Helical Gear
Surface Treatment : Blackening, Chrome Plating, Nickel Plating, Galvanizing, Etc.
Ningbo Zhenhai Yuanyi M&E Manufacture Co., Ltd. is one of the leading manufacturers and suppliers of helical gear in China. If you're going to buy high quality helical gear at low price, welcome to get more information from our factory. Customized orders are welcome.
Introduction
Helical gears are similar to spur gears except that their teeth are cut at an angle to the hole (axis) rather than straight and parallel to the hole like the teeth of a spur gear. The line of contact between two teeth is not parallel to the teeth but inclined.Compared to spur gears, they have the larger contact ratio and excel in quietness and less vibration and able to transmit large force. A pair of helical gears has the same helix angle but the helix hand is opposite.
Surface treatment
- Blackening treatment: When the metal is heated to 14CTC in an alkaline treatment solution, the metal itself acts chemically to form a black film on its surface. The thickness of the black film is below and the chemical composition is ferric tetroxide. The film has an anti-rust effect.
- Nickel Plating : Nickel plating is generated on the surface of a metal by chemical methods.It is suitable for products with high dimensional accuracy and complex shapes.
- Galvanizing：Surface Treatment For The Purpose Of Improving The Rust Resistance Of Metals. With The Progress Of Polyate Passivation, The Appearance Performance Has Also Been Greatly Improved. The Thickness Of The Coating Varies, But It Is Generally About 225 Μm.
- Silver plating: Electroless plating has high corrosion resistance, and there is no electricity and no electrolysis in the silver plating process. It is suitable for use in products with high dimensional accuracy and complex shapes. Uniform coating thickness (3~10μm)
Production process
- Design the gear: First of all, you need to use design software to design the model of helical gears, and you need to take into account the size, shape, helix angle and other parameters of the gears when designing. Once the design is complete, the data is imported into the processing equipment.
- Gear blank preparation: Put the blank of the gear that needs to be processed into the chuck of the machine tool, adjust the attitude to ensure safety.
- Roughing: Use large tools (such as face milling cutters) for face machining, removing most of the allowance while leaving a certain margin for finishing.
- Heat treatment: After rough machining, the gear is heat treated to improve the hardness of the gear, so as to improve the resistance of the gear. After heat treatment, the gears need to be cooled to prevent deformation due to thermal stress.
- Finishing: The use of milling tools to finish the gear, including the processing of the tooth surface and the forming of the helix angle. In this process, the angle of the tool and the cutting data need to be constantly adjusted to control the depth of cut and surface roughness.
- Gear hobbing: Use a gear hobbing machine to cut out the gears and racks. Adjust the helix angle of the hobbing machine so that the hobbing tool can move according to the designed helix to cut the desired gear shape.
- Tooth grinding: fine grinding of the finished tooth surface to further improve the accuracy and finish of the tooth surface.
- Inspection: Finally, the processed helical gears are tested, including size, shape, helix angle, surface roughness, etc., to ensure that the helical gears meet the design requirements and quality standards.
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In the machining process, it is necessary to pay attention to some key points, such as the selection of tools and angle adjustment, the control of cutting parameters, the mastery of heat treatment temperature and time, and the correct use of detection methods. These factors will affect the machining quality and accuracy of helical gears.
Inspection equipment
Projector, Roughness Meter, Thread Diameter Runout Measuring Instrument, Caliper, Micrometer, Lever Micrometer, Microthread Caliper, Gauge, Rockwell Hardness Tester, Wechsler Hardness Tester, Diameter Gauge, Gear Testing Center, Roundness Tester, Deflection Meter, Go/no Go Gauge, High Gauge, Thread Gauge, Etc.
FAQ
Q: Why are helical gears stronger?
Partners
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