The difference between grinding processing and Rolling Machining

Both the internal hole grinding process and rolling finishing process can improve the dimension accuracy of parts and reduce the surface roughness. But there are the following differences:

Internal hole grinding process

The internal hole grinding has not high requirements for the upper process, and can achieve higher precision than the rolling process. In actual production, it is difficult to reduce the temperature of grinding area in the process of inner hole grinding, and the residual tensile stress, grinding cracks and burns generated in the surface layer will be generated. These can affect the performance of parts and make the production efficiency low.

Burnishing tools, Burnishing Technology, Roller burnishing tools, surface burnishing tool

Rolling Machining

The rolling process has high requirements on the upper process, which cannot improve the shape accuracy of parts. The size is easy to control because there is no heating in the process. The residual compressive stress and cold hardening produced by the surface layer of parts can improve the performance of parts. It is highly productive.

ID Blind Roller Burnishing Tools, ID Blind Hole Roller Burnishing Tools Manufacturer & Exporter & Supplier

ID Blind Roller Burnishing Tools, Roller Burnishing Tools Manufacturer & Exporter & Supplier

What are the problems to be paid attention to in using RBT deep hole roller burnishing tool?

What is a deep hole?

In most cases, L/d is greater than or equal to 100.

Such as cylinder bore, shaft axial oil hole, hollow main shaft hole and hydraulic valve hole and so on. Some of these holes require high machining accuracy and surface quality, and some of the processed materials have poor machinability.

As we all know, for burnishing large diameter and deep hole, there are some difficulties in following:

If the cutter body is long, also there is high requirement for radial runout of clamping tool.
For cooling system, there is an inner-cooling device in the tool, so there are high requirements for equipment.
High requirement for equipment rigidity
Chip removal difficult

Problems that should be paid attention to when roller burnishing tool is used for deep hole processing.

Process dosage during rolling: Vc=20 ~ 100m/min, f=0.2 ~ 0.5mm/r, and rolling surplus is 0.05 ~ 0.15mm. Lubricant is mechanical oil.

Pay attention to the problem: the workpiece must be cleaned before rolling; Interference should be flexibly mastered, that is, the workpiece material has high hardness, thin wall, low original surface roughness, and its interference is smaller. The opposite is bigger.

Above all, RBT recommend deep hole blind hole roller burnishing tool, which the picture of real product in following:

What are the problems to be paid attention to in using RBT deep hole roller burnishing tool?

RBT deep metal blind hole roller burnishing tool

RBT blind hole roller burnishing tool

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.