Super precision craftsmanship is not only used in the bearing industry, but also has a lot of engines at present. Other precision machinery and instruments have also begun to use this process.
What is the bearing super fine?
The bearing super fine process is a kind of light processing method to achieve trace grinding.
The surface before the super -precision processing is generally cut and grinded by precision cars. Specifically, under the conditions of good lubrication and cooling conditions, use fine -grained grinders (oil stones) to apply small pressure to the workpiece, and in the direction of rotation of vertical stem workers to rotate at a certain speed, quickly and shortly to oscillate the reciprocating oscillation. A light processing method of exercise.
What is the role of bearing super research?
During the rolling bearing manufacturing process, Super fine is the end of the processing of bearing circle. It has an important role in reducing the vibration and irritability of the bearings and improving the mission of the bearings.
Specific can be reflected in the following three aspects
1. Can effectively reduce the tipline. In the process of ultra -precision research, in order to ensure that the oil and stones are always acting on the peak without contact with the valley. Removed, thereby reducing the tipline.
2. Improve the groove error of the ball bearings. Super Research can effectively improve the trench error of about 30%.
3. Can make the superb research surface compressively. In the process of superb research, cold -plastic deformation is mainly produced, so that after the superb research, the surface of the workpiece forms residual compression stress.
4. Can increase the contact area of the working surface of the kit. After the superb research, the area contact area of the working surface can be increased from 15%to 40%after grinding to 80%to 95%.
Bearing super fine process:
1. Cut of bearing
When the surface of the grinding stone is in contact with the convex peaks on the rough track surface, due to the small contact area and the unit area of the area is large, under a certain pressure, the millstone is first affected by the "anti -cutting" effect of the bearing workpiece, so that Part of the grinding particles on the surface of the grinding stone fall off and shattered, exposing some new sharp abrasive particles and blade edges. At the same time, the surface convex peaks of the bearing workpiece are rapidly cut, and the convex peaks and grinding deterioration layers on the surface of the bearing of the bearing of the bearing of the bearing of the bearing of the bearing and cutting are the surface. This stage is called the cutting phase, and most of the metal balance is removed at this stage.
2. Half -cutting of the bearings
As the processing continues, the surface of the bearing workpiece is gradually smoothed. At this time, the surface contact area of the millstone and the workpiece increased, the pressure on the unit area decreased, the depth of cutting was reduced, and the cutting capacity weakened. At the same time, the pores on the surface of the millstone are blocked, and the millstone is in a half -cut state. This stage is called the semi -cut stage of bearing processing. The surface cutting marks of the bearing of the bearing of the bearing of the bearing of the bearing stage become lighter and darker.
3. The whole stage of light
This stage can be divided into two steps: one is the grinding transition stage; the other is to stop the grinding stage after cutting
Grinding transition stage:
The abrasive particles decreased sharply, the abrasive blade edges were smoothed, and the crumb oxides began to embed the gap of oil and stones. The abrasive powder powder blocked the oil and stones, so that the abrasive particles can only be cut weakly, accompanied by squeezing and research. At this time, the surface of the workpiece The roughness is quickly decreased, and there are black crumb oxides on the surface of the oil.
Stop cutting and grinding stage:
The rubbing of oil stones and workpieces has been smooth, the contact area has increased significantly, and the pressure drop is reduced. The abrasive particles can no longer be in contact with the workpiece. When the oil membrane pressure on the support is balanced with the oil stones pressure, the oil stones are floating. During the formation of oil membrane, the cutting effect was no longer available. This stage is unique to super fine processing.