Roller Burnishing Tool
Abstract: this paper mainly introduces the Procedure parameters, Technology and operation of rolling instrument so as to enhance the smoothness of products. Through the introduction of this article to explain how to improve the surface of the workpiece after rolling strain, the surface of the workpiece is not clean, the hints of rollingup, etc.
Before Roller Burnishing Tool was widely used, many factories utilized polishing, polishing, grinding and other methods to enhance the surface finish of metal goods in the machining procedure. The honing procedure also has certain benefits. For some inner holes with high hardness and little bore diameter, the honing tool can be utilized to complete the honing procedure, but its efficacy is much lower than the roller burnishing tool.
1. Processing effect
First of all, after surface rolling, the Surface of alloy workpiece is strengthened, the ultimate strength and yield point are raised, along with the hardness can be increased by 15-30%.
Abrasion resistance increased by 15 percent;
Fatigue limit improved by 30 percent;
10-15% by diameter calculation.
The surface roughness can attain over Ra0.2 if The overfill is suitable and matches with other process parameters.
Secondly, the surface micro-protuberances After rolling are smoothed, and the contact with sealing materials is smooth, which lessens the usage of sealing components while reducing the usage of merchandise. Concerning processing efficiency, 1 roll can complete the processing. (completing 100 x 300 holes in 1.5 minutes could be completed; completing 30 x 40 holes in 10 seconds can be finished ).
2. Procedure parameters and requirements
1) Burnishing
Amount: if machining the internal hole of the workpiece using the roller burnishing tool, the tool diameter is defined to be slightly larger than the previous machining size, rotating shaft and feeding the instrument (workpiece), and rolling the inner hole. The gap value between the width of the tool and also the size of the workpiece before processing is called burnishing amount.
The burnishing level is set according to this Material and wall thickness. The setting of burnishing amount is generally 3 to 5 days of their surface roughness prior to processing, which can be ideal. When the burnishing amount assortment of steel and cast iron components is 0.04~0.07mm, then its internal diameter will not change.
Size: as 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 size is influenced by the substance, hardness and rolling strain of the workpiece, etc., so the determination of machining allowance should be made on the basis of the company's reference value after several trials. It should be noted that the inner diameter can't be enlarged to the identical size as the width of the tool after adjusting, because the enlarged inner diameter is reduced following the tool passes through due to the elastic recovery of the substance.
3) The top limit of hardness of workpiece Processed by roller burnishing tool is HRC40.
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% of their aperture.
At exactly the exact same time, when the hardness of casting materials is not uniform, then the surface defects of rolling pressure is going to be exposed immediately. Therefore, the standard of the rolled parts is great, and also the surface defects should not be too many.
6) The result of primary rolling is greatest, and The roughness can be reduced from 2 to 3 grades.
Clean machine acrylic or lubricated with diesel oil (ratio 3:7), or with special lubricating fluid provided by the manufacturer. A great deal of lubricating fluid ought to be utilized cause the lubricating fluid should clear the small metal powder produced in the rolling process. Keep the lubricating fluid clean, listen to dust prevention and filtration.
8) Rolling result is closely linked to the Previous procedure. Following 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, so the rolling result will not be ideal. It's recommended to pay Attention to the machining precision from the procedure before rolling, and cover Focus on cleaning in the exact same time to avoid the chip sticking into the inner
Before Roller Burnishing Tool was widely used, many factories utilized polishing, polishing, grinding and other methods to enhance the surface finish of metal goods in the machining procedure. The honing procedure also has certain benefits. For some inner holes with high hardness and little bore diameter, the honing tool can be utilized to complete the honing procedure, but its efficacy is much lower than the roller burnishing tool.
1. Processing effect
First of all, after surface rolling, the Surface of alloy workpiece is strengthened, the ultimate strength and yield point are raised, along with the hardness can be increased by 15-30%.
Abrasion resistance increased by 15 percent;
Fatigue limit improved by 30 percent;
10-15% by diameter calculation.
The surface roughness can attain over Ra0.2 if The overfill is suitable and matches with other process parameters.
Secondly, the surface micro-protuberances After rolling are smoothed, and the contact with sealing materials is smooth, which lessens the usage of sealing components while reducing the usage of merchandise. Concerning processing efficiency, 1 roll can complete the processing. (completing 100 x 300 holes in 1.5 minutes could be completed; completing 30 x 40 holes in 10 seconds can be finished ).
2. Procedure parameters and requirements
1) Burnishing
Amount: if machining the internal hole of the workpiece using the roller burnishing tool, the tool diameter is defined to be slightly larger than the previous machining size, rotating shaft and feeding the instrument (workpiece), and rolling the inner hole. The gap value between the width of the tool and also the size of the workpiece before processing is called burnishing amount.
The burnishing level is set according to this Material and wall thickness. The setting of burnishing amount is generally 3 to 5 days of their surface roughness prior to processing, which can be ideal. When the burnishing amount assortment of steel and cast iron components is 0.04~0.07mm, then its internal diameter will not change.
Size: as 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 size is influenced by the substance, hardness and rolling strain of the workpiece, etc., so the determination of machining allowance should be made on the basis of the company's reference value after several trials. It should be noted that the inner diameter can't be enlarged to the identical size as the width of the tool after adjusting, because the enlarged inner diameter is reduced following the tool passes through due to the elastic recovery of the substance.
3) The top limit of hardness of workpiece Processed by roller burnishing tool is HRC40.
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% of their aperture.
At exactly the exact same time, when the hardness of casting materials is not uniform, then the surface defects of rolling pressure is going to be exposed immediately. Therefore, the standard of the rolled parts is great, and also the surface defects should not be too many.
6) The result of primary rolling is greatest, and The roughness can be reduced from 2 to 3 grades.
Clean machine acrylic or lubricated with diesel oil (ratio 3:7), or with special lubricating fluid provided by the manufacturer. A great deal of lubricating fluid ought to be utilized cause the lubricating fluid should clear the small metal powder produced in the rolling process. Keep the lubricating fluid clean, listen to dust prevention and filtration.
8) Rolling result is closely linked to the Previous procedure. Following 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, so the rolling result will not be ideal. It's recommended to pay Attention to the machining precision from the procedure before rolling, and cover Focus on cleaning in the exact same time to avoid the chip sticking into the inner
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