Analyze the need for precision of imported bearing gears
2024-02-09 12:10:32
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Analyze the need for precision of imported bearing gears
Source: Bearing network time: 2018-06-04
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Regardless of the type of doorway; grasp the quality of raw materials: high-quality raw materials for imported bearings are prerequisites for the consumption of high-quality products. After the raw materials arrive at the factory, they must pass the severe chemical composition inspection, grain size measurement and pureness identification. Timely adjustment of heat treatment deformation; quality in the advance tooth profile processing.
It is assumed that the tolerance is ±0003~±0005mm and is within the drawing of the hole. 2The accuracy of the tooth blank is ensured: the accuracy of the scale of the gear hole is required to be distributed around the two ends of the inclination value of the hole. Turn into the cutting process. The end face jump and radial runout of the tooth blank is 6; it is set in the 001~002mm plan.
Gear precision must be grasped in GB10995887~8; 3 grasp the accuracy of the gear: the accuracy of the imported bearing gear accuracy: verified by practice. The line speed is higher than 20m÷s gear; the pitch limit tendency, the ring gear radial runout, The tooth to the public service must be stable to reach the accuracy of 7 levels. In the case of 7-level precision gear; the tooth should be reversed; beware of the root boss.
It is necessary to arrive at the AA level. After the gear cutter is sharpened, it is necessary to pay attention to the radiality of the front surface of the tool, the adjacent circumferential section of the chip pocket, the maximum cumulative error of the chip pocket, and the cooperation of the imported bearing equipment. The rear side is in parallel with the inner hole axis for inspection. It does not affect the gear strength; 4 cutting tooth processing method: the purchased gear tool must be inspected. The advance tooth top height coefficient; increase 005~01m to improve the tool tip height coefficient; Gear transmission tooth root interference. M=1~2 gear adopts tooth top rounding hob; rounding amount R=01~015m to remove tooth top burr; improve tooth top interference during gear transmission. The cutting tooth is equipped with an annual precision inspection; It is not necessary to perform repairs.
Second: the inspection and repair of gears:
When the inlet shaft bears more than 004mm of journal wear; the journal wear of the bearing is 1. The chrome plate can be corrected.
When the driven gear is not more than three and not more than two adjacent, the bearing bearing ring blank is important after it is manufactured; 2 when the tooth tip end portion does not cross the tooth height of 1÷3 and the tooth width of 1÷10 Moreover, the active teeth of the damaged gear teeth are not more than 2 and are not adjacent. After the finishing and polishing, the operation is accepted.
It can be modified by the post-weld-welding method to correct the cracks of the normal teeth that are not adjacent.
When the tooth thickness wear is greater than 04mm; 4 teeth wear. Should be converted.
Weldable correction. 5 Active tooth cone shaft thread damage across two teeth.
The key tooth wears; 6 the drive bevel gear shaft has the key teeth. The entrance bearing tooth thickness wear is greater than 02mm; can be corrected by the surfacing method. Assuming a single bond; its keyway damage can be processed to the repair scale; Corrected. Or corrected by the other machining keyway method on the journal at 180° of the original keyway.
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