A mold and method for composite forming of flange plate forging, punching, extrusion and reverse upsetting

Abstract

The invention provides a die and method for flange plate forging and impact extrusion reverse upsetting composite molding. The mold comprises a lower die base assembly, a lower die and an upper die assembly, wherein the lower die base assembly comprises a lower die base, a first compression spring and cushion rings, the upper die assembly comprises an edge pressing ring, a second compression spring and a punch, vertical through holes are formed in the edge pressing ring, step holes are formed in the through holes, the punch is inserted into the through holes, an annular step is arranged on thepunch, and the second compression spring is arranged between the annular step and the lower bottom surface of the step holes. The method comprises the following steps of 1) making blanks; 2) heating;3) forging and pressing; 4) flanging; 5) carrying out impact extrusion; and 6) carrying out upset forging. The mold is ingeniously subjected to the action force and reaction force caused by the compression and reciprocating of the spring, and the movement in multiple opposite directions is realized, various molding modes such as forging and pressing, stretching, flanging, impact extrusion, reverse upsetting and the like are achieved, the integrity of the metal streamline is guaranteed, the the mold has higher mechanical properties, the structure is compact, the practicability is high, and themaintenance and replacement of the mold are facilitated.

Description

technical field [0001] The invention belongs to the technical field of forging, and in particular relates to a mold and method for composite forming of flange plate forging, punching, extrusion and reverse heading. Background technique [0002] Flanges are commonly used mechanical connection parts. For the manufacture of flanges, the commonly used method is mold forming, which is made into forging blanks through processes such as upsetting and punching, and then machined. There are many molding processes, and the material utilization rate is very low. At the same time, after a large margin of machining, the metal flow line is cut off, the service life and comprehensive performance of the product are reduced, and the manufacturing cycle is long. Flanges produced by stretch flanging technology have large rounded corners, irregular end faces, and limited height growth. Flanges that meet the size cannot be obtained, which hinders the popularization and application of plate forg...

AI Technical Summary

Problems solved by technology

There are many molding processes, and the utilization rate of materials is very low. At the same time, after a large margin of machining, the metal flow line is cut off, which reduces the service life and comprehensive performance of the product, and the manufacturing cycle is long.

Flanges produced by stretch flanging technology have large rounded corners, irregular end faces, and limited height growth. Flanges that meet the size cannot be obtained, which hinders the popularization and application of plate forging technology.

[0003] The existing sheet forging, punching and extrusion composite molding technology has two problems. One is that the neck of the flange needs to be squeezed vigorously, and it is difficult to separate the flange and the mold when they are wrapped together; Under the action of punching and extrusion, it is easy to form large tensile rounded corners and uneven end faces

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