Single-die forming device and method of thin-wall deep parabolic drawing part

Abstract

The invention discloses a single-die forming device of a thin-wall deep parabolic drawing part and belongs to the technical field of single-die formation. The single-die forming device comprises an upper plate, a pressure head, a blank holder, a forming medium, a die and a lower plate; the pressure head comprises a cylindrical section and a circular-arc head section in smooth transition with the cylindrical section; the blank holder is a cylinder with an axial through hole; the upper plate is mounted on a main slider of a common double-action hydraulic press, while the lower plate is mounted on a double-action hydraulic press platform; the die is fixed on the lower plate; a blank is placed on the die to seal a cavity of the die; the blank holder is mounted on a blank pressing slider of the common double-action hydraulic press and holds down the blank; the forming medium is located within an inner cylinder formed by the axial through hole of the blank holder and the blank; the cylindrical section of the pressure head is fixed on the upper template; the circular-arc head section of the pressure head is in hole-shaft fitting with the axial through hole of the blank holder and props against the forming medium in the axial through hole of the blank holder; the device is few in forming steps and low in cost.

Description

technical field [0001] The invention belongs to the technical field of precision forming, and in particular relates to a single-mode forming device and method for a thin-walled deep parabolic drawing part. Background technique [0002] The parabolic stretched part with a depth-to-diameter ratio h / d greater than 0.6 (h: part height, d: part opening diameter), relative wall thickness t / D<0.5% (t: blank thickness, D: blank diameter) is a thin-walled deep parabola Shaped stretched parts are mostly used for the rectification device of the intake and exhaust ports of turbine engines or other devices. The forming process of such stretched parts is easy to form "inner wrinkles" and thinning and cracking. At present, the main forming methods are steel mold forming and filling Liquid stretch forming. [0003] Figure 1-3 It is a schematic diagram of the steel mold multiple forming process, where figure 1 is the arc transition method, figure 2 is the step transition method, i...

AI Technical Summary

Problems solved by technology

[0004] 1. Multiple sets of molds and multiple moldings are required, and the one-time investment in the mold is relatively large

[0005] 2. Multiple heat treatments are required in the middle of multiple forming processes, resulting in many forming processes, low production efficiency and high cost

[0006] 3. Repeated forming is easy to form seams at the forming joints, and the product forming quality is poor

[0008] 1. Special equipment is required. Most of the equipment used in industrial production is imported from abroad. The price of the equipment is far higher than that of ordinary presses, and the one-time investment is relatively large.

[0009] 2. It is difficult to seal the liquid during the forming process, and it is easy to cause stretching failure due to sealing problems and cause oil splashes

[0010] 3. There are strict requirements on the forming parameters, and the forming process is prone to forming failure due to poor parameter matching

Images