Abstract: this paper mainly Presents the process parameters, Engineering and performance of rolling tool in order to enhance the smoothness of merchandise. During the introduction of the guide to describe how to enhance the surface of the workpiece after rolling strain, the surface of the workpiece is not clean, the hints of rolling, etc.

Before The roller burnishing tool was widely used, many manufacturers utilized polishing, polishing, grinding and other techniques to enhance the surface finish of metal goods in the machining process. The honing process also has specific advantages. For Roller Burnishing Tool with higher hardness and small bore diameter, the honing tool can be utilized to complete the honing process, but its efficiency is much lower than that of the roller burnishing tool.

1.

First of all, after surface rolling, the Surface of alloy workpiece is strengthened, the ultimate strength and yield point are raised, and the hardness can be increased by 15-30%.

Abrasion resistance improved by 15%;

Fatigue limit improved by 30 percent;



The dimension tolerance can be reduced by 10-15percent by diameter calculation.

The surface roughness can reach above Ra0.2 if The overfill is appropriate and matches with other process parameters.

After rolling are smoothed, and the contact with sealing substances is smooth, which reduces the wear of sealing parts while reducing the wear of products. In terms of processing efficiency, one roster can finish the processing. High production efficiency. (finishing 100 x 300 holes at 1.5 minutes can be completed; finishing 30 x 40 holes in 10 minutes can be finished ).

2. Process parameters and requirements



1) Burnishing
Amount: when machining the internal hole of the workpiece with the roller burnishing tool, the tool diameter is set to be slightly larger than the previous machining size, rotating and feeding the tool (workpiece), and rolling the internal hole. The gap value between the diameter of the tool and the dimensions of the workpiece before processing is known as burnishing amount.

The burnishing amount is set according to the The setting of burnishing amount is usually 3 to 5 days of their surface roughness before processing, which can be ideal. When the burnishing level assortment of steel and cast iron parts is 0.04~0.07mm, its internal diameter will not change.



2) Preprocessing
Size: as the diameter size will change after rolling, the machining allowance should be left before rolling to ensure the dimensional tolerance. The variation of diameter and diameter is affected by the material, hardness and adjusting pressure of the workpiece, etc., so the conclusion of machining allowance should be made on the basis of the manufacturer’s reference value after many trials. It should be noted that the inner diameter cannot be enlarged to the same size as the diameter of the tool after adjusting, cause the enlarged inner diameter is decreased after the tool passes through as a result of elastic recovery of the substance.

3) The top limit of hardness of workpiece Processed by roller burnishing tool is HRC40.

4) so as to avoid the deformation of lean Wall parts during rolling, the wall thickness of the machining part should achieve more than 15 percent to 20 percent of their aperture.



5) The roughness of this preprocessed surface Is less than Ra3.2. At the same time, when the hardness of projecting materials is not uniform, the surface flaws of rolling pressure is going to be exposed instantly. Therefore, the quality of the rolled parts is good, and the surface flaws shouldn’t be too many.

6) The result of main rolling is greatest, and The roughness can be reduced from 2 to 3 grades.



7) The rolling process is lubricated with
Clean machine oil or sterile with petrol oil (ratio 3:7), or using special lubricating fluid provided by the manufacturer. A great deal of lubricating fluid ought to be used because the lubricating fluid should clear the small metallic powder produced from the rolling procedure. Keep the lubricating fluid clean, listen to dust filtration and prevention.

8) Rolling result is closely linked to this Previous procedure. After the present process, if the surface is too concave and Convex, the rolling strain will also increase, and also the feed quantity will be Reduced, therefore the rolling effect won’t be ideal. It is Suggested to pay Focus on the machining precision from the procedure before rolling, and cover Attention to cleaning in precisely the exact same time to prevent the chip sticking into the inner Wall of cylinder body.