Grinding method for Inner Raceway of Roller Bearings

Time：2020.11.12  Source：Roller Bearings Suppliers

1. Roller dressing and grinding method

The principle of roller dressing grinding and elimination method: first, the wheel is dressed into the desired shape with the roller, and then the track is cut into for grinding with the dressed wheel.

Features of roller dressing grinding method:

Advantages of roller dressing grinding method:

(1) The shape of the grinding wheel is guaranteed by the roller, and the grinding wheel is easy to dress and time saving. It is suitable for large stomatal wheel (with large grinding grain) to grind rings of small size with fast heat dissipation, but with poor surface roughness of the workpiece.

(2) Install the workpiece at one time and grind the double raceway simultaneously.

Disadvantages of roller dressing grinding method:

(1) Different types of workpieces require different types of rollers, which are complex in work, periodic in use and of high cost. The rough surface of the grinding wheel dressed by the rollers affects the surface roughness of the workpieces.

(2) With a large grinding surface and a large cutting depth, the workpiece of the grinding wheel bears a large radial component, generating more grinding heat.

(3) There are strict requirements on the thickness of the grinding wheel. Different grinding wheels are required to process different types of workpiece, and the number of grinding wheels is large.

(4) Low grinding speed and low processing efficiency.

2. Single point dressing forming grinding method

Principle of single point dressing forming grinding: its principle is the same as that of wheel dressing grinding, but the difference lies in grinding wheel dressing method.After finishing the dressing, the diamond pen jumps out, moves the distance L, continues to dress the other side of the grinding wheel, and then grinds the workpiece with the dressing grinding wheel.

Features of single point dressing forming grinding method:

Advantages of single point dressing forming grinding method:

(1) Install the workpiece at one time and grind the double raceway simultaneously;

(2) Compared with the wheel dressing grinding method, it can reduce the cost of ordering a large number of wheels and appropriately reduce the dressing speed, which can improve the grinding wheel surface accuracy and thus improve the workpiece surface quality;

(3) It is suitable for the ring with small size before grinding with large pore wheel (large grinding grain), which has fast heat dissipation but poor surface roughness of the workpiece.Need WSBC 22314-E1A-MA-T41A,click here to learn more.

Disadvantages of single point dressing forming grinding method:

(1) Just like the roller dressing grinding, the grinding surface is large, the cutting depth is large, and the workpiece of the grinding wheel bears a large radial component, which will generate more grinding heat;

(2) There is a blind spot in the dressing method. When the grinding wheel is moved to the middle of the two sand wheels by diamond pen, it is easy to interfere with the grinding wheel due to its proximity. Therefore, the rotation Angle of Diamond pen is strict.

(3) There are strict requirements on the thickness of the grinding wheel. Different grinding wheels are required to process different types of workpiece, and a large number of grinding wheels are required;

(4) Grinding wheel dressing is complicated and time-consuming, and grinding speed is low, so the processing efficiency is low.

3. Positive and negative grinding

The principle of positive and negative grinding method: the workpiece rotates at A certain Angle (different types of workpiece rotate at different angles), and the dressed grinding wheel (with A golden pen to shape the required arc) is used to grind raceway A. After grinding, the workpiece is turned over and the same method is used to grind raceway B.

Features of positive and negative grinding:

Advantages of positive and negative grinding:

(1) The grinding surface is smaller, the cutting depth is smaller, the grinding wheel and the workpiece bear less radial force, the grinding speed is higher, and the processing efficiency is higher;

(2) Suitable for grinding rings with large size with fine grinding wheel (small grinding grain) and good surface roughness of workpiece;

(3) Simple grinding wheel dressing and time-saving;

(4) There is no requirement for the thickness of the grinding wheel, which reduces the model and quantity of the grinding wheel.

Disadvantages of positive and negative grinding:

(1) The workpiece is clamped and positioned twice, and the double raceway coaxiality and radius of curvature are prone to out-of-tolerance, and the size and position difference of the two raceways cannot be controlled in batches;

(2) The error of workpiece width H directly affects the position difference of the two raceways, so there are relatively strict size requirements for workpiece width H;

(3) Twice clamping, grinding, low processing efficiency.

4. Dislocation grinding

The principle of the dislocation grinding method: the dislocation grinding method is a new grinding method. It USES the dislocation pulsating grinding of the workpiece to realize the grinding of two raceways with two grinding wheels respectively, which minimizes the influence of grinding force and grinding heat on the machining accuracy, surface quality and grinding efficiency of the workpiece.Two grinding wheels are separated by A certain thickness of gasket, and diamond pen once dressing two grinding wheels, grinding wheel 1 grinding raceway A, after grinding, workpiece transverse pulsating, grinding raceway B with grinding wheel 2.Click here to learn more about WSBC 22226 E.

Features of dislocation grinding:

(1) The grinding surface is smaller, the cutting depth is smaller, the grinding wheel and the workpiece bear less radial force, the grinding speed is higher, and the processing efficiency is higher;

(2) Suitable for ring with large spring cutting size of fine grinding wheel (small grinding grain), good surface roughness of workpiece;

(3) Simple grinding wheel dressing, time saving, no blind spot, suitable for special or miniature ring grinding;

(4) There is no requirement for the thickness of the grinding wheel, which reduces the type and number of the grinding wheel;

(5) Once clamping and locating the workpiece, grinding the double raceway, which solves the problems of large cutting depth and high grinding heat in the roller dressing grinding method and single point dressing forming grinding method, as well as the problems of out-of-tolerance and low working efficiency in the coaxiality of double raceway in the positive and negative grinding method.