Knurling process for bearing position interference assembly and knurling shaft

Abstract

The invention discloses a knurling process for bearing position interference assembly. The knurling process comprises the steps that a shaft with a bearing position to be subjected to diameter increase is horizontally clamped on a three-jaw self-centering chuck of a lathe, and a hatching knurling tool is mounted on a lathe tool holder; then the lathe is turned on and a cooling lubricant on the lathe is started; a lathe drag plate is shaken to make the hatching knurling tool move toward the bearing position of the shaft, and the hatching knurling tool and a bearing position surface of the shaftare in rolling contact under certain pressure, convex net lines are knurled by extrusion on the bearing position surface of the shaft, and the shaft with the net lines at the bearing position is formed. A knurling shaft includes a main shaft section, a first ring boss section, a second ring boss section, a third ring boss section, a fourth ring boss section and a fifth ring boss section successively from front to back; the circumferential surface of the second ring boss section and the circumferential surface of the fourth ring boss section are all provided with the net lines formed by processing through the knurling process.

Description

technical field [0001] The invention relates to the technical field of shaft processing, in particular to a treatment process for increasing the diameter of a bearing installation position of a shaft, in particular to a bearing position interference assembly knurling process and a knurled shaft using the process. Background technique [0002] In the machining and manufacturing industry, shaft parts often encounter the situation that the size of the bearing used to install the bearing is too small during processing, which will cause the bearing assembled on the shaft to loosen easily and cannot be used. When this happens, if the entire shaft is scrapped due to a small error in processing, it will cause a large waste of manpower and material resources. Therefore, how can the assembly accuracy be not very high and the shaft diameter is small In not many cases, it is very important to increase the diameter of the bearing assembly on the shaft to meet the tight fit installation r...

AI Technical Summary

Problems solved by technology

[0002] In the machining and manufacturing industry, shaft parts often encounter the situation that the size of the bearing used to install the bearing is too small during processing, which will cause the bearing assembled on the shaft to loosen and cannot be used

When this happens, if the entire shaft is scrapped due to a small error in processing, it will cause a large waste of manpower and material resources. Therefore, how can the assembly accuracy be not very high and the shaft diameter is small In not many cases, it is very important to increase the diameter of the bearing assembly on the shaft to meet the tight fit installation requirements of the bearing

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