| Summary: | 博士 === 國立交通大學 === 機械工程系所 === 96 === Abstract
Gear cutters are widely used in the industry. To meet various requirements, they are designed with complicated tooth profiles so that it’s very time consuming for manufacture. This dissertation proposes a novel manufacturing process. Part of the complicated tooth profile is replaced by that generated by a special designed hob cutter. This hob cutter is designed considering various design criteria. Not only the efficiency can be improved, but the performance of the manufactured gear cutter could also be better. Three different cases are investigated in this dissertation: (1) the gear shaving cutter, (2) the negative rake knife, and (3) the gear hob cutter.
Traditionally, the relief portion of shaving cutter is manufactured by drilling or milling, which are all time-consuming processes. It becomes extremely difficult especially when the module of shaving cutter becomes small. With the proposed manufacturing process, the relief portion could be generated efficiently by a specially designed and optimized gear hob cutter. With the hobbed relief portion, the shaving cutter becomes stronger and hence performs better.
The rotary knife with negative rake, in tradition, is manufactured by form milling. The efficiency is low, and the design of profile is also limited. With the proposed manufacturing process, tooth profile of the rotary knife could be generated by a specially designed hob cutter. The manufacturing efficiency is improved, and profile of the knife could also be properly modified by changing the parameters of hob cutter for better performance.
The traditional way to manufacture the gashes of gear hob cutter is to mill it one by one, but the efficiency is quite low. With the proposed manufacturing process, the gashes could be generated by another specially designed hob cutter so that the manufacturing efficiency could be improved 2~3 times.
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