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.

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.

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

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

 

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Recognize the structure of roller burnishing tool

Recognize the structure of roller burnishing tool

In the process of many industrial machinery, we will use a variety of mechanical equipment and tools, without these tools, our work can not be carried out smoothly. Roller burnishing tool is an important tool.

What about the structure of roller burnishing tool? How does it work?

Description of Internal Diameter Roller Burnishing Tool

This is what everyone is concerned about. Now let’s understand the structure and composition of the roller blade, as well as the relevant matters needing attention during its use. Roller burnishing tool adopts combined type, and different models are selected according to the length of each workpiece, number and position of annular groove. Roller burnishing tool consists of roller blade and sleeve, which is locked with nut. The entire knife body is placed in the holes of the left and right wall panels. Right and left wall board hole is open close type, namely half side hole is on wall board, another half side hole is on right and left pressing board. The left and right bearings are sliding bearings that are equally divided into two halves to facilitate the loading and unloading of the mounting roller blades and sleeves. The right and left press-plates press the rolling cutter body onto the wallboard and fix it with screws. The swing arm rotating shaft, driving shaft and eccentric shaft are installed on a pair of wallboard. Adopt double eccentric shaft top and right swing arm to make the work smooth. The workpiece positioning is fixed on the middle pinion shaft, which can be adjusted to make sure the workpiece is in the right position. Roller burnishing tool is made of alloy tool steel Cr12MoV and quenched to HRC58 ~ 60. The user requires the service life to be able to process 100,000 workpieces. In fact, the service life is more than 3 times as expected. The roller is made of 45 steel, hardened to about HRC45, and its working life is much longer than that of the knife.

RBT roller burnishing tool has strict requirements from material selection to processing, so that the product quality can be guaranteed. If you want to buy the products such as roller cutter and roller tool, you are welcome to come to our company to choose. Our products are of good quality and the price is also very good.

What should be noted before roller burnishing tools?

How to select roller burnishing tool, Roller burnishing tool attention points, Roller burnishing tool model, Buy roller burnishing tool, Roller burnishing tool problem

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?

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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.