The National Transport University Bulletin

Abstract

The article theoretically substantiates and practically confirms the possibility of forming the end surfaces of gear teeth by rolling with a tooth-rounding roller. In the AutoCad program, the engagement of the rolled-in blanks of the knurl and the gear with the rounded end surfaces of the teeth was modeled. As a result, shaped depressions of the tooth-rounding knurl were formed, which allow forming the rounded end surfaces of the teeth by rolling. Samples of fragments of the tooth-rounding depression of the knurl and the end surface of the gear tooth were printed on a 3d printer. The obtained samples were fixed on a special rotary device to check the possibility of engagement of the shaped recess of the knurled wheel with the end surface of the gear tooth. When the samples were rolled, the model of the end surface of the tooth clearly entered and exited the model of the shaped cavity. This confirmed the inverse possibility of forming the end surface of the teeth with a modeled shaped depression. Based on the modeling results, a knurling tool with shaped tooth-rounding depressions made of steel was manufactured. The shaped depression was formed with a finger mill. On a special device, created on the basis of a lathe, the formation of the tooth-rounded end surface of the teeth was carried out using a knurling tool on bronze samples. The results of the research showed the satisfactory quality of the formation of the end surface of the teeth of the samples.

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