HYDRO-MECHANICAL ENGINE

Hydro-Mechanical Engine

Hydro-Mechanical Engine

Hydro-mechanical deep drawing is a new sheet metal forming technology originating from hydroforming technology. It combines the features of both traditional deep-drawing technology and hydroforming technology. In hydro-mechanical deep drawing the limit drawing ratio (LDR) values can reach 2.8 compared with the traditional deep-drawing process where the LDR values are only about 2.2. Since its inception, the hydro-mechanical deep-drawing process has found increasing application in industry, such as application in automobile and aircraft manufacture. After continuous improvement and innovation, much specialized equipment and many devices have also been devised and put into use. The hydro-mechanical deep-drawing process can replace some other metal forming processes, because this process can improve the quality of the product without losing productivity.

Hydro-mechanical deep-drawing technology was first developed in 1890 . However, the real development began after the second world war. Early research work began mainly in Germany and Japan.

Japanese researchers began investigating the process in 1955. Kasuga et al. first proposed pressure-lubricated deep drawing and was in charge of the research work in this field from 1958 to 1964. After the mid 1970s, Nakamura and Nakagawa began their research work on the hydraulic counter-pressure fluid-forming process (the FF method). The radial-pressure deep-drawing method was proposed during this period.

German researchers began their work in the 1950s . A seal-ring on the die face was used in order to prevent the leakage of fluid between the die and the blank.

Dutch researchers presented the daalderop method in 1961 and American researchers began research on the aqua-draw method in 1973. AP & T of Sweden began researching the process and devices in the 1960s, supplying specialized equipment and devices . Larsen , a Danish researcher, published a paper on work in Denmark in 1977, the research at present being continued by Danckert andersen et al. ...