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

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?

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.

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.

Can roller burnishing tool be used to process thin-walled parts?

Q: Can roller burnishing tool be used to process thin-walled parts?

A: Burnishing rolling process is used to press the surface of the workpiece.

Therefore, in order to withstand the treatment pressure, the treated part needs to have enough wall thickness (20% of the inner diameter). Thin – walled parts will be deformed or damaged after processing.

This problem is usually solved by the following methods:

Reduce roll pressure allowance.
Use pliers to support the outside of the workpiece.
The rolling pressure is arranged in the first step (before forming the thin-walled workpiece).

According to the parameters of the workpiece, a special auxiliary tool for thin-walled parts should be designed.