ball bearing turntable made in china

1. Inspection of ball bearing parts

Check the appearance for bumps or rust spots, if there are serious bumps, rework, check the external dimensions, check whether the workpiece is consistent with the assembly drawings.

avoid missing processes after equipment and rework, carefully check the inner and outer ring raceways to find the soft belt, in the corresponding Mark S on the ball bearing plane, and find the number of grinding parts, and place the inner and outer rings with the same number accordingly.

2. Rust removal

If there are rust spots on the ball bearing parts, lightly rub with a scouring pad and cleaning agent for slight rust, and use an angle grinder to install a film for serious rust (except raceway).

3. Remove slewing bearing burrs and bumps

Pay attention to check the installation holes, oil holes, the chamfers of the inner and outer rings and the sealing grooves for burrs and bumps, and polish them with scouring pads or sandpaper.

4. Blocking and grinding requirements

Find the small end of the taper pin, take out the taper pin, and then use a puller to pull out the blockage, grind the edge of the blockage so that there are no burrs and sharp places, and grind it thoroughly to prevent abnormal noise from the ball bearing after assembly.

5. Clean the slewing bearing

Clean the workpiece, use compressed air to blow off the processing residues (fine iron grinding, grinding) on ​​the inner and outer rings of the ball bearing and in the mounting holes, then use kerosene or diesel to clean the workpiece, and then load it into the assembly area.

6. Slewing bearing with rolling elements

Use a wooden block to padded a ferrule with a blockage to make it fixed and cannot be rotated, and then insert another ferrule (the large one is suspended with a crane), so that the positions of the inner and outer ring channels are in a parallel state, and put in a few grains first.

The rolling elements are dispersed in a circle, support the non-clogging ferrule, and then rotate the non-clogging ring to install other rolling elements and spacers according to the number required in the drawing.

so that they are evenly distributed in the raceway, check the remaining gaps in the raceway, and use a thick Or thin spacer block to adjust the gap, the gap should not be larger than the length of one spacer block.

to prevent the ball bearing from being stuck due to the overturning of the spacer block, and then install the plug and taper pin, both ends of the taper pin should be lower than the plane.

7. Detection

Detect all drawing size requirements, detect whether the rotation is flexible, whether there is noise, axial clearance, radial clearance, end face runout, tooth runout, inner and outer diameter runout, finished product height, starting torque, etc.

8. Oil filling seal

After passing the test, put it into the grease nipple, then inject grease as required, install the seal and stick the interface, type, and finally demagnetize to check the appearance.

9. Packaging

The finished product is coated with anti-rust oil, first wrap the first layer with a transparent oil-repellent film, then wrap the second layer with kraft paper, and then wrap the third layer with plastic wrapping film or according to customer requirements, and finally label the product and pack it.

2.How to choose the clearance of ball bearing /gear slewing drive?

The clearance of the geared slewing drive refers to the clearance of the slewing bearing installed inside the geared slewing drive, so how to choose the clearance of the geared slewing drive?

Bearing clearance is the gap between the ball bearing rolling element and the inner and outer ring grooves of the bearing. Specifically, it is a finished ball bearing that is not installed and used.

Fix one of the outer or inner rings of the bearing, and then make the unfixed ring in the axial direction. Or radial movement, the movement of the unfixed ring is the clearance value of the bearing, and the clearance value of the bearing can be measured with a dial indicator and a magnetic meter seat. According to the different moving directions, the clearance is divided into axial clearance and radial clearance.

The axial movement of the ferrule is the axial clearance, and the radial movement of the ferrule is the radial clearance. The clearance when the bearing is running is called the working clearance.

The working clearance has an impact on the service life of the ball bearing, the temperature rise of the ball bearing, the vibration of the equipment and the noise of the equipment.

The clearance of the gear type rotary drive is generally divided into large clearance, small clearance and negative clearance, and different clearances are selected according to different working conditions.

1. The large clearance gear type rotary drive is generally used in the working conditions with low precision requirements, slow rotation speed, no overturning moment or small overturning moment. For example, many automation equipment only requires the gear-type slewing drive to provide the function of support and rotation.

The speed is very low, and it does not require precision and no eccentric load. The gear-type slewing drive with large clearance is very suitable for this working condition. Large clearance also has a great advantage.

If the customer’s installation foundation is difficult to machine and level, after the gear type rotary drive with small clearance is installed on the foundation, there may be a situation where the rotation resistance is large or cannot be rotated at all.

This phenomenon does not occur in the gear-type rotary drive with clearance, because the large clearance can resist the deformation of the gear-type rotary drive caused by the uneven foundation after installation, and the rotation is still flexible after installation.

2. The small clearance gear type rotary drive is generally used in the working conditions with high precision requirements, high speed and overturning moment. If the clearance is too large, it will affect the rotation accuracy of the ball bearing, which is not conducive to the stable operation of the equipment.

At high speed, the large clearance will cause the rotary drive to vibrate and generate noise. Especially when the high speed is installed vertically, a small clearance must be used. . Excessive clearance under the condition of overturning moment will cause unstable rotation and affect the normal use of the equipment.

Therefore, the precision requirements are high, the speed is fast, and the small clearance gear type rotary drive is suitable for the working condition with overturning moment.

3. Negative clearance gear type rotary drives are generally used in occasions with particularly high precision requirements. Under the working conditions with particularly high precision requirements, the clearance will not only affect the rotary accuracy, making the equipment unable to run smoothly, and will affect the transmission of the rotary drive.

Under the condition of high precision and large output torque, the clearance will directly affect the transmission accuracy of the teeth, increase the backlash of the teeth, and reduce the transmission accuracy. Negative clearance in high-precision applications can also keep the equipment accurate for a long time, reduce the frequency of equipment maintenance, and prolong the service life of the equipment.

The negative clearance gear slewing drive has very strict requirements on the installation foundation, and the installation foundation must be flat enough, otherwise the slewing drive will not rotate smoothly, get stuck, or even fail to rotate.