A method and device for forming by internal pressure expansion and reverse deep drawing

Abstract

The invention discloses a forming device based on internal compressive expansion and reserve deep drawing. The device comprises a base with a built-in cavity, wherein shafts penetrate through the samepositions of the opposite sides of the base, the end, located in the base, of each shaft is connected with a rack, an upper die is connected between the two racks, a lower die is connected between the two racks, the top of the upper die and the top of the lower die is respectively provided with a hole, the upper die and the lower die are connected with the same fluidized medium pressure transmission system through the holes, and the fluidized medium pressure transmission system is connected with a pressure pump. In the process, a blank is cast just now, its internal material does not solidifycompletely, blank reheating is not needed, and energy is saved. Different dies are selected and installed according to different demands, and installation is rapid. The device also has the advantagesof being simple in structure and convenient to use. By adopting a method based on internal compressive expansion and reserve deep drawing, the pressure requirement for the device is low, and blanks are uniform in deformation stress and easy to form.

Description

technical field

[0001] The invention belongs to the technical field of plastic forming equipment, and in particular relates to an internal compression expansion type and reverse deep drawing forming device, and also relates to an internal compression expansion type and reverse deep drawing forming method. Background technique

[0002] Pressure vessels are important equipment in petroleum, chemical, energy and other industries. With the development of my country's social economy, pressure vessels in nuclear power, coal chemical industry, oil refining, petrochemical, military and other industries are showing a trend of large-scale development, especially large With the appearance of hydrogenation reactors with large diameter and large wall thickness, coal liquefaction reactors, nuclear reactor shells, etc., large-scale heads have emerged as the times require. In order to ensure long-term high-efficiency operation of equipment under high temperature and high pressure, the size o...

Examples

Embodiment Construction

[0020] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] The present invention is an internal compression expansion type and reverse deep drawing forming device, such as figure 1 As shown, the base 2 comprising a built-in cavity has a shaft 14 passing through the same position on the opposite side of the base 2, and one end of each shaft 14 outside the base 2 is connected to the drive mechanism, and the other end of each shaft 14 is The frame 12 is connected by the pin 6, so that the shaft 14 can drive the frame 12 to rotate together, and an upper mold 11 is connected between the two frames 12, and a lower mold 1 is connected between the two frames 12, and the upper mold 11. A hole is respectively opened on the top of the lower mold 1, and the upper mold 11 and the lower mold 1 are respectively connected to the same fluid medium pressure transmission system through the holes, and the fluid m...

technical field

[0001] The invention belongs to the technical field of plastic forming equipment, and in particular relates to an internal compression expansion type and reverse deep drawing forming device, and also relates to an internal compression expansion type and reverse deep drawing forming method. Background technique

[0002] Pressure vessels are important equipment in petroleum, chemical, energy and other industries. With the development of my country's social economy, pressure vessels in nuclear power, coal chemical industry, oil refining, petrochemical, military and other industries are showing a trend of large-scale development, especially large With the appearance of hydrogenation reactors with large diameter and large wall thickness, coal liquefaction reactors, nuclear reactor shells, etc., large-scale heads have emerged as the times require. In order to ensure long-term high-efficiency operation of equipment under high temperature and high pressure, the size o...

Examples

Embodiment Construction

[0020] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] The present invention is an internal compression expansion type and reverse deep drawing forming device, such as figure 1 As shown, the base 2 comprising a built-in cavity has a shaft 14 passing through the same position on the opposite side of the base 2, and one end of each shaft 14 outside the base 2 is connected to the drive mechanism, and the other end of each shaft 14 is The frame 12 is connected by the pin 6, so that the shaft 14 can drive the frame 12 to rotate together, and an upper mold 11 is connected between the two frames 12, and a lower mold 1 is connected between the two frames 12, and the upper mold 11. A hole is respectively opened on the top of the lower mold 1, and the upper mold 11 and the lower mold 1 are respectively connected to the same fluid medium pressure transmission system through the holes, and the fluid m...

Images