A Double Size Flange Forging Process

Abstract

The invention discloses a double-size flange forging process, which belongs to the technical field of flange production. The key points of the technical solution include the following steps: step S1: cutting, cutting the round steel according to the weight, and cutting it into bar blanks; step S2 : heating; step S3: upsetting; S4: forming by die forging, placing the rough blank on the forging die, and then using a press to forge and press the rough blank into a rough forming blank, the rough forming blank includes a large flange blank and a small flange The blank, the large flange blank and the small flange blank are coaxially fixedly connected; step S5: separate the punching holes, and place the rough forming blank on the separation die to separate the large flange blank and the small flange blank; step S6: grind ring; step S7: rough turning, the lathe performs rough turning on the large flange blank and the small flange to form a large flange and a small flange. The invention has the effect of improving the utilization rate of raw materials.

Description

technical field [0001] The invention relates to the technical field of flange production, more specifically, it relates to a double-size flange forging process. Background technique [0002] Forging is a processing method that uses forging machinery to apply pressure to metal blanks to cause plastic deformation to obtain forgings with certain mechanical properties, certain shapes and sizes. Forging can eliminate defects such as as-cast porosity produced in the metal smelting process and optimize the microstructure. At the same time, due to the preservation of complete metal flow lines, the mechanical properties of forgings are generally better than castings of the same material. Forging is the most common way in flange production. [0003] At present, the invention patent with publication number CN108571629A discloses a manufacturing process of a new type of flange, which includes the following steps: material selection: select a steel plate with a thickness of 60-100mm for...

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Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: in order to protect the mold during die forging, the protrusions at the center of the upper and lower dies for forming the center hole do not contact each other, so the center hole of the flange after die forging is left with a continuous skin, After the need, punching step is required to punch off the continuous skin, which leads to the reduction of raw material utilization rate and waste of raw materials

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