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Roller Burnishing Tool - coyleduke15utttyx Roller Burnishing Tool

coyleduke15utttyx — Roller Burnishing Tool

Abstract: this paper mainly Presents the process parameters, Engineering and performance of rolling instrument so as to improve the smoothness of merchandise. During the introduction of the article to describe how to improve the surface of the workpiece after rolling strain, the surface of the workpiece isn't clean, the hints of rollingup, and so on.

Before That the roller burnishing tool was widely used, many factories used polishing, honing, grinding and other techniques to enhance the surface finish of metal products in the machining process. The honing process also has certain advantages. For some internal holes with higher hardness and small bore diameter, the honing tool can be used to finish the honing process, but its efficiency is a lot lower than the roller burnishing tool.

1.

First of all, after surface rolling, the Surface of alloy workpiece is reinforced, the best strength and yield point are increased, along with the hardness can be increased by 15-30%.

Abrasion resistance improved by 15%;

Fatigue limit improved by 30%;



The measurement tolerance can be reduced by 10-15% by diameter calculation.

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



Second, the surface micro-protuberances After rolling are smoothed, and the contact with sealing materials is smooth, which reduces the usage of sealing components while reducing the wear of products. Concerning processing efficiency, one roster can complete the processing. (completing 100 x 300 holes in 1.5 minutes could be finished; completing 30 x 40 holes in 10 seconds can be finished ).

2. Procedure parameters and requirements

Amount: when machining the internal hole of the workpiece using the roller burnishing tool, the tool diameter is defined to be slightly larger than the preceding machining size, rotating and feeding the instrument (workpiece), and rolling the inner hole. The gap value between the diameter of the tool and the dimensions of the workpiece before processing is called burnishing amount.

The burnishing amount is set based on this The setting of burnishing amount is generally 3 to 5 days of their surface roughness before processing, which can be ideal. When Roller Burnishing Tool is steel, the burnishing amount ranges from 0.04 to 0.07mm to obtain the most perfect surface. When the burnishing amount range of steel and cast iron components is 0.04~0.07mm, then its own internal diameter won't change.



2) Preprocessing
Dimensions : since the diameter size will change after rolling, the machining allowance should be left before rolling to guarantee the dimensional tolerance. The variation of diameter and diameter is affected by the substance, hardness and rolling strain of the workpiece, etc., so the conclusion of machining allowance should be made on the basis of the company's reference value after several trials. It should be mentioned that the inner diameter can't be enlarged to the same size as the diameter of the tool after rolling, cause the enlarged inner diameter is decreased following the instrument passes through as a result of elastic recovery of this material.

3) The upper limit of hardness of workpiece

4) In order to avoid the deformation of thin Wall parts during rolling, the wall thickness of the machining part should reach more than 15% to 20 percent of their aperture.

At exactly the same time, once the hardness of projecting materials is not uniform, the surface defects of rolling pressure will be exposed instantly. Hence, the standard of the wrapped parts is great, and the surface defects shouldn't be too many.

6) The result of primary rolling is best, and The roughness can be reduced from 2-3 grades.

Clean machine oil or lubricated with petrol oil (ratio 3:7), or with specific lubricating fluid offered by the manufacturer. A large amount of lubricating fluid should be utilized because the lubricating fluid should clear the little metal powder produced from the rolling procedure. Maintain the lubricating fluid clean, pay attention to dust filtration and prevention.

8) Rolling effect is closely linked to the Previous process. After the current process, if the surface is too concave and Convex, the rolling pressure will also grow, and also the feed quantity will be Reduced, so the rolling effect won't be ideal. It's Suggested to pay Attention to the machining precision from the process before rolling, and pay Attention to cleaning in the same time to avoid the chip sticking to the inner
© coyleduke15utttyx 30 мая 2018 20:40