accurate to estimate the cutting times in the turning process.
The tooth will be hobbed on gear hobbing machine or milled on CNC gentry milling and drilling machine according to the tooth type and module.The other dimension are processed to finished size according to drawing.
Large nonstandard tooth will be milled on the CNC gantry milling and drilling machine
The conventional tooth will be hobbed on the gear hobbing machine
Surface quenching or carbonization will be done after finish machining to improve the hardness and abrasive resistance of the tooth. after the surface quenching, we will inspect the hardness of the tooth.
We have prefect and strict quality management system and experienced inspector to control the product quality.The gear will be inspected strictly according to the drawing.
By air or by sea,DHL/TNT/UPS/EMS etc.According to customer’s requirements.
