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The difference between internal hole grinding processing and Rolling Machining

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:

The difference between internal hole grinding processing and Rolling Machining

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.

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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.

What should be noted before roller burnishing tools?

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Roller burnishing tools of different models should be analyzed first.

First determine the following situations:

Is this part suitable for roller burnishing tool?

What is the workpiece material to be rolled and how hard is it?

How thick is the wall of the part that needs to be rolled? Can it bear rolling?

Is the part that needs to be rolled on the inside hole or the outside hole?

Is the part that needs to be rolled is blind hole or through hole?

……

 

These problems need to be determined before the corresponding roller burnishing tool can be selected. If you don’t know how to choose the model, please contact us to help you.

Manufacturer, Exporter, Supplier and Trader of Roller Burnishing Tools

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.

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.

 

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Application advantages – The effect after roller burnishing

Advantages of roller burnishing

 

It is safe, convenient and accurate to control precision.

Roller burnishing tools advantages are:

  • 1. Improve the surface roughness, and the roughness can basically reach the Ra less than 0.08um.
  • 2. Correction of roundness, the ellipticity can be less than 0.01mm.
  • 3. Improve the hardness of the surface to eliminate the deformation of the force and increase the hardness of HV to 40.
  • 4. After processing, the residual stress layer and fatigue strength increased by 30%.
  • 5. Improve the quality, reduce wear, and prolong the service life of the parts, but the processing cost of the parts is reduced.

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Roller burnishing tool application advantages – The effect after burnishing

 

High efficiency – a few seconds can process the surface to the desired surface precision, the efficiency is 5-20 times of grinding and 10-50 times more than the turning.

High quality – the mirror accuracy of the first step in the realization of Ra0.05-0.1um; The surface is extruded and hardened, wear resistance and fatigue strength are improved. The dimensional precision can be stable for a long time.

Economy – no need for large equipment capital, land, power consumption, waste disposal and other inputs; You don’t need a professional mechanic.

Convenient – can be installed in any rotation and feed equipment, without professional training can process the burnishing precision.

Environmental protection – no chip (protection), low energy consumption.

Safety – no cutting tool without cutting edge.

 

We are Manufacturer, Exporter, Supplier and Trader of Roller Burnishing Tools. Offered to the customers is a high quality range of Roller Burnishing Tool as per their specific requirements.