Automobile gearbox parts, synchronizer gear hub deburring, descaling and polishing process method

How to deburr, descale and polish the synchronizer gear hub,parts of automobile gearbox?

As a key component of automobiles, the transmissions have particularly strict requirements on the material, shape and position tolerance, surface quality and other factors of the mechanical parts assembled into them. The synchronizer hub is an indispensable and important component of the transmission, which is mainly used to reduce the impact between gears when the car shifts gears and achieve smooth speed change of the car.
Synchronizer gear hubs are generally produced by powder metallurgy. During the processing and forming process, due to reasons such as molds, processes or raw materials, visible burrs and rusts often appear on the edges between the teeth or in the middle keyway of the product. The presence of this burr phenomenon will have an adverse effect on the surface quality of the product, and will have a great impact on the mechanical properties, safety, and user experience of the transmission assembly. Today we will share a case study on how to remove burrs and flash from automotive synchronizer gear hub products and achieve high-efficiency finishing and polishing in large quantities. This deburring process method is also suitable for the finishing and polishing needs of other automotive parts such as gears, gear rings, gear sleeves, powder metallurgy or castings.

    • jerrylu
    • 2024-12-10
    • 0 Comments

     

Automobile gearbox parts, synchronizer gear hub deburring, descaling and polishing process method

1. Synchronizer gear hub before deburring, finishing and polishing
How to deburr, finish and polish the synchronizer hub of automobile gearbox parts

Materials：

Powder Metallurgy

Appearance：

There are obvious burrs, flashes, and rough edges.

Shape：

Circular

Size：

20*90 MM

Pre-polishing process：

Sintering

Post-polishing process：

Anti-rust treatment

2. Finishing and polishing requirements
  • Efficient batch deburring, deflashing.
  • Improve surface brightness.
3. Synchronizer gear hub deburring,finishing and polishing process details：
Process steps （1） Heavy cutting to deburr and descale （2） Fine finishing to improve surface brightness （3） Drying and rust prevention
Machinery and Equipment vibratory finisher vibratory finishing machine vibratory dryer
Speed High High High
Abrasives heavy cutting media fine finishing media drying media
Ratio of media to workpiece 4：1 4：1 8：1
Chemical compound finishing compound polishing compound N/A
Water Right amount, the liquid level does not exceed the media Right amount, the liquid level does not exceed the media N/A
Processing time 30 minutes 30 minutes 10 minutes
Remark Automatic screening and rinsing Automatic screening and rinsing Hot drying
4. Synchronizer gear hub after deburring, finishing and polishing
The effect of deburring, finishing and polishing of synchronizer gear hub of automobile gearbox parts
The effect comparision of deburring, finishing and polishing of synchronizer gear hub of automobile gearbox parts

5. Additional Comments
  • The main production process of synchronizer gear hub is powder metallurgy. After sintering, it needs to be trimmed to improve the dimensional accuracy of the sintered product and ensure that the product accuracy meets the requirements of synchronizer gear hub. The burrs are mainly concentrated on the edges of the tooth edges and keyways, and the daily processing quantity is large. Therefore, a vibratory finishing machine is used, and a heavy-cutting finishing media is used to remove the burrs. The sharp angle of the media can penetrate into the grooves between the tooth edges to achieve the purpose of removing burrs and chamfering.
  • Fine finishing and polishing brightness is also achieved by using a vibratory finishing machine, using high-density precision polishing media with slight cutting force, which can improve the surface brightness while micro-cutting and reducing roughness.
  • In order to improve the anti-rust and anti-corrosion performance of the product after water treatment, it is immersed in a rust inhibitor for anti-rust treatment after polishing. Finally, a vibratory dryer is used to absorb the surface water and dry it.

