Reverse Extrusion Active Floating Die Forming System and Forming Process

Abstract

The invention relates to the field of the forging and forming of material processing engineering, and particularly discloses a backward-extrusion active floating concave mold forming system comprises an upper mold plate and a lower mold mat, wherein the lower mold mat is arranged on a rapid forging hydraulic machine, the upper mold plate is arranged above the lower mold mat, an upper mold fixing block is connected to one side, adjacent to the lower mold mat, of the upper mold plate, the upper mold fixing block is connected with a punch, a hydraulic cylinder is arranged at one side, adjacent to the upper mold plate, of the lower mold mat, the hydraulic cylinder is connected with a concave mold, a storage cavity penetrating through the concave mold is formed in the concave mold, the punch is in clearance fit with the storage cavity, a concave mold core is connected to the storage cavity in a sliding manner, the moving speed of the concave mold is 0.5 to 5 times of an upward moving speed of a blank, and then the operation of six steps are carried out to finally form the blank. Compared with the prior art, the moving speed of the concave mold can be positively controlled, the forming force can be reduced, and the mobility of the blank can be improved.

Description

Technical field [0001] The invention relates to the field of material processing engineering forging and forging forming, in particular to a back-extrusion active floating concave die forming system and forming process. Background technique [0002] Forging is the collective name of forging and stamping. It is a forming and processing method that uses the hammer, anvil, or punch of a forging machine to apply pressure to the blank through a die to cause it to be plastically deformed, so as to obtain a workpiece of the required shape and size. . [0003] In the forging process, the billet as a whole undergoes significant plastic deformation, and there is a relatively large amount of plastic flow; in the stamping process, the billet is formed by changing the spatial position of the area of ​​each part, and there is no large distance plastic flow inside. Forging is mainly used to process metal parts, but can also be used to process certain non-metals, such as engineering plastics, rub...

AI Technical Summary

Problems solved by technology

In this type of mold system, the die is connected to the spring. When the blank is punched by the punch, the blank is deformed, and part of the blank will move upward through the gap between the punch and the die. Under the action of friction, the die slowly Move upward and return to the original position after forming; while the die is driven by the blank and cannot actively move with the blank, most of the forming force of the blank still exists inside the blank, which has a poor effect on reducing the forming force. Without the feature of increasing the fluidity of the billet, the die moves with the billet, and there is a large friction between the die and the billet, which will cause a large temperature drop

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