Advantages and disadvantages of roller burnishing process

Roller burnishing process is a kind of non-chip machining, which exerts certain pressure on the workpiece surface through certain forms of roller burnishing tools. The plastic deformation of metal is used to smooth the uneven surface of workpiece at normal temperature, so as to change the surface structure, mechanical properties, shape and size. Therefore, this method can achieve two purposes of finishing and strengthening at the same time.

Manufacturer, Exporter, Supplier and Trader of Roller Burnishing Tools

Advantages of roller burnishing pressure:

After the surface of the metal workpiece is rolled and processed, the hardness of the workpiece surface is strengthened and the yield point is increased.

The performance, fatigue strength, wear resistance and corrosion resistance of workpiece have been improved obviously.

The roller burnishing process is easy to master, and can be processed by ordinary drilling machine. Ordinary operators can process the mirror precision, micron precision parts!

The comprehensive cost of roller burnishing tool is low, which is 10-100 times lower than the cost of grinding machine, quilting machine and ultrasonic rolling.

The deficiency in roller burnishing process:

The surface of the workpiece will be hardened by rolling, and there is obvious stratification between this layer and the inner material, which is easy to cause the surface to fall off.

The rigidity of roller burnishing tool is large, which damages the guide rail of the transmission mechanism of the machine tool and seriously damages the precision and life of the machine tool.

It can not satisfy the processing of rigid parts such as thin-walled pipe fittings.

Characteristics and performance of single roller burnishing tool

External groove single rolling type

Precise processing for external groove, such as external sealing ring of shafts and cylinder. Through changing rolling wheel shape, the tool may process external diameter with large size, prick, end, and R section.

Internal groove single rolling type

Precision inner groove rolling process for inner hole, used on lathe, such as inner groove sealing ring of oil cylinder.

By changing the shape of the roller, the groove of different shapes and the end face of inner diameter can be processed, such as inner sealing groove surface, R surface (inner R and outer R), inclined surface and so on for burnishing rolling.

Single Roller Burnishing Tools (Carbide / HSS) Manufacturer, Exporter & Supplier

Single roller burnishing tool’s performance:

This tool can be used on general lathes, CNC series machine tools, processing centers and other equipment.
It is applicable to the processing of outer groove and inner groove of all kinds of metal parts with hardness less than HRC40.
Machining scope: the minimum groove width is 1.0mm, the groove depth is less than 20MM, the outer groove width is unlimited, and the hole diameter of the inner hole is greater than 25mm.
After one-time processing, the surface roughness of the parts can reach ra0.2um.
It can also be customized according to user requirements and machine tool specifications.

Operation method of single roller burnishing tools:

Select the appropriate external groove single roller burnishing tools and internal groove single roller burnishing tools, and attach the tool mounting clamping part to the tool holder of the machine tool equipment.
Make tool head fit with workpiece axis and groove center.
The design of external groove single roller burnishing tools is equipped with a spring pressure regulating device, whose floating range is between 0.2mm and 0.4mm.
For the best effect, please choose the appropriate roll pressure.

The fatigue strength of the workpiece can be improved by using roller burnishing tools

The fatigue strength of the workpiece can be improved by using roller burnishing tools.

While improving the surface roughness of workpiece, the residual compressive stress will be generated in the surface layer which can improve the fatigue strength of workpiece.

By comparing the residual stress distribution of SUS304 after turning and rolling, it can be seen that the residual compressive stress in the workpiece after rolling is the maximum depth of shear stress from 0.08 to 0.10mm.

The results of the internal pressure fatigue failure test for the same shaped sample show that: The residual compressive force in the circular direction of workpiece after rolling can inhibit the occurrence of cracks near the fatigue limit and increase the fatigue strength by 30%.

Integrated Drilling, Chamfering and Deburring Tools in a Single Process

How Integrated Drilling, Chamfering and Deburring Tools work?

During processing with the Integrated Drilling and Deburring Tool, First step, a through-hole is drilled through the drill bit and drill bit centering. Second step, upon entry, spring tension holds the cutting blade in the extended position as it removes the burr on the front of the hole. Third step, as the feed load increases, the pre-set spring tension is exceeded and the blade retracts automatically as the tool passes through the workpiece. Fourth step, spring tension again causes the blade to extend as it emerges from the ID of the part; the burr is removed on the back side of the hole on the return stroke.

Today, a client from Chennai, India; who asks RBT that whether we have the integrated tools for drilling, chamfering and deburring in one-pass. His requirements are machining a small size hole in a tube of EN8 steel, as below:

Workpiece Materials: EN8 Steel

Workpiece Hardness: Standard Hardness

Workpiece Diameter: 38 mm

RBT solutions: A special & customized drilling and deburring tool from RBT burnishing tool is Integrated Drilling, Chamfering and Deburring Tool. The product image is: