| Summary: | 碩士 === 國立高雄應用科技大學 === 精密模具與機械產研碩士外國專班 === 99 === Hydro-mechanical deep drawing (HDD) combines the features of conventional
deep drawing and hydroforming. In this process, the punch deforms the blank to its final
shape by moving against a controlled pressurized fluid. Hydro-mechanical deep drawing
offers several advantages over conventional deep drawing such as higher drawability,
uniform strain distribution, better surface finish and improved dimensional accuracy. The
process parameters have strong influence on the thickness distribution of the deformed
part. In view of this, the effect of the pressure, the blank holder force, the punch speed,
the pre-bulging pressure, and the friction coefficient on the thickness distribution in
hydro-mechanical deep drawing were studied on stainless steel SS304 sheets. The
process parameters are optimized according to the Taguchi method with an orthogonal
array L16 of four factors and four levels for each factor. The results show that the friction
plays the most significant role, then the punch speed, and third the blank holder force. On
the other hand, the influences of chamber pressure and the pre-bulging pressure are
negligible
|
|---|