6. Final summary
  • In this case study, we demonstrate the process of surface chamfering, deburring and polishing of a powder metallurgy synchronizer hub component.
    This process is also suitable for surface polishing of powder metallurgy sprockets, bushings, structural parts, 3D printing products and metal powder injection molding products.
  • If you need professional technical support for deburring, descaling, derusting and polishing of aluminum alloy and zinc alloy parts or the following products through casting, die-casting and other molding processes, you can refer to the above cases:
    Gear hub processing technology
    Gear ring deburring equipment
    Gear deburring technology
    Gear deburring machine
    What are the deburring processes after rough machining of gears
    Gear deburring and chamfering technology
    Gear hobbing deburring

Polishing technology and method of powder metallurgy products

How to chamfer, deburr and descale the powder metallurgy parts?

Powder metallurgy is an advanced industrial technology that uses metal powder (or a mixture of metal powder and non-metallic powder) as raw material, and forms various types of products through forming and sintering. It is very suitable for mass production. In addition, some materials and complex parts that cannot be prepared by traditional casting methods and machining methods can also be manufactured using powder metallurgy technology, so it has received much attention from the industry. Do you know what kind of finishing and polishing process powder metallurgy products need to go through to obtain a satisfactory surface effect? ​​In this case, we will share a process technology and method for chamfering, deburring, descaling, polishing and brightening of powder metallurgy gear parts. This polishing solution is also suitable for the surface polishing of powder sintered sprockets, bushings, structural parts, 3D printing products and metal powder injection molding products.

    • jerrylu
    • 2024-06-03
    • 0 Comments

     

deburring,derusting and polishing effects of powder metallurgy gear parts

1. The surface of powder metallurgy gear parts before polishing
burrs and scale of powder metallurgy gear parts before polishing

Materials:

Iron-copper powder mixture

Appearance:

burrs on the edges of the teeth and grooves,
oxide scale on the surface

Shape:

gear

Size:

35*50MM

Pre-polishing process:

powder metallurgy

Post-polishing process:

packing

2. Requirements for polishing
  • chamfering of tooth edge, deburring of the grooves.
  • smooth and brighten surface, no burrs, no oxide scale.
3. Powder metallurgy gear parts polishing process details:
Process steps （1） rough deburring,chamfering,descaling （2） fine polishing （3） anti-rust drying
Machine and equipment vibratory finishing machine vibratory finishing machine vibratory dryer
Amplitude and speed highest speed highest speed highest speed
Tumbling media angle cut cylinder ceramic media spherical white corundum finishing media no
Abrasive media to workpiece ratio 4：1 6：1 8：1
Finishing and polishing compound finishing liquid polishing liquid anti-rust liquid
Water appropriate amount, the liquid level does not exceed the tumbling media appropriate amount, the liquid level does not exceed the tumbling media no
Polishing time 60 minutes 30 minutes 30 minutes
Remark automatic separating and picking up, rinsing with water automatic separating and picking up, rinsing with water anti-rust liquid soaking, vibrating drying
4. Effect of powder metallurgy gear parts after finishing and polishing
powder metallurgy gear parts chamfering, deburring, descaling, polishing, brightening effect
chamfering, deburring, descaling, polishing, burnishing effect of powder metallurgy gear parts

5. Additional instructions
  • This powder metallurgy product is a small-sized workpiece, and the burrs are mainly concentrated on the the tooth edges. The daily processing quantity is large, so a vibrating finishing machine is used, and a heavy-cutting angle cut cylinder deburring tumbling media is used for rough finishing. The sharp corner of angle cut cylinder can reach into the grooves between the tooth edges to remove burrs and chamfer.
    Fine polishing and brightening is also achieved by using a vibratory polishing machine, with the high-hardness, light-cutting spherical white corundum finishing media for fine finishing, which can perform micro-cutting, further reduce roughness, and improve surface brightness.
  • Because the product processing quantity is large, the product separating can be done by using vibratory separator to improve efficiency.
  • In order to improve the anti-rust and anti-corrosion performance of the product after water treatment, it is immersed in a rust inhibitor for anti-rust treatment after polishing. Finally, a vibrating dryer is used to dry the surface moisture and dry it.

6. Final summary
  • In this case study, we demonstrate the process of surface chamfering, deburring, descaling, polishing and brightening of a powder metallurgy gear component.
  • This process solution is also suitable for surface polishing of powder metallurgy sprockets, bushings, structural parts, 3D printing products and metal powder injection molding products.

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