Oblate flange complete fiber forging technology

Abstract

The invention provides oblate flange complete fiber forging technology. A complete fiber flow of oblate flange forged piece metal is obtained. Machining allowance of a forged piece is reduced, a material using rate is improved, and process cost of heat processing after forging is reduced. Therefore, inside portion and outside portion of the forged piece are compactly organized, mechanical performance is enhanced, and heat treatment process pressure is reduced. The oblate flange complete fiber forging technology is characterized by comprising the following steps: (1) the dimensions of forged materials are calculated and blanking is conducted; (2) the outer circles of the forged materials are rounded; (3) the forged materials are punched; (4) local drawing-out is conducted on an inner hole through a mandrel; and (5) chambering is conducted on the forged piece obtained by the step (4) and the forged piece is flattened to form a flange.

Description

technical field

[0001] The invention relates to the technical field of forging technology for mechanical parts, in particular to a full-fiber forging technology for oblate and circular flanges. Background technique

[0002] For the production process of high-pressure forged special-shaped flanges, for a long time, countries all over the world generally adopt the traditional free forging process combined with mechanical processing technology for production. Forgings have a large processing allowance, internal tissue fiber breakage, and low material utilization, resulting in increased machining workload, increased equipment workload, and great material waste. In addition, the fiber streamlines of the oblate forging metal are changed, and the relatively dense forging area inside and outside the flange is also machined away, resulting in poor internal structure and performance of the forging, and increased pressure in the heat treatment process. These defects seriously affect t...

Examples

Embodiment Construction

[0018] The following describes the full-fiber forging process of oblate flanges in combination with specific oblate flanges:

[0019] See figure 1 As shown, a full-fiber forging process for oblate flanges includes the following steps:

[0020] 1. Calculate the size and cutting of forging material:

[0021] (1) Riser pressing and chamfering of forgings at 1230-850°C;

[0022] (2) Upsetting the forging to Φ900mm at 1230-800°C, using a 700mm upper flat anvil and lower turntable, pulling 8 times according to the program, and cutting 680mm×1500mm;

[0023] 2. Rounding of the outer ring of the forging material: the forging is subjected to rotary upsetting, rotary flattening, rounding, and punching at 1230-750°C;

[0024] 3. Forging punching: punching Φ275mm for forgings at 1230-750°C;

[0025] 4. Use the mandrel for local elongation at the inner hole: ream the forging at 1230-700 ° C, flatten it, insert the mandrel Φ270 mm for local elongation, and flatten;

[0026] 5. Reaming ...

technical field

[0001] The invention relates to the technical field of forging technology for mechanical parts, in particular to a full-fiber forging technology for oblate and circular flanges. Background technique

[0002] For the production process of high-pressure forged special-shaped flanges, for a long time, countries all over the world generally adopt the traditional free forging process combined with mechanical processing technology for production. Forgings have a large processing allowance, internal tissue fiber breakage, and low material utilization, resulting in increased machining workload, increased equipment workload, and great material waste. In addition, the fiber streamlines of the oblate forging metal are changed, and the relatively dense forging area inside and outside the flange is also machined away, resulting in poor internal structure and performance of the forging, and increased pressure in the heat treatment process. These defects seriously affect t...

Examples

Embodiment Construction

[0018] The following describes the full-fiber forging process of oblate flanges in combination with specific oblate flanges:

[0019] See figure 1 As shown, a full-fiber forging process for oblate flanges includes the following steps:

[0020] 1. Calculate the size and cutting of forging material:

[0021] (1) Riser pressing and chamfering of forgings at 1230-850°C;

[0022] (2) Upsetting the forging to Φ900mm at 1230-800°C, using a 700mm upper flat anvil and lower turntable, pulling 8 times according to the program, and cutting 680mm×1500mm;

[0023] 2. Rounding of the outer ring of the forging material: the forging is subjected to rotary upsetting, rotary flattening, rounding, and punching at 1230-750°C;

[0024] 3. Forging punching: punching Φ275mm for forgings at 1230-750°C;

[0025] 4. Use the mandrel for local elongation at the inner hole: ream the forging at 1230-700 ° C, flatten it, insert the mandrel Φ270 mm for local elongation, and flatten;

[0026] 5. Reaming ...

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