Forming device for metal plastic extrusion forging

Abstract

The invention discloses a forming device for plastic swaging forming of metal. The forming device comprises an upper mold, a lower mold and an upper mold driving mechanism, wherein the upper mold driving mechanism is connected with the upper mold; the upper mold is provided with an upper mold cavity, an upper swaging assembly and a first swaging channel, and the first swaging channel is communicated with the upper mold cavity; the lower mold is provided with a lower mold cavity matched with the upper mold cavity to form a sealed mold cavity; the upper swaging assembly comprise a hole extruding head, an upper swaging head and a hole extruding driving mechanism, the upper swaging head is connected with the upper mold driving mechanism, the hole extruding head is arranged in the upper swaging head along a swaging direction in a sliding manner, and the hole extruding driving mechanism is used for driving the hole extruding head to stretch out of the upper swaging head to extrude holes in a blank, retracting the hole extruding head into the upper swaging head after the hole extruding and swaging the blank together with the upper swaging head. The forming device has the advantages of simple and compact structure, low cost and energy consumption, little required swaging force, capability of reducing swaging forming difficulties and increasing internal performance and quality of a formed workpiece, reliability in forming, high percentage of pass and the like.

Description

technical field [0001] The invention relates to the technical field of metal extrusion forging, in particular to a forming device for metal plastic extrusion forging. Background technique [0002] Metal extrusion and forging technology is a method of pressure processing using the principle of metal plastic forming. The pretreated metal blank is put into the mold, and then pressure is applied to the metal blank to deform the metal blank and fill the mold cavity, thereby Get the parts you need. Metal extrusion and forging technology is an advanced technology with less cutting or no cutting, which is conducive to improving the quality of products, improving the internal microstructure and performance of products, and also has the advantages of material saving, low energy consumption, wide application range and flexible production It has the characteristics of high reliability, simple process flow and low investment in equipment. [0003] At present, there are still many techn...

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Problems solved by technology

[0004] The connection between the existing extrusion forging head and the piston rod of the main cylinder is generally threaded connection. Within the range of thread strength, the extrusion forging head directly acts on the surface of the workpiece blank with hydraulic energy, thereby deforming the workpiece blank

The extrusion forging head is in contact with the workpiece blank for one-time extrusion forging. Due to the large force-bearing area, a large pressure must be required to cause the workpiece blank to undergo plastic deformation. Extrusion forging is difficult and requires a large extrusion forging force. The performance of the system and the mold puts forward higher requirements, and the equipment cost and energy consumption are also greatly increased; and if multiple deformations are used, multiple extrusion forgings of multiple equipment are required to meet the precision requirements of parts, etc. As a result, the existing forming equipment and energy supply system are complicated, the equipment is bulky, large in investment, and high in cost; in addition, because the workpiece blank reaches the required shape through one-time continuous plastic deformation, the internal crystal phase structure of the metal flows during the extrusion forging process. High resistance, which will also affect the internal structural performance of the molded workpiece and reduce the quality of the molded workpiece

[0005] In addition, the current metal extrusion forging equipment adopts the open extrusion forging method, that is, the cavity of the mold is formed by the cooperation of the extrusion forging head and the open cavity, and the billet is formed between the extrusion forging head and the cavity before it is fully formed. The blank is in an unclosed state. During the extrusion forging process, the billet is prone to bending deformation, resulting in the inability to fully enter the mold cavity, resulting in defective products, which will also reduce the service life of the mold and even damage the mold.

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