Optimization of tool geometric parameters for a small fluteless forming tap (FFT)

Autor: Ling-Sheng Hsu, chung-chen Tsao, Wei-Rong Jian, Ming-Chang Wu
Rok vydání: 2022
Předmět:
Zdroj: The International Journal of Advanced Manufacturing Technology. 120:3437-3449
ISSN: 1433-3015
0268-3768
DOI: 10.1007/s00170-022-08955-1
Popis: A small blind internal thread (SBIT) is used to firmly fasten some functional components to the cover of 3C electronic products. The small internal thread is made in a blind hole using a fluteless forming tap (FFT) that does not produce chips. However, the four geometric parameters (tool width (W), tooth root diameter (D2), front-end diameter (Df) and tooth angle (θ)) for the FFT affect the thread filling rate (f) and the minimum torque (T) for the tapping process. This study reports a Box-Behnken design (BBD) using DEFORM-3D (finite element model) and MINITAB (regression analysis) software to tap 7075-T6 aluminum alloy using a small FFT to achieve a repeatable thread filling rate and minimum torque. The experimental results show that the BBD accurately predicts and simulate the thread filling rate for tapping 7075-T6 aluminum alloy. The modelling software and the experimental design for this study can be used to optimize the design of tools that are used in industrial production.
Databáze: OpenAIRE
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