Abstract: In the process of sheet metal forming (SHD), aluminum sheet metal hydroforming and processing, the sheet blank is formed by the hydraulic pressure in the cavity. This technique allows for deeper stretching, which is necessary to make complex curved panels.

the sheet metal hydroforming Process and schematic diagram:

1. Introduction to sheet metal forming:

In the sheet metal forming (SHD) process, the sheet blank is formed by hydraulic pressure in the cavity, which allows for deeper stretching, which is necessary to make complex curved panels. Sheet metal forming can be divided into two parts: hydro-mechanical drawing (HMD) and high-pressure veneer and multi-plate blank hydroforming.

Second, hydraulic mechanical drawing:

In addition to applying back pressure on the other side of the punch, this sheet hydroforming is similar to conventional deep drawing. The hydraulic mechanical drawing has no lower die, but the hydraulic pressure is applied when the punch presses the blank downward, and the back pressure is controlled by a servo valve or a proportional valve, and the hydraulic pressure increases the drawing ratio and the corner filling rate.

Third, the high pressure plate hydroforming introduction:

Sheet hydroforming technology is the result of a combination of deep drawing and hydroforming. The blank in the edger is placed in the mold and pressure is applied to fill the mold cavity; the advantage of this process is that it can be deep-drawn by controlling the flow of metal into the cavity, and the hydraulic fluid passes through the overall drawing during the hydroforming process. Formed and pumped between the blanks. The mold cavity is hydraulically driven, the upper and lower molds are formed, and the position of the upper punch can also be changed. In terms of accuracy, high pressure plate hydroforming has better forming accuracy than conventional deep drawing methods.

The Molding product:

Another benefit is that only one mold or punch forming process is required, thereby reducing the time and cost of mold design and manufacturing.

For a variety of production types especially low to medium production. There are other types of hydroforming processes that differ slightly from the above, such as liquid impact forming and bending.